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Add prebuild OpenSSL, and remove SCHANNEL code and whatever it was on MacOS. Build mingw for 64-bit.

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git-svn-id: https://www.unprompted.com/svn/projects/tildefriends/trunk@4088 ed5197a5-7fde-0310-b194-c3ffbd925b24
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Cory McWilliams
2022-12-29 23:55:49 +00:00
parent d9aee6d05f
commit 09ddfffa6b
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.\" ========================================================================
.\"
.IX Title "ED25519 7"
.TH ED25519 7 "2020-04-21" "1.1.1g" "OpenSSL"
.\" For nroff, turn off justification. Always turn off hyphenation; it makes
.\" way too many mistakes in technical documents.
.if n .ad l
.nh
.SH "NAME"
Ed25519, Ed448 \&\- EVP_PKEY Ed25519 and Ed448 support
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
The \fBEd25519\fR and \fBEd448\fR \s-1EVP_PKEY\s0 implementation supports key generation,
one-shot digest sign and digest verify using PureEdDSA and \fBEd25519\fR or \fBEd448\fR
(see \s-1RFC8032\s0). It has associated private and public key formats compatible with
\&\s-1RFC 8410.\s0
.PP
No additional parameters can be set during key generation, one-shot signing or
verification. In particular, because PureEdDSA is used, a digest must \fB\s-1NOT\s0\fR be
specified when signing or verifying.
.SH "NOTES"
.IX Header "NOTES"
The PureEdDSA algorithm does not support the streaming mechanism
of other signature algorithms using, for example, \fBEVP_DigestUpdate()\fR.
The message to sign or verify must be passed using the one-shot
\&\fBEVP_DigestSign()\fR and \fBEVP_DigestVerify()\fR functions.
.PP
When calling \fBEVP_DigestSignInit()\fR or \fBEVP_DigestVerifyInit()\fR, the
digest \fBtype\fR parameter \fB\s-1MUST\s0\fR be set to \fB\s-1NULL\s0\fR.
.PP
Applications wishing to sign certificates (or other structures such as
CRLs or certificate requests) using Ed25519 or Ed448 can either use \fBX509_sign()\fR
or \fBX509_sign_ctx()\fR in the usual way.
.PP
A context for the \fBEd25519\fR algorithm can be obtained by calling:
.PP
.Vb 1
\& EVP_PKEY_CTX *pctx = EVP_PKEY_CTX_new_id(EVP_PKEY_ED25519, NULL);
.Ve
.PP
For the \fBEd448\fR algorithm a context can be obtained by calling:
.PP
.Vb 1
\& EVP_PKEY_CTX *pctx = EVP_PKEY_CTX_new_id(EVP_PKEY_ED448, NULL);
.Ve
.PP
Ed25519 or Ed448 private keys can be set directly using
\&\fBEVP_PKEY_new_raw_private_key\fR\|(3) or loaded from a PKCS#8 private key file
using \fBPEM_read_bio_PrivateKey\fR\|(3) (or similar function). Completely new keys
can also be generated (see the example below). Setting a private key also sets
the associated public key.
.PP
Ed25519 or Ed448 public keys can be set directly using
\&\fBEVP_PKEY_new_raw_public_key\fR\|(3) or loaded from a SubjectPublicKeyInfo
structure in a \s-1PEM\s0 file using \fBPEM_read_bio_PUBKEY\fR\|(3) (or similar function).
.PP
Ed25519 and Ed448 can be tested within \fBspeed\fR\|(1) application since version 1.1.1.
Valid algorithm names are \fBed25519\fR, \fBed448\fR and \fBeddsa\fR. If \fBeddsa\fR is
specified, then both Ed25519 and Ed448 are benchmarked.
.SH "EXAMPLES"
.IX Header "EXAMPLES"
This example generates an \fB\s-1ED25519\s0\fR private key and writes it to standard
output in \s-1PEM\s0 format:
.PP
.Vb 9
\& #include <openssl/evp.h>
\& #include <openssl/pem.h>
\& ...
\& EVP_PKEY *pkey = NULL;
\& EVP_PKEY_CTX *pctx = EVP_PKEY_CTX_new_id(EVP_PKEY_ED25519, NULL);
\& EVP_PKEY_keygen_init(pctx);
\& EVP_PKEY_keygen(pctx, &pkey);
\& EVP_PKEY_CTX_free(pctx);
\& PEM_write_PrivateKey(stdout, pkey, NULL, NULL, 0, NULL, NULL);
.Ve
.SH "SEE ALSO"
.IX Header "SEE ALSO"
\&\fBEVP_PKEY_CTX_new\fR\|(3),
\&\fBEVP_PKEY_keygen\fR\|(3),
\&\fBEVP_DigestSignInit\fR\|(3),
\&\fBEVP_DigestVerifyInit\fR\|(3),
.SH "COPYRIGHT"
.IX Header "COPYRIGHT"
Copyright 2017\-2020 The OpenSSL Project Authors. All Rights Reserved.
.PP
Licensed under the OpenSSL license (the \*(L"License\*(R"). You may not use
this file except in compliance with the License. You can obtain a copy
in the file \s-1LICENSE\s0 in the source distribution or at
<https://www.openssl.org/source/license.html>.

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.\" Automatically generated by Pod::Man 4.14 (Pod::Simple 3.42)
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.nf
.ne \\$1
..
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.\"
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.\" entries marked with X<> in POD. Of course, you'll have to process the
.\" output yourself in some meaningful fashion.
.\"
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..
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.\" ========================================================================
.\"
.IX Title "RAND 7"
.TH RAND 7 "2020-04-21" "1.1.1g" "OpenSSL"
.\" For nroff, turn off justification. Always turn off hyphenation; it makes
.\" way too many mistakes in technical documents.
.if n .ad l
.nh
.SH "NAME"
RAND \&\- the OpenSSL random generator
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
Random numbers are a vital part of cryptography, they are needed to provide
unpredictability for tasks like key generation, creating salts, and many more.
Software-based generators must be seeded with external randomness before they
can be used as a cryptographically-secure pseudo-random number generator
(\s-1CSPRNG\s0).
The availability of common hardware with special instructions and
modern operating systems, which may use items such as interrupt jitter
and network packet timings, can be reasonable sources of seeding material.
.PP
OpenSSL comes with a default implementation of the \s-1RAND API\s0 which is based on
the deterministic random bit generator (\s-1DRBG\s0) model as described in
[\s-1NIST SP 800\-90A\s0 Rev. 1]. The default random generator will initialize
automatically on first use and will be fully functional without having
to be initialized ('seeded') explicitly.
It seeds and reseeds itself automatically using trusted random sources
provided by the operating system.
.PP
As a normal application developer, you do not have to worry about any details,
just use \fBRAND_bytes\fR\|(3) to obtain random data.
Having said that, there is one important rule to obey: Always check the error
return value of \fBRAND_bytes\fR\|(3) and do not take randomness for granted.
Although (re\-)seeding is automatic, it can fail because no trusted random source
is available or the trusted source(s) temporarily fail to provide sufficient
random seed material.
In this case the \s-1CSPRNG\s0 enters an error state and ceases to provide output,
until it is able to recover from the error by reseeding itself.
For more details on reseeding and error recovery, see \s-1\fBRAND_DRBG\s0\fR\|(7).
.PP
For values that should remain secret, you can use \fBRAND_priv_bytes\fR\|(3)
instead.
This method does not provide 'better' randomness, it uses the same type of \s-1CSPRNG.\s0
The intention behind using a dedicated \s-1CSPRNG\s0 exclusively for private
values is that none of its output should be visible to an attacker (e.g.,
used as salt value), in order to reveal as little information as
possible about its internal state, and that a compromise of the \*(L"public\*(R"
\&\s-1CSPRNG\s0 instance will not affect the secrecy of these private values.
.PP
In the rare case where the default implementation does not satisfy your special
requirements, there are two options:
.IP "\(bu" 2
Replace the default \s-1RAND\s0 method by your own \s-1RAND\s0 method using
\&\fBRAND_set_rand_method\fR\|(3).
.IP "\(bu" 2
Modify the default settings of the OpenSSL \s-1RAND\s0 method by modifying the security
parameters of the underlying \s-1DRBG,\s0 which is described in detail in \s-1\fBRAND_DRBG\s0\fR\|(7).
.PP
Changing the default random generator or its default parameters should be necessary
only in exceptional cases and is not recommended, unless you have a profound knowledge
of cryptographic principles and understand the implications of your changes.
.SH "SEE ALSO"
.IX Header "SEE ALSO"
\&\fBRAND_add\fR\|(3),
\&\fBRAND_bytes\fR\|(3),
\&\fBRAND_priv_bytes\fR\|(3),
\&\fBRAND_get_rand_method\fR\|(3),
\&\fBRAND_set_rand_method\fR\|(3),
\&\fBRAND_OpenSSL\fR\|(3),
\&\s-1\fBRAND_DRBG\s0\fR\|(7)
.SH "COPYRIGHT"
.IX Header "COPYRIGHT"
Copyright 2018\-2019 The OpenSSL Project Authors. All Rights Reserved.
.PP
Licensed under the OpenSSL license (the \*(L"License\*(R"). You may not use
this file except in compliance with the License. You can obtain a copy
in the file \s-1LICENSE\s0 in the source distribution or at
<https://www.openssl.org/source/license.html>.

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.tr \(*W-
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.rm #[ #] #H #V #F C
.\" ========================================================================
.\"
.IX Title "RAND_DRBG 7"
.TH RAND_DRBG 7 "2020-04-21" "1.1.1g" "OpenSSL"
.\" For nroff, turn off justification. Always turn off hyphenation; it makes
.\" way too many mistakes in technical documents.
.if n .ad l
.nh
.SH "NAME"
RAND_DRBG \- the deterministic random bit generator
.SH "SYNOPSIS"
.IX Header "SYNOPSIS"
.Vb 1
\& #include <openssl/rand_drbg.h>
.Ve
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
The default OpenSSL \s-1RAND\s0 method is based on the \s-1RAND_DRBG\s0 class,
which implements a deterministic random bit generator (\s-1DRBG\s0).
A \s-1DRBG\s0 is a certain type of cryptographically-secure pseudo-random
number generator (\s-1CSPRNG\s0), which is described in
[\s-1NIST SP 800\-90A\s0 Rev. 1].
.PP
While the \s-1RAND API\s0 is the 'frontend' which is intended to be used by
application developers for obtaining random bytes, the \s-1RAND_DRBG API\s0
serves as the 'backend', connecting the former with the operating
systems's entropy sources and providing access to the \s-1DRBG\s0's
configuration parameters.
.SS "Disclaimer"
.IX Subsection "Disclaimer"
Unless you have very specific requirements for your random generator,
it is in general not necessary to utilize the \s-1RAND_DRBG API\s0 directly.
The usual way to obtain random bytes is to use \fBRAND_bytes\fR\|(3) or
\&\fBRAND_priv_bytes\fR\|(3), see also \s-1\fBRAND\s0\fR\|(7).
.SS "Typical Use Cases"
.IX Subsection "Typical Use Cases"
Typical examples for such special use cases are the following:
.IP "\(bu" 2
You want to use your own private \s-1DRBG\s0 instances.
Multiple \s-1DRBG\s0 instances which are accessed only by a single thread provide
additional security (because their internal states are independent) and
better scalability in multithreaded applications (because they don't need
to be locked).
.IP "\(bu" 2
You need to integrate a previously unsupported entropy source.
.IP "\(bu" 2
You need to change the default settings of the standard OpenSSL \s-1RAND\s0
implementation to meet specific requirements.
.SH "CHAINING"
.IX Header "CHAINING"
A \s-1DRBG\s0 instance can be used as the entropy source of another \s-1DRBG\s0 instance,
provided it has itself access to a valid entropy source.
The \s-1DRBG\s0 instance which acts as entropy source is called the \fIparent\fR \s-1DRBG,\s0
the other instance the \fIchild\fR \s-1DRBG.\s0
.PP
This is called chaining. A chained \s-1DRBG\s0 instance is created by passing
a pointer to the parent \s-1DRBG\s0 as argument to the \fBRAND_DRBG_new()\fR call.
It is possible to create chains of more than two \s-1DRBG\s0 in a row.
.SH "THE THREE SHARED DRBG INSTANCES"
.IX Header "THE THREE SHARED DRBG INSTANCES"
Currently, there are three shared \s-1DRBG\s0 instances,
the <master>, <public>, and <private> \s-1DRBG.\s0
While the <master> \s-1DRBG\s0 is a single global instance, the <public> and <private>
\&\s-1DRBG\s0 are created per thread and accessed through thread-local storage.
.PP
By default, the functions \fBRAND_bytes\fR\|(3) and \fBRAND_priv_bytes\fR\|(3) use
the thread-local <public> and <private> \s-1DRBG\s0 instance, respectively.
.SS "The <master> \s-1DRBG\s0 instance"
.IX Subsection "The <master> DRBG instance"
The <master> \s-1DRBG\s0 is not used directly by the application, only for reseeding
the two other two \s-1DRBG\s0 instances. It reseeds itself by obtaining randomness
either from os entropy sources or by consuming randomness which was added
previously by \fBRAND_add\fR\|(3).
.SS "The <public> \s-1DRBG\s0 instance"
.IX Subsection "The <public> DRBG instance"
This instance is used per default by \fBRAND_bytes\fR\|(3).
.SS "The <private> \s-1DRBG\s0 instance"
.IX Subsection "The <private> DRBG instance"
This instance is used per default by \fBRAND_priv_bytes\fR\|(3)
.SH "LOCKING"
.IX Header "LOCKING"
The <master> \s-1DRBG\s0 is intended to be accessed concurrently for reseeding
by its child \s-1DRBG\s0 instances. The necessary locking is done internally.
It is \fInot\fR thread-safe to access the <master> \s-1DRBG\s0 directly via the
\&\s-1RAND_DRBG\s0 interface.
The <public> and <private> \s-1DRBG\s0 are thread-local, i.e. there is an
instance of each per thread. So they can safely be accessed without
locking via the \s-1RAND_DRBG\s0 interface.
.PP
Pointers to these \s-1DRBG\s0 instances can be obtained using
\&\fBRAND_DRBG_get0_master()\fR,
\&\fBRAND_DRBG_get0_public()\fR, and
\&\fBRAND_DRBG_get0_private()\fR, respectively.
Note that it is not allowed to store a pointer to one of the thread-local
\&\s-1DRBG\s0 instances in a variable or other memory location where it will be
accessed and used by multiple threads.
.PP
All other \s-1DRBG\s0 instances created by an application don't support locking,
because they are intended to be used by a single thread.
Instead of accessing a single \s-1DRBG\s0 instance concurrently from different
threads, it is recommended to instantiate a separate \s-1DRBG\s0 instance per
thread. Using the <master> \s-1DRBG\s0 as entropy source for multiple \s-1DRBG\s0
instances on different threads is thread-safe, because the \s-1DRBG\s0 instance
will lock the <master> \s-1DRBG\s0 automatically for obtaining random input.
.SH "THE OVERALL PICTURE"
.IX Header "THE OVERALL PICTURE"
The following picture gives an overview over how the \s-1DRBG\s0 instances work
together and are being used.
.PP
.Vb 10
\& +\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-+
\& | os entropy sources |
\& +\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-+
\& |
\& v +\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-+
\& RAND_add() ==> <master> <\-| shared DRBG (with locking) |
\& / \e +\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-+
\& / \e +\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-+
\& <public> <private> <\- | per\-thread DRBG instances |
\& | | +\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-+
\& v v
\& RAND_bytes() RAND_priv_bytes()
\& | ^
\& | |
\& +\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-+ +\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-+
\& | general purpose | | used for secrets like session keys |
\& | random generator | | and private keys for certificates |
\& +\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-+ +\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-+
.Ve
.PP
The usual way to obtain random bytes is to call RAND_bytes(...) or
RAND_priv_bytes(...). These calls are roughly equivalent to calling
RAND_DRBG_bytes(<public>, ...) and RAND_DRBG_bytes(<private>, ...),
respectively. The method \fBRAND_DRBG_bytes\fR\|(3) is a convenience method
wrapping the \fBRAND_DRBG_generate\fR\|(3) function, which serves the actual
request for random data.
.SH "RESEEDING"
.IX Header "RESEEDING"
A \s-1DRBG\s0 instance seeds itself automatically, pulling random input from
its entropy source. The entropy source can be either a trusted operating
system entropy source, or another \s-1DRBG\s0 with access to such a source.
.PP
Automatic reseeding occurs after a predefined number of generate requests.
The selection of the trusted entropy sources is configured at build
time using the \-\-with\-rand\-seed option. The following sections explain
the reseeding process in more detail.
.SS "Automatic Reseeding"
.IX Subsection "Automatic Reseeding"
Before satisfying a generate request (\fBRAND_DRBG_generate\fR\|(3)), the \s-1DRBG\s0
reseeds itself automatically, if one of the following conditions holds:
.PP
\&\- the \s-1DRBG\s0 was not instantiated (=seeded) yet or has been uninstantiated.
.PP
\&\- the number of generate requests since the last reseeding exceeds a
certain threshold, the so called \fIreseed_interval\fR.
This behaviour can be disabled by setting the \fIreseed_interval\fR to 0.
.PP
\&\- the time elapsed since the last reseeding exceeds a certain time
interval, the so called \fIreseed_time_interval\fR.
This can be disabled by setting the \fIreseed_time_interval\fR to 0.
.PP
\&\- the \s-1DRBG\s0 is in an error state.
.PP
\&\fBNote\fR: An error state is entered if the entropy source fails while
the \s-1DRBG\s0 is seeding or reseeding.
The last case ensures that the \s-1DRBG\s0 automatically recovers
from the error as soon as the entropy source is available again.
.SS "Manual Reseeding"
.IX Subsection "Manual Reseeding"
In addition to automatic reseeding, the caller can request an immediate
reseeding of the \s-1DRBG\s0 with fresh entropy by setting the
\&\fIprediction resistance\fR parameter to 1 when calling \fBRAND_DRBG_generate\fR\|(3).
.PP
The document [\s-1NIST SP 800\-90C\s0] describes prediction resistance requests
in detail and imposes strict conditions on the entropy sources that are
approved for providing prediction resistance.
Since the default \s-1DRBG\s0 implementation does not have access to such an approved
entropy source, a request for prediction resistance will currently always fail.
In other words, prediction resistance is currently not supported yet by the \s-1DRBG.\s0
.PP
For the three shared DRBGs (and only for these) there is another way to
reseed them manually:
If \fBRAND_add\fR\|(3) is called with a positive \fIrandomness\fR argument
(or \fBRAND_seed\fR\|(3)), then this will immediately reseed the <master> \s-1DRBG.\s0
The <public> and <private> \s-1DRBG\s0 will detect this on their next generate
call and reseed, pulling randomness from <master>.
.PP
The last feature has been added to support the common practice used with
previous OpenSSL versions to call \fBRAND_add()\fR before calling \fBRAND_bytes()\fR.
.SS "Entropy Input vs. Additional Data"
.IX Subsection "Entropy Input vs. Additional Data"
The \s-1DRBG\s0 distinguishes two different types of random input: \fIentropy\fR,
which comes from a trusted source, and \fIadditional input\fR',
which can optionally be added by the user and is considered untrusted.
It is possible to add \fIadditional input\fR not only during reseeding,
but also for every generate request.
This is in fact done automatically by \fBRAND_DRBG_bytes\fR\|(3).
.SS "Configuring the Random Seed Source"
.IX Subsection "Configuring the Random Seed Source"
In most cases OpenSSL will automatically choose a suitable seed source
for automatically seeding and reseeding its <master> \s-1DRBG.\s0 In some cases
however, it will be necessary to explicitly specify a seed source during
configuration, using the \-\-with\-rand\-seed option. For more information,
see the \s-1INSTALL\s0 instructions. There are also operating systems where no
seed source is available and automatic reseeding is disabled by default.
.PP
The following two sections describe the reseeding process of the master
\&\s-1DRBG,\s0 depending on whether automatic reseeding is available or not.
.SS "Reseeding the master \s-1DRBG\s0 with automatic seeding enabled"
.IX Subsection "Reseeding the master DRBG with automatic seeding enabled"
Calling \fBRAND_poll()\fR or \fBRAND_add()\fR is not necessary, because the \s-1DRBG\s0
pulls the necessary entropy from its source automatically.
However, both calls are permitted, and do reseed the \s-1RNG.\s0
.PP
\&\fBRAND_add()\fR can be used to add both kinds of random input, depending on the
value of the \fBrandomness\fR argument:
.IP "randomness == 0:" 4
.IX Item "randomness == 0:"
The random bytes are mixed as additional input into the current state of
the \s-1DRBG.\s0
Mixing in additional input is not considered a full reseeding, hence the
reseed counter is not reset.
.IP "randomness > 0:" 4
.IX Item "randomness > 0:"
The random bytes are used as entropy input for a full reseeding
(resp. reinstantiation) if the \s-1DRBG\s0 is instantiated
(resp. uninstantiated or in an error state).
The number of random bits required for reseeding is determined by the
security strength of the \s-1DRBG.\s0 Currently it defaults to 256 bits (32 bytes).
It is possible to provide less randomness than required.
In this case the missing randomness will be obtained by pulling random input
from the trusted entropy sources.
.SS "Reseeding the master \s-1DRBG\s0 with automatic seeding disabled"
.IX Subsection "Reseeding the master DRBG with automatic seeding disabled"
Calling \fBRAND_poll()\fR will always fail.
.PP
\&\fBRAND_add()\fR needs to be called for initial seeding and periodic reseeding.
At least 48 bytes (384 bits) of randomness have to be provided, otherwise
the (re\-)seeding of the \s-1DRBG\s0 will fail. This corresponds to one and a half
times the security strength of the \s-1DRBG.\s0 The extra half is used for the
nonce during instantiation.
.PP
More precisely, the number of bytes needed for seeding depend on the
\&\fIsecurity strength\fR of the \s-1DRBG,\s0 which is set to 256 by default.
.SH "SEE ALSO"
.IX Header "SEE ALSO"
\&\fBRAND_DRBG_bytes\fR\|(3),
\&\fBRAND_DRBG_generate\fR\|(3),
\&\fBRAND_DRBG_reseed\fR\|(3),
\&\fBRAND_DRBG_get0_master\fR\|(3),
\&\fBRAND_DRBG_get0_public\fR\|(3),
\&\fBRAND_DRBG_get0_private\fR\|(3),
\&\fBRAND_DRBG_set_reseed_interval\fR\|(3),
\&\fBRAND_DRBG_set_reseed_time_interval\fR\|(3),
\&\fBRAND_DRBG_set_reseed_defaults\fR\|(3),
\&\s-1\fBRAND\s0\fR\|(7),
.SH "COPYRIGHT"
.IX Header "COPYRIGHT"
Copyright 2017\-2018 The OpenSSL Project Authors. All Rights Reserved.
.PP
Licensed under the OpenSSL license (the \*(L"License\*(R"). You may not use
this file except in compliance with the License. You can obtain a copy
in the file \s-1LICENSE\s0 in the source distribution or at
<https://www.openssl.org/source/license.html>.

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.\" ========================================================================
.\"
.IX Title "RSA-PSS 7"
.TH RSA-PSS 7 "2020-04-21" "1.1.1g" "OpenSSL"
.\" For nroff, turn off justification. Always turn off hyphenation; it makes
.\" way too many mistakes in technical documents.
.if n .ad l
.nh
.SH "NAME"
RSA\-PSS \- EVP_PKEY RSA\-PSS algorithm support
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
The \fBRSA-PSS\fR \s-1EVP_PKEY\s0 implementation is a restricted version of the \s-1RSA\s0
algorithm which only supports signing, verification and key generation
using \s-1PSS\s0 padding modes with optional parameter restrictions.
.PP
It has associated private key and public key formats.
.PP
This algorithm shares several control operations with the \fB\s-1RSA\s0\fR algorithm
but with some restrictions described below.
.SS "Signing and Verification"
.IX Subsection "Signing and Verification"
Signing and verification is similar to the \fB\s-1RSA\s0\fR algorithm except the
padding mode is always \s-1PSS.\s0 If the key in use has parameter restrictions then
the corresponding signature parameters are set to the restrictions:
for example, if the key can only be used with digest \s-1SHA256, MGF1 SHA256\s0
and minimum salt length 32 then the digest, \s-1MGF1\s0 digest and salt length
will be set to \s-1SHA256, SHA256\s0 and 32 respectively.
.SS "Key Generation"
.IX Subsection "Key Generation"
By default no parameter restrictions are placed on the generated key.
.SH "NOTES"
.IX Header "NOTES"
The public key format is documented in \s-1RFC4055.\s0
.PP
The PKCS#8 private key format used for RSA-PSS keys is similar to the \s-1RSA\s0
format except it uses the \fBid-RSASSA-PSS\fR \s-1OID\s0 and the parameters field, if
present, restricts the key parameters in the same way as the public key.
.SH "CONFORMING TO"
.IX Header "CONFORMING TO"
\&\s-1RFC 4055\s0
.SH "SEE ALSO"
.IX Header "SEE ALSO"
\&\fBEVP_PKEY_CTX_set_rsa_pss_keygen_md\fR\|(3),
\&\fBEVP_PKEY_CTX_set_rsa_pss_keygen_mgf1_md\fR\|(3),
\&\fBEVP_PKEY_CTX_set_rsa_pss_keygen_saltlen\fR\|(3),
\&\fBEVP_PKEY_CTX_new\fR\|(3),
\&\fBEVP_PKEY_CTX_ctrl_str\fR\|(3),
\&\fBEVP_PKEY_derive\fR\|(3)
.SH "COPYRIGHT"
.IX Header "COPYRIGHT"
Copyright 2017\-2018 The OpenSSL Project Authors. All Rights Reserved.
.PP
Licensed under the OpenSSL license (the \*(L"License\*(R"). You may not use
this file except in compliance with the License. You can obtain a copy
in the file \s-1LICENSE\s0 in the source distribution or at
<https://www.openssl.org/source/license.html>.

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. if (\n(.H=4u)&(1m=24u) .ds -- \(*W\h'-12u'\(*W\h'-12u'-\" diablo 10 pitch
. if (\n(.H=4u)&(1m=20u) .ds -- \(*W\h'-12u'\(*W\h'-8u'-\" diablo 12 pitch
. ds L" ""
. ds R" ""
. ds C` ""
. ds C' ""
'br\}
.el\{\
. ds -- \|\(em\|
. ds PI \(*p
. ds L" ``
. ds R" ''
. ds C`
. ds C'
'br\}
.\"
.\" Escape single quotes in literal strings from groff's Unicode transform.
.ie \n(.g .ds Aq \(aq
.el .ds Aq '
.\"
.\" If the F register is >0, we'll generate index entries on stderr for
.\" titles (.TH), headers (.SH), subsections (.SS), items (.Ip), and index
.\" entries marked with X<> in POD. Of course, you'll have to process the
.\" output yourself in some meaningful fashion.
.\"
.\" Avoid warning from groff about undefined register 'F'.
.de IX
..
.nr rF 0
.if \n(.g .if rF .nr rF 1
.if (\n(rF:(\n(.g==0)) \{\
. if \nF \{\
. de IX
. tm Index:\\$1\t\\n%\t"\\$2"
..
. if !\nF==2 \{\
. nr % 0
. nr F 2
. \}
. \}
.\}
.rr rF
.\"
.\" Accent mark definitions (@(#)ms.acc 1.5 88/02/08 SMI; from UCB 4.2).
.\" Fear. Run. Save yourself. No user-serviceable parts.
. \" fudge factors for nroff and troff
.if n \{\
. ds #H 0
. ds #V .8m
. ds #F .3m
. ds #[ \f1
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. ds #H ((1u-(\\\\n(.fu%2u))*.13m)
. ds #V .6m
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. ds #[ \&
. ds #] \&
.\}
. \" simple accents for nroff and troff
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. ds ^ \&
. ds , \&
. ds ~ ~
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. ds ^ \\k:\h'-(\\n(.wu*10/11-\*(#H)'^\h'|\\n:u'
. ds , \\k:\h'-(\\n(.wu*8/10)',\h'|\\n:u'
. ds ~ \\k:\h'-(\\n(.wu-\*(#H-.1m)'~\h'|\\n:u'
. ds / \\k:\h'-(\\n(.wu*8/10-\*(#H)'\z\(sl\h'|\\n:u'
.\}
. \" troff and (daisy-wheel) nroff accents
.ds : \\k:\h'-(\\n(.wu*8/10-\*(#H+.1m+\*(#F)'\v'-\*(#V'\z.\h'.2m+\*(#F'.\h'|\\n:u'\v'\*(#V'
.ds 8 \h'\*(#H'\(*b\h'-\*(#H'
.ds o \\k:\h'-(\\n(.wu+\w'\(de'u-\*(#H)/2u'\v'-.3n'\*(#[\z\(de\v'.3n'\h'|\\n:u'\*(#]
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.ds D- D\\k:\h'-\w'D'u'\v'-.11m'\z\(hy\v'.11m'\h'|\\n:u'
.ds th \*(#[\v'.3m'\s+1I\s-1\v'-.3m'\h'-(\w'I'u*2/3)'\s-1o\s+1\*(#]
.ds Th \*(#[\s+2I\s-2\h'-\w'I'u*3/5'\v'-.3m'o\v'.3m'\*(#]
.ds ae a\h'-(\w'a'u*4/10)'e
.ds Ae A\h'-(\w'A'u*4/10)'E
. \" corrections for vroff
.if v .ds ~ \\k:\h'-(\\n(.wu*9/10-\*(#H)'\s-2\u~\d\s+2\h'|\\n:u'
.if v .ds ^ \\k:\h'-(\\n(.wu*10/11-\*(#H)'\v'-.4m'^\v'.4m'\h'|\\n:u'
. \" for low resolution devices (crt and lpr)
.if \n(.H>23 .if \n(.V>19 \
\{\
. ds : e
. ds 8 ss
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. ds th \o'bp'
. ds Th \o'LP'
. ds ae ae
. ds Ae AE
.\}
.rm #[ #] #H #V #F C
.\" ========================================================================
.\"
.IX Title "SM2 7"
.TH SM2 7 "2020-04-21" "1.1.1g" "OpenSSL"
.\" For nroff, turn off justification. Always turn off hyphenation; it makes
.\" way too many mistakes in technical documents.
.if n .ad l
.nh
.SH "NAME"
SM2 \- Chinese SM2 signature and encryption algorithm support
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
The \fB\s-1SM2\s0\fR algorithm was first defined by the Chinese national standard \s-1GM/T
0003\-2012\s0 and was later standardized by \s-1ISO\s0 as \s-1ISO/IEC 14888.\s0 \fB\s-1SM2\s0\fR is actually
an elliptic curve based algorithm. The current implementation in OpenSSL supports
both signature and encryption schemes via the \s-1EVP\s0 interface.
.PP
When doing the \fB\s-1SM2\s0\fR signature algorithm, it requires a distinguishing identifier
to form the message prefix which is hashed before the real message is hashed.
.SH "NOTES"
.IX Header "NOTES"
\&\fB\s-1SM2\s0\fR signatures can be generated by using the 'DigestSign' series of APIs, for
instance, \fBEVP_DigestSignInit()\fR, \fBEVP_DigestSignUpdate()\fR and \fBEVP_DigestSignFinal()\fR.
Ditto for the verification process by calling the 'DigestVerify' series of APIs.
.PP
There are several special steps that need to be done before computing an \fB\s-1SM2\s0\fR
signature.
.PP
The \fB\s-1EVP_PKEY\s0\fR structure will default to using \s-1ECDSA\s0 for signatures when it is
created. It should be set to \fB\s-1EVP_PKEY_SM2\s0\fR by calling:
.PP
.Vb 1
\& EVP_PKEY_set_alias_type(pkey, EVP_PKEY_SM2);
.Ve
.PP
Then an \s-1ID\s0 should be set by calling:
.PP
.Vb 1
\& EVP_PKEY_CTX_set1_id(pctx, id, id_len);
.Ve
.PP
When calling the \fBEVP_DigestSignInit()\fR or \fBEVP_DigestVerifyInit()\fR functions, a
pre-allocated \fB\s-1EVP_PKEY_CTX\s0\fR should be assigned to the \fB\s-1EVP_MD_CTX\s0\fR. This is
done by calling:
.PP
.Vb 1
\& EVP_MD_CTX_set_pkey_ctx(mctx, pctx);
.Ve
.PP
And normally there is no need to pass a \fBpctx\fR parameter to \fBEVP_DigestSignInit()\fR
or \fBEVP_DigestVerifyInit()\fR in such a scenario.
.SH "EXAMPLES"
.IX Header "EXAMPLES"
This example demonstrates the calling sequence for using an \fB\s-1EVP_PKEY\s0\fR to verify
a message with the \s-1SM2\s0 signature algorithm and the \s-1SM3\s0 hash algorithm:
.PP
.Vb 1
\& #include <openssl/evp.h>
\&
\& /* obtain an EVP_PKEY using whatever methods... */
\& EVP_PKEY_set_alias_type(pkey, EVP_PKEY_SM2);
\& mctx = EVP_MD_CTX_new();
\& pctx = EVP_PKEY_CTX_new(pkey, NULL);
\& EVP_PKEY_CTX_set1_id(pctx, id, id_len);
\& EVP_MD_CTX_set_pkey_ctx(mctx, pctx);;
\& EVP_DigestVerifyInit(mctx, NULL, EVP_sm3(), NULL, pkey);
\& EVP_DigestVerifyUpdate(mctx, msg, msg_len);
\& EVP_DigestVerifyFinal(mctx, sig, sig_len)
.Ve
.SH "SEE ALSO"
.IX Header "SEE ALSO"
\&\fBEVP_PKEY_CTX_new\fR\|(3),
\&\fBEVP_PKEY_set_alias_type\fR\|(3),
\&\fBEVP_DigestSignInit\fR\|(3),
\&\fBEVP_DigestVerifyInit\fR\|(3),
\&\fBEVP_PKEY_CTX_set1_id\fR\|(3),
\&\fBEVP_MD_CTX_set_pkey_ctx\fR\|(3)
.SH "COPYRIGHT"
.IX Header "COPYRIGHT"
Copyright 2018\-2019 The OpenSSL Project Authors. All Rights Reserved.
.PP
Licensed under the OpenSSL license (the \*(L"License\*(R"). You may not use
this file except in compliance with the License. You can obtain a copy
in the file \s-1LICENSE\s0 in the source distribution or at
<https://www.openssl.org/source/license.html>.

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.\" Automatically generated by Pod::Man 4.14 (Pod::Simple 3.42)
.\"
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.de Sp \" Vertical space (when we can't use .PP)
.if t .sp .5v
.if n .sp
..
.de Vb \" Begin verbatim text
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.ne \\$1
..
.de Ve \" End verbatim text
.ft R
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..
.\" Set up some character translations and predefined strings. \*(-- will
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.\" nothing in troff, for use with C<>.
.tr \(*W-
.ds C+ C\v'-.1v'\h'-1p'\s-2+\h'-1p'+\s0\v'.1v'\h'-1p'
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'br\}
.el\{\
. ds -- \|\(em\|
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. ds L" ``
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'br\}
.\"
.\" Escape single quotes in literal strings from groff's Unicode transform.
.ie \n(.g .ds Aq \(aq
.el .ds Aq '
.\"
.\" If the F register is >0, we'll generate index entries on stderr for
.\" titles (.TH), headers (.SH), subsections (.SS), items (.Ip), and index
.\" entries marked with X<> in POD. Of course, you'll have to process the
.\" output yourself in some meaningful fashion.
.\"
.\" Avoid warning from groff about undefined register 'F'.
.de IX
..
.nr rF 0
.if \n(.g .if rF .nr rF 1
.if (\n(rF:(\n(.g==0)) \{\
. if \nF \{\
. de IX
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..
. if !\nF==2 \{\
. nr % 0
. nr F 2
. \}
. \}
.\}
.rr rF
.\"
.\" Accent mark definitions (@(#)ms.acc 1.5 88/02/08 SMI; from UCB 4.2).
.\" Fear. Run. Save yourself. No user-serviceable parts.
. \" fudge factors for nroff and troff
.if n \{\
. ds #H 0
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.ds th \*(#[\v'.3m'\s+1I\s-1\v'-.3m'\h'-(\w'I'u*2/3)'\s-1o\s+1\*(#]
.ds Th \*(#[\s+2I\s-2\h'-\w'I'u*3/5'\v'-.3m'o\v'.3m'\*(#]
.ds ae a\h'-(\w'a'u*4/10)'e
.ds Ae A\h'-(\w'A'u*4/10)'E
. \" corrections for vroff
.if v .ds ~ \\k:\h'-(\\n(.wu*9/10-\*(#H)'\s-2\u~\d\s+2\h'|\\n:u'
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. \" for low resolution devices (crt and lpr)
.if \n(.H>23 .if \n(.V>19 \
\{\
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. ds th \o'bp'
. ds Th \o'LP'
. ds ae ae
. ds Ae AE
.\}
.rm #[ #] #H #V #F C
.\" ========================================================================
.\"
.IX Title "X25519 7"
.TH X25519 7 "2020-04-21" "1.1.1g" "OpenSSL"
.\" For nroff, turn off justification. Always turn off hyphenation; it makes
.\" way too many mistakes in technical documents.
.if n .ad l
.nh
.SH "NAME"
X25519, X448 \&\- EVP_PKEY X25519 and X448 support
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
The \fBX25519\fR and \fBX448\fR \s-1EVP_PKEY\s0 implementation supports key generation and
key derivation using \fBX25519\fR and \fBX448\fR. It has associated private and public
key formats compatible with \s-1RFC 8410.\s0
.PP
No additional parameters can be set during key generation.
.PP
The peer public key must be set using \fBEVP_PKEY_derive_set_peer()\fR when
performing key derivation.
.SH "NOTES"
.IX Header "NOTES"
A context for the \fBX25519\fR algorithm can be obtained by calling:
.PP
.Vb 1
\& EVP_PKEY_CTX *pctx = EVP_PKEY_CTX_new_id(EVP_PKEY_X25519, NULL);
.Ve
.PP
For the \fBX448\fR algorithm a context can be obtained by calling:
.PP
.Vb 1
\& EVP_PKEY_CTX *pctx = EVP_PKEY_CTX_new_id(EVP_PKEY_X448, NULL);
.Ve
.PP
X25519 or X448 private keys can be set directly using
\&\fBEVP_PKEY_new_raw_private_key\fR\|(3) or loaded from a PKCS#8 private key file
using \fBPEM_read_bio_PrivateKey\fR\|(3) (or similar function). Completely new keys
can also be generated (see the example below). Setting a private key also sets
the associated public key.
.PP
X25519 or X448 public keys can be set directly using
\&\fBEVP_PKEY_new_raw_public_key\fR\|(3) or loaded from a SubjectPublicKeyInfo
structure in a \s-1PEM\s0 file using \fBPEM_read_bio_PUBKEY\fR\|(3) (or similar function).
.SH "EXAMPLES"
.IX Header "EXAMPLES"
This example generates an \fBX25519\fR private key and writes it to standard
output in \s-1PEM\s0 format:
.PP
.Vb 9
\& #include <openssl/evp.h>
\& #include <openssl/pem.h>
\& ...
\& EVP_PKEY *pkey = NULL;
\& EVP_PKEY_CTX *pctx = EVP_PKEY_CTX_new_id(EVP_PKEY_X25519, NULL);
\& EVP_PKEY_keygen_init(pctx);
\& EVP_PKEY_keygen(pctx, &pkey);
\& EVP_PKEY_CTX_free(pctx);
\& PEM_write_PrivateKey(stdout, pkey, NULL, NULL, 0, NULL, NULL);
.Ve
.PP
The key derivation example in \fBEVP_PKEY_derive\fR\|(3) can be used with
\&\fBX25519\fR and \fBX448\fR.
.SH "SEE ALSO"
.IX Header "SEE ALSO"
\&\fBEVP_PKEY_CTX_new\fR\|(3),
\&\fBEVP_PKEY_keygen\fR\|(3),
\&\fBEVP_PKEY_derive\fR\|(3),
\&\fBEVP_PKEY_derive_set_peer\fR\|(3)
.SH "COPYRIGHT"
.IX Header "COPYRIGHT"
Copyright 2017\-2020 The OpenSSL Project Authors. All Rights Reserved.
.PP
Licensed under the OpenSSL license (the \*(L"License\*(R"). You may not use
this file except in compliance with the License. You can obtain a copy
in the file \s-1LICENSE\s0 in the source distribution or at
<https://www.openssl.org/source/license.html>.

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.\" Automatically generated by Pod::Man 4.14 (Pod::Simple 3.42)
.\"
.\" Standard preamble:
.\" ========================================================================
.de Sp \" Vertical space (when we can't use .PP)
.if t .sp .5v
.if n .sp
..
.de Vb \" Begin verbatim text
.ft CW
.nf
.ne \\$1
..
.de Ve \" End verbatim text
.ft R
.fi
..
.\" Set up some character translations and predefined strings. \*(-- will
.\" give an unbreakable dash, \*(PI will give pi, \*(L" will give a left
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.\" give a nicer C++. Capital omega is used to do unbreakable dashes and
.\" therefore won't be available. \*(C` and \*(C' expand to `' in nroff,
.\" nothing in troff, for use with C<>.
.tr \(*W-
.ds C+ C\v'-.1v'\h'-1p'\s-2+\h'-1p'+\s0\v'.1v'\h'-1p'
.ie n \{\
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.el\{\
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.ie \n(.g .ds Aq \(aq
.el .ds Aq '
.\"
.\" If the F register is >0, we'll generate index entries on stderr for
.\" titles (.TH), headers (.SH), subsections (.SS), items (.Ip), and index
.\" entries marked with X<> in POD. Of course, you'll have to process the
.\" output yourself in some meaningful fashion.
.\"
.\" Avoid warning from groff about undefined register 'F'.
.de IX
..
.nr rF 0
.if \n(.g .if rF .nr rF 1
.if (\n(rF:(\n(.g==0)) \{\
. if \nF \{\
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..
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. nr % 0
. nr F 2
. \}
. \}
.\}
.rr rF
.\"
.\" Accent mark definitions (@(#)ms.acc 1.5 88/02/08 SMI; from UCB 4.2).
.\" Fear. Run. Save yourself. No user-serviceable parts.
. \" fudge factors for nroff and troff
.if n \{\
. ds #H 0
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. ds #F .3m
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.ds ae a\h'-(\w'a'u*4/10)'e
.ds Ae A\h'-(\w'A'u*4/10)'E
. \" corrections for vroff
.if v .ds ~ \\k:\h'-(\\n(.wu*9/10-\*(#H)'\s-2\u~\d\s+2\h'|\\n:u'
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. \" for low resolution devices (crt and lpr)
.if \n(.H>23 .if \n(.V>19 \
\{\
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. ds Th \o'LP'
. ds ae ae
. ds Ae AE
.\}
.rm #[ #] #H #V #F C
.\" ========================================================================
.\"
.IX Title "BIO 7"
.TH BIO 7 "2020-04-21" "1.1.1g" "OpenSSL"
.\" For nroff, turn off justification. Always turn off hyphenation; it makes
.\" way too many mistakes in technical documents.
.if n .ad l
.nh
.SH "NAME"
bio \- Basic I/O abstraction
.SH "SYNOPSIS"
.IX Header "SYNOPSIS"
.Vb 1
\& #include <openssl/bio.h>
.Ve
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
A \s-1BIO\s0 is an I/O abstraction, it hides many of the underlying I/O
details from an application. If an application uses a \s-1BIO\s0 for its
I/O it can transparently handle \s-1SSL\s0 connections, unencrypted network
connections and file I/O.
.PP
There are two type of \s-1BIO,\s0 a source/sink \s-1BIO\s0 and a filter \s-1BIO.\s0
.PP
As its name implies a source/sink \s-1BIO\s0 is a source and/or sink of data,
examples include a socket \s-1BIO\s0 and a file \s-1BIO.\s0
.PP
A filter \s-1BIO\s0 takes data from one \s-1BIO\s0 and passes it through to
another, or the application. The data may be left unmodified (for
example a message digest \s-1BIO\s0) or translated (for example an
encryption \s-1BIO\s0). The effect of a filter \s-1BIO\s0 may change according
to the I/O operation it is performing: for example an encryption
\&\s-1BIO\s0 will encrypt data if it is being written to and decrypt data
if it is being read from.
.PP
BIOs can be joined together to form a chain (a single \s-1BIO\s0 is a chain
with one component). A chain normally consist of one source/sink
\&\s-1BIO\s0 and one or more filter BIOs. Data read from or written to the
first \s-1BIO\s0 then traverses the chain to the end (normally a source/sink
\&\s-1BIO\s0).
.PP
Some BIOs (such as memory BIOs) can be used immediately after calling
\&\fBBIO_new()\fR. Others (such as file BIOs) need some additional initialization,
and frequently a utility function exists to create and initialize such BIOs.
.PP
If \fBBIO_free()\fR is called on a \s-1BIO\s0 chain it will only free one \s-1BIO\s0 resulting
in a memory leak.
.PP
Calling \fBBIO_free_all()\fR on a single \s-1BIO\s0 has the same effect as calling
\&\fBBIO_free()\fR on it other than the discarded return value.
.PP
Normally the \fBtype\fR argument is supplied by a function which returns a
pointer to a \s-1BIO_METHOD.\s0 There is a naming convention for such functions:
a source/sink \s-1BIO\s0 is normally called BIO_s_*() and a filter \s-1BIO\s0
BIO_f_*();
.SH "EXAMPLES"
.IX Header "EXAMPLES"
Create a memory \s-1BIO:\s0
.PP
.Vb 1
\& BIO *mem = BIO_new(BIO_s_mem());
.Ve
.SH "SEE ALSO"
.IX Header "SEE ALSO"
\&\fBBIO_ctrl\fR\|(3),
\&\fBBIO_f_base64\fR\|(3), \fBBIO_f_buffer\fR\|(3),
\&\fBBIO_f_cipher\fR\|(3), \fBBIO_f_md\fR\|(3),
\&\fBBIO_f_null\fR\|(3), \fBBIO_f_ssl\fR\|(3),
\&\fBBIO_find_type\fR\|(3), \fBBIO_new\fR\|(3),
\&\fBBIO_new_bio_pair\fR\|(3),
\&\fBBIO_push\fR\|(3), \fBBIO_read_ex\fR\|(3),
\&\fBBIO_s_accept\fR\|(3), \fBBIO_s_bio\fR\|(3),
\&\fBBIO_s_connect\fR\|(3), \fBBIO_s_fd\fR\|(3),
\&\fBBIO_s_file\fR\|(3), \fBBIO_s_mem\fR\|(3),
\&\fBBIO_s_null\fR\|(3), \fBBIO_s_socket\fR\|(3),
\&\fBBIO_set_callback\fR\|(3),
\&\fBBIO_should_retry\fR\|(3)
.SH "COPYRIGHT"
.IX Header "COPYRIGHT"
Copyright 2000\-2019 The OpenSSL Project Authors. All Rights Reserved.
.PP
Licensed under the OpenSSL license (the \*(L"License\*(R"). You may not use
this file except in compliance with the License. You can obtain a copy
in the file \s-1LICENSE\s0 in the source distribution or at
<https://www.openssl.org/source/license.html>.

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.\" Automatically generated by Pod::Man 4.14 (Pod::Simple 3.42)
.\"
.\" Standard preamble:
.\" ========================================================================
.de Sp \" Vertical space (when we can't use .PP)
.if t .sp .5v
.if n .sp
..
.de Vb \" Begin verbatim text
.ft CW
.nf
.ne \\$1
..
.de Ve \" End verbatim text
.ft R
.fi
..
.\" Set up some character translations and predefined strings. \*(-- will
.\" give an unbreakable dash, \*(PI will give pi, \*(L" will give a left
.\" double quote, and \*(R" will give a right double quote. \*(C+ will
.\" give a nicer C++. Capital omega is used to do unbreakable dashes and
.\" therefore won't be available. \*(C` and \*(C' expand to `' in nroff,
.\" nothing in troff, for use with C<>.
.tr \(*W-
.ds C+ C\v'-.1v'\h'-1p'\s-2+\h'-1p'+\s0\v'.1v'\h'-1p'
.ie n \{\
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. if (\n(.H=4u)&(1m=24u) .ds -- \(*W\h'-12u'\(*W\h'-12u'-\" diablo 10 pitch
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. ds L" ""
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'br\}
.el\{\
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.\"
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.el .ds Aq '
.\"
.\" If the F register is >0, we'll generate index entries on stderr for
.\" titles (.TH), headers (.SH), subsections (.SS), items (.Ip), and index
.\" entries marked with X<> in POD. Of course, you'll have to process the
.\" output yourself in some meaningful fashion.
.\"
.\" Avoid warning from groff about undefined register 'F'.
.de IX
..
.nr rF 0
.if \n(.g .if rF .nr rF 1
.if (\n(rF:(\n(.g==0)) \{\
. if \nF \{\
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..
. if !\nF==2 \{\
. nr % 0
. nr F 2
. \}
. \}
.\}
.rr rF
.\"
.\" Accent mark definitions (@(#)ms.acc 1.5 88/02/08 SMI; from UCB 4.2).
.\" Fear. Run. Save yourself. No user-serviceable parts.
. \" fudge factors for nroff and troff
.if n \{\
. ds #H 0
. ds #V .8m
. ds #F .3m
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.ds th \*(#[\v'.3m'\s+1I\s-1\v'-.3m'\h'-(\w'I'u*2/3)'\s-1o\s+1\*(#]
.ds Th \*(#[\s+2I\s-2\h'-\w'I'u*3/5'\v'-.3m'o\v'.3m'\*(#]
.ds ae a\h'-(\w'a'u*4/10)'e
.ds Ae A\h'-(\w'A'u*4/10)'E
. \" corrections for vroff
.if v .ds ~ \\k:\h'-(\\n(.wu*9/10-\*(#H)'\s-2\u~\d\s+2\h'|\\n:u'
.if v .ds ^ \\k:\h'-(\\n(.wu*10/11-\*(#H)'\v'-.4m'^\v'.4m'\h'|\\n:u'
. \" for low resolution devices (crt and lpr)
.if \n(.H>23 .if \n(.V>19 \
\{\
. ds : e
. ds 8 ss
. ds o a
. ds d- d\h'-1'\(ga
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. ds th \o'bp'
. ds Th \o'LP'
. ds ae ae
. ds Ae AE
.\}
.rm #[ #] #H #V #F C
.\" ========================================================================
.\"
.IX Title "CRYPTO 7"
.TH CRYPTO 7 "2020-04-21" "1.1.1g" "OpenSSL"
.\" For nroff, turn off justification. Always turn off hyphenation; it makes
.\" way too many mistakes in technical documents.
.if n .ad l
.nh
.SH "NAME"
crypto \- OpenSSL cryptographic library
.SH "SYNOPSIS"
.IX Header "SYNOPSIS"
See the individual manual pages for details.
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
The OpenSSL \fBcrypto\fR library implements a wide range of cryptographic
algorithms used in various Internet standards. The services provided
by this library are used by the OpenSSL implementations of \s-1SSL, TLS\s0
and S/MIME, and they have also been used to implement \s-1SSH,\s0 OpenPGP, and
other cryptographic standards.
.PP
\&\fBlibcrypto\fR consists of a number of sub-libraries that implement the
individual algorithms.
.PP
The functionality includes symmetric encryption, public key
cryptography and key agreement, certificate handling, cryptographic
hash functions, cryptographic pseudo-random number generator, and
various utilities.
.SH "NOTES"
.IX Header "NOTES"
Some of the newer functions follow a naming convention using the numbers
\&\fB0\fR and \fB1\fR. For example the functions:
.PP
.Vb 2
\& int X509_CRL_add0_revoked(X509_CRL *crl, X509_REVOKED *rev);
\& int X509_add1_trust_object(X509 *x, const ASN1_OBJECT *obj);
.Ve
.PP
The \fB0\fR version uses the supplied structure pointer directly
in the parent and it will be freed up when the parent is freed.
In the above example \fBcrl\fR would be freed but \fBrev\fR would not.
.PP
The \fB1\fR function uses a copy of the supplied structure pointer
(or in some cases increases its link count) in the parent and
so both (\fBx\fR and \fBobj\fR above) should be freed up.
.SH "RETURN VALUES"
.IX Header "RETURN VALUES"
See the individual manual pages for details.
.SH "SEE ALSO"
.IX Header "SEE ALSO"
\&\fBopenssl\fR\|(1), \fBssl\fR\|(7)
.SH "COPYRIGHT"
.IX Header "COPYRIGHT"
Copyright 2000\-2016 The OpenSSL Project Authors. All Rights Reserved.
.PP
Licensed under the OpenSSL license (the \*(L"License\*(R"). You may not use
this file except in compliance with the License. You can obtain a copy
in the file \s-1LICENSE\s0 in the source distribution or at
<https://www.openssl.org/source/license.html>.

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.\" Automatically generated by Pod::Man 4.14 (Pod::Simple 3.42)
.\"
.\" Standard preamble:
.\" ========================================================================
.de Sp \" Vertical space (when we can't use .PP)
.if t .sp .5v
.if n .sp
..
.de Vb \" Begin verbatim text
.ft CW
.nf
.ne \\$1
..
.de Ve \" End verbatim text
.ft R
.fi
..
.\" Set up some character translations and predefined strings. \*(-- will
.\" give an unbreakable dash, \*(PI will give pi, \*(L" will give a left
.\" double quote, and \*(R" will give a right double quote. \*(C+ will
.\" give a nicer C++. Capital omega is used to do unbreakable dashes and
.\" therefore won't be available. \*(C` and \*(C' expand to `' in nroff,
.\" nothing in troff, for use with C<>.
.tr \(*W-
.ds C+ C\v'-.1v'\h'-1p'\s-2+\h'-1p'+\s0\v'.1v'\h'-1p'
.ie n \{\
. ds -- \(*W-
. ds PI pi
. if (\n(.H=4u)&(1m=24u) .ds -- \(*W\h'-12u'\(*W\h'-12u'-\" diablo 10 pitch
. if (\n(.H=4u)&(1m=20u) .ds -- \(*W\h'-12u'\(*W\h'-8u'-\" diablo 12 pitch
. ds L" ""
. ds R" ""
. ds C` ""
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'br\}
.el\{\
. ds -- \|\(em\|
. ds PI \(*p
. ds L" ``
. ds R" ''
. ds C`
. ds C'
'br\}
.\"
.\" Escape single quotes in literal strings from groff's Unicode transform.
.ie \n(.g .ds Aq \(aq
.el .ds Aq '
.\"
.\" If the F register is >0, we'll generate index entries on stderr for
.\" titles (.TH), headers (.SH), subsections (.SS), items (.Ip), and index
.\" entries marked with X<> in POD. Of course, you'll have to process the
.\" output yourself in some meaningful fashion.
.\"
.\" Avoid warning from groff about undefined register 'F'.
.de IX
..
.nr rF 0
.if \n(.g .if rF .nr rF 1
.if (\n(rF:(\n(.g==0)) \{\
. if \nF \{\
. de IX
. tm Index:\\$1\t\\n%\t"\\$2"
..
. if !\nF==2 \{\
. nr % 0
. nr F 2
. \}
. \}
.\}
.rr rF
.\"
.\" Accent mark definitions (@(#)ms.acc 1.5 88/02/08 SMI; from UCB 4.2).
.\" Fear. Run. Save yourself. No user-serviceable parts.
. \" fudge factors for nroff and troff
.if n \{\
. ds #H 0
. ds #V .8m
. ds #F .3m
. ds #[ \f1
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.ds : \\k:\h'-(\\n(.wu*8/10-\*(#H+.1m+\*(#F)'\v'-\*(#V'\z.\h'.2m+\*(#F'.\h'|\\n:u'\v'\*(#V'
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.ds Th \*(#[\s+2I\s-2\h'-\w'I'u*3/5'\v'-.3m'o\v'.3m'\*(#]
.ds ae a\h'-(\w'a'u*4/10)'e
.ds Ae A\h'-(\w'A'u*4/10)'E
. \" corrections for vroff
.if v .ds ~ \\k:\h'-(\\n(.wu*9/10-\*(#H)'\s-2\u~\d\s+2\h'|\\n:u'
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.if \n(.H>23 .if \n(.V>19 \
\{\
. ds : e
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. ds Ae AE
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.rm #[ #] #H #V #F C
.\" ========================================================================
.\"
.IX Title "CT 7"
.TH CT 7 "2020-04-21" "1.1.1g" "OpenSSL"
.\" For nroff, turn off justification. Always turn off hyphenation; it makes
.\" way too many mistakes in technical documents.
.if n .ad l
.nh
.SH "NAME"
ct \- Certificate Transparency
.SH "SYNOPSIS"
.IX Header "SYNOPSIS"
.Vb 1
\& #include <openssl/ct.h>
.Ve
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
This library implements Certificate Transparency (\s-1CT\s0) verification for \s-1TLS\s0
clients, as defined in \s-1RFC 6962.\s0 This verification can provide some confidence
that a certificate has been publicly logged in a set of \s-1CT\s0 logs.
.PP
By default, these checks are disabled. They can be enabled using
\&\fBSSL_CTX_enable_ct\fR\|(3) or \fBSSL_enable_ct\fR\|(3).
.PP
This library can also be used to parse and examine \s-1CT\s0 data structures, such as
Signed Certificate Timestamps (SCTs), or to read a list of \s-1CT\s0 logs. There are
functions for:
\&\- decoding and encoding SCTs in \s-1DER\s0 and \s-1TLS\s0 wire format.
\&\- printing SCTs.
\&\- verifying the authenticity of SCTs.
\&\- loading a \s-1CT\s0 log list from a \s-1CONF\s0 file.
.SH "SEE ALSO"
.IX Header "SEE ALSO"
\&\fBd2i_SCT_LIST\fR\|(3),
\&\fBCTLOG_STORE_new\fR\|(3),
\&\fBCTLOG_STORE_get0_log_by_id\fR\|(3),
\&\fBSCT_new\fR\|(3),
\&\fBSCT_print\fR\|(3),
\&\fBSCT_validate\fR\|(3),
\&\fBSCT_validate\fR\|(3),
\&\fBCT_POLICY_EVAL_CTX_new\fR\|(3),
\&\fBSSL_CTX_set_ct_validation_callback\fR\|(3)
.SH "HISTORY"
.IX Header "HISTORY"
The ct library was added in OpenSSL 1.1.0.
.SH "COPYRIGHT"
.IX Header "COPYRIGHT"
Copyright 2016\-2017 The OpenSSL Project Authors. All Rights Reserved.
.PP
Licensed under the OpenSSL license (the \*(L"License\*(R"). You may not use
this file except in compliance with the License. You can obtain a copy
in the file \s-1LICENSE\s0 in the source distribution or at
<https://www.openssl.org/source/license.html>.

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.\" Automatically generated by Pod::Man 4.14 (Pod::Simple 3.42)
.\"
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.\" ========================================================================
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..
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..
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.ft R
.fi
..
.\" Set up some character translations and predefined strings. \*(-- will
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.\" nothing in troff, for use with C<>.
.tr \(*W-
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'br\}
.el\{\
. ds -- \|\(em\|
. ds PI \(*p
. ds L" ``
. ds R" ''
. ds C`
. ds C'
'br\}
.\"
.\" Escape single quotes in literal strings from groff's Unicode transform.
.ie \n(.g .ds Aq \(aq
.el .ds Aq '
.\"
.\" If the F register is >0, we'll generate index entries on stderr for
.\" titles (.TH), headers (.SH), subsections (.SS), items (.Ip), and index
.\" entries marked with X<> in POD. Of course, you'll have to process the
.\" output yourself in some meaningful fashion.
.\"
.\" Avoid warning from groff about undefined register 'F'.
.de IX
..
.nr rF 0
.if \n(.g .if rF .nr rF 1
.if (\n(rF:(\n(.g==0)) \{\
. if \nF \{\
. de IX
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..
. if !\nF==2 \{\
. nr % 0
. nr F 2
. \}
. \}
.\}
.rr rF
.\"
.\" Accent mark definitions (@(#)ms.acc 1.5 88/02/08 SMI; from UCB 4.2).
.\" Fear. Run. Save yourself. No user-serviceable parts.
. \" fudge factors for nroff and troff
.if n \{\
. ds #H 0
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. ds #F .3m
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.ds Ae A\h'-(\w'A'u*4/10)'E
. \" corrections for vroff
.if v .ds ~ \\k:\h'-(\\n(.wu*9/10-\*(#H)'\s-2\u~\d\s+2\h'|\\n:u'
.if v .ds ^ \\k:\h'-(\\n(.wu*10/11-\*(#H)'\v'-.4m'^\v'.4m'\h'|\\n:u'
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\{\
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.rm #[ #] #H #V #F C
.\" ========================================================================
.\"
.IX Title "DES_MODES 7"
.TH DES_MODES 7 "2020-04-21" "1.1.1g" "OpenSSL"
.\" For nroff, turn off justification. Always turn off hyphenation; it makes
.\" way too many mistakes in technical documents.
.if n .ad l
.nh
.SH "NAME"
des_modes \- the variants of DES and other crypto algorithms of OpenSSL
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
Several crypto algorithms for OpenSSL can be used in a number of modes. Those
are used for using block ciphers in a way similar to stream ciphers, among
other things.
.SH "OVERVIEW"
.IX Header "OVERVIEW"
.SS "Electronic Codebook Mode (\s-1ECB\s0)"
.IX Subsection "Electronic Codebook Mode (ECB)"
Normally, this is found as the function \fIalgorithm\fR\fB_ecb_encrypt()\fR.
.IP "\(bu" 2
64 bits are enciphered at a time.
.IP "\(bu" 2
The order of the blocks can be rearranged without detection.
.IP "\(bu" 2
The same plaintext block always produces the same ciphertext block
(for the same key) making it vulnerable to a 'dictionary attack'.
.IP "\(bu" 2
An error will only affect one ciphertext block.
.SS "Cipher Block Chaining Mode (\s-1CBC\s0)"
.IX Subsection "Cipher Block Chaining Mode (CBC)"
Normally, this is found as the function \fIalgorithm\fR\fB_cbc_encrypt()\fR.
Be aware that \fBdes_cbc_encrypt()\fR is not really \s-1DES CBC\s0 (it does
not update the \s-1IV\s0); use \fBdes_ncbc_encrypt()\fR instead.
.IP "\(bu" 2
a multiple of 64 bits are enciphered at a time.
.IP "\(bu" 2
The \s-1CBC\s0 mode produces the same ciphertext whenever the same
plaintext is encrypted using the same key and starting variable.
.IP "\(bu" 2
The chaining operation makes the ciphertext blocks dependent on the
current and all preceding plaintext blocks and therefore blocks can not
be rearranged.
.IP "\(bu" 2
The use of different starting variables prevents the same plaintext
enciphering to the same ciphertext.
.IP "\(bu" 2
An error will affect the current and the following ciphertext blocks.
.SS "Cipher Feedback Mode (\s-1CFB\s0)"
.IX Subsection "Cipher Feedback Mode (CFB)"
Normally, this is found as the function \fIalgorithm\fR\fB_cfb_encrypt()\fR.
.IP "\(bu" 2
a number of bits (j) <= 64 are enciphered at a time.
.IP "\(bu" 2
The \s-1CFB\s0 mode produces the same ciphertext whenever the same
plaintext is encrypted using the same key and starting variable.
.IP "\(bu" 2
The chaining operation makes the ciphertext variables dependent on the
current and all preceding variables and therefore j\-bit variables are
chained together and can not be rearranged.
.IP "\(bu" 2
The use of different starting variables prevents the same plaintext
enciphering to the same ciphertext.
.IP "\(bu" 2
The strength of the \s-1CFB\s0 mode depends on the size of k (maximal if
j == k). In my implementation this is always the case.
.IP "\(bu" 2
Selection of a small value for j will require more cycles through
the encipherment algorithm per unit of plaintext and thus cause
greater processing overheads.
.IP "\(bu" 2
Only multiples of j bits can be enciphered.
.IP "\(bu" 2
An error will affect the current and the following ciphertext variables.
.SS "Output Feedback Mode (\s-1OFB\s0)"
.IX Subsection "Output Feedback Mode (OFB)"
Normally, this is found as the function \fIalgorithm\fR\fB_ofb_encrypt()\fR.
.IP "\(bu" 2
a number of bits (j) <= 64 are enciphered at a time.
.IP "\(bu" 2
The \s-1OFB\s0 mode produces the same ciphertext whenever the same
plaintext enciphered using the same key and starting variable. More
over, in the \s-1OFB\s0 mode the same key stream is produced when the same
key and start variable are used. Consequently, for security reasons
a specific start variable should be used only once for a given key.
.IP "\(bu" 2
The absence of chaining makes the \s-1OFB\s0 more vulnerable to specific attacks.
.IP "\(bu" 2
The use of different start variables values prevents the same
plaintext enciphering to the same ciphertext, by producing different
key streams.
.IP "\(bu" 2
Selection of a small value for j will require more cycles through
the encipherment algorithm per unit of plaintext and thus cause
greater processing overheads.
.IP "\(bu" 2
Only multiples of j bits can be enciphered.
.IP "\(bu" 2
\&\s-1OFB\s0 mode of operation does not extend ciphertext errors in the
resultant plaintext output. Every bit error in the ciphertext causes
only one bit to be in error in the deciphered plaintext.
.IP "\(bu" 2
\&\s-1OFB\s0 mode is not self-synchronizing. If the two operation of
encipherment and decipherment get out of synchronism, the system needs
to be re-initialized.
.IP "\(bu" 2
Each re-initialization should use a value of the start variable
different from the start variable values used before with the same
key. The reason for this is that an identical bit stream would be
produced each time from the same parameters. This would be
susceptible to a 'known plaintext' attack.
.SS "Triple \s-1ECB\s0 Mode"
.IX Subsection "Triple ECB Mode"
Normally, this is found as the function \fIalgorithm\fR\fB_ecb3_encrypt()\fR.
.IP "\(bu" 2
Encrypt with key1, decrypt with key2 and encrypt with key3 again.
.IP "\(bu" 2
As for \s-1ECB\s0 encryption but increases the key length to 168 bits.
There are theoretic attacks that can be used that make the effective
key length 112 bits, but this attack also requires 2^56 blocks of
memory, not very likely, even for the \s-1NSA.\s0
.IP "\(bu" 2
If both keys are the same it is equivalent to encrypting once with
just one key.
.IP "\(bu" 2
If the first and last key are the same, the key length is 112 bits.
There are attacks that could reduce the effective key strength
to only slightly more than 56 bits, but these require a lot of memory.
.IP "\(bu" 2
If all 3 keys are the same, this is effectively the same as normal
ecb mode.
.SS "Triple \s-1CBC\s0 Mode"
.IX Subsection "Triple CBC Mode"
Normally, this is found as the function \fIalgorithm\fR\fB_ede3_cbc_encrypt()\fR.
.IP "\(bu" 2
Encrypt with key1, decrypt with key2 and then encrypt with key3.
.IP "\(bu" 2
As for \s-1CBC\s0 encryption but increases the key length to 168 bits with
the same restrictions as for triple ecb mode.
.SH "NOTES"
.IX Header "NOTES"
This text was been written in large parts by Eric Young in his original
documentation for SSLeay, the predecessor of OpenSSL. In turn, he attributed
it to:
.PP
.Vb 5
\& AS 2805.5.2
\& Australian Standard
\& Electronic funds transfer \- Requirements for interfaces,
\& Part 5.2: Modes of operation for an n\-bit block cipher algorithm
\& Appendix A
.Ve
.SH "SEE ALSO"
.IX Header "SEE ALSO"
\&\fBBF_encrypt\fR\|(3), \fBDES_crypt\fR\|(3)
.SH "COPYRIGHT"
.IX Header "COPYRIGHT"
Copyright 2000\-2017 The OpenSSL Project Authors. All Rights Reserved.
.PP
Licensed under the OpenSSL license (the \*(L"License\*(R"). You may not use
this file except in compliance with the License. You can obtain a copy
in the file \s-1LICENSE\s0 in the source distribution or at
<https://www.openssl.org/source/license.html>.

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.\" Automatically generated by Pod::Man 4.14 (Pod::Simple 3.42)
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.\"
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.rm #[ #] #H #V #F C
.\" ========================================================================
.\"
.IX Title "EVP 7"
.TH EVP 7 "2020-04-21" "1.1.1g" "OpenSSL"
.\" For nroff, turn off justification. Always turn off hyphenation; it makes
.\" way too many mistakes in technical documents.
.if n .ad l
.nh
.SH "NAME"
evp \- high\-level cryptographic functions
.SH "SYNOPSIS"
.IX Header "SYNOPSIS"
.Vb 1
\& #include <openssl/evp.h>
.Ve
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
The \s-1EVP\s0 library provides a high-level interface to cryptographic
functions.
.PP
The \fBEVP_Seal\fR\fI\s-1XXX\s0\fR and \fBEVP_Open\fR\fI\s-1XXX\s0\fR
functions provide public key encryption and decryption to implement digital \*(L"envelopes\*(R".
.PP
The \fBEVP_DigestSign\fR\fI\s-1XXX\s0\fR and
\&\fBEVP_DigestVerify\fR\fI\s-1XXX\s0\fR functions implement
digital signatures and Message Authentication Codes (MACs). Also see the older
\&\fBEVP_Sign\fR\fI\s-1XXX\s0\fR and \fBEVP_Verify\fR\fI\s-1XXX\s0\fR
functions.
.PP
Symmetric encryption is available with the \fBEVP_Encrypt\fR\fI\s-1XXX\s0\fR
functions. The \fBEVP_Digest\fR\fI\s-1XXX\s0\fR functions provide message digests.
.PP
The \fB\s-1EVP_PKEY\s0\fR\fI\s-1XXX\s0\fR functions provide a high level interface to
asymmetric algorithms. To create a new \s-1EVP_PKEY\s0 see
\&\fBEVP_PKEY_new\fR\|(3). EVP_PKEYs can be associated
with a private key of a particular algorithm by using the functions
described on the \fBEVP_PKEY_set1_RSA\fR\|(3) page, or
new keys can be generated using \fBEVP_PKEY_keygen\fR\|(3).
EVP_PKEYs can be compared using \fBEVP_PKEY_cmp\fR\|(3), or printed using
\&\fBEVP_PKEY_print_private\fR\|(3).
.PP
The \s-1EVP_PKEY\s0 functions support the full range of asymmetric algorithm operations:
.IP "For key agreement see \fBEVP_PKEY_derive\fR\|(3)" 4
.IX Item "For key agreement see EVP_PKEY_derive"
.PD 0
.IP "For signing and verifying see \fBEVP_PKEY_sign\fR\|(3), \fBEVP_PKEY_verify\fR\|(3) and \fBEVP_PKEY_verify_recover\fR\|(3). However, note that these functions do not perform a digest of the data to be signed. Therefore normally you would use the \fBEVP_DigestSignInit\fR\|(3) functions for this purpose." 4
.IX Item "For signing and verifying see EVP_PKEY_sign, EVP_PKEY_verify and EVP_PKEY_verify_recover. However, note that these functions do not perform a digest of the data to be signed. Therefore normally you would use the EVP_DigestSignInit functions for this purpose."
.ie n .IP "For encryption and decryption see \fBEVP_PKEY_encrypt\fR\|(3) and \fBEVP_PKEY_decrypt\fR\|(3) respectively. However, note that these functions perform encryption and decryption only. As public key encryption is an expensive operation, normally you would wrap an encrypted message in a ""digital envelope"" using the \fBEVP_SealInit\fR\|(3) and \fBEVP_OpenInit\fR\|(3) functions." 4
.el .IP "For encryption and decryption see \fBEVP_PKEY_encrypt\fR\|(3) and \fBEVP_PKEY_decrypt\fR\|(3) respectively. However, note that these functions perform encryption and decryption only. As public key encryption is an expensive operation, normally you would wrap an encrypted message in a ``digital envelope'' using the \fBEVP_SealInit\fR\|(3) and \fBEVP_OpenInit\fR\|(3) functions." 4
.IX Item "For encryption and decryption see EVP_PKEY_encrypt and EVP_PKEY_decrypt respectively. However, note that these functions perform encryption and decryption only. As public key encryption is an expensive operation, normally you would wrap an encrypted message in a digital envelope using the EVP_SealInit and EVP_OpenInit functions."
.PD
.PP
The \fBEVP_BytesToKey\fR\|(3) function provides some limited support for password
based encryption. Careful selection of the parameters will provide a PKCS#5 \s-1PBKDF1\s0 compatible
implementation. However, new applications should not typically use this (preferring, for example,
\&\s-1PBKDF2\s0 from PCKS#5).
.PP
The \fBEVP_Encode\fR\fI\s-1XXX\s0\fR and
\&\fBEVP_Decode\fR\fI\s-1XXX\s0\fR functions implement base 64 encoding
and decoding.
.PP
All the symmetric algorithms (ciphers), digests and asymmetric algorithms
(public key algorithms) can be replaced by \s-1ENGINE\s0 modules providing alternative
implementations. If \s-1ENGINE\s0 implementations of ciphers or digests are registered
as defaults, then the various \s-1EVP\s0 functions will automatically use those
implementations automatically in preference to built in software
implementations. For more information, consult the \fBengine\fR\|(3) man page.
.PP
Although low level algorithm specific functions exist for many algorithms
their use is discouraged. They cannot be used with an \s-1ENGINE\s0 and \s-1ENGINE\s0
versions of new algorithms cannot be accessed using the low level functions.
Also makes code harder to adapt to new algorithms and some options are not
cleanly supported at the low level and some operations are more efficient
using the high level interface.
.SH "SEE ALSO"
.IX Header "SEE ALSO"
\&\fBEVP_DigestInit\fR\|(3),
\&\fBEVP_EncryptInit\fR\|(3),
\&\fBEVP_OpenInit\fR\|(3),
\&\fBEVP_SealInit\fR\|(3),
\&\fBEVP_DigestSignInit\fR\|(3),
\&\fBEVP_SignInit\fR\|(3),
\&\fBEVP_VerifyInit\fR\|(3),
\&\fBEVP_EncodeInit\fR\|(3),
\&\fBEVP_PKEY_new\fR\|(3),
\&\fBEVP_PKEY_set1_RSA\fR\|(3),
\&\fBEVP_PKEY_keygen\fR\|(3),
\&\fBEVP_PKEY_print_private\fR\|(3),
\&\fBEVP_PKEY_decrypt\fR\|(3),
\&\fBEVP_PKEY_encrypt\fR\|(3),
\&\fBEVP_PKEY_sign\fR\|(3),
\&\fBEVP_PKEY_verify\fR\|(3),
\&\fBEVP_PKEY_verify_recover\fR\|(3),
\&\fBEVP_PKEY_derive\fR\|(3),
\&\fBEVP_BytesToKey\fR\|(3),
\&\fBENGINE_by_id\fR\|(3)
.SH "COPYRIGHT"
.IX Header "COPYRIGHT"
Copyright 2000\-2018 The OpenSSL Project Authors. All Rights Reserved.
.PP
Licensed under the OpenSSL license (the \*(L"License\*(R"). You may not use
this file except in compliance with the License. You can obtain a copy
in the file \s-1LICENSE\s0 in the source distribution or at
<https://www.openssl.org/source/license.html>.

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.\" Automatically generated by Pod::Man 4.14 (Pod::Simple 3.42)
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.ds ae a\h'-(\w'a'u*4/10)'e
.ds Ae A\h'-(\w'A'u*4/10)'E
. \" corrections for vroff
.if v .ds ~ \\k:\h'-(\\n(.wu*9/10-\*(#H)'\s-2\u~\d\s+2\h'|\\n:u'
.if v .ds ^ \\k:\h'-(\\n(.wu*10/11-\*(#H)'\v'-.4m'^\v'.4m'\h'|\\n:u'
. \" for low resolution devices (crt and lpr)
.if \n(.H>23 .if \n(.V>19 \
\{\
. ds : e
. ds 8 ss
. ds o a
. ds d- d\h'-1'\(ga
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. ds th \o'bp'
. ds Th \o'LP'
. ds ae ae
. ds Ae AE
.\}
.rm #[ #] #H #V #F C
.\" ========================================================================
.\"
.IX Title "OSSL_STORE-FILE 7"
.TH OSSL_STORE-FILE 7 "2020-04-21" "1.1.1g" "OpenSSL"
.\" For nroff, turn off justification. Always turn off hyphenation; it makes
.\" way too many mistakes in technical documents.
.if n .ad l
.nh
.SH "NAME"
ossl_store\-file \- The store 'file' scheme loader
.SH "SYNOPSIS"
.IX Header "SYNOPSIS"
#include <openssl/store.h>
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
Support for the 'file' scheme is built into \f(CW\*(C`libcrypto\*(C'\fR.
Since files come in all kinds of formats and content types, the 'file'
scheme has its own layer of functionality called \*(L"file handlers\*(R",
which are used to try to decode diverse types of file contents.
.PP
In case a file is formatted as \s-1PEM,\s0 each called file handler receives
the \s-1PEM\s0 name (everything following any '\f(CW\*(C`\-\-\-\-\-BEGIN \*(C'\fR') as well as
possible \s-1PEM\s0 headers, together with the decoded \s-1PEM\s0 body. Since \s-1PEM\s0
formatted files can contain more than one object, the file handlers
are called upon for each such object.
.PP
If the file isn't determined to be formatted as \s-1PEM,\s0 the content is
loaded in raw form in its entirety and passed to the available file
handlers as is, with no \s-1PEM\s0 name or headers.
.PP
Each file handler is expected to handle \s-1PEM\s0 and non-PEM content as
appropriate. Some may refuse non-PEM content for the sake of
determinism (for example, there are keys out in the wild that are
represented as an \s-1ASN.1 OCTET STRING.\s0 In raw form, it's not easily
possible to distinguish those from any other data coming as an \s-1ASN.1
OCTET STRING,\s0 so such keys would naturally be accepted as \s-1PEM\s0 files
only).
.SH "NOTES"
.IX Header "NOTES"
When needed, the 'file' scheme loader will require a pass phrase by
using the \f(CW\*(C`UI_METHOD\*(C'\fR that was passed via \fBOSSL_STORE_open()\fR.
This pass phrase is expected to be \s-1UTF\-8\s0 encoded, anything else will
give an undefined result.
The files made accessible through this loader are expected to be
standard compliant with regards to pass phrase encoding.
Files that aren't should be re-generated with a correctly encoded pass
phrase.
See \fBpassphrase\-encoding\fR\|(7) for more information.
.SH "SEE ALSO"
.IX Header "SEE ALSO"
\&\fBossl_store\fR\|(7), \fBpassphrase\-encoding\fR\|(7)
.SH "COPYRIGHT"
.IX Header "COPYRIGHT"
Copyright 2018 The OpenSSL Project Authors. All Rights Reserved.
.PP
Licensed under the OpenSSL license (the \*(L"License\*(R"). You may not use
this file except in compliance with the License. You can obtain a copy
in the file \s-1LICENSE\s0 in the source distribution or at
<https://www.openssl.org/source/license.html>.

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.\"
.\" If the F register is >0, we'll generate index entries on stderr for
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.\" entries marked with X<> in POD. Of course, you'll have to process the
.\" output yourself in some meaningful fashion.
.\"
.\" Avoid warning from groff about undefined register 'F'.
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.\" Accent mark definitions (@(#)ms.acc 1.5 88/02/08 SMI; from UCB 4.2).
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.ds Th \*(#[\s+2I\s-2\h'-\w'I'u*3/5'\v'-.3m'o\v'.3m'\*(#]
.ds ae a\h'-(\w'a'u*4/10)'e
.ds Ae A\h'-(\w'A'u*4/10)'E
. \" corrections for vroff
.if v .ds ~ \\k:\h'-(\\n(.wu*9/10-\*(#H)'\s-2\u~\d\s+2\h'|\\n:u'
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. \" for low resolution devices (crt and lpr)
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\{\
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. ds th \o'bp'
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. ds ae ae
. ds Ae AE
.\}
.rm #[ #] #H #V #F C
.\" ========================================================================
.\"
.IX Title "OSSL_STORE 7"
.TH OSSL_STORE 7 "2020-04-21" "1.1.1g" "OpenSSL"
.\" For nroff, turn off justification. Always turn off hyphenation; it makes
.\" way too many mistakes in technical documents.
.if n .ad l
.nh
.SH "NAME"
ossl_store \- Store retrieval functions
.SH "SYNOPSIS"
.IX Header "SYNOPSIS"
#include <openssl/store.h>
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
.SS "General"
.IX Subsection "General"
A \s-1STORE\s0 is a layer of functionality to retrieve a number of supported
objects from a repository of any kind, addressable as a file name or
as a \s-1URI.\s0
.PP
The functionality supports the pattern \*(L"open a channel to the
repository\*(R", \*(L"loop and retrieve one object at a time\*(R", and \*(L"finish up
by closing the channel\*(R".
.PP
The retrieved objects are returned as a wrapper type \fB\s-1OSSL_STORE_INFO\s0\fR,
from which an OpenSSL type can be retrieved.
.SS "\s-1URI\s0 schemes and loaders"
.IX Subsection "URI schemes and loaders"
Support for a \s-1URI\s0 scheme is called a \s-1STORE\s0 \*(L"loader\*(R", and can be added
dynamically from the calling application or from a loadable engine.
.PP
Support for the 'file' scheme is built into \f(CW\*(C`libcrypto\*(C'\fR.
See \fBossl_store\-file\fR\|(7) for more information.
.SS "\s-1UI_METHOD\s0 and pass phrases"
.IX Subsection "UI_METHOD and pass phrases"
The \fB\s-1OSS_STORE\s0\fR \s-1API\s0 does nothing to enforce any specific format or
encoding on the pass phrase that the \fB\s-1UI_METHOD\s0\fR provides. However,
the pass phrase is expected to be \s-1UTF\-8\s0 encoded. The result of any
other encoding is undefined.
.SH "EXAMPLES"
.IX Header "EXAMPLES"
.SS "A generic call"
.IX Subsection "A generic call"
.Vb 1
\& OSSL_STORE_CTX *ctx = OSSL_STORE_open("file:/foo/bar/data.pem");
\&
\& /*
\& * OSSL_STORE_eof() simulates file semantics for any repository to signal
\& * that no more data can be expected
\& */
\& while (!OSSL_STORE_eof(ctx)) {
\& OSSL_STORE_INFO *info = OSSL_STORE_load(ctx);
\&
\& /*
\& * Do whatever is necessary with the OSSL_STORE_INFO,
\& * here just one example
\& */
\& switch (OSSL_STORE_INFO_get_type(info)) {
\& case OSSL_STORE_INFO_X509:
\& /* Print the X.509 certificate text */
\& X509_print_fp(stdout, OSSL_STORE_INFO_get0_CERT(info));
\& /* Print the X.509 certificate PEM output */
\& PEM_write_X509(stdout, OSSL_STORE_INFO_get0_CERT(info));
\& break;
\& }
\& }
\&
\& OSSL_STORE_close(ctx);
.Ve
.SH "SEE ALSO"
.IX Header "SEE ALSO"
\&\s-1\fBOSSL_STORE_INFO\s0\fR\|(3), \s-1\fBOSSL_STORE_LOADER\s0\fR\|(3),
\&\fBOSSL_STORE_open\fR\|(3), \fBOSSL_STORE_expect\fR\|(3),
\&\s-1\fBOSSL_STORE_SEARCH\s0\fR\|(3)
.SH "COPYRIGHT"
.IX Header "COPYRIGHT"
Copyright 2016\-2018 The OpenSSL Project Authors. All Rights Reserved.
.PP
Licensed under the OpenSSL license (the \*(L"License\*(R"). You may not use
this file except in compliance with the License. You can obtain a copy
in the file \s-1LICENSE\s0 in the source distribution or at
<https://www.openssl.org/source/license.html>.

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.\" Automatically generated by Pod::Man 4.14 (Pod::Simple 3.42)
.\"
.\" Standard preamble:
.\" ========================================================================
.de Sp \" Vertical space (when we can't use .PP)
.if t .sp .5v
.if n .sp
..
.de Vb \" Begin verbatim text
.ft CW
.nf
.ne \\$1
..
.de Ve \" End verbatim text
.ft R
.fi
..
.\" Set up some character translations and predefined strings. \*(-- will
.\" give an unbreakable dash, \*(PI will give pi, \*(L" will give a left
.\" double quote, and \*(R" will give a right double quote. \*(C+ will
.\" give a nicer C++. Capital omega is used to do unbreakable dashes and
.\" therefore won't be available. \*(C` and \*(C' expand to `' in nroff,
.\" nothing in troff, for use with C<>.
.tr \(*W-
.ds C+ C\v'-.1v'\h'-1p'\s-2+\h'-1p'+\s0\v'.1v'\h'-1p'
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'br\}
.el\{\
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.\"
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.ie \n(.g .ds Aq \(aq
.el .ds Aq '
.\"
.\" If the F register is >0, we'll generate index entries on stderr for
.\" titles (.TH), headers (.SH), subsections (.SS), items (.Ip), and index
.\" entries marked with X<> in POD. Of course, you'll have to process the
.\" output yourself in some meaningful fashion.
.\"
.\" Avoid warning from groff about undefined register 'F'.
.de IX
..
.nr rF 0
.if \n(.g .if rF .nr rF 1
.if (\n(rF:(\n(.g==0)) \{\
. if \nF \{\
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..
. if !\nF==2 \{\
. nr % 0
. nr F 2
. \}
. \}
.\}
.rr rF
.\"
.\" Accent mark definitions (@(#)ms.acc 1.5 88/02/08 SMI; from UCB 4.2).
.\" Fear. Run. Save yourself. No user-serviceable parts.
. \" fudge factors for nroff and troff
.if n \{\
. ds #H 0
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.ds : \\k:\h'-(\\n(.wu*8/10-\*(#H+.1m+\*(#F)'\v'-\*(#V'\z.\h'.2m+\*(#F'.\h'|\\n:u'\v'\*(#V'
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.ds Th \*(#[\s+2I\s-2\h'-\w'I'u*3/5'\v'-.3m'o\v'.3m'\*(#]
.ds ae a\h'-(\w'a'u*4/10)'e
.ds Ae A\h'-(\w'A'u*4/10)'E
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.if v .ds ~ \\k:\h'-(\\n(.wu*9/10-\*(#H)'\s-2\u~\d\s+2\h'|\\n:u'
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\{\
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. ds th \o'bp'
. ds Th \o'LP'
. ds ae ae
. ds Ae AE
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.rm #[ #] #H #V #F C
.\" ========================================================================
.\"
.IX Title "PASSPHRASE-ENCODING 7"
.TH PASSPHRASE-ENCODING 7 "2020-04-21" "1.1.1g" "OpenSSL"
.\" For nroff, turn off justification. Always turn off hyphenation; it makes
.\" way too many mistakes in technical documents.
.if n .ad l
.nh
.SH "NAME"
passphrase\-encoding \&\- How diverse parts of OpenSSL treat pass phrases character encoding
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
In a modern world with all sorts of character encodings, the treatment of pass
phrases has become increasingly complex.
This manual page attempts to give an overview over how this problem is
currently addressed in different parts of the OpenSSL library.
.SS "The general case"
.IX Subsection "The general case"
The OpenSSL library doesn't treat pass phrases in any special way as a general
rule, and trusts the application or user to choose a suitable character set
and stick to that throughout the lifetime of affected objects.
This means that for an object that was encrypted using a pass phrase encoded in
\&\s-1ISO\-8859\-1,\s0 that object needs to be decrypted using a pass phrase encoded in
\&\s-1ISO\-8859\-1.\s0
Using the wrong encoding is expected to cause a decryption failure.
.SS "PKCS#12"
.IX Subsection "PKCS#12"
PKCS#12 is a bit different regarding pass phrase encoding.
The standard stipulates that the pass phrase shall be encoded as an \s-1ASN.1\s0
BMPString, which consists of the code points of the basic multilingual plane,
encoded in big endian (\s-1UCS\-2 BE\s0).
.PP
OpenSSL tries to adapt to this requirements in one of the following manners:
.IP "1." 4
Treats the received pass phrase as \s-1UTF\-8\s0 encoded and tries to re-encode it to
\&\s-1UTF\-16\s0 (which is the same as \s-1UCS\-2\s0 for characters U+0000 to U+D7FF and U+E000
to U+FFFF, but becomes an expansion for any other character), or failing that,
proceeds with step 2.
.IP "2." 4
Assumes that the pass phrase is encoded in \s-1ASCII\s0 or \s-1ISO\-8859\-1\s0 and
opportunistically prepends each byte with a zero byte to obtain the \s-1UCS\-2\s0
encoding of the characters, which it stores as a BMPString.
.Sp
Note that since there is no check of your locale, this may produce \s-1UCS\-2 /
UTF\-16\s0 characters that do not correspond to the original pass phrase characters
for other character sets, such as any \s-1ISO\-8859\-X\s0 encoding other than
\&\s-1ISO\-8859\-1\s0 (or for Windows, \s-1CP 1252\s0 with exception for the extra \*(L"graphical\*(R"
characters in the 0x80\-0x9F range).
.PP
OpenSSL versions older than 1.1.0 do variant 2 only, and that is the reason why
OpenSSL still does this, to be able to read files produced with older versions.
.PP
It should be noted that this approach isn't entirely fault free.
.PP
A pass phrase encoded in \s-1ISO\-8859\-2\s0 could very well have a sequence such as
0xC3 0xAF (which is the two characters \*(L"\s-1LATIN CAPITAL LETTER A WITH BREVE\*(R"\s0
and \*(L"\s-1LATIN CAPITAL LETTER Z WITH DOT ABOVE\*(R"\s0 in \s-1ISO\-8859\-2\s0 encoding), but would
be misinterpreted as the perfectly valid \s-1UTF\-8\s0 encoded code point U+00EF (\s-1LATIN
SMALL LETTER I WITH DIAERESIS\s0) \fIif the pass phrase doesn't contain anything that
would be invalid \s-1UTF\-8\s0\fR.
A pass phrase that contains this kind of byte sequence will give a different
outcome in OpenSSL 1.1.0 and newer than in OpenSSL older than 1.1.0.
.PP
.Vb 2
\& 0x00 0xC3 0x00 0xAF # OpenSSL older than 1.1.0
\& 0x00 0xEF # OpenSSL 1.1.0 and newer
.Ve
.PP
On the same accord, anything encoded in \s-1UTF\-8\s0 that was given to OpenSSL older
than 1.1.0 was misinterpreted as \s-1ISO\-8859\-1\s0 sequences.
.SS "\s-1OSSL_STORE\s0"
.IX Subsection "OSSL_STORE"
\&\fBossl_store\fR\|(7) acts as a general interface to access all kinds of objects,
potentially protected with a pass phrase, a \s-1PIN\s0 or something else.
This \s-1API\s0 stipulates that pass phrases should be \s-1UTF\-8\s0 encoded, and that any
other pass phrase encoding may give undefined results.
This \s-1API\s0 relies on the application to ensure \s-1UTF\-8\s0 encoding, and doesn't check
that this is the case, so what it gets, it will also pass to the underlying
loader.
.SH "RECOMMENDATIONS"
.IX Header "RECOMMENDATIONS"
This section assumes that you know what pass phrase was used for encryption,
but that it may have been encoded in a different character encoding than the
one used by your current input method.
For example, the pass phrase may have been used at a time when your default
encoding was \s-1ISO\-8859\-1\s0 (i.e. \*(L"nai\*:ve\*(R" resulting in the byte sequence 0x6E 0x61
0xEF 0x76 0x65), and you're now in an environment where your default encoding
is \s-1UTF\-8\s0 (i.e. \*(L"nai\*:ve\*(R" resulting in the byte sequence 0x6E 0x61 0xC3 0xAF 0x76
0x65).
Whenever it's mentioned that you should use a certain character encoding, it
should be understood that you either change the input method to use the
mentioned encoding when you type in your pass phrase, or use some suitable tool
to convert your pass phrase from your default encoding to the target encoding.
.PP
Also note that the sub-sections below discuss human readable pass phrases.
This is particularly relevant for PKCS#12 objects, where human readable pass
phrases are assumed.
For other objects, it's as legitimate to use any byte sequence (such as a
sequence of bytes from `/dev/urandom` that's been saved away), which makes any
character encoding discussion irrelevant; in such cases, simply use the same
byte sequence as it is.
.SS "Creating new objects"
.IX Subsection "Creating new objects"
For creating new pass phrase protected objects, make sure the pass phrase is
encoded using \s-1UTF\-8.\s0
This is default on most modern Unixes, but may involve an effort on other
platforms.
Specifically for Windows, setting the environment variable
\&\f(CW\*(C`OPENSSL_WIN32_UTF8\*(C'\fR will have anything entered on [Windows] console prompt
converted to \s-1UTF\-8\s0 (command line and separately prompted pass phrases alike).
.SS "Opening existing objects"
.IX Subsection "Opening existing objects"
For opening pass phrase protected objects where you know what character
encoding was used for the encryption pass phrase, make sure to use the same
encoding again.
.PP
For opening pass phrase protected objects where the character encoding that was
used is unknown, or where the producing application is unknown, try one of the
following:
.IP "1." 4
Try the pass phrase that you have as it is in the character encoding of your
environment.
It's possible that its byte sequence is exactly right.
.IP "2." 4
Convert the pass phrase to \s-1UTF\-8\s0 and try with the result.
Specifically with PKCS#12, this should open up any object that was created
according to the specification.
.IP "3." 4
Do a nai\*:ve (i.e. purely mathematical) \s-1ISO\-8859\-1\s0 to \s-1UTF\-8\s0 conversion and try
with the result.
This differs from the previous attempt because \s-1ISO\-8859\-1\s0 maps directly to
U+0000 to U+00FF, which other non\-UTF\-8 character sets do not.
.Sp
This also takes care of the case when a \s-1UTF\-8\s0 encoded string was used with
OpenSSL older than 1.1.0.
(for example, \f(CW\*(C`i\*:\*(C'\fR, which is 0xC3 0xAF when encoded in \s-1UTF\-8,\s0 would become 0xC3
0x83 0xC2 0xAF when re-encoded in the nai\*:ve manner.
The conversion to BMPString would then yield 0x00 0xC3 0x00 0xA4 0x00 0x00, the
erroneous/non\-compliant encoding used by OpenSSL older than 1.1.0)
.SH "SEE ALSO"
.IX Header "SEE ALSO"
\&\fBevp\fR\|(7),
\&\fBossl_store\fR\|(7),
\&\fBEVP_BytesToKey\fR\|(3), \fBEVP_DecryptInit\fR\|(3),
\&\fBPEM_do_header\fR\|(3),
\&\fBPKCS12_parse\fR\|(3), \fBPKCS12_newpass\fR\|(3),
\&\fBd2i_PKCS8PrivateKey_bio\fR\|(3)
.SH "COPYRIGHT"
.IX Header "COPYRIGHT"
Copyright 2018\-2020 The OpenSSL Project Authors. All Rights Reserved.
.PP
Licensed under the OpenSSL license (the \*(L"License\*(R"). You may not use
this file except in compliance with the License. You can obtain a copy
in the file \s-1LICENSE\s0 in the source distribution or at
<https://www.openssl.org/source/license.html>.

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.\" Automatically generated by Pod::Man 4.14 (Pod::Simple 3.42)
.\"
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.if t .sp .5v
.if n .sp
..
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.ft R
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.\" therefore won't be available. \*(C` and \*(C' expand to `' in nroff,
.\" nothing in troff, for use with C<>.
.tr \(*W-
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.\"
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.\"
.\" If the F register is >0, we'll generate index entries on stderr for
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.\" entries marked with X<> in POD. Of course, you'll have to process the
.\" output yourself in some meaningful fashion.
.\"
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. \" for low resolution devices (crt and lpr)
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\{\
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.\}
.rm #[ #] #H #V #F C
.\" ========================================================================
.\"
.IX Title "PROXY-CERTIFICATES 7"
.TH PROXY-CERTIFICATES 7 "2020-04-21" "1.1.1g" "OpenSSL"
.\" For nroff, turn off justification. Always turn off hyphenation; it makes
.\" way too many mistakes in technical documents.
.if n .ad l
.nh
.SH "NAME"
proxy\-certificates \- Proxy certificates in OpenSSL
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
Proxy certificates are defined in \s-1RFC 3820.\s0 They are used to
extend rights to some other entity (a computer process, typically, or
sometimes to the user itself). This allows the entity to perform
operations on behalf of the owner of the \s-1EE\s0 (End Entity) certificate.
.PP
The requirements for a valid proxy certificate are:
.IP "\(bu" 4
They are issued by an End Entity, either a normal \s-1EE\s0 certificate, or
another proxy certificate.
.IP "\(bu" 4
They must not have the \fBsubjectAltName\fR or \fBissuerAltName\fR
extensions.
.IP "\(bu" 4
They must have the \fBproxyCertInfo\fR extension.
.IP "\(bu" 4
They must have the subject of their issuer, with one \fBcommonName\fR
added.
.SS "Enabling proxy certificate verification"
.IX Subsection "Enabling proxy certificate verification"
OpenSSL expects applications that want to use proxy certificates to be
specially aware of them, and make that explicit. This is done by
setting an X509 verification flag:
.PP
.Vb 1
\& X509_STORE_CTX_set_flags(ctx, X509_V_FLAG_ALLOW_PROXY_CERTS);
.Ve
.PP
or
.PP
.Vb 1
\& X509_VERIFY_PARAM_set_flags(param, X509_V_FLAG_ALLOW_PROXY_CERTS);
.Ve
.PP
See \*(L"\s-1NOTES\*(R"\s0 for a discussion on this requirement.
.SS "Creating proxy certificates"
.IX Subsection "Creating proxy certificates"
Creating proxy certificates can be done using the \fBopenssl\-x509\fR\|(1)
command, with some extra extensions:
.PP
.Vb 3
\& [ v3_proxy ]
\& # A proxy certificate MUST NEVER be a CA certificate.
\& basicConstraints=CA:FALSE
\&
\& # Usual authority key ID
\& authorityKeyIdentifier=keyid,issuer:always
\&
\& # The extension which marks this certificate as a proxy
\& proxyCertInfo=critical,language:id\-ppl\-anyLanguage,pathlen:1,policy:text:AB
.Ve
.PP
It's also possible to specify the proxy extension in a separate section:
.PP
.Vb 1
\& proxyCertInfo=critical,@proxy_ext
\&
\& [ proxy_ext ]
\& language=id\-ppl\-anyLanguage
\& pathlen=0
\& policy=text:BC
.Ve
.PP
The policy value has a specific syntax, \fIsyntag\fR:\fIstring\fR, where the
\&\fIsyntag\fR determines what will be done with the string. The following
\&\fIsyntag\fRs are recognised:
.IP "\fBtext\fR" 4
.IX Item "text"
indicates that the string is a byte sequence, without any encoding:
.Sp
.Vb 1
\& policy=text:ra\*:ksmo\*:rga\*os
.Ve
.IP "\fBhex\fR" 4
.IX Item "hex"
indicates the string is encoded hexadecimal encoded binary data, with
colons between each byte (every second hex digit):
.Sp
.Vb 1
\& policy=hex:72:E4:6B:73:6D:F6:72:67:E5:73
.Ve
.IP "\fBfile\fR" 4
.IX Item "file"
indicates that the text of the policy should be taken from a file.
The string is then a filename. This is useful for policies that are
large (more than a few lines, e.g. \s-1XML\s0 documents).
.PP
\&\fI\s-1NOTE:\s0 The proxy policy value is what determines the rights granted
to the process during the proxy certificate. It's up to the
application to interpret and combine these policies.\fR
.PP
With a proxy extension, creating a proxy certificate is a matter of
two commands:
.PP
.Vb 3
\& openssl req \-new \-config proxy.cnf \e
\& \-out proxy.req \-keyout proxy.key \e
\& \-subj "/DC=org/DC=openssl/DC=users/CN=proxy 1"
\&
\& openssl x509 \-req \-CAcreateserial \-in proxy.req \-out proxy.crt \e
\& \-CA user.crt \-CAkey user.key \-days 7 \e
\& \-extfile proxy.cnf \-extensions v3_proxy1
.Ve
.PP
You can also create a proxy certificate using another proxy
certificate as issuer (note: using a different configuration
section for the proxy extensions):
.PP
.Vb 3
\& openssl req \-new \-config proxy.cnf \e
\& \-out proxy2.req \-keyout proxy2.key \e
\& \-subj "/DC=org/DC=openssl/DC=users/CN=proxy 1/CN=proxy 2"
\&
\& openssl x509 \-req \-CAcreateserial \-in proxy2.req \-out proxy2.crt \e
\& \-CA proxy.crt \-CAkey proxy.key \-days 7 \e
\& \-extfile proxy.cnf \-extensions v3_proxy2
.Ve
.SS "Using proxy certs in applications"
.IX Subsection "Using proxy certs in applications"
To interpret proxy policies, the application would normally start with
some default rights (perhaps none at all), then compute the resulting
rights by checking the rights against the chain of proxy certificates,
user certificate and \s-1CA\s0 certificates.
.PP
The complicated part is figuring out how to pass data between your
application and the certificate validation procedure.
.PP
The following ingredients are needed for such processing:
.IP "\(bu" 4
a callback function that will be called for every certificate being
validated. The callback is called several times for each certificate,
so you must be careful to do the proxy policy interpretation at the
right time. You also need to fill in the defaults when the \s-1EE\s0
certificate is checked.
.IP "\(bu" 4
a data structure that is shared between your application code and the
callback.
.IP "\(bu" 4
a wrapper function that sets it all up.
.IP "\(bu" 4
an ex_data index function that creates an index into the generic
ex_data store that is attached to an X509 validation context.
.PP
The following skeleton code can be used as a starting point:
.PP
.Vb 4
\& #include <string.h>
\& #include <netdb.h>
\& #include <openssl/x509.h>
\& #include <openssl/x509v3.h>
\&
\& #define total_rights 25
\&
\& /*
\& * In this example, I will use a view of granted rights as a bit
\& * array, one bit for each possible right.
\& */
\& typedef struct your_rights {
\& unsigned char rights[(total_rights + 7) / 8];
\& } YOUR_RIGHTS;
\&
\& /*
\& * The following procedure will create an index for the ex_data
\& * store in the X509 validation context the first time it\*(Aqs
\& * called. Subsequent calls will return the same index.
\& */
\& static int get_proxy_auth_ex_data_idx(X509_STORE_CTX *ctx)
\& {
\& static volatile int idx = \-1;
\&
\& if (idx < 0) {
\& X509_STORE_lock(X509_STORE_CTX_get0_store(ctx));
\& if (idx < 0) {
\& idx = X509_STORE_CTX_get_ex_new_index(0,
\& "for verify callback",
\& NULL,NULL,NULL);
\& }
\& X509_STORE_unlock(X509_STORE_CTX_get0_store(ctx));
\& }
\& return idx;
\& }
\&
\& /* Callback to be given to the X509 validation procedure. */
\& static int verify_callback(int ok, X509_STORE_CTX *ctx)
\& {
\& if (ok == 1) {
\& /*
\& * It\*(Aqs REALLY important you keep the proxy policy check
\& * within this section. It\*(Aqs important to know that when
\& * ok is 1, the certificates are checked from top to
\& * bottom. You get the CA root first, followed by the
\& * possible chain of intermediate CAs, followed by the EE
\& * certificate, followed by the possible proxy
\& * certificates.
\& */
\& X509 *xs = X509_STORE_CTX_get_current_cert(ctx);
\&
\& if (X509_get_extension_flags(xs) & EXFLAG_PROXY) {
\& YOUR_RIGHTS *rights =
\& (YOUR_RIGHTS *)X509_STORE_CTX_get_ex_data(ctx,
\& get_proxy_auth_ex_data_idx(ctx));
\& PROXY_CERT_INFO_EXTENSION *pci =
\& X509_get_ext_d2i(xs, NID_proxyCertInfo, NULL, NULL);
\&
\& switch (OBJ_obj2nid(pci\->proxyPolicy\->policyLanguage)) {
\& case NID_Independent:
\& /*
\& * Do whatever you need to grant explicit rights
\& * to this particular proxy certificate, usually
\& * by pulling them from some database. If there
\& * are none to be found, clear all rights (making
\& * this and any subsequent proxy certificate void
\& * of any rights).
\& */
\& memset(rights\->rights, 0, sizeof(rights\->rights));
\& break;
\& case NID_id_ppl_inheritAll:
\& /*
\& * This is basically a NOP, we simply let the
\& * current rights stand as they are.
\& */
\& break;
\& default:
\& /*
\& * This is usually the most complex section of
\& * code. You really do whatever you want as long
\& * as you follow RFC 3820. In the example we use
\& * here, the simplest thing to do is to build
\& * another, temporary bit array and fill it with
\& * the rights granted by the current proxy
\& * certificate, then use it as a mask on the
\& * accumulated rights bit array, and voila\*`, you
\& * now have a new accumulated rights bit array.
\& */
\& {
\& int i;
\& YOUR_RIGHTS tmp_rights;
\& memset(tmp_rights.rights, 0,
\& sizeof(tmp_rights.rights));
\&
\& /*
\& * process_rights() is supposed to be a
\& * procedure that takes a string and its
\& * length, interprets it and sets the bits
\& * in the YOUR_RIGHTS pointed at by the
\& * third argument.
\& */
\& process_rights((char *) pci\->proxyPolicy\->policy\->data,
\& pci\->proxyPolicy\->policy\->length,
\& &tmp_rights);
\&
\& for(i = 0; i < total_rights / 8; i++)
\& rights\->rights[i] &= tmp_rights.rights[i];
\& }
\& break;
\& }
\& PROXY_CERT_INFO_EXTENSION_free(pci);
\& } else if (!(X509_get_extension_flags(xs) & EXFLAG_CA)) {
\& /* We have an EE certificate, let\*(Aqs use it to set default! */
\& YOUR_RIGHTS *rights =
\& (YOUR_RIGHTS *)X509_STORE_CTX_get_ex_data(ctx,
\& get_proxy_auth_ex_data_idx(ctx));
\&
\& /*
\& * The following procedure finds out what rights the
\& * owner of the current certificate has, and sets them
\& * in the YOUR_RIGHTS structure pointed at by the
\& * second argument.
\& */
\& set_default_rights(xs, rights);
\& }
\& }
\& return ok;
\& }
\&
\& static int my_X509_verify_cert(X509_STORE_CTX *ctx,
\& YOUR_RIGHTS *needed_rights)
\& {
\& int ok;
\& int (*save_verify_cb)(int ok,X509_STORE_CTX *ctx) =
\& X509_STORE_CTX_get_verify_cb(ctx);
\& YOUR_RIGHTS rights;
\&
\& X509_STORE_CTX_set_verify_cb(ctx, verify_callback);
\& X509_STORE_CTX_set_ex_data(ctx, get_proxy_auth_ex_data_idx(ctx),
\& &rights);
\& X509_STORE_CTX_set_flags(ctx, X509_V_FLAG_ALLOW_PROXY_CERTS);
\& ok = X509_verify_cert(ctx);
\&
\& if (ok == 1) {
\& ok = check_needed_rights(rights, needed_rights);
\& }
\&
\& X509_STORE_CTX_set_verify_cb(ctx, save_verify_cb);
\&
\& return ok;
\& }
.Ve
.PP
If you use \s-1SSL\s0 or \s-1TLS,\s0 you can easily set up a callback to have the
certificates checked properly, using the code above:
.PP
.Vb 2
\& SSL_CTX_set_cert_verify_callback(s_ctx, my_X509_verify_cert,
\& &needed_rights);
.Ve
.SH "NOTES"
.IX Header "NOTES"
To this date, it seems that proxy certificates have only been used in
environments that are aware of them, and no one seems to have
investigated how they can be used or misused outside of such an
environment.
.PP
For that reason, OpenSSL requires that applications aware of proxy
certificates must also make that explicit.
.PP
\&\fBsubjectAltName\fR and \fBissuerAltName\fR are forbidden in proxy
certificates, and this is enforced in OpenSSL. The subject must be
the same as the issuer, with one commonName added on.
.SH "SEE ALSO"
.IX Header "SEE ALSO"
\&\fBX509_STORE_CTX_set_flags\fR\|(3),
\&\fBX509_STORE_CTX_set_verify_cb\fR\|(3),
\&\fBX509_VERIFY_PARAM_set_flags\fR\|(3),
\&\fBSSL_CTX_set_cert_verify_callback\fR\|(3),
\&\fBopenssl\-req\fR\|(1), \fBopenssl\-x509\fR\|(1),
\&\s-1RFC 3820\s0 <https://tools.ietf.org/html/rfc3820>
.SH "COPYRIGHT"
.IX Header "COPYRIGHT"
Copyright 2019 The OpenSSL Project Authors. All Rights Reserved.
.PP
Licensed under the Apache License 2.0 (the \*(L"License\*(R"). You may not use
this file except in compliance with the License. You can obtain a copy
in the file \s-1LICENSE\s0 in the source distribution or at
<https://www.openssl.org/source/license.html>.

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.\" Automatically generated by Pod::Man 4.14 (Pod::Simple 3.42)
.\"
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.if n .sp
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.de Vb \" Begin verbatim text
.ft CW
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.ft R
.fi
..
.\" Set up some character translations and predefined strings. \*(-- will
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.\" double quote, and \*(R" will give a right double quote. \*(C+ will
.\" give a nicer C++. Capital omega is used to do unbreakable dashes and
.\" therefore won't be available. \*(C` and \*(C' expand to `' in nroff,
.\" nothing in troff, for use with C<>.
.tr \(*W-
.ds C+ C\v'-.1v'\h'-1p'\s-2+\h'-1p'+\s0\v'.1v'\h'-1p'
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.\"
.\" Escape single quotes in literal strings from groff's Unicode transform.
.ie \n(.g .ds Aq \(aq
.el .ds Aq '
.\"
.\" If the F register is >0, we'll generate index entries on stderr for
.\" titles (.TH), headers (.SH), subsections (.SS), items (.Ip), and index
.\" entries marked with X<> in POD. Of course, you'll have to process the
.\" output yourself in some meaningful fashion.
.\"
.\" Avoid warning from groff about undefined register 'F'.
.de IX
..
.nr rF 0
.if \n(.g .if rF .nr rF 1
.if (\n(rF:(\n(.g==0)) \{\
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. tm Index:\\$1\t\\n%\t"\\$2"
..
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. nr % 0
. nr F 2
. \}
. \}
.\}
.rr rF
.\"
.\" Accent mark definitions (@(#)ms.acc 1.5 88/02/08 SMI; from UCB 4.2).
.\" Fear. Run. Save yourself. No user-serviceable parts.
. \" fudge factors for nroff and troff
.if n \{\
. ds #H 0
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. ds #] \&
.\}
. \" simple accents for nroff and troff
.if n \{\
. ds ' \&
. ds ` \&
. ds ^ \&
. ds , \&
. ds ~ ~
. ds /
.\}
.if t \{\
. ds ' \\k:\h'-(\\n(.wu*8/10-\*(#H)'\'\h"|\\n:u"
. ds ` \\k:\h'-(\\n(.wu*8/10-\*(#H)'\`\h'|\\n:u'
. ds ^ \\k:\h'-(\\n(.wu*10/11-\*(#H)'^\h'|\\n:u'
. ds , \\k:\h'-(\\n(.wu*8/10)',\h'|\\n:u'
. ds ~ \\k:\h'-(\\n(.wu-\*(#H-.1m)'~\h'|\\n:u'
. ds / \\k:\h'-(\\n(.wu*8/10-\*(#H)'\z\(sl\h'|\\n:u'
.\}
. \" troff and (daisy-wheel) nroff accents
.ds : \\k:\h'-(\\n(.wu*8/10-\*(#H+.1m+\*(#F)'\v'-\*(#V'\z.\h'.2m+\*(#F'.\h'|\\n:u'\v'\*(#V'
.ds 8 \h'\*(#H'\(*b\h'-\*(#H'
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.ds d- \h'\*(#H'\(pd\h'-\w'~'u'\v'-.25m'\f2\(hy\fP\v'.25m'\h'-\*(#H'
.ds D- D\\k:\h'-\w'D'u'\v'-.11m'\z\(hy\v'.11m'\h'|\\n:u'
.ds th \*(#[\v'.3m'\s+1I\s-1\v'-.3m'\h'-(\w'I'u*2/3)'\s-1o\s+1\*(#]
.ds Th \*(#[\s+2I\s-2\h'-\w'I'u*3/5'\v'-.3m'o\v'.3m'\*(#]
.ds ae a\h'-(\w'a'u*4/10)'e
.ds Ae A\h'-(\w'A'u*4/10)'E
. \" corrections for vroff
.if v .ds ~ \\k:\h'-(\\n(.wu*9/10-\*(#H)'\s-2\u~\d\s+2\h'|\\n:u'
.if v .ds ^ \\k:\h'-(\\n(.wu*10/11-\*(#H)'\v'-.4m'^\v'.4m'\h'|\\n:u'
. \" for low resolution devices (crt and lpr)
.if \n(.H>23 .if \n(.V>19 \
\{\
. ds : e
. ds 8 ss
. ds o a
. ds d- d\h'-1'\(ga
. ds D- D\h'-1'\(hy
. ds th \o'bp'
. ds Th \o'LP'
. ds ae ae
. ds Ae AE
.\}
.rm #[ #] #H #V #F C
.\" ========================================================================
.\"
.IX Title "SCRYPT 7"
.TH SCRYPT 7 "2020-04-21" "1.1.1g" "OpenSSL"
.\" For nroff, turn off justification. Always turn off hyphenation; it makes
.\" way too many mistakes in technical documents.
.if n .ad l
.nh
.SH "NAME"
scrypt \- EVP_PKEY scrypt KDF support
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
The \s-1EVP_PKEY_SCRYPT\s0 algorithm implements the scrypt password based key
derivation function, as described in \s-1RFC 7914.\s0 It is memory-hard in the sense
that it deliberately requires a significant amount of \s-1RAM\s0 for efficient
computation. The intention of this is to render brute forcing of passwords on
systems that lack large amounts of main memory (such as GPUs or ASICs)
computationally infeasible.
.PP
scrypt provides three work factors that can be customized: N, r and p. N, which
has to be a positive power of two, is the general work factor and scales \s-1CPU\s0
time in an approximately linear fashion. r is the block size of the internally
used hash function and p is the parallelization factor. Both r and p need to be
greater than zero. The amount of \s-1RAM\s0 that scrypt requires for its computation
is roughly (128 * N * r * p) bytes.
.PP
In the original paper of Colin Percival (\*(L"Stronger Key Derivation via
Sequential Memory-Hard Functions\*(R", 2009), the suggested values that give a
computation time of less than 5 seconds on a 2.5 GHz Intel Core 2 Duo are N =
2^20 = 1048576, r = 8, p = 1. Consequently, the required amount of memory for
this computation is roughly 1 GiB. On a more recent \s-1CPU\s0 (Intel i7\-5930K at 3.5
GHz), this computation takes about 3 seconds. When N, r or p are not specified,
they default to 1048576, 8, and 1, respectively. The default amount of \s-1RAM\s0 that
may be used by scrypt defaults to 1025 MiB.
.SH "NOTES"
.IX Header "NOTES"
A context for scrypt can be obtained by calling:
.PP
.Vb 1
\& EVP_PKEY_CTX *pctx = EVP_PKEY_CTX_new_id(EVP_PKEY_SCRYPT, NULL);
.Ve
.PP
The output length of an scrypt key derivation is specified via the
length parameter to the \fBEVP_PKEY_derive\fR\|(3) function.
.SH "EXAMPLES"
.IX Header "EXAMPLES"
This example derives a 64\-byte long test vector using scrypt using the password
\&\*(L"password\*(R", salt \*(L"NaCl\*(R" and N = 1024, r = 8, p = 16.
.PP
.Vb 2
\& EVP_PKEY_CTX *pctx;
\& unsigned char out[64];
\&
\& size_t outlen = sizeof(out);
\& pctx = EVP_PKEY_CTX_new_id(EVP_PKEY_SCRYPT, NULL);
\&
\& if (EVP_PKEY_derive_init(pctx) <= 0) {
\& error("EVP_PKEY_derive_init");
\& }
\& if (EVP_PKEY_CTX_set1_pbe_pass(pctx, "password", 8) <= 0) {
\& error("EVP_PKEY_CTX_set1_pbe_pass");
\& }
\& if (EVP_PKEY_CTX_set1_scrypt_salt(pctx, "NaCl", 4) <= 0) {
\& error("EVP_PKEY_CTX_set1_scrypt_salt");
\& }
\& if (EVP_PKEY_CTX_set_scrypt_N(pctx, 1024) <= 0) {
\& error("EVP_PKEY_CTX_set_scrypt_N");
\& }
\& if (EVP_PKEY_CTX_set_scrypt_r(pctx, 8) <= 0) {
\& error("EVP_PKEY_CTX_set_scrypt_r");
\& }
\& if (EVP_PKEY_CTX_set_scrypt_p(pctx, 16) <= 0) {
\& error("EVP_PKEY_CTX_set_scrypt_p");
\& }
\& if (EVP_PKEY_derive(pctx, out, &outlen) <= 0) {
\& error("EVP_PKEY_derive");
\& }
\&
\& {
\& const unsigned char expected[sizeof(out)] = {
\& 0xfd, 0xba, 0xbe, 0x1c, 0x9d, 0x34, 0x72, 0x00,
\& 0x78, 0x56, 0xe7, 0x19, 0x0d, 0x01, 0xe9, 0xfe,
\& 0x7c, 0x6a, 0xd7, 0xcb, 0xc8, 0x23, 0x78, 0x30,
\& 0xe7, 0x73, 0x76, 0x63, 0x4b, 0x37, 0x31, 0x62,
\& 0x2e, 0xaf, 0x30, 0xd9, 0x2e, 0x22, 0xa3, 0x88,
\& 0x6f, 0xf1, 0x09, 0x27, 0x9d, 0x98, 0x30, 0xda,
\& 0xc7, 0x27, 0xaf, 0xb9, 0x4a, 0x83, 0xee, 0x6d,
\& 0x83, 0x60, 0xcb, 0xdf, 0xa2, 0xcc, 0x06, 0x40
\& };
\&
\& assert(!memcmp(out, expected, sizeof(out)));
\& }
\&
\& EVP_PKEY_CTX_free(pctx);
.Ve
.SH "CONFORMING TO"
.IX Header "CONFORMING TO"
\&\s-1RFC 7914\s0
.SH "SEE ALSO"
.IX Header "SEE ALSO"
\&\fBEVP_PKEY_CTX_set1_scrypt_salt\fR\|(3),
\&\fBEVP_PKEY_CTX_set_scrypt_N\fR\|(3),
\&\fBEVP_PKEY_CTX_set_scrypt_r\fR\|(3),
\&\fBEVP_PKEY_CTX_set_scrypt_p\fR\|(3),
\&\fBEVP_PKEY_CTX_set_scrypt_maxmem_bytes\fR\|(3),
\&\fBEVP_PKEY_CTX_new\fR\|(3),
\&\fBEVP_PKEY_CTX_ctrl_str\fR\|(3),
\&\fBEVP_PKEY_derive\fR\|(3)
.SH "COPYRIGHT"
.IX Header "COPYRIGHT"
Copyright 2017\-2019 The OpenSSL Project Authors. All Rights Reserved.
.PP
Licensed under the OpenSSL license (the \*(L"License\*(R"). You may not use
this file except in compliance with the License. You can obtain a copy
in the file \s-1LICENSE\s0 in the source distribution or at
<https://www.openssl.org/source/license.html>.

914
deps/openssl/mingw64/share/man/man7/ssl.7 vendored Normal file
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@ -0,0 +1,914 @@
.\" Automatically generated by Pod::Man 4.14 (Pod::Simple 3.42)
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.\" nothing in troff, for use with C<>.
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.\"
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.ie \n(.g .ds Aq \(aq
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.\"
.\" If the F register is >0, we'll generate index entries on stderr for
.\" titles (.TH), headers (.SH), subsections (.SS), items (.Ip), and index
.\" entries marked with X<> in POD. Of course, you'll have to process the
.\" output yourself in some meaningful fashion.
.\"
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.\"
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. \" fudge factors for nroff and troff
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. ds #H ((1u-(\\\\n(.fu%2u))*.13m)
. ds #V .6m
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.if t \{\
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.ds ae a\h'-(\w'a'u*4/10)'e
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. \" corrections for vroff
.if v .ds ~ \\k:\h'-(\\n(.wu*9/10-\*(#H)'\s-2\u~\d\s+2\h'|\\n:u'
.if v .ds ^ \\k:\h'-(\\n(.wu*10/11-\*(#H)'\v'-.4m'^\v'.4m'\h'|\\n:u'
. \" for low resolution devices (crt and lpr)
.if \n(.H>23 .if \n(.V>19 \
\{\
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. ds ae ae
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.\}
.rm #[ #] #H #V #F C
.\" ========================================================================
.\"
.IX Title "SSL 7"
.TH SSL 7 "2020-04-21" "1.1.1g" "OpenSSL"
.\" For nroff, turn off justification. Always turn off hyphenation; it makes
.\" way too many mistakes in technical documents.
.if n .ad l
.nh
.SH "NAME"
ssl \- OpenSSL SSL/TLS library
.SH "SYNOPSIS"
.IX Header "SYNOPSIS"
See the individual manual pages for details.
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
The OpenSSL \fBssl\fR library implements the Secure Sockets Layer (\s-1SSL\s0 v2/v3) and
Transport Layer Security (\s-1TLS\s0 v1) protocols. It provides a rich \s-1API\s0 which is
documented here.
.PP
An \fB\s-1SSL_CTX\s0\fR object is created as a framework to establish
\&\s-1TLS/SSL\s0 enabled connections (see \fBSSL_CTX_new\fR\|(3)).
Various options regarding certificates, algorithms etc. can be set
in this object.
.PP
When a network connection has been created, it can be assigned to an
\&\fB\s-1SSL\s0\fR object. After the \fB\s-1SSL\s0\fR object has been created using
\&\fBSSL_new\fR\|(3), \fBSSL_set_fd\fR\|(3) or
\&\fBSSL_set_bio\fR\|(3) can be used to associate the network
connection with the object.
.PP
When the \s-1TLS/SSL\s0 handshake is performed using
\&\fBSSL_accept\fR\|(3) or \fBSSL_connect\fR\|(3)
respectively.
\&\fBSSL_read_ex\fR\|(3), \fBSSL_read\fR\|(3), \fBSSL_write_ex\fR\|(3) and \fBSSL_write\fR\|(3) are
used to read and write data on the \s-1TLS/SSL\s0 connection.
\&\fBSSL_shutdown\fR\|(3) can be used to shut down the
\&\s-1TLS/SSL\s0 connection.
.SH "DATA STRUCTURES"
.IX Header "DATA STRUCTURES"
Currently the OpenSSL \fBssl\fR library functions deals with the following data
structures:
.IP "\fB\s-1SSL_METHOD\s0\fR (\s-1SSL\s0 Method)" 4
.IX Item "SSL_METHOD (SSL Method)"
This is a dispatch structure describing the internal \fBssl\fR library
methods/functions which implement the various protocol versions (SSLv3
TLSv1, ...). It's needed to create an \fB\s-1SSL_CTX\s0\fR.
.IP "\fB\s-1SSL_CIPHER\s0\fR (\s-1SSL\s0 Cipher)" 4
.IX Item "SSL_CIPHER (SSL Cipher)"
This structure holds the algorithm information for a particular cipher which
are a core part of the \s-1SSL/TLS\s0 protocol. The available ciphers are configured
on a \fB\s-1SSL_CTX\s0\fR basis and the actual ones used are then part of the
\&\fB\s-1SSL_SESSION\s0\fR.
.IP "\fB\s-1SSL_CTX\s0\fR (\s-1SSL\s0 Context)" 4
.IX Item "SSL_CTX (SSL Context)"
This is the global context structure which is created by a server or client
once per program life-time and which holds mainly default values for the
\&\fB\s-1SSL\s0\fR structures which are later created for the connections.
.IP "\fB\s-1SSL_SESSION\s0\fR (\s-1SSL\s0 Session)" 4
.IX Item "SSL_SESSION (SSL Session)"
This is a structure containing the current \s-1TLS/SSL\s0 session details for a
connection: \fB\s-1SSL_CIPHER\s0\fRs, client and server certificates, keys, etc.
.IP "\fB\s-1SSL\s0\fR (\s-1SSL\s0 Connection)" 4
.IX Item "SSL (SSL Connection)"
This is the main \s-1SSL/TLS\s0 structure which is created by a server or client per
established connection. This actually is the core structure in the \s-1SSL API.\s0
At run-time the application usually deals with this structure which has
links to mostly all other structures.
.SH "HEADER FILES"
.IX Header "HEADER FILES"
Currently the OpenSSL \fBssl\fR library provides the following C header files
containing the prototypes for the data structures and functions:
.IP "\fBssl.h\fR" 4
.IX Item "ssl.h"
This is the common header file for the \s-1SSL/TLS API.\s0 Include it into your
program to make the \s-1API\s0 of the \fBssl\fR library available. It internally
includes both more private \s-1SSL\s0 headers and headers from the \fBcrypto\fR library.
Whenever you need hard-core details on the internals of the \s-1SSL API,\s0 look
inside this header file.
.IP "\fBssl2.h\fR" 4
.IX Item "ssl2.h"
Unused. Present for backwards compatibility only.
.IP "\fBssl3.h\fR" 4
.IX Item "ssl3.h"
This is the sub header file dealing with the SSLv3 protocol only.
\&\fIUsually you don't have to include it explicitly because
it's already included by ssl.h\fR.
.IP "\fBtls1.h\fR" 4
.IX Item "tls1.h"
This is the sub header file dealing with the TLSv1 protocol only.
\&\fIUsually you don't have to include it explicitly because
it's already included by ssl.h\fR.
.SH "API FUNCTIONS"
.IX Header "API FUNCTIONS"
Currently the OpenSSL \fBssl\fR library exports 214 \s-1API\s0 functions.
They are documented in the following:
.SS "Dealing with Protocol Methods"
.IX Subsection "Dealing with Protocol Methods"
Here we document the various \s-1API\s0 functions which deal with the \s-1SSL/TLS\s0
protocol methods defined in \fB\s-1SSL_METHOD\s0\fR structures.
.IP "const \s-1SSL_METHOD\s0 *\fBTLS_method\fR(void);" 4
.IX Item "const SSL_METHOD *TLS_method(void);"
Constructor for the \fIversion-flexible\fR \s-1SSL_METHOD\s0 structure for clients,
servers or both.
See \fBSSL_CTX_new\fR\|(3) for details.
.IP "const \s-1SSL_METHOD\s0 *\fBTLS_client_method\fR(void);" 4
.IX Item "const SSL_METHOD *TLS_client_method(void);"
Constructor for the \fIversion-flexible\fR \s-1SSL_METHOD\s0 structure for clients.
Must be used to support the TLSv1.3 protocol.
.IP "const \s-1SSL_METHOD\s0 *\fBTLS_server_method\fR(void);" 4
.IX Item "const SSL_METHOD *TLS_server_method(void);"
Constructor for the \fIversion-flexible\fR \s-1SSL_METHOD\s0 structure for servers.
Must be used to support the TLSv1.3 protocol.
.IP "const \s-1SSL_METHOD\s0 *\fBTLSv1_2_method\fR(void);" 4
.IX Item "const SSL_METHOD *TLSv1_2_method(void);"
Constructor for the TLSv1.2 \s-1SSL_METHOD\s0 structure for clients, servers or both.
.IP "const \s-1SSL_METHOD\s0 *\fBTLSv1_2_client_method\fR(void);" 4
.IX Item "const SSL_METHOD *TLSv1_2_client_method(void);"
Constructor for the TLSv1.2 \s-1SSL_METHOD\s0 structure for clients.
.IP "const \s-1SSL_METHOD\s0 *\fBTLSv1_2_server_method\fR(void);" 4
.IX Item "const SSL_METHOD *TLSv1_2_server_method(void);"
Constructor for the TLSv1.2 \s-1SSL_METHOD\s0 structure for servers.
.IP "const \s-1SSL_METHOD\s0 *\fBTLSv1_1_method\fR(void);" 4
.IX Item "const SSL_METHOD *TLSv1_1_method(void);"
Constructor for the TLSv1.1 \s-1SSL_METHOD\s0 structure for clients, servers or both.
.IP "const \s-1SSL_METHOD\s0 *\fBTLSv1_1_client_method\fR(void);" 4
.IX Item "const SSL_METHOD *TLSv1_1_client_method(void);"
Constructor for the TLSv1.1 \s-1SSL_METHOD\s0 structure for clients.
.IP "const \s-1SSL_METHOD\s0 *\fBTLSv1_1_server_method\fR(void);" 4
.IX Item "const SSL_METHOD *TLSv1_1_server_method(void);"
Constructor for the TLSv1.1 \s-1SSL_METHOD\s0 structure for servers.
.IP "const \s-1SSL_METHOD\s0 *\fBTLSv1_method\fR(void);" 4
.IX Item "const SSL_METHOD *TLSv1_method(void);"
Constructor for the TLSv1 \s-1SSL_METHOD\s0 structure for clients, servers or both.
.IP "const \s-1SSL_METHOD\s0 *\fBTLSv1_client_method\fR(void);" 4
.IX Item "const SSL_METHOD *TLSv1_client_method(void);"
Constructor for the TLSv1 \s-1SSL_METHOD\s0 structure for clients.
.IP "const \s-1SSL_METHOD\s0 *\fBTLSv1_server_method\fR(void);" 4
.IX Item "const SSL_METHOD *TLSv1_server_method(void);"
Constructor for the TLSv1 \s-1SSL_METHOD\s0 structure for servers.
.IP "const \s-1SSL_METHOD\s0 *\fBSSLv3_method\fR(void);" 4
.IX Item "const SSL_METHOD *SSLv3_method(void);"
Constructor for the SSLv3 \s-1SSL_METHOD\s0 structure for clients, servers or both.
.IP "const \s-1SSL_METHOD\s0 *\fBSSLv3_client_method\fR(void);" 4
.IX Item "const SSL_METHOD *SSLv3_client_method(void);"
Constructor for the SSLv3 \s-1SSL_METHOD\s0 structure for clients.
.IP "const \s-1SSL_METHOD\s0 *\fBSSLv3_server_method\fR(void);" 4
.IX Item "const SSL_METHOD *SSLv3_server_method(void);"
Constructor for the SSLv3 \s-1SSL_METHOD\s0 structure for servers.
.SS "Dealing with Ciphers"
.IX Subsection "Dealing with Ciphers"
Here we document the various \s-1API\s0 functions which deal with the \s-1SSL/TLS\s0
ciphers defined in \fB\s-1SSL_CIPHER\s0\fR structures.
.IP "char *\fBSSL_CIPHER_description\fR(\s-1SSL_CIPHER\s0 *cipher, char *buf, int len);" 4
.IX Item "char *SSL_CIPHER_description(SSL_CIPHER *cipher, char *buf, int len);"
Write a string to \fIbuf\fR (with a maximum size of \fIlen\fR) containing a human
readable description of \fIcipher\fR. Returns \fIbuf\fR.
.IP "int \fBSSL_CIPHER_get_bits\fR(\s-1SSL_CIPHER\s0 *cipher, int *alg_bits);" 4
.IX Item "int SSL_CIPHER_get_bits(SSL_CIPHER *cipher, int *alg_bits);"
Determine the number of bits in \fIcipher\fR. Because of export crippled ciphers
there are two bits: The bits the algorithm supports in general (stored to
\&\fIalg_bits\fR) and the bits which are actually used (the return value).
.IP "const char *\fBSSL_CIPHER_get_name\fR(\s-1SSL_CIPHER\s0 *cipher);" 4
.IX Item "const char *SSL_CIPHER_get_name(SSL_CIPHER *cipher);"
Return the internal name of \fIcipher\fR as a string. These are the various
strings defined by the \fISSL3_TXT_xxx\fR and \fITLS1_TXT_xxx\fR
definitions in the header files.
.IP "const char *\fBSSL_CIPHER_get_version\fR(\s-1SSL_CIPHER\s0 *cipher);" 4
.IX Item "const char *SSL_CIPHER_get_version(SSL_CIPHER *cipher);"
Returns a string like "\f(CW\*(C`SSLv3\*(C'\fR\*(L" or \*(R"\f(CW\*(C`TLSv1.2\*(C'\fR" which indicates the
\&\s-1SSL/TLS\s0 protocol version to which \fIcipher\fR belongs (i.e. where it was defined
in the specification the first time).
.SS "Dealing with Protocol Contexts"
.IX Subsection "Dealing with Protocol Contexts"
Here we document the various \s-1API\s0 functions which deal with the \s-1SSL/TLS\s0
protocol context defined in the \fB\s-1SSL_CTX\s0\fR structure.
.IP "int \fBSSL_CTX_add_client_CA\fR(\s-1SSL_CTX\s0 *ctx, X509 *x);" 4
.IX Item "int SSL_CTX_add_client_CA(SSL_CTX *ctx, X509 *x);"
.PD 0
.IP "long \fBSSL_CTX_add_extra_chain_cert\fR(\s-1SSL_CTX\s0 *ctx, X509 *x509);" 4
.IX Item "long SSL_CTX_add_extra_chain_cert(SSL_CTX *ctx, X509 *x509);"
.IP "int \fBSSL_CTX_add_session\fR(\s-1SSL_CTX\s0 *ctx, \s-1SSL_SESSION\s0 *c);" 4
.IX Item "int SSL_CTX_add_session(SSL_CTX *ctx, SSL_SESSION *c);"
.IP "int \fBSSL_CTX_check_private_key\fR(const \s-1SSL_CTX\s0 *ctx);" 4
.IX Item "int SSL_CTX_check_private_key(const SSL_CTX *ctx);"
.IP "long \fBSSL_CTX_ctrl\fR(\s-1SSL_CTX\s0 *ctx, int cmd, long larg, char *parg);" 4
.IX Item "long SSL_CTX_ctrl(SSL_CTX *ctx, int cmd, long larg, char *parg);"
.IP "void \fBSSL_CTX_flush_sessions\fR(\s-1SSL_CTX\s0 *s, long t);" 4
.IX Item "void SSL_CTX_flush_sessions(SSL_CTX *s, long t);"
.IP "void \fBSSL_CTX_free\fR(\s-1SSL_CTX\s0 *a);" 4
.IX Item "void SSL_CTX_free(SSL_CTX *a);"
.IP "char *\fBSSL_CTX_get_app_data\fR(\s-1SSL_CTX\s0 *ctx);" 4
.IX Item "char *SSL_CTX_get_app_data(SSL_CTX *ctx);"
.IP "X509_STORE *\fBSSL_CTX_get_cert_store\fR(\s-1SSL_CTX\s0 *ctx);" 4
.IX Item "X509_STORE *SSL_CTX_get_cert_store(SSL_CTX *ctx);"
.IP "\s-1STACK\s0 *\fBSSL_CTX_get_ciphers\fR(const \s-1SSL_CTX\s0 *ctx);" 4
.IX Item "STACK *SSL_CTX_get_ciphers(const SSL_CTX *ctx);"
.IP "\s-1STACK\s0 *\fBSSL_CTX_get_client_CA_list\fR(const \s-1SSL_CTX\s0 *ctx);" 4
.IX Item "STACK *SSL_CTX_get_client_CA_list(const SSL_CTX *ctx);"
.IP "int (*\fBSSL_CTX_get_client_cert_cb\fR(\s-1SSL_CTX\s0 *ctx))(\s-1SSL\s0 *ssl, X509 **x509, \s-1EVP_PKEY\s0 **pkey);" 4
.IX Item "int (*SSL_CTX_get_client_cert_cb(SSL_CTX *ctx))(SSL *ssl, X509 **x509, EVP_PKEY **pkey);"
.IP "void \fBSSL_CTX_get_default_read_ahead\fR(\s-1SSL_CTX\s0 *ctx);" 4
.IX Item "void SSL_CTX_get_default_read_ahead(SSL_CTX *ctx);"
.IP "char *\fBSSL_CTX_get_ex_data\fR(const \s-1SSL_CTX\s0 *s, int idx);" 4
.IX Item "char *SSL_CTX_get_ex_data(const SSL_CTX *s, int idx);"
.IP "int \fBSSL_CTX_get_ex_new_index\fR(long argl, char *argp, int (*new_func);(void), int (*dup_func)(void), void (*free_func)(void))" 4
.IX Item "int SSL_CTX_get_ex_new_index(long argl, char *argp, int (*new_func);(void), int (*dup_func)(void), void (*free_func)(void))"
.IP "void (*\fBSSL_CTX_get_info_callback\fR(\s-1SSL_CTX\s0 *ctx))(\s-1SSL\s0 *ssl, int cb, int ret);" 4
.IX Item "void (*SSL_CTX_get_info_callback(SSL_CTX *ctx))(SSL *ssl, int cb, int ret);"
.IP "int \fBSSL_CTX_get_quiet_shutdown\fR(const \s-1SSL_CTX\s0 *ctx);" 4
.IX Item "int SSL_CTX_get_quiet_shutdown(const SSL_CTX *ctx);"
.IP "void \fBSSL_CTX_get_read_ahead\fR(\s-1SSL_CTX\s0 *ctx);" 4
.IX Item "void SSL_CTX_get_read_ahead(SSL_CTX *ctx);"
.IP "int \fBSSL_CTX_get_session_cache_mode\fR(\s-1SSL_CTX\s0 *ctx);" 4
.IX Item "int SSL_CTX_get_session_cache_mode(SSL_CTX *ctx);"
.IP "long \fBSSL_CTX_get_timeout\fR(const \s-1SSL_CTX\s0 *ctx);" 4
.IX Item "long SSL_CTX_get_timeout(const SSL_CTX *ctx);"
.IP "int (*\fBSSL_CTX_get_verify_callback\fR(const \s-1SSL_CTX\s0 *ctx))(int ok, X509_STORE_CTX *ctx);" 4
.IX Item "int (*SSL_CTX_get_verify_callback(const SSL_CTX *ctx))(int ok, X509_STORE_CTX *ctx);"
.IP "int \fBSSL_CTX_get_verify_mode\fR(\s-1SSL_CTX\s0 *ctx);" 4
.IX Item "int SSL_CTX_get_verify_mode(SSL_CTX *ctx);"
.IP "int \fBSSL_CTX_load_verify_locations\fR(\s-1SSL_CTX\s0 *ctx, const char *CAfile, const char *CApath);" 4
.IX Item "int SSL_CTX_load_verify_locations(SSL_CTX *ctx, const char *CAfile, const char *CApath);"
.IP "\s-1SSL_CTX\s0 *\fBSSL_CTX_new\fR(const \s-1SSL_METHOD\s0 *meth);" 4
.IX Item "SSL_CTX *SSL_CTX_new(const SSL_METHOD *meth);"
.IP "int SSL_CTX_up_ref(\s-1SSL_CTX\s0 *ctx);" 4
.IX Item "int SSL_CTX_up_ref(SSL_CTX *ctx);"
.IP "int \fBSSL_CTX_remove_session\fR(\s-1SSL_CTX\s0 *ctx, \s-1SSL_SESSION\s0 *c);" 4
.IX Item "int SSL_CTX_remove_session(SSL_CTX *ctx, SSL_SESSION *c);"
.IP "int \fBSSL_CTX_sess_accept\fR(\s-1SSL_CTX\s0 *ctx);" 4
.IX Item "int SSL_CTX_sess_accept(SSL_CTX *ctx);"
.IP "int \fBSSL_CTX_sess_accept_good\fR(\s-1SSL_CTX\s0 *ctx);" 4
.IX Item "int SSL_CTX_sess_accept_good(SSL_CTX *ctx);"
.IP "int \fBSSL_CTX_sess_accept_renegotiate\fR(\s-1SSL_CTX\s0 *ctx);" 4
.IX Item "int SSL_CTX_sess_accept_renegotiate(SSL_CTX *ctx);"
.IP "int \fBSSL_CTX_sess_cache_full\fR(\s-1SSL_CTX\s0 *ctx);" 4
.IX Item "int SSL_CTX_sess_cache_full(SSL_CTX *ctx);"
.IP "int \fBSSL_CTX_sess_cb_hits\fR(\s-1SSL_CTX\s0 *ctx);" 4
.IX Item "int SSL_CTX_sess_cb_hits(SSL_CTX *ctx);"
.IP "int \fBSSL_CTX_sess_connect\fR(\s-1SSL_CTX\s0 *ctx);" 4
.IX Item "int SSL_CTX_sess_connect(SSL_CTX *ctx);"
.IP "int \fBSSL_CTX_sess_connect_good\fR(\s-1SSL_CTX\s0 *ctx);" 4
.IX Item "int SSL_CTX_sess_connect_good(SSL_CTX *ctx);"
.IP "int \fBSSL_CTX_sess_connect_renegotiate\fR(\s-1SSL_CTX\s0 *ctx);" 4
.IX Item "int SSL_CTX_sess_connect_renegotiate(SSL_CTX *ctx);"
.IP "int \fBSSL_CTX_sess_get_cache_size\fR(\s-1SSL_CTX\s0 *ctx);" 4
.IX Item "int SSL_CTX_sess_get_cache_size(SSL_CTX *ctx);"
.IP "\s-1SSL_SESSION\s0 *(*\fBSSL_CTX_sess_get_get_cb\fR(\s-1SSL_CTX\s0 *ctx))(\s-1SSL\s0 *ssl, unsigned char *data, int len, int *copy);" 4
.IX Item "SSL_SESSION *(*SSL_CTX_sess_get_get_cb(SSL_CTX *ctx))(SSL *ssl, unsigned char *data, int len, int *copy);"
.IP "int (*\fBSSL_CTX_sess_get_new_cb\fR(\s-1SSL_CTX\s0 *ctx)(\s-1SSL\s0 *ssl, \s-1SSL_SESSION\s0 *sess);" 4
.IX Item "int (*SSL_CTX_sess_get_new_cb(SSL_CTX *ctx)(SSL *ssl, SSL_SESSION *sess);"
.IP "void (*\fBSSL_CTX_sess_get_remove_cb\fR(\s-1SSL_CTX\s0 *ctx)(\s-1SSL_CTX\s0 *ctx, \s-1SSL_SESSION\s0 *sess);" 4
.IX Item "void (*SSL_CTX_sess_get_remove_cb(SSL_CTX *ctx)(SSL_CTX *ctx, SSL_SESSION *sess);"
.IP "int \fBSSL_CTX_sess_hits\fR(\s-1SSL_CTX\s0 *ctx);" 4
.IX Item "int SSL_CTX_sess_hits(SSL_CTX *ctx);"
.IP "int \fBSSL_CTX_sess_misses\fR(\s-1SSL_CTX\s0 *ctx);" 4
.IX Item "int SSL_CTX_sess_misses(SSL_CTX *ctx);"
.IP "int \fBSSL_CTX_sess_number\fR(\s-1SSL_CTX\s0 *ctx);" 4
.IX Item "int SSL_CTX_sess_number(SSL_CTX *ctx);"
.IP "void \fBSSL_CTX_sess_set_cache_size\fR(\s-1SSL_CTX\s0 *ctx, t);" 4
.IX Item "void SSL_CTX_sess_set_cache_size(SSL_CTX *ctx, t);"
.IP "void \fBSSL_CTX_sess_set_get_cb\fR(\s-1SSL_CTX\s0 *ctx, \s-1SSL_SESSION\s0 *(*cb)(\s-1SSL\s0 *ssl, unsigned char *data, int len, int *copy));" 4
.IX Item "void SSL_CTX_sess_set_get_cb(SSL_CTX *ctx, SSL_SESSION *(*cb)(SSL *ssl, unsigned char *data, int len, int *copy));"
.IP "void \fBSSL_CTX_sess_set_new_cb\fR(\s-1SSL_CTX\s0 *ctx, int (*cb)(\s-1SSL\s0 *ssl, \s-1SSL_SESSION\s0 *sess));" 4
.IX Item "void SSL_CTX_sess_set_new_cb(SSL_CTX *ctx, int (*cb)(SSL *ssl, SSL_SESSION *sess));"
.IP "void \fBSSL_CTX_sess_set_remove_cb\fR(\s-1SSL_CTX\s0 *ctx, void (*cb)(\s-1SSL_CTX\s0 *ctx, \s-1SSL_SESSION\s0 *sess));" 4
.IX Item "void SSL_CTX_sess_set_remove_cb(SSL_CTX *ctx, void (*cb)(SSL_CTX *ctx, SSL_SESSION *sess));"
.IP "int \fBSSL_CTX_sess_timeouts\fR(\s-1SSL_CTX\s0 *ctx);" 4
.IX Item "int SSL_CTX_sess_timeouts(SSL_CTX *ctx);"
.IP "\s-1LHASH\s0 *\fBSSL_CTX_sessions\fR(\s-1SSL_CTX\s0 *ctx);" 4
.IX Item "LHASH *SSL_CTX_sessions(SSL_CTX *ctx);"
.IP "int \fBSSL_CTX_set_app_data\fR(\s-1SSL_CTX\s0 *ctx, void *arg);" 4
.IX Item "int SSL_CTX_set_app_data(SSL_CTX *ctx, void *arg);"
.IP "void \fBSSL_CTX_set_cert_store\fR(\s-1SSL_CTX\s0 *ctx, X509_STORE *cs);" 4
.IX Item "void SSL_CTX_set_cert_store(SSL_CTX *ctx, X509_STORE *cs);"
.IP "void \fBSSL_CTX_set1_cert_store\fR(\s-1SSL_CTX\s0 *ctx, X509_STORE *cs);" 4
.IX Item "void SSL_CTX_set1_cert_store(SSL_CTX *ctx, X509_STORE *cs);"
.IP "void \fBSSL_CTX_set_cert_verify_cb\fR(\s-1SSL_CTX\s0 *ctx, int (*cb)(), char *arg)" 4
.IX Item "void SSL_CTX_set_cert_verify_cb(SSL_CTX *ctx, int (*cb)(), char *arg)"
.IP "int \fBSSL_CTX_set_cipher_list\fR(\s-1SSL_CTX\s0 *ctx, char *str);" 4
.IX Item "int SSL_CTX_set_cipher_list(SSL_CTX *ctx, char *str);"
.IP "void \fBSSL_CTX_set_client_CA_list\fR(\s-1SSL_CTX\s0 *ctx, \s-1STACK\s0 *list);" 4
.IX Item "void SSL_CTX_set_client_CA_list(SSL_CTX *ctx, STACK *list);"
.IP "void \fBSSL_CTX_set_client_cert_cb\fR(\s-1SSL_CTX\s0 *ctx, int (*cb)(\s-1SSL\s0 *ssl, X509 **x509, \s-1EVP_PKEY\s0 **pkey));" 4
.IX Item "void SSL_CTX_set_client_cert_cb(SSL_CTX *ctx, int (*cb)(SSL *ssl, X509 **x509, EVP_PKEY **pkey));"
.IP "int \fBSSL_CTX_set_ct_validation_callback\fR(\s-1SSL_CTX\s0 *ctx, ssl_ct_validation_cb callback, void *arg);" 4
.IX Item "int SSL_CTX_set_ct_validation_callback(SSL_CTX *ctx, ssl_ct_validation_cb callback, void *arg);"
.IP "void \fBSSL_CTX_set_default_passwd_cb\fR(\s-1SSL_CTX\s0 *ctx, int (*cb);(void))" 4
.IX Item "void SSL_CTX_set_default_passwd_cb(SSL_CTX *ctx, int (*cb);(void))"
.IP "void \fBSSL_CTX_set_default_read_ahead\fR(\s-1SSL_CTX\s0 *ctx, int m);" 4
.IX Item "void SSL_CTX_set_default_read_ahead(SSL_CTX *ctx, int m);"
.IP "int \fBSSL_CTX_set_default_verify_paths\fR(\s-1SSL_CTX\s0 *ctx);" 4
.IX Item "int SSL_CTX_set_default_verify_paths(SSL_CTX *ctx);"
.PD
Use the default paths to locate trusted \s-1CA\s0 certificates. There is one default
directory path and one default file path. Both are set via this call.
.IP "int \fBSSL_CTX_set_default_verify_dir\fR(\s-1SSL_CTX\s0 *ctx)" 4
.IX Item "int SSL_CTX_set_default_verify_dir(SSL_CTX *ctx)"
Use the default directory path to locate trusted \s-1CA\s0 certificates.
.IP "int \fBSSL_CTX_set_default_verify_file\fR(\s-1SSL_CTX\s0 *ctx)" 4
.IX Item "int SSL_CTX_set_default_verify_file(SSL_CTX *ctx)"
Use the file path to locate trusted \s-1CA\s0 certificates.
.IP "int \fBSSL_CTX_set_ex_data\fR(\s-1SSL_CTX\s0 *s, int idx, char *arg);" 4
.IX Item "int SSL_CTX_set_ex_data(SSL_CTX *s, int idx, char *arg);"
.PD 0
.IP "void \fBSSL_CTX_set_info_callback\fR(\s-1SSL_CTX\s0 *ctx, void (*cb)(\s-1SSL\s0 *ssl, int cb, int ret));" 4
.IX Item "void SSL_CTX_set_info_callback(SSL_CTX *ctx, void (*cb)(SSL *ssl, int cb, int ret));"
.IP "void \fBSSL_CTX_set_msg_callback\fR(\s-1SSL_CTX\s0 *ctx, void (*cb)(int write_p, int version, int content_type, const void *buf, size_t len, \s-1SSL\s0 *ssl, void *arg));" 4
.IX Item "void SSL_CTX_set_msg_callback(SSL_CTX *ctx, void (*cb)(int write_p, int version, int content_type, const void *buf, size_t len, SSL *ssl, void *arg));"
.IP "void \fBSSL_CTX_set_msg_callback_arg\fR(\s-1SSL_CTX\s0 *ctx, void *arg);" 4
.IX Item "void SSL_CTX_set_msg_callback_arg(SSL_CTX *ctx, void *arg);"
.IP "unsigned long \fBSSL_CTX_clear_options\fR(\s-1SSL_CTX\s0 *ctx, unsigned long op);" 4
.IX Item "unsigned long SSL_CTX_clear_options(SSL_CTX *ctx, unsigned long op);"
.IP "unsigned long \fBSSL_CTX_get_options\fR(\s-1SSL_CTX\s0 *ctx);" 4
.IX Item "unsigned long SSL_CTX_get_options(SSL_CTX *ctx);"
.IP "unsigned long \fBSSL_CTX_set_options\fR(\s-1SSL_CTX\s0 *ctx, unsigned long op);" 4
.IX Item "unsigned long SSL_CTX_set_options(SSL_CTX *ctx, unsigned long op);"
.IP "void \fBSSL_CTX_set_quiet_shutdown\fR(\s-1SSL_CTX\s0 *ctx, int mode);" 4
.IX Item "void SSL_CTX_set_quiet_shutdown(SSL_CTX *ctx, int mode);"
.IP "void \fBSSL_CTX_set_read_ahead\fR(\s-1SSL_CTX\s0 *ctx, int m);" 4
.IX Item "void SSL_CTX_set_read_ahead(SSL_CTX *ctx, int m);"
.IP "void \fBSSL_CTX_set_session_cache_mode\fR(\s-1SSL_CTX\s0 *ctx, int mode);" 4
.IX Item "void SSL_CTX_set_session_cache_mode(SSL_CTX *ctx, int mode);"
.IP "int \fBSSL_CTX_set_ssl_version\fR(\s-1SSL_CTX\s0 *ctx, const \s-1SSL_METHOD\s0 *meth);" 4
.IX Item "int SSL_CTX_set_ssl_version(SSL_CTX *ctx, const SSL_METHOD *meth);"
.IP "void \fBSSL_CTX_set_timeout\fR(\s-1SSL_CTX\s0 *ctx, long t);" 4
.IX Item "void SSL_CTX_set_timeout(SSL_CTX *ctx, long t);"
.IP "long \fBSSL_CTX_set_tmp_dh\fR(SSL_CTX* ctx, \s-1DH\s0 *dh);" 4
.IX Item "long SSL_CTX_set_tmp_dh(SSL_CTX* ctx, DH *dh);"
.IP "long \fBSSL_CTX_set_tmp_dh_callback\fR(\s-1SSL_CTX\s0 *ctx, \s-1DH\s0 *(*cb)(void));" 4
.IX Item "long SSL_CTX_set_tmp_dh_callback(SSL_CTX *ctx, DH *(*cb)(void));"
.IP "void \fBSSL_CTX_set_verify\fR(\s-1SSL_CTX\s0 *ctx, int mode, int (*cb);(void))" 4
.IX Item "void SSL_CTX_set_verify(SSL_CTX *ctx, int mode, int (*cb);(void))"
.IP "int \fBSSL_CTX_use_PrivateKey\fR(\s-1SSL_CTX\s0 *ctx, \s-1EVP_PKEY\s0 *pkey);" 4
.IX Item "int SSL_CTX_use_PrivateKey(SSL_CTX *ctx, EVP_PKEY *pkey);"
.IP "int \fBSSL_CTX_use_PrivateKey_ASN1\fR(int type, \s-1SSL_CTX\s0 *ctx, unsigned char *d, long len);" 4
.IX Item "int SSL_CTX_use_PrivateKey_ASN1(int type, SSL_CTX *ctx, unsigned char *d, long len);"
.IP "int \fBSSL_CTX_use_PrivateKey_file\fR(\s-1SSL_CTX\s0 *ctx, const char *file, int type);" 4
.IX Item "int SSL_CTX_use_PrivateKey_file(SSL_CTX *ctx, const char *file, int type);"
.IP "int \fBSSL_CTX_use_RSAPrivateKey\fR(\s-1SSL_CTX\s0 *ctx, \s-1RSA\s0 *rsa);" 4
.IX Item "int SSL_CTX_use_RSAPrivateKey(SSL_CTX *ctx, RSA *rsa);"
.IP "int \fBSSL_CTX_use_RSAPrivateKey_ASN1\fR(\s-1SSL_CTX\s0 *ctx, unsigned char *d, long len);" 4
.IX Item "int SSL_CTX_use_RSAPrivateKey_ASN1(SSL_CTX *ctx, unsigned char *d, long len);"
.IP "int \fBSSL_CTX_use_RSAPrivateKey_file\fR(\s-1SSL_CTX\s0 *ctx, const char *file, int type);" 4
.IX Item "int SSL_CTX_use_RSAPrivateKey_file(SSL_CTX *ctx, const char *file, int type);"
.IP "int \fBSSL_CTX_use_certificate\fR(\s-1SSL_CTX\s0 *ctx, X509 *x);" 4
.IX Item "int SSL_CTX_use_certificate(SSL_CTX *ctx, X509 *x);"
.IP "int \fBSSL_CTX_use_certificate_ASN1\fR(\s-1SSL_CTX\s0 *ctx, int len, unsigned char *d);" 4
.IX Item "int SSL_CTX_use_certificate_ASN1(SSL_CTX *ctx, int len, unsigned char *d);"
.IP "int \fBSSL_CTX_use_certificate_file\fR(\s-1SSL_CTX\s0 *ctx, const char *file, int type);" 4
.IX Item "int SSL_CTX_use_certificate_file(SSL_CTX *ctx, const char *file, int type);"
.IP "int \fBSSL_CTX_use_cert_and_key\fR(\s-1SSL_CTX\s0 *ctx, X509 *x, \s-1EVP_PKEY\s0 *pkey, \s-1STACK_OF\s0(X509) *chain, int override);" 4
.IX Item "int SSL_CTX_use_cert_and_key(SSL_CTX *ctx, X509 *x, EVP_PKEY *pkey, STACK_OF(X509) *chain, int override);"
.IP "X509 *\fBSSL_CTX_get0_certificate\fR(const \s-1SSL_CTX\s0 *ctx);" 4
.IX Item "X509 *SSL_CTX_get0_certificate(const SSL_CTX *ctx);"
.IP "\s-1EVP_PKEY\s0 *\fBSSL_CTX_get0_privatekey\fR(const \s-1SSL_CTX\s0 *ctx);" 4
.IX Item "EVP_PKEY *SSL_CTX_get0_privatekey(const SSL_CTX *ctx);"
.IP "void \fBSSL_CTX_set_psk_client_callback\fR(\s-1SSL_CTX\s0 *ctx, unsigned int (*callback)(\s-1SSL\s0 *ssl, const char *hint, char *identity, unsigned int max_identity_len, unsigned char *psk, unsigned int max_psk_len));" 4
.IX Item "void SSL_CTX_set_psk_client_callback(SSL_CTX *ctx, unsigned int (*callback)(SSL *ssl, const char *hint, char *identity, unsigned int max_identity_len, unsigned char *psk, unsigned int max_psk_len));"
.IP "int \fBSSL_CTX_use_psk_identity_hint\fR(\s-1SSL_CTX\s0 *ctx, const char *hint);" 4
.IX Item "int SSL_CTX_use_psk_identity_hint(SSL_CTX *ctx, const char *hint);"
.IP "void \fBSSL_CTX_set_psk_server_callback\fR(\s-1SSL_CTX\s0 *ctx, unsigned int (*callback)(\s-1SSL\s0 *ssl, const char *identity, unsigned char *psk, int max_psk_len));" 4
.IX Item "void SSL_CTX_set_psk_server_callback(SSL_CTX *ctx, unsigned int (*callback)(SSL *ssl, const char *identity, unsigned char *psk, int max_psk_len));"
.PD
.SS "Dealing with Sessions"
.IX Subsection "Dealing with Sessions"
Here we document the various \s-1API\s0 functions which deal with the \s-1SSL/TLS\s0
sessions defined in the \fB\s-1SSL_SESSION\s0\fR structures.
.IP "int \fBSSL_SESSION_cmp\fR(const \s-1SSL_SESSION\s0 *a, const \s-1SSL_SESSION\s0 *b);" 4
.IX Item "int SSL_SESSION_cmp(const SSL_SESSION *a, const SSL_SESSION *b);"
.PD 0
.IP "void \fBSSL_SESSION_free\fR(\s-1SSL_SESSION\s0 *ss);" 4
.IX Item "void SSL_SESSION_free(SSL_SESSION *ss);"
.IP "char *\fBSSL_SESSION_get_app_data\fR(\s-1SSL_SESSION\s0 *s);" 4
.IX Item "char *SSL_SESSION_get_app_data(SSL_SESSION *s);"
.IP "char *\fBSSL_SESSION_get_ex_data\fR(const \s-1SSL_SESSION\s0 *s, int idx);" 4
.IX Item "char *SSL_SESSION_get_ex_data(const SSL_SESSION *s, int idx);"
.IP "int \fBSSL_SESSION_get_ex_new_index\fR(long argl, char *argp, int (*new_func);(void), int (*dup_func)(void), void (*free_func)(void))" 4
.IX Item "int SSL_SESSION_get_ex_new_index(long argl, char *argp, int (*new_func);(void), int (*dup_func)(void), void (*free_func)(void))"
.IP "long \fBSSL_SESSION_get_time\fR(const \s-1SSL_SESSION\s0 *s);" 4
.IX Item "long SSL_SESSION_get_time(const SSL_SESSION *s);"
.IP "long \fBSSL_SESSION_get_timeout\fR(const \s-1SSL_SESSION\s0 *s);" 4
.IX Item "long SSL_SESSION_get_timeout(const SSL_SESSION *s);"
.IP "unsigned long \fBSSL_SESSION_hash\fR(const \s-1SSL_SESSION\s0 *a);" 4
.IX Item "unsigned long SSL_SESSION_hash(const SSL_SESSION *a);"
.IP "\s-1SSL_SESSION\s0 *\fBSSL_SESSION_new\fR(void);" 4
.IX Item "SSL_SESSION *SSL_SESSION_new(void);"
.IP "int \fBSSL_SESSION_print\fR(\s-1BIO\s0 *bp, const \s-1SSL_SESSION\s0 *x);" 4
.IX Item "int SSL_SESSION_print(BIO *bp, const SSL_SESSION *x);"
.IP "int \fBSSL_SESSION_print_fp\fR(\s-1FILE\s0 *fp, const \s-1SSL_SESSION\s0 *x);" 4
.IX Item "int SSL_SESSION_print_fp(FILE *fp, const SSL_SESSION *x);"
.IP "int \fBSSL_SESSION_set_app_data\fR(\s-1SSL_SESSION\s0 *s, char *a);" 4
.IX Item "int SSL_SESSION_set_app_data(SSL_SESSION *s, char *a);"
.IP "int \fBSSL_SESSION_set_ex_data\fR(\s-1SSL_SESSION\s0 *s, int idx, char *arg);" 4
.IX Item "int SSL_SESSION_set_ex_data(SSL_SESSION *s, int idx, char *arg);"
.IP "long \fBSSL_SESSION_set_time\fR(\s-1SSL_SESSION\s0 *s, long t);" 4
.IX Item "long SSL_SESSION_set_time(SSL_SESSION *s, long t);"
.IP "long \fBSSL_SESSION_set_timeout\fR(\s-1SSL_SESSION\s0 *s, long t);" 4
.IX Item "long SSL_SESSION_set_timeout(SSL_SESSION *s, long t);"
.PD
.SS "Dealing with Connections"
.IX Subsection "Dealing with Connections"
Here we document the various \s-1API\s0 functions which deal with the \s-1SSL/TLS\s0
connection defined in the \fB\s-1SSL\s0\fR structure.
.IP "int \fBSSL_accept\fR(\s-1SSL\s0 *ssl);" 4
.IX Item "int SSL_accept(SSL *ssl);"
.PD 0
.IP "int \fBSSL_add_dir_cert_subjects_to_stack\fR(\s-1STACK\s0 *stack, const char *dir);" 4
.IX Item "int SSL_add_dir_cert_subjects_to_stack(STACK *stack, const char *dir);"
.IP "int \fBSSL_add_file_cert_subjects_to_stack\fR(\s-1STACK\s0 *stack, const char *file);" 4
.IX Item "int SSL_add_file_cert_subjects_to_stack(STACK *stack, const char *file);"
.IP "int \fBSSL_add_client_CA\fR(\s-1SSL\s0 *ssl, X509 *x);" 4
.IX Item "int SSL_add_client_CA(SSL *ssl, X509 *x);"
.IP "char *\fBSSL_alert_desc_string\fR(int value);" 4
.IX Item "char *SSL_alert_desc_string(int value);"
.IP "char *\fBSSL_alert_desc_string_long\fR(int value);" 4
.IX Item "char *SSL_alert_desc_string_long(int value);"
.IP "char *\fBSSL_alert_type_string\fR(int value);" 4
.IX Item "char *SSL_alert_type_string(int value);"
.IP "char *\fBSSL_alert_type_string_long\fR(int value);" 4
.IX Item "char *SSL_alert_type_string_long(int value);"
.IP "int \fBSSL_check_private_key\fR(const \s-1SSL\s0 *ssl);" 4
.IX Item "int SSL_check_private_key(const SSL *ssl);"
.IP "void \fBSSL_clear\fR(\s-1SSL\s0 *ssl);" 4
.IX Item "void SSL_clear(SSL *ssl);"
.IP "long \fBSSL_clear_num_renegotiations\fR(\s-1SSL\s0 *ssl);" 4
.IX Item "long SSL_clear_num_renegotiations(SSL *ssl);"
.IP "int \fBSSL_connect\fR(\s-1SSL\s0 *ssl);" 4
.IX Item "int SSL_connect(SSL *ssl);"
.IP "int \fBSSL_copy_session_id\fR(\s-1SSL\s0 *t, const \s-1SSL\s0 *f);" 4
.IX Item "int SSL_copy_session_id(SSL *t, const SSL *f);"
.PD
Sets the session details for \fBt\fR to be the same as in \fBf\fR. Returns 1 on
success or 0 on failure.
.IP "long \fBSSL_ctrl\fR(\s-1SSL\s0 *ssl, int cmd, long larg, char *parg);" 4
.IX Item "long SSL_ctrl(SSL *ssl, int cmd, long larg, char *parg);"
.PD 0
.IP "int \fBSSL_do_handshake\fR(\s-1SSL\s0 *ssl);" 4
.IX Item "int SSL_do_handshake(SSL *ssl);"
.IP "\s-1SSL\s0 *\fBSSL_dup\fR(\s-1SSL\s0 *ssl);" 4
.IX Item "SSL *SSL_dup(SSL *ssl);"
.PD
\&\fBSSL_dup()\fR allows applications to configure an \s-1SSL\s0 handle for use
in multiple \s-1SSL\s0 connections, and then duplicate it prior to initiating
each connection with the duplicated handle.
Use of \fBSSL_dup()\fR avoids the need to repeat the configuration of the
handles for each connection.
.Sp
For \fBSSL_dup()\fR to work, the connection \s-1MUST\s0 be in its initial state
and \s-1MUST NOT\s0 have not yet have started the \s-1SSL\s0 handshake.
For connections that are not in their initial state \fBSSL_dup()\fR just
increments an internal reference count and returns the \fIsame\fR
handle.
It may be possible to use \fBSSL_clear\fR\|(3) to recycle an \s-1SSL\s0 handle
that is not in its initial state for re-use, but this is best
avoided.
Instead, save and restore the session, if desired, and construct a
fresh handle for each connection.
.IP "\s-1STACK\s0 *\fBSSL_dup_CA_list\fR(\s-1STACK\s0 *sk);" 4
.IX Item "STACK *SSL_dup_CA_list(STACK *sk);"
.PD 0
.IP "void \fBSSL_free\fR(\s-1SSL\s0 *ssl);" 4
.IX Item "void SSL_free(SSL *ssl);"
.IP "\s-1SSL_CTX\s0 *\fBSSL_get_SSL_CTX\fR(const \s-1SSL\s0 *ssl);" 4
.IX Item "SSL_CTX *SSL_get_SSL_CTX(const SSL *ssl);"
.IP "char *\fBSSL_get_app_data\fR(\s-1SSL\s0 *ssl);" 4
.IX Item "char *SSL_get_app_data(SSL *ssl);"
.IP "X509 *\fBSSL_get_certificate\fR(const \s-1SSL\s0 *ssl);" 4
.IX Item "X509 *SSL_get_certificate(const SSL *ssl);"
.IP "const char *\fBSSL_get_cipher\fR(const \s-1SSL\s0 *ssl);" 4
.IX Item "const char *SSL_get_cipher(const SSL *ssl);"
.IP "int \fBSSL_is_dtls\fR(const \s-1SSL\s0 *ssl);" 4
.IX Item "int SSL_is_dtls(const SSL *ssl);"
.IP "int \fBSSL_get_cipher_bits\fR(const \s-1SSL\s0 *ssl, int *alg_bits);" 4
.IX Item "int SSL_get_cipher_bits(const SSL *ssl, int *alg_bits);"
.IP "char *\fBSSL_get_cipher_list\fR(const \s-1SSL\s0 *ssl, int n);" 4
.IX Item "char *SSL_get_cipher_list(const SSL *ssl, int n);"
.IP "char *\fBSSL_get_cipher_name\fR(const \s-1SSL\s0 *ssl);" 4
.IX Item "char *SSL_get_cipher_name(const SSL *ssl);"
.IP "char *\fBSSL_get_cipher_version\fR(const \s-1SSL\s0 *ssl);" 4
.IX Item "char *SSL_get_cipher_version(const SSL *ssl);"
.IP "\s-1STACK\s0 *\fBSSL_get_ciphers\fR(const \s-1SSL\s0 *ssl);" 4
.IX Item "STACK *SSL_get_ciphers(const SSL *ssl);"
.IP "\s-1STACK\s0 *\fBSSL_get_client_CA_list\fR(const \s-1SSL\s0 *ssl);" 4
.IX Item "STACK *SSL_get_client_CA_list(const SSL *ssl);"
.IP "\s-1SSL_CIPHER\s0 *\fBSSL_get_current_cipher\fR(\s-1SSL\s0 *ssl);" 4
.IX Item "SSL_CIPHER *SSL_get_current_cipher(SSL *ssl);"
.IP "long \fBSSL_get_default_timeout\fR(const \s-1SSL\s0 *ssl);" 4
.IX Item "long SSL_get_default_timeout(const SSL *ssl);"
.IP "int \fBSSL_get_error\fR(const \s-1SSL\s0 *ssl, int i);" 4
.IX Item "int SSL_get_error(const SSL *ssl, int i);"
.IP "char *\fBSSL_get_ex_data\fR(const \s-1SSL\s0 *ssl, int idx);" 4
.IX Item "char *SSL_get_ex_data(const SSL *ssl, int idx);"
.IP "int \fBSSL_get_ex_data_X509_STORE_CTX_idx\fR(void);" 4
.IX Item "int SSL_get_ex_data_X509_STORE_CTX_idx(void);"
.IP "int \fBSSL_get_ex_new_index\fR(long argl, char *argp, int (*new_func);(void), int (*dup_func)(void), void (*free_func)(void))" 4
.IX Item "int SSL_get_ex_new_index(long argl, char *argp, int (*new_func);(void), int (*dup_func)(void), void (*free_func)(void))"
.IP "int \fBSSL_get_fd\fR(const \s-1SSL\s0 *ssl);" 4
.IX Item "int SSL_get_fd(const SSL *ssl);"
.IP "void (*\fBSSL_get_info_callback\fR(const \s-1SSL\s0 *ssl);)()" 4
.IX Item "void (*SSL_get_info_callback(const SSL *ssl);)()"
.IP "int \fBSSL_get_key_update_type\fR(\s-1SSL\s0 *s);" 4
.IX Item "int SSL_get_key_update_type(SSL *s);"
.IP "\s-1STACK\s0 *\fBSSL_get_peer_cert_chain\fR(const \s-1SSL\s0 *ssl);" 4
.IX Item "STACK *SSL_get_peer_cert_chain(const SSL *ssl);"
.IP "X509 *\fBSSL_get_peer_certificate\fR(const \s-1SSL\s0 *ssl);" 4
.IX Item "X509 *SSL_get_peer_certificate(const SSL *ssl);"
.IP "const \s-1STACK_OF\s0(\s-1SCT\s0) *\fBSSL_get0_peer_scts\fR(\s-1SSL\s0 *s);" 4
.IX Item "const STACK_OF(SCT) *SSL_get0_peer_scts(SSL *s);"
.IP "\s-1EVP_PKEY\s0 *\fBSSL_get_privatekey\fR(const \s-1SSL\s0 *ssl);" 4
.IX Item "EVP_PKEY *SSL_get_privatekey(const SSL *ssl);"
.IP "int \fBSSL_get_quiet_shutdown\fR(const \s-1SSL\s0 *ssl);" 4
.IX Item "int SSL_get_quiet_shutdown(const SSL *ssl);"
.IP "\s-1BIO\s0 *\fBSSL_get_rbio\fR(const \s-1SSL\s0 *ssl);" 4
.IX Item "BIO *SSL_get_rbio(const SSL *ssl);"
.IP "int \fBSSL_get_read_ahead\fR(const \s-1SSL\s0 *ssl);" 4
.IX Item "int SSL_get_read_ahead(const SSL *ssl);"
.IP "\s-1SSL_SESSION\s0 *\fBSSL_get_session\fR(const \s-1SSL\s0 *ssl);" 4
.IX Item "SSL_SESSION *SSL_get_session(const SSL *ssl);"
.IP "char *\fBSSL_get_shared_ciphers\fR(const \s-1SSL\s0 *ssl, char *buf, int size);" 4
.IX Item "char *SSL_get_shared_ciphers(const SSL *ssl, char *buf, int size);"
.IP "int \fBSSL_get_shutdown\fR(const \s-1SSL\s0 *ssl);" 4
.IX Item "int SSL_get_shutdown(const SSL *ssl);"
.IP "const \s-1SSL_METHOD\s0 *\fBSSL_get_ssl_method\fR(\s-1SSL\s0 *ssl);" 4
.IX Item "const SSL_METHOD *SSL_get_ssl_method(SSL *ssl);"
.IP "int \fBSSL_get_state\fR(const \s-1SSL\s0 *ssl);" 4
.IX Item "int SSL_get_state(const SSL *ssl);"
.IP "long \fBSSL_get_time\fR(const \s-1SSL\s0 *ssl);" 4
.IX Item "long SSL_get_time(const SSL *ssl);"
.IP "long \fBSSL_get_timeout\fR(const \s-1SSL\s0 *ssl);" 4
.IX Item "long SSL_get_timeout(const SSL *ssl);"
.IP "int (*\fBSSL_get_verify_callback\fR(const \s-1SSL\s0 *ssl))(int, X509_STORE_CTX *)" 4
.IX Item "int (*SSL_get_verify_callback(const SSL *ssl))(int, X509_STORE_CTX *)"
.IP "int \fBSSL_get_verify_mode\fR(const \s-1SSL\s0 *ssl);" 4
.IX Item "int SSL_get_verify_mode(const SSL *ssl);"
.IP "long \fBSSL_get_verify_result\fR(const \s-1SSL\s0 *ssl);" 4
.IX Item "long SSL_get_verify_result(const SSL *ssl);"
.IP "char *\fBSSL_get_version\fR(const \s-1SSL\s0 *ssl);" 4
.IX Item "char *SSL_get_version(const SSL *ssl);"
.IP "\s-1BIO\s0 *\fBSSL_get_wbio\fR(const \s-1SSL\s0 *ssl);" 4
.IX Item "BIO *SSL_get_wbio(const SSL *ssl);"
.IP "int \fBSSL_in_accept_init\fR(\s-1SSL\s0 *ssl);" 4
.IX Item "int SSL_in_accept_init(SSL *ssl);"
.IP "int \fBSSL_in_before\fR(\s-1SSL\s0 *ssl);" 4
.IX Item "int SSL_in_before(SSL *ssl);"
.IP "int \fBSSL_in_connect_init\fR(\s-1SSL\s0 *ssl);" 4
.IX Item "int SSL_in_connect_init(SSL *ssl);"
.IP "int \fBSSL_in_init\fR(\s-1SSL\s0 *ssl);" 4
.IX Item "int SSL_in_init(SSL *ssl);"
.IP "int \fBSSL_is_init_finished\fR(\s-1SSL\s0 *ssl);" 4
.IX Item "int SSL_is_init_finished(SSL *ssl);"
.IP "int \fBSSL_key_update\fR(\s-1SSL\s0 *s, int updatetype);" 4
.IX Item "int SSL_key_update(SSL *s, int updatetype);"
.IP "\s-1STACK\s0 *\fBSSL_load_client_CA_file\fR(const char *file);" 4
.IX Item "STACK *SSL_load_client_CA_file(const char *file);"
.IP "\s-1SSL\s0 *\fBSSL_new\fR(\s-1SSL_CTX\s0 *ctx);" 4
.IX Item "SSL *SSL_new(SSL_CTX *ctx);"
.IP "int SSL_up_ref(\s-1SSL\s0 *s);" 4
.IX Item "int SSL_up_ref(SSL *s);"
.IP "long \fBSSL_num_renegotiations\fR(\s-1SSL\s0 *ssl);" 4
.IX Item "long SSL_num_renegotiations(SSL *ssl);"
.IP "int \fBSSL_peek\fR(\s-1SSL\s0 *ssl, void *buf, int num);" 4
.IX Item "int SSL_peek(SSL *ssl, void *buf, int num);"
.IP "int \fBSSL_pending\fR(const \s-1SSL\s0 *ssl);" 4
.IX Item "int SSL_pending(const SSL *ssl);"
.IP "int \fBSSL_read\fR(\s-1SSL\s0 *ssl, void *buf, int num);" 4
.IX Item "int SSL_read(SSL *ssl, void *buf, int num);"
.IP "int \fBSSL_renegotiate\fR(\s-1SSL\s0 *ssl);" 4
.IX Item "int SSL_renegotiate(SSL *ssl);"
.IP "char *\fBSSL_rstate_string\fR(\s-1SSL\s0 *ssl);" 4
.IX Item "char *SSL_rstate_string(SSL *ssl);"
.IP "char *\fBSSL_rstate_string_long\fR(\s-1SSL\s0 *ssl);" 4
.IX Item "char *SSL_rstate_string_long(SSL *ssl);"
.IP "long \fBSSL_session_reused\fR(\s-1SSL\s0 *ssl);" 4
.IX Item "long SSL_session_reused(SSL *ssl);"
.IP "void \fBSSL_set_accept_state\fR(\s-1SSL\s0 *ssl);" 4
.IX Item "void SSL_set_accept_state(SSL *ssl);"
.IP "void \fBSSL_set_app_data\fR(\s-1SSL\s0 *ssl, char *arg);" 4
.IX Item "void SSL_set_app_data(SSL *ssl, char *arg);"
.IP "void \fBSSL_set_bio\fR(\s-1SSL\s0 *ssl, \s-1BIO\s0 *rbio, \s-1BIO\s0 *wbio);" 4
.IX Item "void SSL_set_bio(SSL *ssl, BIO *rbio, BIO *wbio);"
.IP "int \fBSSL_set_cipher_list\fR(\s-1SSL\s0 *ssl, char *str);" 4
.IX Item "int SSL_set_cipher_list(SSL *ssl, char *str);"
.IP "void \fBSSL_set_client_CA_list\fR(\s-1SSL\s0 *ssl, \s-1STACK\s0 *list);" 4
.IX Item "void SSL_set_client_CA_list(SSL *ssl, STACK *list);"
.IP "void \fBSSL_set_connect_state\fR(\s-1SSL\s0 *ssl);" 4
.IX Item "void SSL_set_connect_state(SSL *ssl);"
.IP "int \fBSSL_set_ct_validation_callback\fR(\s-1SSL\s0 *ssl, ssl_ct_validation_cb callback, void *arg);" 4
.IX Item "int SSL_set_ct_validation_callback(SSL *ssl, ssl_ct_validation_cb callback, void *arg);"
.IP "int \fBSSL_set_ex_data\fR(\s-1SSL\s0 *ssl, int idx, char *arg);" 4
.IX Item "int SSL_set_ex_data(SSL *ssl, int idx, char *arg);"
.IP "int \fBSSL_set_fd\fR(\s-1SSL\s0 *ssl, int fd);" 4
.IX Item "int SSL_set_fd(SSL *ssl, int fd);"
.IP "void \fBSSL_set_info_callback\fR(\s-1SSL\s0 *ssl, void (*cb);(void))" 4
.IX Item "void SSL_set_info_callback(SSL *ssl, void (*cb);(void))"
.IP "void \fBSSL_set_msg_callback\fR(\s-1SSL\s0 *ctx, void (*cb)(int write_p, int version, int content_type, const void *buf, size_t len, \s-1SSL\s0 *ssl, void *arg));" 4
.IX Item "void SSL_set_msg_callback(SSL *ctx, void (*cb)(int write_p, int version, int content_type, const void *buf, size_t len, SSL *ssl, void *arg));"
.IP "void \fBSSL_set_msg_callback_arg\fR(\s-1SSL\s0 *ctx, void *arg);" 4
.IX Item "void SSL_set_msg_callback_arg(SSL *ctx, void *arg);"
.IP "unsigned long \fBSSL_clear_options\fR(\s-1SSL\s0 *ssl, unsigned long op);" 4
.IX Item "unsigned long SSL_clear_options(SSL *ssl, unsigned long op);"
.IP "unsigned long \fBSSL_get_options\fR(\s-1SSL\s0 *ssl);" 4
.IX Item "unsigned long SSL_get_options(SSL *ssl);"
.IP "unsigned long \fBSSL_set_options\fR(\s-1SSL\s0 *ssl, unsigned long op);" 4
.IX Item "unsigned long SSL_set_options(SSL *ssl, unsigned long op);"
.IP "void \fBSSL_set_quiet_shutdown\fR(\s-1SSL\s0 *ssl, int mode);" 4
.IX Item "void SSL_set_quiet_shutdown(SSL *ssl, int mode);"
.IP "void \fBSSL_set_read_ahead\fR(\s-1SSL\s0 *ssl, int yes);" 4
.IX Item "void SSL_set_read_ahead(SSL *ssl, int yes);"
.IP "int \fBSSL_set_rfd\fR(\s-1SSL\s0 *ssl, int fd);" 4
.IX Item "int SSL_set_rfd(SSL *ssl, int fd);"
.IP "int \fBSSL_set_session\fR(\s-1SSL\s0 *ssl, \s-1SSL_SESSION\s0 *session);" 4
.IX Item "int SSL_set_session(SSL *ssl, SSL_SESSION *session);"
.IP "void \fBSSL_set_shutdown\fR(\s-1SSL\s0 *ssl, int mode);" 4
.IX Item "void SSL_set_shutdown(SSL *ssl, int mode);"
.IP "int \fBSSL_set_ssl_method\fR(\s-1SSL\s0 *ssl, const \s-1SSL_METHOD\s0 *meth);" 4
.IX Item "int SSL_set_ssl_method(SSL *ssl, const SSL_METHOD *meth);"
.IP "void \fBSSL_set_time\fR(\s-1SSL\s0 *ssl, long t);" 4
.IX Item "void SSL_set_time(SSL *ssl, long t);"
.IP "void \fBSSL_set_timeout\fR(\s-1SSL\s0 *ssl, long t);" 4
.IX Item "void SSL_set_timeout(SSL *ssl, long t);"
.IP "void \fBSSL_set_verify\fR(\s-1SSL\s0 *ssl, int mode, int (*callback);(void))" 4
.IX Item "void SSL_set_verify(SSL *ssl, int mode, int (*callback);(void))"
.IP "void \fBSSL_set_verify_result\fR(\s-1SSL\s0 *ssl, long arg);" 4
.IX Item "void SSL_set_verify_result(SSL *ssl, long arg);"
.IP "int \fBSSL_set_wfd\fR(\s-1SSL\s0 *ssl, int fd);" 4
.IX Item "int SSL_set_wfd(SSL *ssl, int fd);"
.IP "int \fBSSL_shutdown\fR(\s-1SSL\s0 *ssl);" 4
.IX Item "int SSL_shutdown(SSL *ssl);"
.IP "\s-1OSSL_HANDSHAKE_STATE\s0 \fBSSL_get_state\fR(const \s-1SSL\s0 *ssl);" 4
.IX Item "OSSL_HANDSHAKE_STATE SSL_get_state(const SSL *ssl);"
.PD
Returns the current handshake state.
.IP "char *\fBSSL_state_string\fR(const \s-1SSL\s0 *ssl);" 4
.IX Item "char *SSL_state_string(const SSL *ssl);"
.PD 0
.IP "char *\fBSSL_state_string_long\fR(const \s-1SSL\s0 *ssl);" 4
.IX Item "char *SSL_state_string_long(const SSL *ssl);"
.IP "long \fBSSL_total_renegotiations\fR(\s-1SSL\s0 *ssl);" 4
.IX Item "long SSL_total_renegotiations(SSL *ssl);"
.IP "int \fBSSL_use_PrivateKey\fR(\s-1SSL\s0 *ssl, \s-1EVP_PKEY\s0 *pkey);" 4
.IX Item "int SSL_use_PrivateKey(SSL *ssl, EVP_PKEY *pkey);"
.IP "int \fBSSL_use_PrivateKey_ASN1\fR(int type, \s-1SSL\s0 *ssl, unsigned char *d, long len);" 4
.IX Item "int SSL_use_PrivateKey_ASN1(int type, SSL *ssl, unsigned char *d, long len);"
.IP "int \fBSSL_use_PrivateKey_file\fR(\s-1SSL\s0 *ssl, const char *file, int type);" 4
.IX Item "int SSL_use_PrivateKey_file(SSL *ssl, const char *file, int type);"
.IP "int \fBSSL_use_RSAPrivateKey\fR(\s-1SSL\s0 *ssl, \s-1RSA\s0 *rsa);" 4
.IX Item "int SSL_use_RSAPrivateKey(SSL *ssl, RSA *rsa);"
.IP "int \fBSSL_use_RSAPrivateKey_ASN1\fR(\s-1SSL\s0 *ssl, unsigned char *d, long len);" 4
.IX Item "int SSL_use_RSAPrivateKey_ASN1(SSL *ssl, unsigned char *d, long len);"
.IP "int \fBSSL_use_RSAPrivateKey_file\fR(\s-1SSL\s0 *ssl, const char *file, int type);" 4
.IX Item "int SSL_use_RSAPrivateKey_file(SSL *ssl, const char *file, int type);"
.IP "int \fBSSL_use_certificate\fR(\s-1SSL\s0 *ssl, X509 *x);" 4
.IX Item "int SSL_use_certificate(SSL *ssl, X509 *x);"
.IP "int \fBSSL_use_certificate_ASN1\fR(\s-1SSL\s0 *ssl, int len, unsigned char *d);" 4
.IX Item "int SSL_use_certificate_ASN1(SSL *ssl, int len, unsigned char *d);"
.IP "int \fBSSL_use_certificate_file\fR(\s-1SSL\s0 *ssl, const char *file, int type);" 4
.IX Item "int SSL_use_certificate_file(SSL *ssl, const char *file, int type);"
.IP "int \fBSSL_use_cert_and_key\fR(\s-1SSL\s0 *ssl, X509 *x, \s-1EVP_PKEY\s0 *pkey, \s-1STACK_OF\s0(X509) *chain, int override);" 4
.IX Item "int SSL_use_cert_and_key(SSL *ssl, X509 *x, EVP_PKEY *pkey, STACK_OF(X509) *chain, int override);"
.IP "int \fBSSL_version\fR(const \s-1SSL\s0 *ssl);" 4
.IX Item "int SSL_version(const SSL *ssl);"
.IP "int \fBSSL_want\fR(const \s-1SSL\s0 *ssl);" 4
.IX Item "int SSL_want(const SSL *ssl);"
.IP "int \fBSSL_want_nothing\fR(const \s-1SSL\s0 *ssl);" 4
.IX Item "int SSL_want_nothing(const SSL *ssl);"
.IP "int \fBSSL_want_read\fR(const \s-1SSL\s0 *ssl);" 4
.IX Item "int SSL_want_read(const SSL *ssl);"
.IP "int \fBSSL_want_write\fR(const \s-1SSL\s0 *ssl);" 4
.IX Item "int SSL_want_write(const SSL *ssl);"
.IP "int \fBSSL_want_x509_lookup\fR(const \s-1SSL\s0 *ssl);" 4
.IX Item "int SSL_want_x509_lookup(const SSL *ssl);"
.IP "int \fBSSL_write\fR(\s-1SSL\s0 *ssl, const void *buf, int num);" 4
.IX Item "int SSL_write(SSL *ssl, const void *buf, int num);"
.IP "void \fBSSL_set_psk_client_callback\fR(\s-1SSL\s0 *ssl, unsigned int (*callback)(\s-1SSL\s0 *ssl, const char *hint, char *identity, unsigned int max_identity_len, unsigned char *psk, unsigned int max_psk_len));" 4
.IX Item "void SSL_set_psk_client_callback(SSL *ssl, unsigned int (*callback)(SSL *ssl, const char *hint, char *identity, unsigned int max_identity_len, unsigned char *psk, unsigned int max_psk_len));"
.IP "int \fBSSL_use_psk_identity_hint\fR(\s-1SSL\s0 *ssl, const char *hint);" 4
.IX Item "int SSL_use_psk_identity_hint(SSL *ssl, const char *hint);"
.IP "void \fBSSL_set_psk_server_callback\fR(\s-1SSL\s0 *ssl, unsigned int (*callback)(\s-1SSL\s0 *ssl, const char *identity, unsigned char *psk, int max_psk_len));" 4
.IX Item "void SSL_set_psk_server_callback(SSL *ssl, unsigned int (*callback)(SSL *ssl, const char *identity, unsigned char *psk, int max_psk_len));"
.IP "const char *\fBSSL_get_psk_identity_hint\fR(\s-1SSL\s0 *ssl);" 4
.IX Item "const char *SSL_get_psk_identity_hint(SSL *ssl);"
.IP "const char *\fBSSL_get_psk_identity\fR(\s-1SSL\s0 *ssl);" 4
.IX Item "const char *SSL_get_psk_identity(SSL *ssl);"
.PD
.SH "RETURN VALUES"
.IX Header "RETURN VALUES"
See the individual manual pages for details.
.SH "SEE ALSO"
.IX Header "SEE ALSO"
\&\fBopenssl\fR\|(1), \fBcrypto\fR\|(7),
\&\fBCRYPTO_get_ex_new_index\fR\|(3),
\&\fBSSL_accept\fR\|(3), \fBSSL_clear\fR\|(3),
\&\fBSSL_connect\fR\|(3),
\&\fBSSL_CIPHER_get_name\fR\|(3),
\&\fBSSL_COMP_add_compression_method\fR\|(3),
\&\fBSSL_CTX_add_extra_chain_cert\fR\|(3),
\&\fBSSL_CTX_add_session\fR\|(3),
\&\fBSSL_CTX_ctrl\fR\|(3),
\&\fBSSL_CTX_flush_sessions\fR\|(3),
\&\fBSSL_CTX_get_verify_mode\fR\|(3),
\&\fBSSL_CTX_load_verify_locations\fR\|(3)
\&\fBSSL_CTX_new\fR\|(3),
\&\fBSSL_CTX_sess_number\fR\|(3),
\&\fBSSL_CTX_sess_set_cache_size\fR\|(3),
\&\fBSSL_CTX_sess_set_get_cb\fR\|(3),
\&\fBSSL_CTX_sessions\fR\|(3),
\&\fBSSL_CTX_set_cert_store\fR\|(3),
\&\fBSSL_CTX_set_cert_verify_callback\fR\|(3),
\&\fBSSL_CTX_set_cipher_list\fR\|(3),
\&\fBSSL_CTX_set_client_CA_list\fR\|(3),
\&\fBSSL_CTX_set_client_cert_cb\fR\|(3),
\&\fBSSL_CTX_set_default_passwd_cb\fR\|(3),
\&\fBSSL_CTX_set_generate_session_id\fR\|(3),
\&\fBSSL_CTX_set_info_callback\fR\|(3),
\&\fBSSL_CTX_set_max_cert_list\fR\|(3),
\&\fBSSL_CTX_set_mode\fR\|(3),
\&\fBSSL_CTX_set_msg_callback\fR\|(3),
\&\fBSSL_CTX_set_options\fR\|(3),
\&\fBSSL_CTX_set_quiet_shutdown\fR\|(3),
\&\fBSSL_CTX_set_read_ahead\fR\|(3),
\&\fBSSL_CTX_set_security_level\fR\|(3),
\&\fBSSL_CTX_set_session_cache_mode\fR\|(3),
\&\fBSSL_CTX_set_session_id_context\fR\|(3),
\&\fBSSL_CTX_set_ssl_version\fR\|(3),
\&\fBSSL_CTX_set_timeout\fR\|(3),
\&\fBSSL_CTX_set_tmp_dh_callback\fR\|(3),
\&\fBSSL_CTX_set_verify\fR\|(3),
\&\fBSSL_CTX_use_certificate\fR\|(3),
\&\fBSSL_alert_type_string\fR\|(3),
\&\fBSSL_do_handshake\fR\|(3),
\&\fBSSL_enable_ct\fR\|(3),
\&\fBSSL_get_SSL_CTX\fR\|(3),
\&\fBSSL_get_ciphers\fR\|(3),
\&\fBSSL_get_client_CA_list\fR\|(3),
\&\fBSSL_get_default_timeout\fR\|(3),
\&\fBSSL_get_error\fR\|(3),
\&\fBSSL_get_ex_data_X509_STORE_CTX_idx\fR\|(3),
\&\fBSSL_get_fd\fR\|(3),
\&\fBSSL_get_peer_cert_chain\fR\|(3),
\&\fBSSL_get_rbio\fR\|(3),
\&\fBSSL_get_session\fR\|(3),
\&\fBSSL_get_verify_result\fR\|(3),
\&\fBSSL_get_version\fR\|(3),
\&\fBSSL_load_client_CA_file\fR\|(3),
\&\fBSSL_new\fR\|(3),
\&\fBSSL_pending\fR\|(3),
\&\fBSSL_read_ex\fR\|(3),
\&\fBSSL_read\fR\|(3),
\&\fBSSL_rstate_string\fR\|(3),
\&\fBSSL_session_reused\fR\|(3),
\&\fBSSL_set_bio\fR\|(3),
\&\fBSSL_set_connect_state\fR\|(3),
\&\fBSSL_set_fd\fR\|(3),
\&\fBSSL_set_session\fR\|(3),
\&\fBSSL_set_shutdown\fR\|(3),
\&\fBSSL_shutdown\fR\|(3),
\&\fBSSL_state_string\fR\|(3),
\&\fBSSL_want\fR\|(3),
\&\fBSSL_write_ex\fR\|(3),
\&\fBSSL_write\fR\|(3),
\&\fBSSL_SESSION_free\fR\|(3),
\&\fBSSL_SESSION_get_time\fR\|(3),
\&\fBd2i_SSL_SESSION\fR\|(3),
\&\fBSSL_CTX_set_psk_client_callback\fR\|(3),
\&\fBSSL_CTX_use_psk_identity_hint\fR\|(3),
\&\fBSSL_get_psk_identity\fR\|(3),
\&\fBDTLSv1_listen\fR\|(3)
.SH "HISTORY"
.IX Header "HISTORY"
\&\fBSSLv2_client_method\fR, \fBSSLv2_server_method\fR and \fBSSLv2_method\fR were removed
in OpenSSL 1.1.0.
.PP
The return type of \fBSSL_copy_session_id\fR was changed from void to int in
OpenSSL 1.1.0.
.SH "COPYRIGHT"
.IX Header "COPYRIGHT"
Copyright 2000\-2018 The OpenSSL Project Authors. All Rights Reserved.
.PP
Licensed under the OpenSSL license (the \*(L"License\*(R"). You may not use
this file except in compliance with the License. You can obtain a copy
in the file \s-1LICENSE\s0 in the source distribution or at
<https://www.openssl.org/source/license.html>.

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.\" Automatically generated by Pod::Man 4.14 (Pod::Simple 3.42)
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.\" ========================================================================
.\"
.IX Title "X509 7"
.TH X509 7 "2020-04-21" "1.1.1g" "OpenSSL"
.\" For nroff, turn off justification. Always turn off hyphenation; it makes
.\" way too many mistakes in technical documents.
.if n .ad l
.nh
.SH "NAME"
x509 \- X.509 certificate handling
.SH "SYNOPSIS"
.IX Header "SYNOPSIS"
.Vb 1
\& #include <openssl/x509.h>
.Ve
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
An X.509 certificate is a structured grouping of information about
an individual, a device, or anything one can imagine. A X.509 \s-1CRL\s0
(certificate revocation list) is a tool to help determine if a
certificate is still valid. The exact definition of those can be
found in the X.509 document from ITU-T, or in \s-1RFC3280\s0 from \s-1PKIX.\s0
In OpenSSL, the type X509 is used to express such a certificate, and
the type X509_CRL is used to express a \s-1CRL.\s0
.PP
A related structure is a certificate request, defined in PKCS#10 from
\&\s-1RSA\s0 Security, Inc, also reflected in \s-1RFC2896.\s0 In OpenSSL, the type
X509_REQ is used to express such a certificate request.
.PP
To handle some complex parts of a certificate, there are the types
X509_NAME (to express a certificate name), X509_ATTRIBUTE (to express
a certificate attributes), X509_EXTENSION (to express a certificate
extension) and a few more.
.PP
Finally, there's the supertype X509_INFO, which can contain a \s-1CRL,\s0 a
certificate and a corresponding private key.
.PP
\&\fBX509_\fR\fI\s-1XXX\s0\fR, \fBd2i_X509_\fR\fI\s-1XXX\s0\fR, and \fBi2d_X509_\fR\fI\s-1XXX\s0\fR functions
handle X.509 certificates, with some exceptions, shown below.
.PP
\&\fBX509_CRL_\fR\fI\s-1XXX\s0\fR, \fBd2i_X509_CRL_\fR\fI\s-1XXX\s0\fR, and \fBi2d_X509_CRL_\fR\fI\s-1XXX\s0\fR
functions handle X.509 CRLs.
.PP
\&\fBX509_REQ_\fR\fI\s-1XXX\s0\fR, \fBd2i_X509_REQ_\fR\fI\s-1XXX\s0\fR, and \fBi2d_X509_REQ_\fR\fI\s-1XXX\s0\fR
functions handle PKCS#10 certificate requests.
.PP
\&\fBX509_NAME_\fR\fI\s-1XXX\s0\fR functions handle certificate names.
.PP
\&\fBX509_ATTRIBUTE_\fR\fI\s-1XXX\s0\fR functions handle certificate attributes.
.PP
\&\fBX509_EXTENSION_\fR\fI\s-1XXX\s0\fR functions handle certificate extensions.
.SH "SEE ALSO"
.IX Header "SEE ALSO"
\&\fBX509_NAME_ENTRY_get_object\fR\|(3),
\&\fBX509_NAME_add_entry_by_txt\fR\|(3),
\&\fBX509_NAME_add_entry_by_NID\fR\|(3),
\&\fBX509_NAME_print_ex\fR\|(3),
\&\fBX509_NAME_new\fR\|(3),
\&\fBd2i_X509\fR\|(3),
\&\fBd2i_X509_ALGOR\fR\|(3),
\&\fBd2i_X509_CRL\fR\|(3),
\&\fBd2i_X509_NAME\fR\|(3),
\&\fBd2i_X509_REQ\fR\|(3),
\&\fBd2i_X509_SIG\fR\|(3),
\&\fBX509v3\fR\|(3),
\&\fBcrypto\fR\|(7)
.SH "COPYRIGHT"
.IX Header "COPYRIGHT"
Copyright 2003\-2017 The OpenSSL Project Authors. All Rights Reserved.
.PP
Licensed under the OpenSSL license (the \*(L"License\*(R"). You may not use
this file except in compliance with the License. You can obtain a copy
in the file \s-1LICENSE\s0 in the source distribution or at
<https://www.openssl.org/source/license.html>.