forked from cory/tildefriends
311 lines
12 KiB
Groff
311 lines
12 KiB
Groff
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.\" ========================================================================
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.\"
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.IX Title "X509_LOOKUP 3"
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.TH X509_LOOKUP 3 "2020-04-21" "1.1.1g" "OpenSSL"
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.\" For nroff, turn off justification. Always turn off hyphenation; it makes
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.\" way too many mistakes in technical documents.
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.if n .ad l
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.nh
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.SH "NAME"
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X509_LOOKUP, X509_LOOKUP_TYPE, X509_LOOKUP_new, X509_LOOKUP_free, X509_LOOKUP_init, X509_LOOKUP_shutdown, X509_LOOKUP_set_method_data, X509_LOOKUP_get_method_data, X509_LOOKUP_ctrl, X509_LOOKUP_load_file, X509_LOOKUP_add_dir, X509_LOOKUP_get_store, X509_LOOKUP_by_subject, X509_LOOKUP_by_issuer_serial, X509_LOOKUP_by_fingerprint, X509_LOOKUP_by_alias \&\- OpenSSL certificate lookup mechanisms
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.SH "SYNOPSIS"
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.IX Header "SYNOPSIS"
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.Vb 1
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\& #include <openssl/x509_vfy.h>
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\&
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\& typedef x509_lookup_st X509_LOOKUP;
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\&
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\& typedef enum X509_LOOKUP_TYPE;
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\&
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\& X509_LOOKUP *X509_LOOKUP_new(X509_LOOKUP_METHOD *method);
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\& int X509_LOOKUP_init(X509_LOOKUP *ctx);
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\& int X509_LOOKUP_shutdown(X509_LOOKUP *ctx);
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\& void X509_LOOKUP_free(X509_LOOKUP *ctx);
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\&
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\& int X509_LOOKUP_set_method_data(X509_LOOKUP *ctx, void *data);
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\& void *X509_LOOKUP_get_method_data(const X509_LOOKUP *ctx);
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\&
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\& int X509_LOOKUP_ctrl(X509_LOOKUP *ctx, int cmd, const char *argc,
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\& long argl, char **ret);
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\& int X509_LOOKUP_load_file(X509_LOOKUP *ctx, char *name, long type);
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\& int X509_LOOKUP_add_dir(X509_LOOKUP *ctx, char *name, long type);
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\&
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\& X509_STORE *X509_LOOKUP_get_store(const X509_LOOKUP *ctx);
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\&
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\& int X509_LOOKUP_by_subject(X509_LOOKUP *ctx, X509_LOOKUP_TYPE type,
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\& X509_NAME *name, X509_OBJECT *ret);
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\& int X509_LOOKUP_by_issuer_serial(X509_LOOKUP *ctx, X509_LOOKUP_TYPE type,
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\& X509_NAME *name, ASN1_INTEGER *serial,
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\& X509_OBJECT *ret);
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\& int X509_LOOKUP_by_fingerprint(X509_LOOKUP *ctx, X509_LOOKUP_TYPE type,
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\& const unsigned char *bytes, int len,
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\& X509_OBJECT *ret);
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\& int X509_LOOKUP_by_alias(X509_LOOKUP *ctx, X509_LOOKUP_TYPE type,
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\& const char *str, int len, X509_OBJECT *ret);
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.Ve
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.SH "DESCRIPTION"
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.IX Header "DESCRIPTION"
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The \fBX509_LOOKUP\fR structure holds the information needed to look up
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certificates and CRLs according to an associated \fBX509_LOOKUP_METHOD\fR\|(3).
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Multiple \fBX509_LOOKUP\fR instances can be added to an \fBX509_STORE\fR\|(3)
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to enable lookup in that store.
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.PP
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\&\fBX509_LOOKUP_new()\fR creates a new \fBX509_LOOKUP\fR using the given lookup
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\&\fImethod\fR.
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It can also be created by calling \fBX509_STORE_add_lookup\fR\|(3), which
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will associate an \fBX509_STORE\fR with the lookup mechanism.
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.PP
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\&\fBX509_LOOKUP_init()\fR initializes the internal state and resources as
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needed by the given \fBX509_LOOKUP\fR to do its work.
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.PP
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\&\fBX509_LOOKUP_shutdown()\fR tears down the internal state and resources of
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the given \fBX509_LOOKUP\fR.
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.PP
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\&\fBX509_LOOKUP_free()\fR destructs the given \fBX509_LOOKUP\fR.
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.PP
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\&\fBX509_LOOKUP_set_method_data()\fR associates a pointer to application data
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to the given \fBX509_LOOKUP\fR.
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.PP
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\&\fBX509_LOOKUP_get_method_data()\fR retrieves a pointer to application data
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from the given \fBX509_LOOKUP\fR.
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.PP
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\&\fBX509_LOOKUP_ctrl()\fR is used to set or get additional data to or from an
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\&\fBX509_LOOKUP\fR structure or its associated \fBX509_LOOKUP_METHOD\fR\|(3).
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The arguments of the control command are passed via \fIargc\fR and \fIargl\fR,
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its return value via \fI*ret\fR.
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The meaning of the arguments depends on the \fIcmd\fR number of the
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control command. In general, this function is not called directly, but
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wrapped by a macro call, see below.
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The control \fIcmd\fRs known to OpenSSL are discussed in more depth
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in \*(L"Control Commands\*(R".
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.PP
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\&\fBX509_LOOKUP_load_file()\fR passes a filename to be loaded immediately
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into the associated \fBX509_STORE\fR.
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\&\fItype\fR indicates what type of object is expected.
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This can only be used with a lookup using the implementation
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\&\fBX509_LOOKUP_file\fR\|(3).
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.PP
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\&\fBX509_LOOKUP_add_dir()\fR passes a directory specification from which
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certificates and CRLs are loaded on demand into the associated
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\&\fBX509_STORE\fR.
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\&\fItype\fR indicates what type of object is expected.
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This can only be used with a lookup using the implementation
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\&\fBX509_LOOKUP_hash_dir\fR\|(3).
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.PP
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\&\fBX509_LOOKUP_load_file()\fR, \fBX509_LOOKUP_add_dir()\fR,
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\&\fBX509_LOOKUP_add_store()\fR, and \fBX509_LOOKUP_load_store()\fR are implemented
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as macros that use \fBX509_LOOKUP_ctrl()\fR.
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.PP
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\&\fBX509_LOOKUP_by_subject()\fR, \fBX509_LOOKUP_by_issuer_serial()\fR,
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\&\fBX509_LOOKUP_by_fingerprint()\fR, and \fBX509_LOOKUP_by_alias()\fR look up
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certificates and CRLs in the \fBX509_STORE\fR\|(3) associated with the
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\&\fBX509_LOOKUP\fR using different criteria, where the looked up object is
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stored in \fIret\fR.
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Some of the underlying \fBX509_LOOKUP_METHOD\fRs will also cache objects
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matching the criteria in the associated \fBX509_STORE\fR, which makes it
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possible to handle cases where the criteria have more than one hit.
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.SS "File Types"
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.IX Subsection "File Types"
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\&\fBX509_LOOKUP_load_file()\fR and \fBX509_LOOKUP_add_dir()\fR take a \fItype\fR,
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which can be one of the following:
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.IP "\fBX509_FILETYPE_PEM\fR" 4
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.IX Item "X509_FILETYPE_PEM"
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The file or files that are loaded are expected to be in \s-1PEM\s0 format.
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.IP "\fBX509_FILETYPE_ASN1\fR" 4
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.IX Item "X509_FILETYPE_ASN1"
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The file or files that are loaded are expected to be in raw \s-1DER\s0 format.
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.IP "\fBX509_FILETYPE_DEFAULT\fR" 4
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.IX Item "X509_FILETYPE_DEFAULT"
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The default certificate file or directory is used. In this case,
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\&\fIname\fR is ignored.
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.SS "Control Commands"
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.IX Subsection "Control Commands"
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The \fBX509_LOOKUP_METHOD\fRs built into OpenSSL recognise the following
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\&\fBX509_LOOKUP_ctrl()\fR \fIcmd\fRs:
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.IP "\fBX509_L_FILE_LOAD\fR" 4
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.IX Item "X509_L_FILE_LOAD"
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This is the command that \fBX509_LOOKUP_load_file()\fR uses.
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The filename is passed in \fIargc\fR, and the type in \fIargl\fR.
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.IP "\fBX509_L_ADD_DIR\fR" 4
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.IX Item "X509_L_ADD_DIR"
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This is the command that \fBX509_LOOKUP_add_dir()\fR uses.
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The directory specification is passed in \fIargc\fR, and the type in
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\&\fIargl\fR.
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.IP "\fBX509_L_ADD_STORE\fR" 4
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.IX Item "X509_L_ADD_STORE"
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This is the command that \fBX509_LOOKUP_add_store()\fR uses.
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The \s-1URI\s0 is passed in \fIargc\fR.
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.IP "\fBX509_L_LOAD_STORE\fR" 4
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.IX Item "X509_L_LOAD_STORE"
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This is the command that \fBX509_LOOKUP_load_store()\fR uses.
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The \s-1URI\s0 is passed in \fIargc\fR.
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.SH "RETURN VALUES"
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.IX Header "RETURN VALUES"
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\&\fBX509_LOOKUP_new()\fR returns an \fBX509_LOOKUP\fR pointer when successful,
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or \s-1NULL\s0 on error.
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.PP
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\&\fBX509_LOOKUP_init()\fR and \fBX509_LOOKUP_shutdown()\fR return 1 on success, or
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0 on error.
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.PP
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\&\fBX509_LOOKUP_ctrl()\fR returns \-1 if the \fBX509_LOOKUP\fR doesn't have an
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associated \fBX509_LOOKUP_METHOD\fR, or 1 if the
|
||
|
|
doesn't have a control function.
|
||
|
|
Otherwise, it returns what the control function in the
|
||
|
|
\&\fBX509_LOOKUP_METHOD\fR returns, which is usually 1 on success and 0 in
|
||
|
|
error.
|
||
|
|
.IX Xref "509_LOOKUP_METHOD"
|
||
|
|
.PP
|
||
|
|
\&\fBX509_LOOKUP_get_store()\fR returns an \fBX509_STORE\fR pointer if there is
|
||
|
|
one, otherwise \s-1NULL.\s0
|
||
|
|
.PP
|
||
|
|
\&\fBX509_LOOKUP_by_subject()\fR, \fBX509_LOOKUP_by_issuer_serial()\fR,
|
||
|
|
\&\fBX509_LOOKUP_by_fingerprint()\fR, and \fBX509_LOOKUP_by_alias()\fR all return 0
|
||
|
|
if there is no \fBX509_LOOKUP_METHOD\fR or that method doesn't implement
|
||
|
|
the corresponding function.
|
||
|
|
Otherwise, it returns what the corresponding function in the
|
||
|
|
\&\fBX509_LOOKUP_METHOD\fR returns, which is usually 1 on success and 0 in
|
||
|
|
error.
|
||
|
|
.SH "SEE ALSO"
|
||
|
|
.IX Header "SEE ALSO"
|
||
|
|
\&\fBX509_LOOKUP_METHOD\fR\|(3), \fBX509_STORE\fR\|(3)
|
||
|
|
.SH "COPYRIGHT"
|
||
|
|
.IX Header "COPYRIGHT"
|
||
|
|
Copyright 2020 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>.
|