forked from cory/tildefriends
Add prebuild OpenSSL, and remove SCHANNEL code and whatever it was on MacOS. Build mingw for 64-bit.
git-svn-id: https://www.unprompted.com/svn/projects/tildefriends/trunk@4088 ed5197a5-7fde-0310-b194-c3ffbd925b24
This commit is contained in:
218
deps/openssl/mingw64/share/man/man3/PKCS7_encrypt.3
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.\" ========================================================================
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.\"
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.IX Title "PKCS7_ENCRYPT 3"
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.TH PKCS7_ENCRYPT 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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PKCS7_encrypt \- create a PKCS#7 envelopedData structure
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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/pkcs7.h>
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\&
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\& PKCS7 *PKCS7_encrypt(STACK_OF(X509) *certs, BIO *in, const EVP_CIPHER *cipher,
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\& int flags);
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.Ve
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.SH "DESCRIPTION"
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.IX Header "DESCRIPTION"
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\&\fBPKCS7_encrypt()\fR creates and returns a PKCS#7 envelopedData structure. \fBcerts\fR
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is a list of recipient certificates. \fBin\fR is the content to be encrypted.
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\&\fBcipher\fR is the symmetric cipher to use. \fBflags\fR is an optional set of flags.
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.SH "NOTES"
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.IX Header "NOTES"
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Only \s-1RSA\s0 keys are supported in PKCS#7 and envelopedData so the recipient
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certificates supplied to this function must all contain \s-1RSA\s0 public keys, though
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they do not have to be signed using the \s-1RSA\s0 algorithm.
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.PP
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\&\fBEVP_des_ede3_cbc()\fR (triple \s-1DES\s0) is the algorithm of choice for S/MIME use
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because most clients will support it.
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.PP
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Some old \*(L"export grade\*(R" clients may only support weak encryption using 40 or 64
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bit \s-1RC2.\s0 These can be used by passing \fBEVP_rc2_40_cbc()\fR and \fBEVP_rc2_64_cbc()\fR
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respectively.
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.PP
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The algorithm passed in the \fBcipher\fR parameter must support \s-1ASN1\s0 encoding of
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its parameters.
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.PP
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Many browsers implement a \*(L"sign and encrypt\*(R" option which is simply an S/MIME
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envelopedData containing an S/MIME signed message. This can be readily produced
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by storing the S/MIME signed message in a memory \s-1BIO\s0 and passing it to
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\&\fBPKCS7_encrypt()\fR.
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.PP
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The following flags can be passed in the \fBflags\fR parameter.
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.PP
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If the \fB\s-1PKCS7_TEXT\s0\fR flag is set \s-1MIME\s0 headers for type \fBtext/plain\fR are
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prepended to the data.
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.PP
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Normally the supplied content is translated into \s-1MIME\s0 canonical format (as
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required by the S/MIME specifications) if \fB\s-1PKCS7_BINARY\s0\fR is set no translation
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occurs. This option should be used if the supplied data is in binary format
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otherwise the translation will corrupt it. If \fB\s-1PKCS7_BINARY\s0\fR is set then
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\&\fB\s-1PKCS7_TEXT\s0\fR is ignored.
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.PP
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If the \fB\s-1PKCS7_STREAM\s0\fR flag is set a partial \fB\s-1PKCS7\s0\fR structure is output
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suitable for streaming I/O: no data is read from the \s-1BIO\s0 \fBin\fR.
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.SH "NOTES"
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.IX Header "NOTES"
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If the flag \fB\s-1PKCS7_STREAM\s0\fR is set the returned \fB\s-1PKCS7\s0\fR structure is \fBnot\fR
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complete and outputting its contents via a function that does not
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properly finalize the \fB\s-1PKCS7\s0\fR structure will give unpredictable
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results.
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.PP
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Several functions including \fBSMIME_write_PKCS7()\fR, \fBi2d_PKCS7_bio_stream()\fR,
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\&\fBPEM_write_bio_PKCS7_stream()\fR finalize the structure. Alternatively finalization
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can be performed by obtaining the streaming \s-1ASN1\s0 \fB\s-1BIO\s0\fR directly using
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\&\fBBIO_new_PKCS7()\fR.
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.SH "RETURN VALUES"
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.IX Header "RETURN VALUES"
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\&\fBPKCS7_encrypt()\fR returns either a \s-1PKCS7\s0 structure or \s-1NULL\s0 if an error occurred.
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The error can be obtained from \fBERR_get_error\fR\|(3).
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.SH "SEE ALSO"
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.IX Header "SEE ALSO"
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\&\fBERR_get_error\fR\|(3), \fBPKCS7_decrypt\fR\|(3)
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.SH "HISTORY"
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.IX Header "HISTORY"
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The \fB\s-1PKCS7_STREAM\s0\fR flag was added in OpenSSL 1.0.0.
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.SH "COPYRIGHT"
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.IX Header "COPYRIGHT"
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Copyright 2002\-2016 The OpenSSL Project Authors. All Rights Reserved.
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.PP
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Licensed under the OpenSSL license (the \*(L"License\*(R"). You may not use
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this file except in compliance with the License. You can obtain a copy
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in the file \s-1LICENSE\s0 in the source distribution or at
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<https://www.openssl.org/source/license.html>.
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