192 lines
6.2 KiB
Groff
Executable File
192 lines
6.2 KiB
Groff
Executable File
.\" Automatically generated by Pod::Man 2.25 (Pod::Simple 3.16)
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.\" ========================================================================
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.\"
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.IX Title "SMIME_WRITE_PKCS7 3"
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.TH SMIME_WRITE_PKCS7 3 "2020-03-02" "3.0.0-dev" "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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SMIME_write_PKCS7 \- convert PKCS#7 structure to S/MIME format
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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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\& int SMIME_write_PKCS7(BIO *out, PKCS7 *p7, BIO *data, int flags);
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.Ve
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.SH "DESCRIPTION"
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.IX Header "DESCRIPTION"
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\&\fISMIME_write_PKCS7()\fR adds the appropriate \s-1MIME\s0 headers to a PKCS#7
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structure to produce an S/MIME message.
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.PP
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\&\fBout\fR is the \s-1BIO\s0 to write the data to. \fBp7\fR is the appropriate \fB\s-1PKCS7\s0\fR
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structure. If streaming is enabled then the content must be supplied in the
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\&\fBdata\fR argument. \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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The following flags can be passed in the \fBflags\fR parameter.
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.PP
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If \fB\s-1PKCS7_DETACHED\s0\fR is set then cleartext signing will be used,
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this option only makes sense for signedData where \fB\s-1PKCS7_DETACHED\s0\fR
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is also set when \fIPKCS7_sign()\fR is also called.
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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
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are added to the content, this only makes sense if \fB\s-1PKCS7_DETACHED\s0\fR
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is also set.
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.PP
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If the \fB\s-1PKCS7_STREAM\s0\fR flag is set streaming is performed. This flag should
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only be set if \fB\s-1PKCS7_STREAM\s0\fR was also set in the previous call to
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\&\fIPKCS7_sign()\fR or \fIPKCS7_encrypt()\fR.
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.PP
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If cleartext signing is being used and \fB\s-1PKCS7_STREAM\s0\fR not set then
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the data must be read twice: once to compute the signature in \fIPKCS7_sign()\fR
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and once to output the S/MIME message.
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.PP
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If streaming is performed the content is output in \s-1BER\s0 format using indefinite
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length constructed encoding except in the case of signed data with detached
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content where the content is absent and \s-1DER\s0 format is used.
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.SH "BUGS"
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.IX Header "BUGS"
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\&\fISMIME_write_PKCS7()\fR always base64 encodes PKCS#7 structures, there
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should be an option to disable this.
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.SH "RETURN VALUES"
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.IX Header "RETURN VALUES"
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\&\fISMIME_write_PKCS7()\fR returns 1 for success or 0 for failure.
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.SH "SEE ALSO"
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.IX Header "SEE ALSO"
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\&\fIERR_get_error\fR\|(3), \fIPKCS7_sign\fR\|(3),
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\&\fIPKCS7_verify\fR\|(3), \fIPKCS7_encrypt\fR\|(3)
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\&\fIPKCS7_decrypt\fR\|(3)
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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 Apache License 2.0 (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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