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Edit File : SMIME_read_PKCS7.3 \| Size : 6.33 KB
.\" Automatically generated by Pod::Man 4.11 (Pod::Simple 3.35) .\" .\" 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++. 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Always turn off hyphenation; it makes .\" way too many mistakes in technical documents. .if n .ad l .nh .SH "NAME" SMIME_read_PKCS7 \- parse S/MIME message .SH "SYNOPSIS" .IX Header "SYNOPSIS" .Vb 1 \& #include <openssl/pkcs7.h> \& \& PKCS7 SMIME_read_PKCS7(BIO in, BIO bcont); .Ve .SH "DESCRIPTION" .IX Header "DESCRIPTION" \&\fBSMIME_read_PKCS7()\fR parses a message in S/MIME format. .PP \&\fBin\fR is a \s-1BIO\s0 to read the message from. .PP If cleartext signing is used then the content is saved in a memory bio which is written to \fBbcont\fR, otherwise \&\fBbcont\fR is set to \fB\s-1NULL\s0\fR. .PP The parsed PKCS#7 structure is returned or \fB\s-1NULL\s0\fR if an error occurred. .SH "NOTES" .IX Header "NOTES" If \fBbcont\fR is not \fB\s-1NULL\s0\fR then the message is clear text signed. \fBbcont\fR can then be passed to \fBPKCS7_verify()\fR with the \fB\s-1PKCS7_DETACHED\s0\fR flag set. .PP Otherwise the type of the returned structure can be determined using \fBPKCS7_type_is_enveloped()\fR, etc. .PP To support future functionality if \fBbcont\fR is not \fB\s-1NULL\s0\fR \&\fBbcont\fR should be initialized to \fB\s-1NULL\s0\fR. For example: .PP .Vb 2 \& BIO cont = NULL; \& PKCS7 p7; \& \& p7 = SMIME_read_PKCS7(in, &cont); .Ve .SH "BUGS" .IX Header "BUGS" The \s-1MIME\s0 parser used by \fBSMIME_read_PKCS7()\fR is somewhat primitive. While it will handle most S/MIME messages more complex compound formats may not work. .PP The parser assumes that the \s-1PKCS7\s0 structure is always base64 encoded and will not handle the case where it is in binary format or uses quoted printable format. .PP The use of a memory \s-1BIO\s0 to hold the signed content limits the size of message which can be processed due to memory restraints: a streaming single pass option should be available. .SH "RETURN VALUES" .IX Header "RETURN VALUES" \&\fBSMIME_read_PKCS7()\fR returns a valid \fB\s-1PKCS7\s0\fR structure or \fB\s-1NULL\s0\fR if an error occurred. The error can be obtained from \fBERR_get_error\fR\\|(3). .SH "SEE ALSO" .IX Header "SEE ALSO" \&\fBERR_get_error\fR\\|(3), \&\fBSMIME_read_PKCS7\fR\\|(3), \fBPKCS7_sign\fR\\|(3), \&\fBPKCS7_verify\fR\\|(3), \fBPKCS7_encrypt\fR\\|(3) \&\fBPKCS7_decrypt\fR\\|(3) .SH "COPYRIGHT" .IX Header "COPYRIGHT" Copyright 2002\-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>. Back

Edit File : SMIME_read_PKCS7.3 | Size : 6.33 KB

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.\"
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.\" ========================================================================
.\"
.IX Title "SMIME_READ_PKCS7 3"
.TH SMIME_READ_PKCS7 3 "2023-09-11" "1.1.1w" "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"
SMIME_read_PKCS7 \- parse S/MIME message
.SH "SYNOPSIS"
.IX Header "SYNOPSIS"
.Vb 1
\& #include <openssl/pkcs7.h>
\&
\& PKCS7 *SMIME_read_PKCS7(BIO *in, BIO **bcont);
.Ve
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
\&\fBSMIME_read_PKCS7()\fR parses a message in S/MIME format.
.PP
\&\fBin\fR is a \s-1BIO\s0 to read the message from.
.PP
If cleartext signing is used then the content is saved in
a memory bio which is written to \fB*bcont\fR, otherwise
\&\fB*bcont\fR is set to \fB\s-1NULL\s0\fR.
.PP
The parsed PKCS#7 structure is returned or \fB\s-1NULL\s0\fR if an
error occurred.
.SH "NOTES"
.IX Header "NOTES"
If \fB*bcont\fR is not \fB\s-1NULL\s0\fR then the message is clear text
signed. \fB*bcont\fR can then be passed to \fBPKCS7_verify()\fR with
the \fB\s-1PKCS7_DETACHED\s0\fR flag set.
.PP
Otherwise the type of the returned structure can be determined
using \fBPKCS7_type_is_enveloped()\fR, etc.
.PP
To support future functionality if \fBbcont\fR is not \fB\s-1NULL\s0\fR
\&\fB*bcont\fR should be initialized to \fB\s-1NULL\s0\fR. For example:
.PP
.Vb 2
\& BIO *cont = NULL;
\& PKCS7 *p7;
\&
\& p7 = SMIME_read_PKCS7(in, &cont);
.Ve
.SH "BUGS"
.IX Header "BUGS"
The \s-1MIME\s0 parser used by \fBSMIME_read_PKCS7()\fR is somewhat primitive.
While it will handle most S/MIME messages more complex compound
formats may not work.
.PP
The parser assumes that the \s-1PKCS7\s0 structure is always base64
encoded and will not handle the case where it is in binary format
or uses quoted printable format.
.PP
The use of a memory \s-1BIO\s0 to hold the signed content limits the size
of message which can be processed due to memory restraints: a
streaming single pass option should be available.
.SH "RETURN VALUES"
.IX Header "RETURN VALUES"
\&\fBSMIME_read_PKCS7()\fR returns a valid \fB\s-1PKCS7\s0\fR structure or \fB\s-1NULL\s0\fR
if an error occurred. The error can be obtained from \fBERR_get_error\fR\|(3).
.SH "SEE ALSO"
.IX Header "SEE ALSO"
\&\fBERR_get_error\fR\|(3),
\&\fBSMIME_read_PKCS7\fR\|(3), \fBPKCS7_sign\fR\|(3),
\&\fBPKCS7_verify\fR\|(3), \fBPKCS7_encrypt\fR\|(3)
\&\fBPKCS7_decrypt\fR\|(3)
.SH "COPYRIGHT"
.IX Header "COPYRIGHT"
Copyright 2002\-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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