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Edit File : SMIME_read_PKCS7.3ssl \| Size : 6.06 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()\fR. .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), \fBPKCS7_type\fR\\|(3) \&\fBSMIME_read_PKCS7\fR\\|(3), \fBPKCS7_sign\fR\\|(3), \&\fBPKCS7_verify\fR\\|(3), \fBPKCS7_encrypt\fR\\|(3) \&\fBPKCS7_decrypt\fR\\|(3) .SH "HISTORY" .IX Header "HISTORY" \&\fBSMIME_read_PKCS7()\fR was added to OpenSSL 0.9.5 Back

Edit File : SMIME_read_PKCS7.3ssl | Size : 6.06 KB

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.\" give a nicer C++.  Capital omega is used to do unbreakable dashes and
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.\"
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.rm #[ #] #H #V #F C
.\" ========================================================================
.\"
.IX Title "SMIME_read_PKCS7 3"
.TH SMIME_read_PKCS7 3 "2019-12-20" "1.0.2u" "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()\fR.
.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), \fBPKCS7_type\fR\|(3)
\&\fBSMIME_read_PKCS7\fR\|(3), \fBPKCS7_sign\fR\|(3),
\&\fBPKCS7_verify\fR\|(3), \fBPKCS7_encrypt\fR\|(3)
\&\fBPKCS7_decrypt\fR\|(3)
.SH "HISTORY"
.IX Header "HISTORY"
\&\fBSMIME_read_PKCS7()\fR was added to OpenSSL 0.9.5

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