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//proc/self/root/opt/cpanel/ea-openssl11/share/man/man3/SMIME_read_CMS.3
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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_CMS \- parse S/MIME message .SH "SYNOPSIS" .IX Header "SYNOPSIS" .Vb 1 \& #include <openssl/cms.h> \& \& CMS_ContentInfo *SMIME_read_CMS(BIO *in, BIO **bcont); .Ve .SH "DESCRIPTION" .IX Header "DESCRIPTION" \&\fISMIME_read_CMS()\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 \s-1NULL.\s0 .PP The parsed CMS_ContentInfo structure is returned or \s-1NULL\s0 if an error occurred. .SH "NOTES" .IX Header "NOTES" If \fB*bcont\fR is not \s-1NULL\s0 then the message is clear text signed. \fB*bcont\fR can then be passed to \fICMS_verify()\fR with the \fB\s-1CMS_DETACHED\s0\fR flag set. .PP Otherwise the type of the returned structure can be determined using \fICMS_get0_type()\fR. .PP To support future functionality if \fBbcont\fR is not \s-1NULL \s0\fB*bcont\fR should be initialized to \s-1NULL.\s0 For example: .PP .Vb 2 \& BIO *cont = NULL; \& CMS_ContentInfo *cms; \& \& cms = SMIME_read_CMS(in, &cont); .Ve .SH "BUGS" .IX Header "BUGS" The \s-1MIME\s0 parser used by \fISMIME_read_CMS()\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 CMS_ContentInfo 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" \&\fISMIME_read_CMS()\fR returns a valid \fBCMS_ContentInfo\fR structure or \fB\s-1NULL\s0\fR if an error occurred. The error can be obtained from \fIERR_get_error\fR\|(3). .SH "SEE ALSO" .IX Header "SEE ALSO" \&\fIERR_get_error\fR\|(3), \fICMS_type\fR\|(3), \&\fISMIME_read_CMS\fR\|(3), \fICMS_sign\fR\|(3), \&\fICMS_verify\fR\|(3), \fICMS_encrypt\fR\|(3), \&\fICMS_decrypt\fR\|(3) .SH "COPYRIGHT" .IX Header "COPYRIGHT" Copyright 2008\-2016 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>.