mirror of
https://github.com/openssl/openssl.git
synced 2024-11-27 05:21:51 +08:00
b97fdb57a2
Reviewed-by: Rich Salz <rsalz@openssl.org> (Merged from https://github.com/openssl/openssl/pull/1900)
76 lines
2.0 KiB
Plaintext
76 lines
2.0 KiB
Plaintext
=pod
|
|
|
|
=head1 NAME
|
|
|
|
SMIME_read_CMS - parse S/MIME message
|
|
|
|
=head1 SYNOPSIS
|
|
|
|
#include <openssl/cms.h>
|
|
|
|
CMS_ContentInfo *SMIME_read_CMS(BIO *in, BIO **bcont);
|
|
|
|
=head1 DESCRIPTION
|
|
|
|
SMIME_read_CMS() parses a message in S/MIME format.
|
|
|
|
B<in> is a BIO to read the message from.
|
|
|
|
If cleartext signing is used then the content is saved in a memory bio which is
|
|
written to B<*bcont>, otherwise B<*bcont> is set to NULL.
|
|
|
|
The parsed CMS_ContentInfo structure is returned or NULL if an
|
|
error occurred.
|
|
|
|
=head1 NOTES
|
|
|
|
If B<*bcont> is not NULL then the message is clear text signed. B<*bcont> can
|
|
then be passed to CMS_verify() with the B<CMS_DETACHED> flag set.
|
|
|
|
Otherwise the type of the returned structure can be determined
|
|
using CMS_get0_type().
|
|
|
|
To support future functionality if B<bcont> is not NULL B<*bcont> should be
|
|
initialized to NULL. For example:
|
|
|
|
BIO *cont = NULL;
|
|
CMS_ContentInfo *cms;
|
|
|
|
cms = SMIME_read_CMS(in, &cont);
|
|
|
|
=head1 BUGS
|
|
|
|
The MIME parser used by SMIME_read_CMS() is somewhat primitive. While it will
|
|
handle most S/MIME messages more complex compound formats may not work.
|
|
|
|
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.
|
|
|
|
The use of a memory BIO 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.
|
|
|
|
=head1 RETURN VALUES
|
|
|
|
SMIME_read_CMS() returns a valid B<CMS_ContentInfo> structure or B<NULL>
|
|
if an error occurred. The error can be obtained from ERR_get_error(3).
|
|
|
|
=head1 SEE ALSO
|
|
|
|
L<ERR_get_error(3)>, L<CMS_type(3)>,
|
|
L<SMIME_read_CMS(3)>, L<CMS_sign(3)>,
|
|
L<CMS_verify(3)>, L<CMS_encrypt(3)>,
|
|
L<CMS_decrypt(3)>
|
|
|
|
=head1 COPYRIGHT
|
|
|
|
Copyright 2008-2016 The OpenSSL Project Authors. All Rights Reserved.
|
|
|
|
Licensed under the OpenSSL license (the "License"). You may not use
|
|
this file except in compliance with the License. You can obtain a copy
|
|
in the file LICENSE in the source distribution or at
|
|
L<https://www.openssl.org/source/license.html>.
|
|
|
|
=cut
|