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SMIME_WRITE_CMS(3)		    OpenSSL		    SMIME_WRITE_CMS(3)

NAME
       SMIME_write_CMS - convert CMS structure to S/MIME format

SYNOPSIS
	#include <openssl/cms.h>

	int SMIME_write_CMS(BIO	*out, CMS_ContentInfo *cms, BIO	*data, int flags);

DESCRIPTION
       SMIME_write_CMS() adds the appropriate MIME headers to a	CMS structure
       to produce an S/MIME message.

       out is the BIO to write the data	to. cms	is the appropriate
       CMS_ContentInfo structure. If streaming is enabled then the content
       must be supplied	in the data argument. flags is an optional set of
       flags.

NOTES
       The following flags can be passed in the	flags parameter.

       If CMS_DETACHED is set then cleartext signing will be used, this	option
       only makes sense	for SignedData where CMS_DETACHED is also set when
       CMS_sign() is called.

       If the CMS_TEXT flag is set MIME	headers	for type text/plain are	added
       to the content, this only makes sense if	CMS_DETACHED is	also set.

       If the CMS_STREAM flag is set streaming is performed. This flag should
       only be set if CMS_STREAM was also set in the previous call to a
       CMS_ContentInfo creation	function.

       If cleartext signing is being used and CMS_STREAM not set then the data
       must be read twice: once	to compute the signature in CMS_sign() and
       once to output the S/MIME message.

       If streaming is performed the content is	output in BER format using
       indefinite length constructed encoding except in	the case of signed
       data with detached content where	the content is absent and DER format
       is used.

BUGS
       SMIME_write_CMS() always	base64 encodes CMS structures, there should be
       an option to disable this.

RETURN VALUES
       SMIME_write_CMS() returns 1 for success or 0 for	failure.

SEE ALSO
       ERR_get_error(3), CMS_sign(3), CMS_verify(3), CMS_encrypt(3)
       CMS_decrypt(3)

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
       <https://www.openssl.org/source/license.html>.

1.1.1a				  2018-11-20		    SMIME_WRITE_CMS(3)

NAME | SYNOPSIS | DESCRIPTION | NOTES | BUGS | RETURN VALUES | SEE ALSO | COPYRIGHT

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