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SMIME_WRITE_PKCS7(3)		    OpenSSL		  SMIME_WRITE_PKCS7(3)

NAME
       SMIME_write_PKCS7 - convert PKCS#7 structure to S/MIME format

SYNOPSIS
	#include <openssl/pkcs7.h>

	int SMIME_write_PKCS7(BIO *out,	PKCS7 *p7, BIO *data, int flags);

DESCRIPTION
       SMIME_write_PKCS7() adds	the appropriate	MIME headers to	a PKCS#7
       structure to produce an S/MIME message.

       out is the BIO to write the data	to. p7 is the appropriate PKCS7
       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 PKCS7_DETACHED is set	then cleartext signing will be used, this
       option only makes sense for signedData where PKCS7_DETACHED is also set
       when PKCS7_sign() is also called.

       If the PKCS7_TEXT flag is set MIME headers for type text/plain are
       added to	the content, this only makes sense if PKCS7_DETACHED is	also
       set.

       If the PKCS7_STREAM flag	is set streaming is performed. This flag
       should only be set if PKCS7_STREAM was also set in the previous call to
       PKCS7_sign() or PKCS7_encrypt().

       If cleartext signing is being used and PKCS7_STREAM not set then	the
       data must be read twice:	once to	compute	the signature in PKCS7_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_PKCS7() always base64 encodes PKCS#7	structures, there
       should be an option to disable this.

RETURN VALUES
       SMIME_write_PKCS7() returns 1 for success or 0 for failure.

SEE ALSO
       ERR_get_error(3), PKCS7_sign(3),	PKCS7_verify(3), PKCS7_encrypt(3)
       PKCS7_decrypt(3)

COPYRIGHT
       Copyright 2002-2016 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_PKCS7(3)

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

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