1=pod 2 3=head1 NAME 4 5SMIME_write_CMS - convert CMS structure to S/MIME format 6 7=head1 SYNOPSIS 8 9 #include <openssl/cms.h> 10 11 int SMIME_write_CMS(BIO *out, CMS_ContentInfo *cms, BIO *data, int flags); 12 13=head1 DESCRIPTION 14 15SMIME_write_CMS() adds the appropriate MIME headers to a CMS 16structure to produce an S/MIME message. 17 18B<out> is the BIO to write the data to. B<cms> is the appropriate 19B<CMS_ContentInfo> structure. If streaming is enabled then the content must be 20supplied in the B<data> argument. B<flags> is an optional set of flags. 21 22=head1 NOTES 23 24The following flags can be passed in the B<flags> parameter. 25 26If B<CMS_DETACHED> is set then cleartext signing will be used, this option only 27makes sense for SignedData where B<CMS_DETACHED> is also set when CMS_sign() is 28called. 29 30If the B<CMS_TEXT> flag is set MIME headers for type B<text/plain> are added to 31the content, this only makes sense if B<CMS_DETACHED> is also set. 32 33If the B<CMS_STREAM> flag is set streaming is performed. This flag should only 34be set if B<CMS_STREAM> was also set in the previous call to a CMS_ContentInfo 35creation function. 36 37If cleartext signing is being used and B<CMS_STREAM> not set then the data must 38be read twice: once to compute the signature in CMS_sign() and once to output 39the S/MIME message. 40 41If streaming is performed the content is output in BER format using indefinite 42length constructed encoding except in the case of signed data with detached 43content where the content is absent and DER format is used. 44 45=head1 BUGS 46 47SMIME_write_CMS() always base64 encodes CMS structures, there should be an 48option to disable this. 49 50=head1 RETURN VALUES 51 52SMIME_write_CMS() returns 1 for success or 0 for failure. 53 54=head1 SEE ALSO 55 56L<ERR_get_error(3)>, L<CMS_sign(3)>, 57L<CMS_verify(3)>, L<CMS_encrypt(3)> 58L<CMS_decrypt(3)> 59 60=head1 COPYRIGHT 61 62Copyright 2008-2016 The OpenSSL Project Authors. All Rights Reserved. 63 64Licensed under the OpenSSL license (the "License"). You may not use 65this file except in compliance with the License. You can obtain a copy 66in the file LICENSE in the source distribution or at 67L<https://www.openssl.org/source/license.html>. 68 69=cut 70