1=pod 2 3=head1 NAME 4 5SMIME_write_PKCS7 - convert PKCS#7 structure to S/MIME format. 6 7=head1 SYNOPSIS 8 9int SMIME_write_PKCS7(BIO *out, PKCS7 *p7, BIO *data, int flags); 10 11=head1 DESCRIPTION 12 13SMIME_write_PKCS7() adds the appropriate MIME headers to a PKCS#7 14structure to produce an S/MIME message. 15 16B<out> is the BIO to write the data to. B<p7> is the appropriate 17B<PKCS7> structure. If cleartext signing (B<multipart/signed>) is 18being used then the signed data must be supplied in the B<data> 19argument. B<flags> is an optional set of flags. 20 21=head1 NOTES 22 23The following flags can be passed in the B<flags> parameter. 24 25If B<PKCS7_DETACHED> is set then cleartext signing will be used, 26this option only makes sense for signedData where B<PKCS7_DETACHED> 27is also set when PKCS7_sign() is also called. 28 29If the B<PKCS7_TEXT> flag is set MIME headers for type B<text/plain> 30are added to the content, this only makes sense if B<PKCS7_DETACHED> 31is also set. 32 33If cleartext signing is being used then the data must be read twice: 34once to compute the signature in PKCS7_sign() and once to output the 35S/MIME message. 36 37=head1 BUGS 38 39SMIME_write_PKCS7() always base64 encodes PKCS#7 structures, there 40should be an option to disable this. 41 42There should really be a way to produce cleartext signing using only 43a single pass of the data. 44 45=head1 RETURN VALUES 46 47SMIME_write_PKCS7() returns 1 for success or 0 for failure. 48 49=head1 SEE ALSO 50 51L<ERR_get_error(3)|ERR_get_error(3)>, L<PKCS7_sign(3)|PKCS7_sign(3)>, 52L<PKCS7_verify(3)|PKCS7_verify(3)>, L<PKCS7_encrypt(3)|PKCS7_encrypt(3)> 53L<PKCS7_decrypt(3)|PKCS7_decrypt(3)> 54 55=head1 HISTORY 56 57SMIME_write_PKCS7() was added to OpenSSL 0.9.5 58 59=cut 60