1=pod 2 3=head1 NAME 4 5SMIME_write_PKCS7 - convert PKCS#7 structure to S/MIME format 6 7=head1 SYNOPSIS 8 9 #include <openssl/pkcs7.h> 10 11 int SMIME_write_PKCS7(BIO *out, PKCS7 *p7, BIO *data, int flags); 12 13=head1 DESCRIPTION 14 15SMIME_write_PKCS7() adds the appropriate MIME headers to a PKCS#7 16structure to produce an S/MIME message. 17 18B<out> is the BIO to write the data to. B<p7> is the appropriate B<PKCS7> 19structure. If streaming is enabled then the content must be supplied in the 20B<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<PKCS7_DETACHED> is set then cleartext signing will be used, 27this option only makes sense for signedData where B<PKCS7_DETACHED> 28is also set when PKCS7_sign() is also called. 29 30If the B<PKCS7_TEXT> flag is set MIME headers for type B<text/plain> 31are added to the content, this only makes sense if B<PKCS7_DETACHED> 32is also set. 33 34If the B<PKCS7_STREAM> flag is set streaming is performed. This flag should 35only be set if B<PKCS7_STREAM> was also set in the previous call to 36PKCS7_sign() or PKCS7_encrypt(). 37 38If cleartext signing is being used and B<PKCS7_STREAM> not set then 39the data must be read twice: once to compute the signature in PKCS7_sign() 40and once to output the S/MIME message. 41 42If streaming is performed the content is output in BER format using indefinite 43length constructed encoding except in the case of signed data with detached 44content where the content is absent and DER format is used. 45 46=head1 BUGS 47 48SMIME_write_PKCS7() always base64 encodes PKCS#7 structures, there 49should be an option to disable this. 50 51=head1 RETURN VALUES 52 53SMIME_write_PKCS7() returns 1 for success or 0 for failure. 54 55=head1 SEE ALSO 56 57L<ERR_get_error(3)>, L<PKCS7_sign(3)>, 58L<PKCS7_verify(3)>, L<PKCS7_encrypt(3)> 59L<PKCS7_decrypt(3)> 60 61=head1 COPYRIGHT 62 63Copyright 2002-2016 The OpenSSL Project Authors. All Rights Reserved. 64 65Licensed under the OpenSSL license (the "License"). You may not use 66this file except in compliance with the License. You can obtain a copy 67in the file LICENSE in the source distribution or at 68L<https://www.openssl.org/source/license.html>. 69 70=cut 71