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 the B<PKCS7_PARTSIGN> flag is set the signed data is finalized
34and output along with the content. This flag should only be set
35if B<PKCS7_DETACHED> is also set and the previous call to PKCS7_sign()
36also set these flags.
37
38If cleartext signing is being used and B<PKCS7_PARTSIGN> 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
42=head1 BUGS
43
44SMIME_write_PKCS7() always base64 encodes PKCS#7 structures, there
45should be an option to disable this.
46
47=head1 RETURN VALUES
48
49SMIME_write_PKCS7() returns 1 for success or 0 for failure.
50
51=head1 SEE ALSO
52
53L<ERR_get_error(3)|ERR_get_error(3)>, L<PKCS7_sign(3)|PKCS7_sign(3)>,
54L<PKCS7_verify(3)|PKCS7_verify(3)>, L<PKCS7_encrypt(3)|PKCS7_encrypt(3)>
55L<PKCS7_decrypt(3)|PKCS7_decrypt(3)>
56
57=head1 HISTORY
58
59SMIME_write_PKCS7() was added to OpenSSL 0.9.5
60
61=cut
62