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1 | =pod |
2 | ||
3 | =head1 NAME | |
4 | ||
bb9ad09e | 5 | SMIME_write_CMS - convert CMS structure to S/MIME format |
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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 | ||
15 | SMIME_write_CMS() adds the appropriate MIME headers to a CMS | |
16 | structure to produce an S/MIME message. | |
17 | ||
18 | B<out> is the BIO to write the data to. B<cms> is the appropriate | |
19 | B<CMS_ContentInfo> structure. If streaming is enabled then the content must be | |
20 | supplied in the B<data> argument. B<flags> is an optional set of flags. | |
21 | ||
22 | =head1 NOTES | |
23 | ||
24 | The following flags can be passed in the B<flags> parameter. | |
25 | ||
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26 | If B<CMS_DETACHED> is set then cleartext signing will be used, this option only |
27 | makes sense for SignedData where B<CMS_DETACHED> is also set when CMS_sign() is | |
28 | called. | |
e33ffaca | 29 | |
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30 | If the B<CMS_TEXT> flag is set MIME headers for type B<text/plain> are added to |
31 | the content, this only makes sense if B<CMS_DETACHED> is also set. | |
e33ffaca | 32 | |
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33 | If the B<CMS_STREAM> flag is set streaming is performed. This flag should only |
34 | be set if B<CMS_STREAM> was also set in the previous call to a CMS_ContentInfo | |
35 | creation function. | |
e33ffaca | 36 | |
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37 | If cleartext signing is being used and B<CMS_STREAM> not set then the data must |
38 | be read twice: once to compute the signature in CMS_sign() and once to output | |
39 | the S/MIME message. | |
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40 | |
41 | If streaming is performed the content is output in BER format using indefinite | |
c420fab5 | 42 | length constructed encoding except in the case of signed data with detached |
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43 | content where the content is absent and DER format is used. |
44 | ||
45 | =head1 BUGS | |
46 | ||
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47 | SMIME_write_CMS() always base64 encodes CMS structures, there should be an |
48 | option to disable this. | |
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49 | |
50 | =head1 RETURN VALUES | |
51 | ||
52 | SMIME_write_CMS() returns 1 for success or 0 for failure. | |
53 | ||
54 | =head1 SEE ALSO | |
55 | ||
9b86974e RS |
56 | L<ERR_get_error(3)>, L<CMS_sign(3)>, |
57 | L<CMS_verify(3)>, L<CMS_encrypt(3)> | |
58 | L<CMS_decrypt(3)> | |
e33ffaca | 59 | |
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60 | =head1 COPYRIGHT |
61 | ||
62 | Copyright 2008-2016 The OpenSSL Project Authors. All Rights Reserved. | |
63 | ||
4746f25a | 64 | Licensed under the Apache License 2.0 (the "License"). You may not use |
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65 | this file except in compliance with the License. You can obtain a copy |
66 | in the file LICENSE in the source distribution or at | |
67 | L<https://www.openssl.org/source/license.html>. | |
68 | ||
69 | =cut |