5 CMS_final, CMS_final_digest - finalise a CMS_ContentInfo structure
9 #include <openssl/cms.h>
11 int CMS_final(CMS_ContentInfo *cms, BIO *data, BIO *dcont, unsigned int flags);
12 int CMS_final_digest(CMS_ContentInfo *cms, const unsigned char *md,
13 unsigned int mdlen, BIO *dcont, unsigned int flags);
17 CMS_final() finalises the structure B<cms>. Its purpose is to perform any
18 operations necessary on B<cms> (digest computation for example) and set the
19 appropriate fields. The parameter B<data> contains the content to be
20 processed. The B<dcont> parameter contains a BIO to write content to after
21 processing: this is only used with detached data and will usually be set to
24 CMS_final_digest() finalises the structure B<cms> using a pre-computed digest,
25 rather than computing the digest from the original data.
29 These functions will normally be called when the B<CMS_PARTIAL> flag is used. It
30 should only be used when streaming is not performed because the streaming
31 I/O functions perform finalisation operations internally.
33 To sign a pre-computed digest, L<CMS_sign(3)> or CMS_sign_ex() is called
34 with the B<data> parameter set to NULL before the CMS structure is finalised
35 with the digest provided to CMS_final_digest() in binary form.
36 When signing a pre-computed digest, the security relies on the digest and its
37 computation from the original message being trusted.
41 CMS_final() and CMS_final_digest() return 1 for success or 0 for failure.
45 L<ERR_get_error(3)>, L<CMS_sign(3)>,
50 CMS_final_digest() was added in OpenSSL 3.2.
54 Copyright 2008-2022 The OpenSSL Project Authors. All Rights Reserved.
56 Licensed under the Apache License 2.0 (the "License"). You may not use
57 this file except in compliance with the License. You can obtain a copy
58 in the file LICENSE in the source distribution or at
59 L<https://www.openssl.org/source/license.html>.