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