| =pod |
| |
| =head1 NAME |
| |
| CMS_digest_create_ex, CMS_digest_create |
| - Create CMS DigestedData object |
| |
| =head1 SYNOPSIS |
| |
| #include <openssl/cms.h> |
| |
| CMS_ContentInfo *CMS_digest_create_ex(BIO *in, const EVP_MD *md, |
| unsigned int flags, OSSL_LIB_CTX *ctx, |
| const char *propq); |
| |
| CMS_ContentInfo *CMS_digest_create(BIO *in, const EVP_MD *md, |
| unsigned int flags); |
| |
| =head1 DESCRIPTION |
| |
| CMS_digest_create_ex() creates a B<CMS_ContentInfo> structure |
| with a type B<NID_pkcs7_digest>. The data supplied via the I<in> BIO is digested |
| using I<md>. The library context I<libctx> and the property query I<propq> are |
| used when retrieving algorithms from providers. |
| The I<flags> field supports the B<CMS_DETACHED> and B<CMS_STREAM> flags, |
| Internally CMS_final() is called unless B<CMS_STREAM> is specified. |
| |
| The B<CMS_ContentInfo> structure can be freed using L<CMS_ContentInfo_free(3)>. |
| |
| CMS_digest_create() is similar to CMS_digest_create_ex() |
| but uses default values of NULL for the library context I<libctx> and the |
| property query I<propq>. |
| |
| |
| =head1 RETURN VALUES |
| |
| If the allocation fails, CMS_digest_create_ex() and CMS_digest_create() |
| return NULL and set an error code that can be obtained by L<ERR_get_error(3)>. |
| Otherwise they return a pointer to the newly allocated structure. |
| |
| =head1 SEE ALSO |
| |
| L<ERR_get_error(3)>, L<CMS_final(3)>> |
| |
| =head1 HISTORY |
| |
| The CMS_digest_create_ex() method was added in OpenSSL 3.0. |
| |
| =head1 COPYRIGHT |
| |
| Copyright 2020-2021 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 |
| L<https://www.openssl.org/source/license.html>. |
| |
| =cut |
