NAME

       CMS_digest_create_ex, CMS_digest_create - Create CMS DigestedData object

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);

DESCRIPTION

       CMS_digest_create_ex() creates a CMS_ContentInfo structure with a type NID_pkcs7_digest.
       The data supplied via the in BIO is digested using md. The library context libctx and the
       property query propq are used when retrieving algorithms from providers.  The flags field
       supports the CMS_DETACHED and CMS_STREAM flags, Internally CMS_final() is called unless
       CMS_STREAM is specified.

       The CMS_ContentInfo structure can be freed using CMS_ContentInfo_free(3).

       CMS_digest_create() is similar to CMS_digest_create_ex() but uses default values of NULL
       for the library context libctx and the property query propq.

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 ERR_get_error(3).  Otherwise they return a
       pointer to the newly allocated structure.

SEE ALSO

       ERR_get_error(3), CMS_final(3)>

HISTORY

       The CMS_digest_create_ex() method was added in OpenSSL 3.0.

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 <https://www.openssl.org/source/license.html>.