man > EVP_MD-common(7)

EVP_MD-COMMON(7SSL)                            OpenSSL                           EVP_MD-COMMON(7SSL)

NAME
       EVP_MD-common - The OpenSSL EVP_MD implementations, common things

DESCRIPTION
       All the OpenSSL EVP_MD implementations understand the following OSSL_PARAM(3) entries that
       are gettable with EVP_MD_get_params(3), as well as these:

       "blocksize" (OSSL_DIGEST_PARAM_BLOCK_SIZE) <unsigned integer>
           The digest block size.  The length of the "blocksize" parameter should not exceed that of
           a size_t.

           This value can also be retrieved with EVP_MD_get_block_size(3).

       "size" (OSSL_DIGEST_PARAM_SIZE) <unsigned integer>
           The  digest  output size.  The length of the "size" parameter should not exceed that of a
           size_t.

           This value can also be retrieved with EVP_MD_get_size(3).

       "flags" (OSSL_DIGEST_PARAM_FLAGS) <unsigned integer>
           Diverse flags that describe exceptional  behaviour  for  the  digest.   These  flags  are
           described in "DESCRIPTION" in EVP_MD_meth_set_flags(3).

           The length of the "flags" parameter should equal that of an unsigned long int.

           This value can also be retrieved with EVP_MD_get_flags(3).

SEE ALSO
       EVP_MD_get_params(3), provider-digest(7)

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>.

3.0.13                                       2026-07-29                          EVP_MD-COMMON(7SSL)