Updated: 2022/Sep/29

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



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>.



3.0.12                            2023-05-07                  EVP_MD-COMMON(7)