EVP_MD-COMMON(7ossl) OpenSSL EVP_MD-COMMON(7ossl)
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).
FIPS indicator
Digest implementations in the OpenSSL FIPS provider make the following
parameter available with EVP_MD_CTX_get_params(3):
"fips-indicator" (OSSL_DIGEST_PARAM_FIPS_APPROVED_INDICATOR) <integer>
Returns 1 if the operation is FIPS approved, or 0 otherwise. See
"FIPS indicators" in fips_module(7) for more information.
SEE ALSO
"PARAMETERS" in EVP_DigestInit(3), EVP_MD_get_params(3),
provider-digest(7)
COPYRIGHT
Copyright 2020-2026 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>.
3.6.5 2026-09-29 EVP_MD-COMMON(7ossl)
openssl 3.6.5 - Generated Sat Oct 3 09:47:24 CDT 2026