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.IX Title "EVP_MD-COMMON 7ssl"
.TH EVP_MD-COMMON 7ssl 2024-04-28 3.3.0 OpenSSL
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.SH NAME
EVP_MD\-common \- The OpenSSL EVP_MD implementations, common things
.SH DESCRIPTION
.IX Header "DESCRIPTION"
All the OpenSSL EVP_MD implementations understand the following
\&\fBOSSL_PARAM\fR\|(3) entries that are
gettable with \fBEVP_MD_get_params\fR\|(3), as well as these:
.IP """blocksize"" (\fBOSSL_DIGEST_PARAM_BLOCK_SIZE\fR) <unsigned integer>" 4
.IX Item """blocksize"" (OSSL_DIGEST_PARAM_BLOCK_SIZE) <unsigned integer>"
The digest block size.
The length of the "blocksize" parameter should not exceed that of a
\&\fBsize_t\fR.
.Sp
This value can also be retrieved with \fBEVP_MD_get_block_size\fR\|(3).
.IP """size"" (\fBOSSL_DIGEST_PARAM_SIZE\fR) <unsigned integer>" 4
.IX Item """size"" (OSSL_DIGEST_PARAM_SIZE) <unsigned integer>"
The digest output size.
The length of the "size" parameter should not exceed that of a \fBsize_t\fR.
.Sp
This value can also be retrieved with \fBEVP_MD_get_size\fR\|(3).
.IP """flags"" (\fBOSSL_DIGEST_PARAM_FLAGS\fR) <unsigned integer>" 4
.IX Item """flags"" (OSSL_DIGEST_PARAM_FLAGS) <unsigned integer>"
Diverse flags that describe exceptional behaviour for the digest.
These flags are described in "DESCRIPTION" in \fBEVP_MD_meth_set_flags\fR\|(3).
.Sp
The length of the "flags" parameter should equal that of an
\&\fBunsigned long int\fR.
.Sp
This value can also be retrieved with \fBEVP_MD_get_flags\fR\|(3).
.SH "SEE ALSO"
.IX Header "SEE ALSO"
\&\fBEVP_MD_get_params\fR\|(3), \fBprovider\-digest\fR\|(7)
.SH COPYRIGHT
.IX Header "COPYRIGHT"
Copyright 2020\-2021 The OpenSSL Project Authors. All Rights Reserved.
.PP
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>.