EVP_MD-SHA1(7SSL) OpenSSL EVP_MD-SHA1(7SSL)
NAME
EVP_MD-SHA1 - The SHA1 EVP_MD implementation
DESCRIPTION
Support for computing SHA1 digests through the EVP_MD API.
Identities
This implementation is available with the FIPS provider as well as the
default provider, and is identified with the names "SHA1" and "SHA-1".
Gettable Parameters
This implementation supports the common gettable parameters described in
EVP_MD-common(7).
Settable Context Parameters
This implementation supports the following OSSL_PARAM(3) entries,
settable for an EVP_MD_CTX with EVP_MD_CTX_set_params(3):
"ssl3-ms" (OSSL_DIGEST_PARAM_SSL3_MS) <octet string>
This parameter is set by libssl in order to calculate a signature
hash for an SSLv3 CertificateVerify message as per RFC6101. It is
only set after all handshake messages have already been digested via
OP_digest_update() calls. The parameter provides the master secret
value to be added to the digest. The digest implementation should
calculate the complete digest as per RFC6101 section 5.6.8. The
next call after setting this parameter should be OP_digest_final().
SEE ALSO
EVP_MD_CTX_set_params(3), provider-digest(7), OSSL_PROVIDER-FIPS(7),
OSSL_PROVIDER-default(7)
COPYRIGHT
Copyright 2020 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>.
3.5.4 2025-09-30 EVP_MD-SHA1(7SSL)
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