EVP_MD-SHA1 - The SHA1 EVP_MD implementation
Support for computing SHA1 digests through the EVP_MD API.
This implementation is available with the FIPS provider as well as the default
provider, and is identified with the names "SHA1" and
This implementation supports the common gettable parameters described in
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
- 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().
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