EVP_MD-MD5-SHA1 - The MD5-SHA1 EVP_MD implementation
Support for computing MD5-SHA1 digests through the EVP_MD API.
MD5-SHA1 is a rather special digest that's used with SSLv3.
This implementation is only available with the default provider, and is
  identified with the name "MD5-SHA1".
This implementation supports the common gettable parameters described in
  EVP_MD-common(7).
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().
EVP_MD_CTX_set_params(3), provider-digest(7),
  OSSL_PROVIDER-default(7)
Copyright 2020 The OpenSSL Project Authors. All Rights Reserved.Licensed under the Apache License 2.0 (the "License").
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    obtain a copy in the file LICENSE in the source distribution or at
    <https://www.openssl.org/source/license.html>.