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>.