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This is defined in NIST SP 800-208 as the truncation to 192 bits of SHA256. Unlike other truncated hashes in the SHA2 suite, this variant doesn't have a different initial state, it is just a pure truncation of the output. Reviewed-by: Tomas Mraz <tomas@openssl.org> Reviewed-by: Paul Dale <pauli@openssl.org> (Merged from https://github.com/openssl/openssl/pull/21180)
82 lines
1.4 KiB
Plaintext
82 lines
1.4 KiB
Plaintext
=pod
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=head1 NAME
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EVP_MD-SHA2 - The SHA2 EVP_MD implementation
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=head1 DESCRIPTION
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Support for computing SHA2 digests through the B<EVP_MD> API.
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=head2 Identities
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This implementation includes the following varieties:
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=over 4
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=item *
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Available with the FIPS provider as well as the default provider:
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=over 4
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=item SHA2-224
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Known names are "SHA2-224", "SHA-224" and "SHA224".
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=item SHA2-256
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Known names are "SHA2-256", "SHA-256" and "SHA256".
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=item SHA2-384
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Known names are "SHA2-384", "SHA-384" and "SHA384".
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=item SHA2-512
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Known names are "SHA2-512", "SHA-512" and "SHA512".
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=back
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=item *
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Available with the default provider:
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=over 4
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=item SHA2-256/192
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Known names are "SHA2-256/192", "SHA-256/192" and "SHA256-192".
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=item SHA2-512/224
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Known names are "SHA2-512/224", "SHA-512/224" and "SHA512-224".
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=item SHA2-512/256
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Known names are "SHA2-512/256", "SHA-512/256" and "SHA512-256".
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=back
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=back
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=head2 Gettable Parameters
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This implementation supports the common gettable parameters described
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in L<EVP_MD-common(7)>.
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=head1 SEE ALSO
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L<provider-digest(7)>, L<OSSL_PROVIDER-FIPS(7)>, L<OSSL_PROVIDER-default(7)>
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=head1 COPYRIGHT
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Copyright 2020 The OpenSSL Project Authors. All Rights Reserved.
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Licensed under the Apache License 2.0 (the "License"). You may not use
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this file except in compliance with the License. You can obtain a copy
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in the file LICENSE in the source distribution or at
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L<https://www.openssl.org/source/license.html>.
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=cut
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