Imported OpenSSL 1.1.1a

doc/man3/EVP_sha224.pod

@@ -0,0 +1,74 @@
+=pod
+
+=head1 NAME
+
+EVP_sha224,
+EVP_sha256,
+EVP_sha512_224,
+EVP_sha512_256,
+EVP_sha384,
+EVP_sha512
+- SHA-2 For EVP
+
+=head1 SYNOPSIS
+
+ #include <openssl/evp.h>
+
+ const EVP_MD *EVP_sha224(void);
+ const EVP_MD *EVP_sha256(void);
+ const EVP_MD *EVP_sha512_224(void);
+ const EVP_MD *EVP_sha512_256(void);
+ const EVP_MD *EVP_sha384(void);
+ const EVP_MD *EVP_sha512(void);
+
+=head1 DESCRIPTION
+
+SHA-2 (Secure Hash Algorithm 2) is a family of cryptographic hash functions
+standardized in NIST FIPS 180-4, first published in 2001.
+
+=over 4
+
+=item EVP_sha224(),
+EVP_sha256(),
+EVP_sha512_224,
+EVP_sha512_256,
+EVP_sha384(),
+EVP_sha512()
+
+The SHA-2 SHA-224, SHA-256, SHA-512/224, SHA512/256, SHA-384 and SHA-512
+algorithms, which generate 224, 256, 224, 256, 384 and 512 bits
+respectively of output from a given input.
+
+The two algorithms: SHA-512/224 and SHA512/256 are truncated forms of the
+SHA-512 algorithm. They are distinct from SHA-224 and SHA-256 even though
+their outputs are of the same size.
+
+=back
+
+
+=head1 RETURN VALUES
+
+These functions return a B<EVP_MD> structure that contains the
+implementation of the symmetric cipher. See L<EVP_MD_meth_new(3)> for
+details of the B<EVP_MD> structure.
+
+=head1 CONFORMING TO
+
+NIST FIPS 180-4.
+
+=head1 SEE ALSO
+
+L<evp(7)>,
+L<EVP_DigestInit(3)>
+
+=head1 COPYRIGHT
+
+Copyright 2017-2018 The OpenSSL Project Authors. All Rights Reserved.
+
+Licensed under the OpenSSL license (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
+L<https://www.openssl.org/source/license.html>.
+
+=cut
+