15 #include <openssl/evp.h>
17 const EVP_MD *EVP_sha224(void);
18 const EVP_MD *EVP_sha256(void);
19 const EVP_MD *EVP_sha512_224(void);
20 const EVP_MD *EVP_sha512_256(void);
21 const EVP_MD *EVP_sha384(void);
22 const EVP_MD *EVP_sha512(void);
26 SHA-2 (Secure Hash Algorithm 2) is a family of cryptographic hash functions
27 standardized in NIST FIPS 180-4, first published in 2001.
38 The SHA-2 SHA-224, SHA-256, SHA-512/224, SHA512/256, SHA-384 and SHA-512
39 algorithms, which generate 224, 256, 224, 256, 384 and 512 bits
40 respectively of output from a given input.
42 The two algorithms: SHA-512/224 and SHA512/256 are truncated forms of the
43 SHA-512 algorithm. They are distinct from SHA-224 and SHA-256 even though
44 their outputs are of the same size.
51 These functions return a B<EVP_MD> structure that contains the
52 implementation of the symmetric cipher. See L<EVP_MD_meth_new(3)> for
53 details of the B<EVP_MD> structure.
66 Copyright 2017-2018 The OpenSSL Project Authors. All Rights Reserved.
68 Licensed under the Apache License 2.0 (the "License"). You may not use
69 this file except in compliance with the License. You can obtain a copy
70 in the file LICENSE in the source distribution or at
71 L<https://www.openssl.org/source/license.html>.