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EVP_SHA224(3)                       OpenSSL                      EVP_SHA224(3)
NAME
       EVP_sha224, EVP_sha256, EVP_sha512_224, EVP_sha512_256, EVP_sha384,
       EVP_sha512 - SHA-2 For EVP
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);
DESCRIPTION
       SHA-2 (Secure Hash Algorithm 2) is a family of cryptographic hash
       functions standardized in NIST FIPS 180-4, first published in 2001.
       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.
RETURN VALUES
       These functions return a EVP_MD structure that contains the
       implementation of the symmetric cipher. See EVP_MD_meth_new(3) for
       details of the EVP_MD structure.
CONFORMING TO
       NIST FIPS 180-4.
SEE ALSO
       evp(7), EVP_DigestInit(3)
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
       <https://www.openssl.org/source/license.html>;.
1.1.1k                            2021-03-25                     EVP_SHA224(3)