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EVP_sha1(3) OpenSSL EVP_sha1(3) NAME EVP_sha1 - SHA-1 For EVP LIBRARY libcrypto, -lcrypto SYNOPSIS #include <openssl/evp.h> const EVP_MD *EVP_sha1(void); DESCRIPTION SHA-1 (Secure Hash Algorithm 1) is a cryptographic hash function standardized in NIST FIPS 180-4. The algorithm was designed by the United States National Security Agency and initially published in 1995. EVP_sha1() The SHA-1 algorithm which produces a 160-bit output from a given input. 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 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>. 1.1.1 2018-09-17 EVP_sha1(3)