1EVP_SHA1(3ossl)                     OpenSSL                    EVP_SHA1(3ossl)
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NAME

6       EVP_sha1 - SHA-1 For EVP
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SYNOPSIS

9        #include <openssl/evp.h>
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11        const EVP_MD *EVP_sha1(void);
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DESCRIPTION

14       SHA-1 (Secure Hash Algorithm 1) is a cryptographic hash function
15       standardized in NIST FIPS 180-4. The algorithm was designed by the
16       United States National Security Agency and initially published in 1995.
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18       EVP_sha1()
19           The SHA-1 algorithm which produces a 160-bit output from a given
20           input.
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NOTES

23       Developers should be aware of the negative performance implications of
24       calling this function multiple times and should consider using
25       EVP_MD_fetch(3) instead.  See "Performance" in crypto(7) for further
26       information.
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RETURN VALUES

29       These functions return a EVP_MD structure that contains the
30       implementation of the message digest. See EVP_MD_meth_new(3) for
31       details of the EVP_MD structure.
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CONFORMING TO

34       NIST FIPS 180-4.
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SEE ALSO

37       evp(7), EVP_DigestInit(3)
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40       Copyright 2017-2023 The OpenSSL Project Authors. All Rights Reserved.
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42       Licensed under the Apache License 2.0 (the "License").  You may not use
43       this file except in compliance with the License.  You can obtain a copy
44       in the file LICENSE in the source distribution or at
45       <https://www.openssl.org/source/license.html>.
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493.1.1                             2023-08-31                   EVP_SHA1(3ossl)
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