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61 lines
1.3 KiB
Plaintext
61 lines
1.3 KiB
Plaintext
=pod
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=head1 NAME
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EVP_sha1
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- SHA-1 For EVP
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=head1 SYNOPSIS
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#include <openssl/evp.h>
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const EVP_MD *EVP_sha1(void);
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=head1 DESCRIPTION
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SHA-1 (Secure Hash Algorithm 1) is a cryptographic hash function standardized
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in NIST FIPS 180-4. The algorithm was designed by the United States National
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Security Agency and initially published in 1995.
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=over 4
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=item EVP_sha1()
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The SHA-1 algorithm which produces a 160-bit output from a given input.
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=back
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=head1 NOTES
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Developers should be aware of the negative performance implications of
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calling this function multiple times and should consider using
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L<EVP_MD_fetch(3)> instead.
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See L<crypto(7)/Performance> for further information.
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=head1 RETURN VALUES
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These functions return a B<EVP_MD> structure that contains the
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implementation of the message digest. See L<EVP_MD_meth_new(3)> for
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details of the B<EVP_MD> structure.
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=head1 CONFORMING TO
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NIST FIPS 180-4.
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=head1 SEE ALSO
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L<evp(7)>,
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L<EVP_DigestInit(3)>
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=head1 COPYRIGHT
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Copyright 2017-2023 The OpenSSL Project Authors. All Rights Reserved.
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Licensed under the Apache License 2.0 (the "License"). You may not use
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this file except in compliance with the License. You can obtain a copy
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in the file LICENSE in the source distribution or at
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L<https://www.openssl.org/source/license.html>.
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=cut
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