1=pod 2 3=head1 NAME 4 5EVP_md4 6- MD4 For EVP 7 8=head1 SYNOPSIS 9 10 #include <openssl/evp.h> 11 12 const EVP_MD *EVP_md4(void); 13 14=head1 DESCRIPTION 15 16MD4 is a cryptographic hash function standardized in RFC 1320 and designed by 17Ronald Rivest, first published in 1990. This implementation is only available 18with the legacy provider. 19 20=over 4 21 22=item EVP_md4() 23 24The MD4 algorithm which produces a 128-bit output from a given input. 25 26=back 27 28=head1 NOTES 29 30Developers should be aware of the negative performance implications of 31calling this function multiple times and should consider using 32L<EVP_MD_fetch(3)> instead. 33See L<crypto(7)/Performance> for further information. 34 35=head1 RETURN VALUES 36 37These functions return a B<EVP_MD> structure that contains the 38implementation of the message digest. See L<EVP_MD_meth_new(3)> for 39details of the B<EVP_MD> structure. 40 41=head1 CONFORMING TO 42 43IETF RFC 1320. 44 45=head1 SEE ALSO 46 47L<evp(7)>, 48L<provider(7)>, 49L<EVP_DigestInit(3)> 50 51=head1 COPYRIGHT 52 53Copyright 2017-2023 The OpenSSL Project Authors. All Rights Reserved. 54 55Licensed under the Apache License 2.0 (the "License"). You may not use 56this file except in compliance with the License. You can obtain a copy 57in the file LICENSE in the source distribution or at 58L<https://www.openssl.org/source/license.html>. 59 60=cut 61 62