mirror of
https://github.com/openssl/openssl.git
synced 2024-12-27 06:21:43 +08:00
116 lines
3.6 KiB
Plaintext
116 lines
3.6 KiB
Plaintext
=pod
|
|
|
|
=head1 NAME
|
|
|
|
MD2, MD4, MD5, MD2_Init, MD2_Update, MD2_Final, MD4_Init, MD4_Update,
|
|
MD4_Final, MD5_Init, MD5_Update, MD5_Final - MD2, MD4, and MD5 hash functions
|
|
|
|
=head1 SYNOPSIS
|
|
|
|
#include <openssl/md2.h>
|
|
|
|
The following functions have been deprecated since OpenSSL 3.0, and can be
|
|
hidden entirely by defining B<OPENSSL_API_COMPAT> with a suitable version value,
|
|
see L<openssl_user_macros(7)>:
|
|
|
|
unsigned char *MD2(const unsigned char *d, unsigned long n, unsigned char *md);
|
|
|
|
int MD2_Init(MD2_CTX *c);
|
|
int MD2_Update(MD2_CTX *c, const unsigned char *data, unsigned long len);
|
|
int MD2_Final(unsigned char *md, MD2_CTX *c);
|
|
|
|
|
|
#include <openssl/md4.h>
|
|
|
|
The following functions have been deprecated since OpenSSL 3.0, and can be
|
|
hidden entirely by defining B<OPENSSL_API_COMPAT> with a suitable version value,
|
|
see L<openssl_user_macros(7)>:
|
|
|
|
unsigned char *MD4(const unsigned char *d, unsigned long n, unsigned char *md);
|
|
|
|
int MD4_Init(MD4_CTX *c);
|
|
int MD4_Update(MD4_CTX *c, const void *data, unsigned long len);
|
|
int MD4_Final(unsigned char *md, MD4_CTX *c);
|
|
|
|
|
|
#include <openssl/md5.h>
|
|
|
|
The following functions have been deprecated since OpenSSL 3.0, and can be
|
|
hidden entirely by defining B<OPENSSL_API_COMPAT> with a suitable version value,
|
|
see L<openssl_user_macros(7)>:
|
|
|
|
unsigned char *MD5(const unsigned char *d, unsigned long n, unsigned char *md);
|
|
|
|
int MD5_Init(MD5_CTX *c);
|
|
int MD5_Update(MD5_CTX *c, const void *data, unsigned long len);
|
|
int MD5_Final(unsigned char *md, MD5_CTX *c);
|
|
|
|
=head1 DESCRIPTION
|
|
|
|
All of the functions described on this page are deprecated.
|
|
Applications should instead use L<EVP_DigestInit_ex(3)>, L<EVP_DigestUpdate(3)>
|
|
and L<EVP_DigestFinal_ex(3)>.
|
|
|
|
MD2, MD4, and MD5 are cryptographic hash functions with a 128 bit output.
|
|
|
|
MD2(), MD4(), and MD5() compute the MD2, MD4, and MD5 message digest
|
|
of the B<n> bytes at B<d> and place it in B<md> (which must have space
|
|
for MD2_DIGEST_LENGTH == MD4_DIGEST_LENGTH == MD5_DIGEST_LENGTH == 16
|
|
bytes of output). If B<md> is NULL, the digest is placed in a static
|
|
array.
|
|
|
|
The following functions may be used if the message is not completely
|
|
stored in memory:
|
|
|
|
MD2_Init() initializes a B<MD2_CTX> structure.
|
|
|
|
MD2_Update() can be called repeatedly with chunks of the message to
|
|
be hashed (B<len> bytes at B<data>).
|
|
|
|
MD2_Final() places the message digest in B<md>, which must have space
|
|
for MD2_DIGEST_LENGTH == 16 bytes of output, and erases the B<MD2_CTX>.
|
|
|
|
MD4_Init(), MD4_Update(), MD4_Final(), MD5_Init(), MD5_Update(), and
|
|
MD5_Final() are analogous using an B<MD4_CTX> and B<MD5_CTX> structure.
|
|
|
|
Applications should use the higher level functions
|
|
L<EVP_DigestInit(3)>
|
|
etc. instead of calling the hash functions directly.
|
|
|
|
=head1 NOTE
|
|
|
|
MD2, MD4, and MD5 are recommended only for compatibility with existing
|
|
applications. In new applications, hashes from the SHA-2 or SHA-3 family
|
|
should be preferred.
|
|
|
|
=head1 RETURN VALUES
|
|
|
|
MD2(), MD4(), and MD5() return pointers to the hash value.
|
|
|
|
MD2_Init(), MD2_Update(), MD2_Final(), MD4_Init(), MD4_Update(),
|
|
MD4_Final(), MD5_Init(), MD5_Update(), and MD5_Final() return 1 for
|
|
success, 0 otherwise.
|
|
|
|
=head1 CONFORMING TO
|
|
|
|
RFC 1319, RFC 1320, RFC 1321
|
|
|
|
=head1 SEE ALSO
|
|
|
|
L<EVP_DigestInit(3)>, L<EVP_MD-SHA2(7)>, L<EVP_MD-SHA3(7)>
|
|
|
|
=head1 HISTORY
|
|
|
|
All of these functions were deprecated in OpenSSL 3.0.
|
|
|
|
=head1 COPYRIGHT
|
|
|
|
Copyright 2000-2023 The OpenSSL Project Authors. All Rights Reserved.
|
|
|
|
Licensed under the Apache License 2.0 (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
|
|
L<https://www.openssl.org/source/license.html>.
|
|
|
|
=cut
|