102 lines
2.8 KiB
Plaintext
102 lines
2.8 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>
|
|
|
|
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>
|
|
|
|
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>
|
|
|
|
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
|
|
|
|
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)|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, SHA-1 or RIPEMD-160 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<sha(3)|sha(3)>, L<ripemd(3)|ripemd(3)>, L<EVP_DigestInit(3)|EVP_DigestInit(3)>
|
|
|
|
=head1 HISTORY
|
|
|
|
MD2(), MD2_Init(), MD2_Update() MD2_Final(), MD5(), MD5_Init(),
|
|
MD5_Update() and MD5_Final() are available in all versions of SSLeay
|
|
and OpenSSL.
|
|
|
|
MD4(), MD4_Init(), and MD4_Update() are available in OpenSSL 0.9.6 and
|
|
above.
|
|
|
|
=cut
|