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authorJung-uk Kim <jkim@FreeBSD.org>2018-09-13 19:18:07 +0000
committerJung-uk Kim <jkim@FreeBSD.org>2018-09-13 19:18:07 +0000
commita43ce912fc025d11e1395506111f75fc194d7ba5 (patch)
tree9794cf7720d75938ed0ea4f499c0dcd4b6eacdda /doc/crypto/md5.pod
parent02be298e504b8554caca6dc85af450e1ea44d19d (diff)
downloadsrc-test2-a43ce912fc025d11e1395506111f75fc194d7ba5.tar.gz
src-test2-a43ce912fc025d11e1395506111f75fc194d7ba5.zip
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-=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