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author | marha <marha@users.sourceforge.net> | 2009-06-28 22:07:26 +0000 |
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committer | marha <marha@users.sourceforge.net> | 2009-06-28 22:07:26 +0000 |
commit | 3562e78743202e43aec8727005182a2558117eca (patch) | |
tree | 8f9113a77d12470c5c851a2a8e4cb02e89df7d43 /openssl/doc/crypto/md5.pod | |
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Diffstat (limited to 'openssl/doc/crypto/md5.pod')
-rw-r--r-- | openssl/doc/crypto/md5.pod | 101 |
1 files changed, 101 insertions, 0 deletions
diff --git a/openssl/doc/crypto/md5.pod b/openssl/doc/crypto/md5.pod new file mode 100644 index 000000000..d11d5c32c --- /dev/null +++ b/openssl/doc/crypto/md5.pod @@ -0,0 +1,101 @@ +=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 |