Manual Pages for UNIX Operating System command usage for man MD4_Update

OpenSSL                                             md5(3openssl)



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     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

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      #include 

      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 

      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 

      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);


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     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 nnnn bytes at dddd and place it in mmmmdddd (which
     must have space for MD2_DIGEST_LENGTH == MD4_DIGEST_LENGTH
     == MD5_DIGEST_LENGTH == 16 bytes of output). If mmmmdddd 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 MMMMDDDD2222_CCCCTTTTXXXX structure.




27/Oct/2006            Last change: 0.9.8o                      1






OpenSSL                                             md5(3openssl)



     MD2_Update() can be called repeatedly with chunks of the
     message to be hashed (lllleeeennnn bytes at ddddaaaattttaaaa).

     MD2_Final() places the message digest in mmmmdddd, which must have
     space for MD2_DIGEST_LENGTH == 16 bytes of output, and
     erases the MMMMDDDD2222_CCCCTTTTXXXX.

     MD4_Init(), MD4_Update(), MD4_Final(), MD5_Init(),
     MD5_Update(), and MD5_Final() are analogous using an MMMMDDDD4444_CCCCTTTTXXXX
     and MMMMDDDD5555_CCCCTTTTXXXX structure.

     Applications should use the higher level functions
     EVP_DigestInit(3) etc. instead of calling the hash functions
     directly.

NNNNOOOOTTTTEEEE
     MD2, MD4, and MD5 are recommended only for compatibility
     with existing applications. In new applications, SHA-1 or
     RIPEMD-160 should be preferred.

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     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.

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     RFC 1319, RFC 1320, RFC 1321

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     sha(3), ripemd(3), EVP_DigestInit(3)

HHHHIIIISSSSTTTTOOOORRRRYYYY
     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.















27/Oct/2006            Last change: 0.9.8o                      2