CCMD5(3cc) LOCAL CCMD5(3cc)

NAME
     CCCCMMDD22IInniitt CCCCMMDD22UUppddaattee CCCCMMDD22FFiinnaall CCCCMMDD22

     CCCCMMDD44IInniitt CCCCMMDD44UUppddaattee CCCCMMDD44FFiinnaall CCCCMMDD44

     CCCCMMDD55IInniitt CCCCMMDD55UUppddaattee CCCCMMDD55FFiinnaall CCCCMMDD55

     - MD2, MD4, and MD5 hash functions

SYNOPSIS
     ##iinncclluuddee <>

     extern int
     CCCCMMDD22IInniitt(CCMD2CTX *c);

     extern int
     CCCCMMDD22UUppddaattee(CCMD2CTX *c, const void *data, CCLONG len);

     extern int
     CCCCMMDD22FFiinnaall(unsigned char *md, CCMD2CTX *c);

     extern unsigned char *
     CCCCMMDD22(const void *data, CCLONG len, unsigned char *md);

     extern int
     CCCCMMDD44IInniitt(CCMD4CTX *c);

     extern int
     CCCCMMDD44UUppddaattee(CCMD4CTX *c, const void *data, CCLONG len);

     extern int
     CCCCMMDD44FFiinnaall(unsigned char *md, CCMD4CTX *c);

     extern unsigned char *
     CCCCMMDD44(const void *data, CCLONG len, unsigned char *md);

     extern int
     CCCCMMDD55IInniitt(CCMD5CTX *c);

     extern int
     CCCCMMDD55UUppddaattee(CCMD5CTX *c, const void *data, CCLONG len);

     extern int
     CCCCMMDD55FFiinnaall(unsigned char *md, CCMD5CTX *c);

     extern unsigned char *
     CCCCMMDD55(const void *data, CCLONG len, unsigned char *md);

DESCRIPTION
     The following functions are used to produce an hash from data:

     CCCCMMDD22IInniitt() initializes a CCMD2CTX structure.

     CCCCMMDD22UUppddaattee() can be called repeatedly with chunks of the message to be
     hashed (len bytes at data).

     CCCCMMDD22FFiinnaall() places the MD2 message digest in md, which must have space
     for CCMD2DIGESTLENGTH == 16 bytes of output, and erases the
     CCMD2CTX.

     CCCCMMDD22() computes the MD2 message digest of the len bytes at data and
     places it in md (which must have space for CCMD2DIGESTLENGTH == 16
     bytes of output). It returns the md pointer.

     CCCCMMDD44IInniitt(), CCCCMMDD44UUppddaattee(), CCCCMMDD44FFiinnaall(), CCCCMMDD44(), CCCCMMDD55IInniitt(),
     CCCCMMDD55UUppddaattee(), CCCCMMDD55FFiinnaall(), and CCCCMMDD55() are analogous using an
     CCMD4CTX and CCMD5CTX structure.

NNOOTTEE
     MD2, MD4, and MD5 are recommended only for compatibility with existing
     applications. In new applications, SHA-256(or greater) should be pre-
     ferred.

RETURN VALUES
     All routines return 1 except for the one-shot routines ( CCCCMMDD22() ,
     etc.), which return the pointer passed in via the md parameter.

CCOONNFFOORRMMIINNGG TTOO
     RFC 1319, RFC 1320, RFC 1321

SEE ALSO
     CCcrypto(3cc), CCSHA(3cc), CCHmac(3cc), CCCryptor(3cc)

HISTORY     These functions are available in OS X 10.4 and later.

     These functions provide similar functionality to the routines found in
     OpenSSL 0.9.6 and may use the same implementation.

BSD                              April 5, 2007                             BSD