iOS Manual Pages

This document is a Mac OS X manual page. Manual pages are a command-line technology for providing documentation. You can view these manual pages locally using the man(1) command. These manual pages come from many different sources, and thus, have a variety of writing styles.

For more information about the manual page format, see the manual page for manpages(5).

CC_MD5(3cc)                          LOCAL                         CC_MD5(3cc)

NAME
     CC_MD2_Init CC_MD2_Update CC_MD2_Final CC_MD2

     CC_MD4_Init CC_MD4_Update CC_MD4_Final CC_MD4

     CC_MD5_Init CC_MD5_Update CC_MD5_Final CC_MD5

     -- MD2, MD4, and MD5 hash functions

SYNOPSIS
     #include <CommonCrypto/CommonDigest.h>

     extern int
     CC_MD2_Init(CC_MD2_CTX *c);

     extern int
     CC_MD2_Update(CC_MD2_CTX *c, const void *data, CC_LONG len);

     extern int
     CC_MD2_Final(unsigned char *md, CC_MD2_CTX *c);

     extern unsigned char *
     CC_MD2(const void *data, CC_LONG len, unsigned char *md);

     extern int
     CC_MD4_Init(CC_MD4_CTX *c);

     extern int
     CC_MD4_Update(CC_MD4_CTX *c, const void *data, CC_LONG len);

     extern int
     CC_MD4_Final(unsigned char *md, CC_MD4_CTX *c);

     extern unsigned char *
     CC_MD4(const void *data, CC_LONG len, unsigned char *md);

     extern int
     CC_MD5_Init(CC_MD5_CTX *c);

     extern int
     CC_MD5_Update(CC_MD5_CTX *c, const void *data, CC_LONG len);

     extern int
     CC_MD5_Final(unsigned char *md, CC_MD5_CTX *c);

     extern unsigned char *
     CC_MD5(const void *data, CC_LONG len, unsigned char *md);

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

     CC_MD2_Init() initializes a CC_MD2_CTX structure.

     CC_MD2_Update() can be called repeatedly with chunks of the message to be
     hashed (len bytes at data).

     CC_MD2_Final() places the MD2 message digest in md, which must have space
     for CC_MD2_DIGEST_LENGTH == 16 bytes of output, and erases the
     CC_MD2_CTX.

     CC_MD2() computes the MD2 message digest of the len bytes at data and
     places it in md (which must have space for CC_MD2_DIGEST_LENGTH == 16
     bytes of output). It returns the md pointer.

     CC_MD4_Init(), CC_MD4_Update(), CC_MD4_Final(), CC_MD4(), CC_MD5_Init(),
     CC_MD5_Update(), CC_MD5_Final(), and CC_MD5() are analogous using an
     CC_MD4_CTX and CC_MD5_CTX structure.

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

RETURN VALUES
     All routines return 1 except for the one-shot routines ( CC_MD2() ,
     etc.), which return the pointer passed in via the md parameter.

CONFORMING TO
     RFC 1319, RFC 1320, RFC 1321

SEE ALSO
     CC_crypto(3cc), CC_SHA(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