mdc2 man page on DigitalUNIX

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MDC2(3)								       MDC2(3)

       MDC2, MDC2_Init, MDC2_Update, MDC2_Final - MDC2 hash function

       #include <openssl/mdc2.h>

       unsigned char *MDC2(
	       const	 unsigned     char     *d,     unsigned	    long    n,
       unsigned char *md ); void MDC2_Init(
	       MDC2_CTX *c ); void MDC2_Update(
	       MDC2_CTX	    *c,	     const	unsigned      char	*data,
       unsigned long len ); void MDC2_Final(
	       unsigned char *md, MDC2_CTX *c );

       MDC2  is	 a method to construct hash functions with 128 bit output from
       block ciphers.  These functions are an implementation of MDC2 with DES.

       The MDC2() function computes the MDC2 message digest of the n bytes  at
       d  and places it in md (which must have space for MDC2_DIGEST_LENGTH ==
       16 bytes of output). If md is NULL, the digest is placed	 in  a	static

       The  following  functions  can be used if the message is not completely
       stored in memory:

       The MDC2_Init() function initializes a MDC2_CTX structure.

       The MDC2_Update() function can be called repeatedly with chunks of  the
       message to be hashed (len bytes at data).

       The  MDC2_Final()  function places the message digest in md, which must
       have space for MDC2_DIGEST_LENGTH == 16 bytes of output, and erases the

       Applications  should use the higher level functions, such as EVP_Digesā€
       tInit(), instead of calling the hash functions directly.

       MDC2 conforms to ISO/IEC 10118-2, with DES.

       The MDC2() function returns a pointer to the hash value.

       The MDC2_Init(),	 MDC2_Update(),	 and  MDC2_Final()  functions  do  not
       return values.

       The  MDC2(), MDC2_Init(), MDC2_Update(), and MDC2_Final() functions are
       available since SSLeay 0.8.

       Functions: sha(3), EVP_DigestInit(3)


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