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MDC2_INIT(3)			    OpenSSL			  MDC2_INIT(3)

NAME
       MDC2, MDC2_Init,	MDC2_Update, MDC2_Final	- MDC2 hash function

SYNOPSIS
	#include <openssl/mdc2.h>

	unsigned char *MDC2(const unsigned char	*d, unsigned long n,
			    unsigned char *md);

	int MDC2_Init(MDC2_CTX *c);
	int MDC2_Update(MDC2_CTX *c, const unsigned char *data,
			unsigned long len);
	int MDC2_Final(unsigned	char *md, MDC2_CTX *c);

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

       MDC2() 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	array.

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

       MDC2_Init() initializes a MDC2_CTX structure.

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

       MDC2_Final() places the message digest in md, which must	have space for
       MDC2_DIGEST_LENGTH == 16	bytes of output, and erases the	MDC2_CTX.

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

RETURN VALUES
       MDC2() returns a	pointer	to the hash value.

       MDC2_Init(), MDC2_Update() and MDC2_Final() return 1 for	success, 0
       otherwise.

CONFORMING TO
       ISO/IEC 10118-2:2000 Hash-Function 2, with DES as the underlying	block
       cipher.

SEE ALSO
       EVP_DigestInit(3)

COPYRIGHT
       Copyright 2000-2017 The OpenSSL Project Authors.	All Rights Reserved.

       Licensed	under the OpenSSL license (the "License").  You	may not	use
       this file except	in compliance with the License.	 You can obtain	a copy
       in the file LICENSE in the source distribution or at
       <https://www.openssl.org/source/license.html>.

1.1.1k				  2021-03-25			  MDC2_INIT(3)
NAME | SYNOPSIS | DESCRIPTION | RETURN VALUES | CONFORMING TO | SEE ALSO | COPYRIGHT

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