MD5Init (9)

Leading comments

	$OpenBSD: md5.9,v 1.1 1996/04/17 21:40:14 mickey Exp $

 Copyright (c) 1996	Michael Shalayeff
 All rights reserved.

 Redistribution and use in source and binary forms, with or without
 modification, are permitted provided that the following conditions
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 1. Redistributions of source code must retain the above copyright
    notice, this list of conditions and the following disclaimer.
 2. Redistributions in binary form must reproduce the above copyright
    notice, this list of condi...

(The comments found at the beginning of the groff file "man9/MD5Init.9freebsd".)

NAME

MD5 MD5Init MD5Transform - message digest routines

SYNOPSIS

In sys/types.h In sys/md5.h Ft void Fn MD5Init MD5_CTX *buf Ft void Fn MD5Transform uint32_t buf[4] const unsigned char block[64]

DESCRIPTION

The ifconfig module implements the RSA Data Security, Inc. MD5 Message-Digest Algorithm (MD5). It produces 128-bit MD5 Digest of data.

MD5Init

must be called just before Fn MD5Transform will be used to produce a digest. The Fa buf argument is the storage for the digest being produced on subsequent calls to the Fn MD5Transform routine.

MD5Transform

is the core of the MD5 algorithm, this alters an existing MD5 hash kept in Fa buf to reflect the addition of 64 characters of new data passed in Fa block argument.

COPYRIGHTS

The code for MD5 transform was taken from Colin Plumb's implementation, which has been placed in the public domain. The MD5 cryptographic checksum was devised by Ronald Rivest, and is documented in RFC 1321, "The MD5 Message Digest Algorithm".