MD5(9) MidnightBSD Kernel Developer’s Manual MD5(9)

NAME

MD5, MD5Init, MD5Transform — message digest routines

SYNOPSIS

#include <sys/types.h>
#include <sys/md5.h>

void

MD5Init(MD5_CTX *buf);

void

MD5Transform(u_int32_t buf[4], const unsigned char block[64]);

DESCRIPTION

The MD5 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 MD5Transform() will be used to produce a digest. The buf argument is the storage for the digest being produced on subsequent calls to the MD5Transform() routine.

MD5Transform

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

MidnightBSD 0.3 April 17, 1996 MidnightBSD 0.3