OpenBSD manual page server

NAME

MD5Init, MD5Transform — message digest routines

SYNOPSIS

#include <sys/kernel.h>

void
MD5Init(u_int32_t buf[4]);

void
MD5Transform(u_int32_t buf[4], u_int32_t const in[16]);

DESCRIPTION

The MD5Init 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 16 longwords of new data passed in in 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".

SEE ALSO

random(4), arc4random(9)