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    1/*  Part of SWI-Prolog
    2
    3    Author:        Jan Wielemaker
    4    E-mail:        J.Wielemaker@vu.nl
    5    WWW:           http://www.swi-prolog.org
    6    Copyright (c)  2015-2016, VU University Amsterdam
    7    All rights reserved.
    8
    9    Redistribution and use in source and binary forms, with or without
   10    modification, are permitted provided that the following conditions
   11    are met:
   12
   13    1. Redistributions of source code must retain the above copyright
   14       notice, this list of conditions and the following disclaimer.
   15
   16    2. Redistributions in binary form must reproduce the above copyright
   17       notice, this list of conditions and the following disclaimer in
   18       the documentation and/or other materials provided with the
   19       distribution.
   20
   21    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
   22    "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
   23    LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
   24    FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
   25    COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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   27    BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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   33*/
   34
   35:- module(md5,
   36          [ md5_hash/3                  % +Input, -Hash, +Options
   37          ]).   38
   39:- use_foreign_library(foreign(md54pl)).

MD5 hashes

Compute MD5 hashes from a Prolog string. This library provides a lightweight alternative to the general secure hash interface provided by library(crypto) from the ssl package.

See also: - library(sha), library(hash_stream) and library(crypto). */

md5_hash(+Data, -Hash, +Options) is det

Hash is the MD5 hash of Data, The conversion is controlled by Options:

encoding(+Encoding): If Data is a sequence of character codes, this must be translated into a sequence of bytes, because that is what the hashing requires. The default encoding is utf8. The other meaningful value is octet, claiming that Data contains raw bytes.

Arguments:

`Data`	- is either an atom, string, code-list or char-list.
`Hash`	- is an atom holding 32 characters, representing the hash in hexadecimal notation

   66:- multifile sandbox:safe_primitive/1.   67
   68sandbox:safe_primitive(md5:md5_hash(_,_,_))