<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> <html><head><meta http-equiv="Content-Type" content="text/html;charset=iso-8859-1"> <title>sapphire.h Source File</title> <link href="doxygen.css" rel="stylesheet" type="text/css"> </head><body> <!-- Generated by Doxygen 1.2.15 --> <center> <a class="qindex" href="index.html">Main Page</a> <a class="qindex" href="namespaces.html">Namespace List</a> <a class="qindex" href="hierarchy.html">Class Hierarchy</a> <a class="qindex" href="classes.html">Alphabetical List</a> <a class="qindex" href="annotated.html">Compound List</a> <a class="qindex" href="files.html">File List</a> <a class="qindex" href="functions.html">Compound Members</a> </center> <hr><h1>sapphire.h</h1><div class="fragment"><pre>00001 <font class="comment">/* sapphire.h -- Interface for the Saphire II stream cipher.</font> 00002 <font class="comment"></font> 00003 <font class="comment"> Dedicated to the Public Domain the author and inventor</font> 00004 <font class="comment"> (Michael Paul Johnson). This code comes with no warranty.</font> 00005 <font class="comment"> Use it at your own risk.</font> 00006 <font class="comment"> Ported from the Pascal implementation of the Sapphire Stream</font> 00007 <font class="comment"> Cipher 9 December 1994.</font> 00008 <font class="comment"> Added hash-specific functions 27 December 1994.</font> 00009 <font class="comment"> Made index variable initialization key-dependent,</font> 00010 <font class="comment"> made the output function more resistant to cryptanalysis,</font> 00011 <font class="comment"> and renamed to Sapphire II Stream Cipher 2 January 1995.</font> 00012 <font class="comment"></font> 00013 <font class="comment"> unsigned char is assumed to be 8 bits. If it is not, the</font> 00014 <font class="comment"> results of assignments need to be reduced to 8 bits with</font> 00015 <font class="comment"> & 0xFF or % 0x100, whichever is faster.</font> 00016 <font class="comment">*/</font> 00017 00018 <font class="preprocessor">#ifndef NULL</font> 00019 <font class="preprocessor"></font><font class="preprocessor">#define NULL 0</font> 00020 <font class="preprocessor"></font><font class="preprocessor">#endif </font><font class="comment">/* */</font> 00021 <font class="keyword">class </font>sapphire 00022 { 00023 00024 <font class="comment">// These variables comprise the state of the state machine.</font> 00025 <font class="keywordtype">unsigned</font> <font class="keywordtype">char</font> cards[256]; <font class="comment">// A permutation of 0-255.</font> 00026 <font class="keywordtype">unsigned</font> <font class="keywordtype">char</font> rotor, <font class="comment">// Index that rotates smoothly</font> 00027 ratchet, <font class="comment">// Index that moves erratically</font> 00028 avalanche, <font class="comment">// Index heavily data dependent</font> 00029 last_plain, <font class="comment">// Last plain text byte</font> 00030 last_cipher; <font class="comment">// Last cipher text byte</font> 00031 00032 <font class="comment">// This function is used by initialize(), which is called by the</font> 00033 <font class="comment">// constructor.</font> 00034 <font class="keywordtype">unsigned</font> <font class="keywordtype">char</font> keyrand (<font class="keywordtype">int</font> limit, <font class="keywordtype">unsigned</font> <font class="keywordtype">char</font> *user_key, 00035 <font class="keywordtype">unsigned</font> <font class="keywordtype">char</font> keysize, <font class="keywordtype">unsigned</font> <font class="keywordtype">char</font> *rsum, 00036 <font class="keywordtype">unsigned</font> *keypos); <font class="keyword">public</font>:sapphire (<font class="keywordtype">unsigned</font> <font class="keywordtype">char</font> 00037 *key = NULL, <font class="comment">// Calls initialize if a real</font> 00038 <font class="keywordtype">unsigned</font> <font class="keywordtype">char</font> keysize = 0); <font class="comment">// key is provided. If none</font> 00039 <font class="comment">// is provided, call initialize</font> 00040 <font class="comment">// before encrypt or decrypt.</font> 00041 ~sapphire (); <font class="comment">// Destroy cipher state information.</font> 00042 <font class="keywordtype">void</font> initialize (<font class="keywordtype">unsigned</font> <font class="keywordtype">char</font> *key, <font class="comment">// User key is used to set</font> 00043 <font class="keywordtype">unsigned</font> <font class="keywordtype">char</font> keysize); <font class="comment">// up state information.</font> 00044 <font class="keywordtype">void</font> hash_init (<font class="keywordtype">void</font>); <font class="comment">// Set up default hash.</font> 00045 <font class="keywordtype">unsigned</font> <font class="keywordtype">char</font> encrypt (<font class="keywordtype">unsigned</font> <font class="keywordtype">char</font> b = 0); <font class="comment">// Encrypt byte</font> 00046 <font class="comment">// or get a random byte.</font> 00047 <font class="keywordtype">unsigned</font> <font class="keywordtype">char</font> decrypt (<font class="keywordtype">unsigned</font> <font class="keywordtype">char</font> b); <font class="comment">// Decrypt byte.</font> 00048 <font class="keywordtype">void</font> hash_final (<font class="keywordtype">unsigned</font> <font class="keywordtype">char</font> *hash, <font class="comment">// Copy hash value to hash</font> 00049 <font class="keywordtype">unsigned</font> <font class="keywordtype">char</font> hashlength = 20); <font class="comment">// Hash length (16-32)</font> 00050 <font class="keywordtype">void</font> burn (<font class="keywordtype">void</font>); <font class="comment">// Destroy cipher state information.</font> 00051 }; 00052 00053 </pre></div><hr><address align="right"><small>Generated on Thu Jun 20 22:13:00 2002 for The Sword Project by <a href="http://www.doxygen.org/index.html"> <img src="doxygen.png" alt="doxygen" align="middle" border=0 width=110 height=53></a>1.2.15 </small></address> </body> </html>