1656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project/* crypto/rc4/rc4_skey.c */ 2656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) 3656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * All rights reserved. 4656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * 5656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * This package is an SSL implementation written 6656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * by Eric Young (eay@cryptsoft.com). 7656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * The implementation was written so as to conform with Netscapes SSL. 8656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * 9656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * This library is free for commercial and non-commercial use as long as 10656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * the following conditions are aheared to. The following conditions 11656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * apply to all code found in this distribution, be it the RC4, RSA, 12656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * lhash, DES, etc., code; not just the SSL code. The SSL documentation 13656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * included with this distribution is covered by the same copyright terms 14656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * except that the holder is Tim Hudson (tjh@cryptsoft.com). 15656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * 16656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * Copyright remains Eric Young's, and as such any Copyright notices in 17656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * the code are not to be removed. 18656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * If this package is used in a product, Eric Young should be given attribution 19656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * as the author of the parts of the library used. 20656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * This can be in the form of a textual message at program startup or 21656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * in documentation (online or textual) provided with the package. 22656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * 23656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * Redistribution and use in source and binary forms, with or without 24656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * modification, are permitted provided that the following conditions 25656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * are met: 26656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * 1. Redistributions of source code must retain the copyright 27656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * notice, this list of conditions and the following disclaimer. 28656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * 2. Redistributions in binary form must reproduce the above copyright 29656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * notice, this list of conditions and the following disclaimer in the 30656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * documentation and/or other materials provided with the distribution. 31656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * 3. All advertising materials mentioning features or use of this software 32656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * must display the following acknowledgement: 33656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * "This product includes cryptographic software written by 34656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * Eric Young (eay@cryptsoft.com)" 35656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * The word 'cryptographic' can be left out if the rouines from the library 36656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * being used are not cryptographic related :-). 37656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * 4. If you include any Windows specific code (or a derivative thereof) from 38656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * the apps directory (application code) you must include an acknowledgement: 39656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" 40656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * 41656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND 42656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 43656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 44656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 45656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 46656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 47656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 48656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 49656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 50656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 51656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * SUCH DAMAGE. 52656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * 53656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * The licence and distribution terms for any publically available version or 54656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * derivative of this code cannot be changed. i.e. this code cannot simply be 55656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * copied and put under another distribution licence 56656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * [including the GNU Public Licence.] 57656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project */ 58656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 59656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project#include <openssl/rc4.h> 60656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project#include "rc4_locl.h" 61656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project#include <openssl/opensslv.h> 62656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 63656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Projectconst char RC4_version[]="RC4" OPENSSL_VERSION_PTEXT; 64656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 65656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Projectconst char *RC4_options(void) 66656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 67656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project#ifdef RC4_INDEX 68656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (sizeof(RC4_INT) == 1) 69656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project return("rc4(idx,char)"); 70656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project else 71656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project return("rc4(idx,int)"); 72656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project#else 73656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (sizeof(RC4_INT) == 1) 74656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project return("rc4(ptr,char)"); 75656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project else 76656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project return("rc4(ptr,int)"); 77656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project#endif 78656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 79656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 80656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project/* RC4 as implemented from a posting from 81656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * Newsgroups: sci.crypt 82656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * From: sterndark@netcom.com (David Sterndark) 83656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * Subject: RC4 Algorithm revealed. 84656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * Message-ID: <sternCvKL4B.Hyy@netcom.com> 85656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * Date: Wed, 14 Sep 1994 06:35:31 GMT 86656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project */ 87656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 88392aa7cc7d2b122614c5393c3e357da07fd07af3Brian Carlstromvoid private_RC4_set_key(RC4_KEY *key, int len, const unsigned char *data) 89656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 90656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project register RC4_INT tmp; 91656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project register int id1,id2; 92656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project register RC4_INT *d; 93656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project unsigned int i; 94656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 95656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project d= &(key->data[0]); 96656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project key->x = 0; 97656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project key->y = 0; 98656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project id1=id2=0; 99656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 100656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project#define SK_LOOP(d,n) { \ 101656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project tmp=d[(n)]; \ 102656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project id2 = (data[id1] + tmp + id2) & 0xff; \ 103656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (++id1 == len) id1=0; \ 104656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project d[(n)]=d[id2]; \ 105656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project d[id2]=tmp; } 106656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 107656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project for (i=0; i < 256; i++) d[i]=i; 108656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project for (i=0; i < 256; i+=4) 109656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 110656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project SK_LOOP(d,i+0); 111656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project SK_LOOP(d,i+1); 112656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project SK_LOOP(d,i+2); 113656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project SK_LOOP(d,i+3); 114656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 115656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 116656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 117