1c9490d33b98b7affb729b5f1db13cb0a348471aagl@chromium.org/* crypto/rc4/rc4_skey.c */ 2c9490d33b98b7affb729b5f1db13cb0a348471aagl@chromium.org/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) 3c9490d33b98b7affb729b5f1db13cb0a348471aagl@chromium.org * All rights reserved. 4c9490d33b98b7affb729b5f1db13cb0a348471aagl@chromium.org * 5c9490d33b98b7affb729b5f1db13cb0a348471aagl@chromium.org * This package is an SSL implementation written 6c9490d33b98b7affb729b5f1db13cb0a348471aagl@chromium.org * by Eric Young (eay@cryptsoft.com). 7c9490d33b98b7affb729b5f1db13cb0a348471aagl@chromium.org * The implementation was written so as to conform with Netscapes SSL. 8c9490d33b98b7affb729b5f1db13cb0a348471aagl@chromium.org * 9c9490d33b98b7affb729b5f1db13cb0a348471aagl@chromium.org * This library is free for commercial and non-commercial use as long as 10c9490d33b98b7affb729b5f1db13cb0a348471aagl@chromium.org * the following conditions are aheared to. The following conditions 11c9490d33b98b7affb729b5f1db13cb0a348471aagl@chromium.org * apply to all code found in this distribution, be it the RC4, RSA, 12c9490d33b98b7affb729b5f1db13cb0a348471aagl@chromium.org * lhash, DES, etc., code; not just the SSL code. The SSL documentation 13c9490d33b98b7affb729b5f1db13cb0a348471aagl@chromium.org * included with this distribution is covered by the same copyright terms 14c9490d33b98b7affb729b5f1db13cb0a348471aagl@chromium.org * except that the holder is Tim Hudson (tjh@cryptsoft.com). 15c9490d33b98b7affb729b5f1db13cb0a348471aagl@chromium.org * 16c9490d33b98b7affb729b5f1db13cb0a348471aagl@chromium.org * Copyright remains Eric Young's, and as such any Copyright notices in 17c9490d33b98b7affb729b5f1db13cb0a348471aagl@chromium.org * the code are not to be removed. 18c9490d33b98b7affb729b5f1db13cb0a348471aagl@chromium.org * If this package is used in a product, Eric Young should be given attribution 19c9490d33b98b7affb729b5f1db13cb0a348471aagl@chromium.org * as the author of the parts of the library used. 20c9490d33b98b7affb729b5f1db13cb0a348471aagl@chromium.org * This can be in the form of a textual message at program startup or 21c9490d33b98b7affb729b5f1db13cb0a348471aagl@chromium.org * in documentation (online or textual) provided with the package. 22c9490d33b98b7affb729b5f1db13cb0a348471aagl@chromium.org * 23c9490d33b98b7affb729b5f1db13cb0a348471aagl@chromium.org * Redistribution and use in source and binary forms, with or without 24c9490d33b98b7affb729b5f1db13cb0a348471aagl@chromium.org * modification, are permitted provided that the following conditions 25c9490d33b98b7affb729b5f1db13cb0a348471aagl@chromium.org * are met: 26c9490d33b98b7affb729b5f1db13cb0a348471aagl@chromium.org * 1. Redistributions of source code must retain the copyright 27c9490d33b98b7affb729b5f1db13cb0a348471aagl@chromium.org * notice, this list of conditions and the following disclaimer. 28c9490d33b98b7affb729b5f1db13cb0a348471aagl@chromium.org * 2. Redistributions in binary form must reproduce the above copyright 29c9490d33b98b7affb729b5f1db13cb0a348471aagl@chromium.org * notice, this list of conditions and the following disclaimer in the 30c9490d33b98b7affb729b5f1db13cb0a348471aagl@chromium.org * documentation and/or other materials provided with the distribution. 31c9490d33b98b7affb729b5f1db13cb0a348471aagl@chromium.org * 3. All advertising materials mentioning features or use of this software 32c9490d33b98b7affb729b5f1db13cb0a348471aagl@chromium.org * must display the following acknowledgement: 33c9490d33b98b7affb729b5f1db13cb0a348471aagl@chromium.org * "This product includes cryptographic software written by 34c9490d33b98b7affb729b5f1db13cb0a348471aagl@chromium.org * Eric Young (eay@cryptsoft.com)" 35c9490d33b98b7affb729b5f1db13cb0a348471aagl@chromium.org * The word 'cryptographic' can be left out if the rouines from the library 36c9490d33b98b7affb729b5f1db13cb0a348471aagl@chromium.org * being used are not cryptographic related :-). 37c9490d33b98b7affb729b5f1db13cb0a348471aagl@chromium.org * 4. If you include any Windows specific code (or a derivative thereof) from 38c9490d33b98b7affb729b5f1db13cb0a348471aagl@chromium.org * the apps directory (application code) you must include an acknowledgement: 39c9490d33b98b7affb729b5f1db13cb0a348471aagl@chromium.org * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" 40c9490d33b98b7affb729b5f1db13cb0a348471aagl@chromium.org * 41c9490d33b98b7affb729b5f1db13cb0a348471aagl@chromium.org * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND 42c9490d33b98b7affb729b5f1db13cb0a348471aagl@chromium.org * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 43c9490d33b98b7affb729b5f1db13cb0a348471aagl@chromium.org * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 44c9490d33b98b7affb729b5f1db13cb0a348471aagl@chromium.org * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 45c9490d33b98b7affb729b5f1db13cb0a348471aagl@chromium.org * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 46c9490d33b98b7affb729b5f1db13cb0a348471aagl@chromium.org * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 47c9490d33b98b7affb729b5f1db13cb0a348471aagl@chromium.org * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 48c9490d33b98b7affb729b5f1db13cb0a348471aagl@chromium.org * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 49c9490d33b98b7affb729b5f1db13cb0a348471aagl@chromium.org * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 50c9490d33b98b7affb729b5f1db13cb0a348471aagl@chromium.org * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 51c9490d33b98b7affb729b5f1db13cb0a348471aagl@chromium.org * SUCH DAMAGE. 52c9490d33b98b7affb729b5f1db13cb0a348471aagl@chromium.org * 53c9490d33b98b7affb729b5f1db13cb0a348471aagl@chromium.org * The licence and distribution terms for any publically available version or 54c9490d33b98b7affb729b5f1db13cb0a348471aagl@chromium.org * derivative of this code cannot be changed. i.e. this code cannot simply be 55c9490d33b98b7affb729b5f1db13cb0a348471aagl@chromium.org * copied and put under another distribution licence 56c9490d33b98b7affb729b5f1db13cb0a348471aagl@chromium.org * [including the GNU Public Licence.] 57c9490d33b98b7affb729b5f1db13cb0a348471aagl@chromium.org */ 58c9490d33b98b7affb729b5f1db13cb0a348471aagl@chromium.org 59c9490d33b98b7affb729b5f1db13cb0a348471aagl@chromium.org#include <openssl/rc4.h> 60c9490d33b98b7affb729b5f1db13cb0a348471aagl@chromium.org#include "rc4_locl.h" 61c9490d33b98b7affb729b5f1db13cb0a348471aagl@chromium.org#include <openssl/opensslv.h> 62c9490d33b98b7affb729b5f1db13cb0a348471aagl@chromium.org 63c9490d33b98b7affb729b5f1db13cb0a348471aagl@chromium.orgconst char RC4_version[]="RC4" OPENSSL_VERSION_PTEXT; 64c9490d33b98b7affb729b5f1db13cb0a348471aagl@chromium.org 65c9490d33b98b7affb729b5f1db13cb0a348471aagl@chromium.orgconst char *RC4_options(void) 66c9490d33b98b7affb729b5f1db13cb0a348471aagl@chromium.org { 67c9490d33b98b7affb729b5f1db13cb0a348471aagl@chromium.org#ifdef RC4_INDEX 68c9490d33b98b7affb729b5f1db13cb0a348471aagl@chromium.org if (sizeof(RC4_INT) == 1) 69c9490d33b98b7affb729b5f1db13cb0a348471aagl@chromium.org return("rc4(idx,char)"); 70c9490d33b98b7affb729b5f1db13cb0a348471aagl@chromium.org else 71c9490d33b98b7affb729b5f1db13cb0a348471aagl@chromium.org return("rc4(idx,int)"); 72c9490d33b98b7affb729b5f1db13cb0a348471aagl@chromium.org#else 73c9490d33b98b7affb729b5f1db13cb0a348471aagl@chromium.org if (sizeof(RC4_INT) == 1) 74c9490d33b98b7affb729b5f1db13cb0a348471aagl@chromium.org return("rc4(ptr,char)"); 75c9490d33b98b7affb729b5f1db13cb0a348471aagl@chromium.org else 76c9490d33b98b7affb729b5f1db13cb0a348471aagl@chromium.org return("rc4(ptr,int)"); 77c9490d33b98b7affb729b5f1db13cb0a348471aagl@chromium.org#endif 78c9490d33b98b7affb729b5f1db13cb0a348471aagl@chromium.org } 79c9490d33b98b7affb729b5f1db13cb0a348471aagl@chromium.org 80c9490d33b98b7affb729b5f1db13cb0a348471aagl@chromium.org/* RC4 as implemented from a posting from 81c9490d33b98b7affb729b5f1db13cb0a348471aagl@chromium.org * Newsgroups: sci.crypt 82c9490d33b98b7affb729b5f1db13cb0a348471aagl@chromium.org * From: sterndark@netcom.com (David Sterndark) 83c9490d33b98b7affb729b5f1db13cb0a348471aagl@chromium.org * Subject: RC4 Algorithm revealed. 84c9490d33b98b7affb729b5f1db13cb0a348471aagl@chromium.org * Message-ID: <sternCvKL4B.Hyy@netcom.com> 85c9490d33b98b7affb729b5f1db13cb0a348471aagl@chromium.org * Date: Wed, 14 Sep 1994 06:35:31 GMT 86c9490d33b98b7affb729b5f1db13cb0a348471aagl@chromium.org */ 87c9490d33b98b7affb729b5f1db13cb0a348471aagl@chromium.org 882c4508dfe2bc5b6296c01114ed11ddc64b7718c6digit@chromium.orgvoid private_RC4_set_key(RC4_KEY *key, int len, const unsigned char *data) 89c9490d33b98b7affb729b5f1db13cb0a348471aagl@chromium.org { 90c9490d33b98b7affb729b5f1db13cb0a348471aagl@chromium.org register RC4_INT tmp; 91c9490d33b98b7affb729b5f1db13cb0a348471aagl@chromium.org register int id1,id2; 92c9490d33b98b7affb729b5f1db13cb0a348471aagl@chromium.org register RC4_INT *d; 93c9490d33b98b7affb729b5f1db13cb0a348471aagl@chromium.org unsigned int i; 94c9490d33b98b7affb729b5f1db13cb0a348471aagl@chromium.org 95c9490d33b98b7affb729b5f1db13cb0a348471aagl@chromium.org d= &(key->data[0]); 96c9490d33b98b7affb729b5f1db13cb0a348471aagl@chromium.org key->x = 0; 97c9490d33b98b7affb729b5f1db13cb0a348471aagl@chromium.org key->y = 0; 98c9490d33b98b7affb729b5f1db13cb0a348471aagl@chromium.org id1=id2=0; 99c9490d33b98b7affb729b5f1db13cb0a348471aagl@chromium.org 100c9490d33b98b7affb729b5f1db13cb0a348471aagl@chromium.org#define SK_LOOP(d,n) { \ 101c9490d33b98b7affb729b5f1db13cb0a348471aagl@chromium.org tmp=d[(n)]; \ 102c9490d33b98b7affb729b5f1db13cb0a348471aagl@chromium.org id2 = (data[id1] + tmp + id2) & 0xff; \ 103c9490d33b98b7affb729b5f1db13cb0a348471aagl@chromium.org if (++id1 == len) id1=0; \ 104c9490d33b98b7affb729b5f1db13cb0a348471aagl@chromium.org d[(n)]=d[id2]; \ 105c9490d33b98b7affb729b5f1db13cb0a348471aagl@chromium.org d[id2]=tmp; } 106c9490d33b98b7affb729b5f1db13cb0a348471aagl@chromium.org 107c9490d33b98b7affb729b5f1db13cb0a348471aagl@chromium.org for (i=0; i < 256; i++) d[i]=i; 108c9490d33b98b7affb729b5f1db13cb0a348471aagl@chromium.org for (i=0; i < 256; i+=4) 109c9490d33b98b7affb729b5f1db13cb0a348471aagl@chromium.org { 110c9490d33b98b7affb729b5f1db13cb0a348471aagl@chromium.org SK_LOOP(d,i+0); 111c9490d33b98b7affb729b5f1db13cb0a348471aagl@chromium.org SK_LOOP(d,i+1); 112c9490d33b98b7affb729b5f1db13cb0a348471aagl@chromium.org SK_LOOP(d,i+2); 113c9490d33b98b7affb729b5f1db13cb0a348471aagl@chromium.org SK_LOOP(d,i+3); 114c9490d33b98b7affb729b5f1db13cb0a348471aagl@chromium.org } 115c9490d33b98b7affb729b5f1db13cb0a348471aagl@chromium.org } 116c9490d33b98b7affb729b5f1db13cb0a348471aagl@chromium.org 117