155714Skris/* crypto/rc2/rc2_skey.c */ 255714Skris/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) 355714Skris * All rights reserved. 455714Skris * 555714Skris * This package is an SSL implementation written 655714Skris * by Eric Young (eay@cryptsoft.com). 755714Skris * The implementation was written so as to conform with Netscapes SSL. 8296465Sdelphij * 955714Skris * This library is free for commercial and non-commercial use as long as 1055714Skris * the following conditions are aheared to. The following conditions 1155714Skris * apply to all code found in this distribution, be it the RC4, RSA, 1255714Skris * lhash, DES, etc., code; not just the SSL code. The SSL documentation 1355714Skris * included with this distribution is covered by the same copyright terms 1455714Skris * except that the holder is Tim Hudson (tjh@cryptsoft.com). 15296465Sdelphij * 1655714Skris * Copyright remains Eric Young's, and as such any Copyright notices in 1755714Skris * the code are not to be removed. 1855714Skris * If this package is used in a product, Eric Young should be given attribution 1955714Skris * as the author of the parts of the library used. 2055714Skris * This can be in the form of a textual message at program startup or 2155714Skris * in documentation (online or textual) provided with the package. 22296465Sdelphij * 2355714Skris * Redistribution and use in source and binary forms, with or without 2455714Skris * modification, are permitted provided that the following conditions 2555714Skris * are met: 2655714Skris * 1. Redistributions of source code must retain the copyright 2755714Skris * notice, this list of conditions and the following disclaimer. 2855714Skris * 2. Redistributions in binary form must reproduce the above copyright 2955714Skris * notice, this list of conditions and the following disclaimer in the 3055714Skris * documentation and/or other materials provided with the distribution. 3155714Skris * 3. All advertising materials mentioning features or use of this software 3255714Skris * must display the following acknowledgement: 3355714Skris * "This product includes cryptographic software written by 3455714Skris * Eric Young (eay@cryptsoft.com)" 3555714Skris * The word 'cryptographic' can be left out if the rouines from the library 3655714Skris * being used are not cryptographic related :-). 37296465Sdelphij * 4. If you include any Windows specific code (or a derivative thereof) from 3855714Skris * the apps directory (application code) you must include an acknowledgement: 3955714Skris * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" 40296465Sdelphij * 4155714Skris * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND 4255714Skris * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 4355714Skris * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 4455714Skris * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 4555714Skris * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 4655714Skris * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 4755714Skris * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 4855714Skris * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 4955714Skris * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 5055714Skris * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 5155714Skris * SUCH DAMAGE. 52296465Sdelphij * 5355714Skris * The licence and distribution terms for any publically available version or 5455714Skris * derivative of this code cannot be changed. i.e. this code cannot simply be 5555714Skris * copied and put under another distribution licence 5655714Skris * [including the GNU Public Licence.] 5755714Skris */ 5855714Skris 5955714Skris#include <openssl/rc2.h> 60194206Ssimon#include <openssl/crypto.h> 61194206Ssimon#ifdef OPENSSL_FIPS 62296465Sdelphij# include <openssl/fips.h> 63194206Ssimon#endif 64194206Ssimon 6555714Skris#include "rc2_locl.h" 6655714Skris 67296465Sdelphijstatic unsigned char key_table[256] = { 68296465Sdelphij 0xd9, 0x78, 0xf9, 0xc4, 0x19, 0xdd, 0xb5, 0xed, 0x28, 0xe9, 0xfd, 0x79, 69296465Sdelphij 0x4a, 0xa0, 0xd8, 0x9d, 0xc6, 0x7e, 0x37, 0x83, 0x2b, 0x76, 0x53, 0x8e, 70296465Sdelphij 0x62, 0x4c, 0x64, 0x88, 0x44, 0x8b, 0xfb, 0xa2, 0x17, 0x9a, 0x59, 0xf5, 71296465Sdelphij 0x87, 0xb3, 0x4f, 0x13, 0x61, 0x45, 0x6d, 0x8d, 0x09, 0x81, 0x7d, 0x32, 72296465Sdelphij 0xbd, 0x8f, 0x40, 0xeb, 0x86, 0xb7, 0x7b, 0x0b, 0xf0, 0x95, 0x21, 0x22, 73296465Sdelphij 0x5c, 0x6b, 0x4e, 0x82, 0x54, 0xd6, 0x65, 0x93, 0xce, 0x60, 0xb2, 0x1c, 74296465Sdelphij 0x73, 0x56, 0xc0, 0x14, 0xa7, 0x8c, 0xf1, 0xdc, 0x12, 0x75, 0xca, 0x1f, 75296465Sdelphij 0x3b, 0xbe, 0xe4, 0xd1, 0x42, 0x3d, 0xd4, 0x30, 0xa3, 0x3c, 0xb6, 0x26, 76296465Sdelphij 0x6f, 0xbf, 0x0e, 0xda, 0x46, 0x69, 0x07, 0x57, 0x27, 0xf2, 0x1d, 0x9b, 77296465Sdelphij 0xbc, 0x94, 0x43, 0x03, 0xf8, 0x11, 0xc7, 0xf6, 0x90, 0xef, 0x3e, 0xe7, 78296465Sdelphij 0x06, 0xc3, 0xd5, 0x2f, 0xc8, 0x66, 0x1e, 0xd7, 0x08, 0xe8, 0xea, 0xde, 79296465Sdelphij 0x80, 0x52, 0xee, 0xf7, 0x84, 0xaa, 0x72, 0xac, 0x35, 0x4d, 0x6a, 0x2a, 80296465Sdelphij 0x96, 0x1a, 0xd2, 0x71, 0x5a, 0x15, 0x49, 0x74, 0x4b, 0x9f, 0xd0, 0x5e, 81296465Sdelphij 0x04, 0x18, 0xa4, 0xec, 0xc2, 0xe0, 0x41, 0x6e, 0x0f, 0x51, 0xcb, 0xcc, 82296465Sdelphij 0x24, 0x91, 0xaf, 0x50, 0xa1, 0xf4, 0x70, 0x39, 0x99, 0x7c, 0x3a, 0x85, 83296465Sdelphij 0x23, 0xb8, 0xb4, 0x7a, 0xfc, 0x02, 0x36, 0x5b, 0x25, 0x55, 0x97, 0x31, 84296465Sdelphij 0x2d, 0x5d, 0xfa, 0x98, 0xe3, 0x8a, 0x92, 0xae, 0x05, 0xdf, 0x29, 0x10, 85296465Sdelphij 0x67, 0x6c, 0xba, 0xc9, 0xd3, 0x00, 0xe6, 0xcf, 0xe1, 0x9e, 0xa8, 0x2c, 86296465Sdelphij 0x63, 0x16, 0x01, 0x3f, 0x58, 0xe2, 0x89, 0xa9, 0x0d, 0x38, 0x34, 0x1b, 87296465Sdelphij 0xab, 0x33, 0xff, 0xb0, 0xbb, 0x48, 0x0c, 0x5f, 0xb9, 0xb1, 0xcd, 0x2e, 88296465Sdelphij 0xc5, 0xf3, 0xdb, 0x47, 0xe5, 0xa5, 0x9c, 0x77, 0x0a, 0xa6, 0x20, 0x68, 89296465Sdelphij 0xfe, 0x7f, 0xc1, 0xad, 90296465Sdelphij}; 9155714Skris 92160814Ssimon#if defined(_MSC_VER) && defined(_ARM_) 93296465Sdelphij# pragma optimize("g",off) 94160814Ssimon#endif 95160814Ssimon 96296465Sdelphij/* 97296465Sdelphij * It has come to my attention that there are 2 versions of the RC2 key 98296465Sdelphij * schedule. One which is normal, and anther which has a hook to use a 99296465Sdelphij * reduced key length. BSAFE uses the 'retarded' version. What I previously 100296465Sdelphij * shipped is the same as specifying 1024 for the 'bits' parameter. Bsafe 101296465Sdelphij * uses a version where the bits parameter is the same as len*8 102296465Sdelphij */ 103194206Ssimon 104194206Ssimon#ifdef OPENSSL_FIPS 10568651Skrisvoid RC2_set_key(RC2_KEY *key, int len, const unsigned char *data, int bits) 106296465Sdelphij{ 107296465Sdelphij if (FIPS_mode()) 108296465Sdelphij FIPS_BAD_ABORT(RC2) 109296465Sdelphij private_RC2_set_key(key, len, data, bits); 110296465Sdelphij} 111296465Sdelphij 112194206Ssimonvoid private_RC2_set_key(RC2_KEY *key, int len, const unsigned char *data, 113296465Sdelphij int bits) 114194206Ssimon#else 115194206Ssimonvoid RC2_set_key(RC2_KEY *key, int len, const unsigned char *data, int bits) 116194206Ssimon#endif 117296465Sdelphij{ 118296465Sdelphij int i, j; 119296465Sdelphij unsigned char *k; 120296465Sdelphij RC2_INT *ki; 121296465Sdelphij unsigned int c, d; 12255714Skris 123296465Sdelphij k = (unsigned char *)&(key->data[0]); 124296465Sdelphij *k = 0; /* for if there is a zero length key */ 12555714Skris 126296465Sdelphij if (len > 128) 127296465Sdelphij len = 128; 128296465Sdelphij if (bits <= 0) 129296465Sdelphij bits = 1024; 130296465Sdelphij if (bits > 1024) 131296465Sdelphij bits = 1024; 13255714Skris 133296465Sdelphij for (i = 0; i < len; i++) 134296465Sdelphij k[i] = data[i]; 13555714Skris 136296465Sdelphij /* expand table */ 137296465Sdelphij d = k[len - 1]; 138296465Sdelphij j = 0; 139296465Sdelphij for (i = len; i < 128; i++, j++) { 140296465Sdelphij d = key_table[(k[j] + d) & 0xff]; 141296465Sdelphij k[i] = d; 142296465Sdelphij } 14355714Skris 144296465Sdelphij /* hmm.... key reduction to 'bits' bits */ 14555714Skris 146296465Sdelphij j = (bits + 7) >> 3; 147296465Sdelphij i = 128 - j; 148296465Sdelphij c = (0xff >> (-bits & 0x07)); 14955714Skris 150296465Sdelphij d = key_table[k[i] & c]; 151296465Sdelphij k[i] = d; 152296465Sdelphij while (i--) { 153296465Sdelphij d = key_table[k[i + j] ^ d]; 154296465Sdelphij k[i] = d; 155296465Sdelphij } 15655714Skris 157296465Sdelphij /* copy from bytes into RC2_INT's */ 158296465Sdelphij ki = &(key->data[63]); 159296465Sdelphij for (i = 127; i >= 0; i -= 2) 160296465Sdelphij *(ki--) = ((k[i] << 8) | k[i - 1]) & 0xffff; 161296465Sdelphij} 16255714Skris 163160814Ssimon#if defined(_MSC_VER) 164296465Sdelphij# pragma optimize("",on) 165160814Ssimon#endif 166