rc2_skey.c revision 225736
1722Sjoehw/* crypto/rc2/rc2_skey.c */ 2968Sfyuan/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) 3722Sjoehw * All rights reserved. 4722Sjoehw * 5722Sjoehw * This package is an SSL implementation written 6722Sjoehw * by Eric Young (eay@cryptsoft.com). 7722Sjoehw * The implementation was written so as to conform with Netscapes SSL. 8722Sjoehw * 9722Sjoehw * This library is free for commercial and non-commercial use as long as 10722Sjoehw * the following conditions are aheared to. The following conditions 11722Sjoehw * apply to all code found in this distribution, be it the RC4, RSA, 12722Sjoehw * lhash, DES, etc., code; not just the SSL code. The SSL documentation 13722Sjoehw * included with this distribution is covered by the same copyright terms 14722Sjoehw * except that the holder is Tim Hudson (tjh@cryptsoft.com). 15722Sjoehw * 16722Sjoehw * Copyright remains Eric Young's, and as such any Copyright notices in 17722Sjoehw * the code are not to be removed. 18722Sjoehw * If this package is used in a product, Eric Young should be given attribution 19722Sjoehw * as the author of the parts of the library used. 20722Sjoehw * This can be in the form of a textual message at program startup or 21722Sjoehw * in documentation (online or textual) provided with the package. 22722Sjoehw * 23722Sjoehw * Redistribution and use in source and binary forms, with or without 24722Sjoehw * modification, are permitted provided that the following conditions 251087Sfyuan * are met: 26722Sjoehw * 1. Redistributions of source code must retain the copyright 27968Sfyuan * notice, this list of conditions and the following disclaimer. 28722Sjoehw * 2. Redistributions in binary form must reproduce the above copyright 29722Sjoehw * notice, this list of conditions and the following disclaimer in the 30722Sjoehw * documentation and/or other materials provided with the distribution. 31722Sjoehw * 3. All advertising materials mentioning features or use of this software 32722Sjoehw * must display the following acknowledgement: 33722Sjoehw * "This product includes cryptographic software written by 34722Sjoehw * Eric Young (eay@cryptsoft.com)" 35722Sjoehw * The word 'cryptographic' can be left out if the rouines from the library 36722Sjoehw * being used are not cryptographic related :-). 37722Sjoehw * 4. If you include any Windows specific code (or a derivative thereof) from 38968Sfyuan * the apps directory (application code) you must include an acknowledgement: 39722Sjoehw * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" 40722Sjoehw * 41722Sjoehw * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND 42722Sjoehw * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 43722Sjoehw * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 44722Sjoehw * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 45722Sjoehw * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 46722Sjoehw * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 47722Sjoehw * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 48968Sfyuan * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 49722Sjoehw * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 50722Sjoehw * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 51722Sjoehw * SUCH DAMAGE. 52722Sjoehw * 53722Sjoehw * The licence and distribution terms for any publically available version or 54722Sjoehw * derivative of this code cannot be changed. i.e. this code cannot simply be 55722Sjoehw * copied and put under another distribution licence 56722Sjoehw * [including the GNU Public Licence.] 57722Sjoehw */ 58968Sfyuan 59968Sfyuan#include <openssl/rc2.h> 60968Sfyuan#include <openssl/crypto.h> 61968Sfyuan#ifdef OPENSSL_FIPS 62722Sjoehw#include <openssl/fips.h> 63722Sjoehw#endif 64968Sfyuan 65968Sfyuan#include "rc2_locl.h" 66722Sjoehw 67722Sjoehwstatic unsigned char key_table[256]={ 68722Sjoehw 0xd9,0x78,0xf9,0xc4,0x19,0xdd,0xb5,0xed,0x28,0xe9,0xfd,0x79, 69722Sjoehw 0x4a,0xa0,0xd8,0x9d,0xc6,0x7e,0x37,0x83,0x2b,0x76,0x53,0x8e, 70722Sjoehw 0x62,0x4c,0x64,0x88,0x44,0x8b,0xfb,0xa2,0x17,0x9a,0x59,0xf5, 71722Sjoehw 0x87,0xb3,0x4f,0x13,0x61,0x45,0x6d,0x8d,0x09,0x81,0x7d,0x32, 72722Sjoehw 0xbd,0x8f,0x40,0xeb,0x86,0xb7,0x7b,0x0b,0xf0,0x95,0x21,0x22, 73722Sjoehw 0x5c,0x6b,0x4e,0x82,0x54,0xd6,0x65,0x93,0xce,0x60,0xb2,0x1c, 74722Sjoehw 0x73,0x56,0xc0,0x14,0xa7,0x8c,0xf1,0xdc,0x12,0x75,0xca,0x1f, 75722Sjoehw 0x3b,0xbe,0xe4,0xd1,0x42,0x3d,0xd4,0x30,0xa3,0x3c,0xb6,0x26, 76722Sjoehw 0x6f,0xbf,0x0e,0xda,0x46,0x69,0x07,0x57,0x27,0xf2,0x1d,0x9b, 77722Sjoehw 0xbc,0x94,0x43,0x03,0xf8,0x11,0xc7,0xf6,0x90,0xef,0x3e,0xe7, 78722Sjoehw 0x06,0xc3,0xd5,0x2f,0xc8,0x66,0x1e,0xd7,0x08,0xe8,0xea,0xde, 79722Sjoehw 0x80,0x52,0xee,0xf7,0x84,0xaa,0x72,0xac,0x35,0x4d,0x6a,0x2a, 80722Sjoehw 0x96,0x1a,0xd2,0x71,0x5a,0x15,0x49,0x74,0x4b,0x9f,0xd0,0x5e, 81722Sjoehw 0x04,0x18,0xa4,0xec,0xc2,0xe0,0x41,0x6e,0x0f,0x51,0xcb,0xcc, 82722Sjoehw 0x24,0x91,0xaf,0x50,0xa1,0xf4,0x70,0x39,0x99,0x7c,0x3a,0x85, 83722Sjoehw 0x23,0xb8,0xb4,0x7a,0xfc,0x02,0x36,0x5b,0x25,0x55,0x97,0x31, 84722Sjoehw 0x2d,0x5d,0xfa,0x98,0xe3,0x8a,0x92,0xae,0x05,0xdf,0x29,0x10, 85722Sjoehw 0x67,0x6c,0xba,0xc9,0xd3,0x00,0xe6,0xcf,0xe1,0x9e,0xa8,0x2c, 86722Sjoehw 0x63,0x16,0x01,0x3f,0x58,0xe2,0x89,0xa9,0x0d,0x38,0x34,0x1b, 87722Sjoehw 0xab,0x33,0xff,0xb0,0xbb,0x48,0x0c,0x5f,0xb9,0xb1,0xcd,0x2e, 88722Sjoehw 0xc5,0xf3,0xdb,0x47,0xe5,0xa5,0x9c,0x77,0x0a,0xa6,0x20,0x68, 89722Sjoehw 0xfe,0x7f,0xc1,0xad, 90722Sjoehw }; 91722Sjoehw 92722Sjoehw#if defined(_MSC_VER) && defined(_ARM_) 93722Sjoehw#pragma optimize("g",off) 94722Sjoehw#endif 95722Sjoehw 96722Sjoehw/* It has come to my attention that there are 2 versions of the RC2 97722Sjoehw * key schedule. One which is normal, and anther which has a hook to 98722Sjoehw * use a reduced key length. 99722Sjoehw * BSAFE uses the 'retarded' version. What I previously shipped is 100722Sjoehw * the same as specifying 1024 for the 'bits' parameter. Bsafe uses 101722Sjoehw * a version where the bits parameter is the same as len*8 */ 102722Sjoehw 103722Sjoehw#ifdef OPENSSL_FIPS 104722Sjoehwvoid RC2_set_key(RC2_KEY *key, int len, const unsigned char *data, int bits) 105722Sjoehw { 106722Sjoehw if (FIPS_mode()) 107722Sjoehw FIPS_BAD_ABORT(RC2) 108722Sjoehw private_RC2_set_key(key, len, data, bits); 109722Sjoehw } 110722Sjoehwvoid private_RC2_set_key(RC2_KEY *key, int len, const unsigned char *data, 111722Sjoehw int bits) 112722Sjoehw#else 113722Sjoehwvoid RC2_set_key(RC2_KEY *key, int len, const unsigned char *data, int bits) 114722Sjoehw#endif 115722Sjoehw { 116722Sjoehw int i,j; 117722Sjoehw unsigned char *k; 118722Sjoehw RC2_INT *ki; 119722Sjoehw unsigned int c,d; 120722Sjoehw 121722Sjoehw k= (unsigned char *)&(key->data[0]); 122722Sjoehw *k=0; /* for if there is a zero length key */ 123722Sjoehw 124722Sjoehw if (len > 128) len=128; 125722Sjoehw if (bits <= 0) bits=1024; 126722Sjoehw if (bits > 1024) bits=1024; 127722Sjoehw 128722Sjoehw for (i=0; i<len; i++) 129722Sjoehw k[i]=data[i]; 130722Sjoehw 131722Sjoehw /* expand table */ 132722Sjoehw d=k[len-1]; 133722Sjoehw j=0; 134722Sjoehw for (i=len; i < 128; i++,j++) 135722Sjoehw { 136722Sjoehw d=key_table[(k[j]+d)&0xff]; 137722Sjoehw k[i]=d; 138722Sjoehw } 139722Sjoehw 140722Sjoehw /* hmm.... key reduction to 'bits' bits */ 141722Sjoehw 142722Sjoehw j=(bits+7)>>3; 143722Sjoehw i=128-j; 144722Sjoehw c= (0xff>>(-bits & 0x07)); 145722Sjoehw 146722Sjoehw d=key_table[k[i]&c]; 147722Sjoehw k[i]=d; 148722Sjoehw while (i--) 149722Sjoehw { 150722Sjoehw d=key_table[k[i+j]^d]; 151722Sjoehw k[i]=d; 152722Sjoehw } 153722Sjoehw 154722Sjoehw /* copy from bytes into RC2_INT's */ 155722Sjoehw ki= &(key->data[63]); 156722Sjoehw for (i=127; i>=0; i-=2) 157722Sjoehw *(ki--)=((k[i]<<8)|k[i-1])&0xffff; 158722Sjoehw } 159722Sjoehw 160722Sjoehw#if defined(_MSC_VER) 1611087Sfyuan#pragma optimize("",on) 162722Sjoehw#endif 163968Sfyuan