1 /* crypto/rc2/rc2_skey.c */ 2 /* Copyright (C) 1995-1998 Eric Young (eay (at) cryptsoft.com) 3 * All rights reserved. 4 * 5 * This package is an SSL implementation written 6 * by Eric Young (eay (at) cryptsoft.com). 7 * The implementation was written so as to conform with Netscapes SSL. 8 * 9 * This library is free for commercial and non-commercial use as long as 10 * the following conditions are aheared to. The following conditions 11 * apply to all code found in this distribution, be it the RC4, RSA, 12 * lhash, DES, etc., code; not just the SSL code. The SSL documentation 13 * included with this distribution is covered by the same copyright terms 14 * except that the holder is Tim Hudson (tjh (at) cryptsoft.com). 15 * 16 * Copyright remains Eric Young's, and as such any Copyright notices in 17 * the code are not to be removed. 18 * If this package is used in a product, Eric Young should be given attribution 19 * as the author of the parts of the library used. 20 * This can be in the form of a textual message at program startup or 21 * in documentation (online or textual) provided with the package. 22 * 23 * Redistribution and use in source and binary forms, with or without 24 * modification, are permitted provided that the following conditions 25 * are met: 26 * 1. Redistributions of source code must retain the copyright 27 * notice, this list of conditions and the following disclaimer. 28 * 2. Redistributions in binary form must reproduce the above copyright 29 * notice, this list of conditions and the following disclaimer in the 30 * documentation and/or other materials provided with the distribution. 31 * 3. All advertising materials mentioning features or use of this software 32 * must display the following acknowledgement: 33 * "This product includes cryptographic software written by 34 * Eric Young (eay (at) cryptsoft.com)" 35 * The word 'cryptographic' can be left out if the rouines from the library 36 * being used are not cryptographic related :-). 37 * 4. If you include any Windows specific code (or a derivative thereof) from 38 * the apps directory (application code) you must include an acknowledgement: 39 * "This product includes software written by Tim Hudson (tjh (at) cryptsoft.com)" 40 * 41 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND 42 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 43 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 44 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 45 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 46 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 47 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 49 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 50 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 51 * SUCH DAMAGE. 52 * 53 * The licence and distribution terms for any publically available version or 54 * derivative of this code cannot be changed. i.e. this code cannot simply be 55 * copied and put under another distribution licence 56 * [including the GNU Public Licence.] 57 */ 58 59 #include <openssl/rc2.h> 60 #include <openssl/crypto.h> 61 #ifdef OPENSSL_FIPS 62 #include <openssl/fips.h> 63 #endif 64 65 #include "rc2_locl.h" 66 67 static unsigned char key_table[256]={ 68 0xd9,0x78,0xf9,0xc4,0x19,0xdd,0xb5,0xed,0x28,0xe9,0xfd,0x79, 69 0x4a,0xa0,0xd8,0x9d,0xc6,0x7e,0x37,0x83,0x2b,0x76,0x53,0x8e, 70 0x62,0x4c,0x64,0x88,0x44,0x8b,0xfb,0xa2,0x17,0x9a,0x59,0xf5, 71 0x87,0xb3,0x4f,0x13,0x61,0x45,0x6d,0x8d,0x09,0x81,0x7d,0x32, 72 0xbd,0x8f,0x40,0xeb,0x86,0xb7,0x7b,0x0b,0xf0,0x95,0x21,0x22, 73 0x5c,0x6b,0x4e,0x82,0x54,0xd6,0x65,0x93,0xce,0x60,0xb2,0x1c, 74 0x73,0x56,0xc0,0x14,0xa7,0x8c,0xf1,0xdc,0x12,0x75,0xca,0x1f, 75 0x3b,0xbe,0xe4,0xd1,0x42,0x3d,0xd4,0x30,0xa3,0x3c,0xb6,0x26, 76 0x6f,0xbf,0x0e,0xda,0x46,0x69,0x07,0x57,0x27,0xf2,0x1d,0x9b, 77 0xbc,0x94,0x43,0x03,0xf8,0x11,0xc7,0xf6,0x90,0xef,0x3e,0xe7, 78 0x06,0xc3,0xd5,0x2f,0xc8,0x66,0x1e,0xd7,0x08,0xe8,0xea,0xde, 79 0x80,0x52,0xee,0xf7,0x84,0xaa,0x72,0xac,0x35,0x4d,0x6a,0x2a, 80 0x96,0x1a,0xd2,0x71,0x5a,0x15,0x49,0x74,0x4b,0x9f,0xd0,0x5e, 81 0x04,0x18,0xa4,0xec,0xc2,0xe0,0x41,0x6e,0x0f,0x51,0xcb,0xcc, 82 0x24,0x91,0xaf,0x50,0xa1,0xf4,0x70,0x39,0x99,0x7c,0x3a,0x85, 83 0x23,0xb8,0xb4,0x7a,0xfc,0x02,0x36,0x5b,0x25,0x55,0x97,0x31, 84 0x2d,0x5d,0xfa,0x98,0xe3,0x8a,0x92,0xae,0x05,0xdf,0x29,0x10, 85 0x67,0x6c,0xba,0xc9,0xd3,0x00,0xe6,0xcf,0xe1,0x9e,0xa8,0x2c, 86 0x63,0x16,0x01,0x3f,0x58,0xe2,0x89,0xa9,0x0d,0x38,0x34,0x1b, 87 0xab,0x33,0xff,0xb0,0xbb,0x48,0x0c,0x5f,0xb9,0xb1,0xcd,0x2e, 88 0xc5,0xf3,0xdb,0x47,0xe5,0xa5,0x9c,0x77,0x0a,0xa6,0x20,0x68, 89 0xfe,0x7f,0xc1,0xad, 90 }; 91 92 #if defined(_MSC_VER) && defined(_ARM_) 93 #pragma optimize("g",off) 94 #endif 95 96 /* It has come to my attention that there are 2 versions of the RC2 97 * key schedule. One which is normal, and anther which has a hook to 98 * use a reduced key length. 99 * BSAFE uses the 'retarded' version. What I previously shipped is 100 * the same as specifying 1024 for the 'bits' parameter. Bsafe uses 101 * a version where the bits parameter is the same as len*8 */ 102 103 #ifdef OPENSSL_FIPS 104 void RC2_set_key(RC2_KEY *key, int len, const unsigned char *data, int bits) 105 { 106 if (FIPS_mode()) 107 FIPS_BAD_ABORT(RC2) 108 private_RC2_set_key(key, len, data, bits); 109 } 110 void private_RC2_set_key(RC2_KEY *key, int len, const unsigned char *data, 111 int bits) 112 #else 113 void RC2_set_key(RC2_KEY *key, int len, const unsigned char *data, int bits) 114 #endif 115 { 116 int i,j; 117 unsigned char *k; 118 RC2_INT *ki; 119 unsigned int c,d; 120 121 k= (unsigned char *)&(key->data[0]); 122 *k=0; /* for if there is a zero length key */ 123 124 if (len > 128) len=128; 125 if (bits <= 0) bits=1024; 126 if (bits > 1024) bits=1024; 127 128 for (i=0; i<len; i++) 129 k[i]=data[i]; 130 131 /* expand table */ 132 d=k[len-1]; 133 j=0; 134 for (i=len; i < 128; i++,j++) 135 { 136 d=key_table[(k[j]+d)&0xff]; 137 k[i]=d; 138 } 139 140 /* hmm.... key reduction to 'bits' bits */ 141 142 j=(bits+7)>>3; 143 i=128-j; 144 c= (0xff>>(-bits & 0x07)); 145 146 d=key_table[k[i]&c]; 147 k[i]=d; 148 while (i--) 149 { 150 d=key_table[k[i+j]^d]; 151 k[i]=d; 152 } 153 154 /* copy from bytes into RC2_INT's */ 155 ki= &(key->data[63]); 156 for (i=127; i>=0; i-=2) 157 *(ki--)=((k[i]<<8)|k[i-1])&0xffff; 158 } 159 160 #if defined(_MSC_VER) 161 #pragma optimize("",on) 162 #endif 163
