Alexandre Savard | 1b09e31 | 2012-08-07 20:33:29 -0400 | [diff] [blame] | 1 | /* crypto/rc2/rc2_skey.c */ |
| 2 | /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) |
| 3 | * All rights reserved. |
| 4 | * |
| 5 | * This package is an SSL implementation written |
| 6 | * by Eric Young (eay@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@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@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@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 | |
Alexandre Savard | 1b09e31 | 2012-08-07 20:33:29 -0400 | [diff] [blame] | 59 | #include <openssl/rc2.h> |
| 60 | #include "rc2_locl.h" |
| 61 | |
| 62 | static const unsigned char key_table[256]={ |
| 63 | 0xd9,0x78,0xf9,0xc4,0x19,0xdd,0xb5,0xed,0x28,0xe9,0xfd,0x79, |
| 64 | 0x4a,0xa0,0xd8,0x9d,0xc6,0x7e,0x37,0x83,0x2b,0x76,0x53,0x8e, |
| 65 | 0x62,0x4c,0x64,0x88,0x44,0x8b,0xfb,0xa2,0x17,0x9a,0x59,0xf5, |
| 66 | 0x87,0xb3,0x4f,0x13,0x61,0x45,0x6d,0x8d,0x09,0x81,0x7d,0x32, |
| 67 | 0xbd,0x8f,0x40,0xeb,0x86,0xb7,0x7b,0x0b,0xf0,0x95,0x21,0x22, |
| 68 | 0x5c,0x6b,0x4e,0x82,0x54,0xd6,0x65,0x93,0xce,0x60,0xb2,0x1c, |
| 69 | 0x73,0x56,0xc0,0x14,0xa7,0x8c,0xf1,0xdc,0x12,0x75,0xca,0x1f, |
| 70 | 0x3b,0xbe,0xe4,0xd1,0x42,0x3d,0xd4,0x30,0xa3,0x3c,0xb6,0x26, |
| 71 | 0x6f,0xbf,0x0e,0xda,0x46,0x69,0x07,0x57,0x27,0xf2,0x1d,0x9b, |
| 72 | 0xbc,0x94,0x43,0x03,0xf8,0x11,0xc7,0xf6,0x90,0xef,0x3e,0xe7, |
| 73 | 0x06,0xc3,0xd5,0x2f,0xc8,0x66,0x1e,0xd7,0x08,0xe8,0xea,0xde, |
| 74 | 0x80,0x52,0xee,0xf7,0x84,0xaa,0x72,0xac,0x35,0x4d,0x6a,0x2a, |
| 75 | 0x96,0x1a,0xd2,0x71,0x5a,0x15,0x49,0x74,0x4b,0x9f,0xd0,0x5e, |
| 76 | 0x04,0x18,0xa4,0xec,0xc2,0xe0,0x41,0x6e,0x0f,0x51,0xcb,0xcc, |
| 77 | 0x24,0x91,0xaf,0x50,0xa1,0xf4,0x70,0x39,0x99,0x7c,0x3a,0x85, |
| 78 | 0x23,0xb8,0xb4,0x7a,0xfc,0x02,0x36,0x5b,0x25,0x55,0x97,0x31, |
| 79 | 0x2d,0x5d,0xfa,0x98,0xe3,0x8a,0x92,0xae,0x05,0xdf,0x29,0x10, |
| 80 | 0x67,0x6c,0xba,0xc9,0xd3,0x00,0xe6,0xcf,0xe1,0x9e,0xa8,0x2c, |
| 81 | 0x63,0x16,0x01,0x3f,0x58,0xe2,0x89,0xa9,0x0d,0x38,0x34,0x1b, |
| 82 | 0xab,0x33,0xff,0xb0,0xbb,0x48,0x0c,0x5f,0xb9,0xb1,0xcd,0x2e, |
| 83 | 0xc5,0xf3,0xdb,0x47,0xe5,0xa5,0x9c,0x77,0x0a,0xa6,0x20,0x68, |
| 84 | 0xfe,0x7f,0xc1,0xad, |
| 85 | }; |
| 86 | |
| 87 | #if defined(_MSC_VER) && defined(_ARM_) |
| 88 | #pragma optimize("g",off) |
| 89 | #endif |
| 90 | |
| 91 | /* It has come to my attention that there are 2 versions of the RC2 |
| 92 | * key schedule. One which is normal, and anther which has a hook to |
| 93 | * use a reduced key length. |
| 94 | * BSAFE uses the 'retarded' version. What I previously shipped is |
| 95 | * the same as specifying 1024 for the 'bits' parameter. Bsafe uses |
| 96 | * a version where the bits parameter is the same as len*8 */ |
| 97 | void RC2_set_key(RC2_KEY *key, int len, const unsigned char *data, int bits) |
Alexandre Savard | 1b09e31 | 2012-08-07 20:33:29 -0400 | [diff] [blame] | 98 | { |
| 99 | int i,j; |
| 100 | unsigned char *k; |
| 101 | RC2_INT *ki; |
| 102 | unsigned int c,d; |
| 103 | |
| 104 | k= (unsigned char *)&(key->data[0]); |
| 105 | *k=0; /* for if there is a zero length key */ |
| 106 | |
| 107 | if (len > 128) len=128; |
| 108 | if (bits <= 0) bits=1024; |
| 109 | if (bits > 1024) bits=1024; |
| 110 | |
| 111 | for (i=0; i<len; i++) |
| 112 | k[i]=data[i]; |
| 113 | |
| 114 | /* expand table */ |
| 115 | d=k[len-1]; |
| 116 | j=0; |
| 117 | for (i=len; i < 128; i++,j++) |
| 118 | { |
| 119 | d=key_table[(k[j]+d)&0xff]; |
| 120 | k[i]=d; |
| 121 | } |
| 122 | |
| 123 | /* hmm.... key reduction to 'bits' bits */ |
| 124 | |
| 125 | j=(bits+7)>>3; |
| 126 | i=128-j; |
| 127 | c= (0xff>>(-bits & 0x07)); |
| 128 | |
| 129 | d=key_table[k[i]&c]; |
| 130 | k[i]=d; |
| 131 | while (i--) |
| 132 | { |
| 133 | d=key_table[k[i+j]^d]; |
| 134 | k[i]=d; |
| 135 | } |
| 136 | |
| 137 | /* copy from bytes into RC2_INT's */ |
| 138 | ki= &(key->data[63]); |
| 139 | for (i=127; i>=0; i-=2) |
| 140 | *(ki--)=((k[i]<<8)|k[i-1])&0xffff; |
| 141 | } |
| 142 | |
| 143 | #if defined(_MSC_VER) |
| 144 | #pragma optimize("",on) |
| 145 | #endif |