155714Skris/* crypto/cast/c_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. 8296341Sdelphij * 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). 15296341Sdelphij * 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. 22296341Sdelphij * 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 :-). 37296341Sdelphij * 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)" 40296341Sdelphij * 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. 52296341Sdelphij * 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 59238405Sjkim#include <openssl/crypto.h> 6055714Skris#include <openssl/cast.h> 6155714Skris#include "cast_lcl.h" 6255714Skris#include "cast_s.h" 6355714Skris 6455714Skris#define CAST_exp(l,A,a,n) \ 65296341Sdelphij A[n/4]=l; \ 66296341Sdelphij a[n+3]=(l )&0xff; \ 67296341Sdelphij a[n+2]=(l>> 8)&0xff; \ 68296341Sdelphij a[n+1]=(l>>16)&0xff; \ 69296341Sdelphij a[n+0]=(l>>24)&0xff; 7055714Skris 7155714Skris#define S4 CAST_S_table4 7255714Skris#define S5 CAST_S_table5 7355714Skris#define S6 CAST_S_table6 7455714Skris#define S7 CAST_S_table7 75238405Sjkimvoid CAST_set_key(CAST_KEY *key, int len, const unsigned char *data) 76238405Sjkim#ifdef OPENSSL_FIPS 77296341Sdelphij{ 78296341Sdelphij fips_cipher_abort(CAST); 79296341Sdelphij private_CAST_set_key(key, len, data); 80296341Sdelphij} 81296341Sdelphij 82238405Sjkimvoid private_CAST_set_key(CAST_KEY *key, int len, const unsigned char *data) 83238405Sjkim#endif 84296341Sdelphij{ 85296341Sdelphij CAST_LONG x[16]; 86296341Sdelphij CAST_LONG z[16]; 87296341Sdelphij CAST_LONG k[32]; 88296341Sdelphij CAST_LONG X[4], Z[4]; 89296341Sdelphij CAST_LONG l, *K; 90296341Sdelphij int i; 9155714Skris 92296341Sdelphij for (i = 0; i < 16; i++) 93296341Sdelphij x[i] = 0; 94296341Sdelphij if (len > 16) 95296341Sdelphij len = 16; 96296341Sdelphij for (i = 0; i < len; i++) 97296341Sdelphij x[i] = data[i]; 98296341Sdelphij if (len <= 10) 99296341Sdelphij key->short_key = 1; 100296341Sdelphij else 101296341Sdelphij key->short_key = 0; 10255714Skris 103296341Sdelphij K = &k[0]; 104296341Sdelphij X[0] = ((x[0] << 24) | (x[1] << 16) | (x[2] << 8) | x[3]) & 0xffffffffL; 105296341Sdelphij X[1] = ((x[4] << 24) | (x[5] << 16) | (x[6] << 8) | x[7]) & 0xffffffffL; 106296341Sdelphij X[2] = ((x[8] << 24) | (x[9] << 16) | (x[10] << 8) | x[11]) & 0xffffffffL; 107296341Sdelphij X[3] = 108296341Sdelphij ((x[12] << 24) | (x[13] << 16) | (x[14] << 8) | x[15]) & 0xffffffffL; 10955714Skris 110296341Sdelphij for (;;) { 111296341Sdelphij l = X[0] ^ S4[x[13]] ^ S5[x[15]] ^ S6[x[12]] ^ S7[x[14]] ^ S6[x[8]]; 112296341Sdelphij CAST_exp(l, Z, z, 0); 113296341Sdelphij l = X[2] ^ S4[z[0]] ^ S5[z[2]] ^ S6[z[1]] ^ S7[z[3]] ^ S7[x[10]]; 114296341Sdelphij CAST_exp(l, Z, z, 4); 115296341Sdelphij l = X[3] ^ S4[z[7]] ^ S5[z[6]] ^ S6[z[5]] ^ S7[z[4]] ^ S4[x[9]]; 116296341Sdelphij CAST_exp(l, Z, z, 8); 117296341Sdelphij l = X[1] ^ S4[z[10]] ^ S5[z[9]] ^ S6[z[11]] ^ S7[z[8]] ^ S5[x[11]]; 118296341Sdelphij CAST_exp(l, Z, z, 12); 11955714Skris 120296341Sdelphij K[0] = S4[z[8]] ^ S5[z[9]] ^ S6[z[7]] ^ S7[z[6]] ^ S4[z[2]]; 121296341Sdelphij K[1] = S4[z[10]] ^ S5[z[11]] ^ S6[z[5]] ^ S7[z[4]] ^ S5[z[6]]; 122296341Sdelphij K[2] = S4[z[12]] ^ S5[z[13]] ^ S6[z[3]] ^ S7[z[2]] ^ S6[z[9]]; 123296341Sdelphij K[3] = S4[z[14]] ^ S5[z[15]] ^ S6[z[1]] ^ S7[z[0]] ^ S7[z[12]]; 12455714Skris 125296341Sdelphij l = Z[2] ^ S4[z[5]] ^ S5[z[7]] ^ S6[z[4]] ^ S7[z[6]] ^ S6[z[0]]; 126296341Sdelphij CAST_exp(l, X, x, 0); 127296341Sdelphij l = Z[0] ^ S4[x[0]] ^ S5[x[2]] ^ S6[x[1]] ^ S7[x[3]] ^ S7[z[2]]; 128296341Sdelphij CAST_exp(l, X, x, 4); 129296341Sdelphij l = Z[1] ^ S4[x[7]] ^ S5[x[6]] ^ S6[x[5]] ^ S7[x[4]] ^ S4[z[1]]; 130296341Sdelphij CAST_exp(l, X, x, 8); 131296341Sdelphij l = Z[3] ^ S4[x[10]] ^ S5[x[9]] ^ S6[x[11]] ^ S7[x[8]] ^ S5[z[3]]; 132296341Sdelphij CAST_exp(l, X, x, 12); 13355714Skris 134296341Sdelphij K[4] = S4[x[3]] ^ S5[x[2]] ^ S6[x[12]] ^ S7[x[13]] ^ S4[x[8]]; 135296341Sdelphij K[5] = S4[x[1]] ^ S5[x[0]] ^ S6[x[14]] ^ S7[x[15]] ^ S5[x[13]]; 136296341Sdelphij K[6] = S4[x[7]] ^ S5[x[6]] ^ S6[x[8]] ^ S7[x[9]] ^ S6[x[3]]; 137296341Sdelphij K[7] = S4[x[5]] ^ S5[x[4]] ^ S6[x[10]] ^ S7[x[11]] ^ S7[x[7]]; 13855714Skris 139296341Sdelphij l = X[0] ^ S4[x[13]] ^ S5[x[15]] ^ S6[x[12]] ^ S7[x[14]] ^ S6[x[8]]; 140296341Sdelphij CAST_exp(l, Z, z, 0); 141296341Sdelphij l = X[2] ^ S4[z[0]] ^ S5[z[2]] ^ S6[z[1]] ^ S7[z[3]] ^ S7[x[10]]; 142296341Sdelphij CAST_exp(l, Z, z, 4); 143296341Sdelphij l = X[3] ^ S4[z[7]] ^ S5[z[6]] ^ S6[z[5]] ^ S7[z[4]] ^ S4[x[9]]; 144296341Sdelphij CAST_exp(l, Z, z, 8); 145296341Sdelphij l = X[1] ^ S4[z[10]] ^ S5[z[9]] ^ S6[z[11]] ^ S7[z[8]] ^ S5[x[11]]; 146296341Sdelphij CAST_exp(l, Z, z, 12); 14755714Skris 148296341Sdelphij K[8] = S4[z[3]] ^ S5[z[2]] ^ S6[z[12]] ^ S7[z[13]] ^ S4[z[9]]; 149296341Sdelphij K[9] = S4[z[1]] ^ S5[z[0]] ^ S6[z[14]] ^ S7[z[15]] ^ S5[z[12]]; 150296341Sdelphij K[10] = S4[z[7]] ^ S5[z[6]] ^ S6[z[8]] ^ S7[z[9]] ^ S6[z[2]]; 151296341Sdelphij K[11] = S4[z[5]] ^ S5[z[4]] ^ S6[z[10]] ^ S7[z[11]] ^ S7[z[6]]; 15255714Skris 153296341Sdelphij l = Z[2] ^ S4[z[5]] ^ S5[z[7]] ^ S6[z[4]] ^ S7[z[6]] ^ S6[z[0]]; 154296341Sdelphij CAST_exp(l, X, x, 0); 155296341Sdelphij l = Z[0] ^ S4[x[0]] ^ S5[x[2]] ^ S6[x[1]] ^ S7[x[3]] ^ S7[z[2]]; 156296341Sdelphij CAST_exp(l, X, x, 4); 157296341Sdelphij l = Z[1] ^ S4[x[7]] ^ S5[x[6]] ^ S6[x[5]] ^ S7[x[4]] ^ S4[z[1]]; 158296341Sdelphij CAST_exp(l, X, x, 8); 159296341Sdelphij l = Z[3] ^ S4[x[10]] ^ S5[x[9]] ^ S6[x[11]] ^ S7[x[8]] ^ S5[z[3]]; 160296341Sdelphij CAST_exp(l, X, x, 12); 16155714Skris 162296341Sdelphij K[12] = S4[x[8]] ^ S5[x[9]] ^ S6[x[7]] ^ S7[x[6]] ^ S4[x[3]]; 163296341Sdelphij K[13] = S4[x[10]] ^ S5[x[11]] ^ S6[x[5]] ^ S7[x[4]] ^ S5[x[7]]; 164296341Sdelphij K[14] = S4[x[12]] ^ S5[x[13]] ^ S6[x[3]] ^ S7[x[2]] ^ S6[x[8]]; 165296341Sdelphij K[15] = S4[x[14]] ^ S5[x[15]] ^ S6[x[1]] ^ S7[x[0]] ^ S7[x[13]]; 166296341Sdelphij if (K != k) 167296341Sdelphij break; 168296341Sdelphij K += 16; 169296341Sdelphij } 17055714Skris 171296341Sdelphij for (i = 0; i < 16; i++) { 172296341Sdelphij key->data[i * 2] = k[i]; 173296341Sdelphij key->data[i * 2 + 1] = ((k[i + 16]) + 16) & 0x1f; 174296341Sdelphij } 175296341Sdelphij} 176