1214571Sdim/* crypto/cast/c_skey.c */ 2214571Sdim/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) 3214571Sdim * All rights reserved. 4214571Sdim * 5214571Sdim * This package is an SSL implementation written 6214571Sdim * by Eric Young (eay@cryptsoft.com). 7214571Sdim * The implementation was written so as to conform with Netscapes SSL. 8214571Sdim * 9214571Sdim * This library is free for commercial and non-commercial use as long as 10214571Sdim * the following conditions are aheared to. The following conditions 11214571Sdim * apply to all code found in this distribution, be it the RC4, RSA, 12214571Sdim * lhash, DES, etc., code; not just the SSL code. The SSL documentation 13214571Sdim * included with this distribution is covered by the same copyright terms 14214571Sdim * except that the holder is Tim Hudson (tjh@cryptsoft.com). 15214571Sdim * 16214571Sdim * Copyright remains Eric Young's, and as such any Copyright notices in 17214571Sdim * the code are not to be removed. 18214571Sdim * If this package is used in a product, Eric Young should be given attribution 19214571Sdim * as the author of the parts of the library used. 20214571Sdim * This can be in the form of a textual message at program startup or 21214571Sdim * in documentation (online or textual) provided with the package. 22214571Sdim * 23214571Sdim * Redistribution and use in source and binary forms, with or without 24214571Sdim * modification, are permitted provided that the following conditions 25214571Sdim * are met: 26214571Sdim * 1. Redistributions of source code must retain the copyright 27214571Sdim * notice, this list of conditions and the following disclaimer. 28214571Sdim * 2. Redistributions in binary form must reproduce the above copyright 29214571Sdim * notice, this list of conditions and the following disclaimer in the 30214571Sdim * documentation and/or other materials provided with the distribution. 31214571Sdim * 3. All advertising materials mentioning features or use of this software 32214571Sdim * must display the following acknowledgement: 33214571Sdim * "This product includes cryptographic software written by 34214571Sdim * Eric Young (eay@cryptsoft.com)" 35214571Sdim * The word 'cryptographic' can be left out if the rouines from the library 36214571Sdim * being used are not cryptographic related :-). 37214571Sdim * 4. If you include any Windows specific code (or a derivative thereof) from 38214571Sdim * the apps directory (application code) you must include an acknowledgement: 39214571Sdim * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" 40214571Sdim * 41214571Sdim * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND 42214571Sdim * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 43214571Sdim * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 44214571Sdim * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 45214571Sdim * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 46214571Sdim * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 47214571Sdim * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 48214571Sdim * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 49214571Sdim * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 50214571Sdim * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 51214571Sdim * SUCH DAMAGE. 52214571Sdim * 53214571Sdim * The licence and distribution terms for any publically available version or 54214571Sdim * derivative of this code cannot be changed. i.e. this code cannot simply be 55214571Sdim * copied and put under another distribution licence 56214571Sdim * [including the GNU Public Licence.] 57214571Sdim */ 58214571Sdim 59214571Sdim#include <openssl/crypto.h> 60214571Sdim#include <openssl/cast.h> 61214571Sdim#include "cast_lcl.h" 62214571Sdim#include "cast_s.h" 63214571Sdim 64214571Sdim#define CAST_exp(l,A,a,n) \ 65214571Sdim A[n/4]=l; \ 66214571Sdim a[n+3]=(l )&0xff; \ 67214571Sdim a[n+2]=(l>> 8)&0xff; \ 68214571Sdim a[n+1]=(l>>16)&0xff; \ 69214571Sdim a[n+0]=(l>>24)&0xff; 70214571Sdim 71214571Sdim#define S4 CAST_S_table4 72214571Sdim#define S5 CAST_S_table5 73214571Sdim#define S6 CAST_S_table6 74214571Sdim#define S7 CAST_S_table7 75214571Sdimvoid CAST_set_key(CAST_KEY *key, int len, const unsigned char *data) 76214571Sdim#ifdef OPENSSL_FIPS 77214571Sdim{ 78214571Sdim fips_cipher_abort(CAST); 79214571Sdim private_CAST_set_key(key, len, data); 80214571Sdim} 81214571Sdim 82214571Sdimvoid private_CAST_set_key(CAST_KEY *key, int len, const unsigned char *data) 83214571Sdim#endif 84214571Sdim{ 85214571Sdim CAST_LONG x[16]; 86214571Sdim CAST_LONG z[16]; 87214571Sdim CAST_LONG k[32]; 88214571Sdim CAST_LONG X[4], Z[4]; 89214571Sdim CAST_LONG l, *K; 90214571Sdim int i; 91214571Sdim 92214571Sdim for (i = 0; i < 16; i++) 93214571Sdim x[i] = 0; 94214571Sdim if (len > 16) 95214571Sdim len = 16; 96214571Sdim for (i = 0; i < len; i++) 97214571Sdim x[i] = data[i]; 98214571Sdim if (len <= 10) 99214571Sdim key->short_key = 1; 100214571Sdim else 101214571Sdim key->short_key = 0; 102214571Sdim 103214571Sdim K = &k[0]; 104214571Sdim X[0] = ((x[0] << 24) | (x[1] << 16) | (x[2] << 8) | x[3]) & 0xffffffffL; 105214571Sdim X[1] = ((x[4] << 24) | (x[5] << 16) | (x[6] << 8) | x[7]) & 0xffffffffL; 106214571Sdim X[2] = ((x[8] << 24) | (x[9] << 16) | (x[10] << 8) | x[11]) & 0xffffffffL; 107214571Sdim X[3] = 108214571Sdim ((x[12] << 24) | (x[13] << 16) | (x[14] << 8) | x[15]) & 0xffffffffL; 109214571Sdim 110214571Sdim for (;;) { 111214571Sdim l = X[0] ^ S4[x[13]] ^ S5[x[15]] ^ S6[x[12]] ^ S7[x[14]] ^ S6[x[8]]; 112214571Sdim CAST_exp(l, Z, z, 0); 113214571Sdim l = X[2] ^ S4[z[0]] ^ S5[z[2]] ^ S6[z[1]] ^ S7[z[3]] ^ S7[x[10]]; 114214571Sdim CAST_exp(l, Z, z, 4); 115214571Sdim l = X[3] ^ S4[z[7]] ^ S5[z[6]] ^ S6[z[5]] ^ S7[z[4]] ^ S4[x[9]]; 116214571Sdim CAST_exp(l, Z, z, 8); 117214571Sdim l = X[1] ^ S4[z[10]] ^ S5[z[9]] ^ S6[z[11]] ^ S7[z[8]] ^ S5[x[11]]; 118214571Sdim CAST_exp(l, Z, z, 12); 119214571Sdim 120214571Sdim K[0] = S4[z[8]] ^ S5[z[9]] ^ S6[z[7]] ^ S7[z[6]] ^ S4[z[2]]; 121214571Sdim K[1] = S4[z[10]] ^ S5[z[11]] ^ S6[z[5]] ^ S7[z[4]] ^ S5[z[6]]; 122214571Sdim K[2] = S4[z[12]] ^ S5[z[13]] ^ S6[z[3]] ^ S7[z[2]] ^ S6[z[9]]; 123214571Sdim K[3] = S4[z[14]] ^ S5[z[15]] ^ S6[z[1]] ^ S7[z[0]] ^ S7[z[12]]; 124214571Sdim 125214571Sdim l = Z[2] ^ S4[z[5]] ^ S5[z[7]] ^ S6[z[4]] ^ S7[z[6]] ^ S6[z[0]]; 126214571Sdim CAST_exp(l, X, x, 0); 127214571Sdim l = Z[0] ^ S4[x[0]] ^ S5[x[2]] ^ S6[x[1]] ^ S7[x[3]] ^ S7[z[2]]; 128214571Sdim CAST_exp(l, X, x, 4); 129214571Sdim l = Z[1] ^ S4[x[7]] ^ S5[x[6]] ^ S6[x[5]] ^ S7[x[4]] ^ S4[z[1]]; 130214571Sdim CAST_exp(l, X, x, 8); 131214571Sdim l = Z[3] ^ S4[x[10]] ^ S5[x[9]] ^ S6[x[11]] ^ S7[x[8]] ^ S5[z[3]]; 132214571Sdim CAST_exp(l, X, x, 12); 133214571Sdim 134214571Sdim K[4] = S4[x[3]] ^ S5[x[2]] ^ S6[x[12]] ^ S7[x[13]] ^ S4[x[8]]; 135214571Sdim K[5] = S4[x[1]] ^ S5[x[0]] ^ S6[x[14]] ^ S7[x[15]] ^ S5[x[13]]; 136214571Sdim K[6] = S4[x[7]] ^ S5[x[6]] ^ S6[x[8]] ^ S7[x[9]] ^ S6[x[3]]; 137214571Sdim K[7] = S4[x[5]] ^ S5[x[4]] ^ S6[x[10]] ^ S7[x[11]] ^ S7[x[7]]; 138214571Sdim 139214571Sdim l = X[0] ^ S4[x[13]] ^ S5[x[15]] ^ S6[x[12]] ^ S7[x[14]] ^ S6[x[8]]; 140214571Sdim CAST_exp(l, Z, z, 0); 141214571Sdim l = X[2] ^ S4[z[0]] ^ S5[z[2]] ^ S6[z[1]] ^ S7[z[3]] ^ S7[x[10]]; 142214571Sdim CAST_exp(l, Z, z, 4); 143214571Sdim l = X[3] ^ S4[z[7]] ^ S5[z[6]] ^ S6[z[5]] ^ S7[z[4]] ^ S4[x[9]]; 144214571Sdim CAST_exp(l, Z, z, 8); 145214571Sdim l = X[1] ^ S4[z[10]] ^ S5[z[9]] ^ S6[z[11]] ^ S7[z[8]] ^ S5[x[11]]; 146214571Sdim CAST_exp(l, Z, z, 12); 147214571Sdim 148214571Sdim K[8] = S4[z[3]] ^ S5[z[2]] ^ S6[z[12]] ^ S7[z[13]] ^ S4[z[9]]; 149214571Sdim K[9] = S4[z[1]] ^ S5[z[0]] ^ S6[z[14]] ^ S7[z[15]] ^ S5[z[12]]; 150214571Sdim K[10] = S4[z[7]] ^ S5[z[6]] ^ S6[z[8]] ^ S7[z[9]] ^ S6[z[2]]; 151214571Sdim K[11] = S4[z[5]] ^ S5[z[4]] ^ S6[z[10]] ^ S7[z[11]] ^ S7[z[6]]; 152214571Sdim 153214571Sdim l = Z[2] ^ S4[z[5]] ^ S5[z[7]] ^ S6[z[4]] ^ S7[z[6]] ^ S6[z[0]]; 154214571Sdim CAST_exp(l, X, x, 0); 155214571Sdim l = Z[0] ^ S4[x[0]] ^ S5[x[2]] ^ S6[x[1]] ^ S7[x[3]] ^ S7[z[2]]; 156214571Sdim CAST_exp(l, X, x, 4); 157214571Sdim l = Z[1] ^ S4[x[7]] ^ S5[x[6]] ^ S6[x[5]] ^ S7[x[4]] ^ S4[z[1]]; 158214571Sdim CAST_exp(l, X, x, 8); 159214571Sdim l = Z[3] ^ S4[x[10]] ^ S5[x[9]] ^ S6[x[11]] ^ S7[x[8]] ^ S5[z[3]]; 160214571Sdim CAST_exp(l, X, x, 12); 161214571Sdim 162214571Sdim K[12] = S4[x[8]] ^ S5[x[9]] ^ S6[x[7]] ^ S7[x[6]] ^ S4[x[3]]; 163214571Sdim K[13] = S4[x[10]] ^ S5[x[11]] ^ S6[x[5]] ^ S7[x[4]] ^ S5[x[7]]; 164214571Sdim K[14] = S4[x[12]] ^ S5[x[13]] ^ S6[x[3]] ^ S7[x[2]] ^ S6[x[8]]; 165214571Sdim K[15] = S4[x[14]] ^ S5[x[15]] ^ S6[x[1]] ^ S7[x[0]] ^ S7[x[13]]; 166214571Sdim if (K != k) 167214571Sdim break; 168214571Sdim K += 16; 169214571Sdim } 170214571Sdim 171214571Sdim for (i = 0; i < 16; i++) { 172214571Sdim key->data[i * 2] = k[i]; 173214571Sdim key->data[i * 2 + 1] = ((k[i + 16]) + 16) & 0x1f; 174214571Sdim } 175214571Sdim} 176214571Sdim