1*0Sstevel@tonic-gate /* crypto/des/str2key.c */ 2*0Sstevel@tonic-gate /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) 3*0Sstevel@tonic-gate * All rights reserved. 4*0Sstevel@tonic-gate * 5*0Sstevel@tonic-gate * This package is an SSL implementation written 6*0Sstevel@tonic-gate * by Eric Young (eay@cryptsoft.com). 7*0Sstevel@tonic-gate * The implementation was written so as to conform with Netscapes SSL. 8*0Sstevel@tonic-gate * 9*0Sstevel@tonic-gate * This library is free for commercial and non-commercial use as long as 10*0Sstevel@tonic-gate * the following conditions are aheared to. The following conditions 11*0Sstevel@tonic-gate * apply to all code found in this distribution, be it the RC4, RSA, 12*0Sstevel@tonic-gate * lhash, DES, etc., code; not just the SSL code. The SSL documentation 13*0Sstevel@tonic-gate * included with this distribution is covered by the same copyright terms 14*0Sstevel@tonic-gate * except that the holder is Tim Hudson (tjh@cryptsoft.com). 15*0Sstevel@tonic-gate * 16*0Sstevel@tonic-gate * Copyright remains Eric Young's, and as such any Copyright notices in 17*0Sstevel@tonic-gate * the code are not to be removed. 18*0Sstevel@tonic-gate * If this package is used in a product, Eric Young should be given attribution 19*0Sstevel@tonic-gate * as the author of the parts of the library used. 20*0Sstevel@tonic-gate * This can be in the form of a textual message at program startup or 21*0Sstevel@tonic-gate * in documentation (online or textual) provided with the package. 22*0Sstevel@tonic-gate * 23*0Sstevel@tonic-gate * Redistribution and use in source and binary forms, with or without 24*0Sstevel@tonic-gate * modification, are permitted provided that the following conditions 25*0Sstevel@tonic-gate * are met: 26*0Sstevel@tonic-gate * 1. Redistributions of source code must retain the copyright 27*0Sstevel@tonic-gate * notice, this list of conditions and the following disclaimer. 28*0Sstevel@tonic-gate * 2. Redistributions in binary form must reproduce the above copyright 29*0Sstevel@tonic-gate * notice, this list of conditions and the following disclaimer in the 30*0Sstevel@tonic-gate * documentation and/or other materials provided with the distribution. 31*0Sstevel@tonic-gate * 3. All advertising materials mentioning features or use of this software 32*0Sstevel@tonic-gate * must display the following acknowledgement: 33*0Sstevel@tonic-gate * "This product includes cryptographic software written by 34*0Sstevel@tonic-gate * Eric Young (eay@cryptsoft.com)" 35*0Sstevel@tonic-gate * The word 'cryptographic' can be left out if the rouines from the library 36*0Sstevel@tonic-gate * being used are not cryptographic related :-). 37*0Sstevel@tonic-gate * 4. If you include any Windows specific code (or a derivative thereof) from 38*0Sstevel@tonic-gate * the apps directory (application code) you must include an acknowledgement: 39*0Sstevel@tonic-gate * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" 40*0Sstevel@tonic-gate * 41*0Sstevel@tonic-gate * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND 42*0Sstevel@tonic-gate * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 43*0Sstevel@tonic-gate * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 44*0Sstevel@tonic-gate * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 45*0Sstevel@tonic-gate * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 46*0Sstevel@tonic-gate * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 47*0Sstevel@tonic-gate * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 48*0Sstevel@tonic-gate * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 49*0Sstevel@tonic-gate * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 50*0Sstevel@tonic-gate * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 51*0Sstevel@tonic-gate * SUCH DAMAGE. 52*0Sstevel@tonic-gate * 53*0Sstevel@tonic-gate * The licence and distribution terms for any publically available version or 54*0Sstevel@tonic-gate * derivative of this code cannot be changed. i.e. this code cannot simply be 55*0Sstevel@tonic-gate * copied and put under another distribution licence 56*0Sstevel@tonic-gate * [including the GNU Public Licence.] 57*0Sstevel@tonic-gate */ 58*0Sstevel@tonic-gate 59*0Sstevel@tonic-gate #include "des_locl.h" 60*0Sstevel@tonic-gate 61*0Sstevel@tonic-gate void DES_string_to_key(const char *str, DES_cblock *key) 62*0Sstevel@tonic-gate { 63*0Sstevel@tonic-gate DES_key_schedule ks; 64*0Sstevel@tonic-gate int i,length; 65*0Sstevel@tonic-gate register unsigned char j; 66*0Sstevel@tonic-gate 67*0Sstevel@tonic-gate memset(key,0,8); 68*0Sstevel@tonic-gate length=strlen(str); 69*0Sstevel@tonic-gate #ifdef OLD_STR_TO_KEY 70*0Sstevel@tonic-gate for (i=0; i<length; i++) 71*0Sstevel@tonic-gate (*key)[i%8]^=(str[i]<<1); 72*0Sstevel@tonic-gate #else /* MIT COMPATIBLE */ 73*0Sstevel@tonic-gate for (i=0; i<length; i++) 74*0Sstevel@tonic-gate { 75*0Sstevel@tonic-gate j=str[i]; 76*0Sstevel@tonic-gate if ((i%16) < 8) 77*0Sstevel@tonic-gate (*key)[i%8]^=(j<<1); 78*0Sstevel@tonic-gate else 79*0Sstevel@tonic-gate { 80*0Sstevel@tonic-gate /* Reverse the bit order 05/05/92 eay */ 81*0Sstevel@tonic-gate j=((j<<4)&0xf0)|((j>>4)&0x0f); 82*0Sstevel@tonic-gate j=((j<<2)&0xcc)|((j>>2)&0x33); 83*0Sstevel@tonic-gate j=((j<<1)&0xaa)|((j>>1)&0x55); 84*0Sstevel@tonic-gate (*key)[7-(i%8)]^=j; 85*0Sstevel@tonic-gate } 86*0Sstevel@tonic-gate } 87*0Sstevel@tonic-gate #endif 88*0Sstevel@tonic-gate DES_set_odd_parity(key); 89*0Sstevel@tonic-gate #ifdef EXPERIMENTAL_STR_TO_STRONG_KEY 90*0Sstevel@tonic-gate if(DES_is_weak_key(key)) 91*0Sstevel@tonic-gate (*key)[7] ^= 0xF0; 92*0Sstevel@tonic-gate DES_set_key(key,&ks); 93*0Sstevel@tonic-gate #else 94*0Sstevel@tonic-gate DES_set_key_unchecked(key,&ks); 95*0Sstevel@tonic-gate #endif 96*0Sstevel@tonic-gate DES_cbc_cksum((const unsigned char*)str,key,length,&ks,key); 97*0Sstevel@tonic-gate OPENSSL_cleanse(&ks,sizeof(ks)); 98*0Sstevel@tonic-gate DES_set_odd_parity(key); 99*0Sstevel@tonic-gate } 100*0Sstevel@tonic-gate 101*0Sstevel@tonic-gate void DES_string_to_2keys(const char *str, DES_cblock *key1, DES_cblock *key2) 102*0Sstevel@tonic-gate { 103*0Sstevel@tonic-gate DES_key_schedule ks; 104*0Sstevel@tonic-gate int i,length; 105*0Sstevel@tonic-gate register unsigned char j; 106*0Sstevel@tonic-gate 107*0Sstevel@tonic-gate memset(key1,0,8); 108*0Sstevel@tonic-gate memset(key2,0,8); 109*0Sstevel@tonic-gate length=strlen(str); 110*0Sstevel@tonic-gate #ifdef OLD_STR_TO_KEY 111*0Sstevel@tonic-gate if (length <= 8) 112*0Sstevel@tonic-gate { 113*0Sstevel@tonic-gate for (i=0; i<length; i++) 114*0Sstevel@tonic-gate { 115*0Sstevel@tonic-gate (*key2)[i]=(*key1)[i]=(str[i]<<1); 116*0Sstevel@tonic-gate } 117*0Sstevel@tonic-gate } 118*0Sstevel@tonic-gate else 119*0Sstevel@tonic-gate { 120*0Sstevel@tonic-gate for (i=0; i<length; i++) 121*0Sstevel@tonic-gate { 122*0Sstevel@tonic-gate if ((i/8)&1) 123*0Sstevel@tonic-gate (*key2)[i%8]^=(str[i]<<1); 124*0Sstevel@tonic-gate else 125*0Sstevel@tonic-gate (*key1)[i%8]^=(str[i]<<1); 126*0Sstevel@tonic-gate } 127*0Sstevel@tonic-gate } 128*0Sstevel@tonic-gate #else /* MIT COMPATIBLE */ 129*0Sstevel@tonic-gate for (i=0; i<length; i++) 130*0Sstevel@tonic-gate { 131*0Sstevel@tonic-gate j=str[i]; 132*0Sstevel@tonic-gate if ((i%32) < 16) 133*0Sstevel@tonic-gate { 134*0Sstevel@tonic-gate if ((i%16) < 8) 135*0Sstevel@tonic-gate (*key1)[i%8]^=(j<<1); 136*0Sstevel@tonic-gate else 137*0Sstevel@tonic-gate (*key2)[i%8]^=(j<<1); 138*0Sstevel@tonic-gate } 139*0Sstevel@tonic-gate else 140*0Sstevel@tonic-gate { 141*0Sstevel@tonic-gate j=((j<<4)&0xf0)|((j>>4)&0x0f); 142*0Sstevel@tonic-gate j=((j<<2)&0xcc)|((j>>2)&0x33); 143*0Sstevel@tonic-gate j=((j<<1)&0xaa)|((j>>1)&0x55); 144*0Sstevel@tonic-gate if ((i%16) < 8) 145*0Sstevel@tonic-gate (*key1)[7-(i%8)]^=j; 146*0Sstevel@tonic-gate else 147*0Sstevel@tonic-gate (*key2)[7-(i%8)]^=j; 148*0Sstevel@tonic-gate } 149*0Sstevel@tonic-gate } 150*0Sstevel@tonic-gate if (length <= 8) memcpy(key2,key1,8); 151*0Sstevel@tonic-gate #endif 152*0Sstevel@tonic-gate DES_set_odd_parity(key1); 153*0Sstevel@tonic-gate DES_set_odd_parity(key2); 154*0Sstevel@tonic-gate #ifdef EXPERIMENTAL_STR_TO_STRONG_KEY 155*0Sstevel@tonic-gate if(DES_is_weak_key(key1)) 156*0Sstevel@tonic-gate (*key1)[7] ^= 0xF0; 157*0Sstevel@tonic-gate DES_set_key(key1,&ks); 158*0Sstevel@tonic-gate #else 159*0Sstevel@tonic-gate DES_set_key_unchecked(key1,&ks); 160*0Sstevel@tonic-gate #endif 161*0Sstevel@tonic-gate DES_cbc_cksum((const unsigned char*)str,key1,length,&ks,key1); 162*0Sstevel@tonic-gate #ifdef EXPERIMENTAL_STR_TO_STRONG_KEY 163*0Sstevel@tonic-gate if(DES_is_weak_key(key2)) 164*0Sstevel@tonic-gate (*key2)[7] ^= 0xF0; 165*0Sstevel@tonic-gate DES_set_key(key2,&ks); 166*0Sstevel@tonic-gate #else 167*0Sstevel@tonic-gate DES_set_key_unchecked(key2,&ks); 168*0Sstevel@tonic-gate #endif 169*0Sstevel@tonic-gate DES_cbc_cksum((const unsigned char*)str,key2,length,&ks,key2); 170*0Sstevel@tonic-gate OPENSSL_cleanse(&ks,sizeof(ks)); 171*0Sstevel@tonic-gate DES_set_odd_parity(key1); 172*0Sstevel@tonic-gate DES_set_odd_parity(key2); 173*0Sstevel@tonic-gate } 174