1 /* crypto/bf/bf_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 59 #include <stdio.h> 60 #include <string.h> 61 #include <openssl/blowfish.h> 62 #include "bf_locl.h" 63 #include "bf_pi.h" 64 65 void BF_set_key(BF_KEY *key, int len, const unsigned char *data) 66 { 67 int i; 68 BF_LONG *p,ri,in[2]; 69 const unsigned char *d,*end; 70 71 72 memcpy(key,&bf_init,sizeof(BF_KEY)); 73 p=key->P; 74 75 if (len > ((BF_ROUNDS+2)*4)) len=(BF_ROUNDS+2)*4; 76 77 d=data; 78 end= &(data[len]); 79 for (i=0; i<(BF_ROUNDS+2); i++) 80 { 81 ri= *(d++); 82 if (d >= end) d=data; 83 84 ri<<=8; 85 ri|= *(d++); 86 if (d >= end) d=data; 87 88 ri<<=8; 89 ri|= *(d++); 90 if (d >= end) d=data; 91 92 ri<<=8; 93 ri|= *(d++); 94 if (d >= end) d=data; 95 96 p[i]^=ri; 97 } 98 99 in[0]=0L; 100 in[1]=0L; 101 for (i=0; i<(BF_ROUNDS+2); i+=2) 102 { 103 BF_encrypt(in,key); 104 p[i ]=in[0]; 105 p[i+1]=in[1]; 106 } 107 108 p=key->S; 109 for (i=0; i<4*256; i+=2) 110 { 111 BF_encrypt(in,key); 112 p[i ]=in[0]; 113 p[i+1]=in[1]; 114 } 115 } 116 117