1/* 2 * Copyright (c) 2000-2001,2011,2014 Apple Inc. All Rights Reserved. 3 * 4 * The contents of this file constitute Original Code as defined in and are 5 * subject to the Apple Public Source License Version 1.2 (the 'License'). 6 * You may not use this file except in compliance with the License. Please obtain 7 * a copy of the License at http://www.apple.com/publicsource and read it before 8 * using this file. 9 * 10 * This Original Code and all software distributed under the License are 11 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESS 12 * OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, INCLUDING WITHOUT 13 * LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR 14 * PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. Please see the License for the 15 * specific language governing rights and limitations under the License. 16 */ 17 18 19/* crypto/rc5/rc5_skey.c */ 20/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) 21 * All rights reserved. 22 * 23 * This package is an SSL implementation written 24 * by Eric Young (eay@cryptsoft.com). 25 * The implementation was written so as to conform with Netscapes SSL. 26 * 27 * This library is free for commercial and non-commercial use as long as 28 * the following conditions are aheared to. The following conditions 29 * apply to all code found in this distribution, be it the RC4, RSA, 30 * lhash, DES, etc., code; not just the SSL code. The SSL documentation 31 * included with this distribution is covered by the same copyright terms 32 * except that the holder is Tim Hudson (tjh@cryptsoft.com). 33 * 34 * Copyright remains Eric Young's, and as such any Copyright notices in 35 * the code are not to be removed. 36 * If this package is used in a product, Eric Young should be given attribution 37 * as the author of the parts of the library used. 38 * This can be in the form of a textual message at program startup or 39 * in documentation (online or textual) provided with the package. 40 * 41 * Redistribution and use in source and binary forms, with or without 42 * modification, are permitted provided that the following conditions 43 * are met: 44 * 1. Redistributions of source code must retain the copyright 45 * notice, this list of conditions and the following disclaimer. 46 * 2. Redistributions in binary form must reproduce the above copyright 47 * notice, this list of conditions and the following disclaimer in the 48 * documentation and/or other materials provided with the distribution. 49 * 3. All advertising materials mentioning features or use of this software 50 * must display the following acknowledgement: 51 * "This product includes cryptographic software written by 52 * Eric Young (eay@cryptsoft.com)" 53 * The word 'cryptographic' can be left out if the rouines from the library 54 * being used are not cryptographic related :-). 55 * 4. If you include any Windows specific code (or a derivative thereof) from 56 * the apps directory (application code) you must include an acknowledgement: 57 * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" 58 * 59 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND 60 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 61 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 62 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 63 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 64 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 65 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 66 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 67 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 68 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 69 * SUCH DAMAGE. 70 * 71 * The licence and distribution terms for any publically available version or 72 * derivative of this code cannot be changed. i.e. this code cannot simply be 73 * copied and put under another distribution licence 74 * [including the GNU Public Licence.] 75 */ 76 77#include <openssl/rc5.h> 78#include "rc5_locl.h" 79 80void RC5_32_set_key(RC5_32_KEY *key, int len, unsigned char *data, 81 int rounds) 82 { 83 RC5_32_INT L[64],l,ll,A,B,*S,k; 84 int i,j,m,c,t,ii,jj; 85 86 if ( (rounds != RC5_16_ROUNDS) && 87 (rounds != RC5_12_ROUNDS) && 88 (rounds != RC5_8_ROUNDS)) 89 rounds=RC5_16_ROUNDS; 90 91 key->rounds=rounds; 92 S= &(key->data[0]); 93 j=0; 94 for (i=0; i<=(len-8); i+=8) 95 { 96 c2l(data,l); 97 L[j++]=l; 98 c2l(data,l); 99 L[j++]=l; 100 } 101 ii=len-i; 102 if (ii) 103 { 104 k=len&0x07; 105 c2ln(data,l,ll,k); 106 L[j+0]=l; 107 L[j+1]=ll; 108 } 109 110 c=(len+3)/4; 111 t=(rounds+1)*2; 112 S[0]=RC5_32_P; 113 for (i=1; i<t; i++) 114 S[i]=(S[i-1]+RC5_32_Q)&RC5_32_MASK; 115 116 j=(t>c)?t:c; 117 j*=3; 118 ii=jj=0; 119 A=B=0; 120 for (i=0; i<j; i++) 121 { 122 k=(S[ii]+A+B)&RC5_32_MASK; 123 A=S[ii]=ROTATE_l32(k,3); 124 m=(int)(A+B); 125 k=(L[jj]+A+B)&RC5_32_MASK; 126 B=L[jj]=ROTATE_l32(k,m); 127 if (++ii >= t) ii=0; 128 if (++jj >= c) jj=0; 129 } 130 } 131 132