1 /* $KAME: des.h,v 1.8 2001/09/10 04:03:57 itojun Exp $ */ 2 3 /* lib/des/des.h */ 4 /* Copyright (C) 1995-1996 Eric Young (eay@mincom.oz.au) 5 * All rights reserved. 6 * 7 * This file is part of an SSL implementation written 8 * by Eric Young (eay@mincom.oz.au). 9 * The implementation was written so as to conform with Netscapes SSL 10 * specification. This library and applications are 11 * FREE FOR COMMERCIAL AND NON-COMMERCIAL USE 12 * as long as the following conditions are aheared to. 13 * 14 * Copyright remains Eric Young's, and as such any Copyright notices in 15 * the code are not to be removed. If this code is used in a product, 16 * Eric Young should be given attribution as the author of the parts used. 17 * This can be in the form of a textual message at program startup or 18 * in documentation (online or textual) provided with the package. 19 * 20 * Redistribution and use in source and binary forms, with or without 21 * modification, are permitted provided that the following conditions 22 * are met: 23 * 1. Redistributions of source code must retain the copyright 24 * notice, this list of conditions and the following disclaimer. 25 * 2. Redistributions in binary form must reproduce the above copyright 26 * notice, this list of conditions and the following disclaimer in the 27 * documentation and/or other materials provided with the distribution. 28 * 3. All advertising materials mentioning features or use of this software 29 * must display the following acknowledgement: 30 * This product includes software developed by Eric Young (eay@mincom.oz.au) 31 * 32 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND 33 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 34 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 35 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 36 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 37 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 38 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 39 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 40 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 41 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 42 * SUCH DAMAGE. 43 * 44 * The licence and distribution terms for any publically available version or 45 * derivative of this code cannot be changed. i.e. this code cannot simply be 46 * copied and put under another distribution licence 47 * [including the GNU Public Licence.] 48 */ 49 50 #ifndef HEADER_DES_H 51 #define HEADER_DES_H 52 53 #ifdef __cplusplus 54 extern "C" { 55 #endif 56 57 /* must be 32bit quantity */ 58 #define DES_LONG uint32_t 59 60 typedef unsigned char des_cblock[8]; 61 typedef struct des_ks_struct 62 { 63 union { 64 des_cblock cblock; 65 /* make sure things are correct size on machines with 66 * 8 byte longs */ 67 DES_LONG deslong[2]; 68 } ks; 69 int weak_key; 70 } des_key_schedule[16]; 71 72 #define DES_KEY_SZ (sizeof(des_cblock)) 73 #define DES_SCHEDULE_SZ (sizeof(des_key_schedule)) 74 75 #define DES_ENCRYPT 1 76 #define DES_DECRYPT 0 77 78 #define DES_CBC_MODE 0 79 #define DES_PCBC_MODE 1 80 81 extern int des_check_key; /* defaults to false */ 82 83 char *des_options(void); 84 void des_ecb_encrypt(unsigned char *, unsigned char *, des_key_schedule, int); 85 86 void des_encrypt1(DES_LONG *, des_key_schedule, int); 87 void des_encrypt2(DES_LONG *, des_key_schedule, int); 88 void des_encrypt3(DES_LONG *, des_key_schedule, des_key_schedule, 89 des_key_schedule); 90 void des_decrypt3(DES_LONG *, des_key_schedule, des_key_schedule, 91 des_key_schedule); 92 93 void des_ecb3_encrypt(unsigned char *, unsigned char *, des_key_schedule, 94 des_key_schedule, des_key_schedule, int); 95 96 void des_set_odd_parity(unsigned char *); 97 void des_fixup_key_parity(unsigned char *); 98 int des_is_weak_key(const unsigned char *); 99 int des_set_key(const unsigned char *, des_key_schedule); 100 int des_key_sched(const unsigned char *, des_key_schedule); 101 int des_set_key_checked(const unsigned char *, des_key_schedule); 102 void des_set_key_unchecked(const unsigned char *, des_key_schedule); 103 int des_check_key_parity(const unsigned char *); 104 105 #ifdef __cplusplus 106 } 107 #endif 108 109 #endif 110