1 /* 2 * Sun RPC is a product of Sun Microsystems, Inc. and is provided for 3 * unrestricted use provided that this legend is included on all tape 4 * media and as a part of the software program in whole or part. Users 5 * may copy or modify Sun RPC without charge, but are not authorized 6 * to license or distribute it to anyone else except as part of a product or 7 * program developed by the user. 8 * 9 * SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE 10 * WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR 11 * PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE. 12 * 13 * Sun RPC is provided with no support and without any obligation on the 14 * part of Sun Microsystems, Inc. to assist in its use, correction, 15 * modification or enhancement. 16 * 17 * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE 18 * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC 19 * OR ANY PART THEREOF. 20 * 21 * In no event will Sun Microsystems, Inc. be liable for any lost revenue 22 * or profits or other special, indirect and consequential damages, even if 23 * Sun has been advised of the possibility of such damages. 24 * 25 * Sun Microsystems, Inc. 26 * 2550 Garcia Avenue 27 * Mountain View, California 94043 28 * 29 * @(#)des_crypt.c 2.2 88/08/10 4.0 RPCSRC; from 1.13 88/02/08 SMI 30 * $FreeBSD: src/lib/libc/rpc/des_crypt.c,v 1.3 1999/08/28 00:00:38 peter Exp $ 31 * $DragonFly: src/lib/libc/rpc/des_crypt.c,v 1.5 2005/11/13 12:27:04 swildner Exp $ 32 */ 33 /* 34 * des_crypt.c, DES encryption library routines 35 * Copyright (C) 1986, Sun Microsystems, Inc. 36 */ 37 38 #include <sys/types.h> 39 #include <rpc/des_crypt.h> 40 #include <rpc/des.h> 41 42 static int common_crypt ( char *, char *, unsigned, unsigned, struct desparams * ); 43 int (*__des_crypt_LOCAL)() = 0; 44 extern _des_crypt_call ( char *, int, struct desparams * ); 45 /* 46 * Copy 8 bytes 47 */ 48 #define COPY8(src, dst) { \ 49 char *a = (char *) dst; \ 50 char *b = (char *) src; \ 51 *a++ = *b++; *a++ = *b++; *a++ = *b++; *a++ = *b++; \ 52 *a++ = *b++; *a++ = *b++; *a++ = *b++; *a++ = *b++; \ 53 } 54 55 /* 56 * Copy multiple of 8 bytes 57 */ 58 #define DESCOPY(src, dst, len) { \ 59 char *a = (char *) dst; \ 60 char *b = (char *) src; \ 61 int i; \ 62 for (i = (int) len; i > 0; i -= 8) { \ 63 *a++ = *b++; *a++ = *b++; *a++ = *b++; *a++ = *b++; \ 64 *a++ = *b++; *a++ = *b++; *a++ = *b++; *a++ = *b++; \ 65 } \ 66 } 67 68 /* 69 * CBC mode encryption 70 */ 71 int 72 cbc_crypt(char *key, char *buf, unsigned len, unsigned mode, char *ivec) 73 { 74 int err; 75 struct desparams dp; 76 77 #ifdef BROKEN_DES 78 dp.UDES.UDES_buf = buf; 79 dp.des_mode = ECB; 80 #else 81 dp.des_mode = CBC; 82 #endif 83 COPY8(ivec, dp.des_ivec); 84 err = common_crypt(key, buf, len, mode, &dp); 85 COPY8(dp.des_ivec, ivec); 86 return(err); 87 } 88 89 90 /* 91 * ECB mode encryption 92 */ 93 int 94 ecb_crypt(char *key, char *buf, unsigned len, unsigned mode) 95 { 96 struct desparams dp; 97 98 #ifdef BROKEN_DES 99 dp.UDES.UDES_buf = buf; 100 dp.des_mode = CBC; 101 #else 102 dp.des_mode = ECB; 103 #endif 104 return(common_crypt(key, buf, len, mode, &dp)); 105 } 106 107 108 109 /* 110 * Common code to cbc_crypt() & ecb_crypt() 111 */ 112 static int 113 common_crypt(char *key, char *buf, unsigned len, unsigned mode, 114 struct desparams *desp) 115 { 116 int desdev; 117 118 if ((len % 8) != 0 || len > DES_MAXDATA) { 119 return(DESERR_BADPARAM); 120 } 121 desp->des_dir = 122 ((mode & DES_DIRMASK) == DES_ENCRYPT) ? ENCRYPT : DECRYPT; 123 124 desdev = mode & DES_DEVMASK; 125 COPY8(key, desp->des_key); 126 /* 127 * software 128 */ 129 if (__des_crypt_LOCAL != NULL) { 130 if (!__des_crypt_LOCAL(buf, len, desp)) { 131 return (DESERR_HWERROR); 132 } 133 } else { 134 if (!_des_crypt_call(buf, len, desp)) { 135 return (DESERR_HWERROR); 136 } 137 } 138 return(desdev == DES_SW ? DESERR_NONE : DESERR_NOHWDEVICE); 139 } 140