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 /* 30 * des_crypt.c, DES encryption library routines 31 * Copyright (C) 1986, Sun Microsystems, Inc. 32 */ 33 34 #include <sys/types.h> 35 #include <rpc/des_crypt.h> 36 #include <rpc/des.h> 37 38 #ifndef lint 39 /* from: static char sccsid[] = "@(#)des_crypt.c 2.2 88/08/10 4.0 RPCSRC; from 1.13 88/02/08 SMI"; */ 40 static const char rcsid[] = "$FreeBSD: src/lib/libc/rpc/des_crypt.c,v 1.3 1999/08/28 00:00:38 peter Exp $"; 41 #endif 42 43 static int common_crypt __P(( char *, char *, register unsigned, unsigned, struct desparams * )); 44 int (*__des_crypt_LOCAL)() = 0; 45 extern _des_crypt_call __P(( char *, int, struct desparams * )); 46 /* 47 * Copy 8 bytes 48 */ 49 #define COPY8(src, dst) { \ 50 register char *a = (char *) dst; \ 51 register char *b = (char *) src; \ 52 *a++ = *b++; *a++ = *b++; *a++ = *b++; *a++ = *b++; \ 53 *a++ = *b++; *a++ = *b++; *a++ = *b++; *a++ = *b++; \ 54 } 55 56 /* 57 * Copy multiple of 8 bytes 58 */ 59 #define DESCOPY(src, dst, len) { \ 60 register char *a = (char *) dst; \ 61 register char *b = (char *) src; \ 62 register int i; \ 63 for (i = (int) len; i > 0; i -= 8) { \ 64 *a++ = *b++; *a++ = *b++; *a++ = *b++; *a++ = *b++; \ 65 *a++ = *b++; *a++ = *b++; *a++ = *b++; *a++ = *b++; \ 66 } \ 67 } 68 69 /* 70 * CBC mode encryption 71 */ 72 int 73 cbc_crypt(key, buf, len, mode, ivec) 74 char *key; 75 char *buf; 76 unsigned len; 77 unsigned mode; 78 char *ivec; 79 { 80 int err; 81 struct desparams dp; 82 83 #ifdef BROKEN_DES 84 dp.UDES.UDES_buf = buf; 85 dp.des_mode = ECB; 86 #else 87 dp.des_mode = CBC; 88 #endif 89 COPY8(ivec, dp.des_ivec); 90 err = common_crypt(key, buf, len, mode, &dp); 91 COPY8(dp.des_ivec, ivec); 92 return(err); 93 } 94 95 96 /* 97 * ECB mode encryption 98 */ 99 int 100 ecb_crypt(key, buf, len, mode) 101 char *key; 102 char *buf; 103 unsigned len; 104 unsigned mode; 105 { 106 struct desparams dp; 107 108 #ifdef BROKEN_DES 109 dp.UDES.UDES_buf = buf; 110 dp.des_mode = CBC; 111 #else 112 dp.des_mode = ECB; 113 #endif 114 return(common_crypt(key, buf, len, mode, &dp)); 115 } 116 117 118 119 /* 120 * Common code to cbc_crypt() & ecb_crypt() 121 */ 122 static int 123 common_crypt(key, buf, len, mode, desp) 124 char *key; 125 char *buf; 126 register unsigned len; 127 unsigned mode; 128 register struct desparams *desp; 129 { 130 register int desdev; 131 132 if ((len % 8) != 0 || len > DES_MAXDATA) { 133 return(DESERR_BADPARAM); 134 } 135 desp->des_dir = 136 ((mode & DES_DIRMASK) == DES_ENCRYPT) ? ENCRYPT : DECRYPT; 137 138 desdev = mode & DES_DEVMASK; 139 COPY8(key, desp->des_key); 140 /* 141 * software 142 */ 143 if (__des_crypt_LOCAL != NULL) { 144 if (!__des_crypt_LOCAL(buf, len, desp)) { 145 return (DESERR_HWERROR); 146 } 147 } else { 148 if (!_des_crypt_call(buf, len, desp)) { 149 return (DESERR_HWERROR); 150 } 151 } 152 return(desdev == DES_SW ? DESERR_NONE : DESERR_NOHWDEVICE); 153 } 154