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