/* * Sun RPC is a product of Sun Microsystems, Inc. and is provided for * unrestricted use provided that this legend is included on all tape * media and as a part of the software program in whole or part. Users * may copy or modify Sun RPC without charge, but are not authorized * to license or distribute it to anyone else except as part of a product or * program developed by the user. * * SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE * WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR * PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE. * * Sun RPC is provided with no support and without any obligation on the * part of Sun Microsystems, Inc. to assist in its use, correction, * modification or enhancement. * * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC * OR ANY PART THEREOF. * * In no event will Sun Microsystems, Inc. be liable for any lost revenue * or profits or other special, indirect and consequential damages, even if * Sun has been advised of the possibility of such damages. * * Sun Microsystems, Inc. * 2550 Garcia Avenue * Mountain View, California 94043 */ /* * Copyright (c) 1986-1991 by Sun Microsystems Inc. */ #if 0 #ident "@(#)xcrypt.c 1.11 94/08/23 SMI" #endif #if !defined(lint) && defined(SCCSIDS) static char sccsid[] = "@(#)xcrypt.c 1.3 89/03/24 Copyr 1986 Sun Micro"; #endif /* * xcrypt.c: Hex encryption/decryption and utility routines */ #include <ctype.h> #include <stdio.h> #include <stdlib.h> #include <string.h> #include <sys/types.h> #include <rpc/des_crypt.h> static const char hex[16] = { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'a', 'b', 'c', 'd', 'e', 'f', }; #ifdef _LIBC # define hexval(c) \ (c >= '0' && c <= '9' \ ? c - '0' \ : ({ int upp = toupper (c); \ upp >= 'A' && upp <= 'Z' ? upp - 'A' + 10 : -1; })) #else static char hexval (char) internal_function; #endif static void hex2bin (int, char *, char *) internal_function; static void bin2hex (int, unsigned char *, char *) internal_function; void passwd2des (char *pw, char *key); /* * Encrypt a secret key given passwd * The secret key is passed and returned in hex notation. * Its length must be a multiple of 16 hex digits (64 bits). */ int xencrypt (char *secret, char *passwd) { char key[8]; char ivec[8]; char *buf; int err; int len; len = strlen (secret) / 2; buf = malloc ((unsigned) len); hex2bin (len, secret, buf); passwd2des (passwd, key); memset (ivec, 0, 8); err = cbc_crypt (key, buf, len, DES_ENCRYPT | DES_HW, ivec); if (DES_FAILED (err)) { free (buf); return 0; } bin2hex (len, (unsigned char *) buf, secret); free (buf); return 1; } /* * Decrypt secret key using passwd * The secret key is passed and returned in hex notation. * Once again, the length is a multiple of 16 hex digits */ int xdecrypt (char *secret, char *passwd) { char key[8]; char ivec[8]; char *buf; int err; int len; len = strlen (secret) / 2; buf = malloc ((unsigned) len); hex2bin (len, secret, buf); passwd2des (passwd, key); memset (ivec, 0, 8); err = cbc_crypt (key, buf, len, DES_DECRYPT | DES_HW, ivec); if (DES_FAILED (err)) { free (buf); return 0; } bin2hex (len, (unsigned char *) buf, secret); free (buf); return 1; } /* * Turn password into DES key */ void passwd2des (char *pw, char *key) { int i; memset (key, 0, 8); for (i = 0; *pw && i < 8; ++i) key[i] ^= *pw++ << 1; des_setparity (key); } /* * Hex to binary conversion */ static void internal_function hex2bin (int len, char *hexnum, char *binnum) { int i; for (i = 0; i < len; i++) *binnum++ = 16 * hexval (hexnum[2 * i]) + hexval (hexnum[2 * i + 1]); } /* * Binary to hex conversion */ static void internal_function bin2hex (int len, unsigned char *binnum, char *hexnum) { int i; unsigned val; for (i = 0; i < len; i++) { val = binnum[i]; hexnum[i * 2] = hex[val >> 4]; hexnum[i * 2 + 1] = hex[val & 0xf]; } hexnum[len * 2] = 0; } #ifndef _LIBC static char hexval (char c) { if (c >= '0' && c <= '9') return (c - '0'); else if (c >= 'a' && c <= 'z') return (c - 'a' + 10); else if (c >= 'A' && c <= 'Z') return (c - 'A' + 10); else return -1; } #endif