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/*
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* Copyright (c) 2010, Oracle America, Inc.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are
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* met:
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*
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following
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* disclaimer in the documentation and/or other materials
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* provided with the distribution.
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* * Neither the name of the "Oracle America, Inc." nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
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* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
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* GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#if 0
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#ident "@(#)xcrypt.c 1.11 94/08/23 SMI"
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#endif
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#if !defined(lint) && defined(SCCSIDS)
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static char sccsid[] = "@(#)xcrypt.c 1.3 89/03/24 Copyr 1986 Sun Micro";
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#endif
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/*
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* xcrypt.c: Hex encryption/decryption and utility routines
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*/
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#include <ctype.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <sys/types.h>
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#include <rpc/des_crypt.h>
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#include <shlib-compat.h>
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static const char hex[16] =
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{
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'0', '1', '2', '3', '4', '5', '6', '7',
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'8', '9', 'a', 'b', 'c', 'd', 'e', 'f',
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};
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#ifdef _LIBC
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# define hexval(c) \
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(c >= '0' && c <= '9' \
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? c - '0' \
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: ({ int upp = toupper (c); \
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upp >= 'A' && upp <= 'Z' ? upp - 'A' + 10 : -1; }))
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#else
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static char hexval (char);
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#endif
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static void hex2bin (int, char *, char *);
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static void bin2hex (int, unsigned char *, char *);
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void passwd2des_internal (char *pw, char *key);
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#ifdef _LIBC
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libc_hidden_proto (passwd2des_internal)
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#endif
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/*
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* Turn password into DES key
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*/
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void
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passwd2des_internal (char *pw, char *key)
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{
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int i;
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memset (key, 0, 8);
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for (i = 0; *pw && i < 8; ++i)
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key[i] ^= *pw++ << 1;
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des_setparity (key);
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}
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#ifdef _LIBC
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libc_hidden_def (passwd2des_internal)
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libc_sunrpc_symbol(passwd2des_internal, passwd2des, GLIBC_2_1)
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#else
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void passwd2des (char *pw, char *key)
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{
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return passwd2des_internal (pw, key);
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}
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#endif
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/*
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* Encrypt a secret key given passwd
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* The secret key is passed and returned in hex notation.
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* Its length must be a multiple of 16 hex digits (64 bits).
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*/
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int
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xencrypt (char *secret, char *passwd)
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{
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char key[8];
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char ivec[8];
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char *buf;
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int err;
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int len;
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len = strlen (secret) / 2;
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buf = malloc ((unsigned) len);
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hex2bin (len, secret, buf);
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passwd2des_internal (passwd, key);
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memset (ivec, 0, 8);
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err = cbc_crypt (key, buf, len, DES_ENCRYPT | DES_HW, ivec);
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if (DES_FAILED (err))
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{
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free (buf);
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return 0;
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}
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bin2hex (len, (unsigned char *) buf, secret);
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free (buf);
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return 1;
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}
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libc_hidden_nolink_sunrpc (xencrypt, GLIBC_2_0)
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/*
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* Decrypt secret key using passwd
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* The secret key is passed and returned in hex notation.
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* Once again, the length is a multiple of 16 hex digits
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*/
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int
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xdecrypt (char *secret, char *passwd)
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{
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char key[8];
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char ivec[8];
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char *buf;
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int err;
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int len;
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len = strlen (secret) / 2;
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buf = malloc ((unsigned) len);
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hex2bin (len, secret, buf);
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passwd2des_internal (passwd, key);
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memset (ivec, 0, 8);
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err = cbc_crypt (key, buf, len, DES_DECRYPT | DES_HW, ivec);
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if (DES_FAILED (err))
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{
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free (buf);
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return 0;
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}
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bin2hex (len, (unsigned char *) buf, secret);
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free (buf);
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return 1;
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}
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#ifdef EXPORT_RPC_SYMBOLS
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libc_hidden_def (xdecrypt)
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#else
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libc_hidden_nolink_sunrpc (xdecrypt, GLIBC_2_1)
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#endif
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/*
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* Hex to binary conversion
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*/
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static void
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hex2bin (int len, char *hexnum, char *binnum)
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{
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int i;
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for (i = 0; i < len; i++)
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*binnum++ = 16 * hexval (hexnum[2 * i]) + hexval (hexnum[2 * i + 1]);
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}
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/*
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* Binary to hex conversion
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*/
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static void
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bin2hex (int len, unsigned char *binnum, char *hexnum)
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{
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int i;
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unsigned val;
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for (i = 0; i < len; i++)
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{
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val = binnum[i];
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hexnum[i * 2] = hex[val >> 4];
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hexnum[i * 2 + 1] = hex[val & 0xf];
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}
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hexnum[len * 2] = 0;
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}
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#ifndef _LIBC
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static char
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hexval (char c)
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{
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if (c >= '0' && c <= '9')
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return (c - '0');
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else if (c >= 'a' && c <= 'z')
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return (c - 'a' + 10);
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else if (c >= 'A' && c <= 'Z')
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return (c - 'A' + 10);
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else
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return -1;
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}
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#endif
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