mirror of
https://github.com/apache/cloudstack.git
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170 lines
4.1 KiB
C
170 lines
4.1 KiB
C
// Copyright (C) 1999 AT&T Laboratories Cambridge. All Rights Reserved.
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//
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// This file is part of the VNC system.
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//
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// The VNC system is free software; you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation; either version 2 of the License, or
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// (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program; if not, write to the Free Software
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// Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
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// USA.
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//
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// If the source code for the VNC system is not available from the place whence
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// you received this file, check http://www.uk.research.att.com/vnc or contact
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// the authors on vnc@uk.research.att.com for information on obtaining it.
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/*
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* vncauth.c - Functions for VNC password management and authentication.
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*/
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/*
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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 <sys/stat.h>
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*/
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#include "stdhdrs.h"
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#include "vncauth.h"
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#include "d3des.h"
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/*
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* We use a fixed key to store passwords, since we assume that our local
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* file system is secure but nonetheless don't want to store passwords
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* as plaintext.
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*/
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unsigned char fixedkey[8] = {23,82,107,6,35,78,88,7};
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/*
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* Encrypt CHALLENGESIZE bytes in memory using a password.
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*/
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void
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vncEncryptBytes(unsigned char *bytes, char *passwd)
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{
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unsigned char key[8];
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unsigned int i;
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/* key is simply password padded with nulls */
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for (i = 0; i < 8; i++) {
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if (i < strlen(passwd)) {
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key[i] = passwd[i];
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} else {
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key[i] = 0;
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}
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}
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deskey(key, EN0);
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for (i = 0; i < CHALLENGESIZE; i += 8) {
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des(bytes+i, bytes+i);
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}
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}
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/*
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* Encrypt a password into the specified space.
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* encryptedPasswd will be 8 bytes long - sufficient space
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* should be allocated.
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*/
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void
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vncEncryptPasswd( unsigned char *encryptedPasswd, char *passwd )
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{
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unsigned int i;
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/* pad password with nulls */
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for (i = 0; i < MAXPWLEN; i++) {
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if (i < strlen(passwd)) {
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encryptedPasswd[i] = passwd[i];
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} else {
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encryptedPasswd[i] = 0;
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}
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}
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/* Do encryption in-place - this way we overwrite our copy of the plaintext
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password */
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deskey(fixedkey, EN0);
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des(encryptedPasswd, encryptedPasswd);
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}
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void
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vncEncryptPasswdMs( unsigned char *encryptedPasswd, char *passwd )
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{
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unsigned int i;
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/* pad password with nulls */
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for (i = 0; i < 32; i++) {
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if (i < strlen(passwd)) {
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encryptedPasswd[i] = passwd[i];
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} else {
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encryptedPasswd[i] = 0;
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}
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}
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/* Do encryption in-place - this way we overwrite our copy of the plaintext
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password */
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deskey(fixedkey, EN0);
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des(encryptedPasswd, encryptedPasswd);
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}
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/*
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* Decrypt a password. Returns a pointer to a newly allocated
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* string containing the password or a null pointer if the password could
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* not be retrieved for some reason.
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*/
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char *
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vncDecryptPasswd(const unsigned char *encryptedPasswd)
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{
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unsigned int i;
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unsigned char *passwd = (unsigned char *)malloc(MAXPWLEN+1);
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memcpy(passwd, encryptedPasswd, MAXPWLEN);
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for (i = 0; i < MAXPWLEN; i++) {
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passwd[i] = encryptedPasswd[i];
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}
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deskey(fixedkey, DE1);
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des(passwd, passwd);
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passwd[MAXPWLEN] = 0;
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return (char *)passwd;
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}
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/*
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* marscha@2006
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* Encrypt bytes[length] in memory using key.
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* Key has to be 8 bytes, length a multiple of 8 bytes.
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*/
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void
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vncEncryptBytes2(unsigned char *where, const int length, unsigned char *key) {
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int i, j;
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deskey(key, EN0);
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for (i = 0; i< 8; i++)
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where[i] ^= key[i];
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des(where, where);
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for (i = 8; i < length; i += 8) {
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for (j = 0; j < 8; j++)
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where[i + j] ^= where[i + j - 8];
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des(where + i, where + i);
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}
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}
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