IABSD.fr/xenocara/lib/libICE/src/iceauth.c

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• Author : matthieu
  Date : 2006-11-25 16:45:40
  Hash : 25d3db8c
  Message : import from X.Org 7.2RC2

• lib/libICE/src/iceauth.c

• /* $Xorg: iceauth.c,v 1.4 2001/02/09 02:03:26 xorgcvs Exp $ */
  /******************************************************************************
  
  
  Copyright 1993, 1998  The Open Group
  
  Permission to use, copy, modify, distribute, and sell this software and its
  documentation for any purpose is hereby granted without fee, provided that
  the above copyright notice appear in all copies and that both that
  copyright notice and this permission notice appear in supporting
  documentation.
  
  The above copyright notice and this permission notice shall be included in
  all copies or substantial portions of the Software.
  
  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE
  OPEN GROUP BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
  AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  
  Except as contained in this notice, the name of The Open Group shall not be
  used in advertising or otherwise to promote the sale, use or other dealings
  in this Software without prior written authorization from The Open Group.
  
  Author: Ralph Mor, X Consortium
  ******************************************************************************/
  /* $XFree86: xc/lib/ICE/iceauth.c,v 3.5 2001/12/14 19:53:36 dawes Exp $ */
  
  #ifdef HAVE_CONFIG_H
  #include <config.h>
  #endif
  #include <X11/ICE/ICElib.h>
  #include "ICElibint.h"
  #include <X11/ICE/ICEutil.h>
  
  #include <time.h>
  #define Time_t time_t
  
  static int binaryEqual ();
  
  static int was_called_state;
  
  /*
   * MIT-MAGIC-COOKIE-1 is a sample authentication method implemented by
   * the SI.  It is not part of standard ICElib.
   */
  
  
  char *
  IceGenerateMagicCookie (len)
  
  int len;
  
  {
      char    *auth;
      long    ldata[2];
      int	    seed;
      int	    value;
      int	    i;
      
      if ((auth = (char *) malloc (len + 1)) == NULL)
  	return (NULL);
  
  #ifdef ITIMER_REAL
      {
  	struct timeval  now;
  	X_GETTIMEOFDAY (&now);
  	ldata[0] = now.tv_sec;
  	ldata[1] = now.tv_usec;
      }
  #else
      {
  #ifndef __UNIXOS2__
  	long    time ();
  #endif
  	ldata[0] = time ((long *) 0);
  	ldata[1] = getpid ();
      }
  #endif
      seed = (ldata[0]) + (ldata[1] << 16);
      srand (seed);
      for (i = 0; i < len; i++)
      {
  	value = rand ();
  	auth[i] = value & 0xff;
      }
      auth[len] = '\0';
  
      return (auth);
  }
  
  
  
  IcePoAuthStatus
  _IcePoMagicCookie1Proc (iceConn, authStatePtr, cleanUp, swap,
      authDataLen, authData, replyDataLenRet, replyDataRet, errorStringRet)
  
  IceConn		iceConn;
  IcePointer	*authStatePtr;
  Bool 		cleanUp;
  Bool		swap;
  int     	authDataLen;
  IcePointer	authData;
  int 		*replyDataLenRet;
  IcePointer	*replyDataRet;
  char    	**errorStringRet;
  
  {
      if (cleanUp)
      {
  	/*
  	 * We didn't allocate any state.  We're done.
  	 */
  
  	return (IcePoAuthDoneCleanup);
      }
  
      *errorStringRet = NULL;
  
      if (*authStatePtr == NULL)
      {
  	/*
  	 * This is the first time we're being called.  Search the
  	 * authentication data for the first occurence of
  	 * MIT-MAGIC-COOKIE-1 that matches iceConn->connection_string.
  	 */
  
  	unsigned short  length;
  	char		*data;
  
  	_IceGetPoAuthData ("ICE", iceConn->connection_string,
  	    "MIT-MAGIC-COOKIE-1", &length, &data);
  
  	if (!data)
  	{
  	    char *tempstr =
  		"Could not find correct MIT-MAGIC-COOKIE-1 authentication";
  
  	    *errorStringRet = (char *) malloc (strlen (tempstr) + 1);
  	    if (*errorStringRet)
  		strcpy (*errorStringRet, tempstr);
  
  	    return (IcePoAuthFailed);
  	}
  	else
  	{
  	    *authStatePtr = (IcePointer) &was_called_state;
  
  	    *replyDataLenRet = length;
  	    *replyDataRet = data;
  
  	    return (IcePoAuthHaveReply);
  	}
      }
      else
      {
  	/*
  	 * We should never get here for MIT-MAGIC-COOKIE-1 since it is
  	 * a single pass authentication method.
  	 */
  
  	char *tempstr = "MIT-MAGIC-COOKIE-1 authentication internal error";
  
  	*errorStringRet = (char *) malloc (strlen (tempstr) + 1);
  	if (*errorStringRet)
  	    strcpy (*errorStringRet, tempstr);
  
  	return (IcePoAuthFailed);
      }
  }
  
  
  
  IcePaAuthStatus
  _IcePaMagicCookie1Proc (iceConn, authStatePtr, swap,
      authDataLen, authData, replyDataLenRet, replyDataRet, errorStringRet)
  
  IceConn		iceConn;
  IcePointer	*authStatePtr;
  Bool		swap;
  int     	authDataLen;
  IcePointer	authData;
  int 		*replyDataLenRet;
  IcePointer	*replyDataRet;
  char    	**errorStringRet;
  
  {
      *errorStringRet = NULL;
      *replyDataLenRet = 0;
      *replyDataRet = NULL;
  
      if (*authStatePtr == NULL)
      {
  	/*
  	 * This is the first time we're being called.  We don't have
  	 * any data to pass to the other client.
  	 */
  
  	*authStatePtr = (IcePointer) &was_called_state;
  
  	return (IcePaAuthContinue);
      }
      else
      {
  	/*
  	 * Search the authentication data for the first occurence of
  	 * MIT-MAGIC-COOKIE-1 that matches iceConn->connection_string.
  	 */
  
  	unsigned short  length;
  	char		*data;
  
  	_IceGetPaAuthData ("ICE", iceConn->connection_string,
  	    "MIT-MAGIC-COOKIE-1", &length, &data);
  
  	if (data)
  	{
  	    IcePaAuthStatus stat;
  
  	    if (authDataLen == length &&
  	        binaryEqual ((char *) authData, data, authDataLen))
  	    {
  		stat = IcePaAuthAccepted;
  	    }
  	    else
  	    {
  		char *tempstr = "MIT-MAGIC-COOKIE-1 authentication rejected";
  
  		*errorStringRet = (char *) malloc (strlen (tempstr) + 1);
  		if (*errorStringRet)
  		    strcpy (*errorStringRet, tempstr);
  
  		stat = IcePaAuthRejected;
  	    }
  
  	    free (data);
  	    return (stat);
  	}
  	else
  	{
  	    /*
  	     * We should never get here because in the ConnectionReply
  	     * we should have passed all the valid methods.  So we should
  	     * always find a valid entry.
  	     */
  
  	    char *tempstr =
  		"MIT-MAGIC-COOKIE-1 authentication internal error";
  
  	    *errorStringRet = (char *) malloc (strlen (tempstr) + 1);
  	    if (*errorStringRet)
  		strcpy (*errorStringRet, tempstr);
  
  	    return (IcePaAuthFailed);
  	}
      }
  }
  
  
  
  /*
   * local routines
   */
  
  static int
  binaryEqual (a, b, len)
  
  register char		*a, *b;
  register unsigned	len;
  
  {
      while (len--)
  	if (*a++ != *b++)
  	    return 0;
      return 1;
  }