IABSD.fr/xenocara/xserver/os/rpcauth.c

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• Author : matthieu
  Date : 2006-11-28 20:29:31
  Hash : c155af5f
  Message : OpenBSD local modifications: - privilege separation - some snprintf/strlc{at,py} conversions - support for more architectures - signal handler fixes - default mouse wheel support in config tools - sunmouse protocol

• xserver/os/rpcauth.c

• /*
  
  Copyright 1991, 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.
  
  */
  
  /*
   * SUN-DES-1 authentication mechanism
   * Author:  Mayank Choudhary, Sun Microsystems
   */
  
  
  #ifdef HAVE_DIX_CONFIG_H
  #include <dix-config.h>
  #endif
  
  #ifdef SECURE_RPC
  
  #include <X11/X.h>
  #include "Xauth.h"
  #include "misc.h"
  #include "os.h"
  #include "dixstruct.h"
  
  #include <rpc/rpc.h>
  
  #ifdef sun
  /* <rpc/auth.h> only includes this if _KERNEL is #defined... */
  extern bool_t xdr_opaque_auth(XDR *, struct opaque_auth *);
  #endif
  
  #if defined(DGUX)
  #include <time.h>
  #include <rpc/auth_des.h>
  #endif /* DGUX */
  
  #ifdef ultrix
  #include <time.h>
  #include <rpc/auth_des.h>
  #endif
  
  static enum auth_stat why;
  
  static char * 
  authdes_ezdecode(char *inmsg, int len)
  {
      struct rpc_msg  msg;
      char            cred_area[MAX_AUTH_BYTES];
      char            verf_area[MAX_AUTH_BYTES];
      char            *temp_inmsg;
      struct svc_req  r;
      bool_t          res0, res1;
      XDR             xdr;
      SVCXPRT         xprt;
  
      temp_inmsg = (char *) xalloc(len);
      memmove(temp_inmsg, inmsg, len);
  
      memset((char *)&msg, 0, sizeof(msg));
      memset((char *)&r, 0, sizeof(r));
      memset(cred_area, 0, sizeof(cred_area));
      memset(verf_area, 0, sizeof(verf_area));
  
      msg.rm_call.cb_cred.oa_base = cred_area;
      msg.rm_call.cb_verf.oa_base = verf_area;
      why = AUTH_FAILED; 
      xdrmem_create(&xdr, temp_inmsg, len, XDR_DECODE);
  
      if ((r.rq_clntcred = (caddr_t) xalloc(MAX_AUTH_BYTES)) == NULL)
          goto bad1;
      r.rq_xprt = &xprt;
  
      /* decode into msg */
      res0 = xdr_opaque_auth(&xdr, &(msg.rm_call.cb_cred)); 
      res1 = xdr_opaque_auth(&xdr, &(msg.rm_call.cb_verf));
      if ( ! (res0 && res1) )
           goto bad2;
  
      /* do the authentication */
  
      r.rq_cred = msg.rm_call.cb_cred;        /* read by opaque stuff */
      if (r.rq_cred.oa_flavor != AUTH_DES) {
          why = AUTH_TOOWEAK;
          goto bad2;
      }
  #ifdef SVR4
      if ((why = __authenticate(&r, &msg)) != AUTH_OK) {
  #else
      if ((why = _authenticate(&r, &msg)) != AUTH_OK) {
  #endif
              goto bad2;
      }
      return (((struct authdes_cred *) r.rq_clntcred)->adc_fullname.name); 
  
  bad2:
      xfree(r.rq_clntcred);
  bad1:
      return ((char *)0); /* ((struct authdes_cred *) NULL); */
  }
  
  static XID  rpc_id = (XID) ~0L;
  
  static Bool
  CheckNetName (
      unsigned char    *addr,
      short	    len,
      pointer	    closure
  )
  {
      return (len == strlen ((char *) closure) &&
  	    strncmp ((char *) addr, (char *) closure, len) == 0);
  }
  
  static char rpc_error[MAXNETNAMELEN+50];
  
  XID
  SecureRPCCheck (unsigned short data_length, char *data, 
      ClientPtr client, char **reason)
  {
      char *fullname;
      
      if (rpc_id == (XID) ~0L) {
  	*reason = "Secure RPC authorization not initialized";
      } else {
  	fullname = authdes_ezdecode(data, data_length);
  	if (fullname == (char *)0) {
  	    snprintf(rpc_error, sizeof(rpc_error), 
  		     "Unable to authenticate secure RPC client (why=%d)", why);
  	    *reason = rpc_error;
  	} else {
  	    if (ForEachHostInFamily (FamilyNetname, CheckNetName, fullname))
  		return rpc_id;
  	    snprintf(rpc_error, sizeof(rpc_error), 
  		     "Principal \"%s\" is not authorized to connect",
  		     fullname);
  	    *reason = rpc_error;
  	}
      }
      return (XID) ~0L;
  }
      
  void
  SecureRPCInit (void)
  {
      if (rpc_id == ~0L)
  	AddAuthorization (9, "SUN-DES-1", 0, (char *) 0);
  }
  
  int
  SecureRPCAdd (unsigned short data_length, char *data, XID id)
  {
      if (data_length)
  	AddHost ((pointer) 0, FamilyNetname, data_length, data);
      rpc_id = id;
      return 1;
  }
  
  int
  SecureRPCReset (void)
  {
      rpc_id = (XID) ~0L;
      return 1;
  }
  
  XID
  SecureRPCToID (unsigned short data_length, char *data)
  {
      return rpc_id;
  }
  
  int
  SecureRPCFromID (XID id, unsigned short *data_lenp, char **datap)
  {
      return 0;
  }
  
  int
  SecureRPCRemove (unsigned short data_length, char *data)
  {
      return 0;
  }
  #endif /* SECURE_RPC */