/* $Xorg: auth.c,v 1.4 2001/02/09 02:05:59 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. ******************************************************************************/ /* $XFree86: xc/programs/xsm/auth.c,v 1.6 2001/01/17 23:46:28 dawes Exp $ */ #include "xsm.h" #include #include "auth.h" #ifdef HAVE_MKSTEMP #include #endif #include #include static char *addAuthFile = NULL; static char *remAuthFile = NULL; /* * Host Based Authentication Callback. This callback is invoked if * the connecting client can't offer any authentication methods that * we can accept. We can accept/reject based on the hostname. */ Bool HostBasedAuthProc(char *hostname) { return (0); /* For now, we don't support host based authentication */ } /* * We use temporary files which contain commands to add/remove entries from * the .ICEauthority file. */ static void write_iceauth(FILE *addfp, FILE *removefp, IceAuthDataEntry *entry) { fprintf (addfp, "add %s \"\" %s %s ", entry->protocol_name, entry->network_id, entry->auth_name); fprintfhex (addfp, entry->auth_data_length, entry->auth_data); fprintf (addfp, "\n"); fprintf (removefp, "remove protoname=%s protodata=\"\" netid=%s authname=%s\n", entry->protocol_name, entry->network_id, entry->auth_name); } #ifndef HAVE_MKSTEMP static char * unique_filename(const char *path, const char *prefix) #else static char * unique_filename(const char *path, const char *prefix, int *pFd) #endif { #ifndef HAVE_MKSTEMP #ifndef X_NOT_POSIX return ((char *) tempnam (path, prefix)); #else char tempFile[PATH_MAX]; char *tmp; snprintf (tempFile, sizeof(tempFile), "%s/%sXXXXXX", path, prefix); tmp = (char *) mktemp (tempFile); if (tmp) { return strdup(tmp); } else return (NULL); #endif #else char tempFile[PATH_MAX]; char *ptr; snprintf (tempFile, sizeof(tempFile), "%s/%sXXXXXX", path, prefix); ptr = strdup(tempFile); if (ptr != NULL) { *pFd = mkstemp(ptr); } return ptr; #endif } /* * Provide authentication data to clients that wish to connect */ #define MAGIC_COOKIE_LEN 16 Status SetAuthentication(int count, IceListenObj *listenObjs, IceAuthDataEntry **authDataEntries) { FILE *addfp = NULL; FILE *removefp = NULL; const char *path; mode_t original_umask; char command[256]; int i; #ifdef HAVE_MKSTEMP int fd; #endif original_umask = umask (0077); /* disallow non-owner access */ path = getenv ("SM_SAVE_DIR"); if (!path) { path = getenv ("HOME"); if (!path) path = "."; } #ifndef HAVE_MKSTEMP if ((addAuthFile = unique_filename (path, ".xsm")) == NULL) goto bad; if (!(addfp = fopen (addAuthFile, "w"))) goto bad; fcntl(fileno(addfp), F_SETFD, FD_CLOEXEC); if ((remAuthFile = unique_filename (path, ".xsm")) == NULL) goto bad; if (!(removefp = fopen (remAuthFile, "w"))) goto bad; fcntl(fileno(removefp), F_SETFD, FD_CLOEXEC); #else if ((addAuthFile = unique_filename (path, ".xsm", &fd)) == NULL) goto bad; if (!(addfp = fdopen(fd, "wb"))) goto bad; fcntl(fileno(addfp), F_SETFD, FD_CLOEXEC); if ((remAuthFile = unique_filename (path, ".xsm", &fd)) == NULL) goto bad; if (!(removefp = fdopen(fd, "wb"))) goto bad; fcntl(fileno(removefp), F_SETFD, FD_CLOEXEC); #endif if ((*authDataEntries = (IceAuthDataEntry *) XtMalloc ( count * 2 * sizeof (IceAuthDataEntry))) == NULL) goto bad; for (i = 0; i < count * 2; i += 2) { (*authDataEntries)[i].network_id = IceGetListenConnectionString (listenObjs[i/2]); (*authDataEntries)[i].protocol_name = "ICE"; (*authDataEntries)[i].auth_name = "MIT-MAGIC-COOKIE-1"; (*authDataEntries)[i].auth_data = IceGenerateMagicCookie (MAGIC_COOKIE_LEN); (*authDataEntries)[i].auth_data_length = MAGIC_COOKIE_LEN; (*authDataEntries)[i+1].network_id = IceGetListenConnectionString (listenObjs[i/2]); (*authDataEntries)[i+1].protocol_name = "XSMP"; (*authDataEntries)[i+1].auth_name = "MIT-MAGIC-COOKIE-1"; (*authDataEntries)[i+1].auth_data = IceGenerateMagicCookie (MAGIC_COOKIE_LEN); (*authDataEntries)[i+1].auth_data_length = MAGIC_COOKIE_LEN; write_iceauth (addfp, removefp, &(*authDataEntries)[i]); write_iceauth (addfp, removefp, &(*authDataEntries)[i+1]); IceSetPaAuthData (2, &(*authDataEntries)[i]); IceSetHostBasedAuthProc (listenObjs[i/2], HostBasedAuthProc); } fclose (addfp); fclose (removefp); umask (original_umask); snprintf (command, sizeof(command), "iceauth source %s", addAuthFile); execute_system_command (command); remove (addAuthFile); return (1); bad: if (addfp) fclose (addfp); if (removefp) fclose (removefp); if (addAuthFile) { remove (addAuthFile); free (addAuthFile); } if (remAuthFile) { remove (remAuthFile); free (remAuthFile); } return (0); } /* * Free up authentication data. */ void FreeAuthenticationData(int count, IceAuthDataEntry *authDataEntries) { /* Each transport has entries for ICE and XSMP */ char command[256]; int i; for (i = 0; i < count * 2; i++) { free (authDataEntries[i].network_id); free (authDataEntries[i].auth_data); } XtFree ((char *) authDataEntries); snprintf (command, sizeof(command), "iceauth source %s", remAuthFile); execute_system_command (command); remove (remAuthFile); free (addAuthFile); free (remAuthFile); }