Xnamespace: add support for multiple auth tokens per namespace

Support having more than one auth token per namespace, so separate tokens
can be handed out to clients that are still landing in the same namespace.

Signed-off-by: Enrico Weigelt, metux IT consult <info@metux.net>

Xext/namespace/config.c

@@ -105,21 +105,27 @@ static void parseLine(char *line, struct Xnamespace **walk_ns)
         if (token == NULL)
             return;
 
-        curr->authProto = strdup(token);
+        struct auth_token *new_token = calloc(1, sizeof(struct auth_token));
+        if (new_token == NULL)
+            FatalError("Xnamespace: failed allocating token\n");
+
+        new_token->authProto = strdup(token);
         token = strtok(NULL, " ");
 
-        curr->authTokenLen = strlen(token)/2;
-        curr->authTokenData = calloc(1, curr->authTokenLen);
-        if (!curr->authTokenData) {
-            curr->authTokenLen = 0;
+        new_token->authTokenLen = strlen(token)/2;
+        new_token->authTokenData = calloc(1, new_token->authTokenLen);
+        if (!new_token->authTokenData) {
+            free(new_token);
             return;
         }
-        hex2bin(token, curr->authTokenData);
+        hex2bin(token, new_token->authTokenData);
 
-        AddAuthorization(strlen(curr->authProto),
-                         curr->authProto,
-                         curr->authTokenLen,
-                         curr->authTokenData);
+        new_token->authId = AddAuthorization(strlen(new_token->authProto),
+                                             new_token->authProto,
+                                             new_token->authTokenLen,
+                                             new_token->authTokenData);
+
+        xorg_list_append(&new_token->entry, &curr->auth_tokens);
         return;
     }
 
@@ -179,13 +185,15 @@ Bool XnsLoadConfig(void)
 
     struct Xnamespace *ns;
     xorg_list_for_each_entry(ns, &ns_list, entry) {
-        XNS_LOG("namespace: \"%s\" \"%s\" \"",
-            ns->name,
-            ns->authProto);
-        for (int i=0; i<ns->authTokenLen; i++)
-            printf("%02X", (unsigned char)ns->authTokenData[i]);
+        XNS_LOG("namespace: \"%s\" \n", ns->name);
+        struct auth_token *at;
+        xorg_list_for_each_entry(at, &ns->auth_tokens, entry) {
+            XNS_LOG("      auth: \"%s\" \"", at->authProto);
+            for (int i=0; i<at->authTokenLen; i++)
+                printf("%02X", (unsigned char)at->authTokenData[i]);
             printf("\"\n");
         }
+    }
 
     return TRUE;
 }

Xext/namespace/namespace.c

@@ -76,13 +76,16 @@ struct Xnamespace* XnsFindByAuth(size_t szAuthProto, const char* authProto, size
 {
     struct Xnamespace *walk;
     xorg_list_for_each_entry(walk, &ns_list, entry) {
-        int protoLen = walk->authProto ? strlen(walk->authProto) : 0;
+        struct auth_token *at;
+        xorg_list_for_each_entry(at, &walk->auth_tokens, entry) {
+            int protoLen = at->authProto ? strlen(at->authProto) : 0;
             if ((protoLen == szAuthProto) &&
-            (walk->authTokenLen == szAuthToken) &&
-            (memcmp(walk->authTokenData, authToken, szAuthToken)==0) &&
-            (memcmp(walk->authProto, authProto, szAuthProto)==0))
+                (at->authTokenLen == szAuthToken) &&
+                (memcmp(at->authTokenData, authToken, szAuthToken)==0) &&
+                (memcmp(at->authProto, authProto, szAuthProto)==0))
                 return walk;
         }
+    }
 
     // default to anonymous if credentials aren't assigned to specific NS
     return &ns_anon;

Xext/namespace/namespace.h

@@ -10,6 +10,14 @@
 #include "include/window.h"
 #include "include/windowstr.h"
 
+struct auth_token {
+    struct xorg_list entry;
+    const char *authProto;
+    char *authTokenData;
+    size_t authTokenLen;
+    XID authId;
+};
+
 struct Xnamespace {
     struct xorg_list entry;
     const char *name;
@@ -20,9 +28,7 @@ struct Xnamespace {
     Bool allowXInput;
     Bool allowXKeyboard;
     Bool superPower;
-    const char *authProto;
-    char *authTokenData;
-    size_t authTokenLen;
+    struct xorg_list auth_tokens;
     size_t refcnt;
     WindowPtr rootWindow;
 };

Xext/namespace/ns.conf.example

@@ -1,13 +1,18 @@
 
 # auth <proto> <hex-key>
   auth MIT-MAGIC-COOKIE-1 46f8e62b78e58962de0ceefc05ad90b0
+  auth MIT-MAGIC-COOKIE-1 56f8e62b78e58962de0ceefc05ad90b0
 
 # container <name> <parent_name>
 container xeyes root
   auth MIT-MAGIC-COOKIE-1 46f8e62b78e58962de0ceefc05ad90b8
+  auth MIT-MAGIC-COOKIE-1 46f8e62b78e58962de0ceefc05ad90a8
   allow mouse-motion
   allow shape
   allow xinput
 
 container xclock root
   auth MIT-MAGIC-COOKIE-1 46f8e62b78e58962de0ceefc05ad90b7
+  auth MIT-MAGIC-COOKIE-1 46f8e62b78e58962de0ceefc05ad91b7
+  auth MIT-MAGIC-COOKIE-1 46f8e62b78e58962de0ceefc05ad92b7
+  auth MIT-MAGIC-COOKIE-1 46f8e62b78e58962de0ceefc05ad93b7