Merge bitcoin#29858: test: Add test for rpcwhitelistdefault

f0e5e4c test: Add test for rpcwhitelistdefault (naiyoma)

Pull request description:

  This PR adds tests for `rpcwhitelistdefault.` The implementation is a continuation of this [PR](bitcoin#17805).

  Applied suggestions  to include the tests in` rpc_whitelist.py` and to use a single node.

  PR covers three test cases:
  - rpcwhitelistdefault = 0, no permissions
  - rpcwhitelistdefault = 1, no permissions
  - rpcwhitelistdefault = 1, with user permissions

  I didn't add tests for rpcwhitelistdefault = 0 with user permissions since that is already tested here: [rpc_whitelist.py#L77](https://github.com/bitcoin/bitcoin/blob/master/test/functional/rpc_whitelist.py#L77).

ACKs for top commit:
  achow101:
    ACK f0e5e4c
  ryanofsky:
    Code review ACK f0e5e4c. PR seems very clear and simple, moving 1 test and adding 3 new tests.
  ismaelsadeeq:
    Tested and Code review ACK f0e5e4c

Tree-SHA512: c3652940d2f23746e769ebe834e43dee47b7af8f258cbb133e38663aa8a05a1a8d0194d3008c3a10b0c54d11b5b95420c9cad0aa761c0fc1b9559277443b0696

Author: achow101

test/functional/rpc_whitelist.py

@@ -13,6 +13,7 @@
 import http.client
 import urllib.parse
 
+
 def rpccall(node, user, method):
     url = urllib.parse.urlparse(node.url)
     headers = {"Authorization": "Basic " + str_to_b64str('{}:{}'.format(user[0], user[3]))}
@@ -24,7 +25,12 @@ def rpccall(node, user, method):
     return resp
 
 
+def get_permissions(whitelist):
+    return [perm for perm in whitelist.replace(" ", "").split(",") if perm]
+
+
 class RPCWhitelistTest(BitcoinTestFramework):
+
     def set_test_params(self):
         self.num_nodes = 1
 
@@ -48,7 +54,9 @@ def run_test(self):
             ["strangedude4", "990c895760a70df83949e8278665e19a$8f0906f20431ff24cb9e7f5b5041e4943bdf2a5c02a19ef4960dcf45e72cde1c", ":getblockcount, getbestblockhash", "s7R4nG3R7H1nGZ"],
             ["strangedude4", "990c895760a70df83949e8278665e19a$8f0906f20431ff24cb9e7f5b5041e4943bdf2a5c02a19ef4960dcf45e72cde1c", ":getblockcount", "s7R4nG3R7H1nGZ"],
             # Testing the same permission twice
-            ["strangedude5", "d12c6e962d47a454f962eb41225e6ec8$2dd39635b155536d3c1a2e95d05feff87d5ba55f2d5ff975e6e997a836b717c9", ":getblockcount,getblockcount", "s7R4nG3R7H1nGZ"]
+            ["strangedude5", "d12c6e962d47a454f962eb41225e6ec8$2dd39635b155536d3c1a2e95d05feff87d5ba55f2d5ff975e6e997a836b717c9", ":getblockcount,getblockcount", "s7R4nG3R7H1nGZ"],
+            # Test non-whitelisted user
+            ["strangedude6", "ab02e4fb22ef4ab004cca217a49ee8d2$90dd09b08edd12d552d9d8a5ada838dcef2ac587789fa7e9c47f5990e80cdf93", None, "password123"]
         ]
         # These commands shouldn't be allowed for any user to test failures
         self.never_allowed = ["getnetworkinfo"]
@@ -60,21 +68,11 @@ def run_test(self):
             # Special cases
             for strangedude in self.strange_users:
                 f.write("rpcauth=" + strangedude[0] + ":" + strangedude[1] + "\n")
-                f.write("rpcwhitelist=" + strangedude[0] + strangedude[2] + "\n")
+                if strangedude[2] is not None:
+                    f.write("rpcwhitelist=" + strangedude[0] + strangedude[2] + "\n")
         self.restart_node(0)
 
         for user in self.users:
-            permissions = user[2].replace(" ", "").split(",")
-            # Pop all empty items
-            i = 0
-            while i < len(permissions):
-                if permissions[i] == '':
-                    permissions.pop(i)
-
-                i += 1
-            for permission in permissions:
-                self.log.info("[" + user[0] + "]: Testing a permitted permission (" + permission + ")")
-                assert_equal(200, rpccall(self.nodes[0], user, permission).status)
             for permission in self.never_allowed:
                 self.log.info("[" + user[0] + "]: Testing a non permitted permission (" + permission + ")")
                 assert_equal(403, rpccall(self.nodes[0], user, permission).status)
@@ -92,5 +90,56 @@ def run_test(self):
         self.log.info("Strange test 5")
         assert_equal(200, rpccall(self.nodes[0], self.strange_users[4], "getblockcount").status)
 
+        self.test_users_permissions()
+        self.test_rpcwhitelistdefault_0_no_permissions()
+
+        # Replace file configurations
+        self.nodes[0].replace_in_config([("rpcwhitelistdefault=0", "rpcwhitelistdefault=1")])
+        with open(self.nodes[0].datadir_path / "bitcoin.conf", 'a', encoding='utf8') as f:
+            f.write("rpcwhitelist=__cookie__:getblockcount,getblockchaininfo,getmempoolinfo,stop\n")
+        self.restart_node(0)
+
+        # Test rpcwhitelistdefault=1
+        self.test_users_permissions()
+        self.test_rpcwhitelistdefault_1_no_permissions()
+
+    def test_users_permissions(self):
+        """
+        * Permissions:
+            (user1): getbestblockhash,getblockcount
+            (user2): getblockcount
+        Expected result:  * users can only access whitelisted methods
+        """
+        for user in self.users:
+            permissions = get_permissions(user[2])
+            for permission in permissions:
+                self.log.info("[" + user[0] + "]: Testing whitelisted user permission (" + permission + ")")
+                assert_equal(200, rpccall(self.nodes[0], user, permission).status)
+            self.log.info("[" + user[0] + "]: Testing non-permitted permission: getblockchaininfo")
+            assert_equal(403, rpccall(self.nodes[0], user, "getblockchaininfo").status)
+
+    def test_rpcwhitelistdefault_0_no_permissions(self):
+        """
+        * rpcwhitelistdefault=0
+        * No Permissions defined
+        Expected result: * strangedude6 (not whitelisted) can access any method
+        """
+        unrestricted_user = self.strange_users[6]
+        for permission in ["getbestblockhash", "getblockchaininfo"]:
+            self.log.info("[" + unrestricted_user[0] + "]: Testing unrestricted user permission (" + permission + ")")
+            assert_equal(200, rpccall(self.nodes[0], unrestricted_user, permission).status)
+
+    def test_rpcwhitelistdefault_1_no_permissions(self):
+        """
+        * rpcwhitelistdefault=1
+        * No Permissions defined
+        Expected result: * strangedude6 (not whitelisted) can not access any method
+        """
+
+        for permission in ["getbestblockhash", "getblockchaininfo"]:
+            self.log.info("[" + self.strange_users[6][0] + "]: Testing rpcwhitelistdefault=1 no specified permission (" + permission + ")")
+            assert_equal(403, rpccall(self.nodes[0], self.strange_users[6], permission).status)
+
+
 if __name__ == "__main__":
     RPCWhitelistTest(__file__).main()