[Qt] Console: don't allow empty arguments when using the comma-syntax

src/qt/rpcconsole.cpp

@@ -138,6 +138,7 @@ bool RPCConsole::RPCExecuteCommandLine(std::string &strResult, const std::string
     {
         STATE_EATING_SPACES,
         STATE_EATING_SPACES_IN_ARG,
+        STATE_EATING_SPACES_IN_BRACKETS,
         STATE_ARGUMENT,
         STATE_SINGLEQUOTED,
         STATE_DOUBLEQUOTED,
@@ -222,6 +223,7 @@ bool RPCConsole::RPCExecuteCommandLine(std::string &strResult, const std::string
             }
             case STATE_ARGUMENT: // In or after argument
             case STATE_EATING_SPACES_IN_ARG:
+            case STATE_EATING_SPACES_IN_BRACKETS:
             case STATE_EATING_SPACES: // Handle runs of whitespace
                 switch(ch)
             {
@@ -229,6 +231,8 @@ bool RPCConsole::RPCExecuteCommandLine(std::string &strResult, const std::string
                 case '\'': state = STATE_SINGLEQUOTED; break;
                 case '\\': state = STATE_ESCAPE_OUTER; break;
                 case '(': case ')': case '\n':
+                    if (state == STATE_EATING_SPACES_IN_ARG)
+                        throw std::runtime_error("Invalid Syntax");
                     if (state == STATE_ARGUMENT)
                     {
                         if (ch == '(' && stack.size() && stack.back().size() > 0)
@@ -240,7 +244,7 @@ bool RPCConsole::RPCExecuteCommandLine(std::string &strResult, const std::string
 
                         stack.back().push_back(curarg);
                         curarg.clear();
-                        state = STATE_EATING_SPACES;
+                        state = STATE_EATING_SPACES_IN_BRACKETS;
                     }
                     if ((ch == ')' || ch == '\n') && stack.size() > 0)
                     {
@@ -257,12 +261,20 @@ bool RPCConsole::RPCExecuteCommandLine(std::string &strResult, const std::string
                     }
                     break;
                 case ' ': case ',': case '\t':
-                    if(state == STATE_ARGUMENT || (state == STATE_EATING_SPACES_IN_ARG && ch == ',')) // Space ends argument
+                    if(state == STATE_EATING_SPACES_IN_ARG && curarg.empty() && ch == ',')
+                        throw std::runtime_error("Invalid Syntax");
+
+                    else if(state == STATE_ARGUMENT) // Space ends argument
                     {
                         stack.back().push_back(curarg);
                         curarg.clear();
                     }
-                    state = (ch == ',' ? STATE_EATING_SPACES_IN_ARG : STATE_EATING_SPACES);
+                    if ((state == STATE_EATING_SPACES_IN_BRACKETS || state == STATE_ARGUMENT) && ch == ',')
+                    {
+                        state = STATE_EATING_SPACES_IN_ARG;
+                        break;
+                    }
+                    state = STATE_EATING_SPACES;
                     break;
                 default: curarg += ch; state = STATE_ARGUMENT;
             }

src/qt/test/rpcnestedtests.cpp

@@ -15,6 +15,7 @@
 #include "util.h"
 
 #include <QDir>
+#include <QtGlobal>
 
 #include <boost/filesystem.hpp>
 
@@ -77,16 +78,6 @@ void RPCNestedTests::rpcNestedTests()
     RPCConsole::RPCExecuteCommandLine(result, "getblockchaininfo "); //whitespace at the end will be tolerated
     QVERIFY(result.substr(0,1) == "{");
 
-#if QT_VERSION >= 0x050300
-    // do the QVERIFY_EXCEPTION_THROWN checks only with Qt5.3 and higher (QVERIFY_EXCEPTION_THROWN was introduced in Qt5.3)
-    QVERIFY_EXCEPTION_THROWN(RPCConsole::RPCExecuteCommandLine(result, "getblockchaininfo() .\n"), std::runtime_error); //invalid syntax
-    QVERIFY_EXCEPTION_THROWN(RPCConsole::RPCExecuteCommandLine(result, "getblockchaininfo() getblockchaininfo()"), std::runtime_error); //invalid syntax
-    (RPCConsole::RPCExecuteCommandLine(result, "getblockchaininfo(")); //tolerate non closing brackets if we have no arguments
-    (RPCConsole::RPCExecuteCommandLine(result, "getblockchaininfo()()()")); //tolerate non command brackts
-    QVERIFY_EXCEPTION_THROWN(RPCConsole::RPCExecuteCommandLine(result, "getblockchaininfo(True)"), UniValue); //invalid argument
-    QVERIFY_EXCEPTION_THROWN(RPCConsole::RPCExecuteCommandLine(result, "a(getblockchaininfo(True))"), UniValue); //method not found
-#endif
-
     (RPCConsole::RPCExecuteCommandLine(result, "getblockchaininfo()[\"chain\"]")); //Quote path identifier are allowed, but look after a child contaning the quotes in the key
     QVERIFY(result == "null");
 
@@ -113,8 +104,25 @@ void RPCNestedTests::rpcNestedTests()
     QVERIFY(result == "[\"abc\",\"abc\"]");
     RPCConsole::RPCExecuteCommandLine(result, "rpcNestedTest abc\t\tabc");
     QVERIFY(result == "[\"abc\",\"abc\"]");
-    RPCConsole::RPCExecuteCommandLine(result, "rpcNestedTest abc,,abc");
+    RPCConsole::RPCExecuteCommandLine(result, "rpcNestedTest(abc )");
-    QVERIFY(result == "[\"abc\",\"\",\"abc\"]");
+    QVERIFY(result == "[\"abc\"]");
+    RPCConsole::RPCExecuteCommandLine(result, "rpcNestedTest( abc )");
+    QVERIFY(result == "[\"abc\"]");
+    RPCConsole::RPCExecuteCommandLine(result, "rpcNestedTest(   abc   ,   cba )");
+    QVERIFY(result == "[\"abc\",\"cba\"]");
+
+#if QT_VERSION >= 0x050300
+    // do the QVERIFY_EXCEPTION_THROWN checks only with Qt5.3 and higher (QVERIFY_EXCEPTION_THROWN was introduced in Qt5.3)
+    QVERIFY_EXCEPTION_THROWN(RPCConsole::RPCExecuteCommandLine(result, "getblockchaininfo() .\n"), std::runtime_error); //invalid syntax
+    QVERIFY_EXCEPTION_THROWN(RPCConsole::RPCExecuteCommandLine(result, "getblockchaininfo() getblockchaininfo()"), std::runtime_error); //invalid syntax
+    (RPCConsole::RPCExecuteCommandLine(result, "getblockchaininfo(")); //tolerate non closing brackets if we have no arguments
+    (RPCConsole::RPCExecuteCommandLine(result, "getblockchaininfo()()()")); //tolerate non command brackts
+    QVERIFY_EXCEPTION_THROWN(RPCConsole::RPCExecuteCommandLine(result, "getblockchaininfo(True)"), UniValue); //invalid argument
+    QVERIFY_EXCEPTION_THROWN(RPCConsole::RPCExecuteCommandLine(result, "a(getblockchaininfo(True))"), UniValue); //method not found
+    QVERIFY_EXCEPTION_THROWN(RPCConsole::RPCExecuteCommandLine(result, "rpcNestedTest abc,,abc"), std::runtime_error); //don't tollerate empty arguments when using ,
+    QVERIFY_EXCEPTION_THROWN(RPCConsole::RPCExecuteCommandLine(result, "rpcNestedTest(abc,,abc)"), std::runtime_error); //don't tollerate empty arguments when using ,
+    QVERIFY_EXCEPTION_THROWN(RPCConsole::RPCExecuteCommandLine(result, "rpcNestedTest(abc,,)"), std::runtime_error); //don't tollerate empty arguments when using ,
+#endif
 
     delete pcoinsTip;
     delete pcoinsdbview;