private static File BuildFileCFGAndExtractFileInformation(KeyValuePair <string, XmlDocument> parsedFile)
{
var traverser = new XmlTraverser();
var metricAnalyzer = new MetricVisitor();
var extractor = new ClassAndFunctionExtractor();
var printer = new ASTPrinter(Console.Out);
var cfgcreator = new CFGCreator();
traverser.AddVisitor(extractor);
traverser.AddVisitor(metricAnalyzer);
traverser.AddVisitor(cfgcreator);
//traverser.AddVisitor(printer);
traverser.AddVisitors(_components.AstVisitors.ToArray());
traverser.Traverse(parsedFile.Value.FirstChild.NextSibling);
foreach (var function in extractor.Functions)
{
function.File = parsedFile.Key;
}
foreach (var closure in extractor.Closures)
{
closure.File = parsedFile.Key;
}
_funcHandler.CustomFunctions.AddRange(extractor.Functions);
foreach (var @class in extractor.Classes)
{
@class.File = parsedFile.Key;
foreach (var method in @class.Methods)
{
//HACK: This is not a good way to handle this! Should we add a new derived function class called method that includes the class name
//-||-: and make a special list for them in the function handler, or is this okay?
method.Name = @class.Name + "->" + method.Name;
method.File = parsedFile.Key;
_funcHandler.CustomFunctions.Add(method);
}
}
//cfgcreator.Graph.VisualizeGraph("graph", Program.Configuration.GraphSettings);
var cfgPruner = new CFGPruner();
cfgPruner.Prune(cfgcreator.Graph);
//cfgcreator.Graph.VisualizeGraph("graph-pruned", Configuration.GraphSettings);
File file = new File(parsedFile.Value)
{
CFG = cfgcreator.Graph,
FullPath = parsedFile.Key,
Interfaces = extractor.Interfaces.GroupBy(i => i.Name, i => i).ToDictionary(i => i.Key, i => i.ToList()),
Classes = extractor.Classes.GroupBy(c => c.Name, c => c).ToDictionary(c => c.Key, c => c.ToList()),
Closures = extractor.Closures.ToArray(),
Functions = extractor.Functions.GroupBy(i => i.Name, i => i).ToDictionary(i => i.Key, i => i.ToList())
};
return(file);
}
public void CFGCreator_RootAndExitIsStmtClassMethod(string phpcode)
{
var extract = ParseAndExtract(phpcode);
foreach (var @class in extract.Classes)
{
foreach (var method in @class.Methods)
{
var ast = method.AstNode;
var traverser = new XmlTraverser();
var cfgcreator = new CFGCreator();
traverser.AddVisitor(cfgcreator);
traverser.Traverse(ast);
var graph = cfgcreator.Graph;
//Root assertions
Assert.AreEqual(AstConstants.Nodes.Stmt_ClassMethod, graph.Vertices.First().ToString());
graph.AssertInEdges(graph.Vertices.First(), 0, "Entry node - in edges");
graph.AssertOutEdges(graph.Vertices.First(), 1, "Entry node - out edges");
Assert.AreEqual(true, graph.Vertices.First().IsRoot);
//Leaf assertions
graph.AssertOutEdges(graph.Vertices.ElementAt(1), 0, "Exit node - out edges");
Assert.AreEqual(true, graph.Vertices.ElementAt(1).IsLeaf);
}
}
}
public void CFGCreator_RootAndExitIsClousure(string phpCode)
{
var extract = ParseAndExtract(phpCode);
foreach (var closure in extract.Closures)
{
var ast = closure.AstNode;
var traverser = new XmlTraverser();
var cfgcreator = new CFGCreator();
traverser.AddVisitor(cfgcreator);
traverser.Traverse(ast);
var graph = cfgcreator.Graph;
//Root
Assert.IsTrue(graph.Vertices.First().IsRoot, "the first vertix is not the root node");
Assert.IsTrue(graph.Vertices.First().IsSpecialBlock, "The first node was not marked with IsSpecialBlock");
graph.AssertInEdges(graph.Vertices.First(), 0, "Entry node contains in edges");
graph.AssertOutEdges(graph.Vertices.First(), 1, "Entry node did not have exactly one out edge");
Assert.AreEqual(AstConstants.Nodes.Expr_Closure, graph.Vertices.First().ToString(), "The root node was not a closure, and was expected to be a closure");
//Leaf
Assert.IsTrue(graph.Vertices.ElementAt(1).IsLeaf, "The element at position one was not the exit block");
Assert.IsTrue(graph.Vertices.ElementAt(1).IsSpecialBlock, "The element at position one was not marked with IsSpecialBlock");
graph.AssertOutEdges(graph.Vertices.ElementAt(1), 0, "The exit block contained out edged");
Assert.AreEqual(AstConstants.Nodes.Expr_Closure, graph.Vertices.ElementAt(1).ToString());
}
}
public void CFGCreator_RootAndExitIsStmtFunction(string phpcode)
{
var extract = ParseAndExtract(phpcode);
foreach (var func in extract.Functions)
{
var ast = func.AstNode;
var traverser = new XmlTraverser();
var cfgcreator = new CFGCreator();
traverser.AddVisitor(cfgcreator);
traverser.Traverse(ast);
var graph = cfgcreator.Graph;
//Root assertions
Assert.IsTrue(graph.Vertices.First().IsRoot, "first node was not the root node");
Assert.IsTrue(graph.Vertices.First().IsSpecialBlock, "first node was not marked as IsSpecialBlock");
graph.AssertInEdges(graph.Vertices.First(), 0, "Entry node - in edges");
graph.AssertOutEdges(graph.Vertices.First(), 1, "Entry node - out edges");
Assert.AreEqual(AstConstants.Nodes.Stmt_Function, graph.Vertices.First().ToString());
//Leaf assertions
Assert.IsTrue(graph.Vertices.ElementAt(1).IsSpecialBlock, "The element at position 1 was not marked with IsSpecialBlock");
Assert.AreEqual(true, graph.Vertices.ElementAt(1).IsLeaf, "The element at position 1 was not marked with IsLeaf");
graph.AssertOutEdges(graph.Vertices.ElementAt(1), 0, "Exit node - out edges");
}
}
public static T ParseAndIterate <T>(string phpCode, string phpParser) where T : IXmlVisitor, new()
{
XmlNode ast = ParsePHPCode(phpCode, phpParser);
var traverser = new XmlTraverser();
var visitor = new T();
traverser.AddVisitor(visitor);
traverser.Traverse(ast.FirstChild.NextSibling);
return(visitor);
}
/// <summary>
/// Analyses a custom function in for security issues, with the currenctly known taint for actual parameters.
/// </summary>
/// <returns>A TainSets for the custom function that is being analyzed</returns>
/// <param name="customFunction">Custom function object to perform the analysis on</param>
/// <param name="varStorage">The currently known variable storage (this is to included because of superglobals, globals etc.)</param>
/// <param name="paramActualVals">Parameter actual values</param>
/// <param name="resolver">File inclusion resolver</param>
/// <param name="includeStack">Currently known includes</param>
/// <param name="functionCalls">Currently known function calls</param>
internal ExpressionInfo AnalyseCustomFunction(Function customFunction, ImmutableVariableStorage varStorage, IVulnerabilityStorage vulnerabilityStorage,
IList <ExpressionInfo> paramActualVals, IIncludeResolver resolver, AnalysisStacks stacks)
{
var stmts = customFunction.AstNode.GetSubNode(AstConstants.Subnode + ":" + AstConstants.Subnodes.Stmts).FirstChild;
var traverser = new XmlTraverser();
var cfgcreator = new CFGCreator();
traverser.AddVisitor(cfgcreator);
traverser.Traverse(stmts);
var cfgPruner = new CFGPruner();
cfgPruner.Prune(cfgcreator.Graph);
var initialTaint = varStorage.ToMutable();
initialTaint.SuperGlobals.Clear();
initialTaint.SuperGlobals.AddRange(varStorage.SuperGlobals);
initialTaint.LocalVariables.Clear();
initialTaint.LocalAccessibleGlobals.Clear();
for (int i = 1; i <= paramActualVals.Count; i++)
{
var paramFormal = customFunction.Parameters.FirstOrDefault(x => x.Key.Item1 == i);
if (paramFormal.Value == null)
{
continue;
}
var @var = new Variable(paramFormal.Value.Name, VariableScope.Function)
{
Info = paramActualVals[i - 1].ValueInfo
};
initialTaint.LocalVariables.Add(paramFormal.Value.Name, @var);
}
var blockAnalyzer = new TaintBlockAnalyzer(vulnerabilityStorage, resolver, AnalysisScope.Function, fileAnalyzer, stacks, subroutineAnalyzerFactory, _funcHandler);
blockAnalyzer.AnalysisExtensions.AddRange(AnalysisExtensions);
var condAnalyser = new ConditionTaintAnalyser(AnalysisScope.Function, resolver, stacks.IncludeStack, _funcHandler);
var cfgTaintAnalysis = new TaintAnalysis(blockAnalyzer, condAnalyser, ImmutableVariableStorage.CreateFromMutable(initialTaint));
//var taintAnalysis = new CFGTraverser(new ForwardTraversal(), cfgTaintAnalysis, new QueueWorklist());
var taintAnalysis = new CFGTraverser(new ForwardTraversal(), cfgTaintAnalysis, new ReversePostOrderWorkList(cfgcreator.Graph));
taintAnalysis.Analyze(cfgcreator.Graph);
var exprInfoAll = new ExpressionInfo();
foreach (ExpressionInfo exprInfo in blockAnalyzer.ReturnInfos)
{
exprInfoAll = exprInfoAll.Merge(exprInfo);
}
return(exprInfoAll);
}
private ReachingSet AnalyzeNode(TaggedEdge <CFGBlock, EdgeTag> edge)
{
if (ReachingSetDictionary[edge.Source] == null)
{
ReachingSetDictionary = ReachingSetDictionary.SetItem(edge.Source, new ReachingSet());
}
if (ReachingSetDictionary[edge.Target] == null)
{
ReachingSetDictionary = ReachingSetDictionary.SetItem(edge.Target, new ReachingSet());
}
var node = edge.Target;
// IN:
// U RD_OUT(l')
// (l'~>l)
ReachingSetDictionary = ReachingSetDictionary.SetItem(node,
ReachingSetDictionary[node].AddInVarRange(ReachingSetDictionary[edge.Source].DefinedOutVars, true));
// OUT:
// (RD_IN(l) \ kill(l)) U gen(l)
var Out = ReachingSetDictionary[node];
Out = Out.AddOutVarRange(ReachingSetDictionary[node].DefinedInVars);
XmlTraverser xmlTraverser = new XmlTraverser();
CFGASTNodeVisitor nodeVisitor = new CFGASTNodeVisitor();
xmlTraverser.AddVisitor(nodeVisitor);
if (node.AstEntryNode != null)
{
var nodeToTraverse = Conditional.HasConditionNode(node.AstEntryNode) ? Conditional.GetCondNode(node.AstEntryNode)
: node.AstEntryNode;
xmlTraverser.Traverse(nodeToTraverse);
foreach (var currNode in nodeVisitor.NodesOfInterest)
{
var varNode = AstNodeInfo.GetVarNameXmlNode(currNode);
ValueInfo varInfo = new ValueInfo()
{
Block = node
};
varInfo = VariableInfoComposer.AnalyzeBlock(varInfo);
var gs = new Variable(AstNodeInfo.GetVarNameXmlNode(currNode).Name, VariableScope.Unknown);
gs = gs.AddVarInfo(varInfo);
Out = Out.AddOutVar(varNode.InnerText, gs);
}
}
ReachingSetDictionary = ReachingSetDictionary.SetItem(node, ReachingSetDictionary[node].AddOutVarRange(Out.DefinedOutVars));
return(ReachingSetDictionary[node]);
}
private static void WPGotoAnalysis(Arguments arguments, Config configuration)
{
var v = Stopwatch.StartNew();
var folders = Directory.GetDirectories(@"G:\WP");
int counter = 0;
var progress = new BikeGuyRidingAnimation(folders.Count());
var locker = new object();
Parallel.ForEach(folders, new ParallelOptions()
{
MaxDegreeOfParallelism = 7
},
folder =>
{
int myNumber = Interlocked.Increment(ref counter);
arguments.Target = Path.Combine(arguments.Target, folder);
if (!Directory.Exists(arguments.Target))
{
return;
}
var projectParser = new ProjectParser(arguments.Target, configuration.PHPSettings);
ParseResult parseResult = projectParser.ParseProjectFiles();
foreach (var parsedFile in parseResult.ParsedFiles)
{
//Console.WriteLine("File: " + parsedFile.Key);
var traverser = new XmlTraverser();
var metricVisitor = new MetricVisitor();
traverser.AddVisitor(metricVisitor);
traverser.Traverse(parsedFile.Value);
if (metricVisitor.Gotos > 0)
{
lock (locker)
{
System.IO.File.AppendAllLines(@"C:/pluginDLMessages.txt", new [] { "Goto found in " + parsedFile.Key });
}
}
}
//Console.WriteLine(folder);
if ((myNumber % 250) == 0)
{
Console.WriteLine(myNumber + " plugins scanned..");
}
});
Console.WriteLine(v.Elapsed);
Environment.Exit(1);
}
