public ImmutableVariableStorage GetTaint()
{
var defaultTaint = new DefaultTaintProvider().GetTaint();
var variableStorage = defaultTaint.ToMutable();
foreach (var superGlobal in variableStorage.SuperGlobals)
{
foreach (var var in superGlobal.Value.Info.Variables)
{
var newTaint = var.Value.Info.Taints.DeepClone();
if (newTaint.SqliTaint.Single().TaintTag > SQLITaint.SQL_NoQ)
{
newTaint.SqliTaint.Clear();
newTaint.SqliTaint.Add(new SQLITaintSet( SQLITaint.SQL_NoQ));
}
var.Value.Info.Taints = newTaint;
var.Value.Info.DefaultDimensionTaintFactory = () =>
new TaintSets(new SQLITaintSet(SQLITaint.SQL_NoQ), new XSSTaintSet(XSSTaint.XSS_ALL));
var.Value.Info.NestedVariableDefaultTaintFactory = var.Value.Info.DefaultDimensionTaintFactory;
}
}
var wpdbGlobal = new Variable("wpdb", VariableScope.File);
var prefixVar = new Variable("prefix", VariableScope.Instance) { Info = { Value = "Eir_" } };
wpdbGlobal.Info.Variables.Add(new VariableTreeDimension() { Key = "prefix" }, prefixVar);
wpdbGlobal.Info.ClassNames.Add("wpdb");
variableStorage.GlobalVariables.Add("wpdb", wpdbGlobal);
return ImmutableVariableStorage.CreateFromMutable(variableStorage);
}
private void ParseAndAnalyze(string php, IVulnerabilityStorage storage)
{
var extractedFuncs = PHPParseUtils.ParseAndIterate<ClassAndFunctionExtractor>(php, Config.PHPSettings.PHPParserPath).Functions;
FunctionsHandler.Instance.CustomFunctions.AddRange(extractedFuncs);
var cfg = PHPParseUtils.ParseAndIterate<CFGCreator>(php, Config.PHPSettings.PHPParserPath).Graph;
var incResolver = new IncludeResolver(new List<File>());
var fileStack = new Stack<File>();
fileStack.Push(new File() { FullPath = @"C:\TestFile.txt" });
var condAnalyser = new ConditionTaintAnalyser(AnalysisScope.File, incResolver, fileStack);
var funcMock = new Mock<Func<ImmutableVariableStorage, IIncludeResolver, AnalysisScope, AnalysisStacks, ImmutableVariableStorage>>();
var blockAnalyzer = new TaintBlockAnalyzer(storage, incResolver, AnalysisScope.File, funcMock.Object, new AnalysisStacks(fileStack), new FunctionAndMethodAnalyzerFactory());
var immutableInitialTaint = new DefaultTaintProvider().GetTaint();
var cfgTaintAnalysis = new TaintAnalysis(blockAnalyzer, condAnalyser, immutableInitialTaint);
var taintAnalysis = new CFGTraverser(new ForwardTraversal(), cfgTaintAnalysis, new QueueWorklist());
taintAnalysis.Analyze(cfg);
}
private static void ScanUnscannedSubroutines(List<File> filesCollection, Func<ImmutableVariableStorage, IIncludeResolver, AnalysisScope, AnalysisStacks, ImmutableVariableStorage> fileTaintAnalyzer, FunctionAndMethodAnalyzerFactory subroutineAnalyzerFactory, ReportingVulnerabilityStorage vulnerabilityStorage)
{
var defaultTaint = new DefaultTaintProvider().GetTaint();
foreach (var file in filesCollection)
{
var analysisStacks = new AnalysisStacks(file);
var analyser = new FunctionAndMethodAnalyzer(defaultTaint,
new IncludeResolver(filesCollection), analysisStacks,
new CustomFunctionHandler(fileTaintAnalyzer, subroutineAnalyzerFactory), vulnerabilityStorage);
foreach (var function in file.Functions.SelectMany(f => f.Value).Except(FunctionsHandler.Instance.ScannedFunctions))
{
var functionCall = new FunctionCall(function.Name, function.AstNode, 0, 0);
analysisStacks.CallStack.Push(functionCall);
analyser.AnalyzeFunctionCall(functionCall, new List<ExpressionInfo>());
}
foreach (var @class in file.Classes.SelectMany(c => c.Value))
{
foreach (var method in @class.Methods.Except(FunctionsHandler.Instance.ScannedFunctions))
{
var methodCall = new MethodCall(method.Name, new [] { @class.Name }, method.AstNode, 0, 0);
analysisStacks.CallStack.Push(methodCall);
analyser.AnalyzeMethodCall(methodCall, new List<ExpressionInfo>());
}
}
}
}
private void AssertNoOfVulnsInMultipleCodeFiles(Tuple<string, string>[] codeFiles, int numberOfVulns)
{
var vulnStorage = new Mock<IVulnerabilityStorage>();
var parsedFiles = codeFiles.Select(code => new File(PHPParseUtils.ParsePHPCode(code.Item2, Config.PHPSettings.PHPParserPath))
{
FullPath = code.Item1,
CFG = PHPParseUtils.ParseAndIterate<CFGCreator>(code.Item2, Config.PHPSettings.PHPParserPath).Graph
}).ToArray();
Func<ImmutableVariableStorage, IIncludeResolver, AnalysisScope, AnalysisStacks, ImmutableVariableStorage> fileTaintAnalyzer = null;
fileTaintAnalyzer = (varStorage, inclResolver, scope, stacks) =>
{
Preconditions.NotNull(varStorage, "varStorage");
Preconditions.NotNull(inclResolver, "inclResolver");
var fileToAnalyze = stacks.IncludeStack.Peek();
var blockAnalyzer = new TaintBlockAnalyzer(vulnStorage.Object, inclResolver, scope, fileTaintAnalyzer, stacks, new FunctionAndMethodAnalyzerFactory());
var condAnalyser = new ConditionTaintAnalyser(scope, inclResolver, stacks.IncludeStack);
var cfgTaintAnalysis = new PHPAnalysis.Analysis.CFG.TaintAnalysis(blockAnalyzer, condAnalyser, varStorage);
var analyzer = new CFGTraverser(new ForwardTraversal(), cfgTaintAnalysis, new ReversePostOrderWorkList(fileToAnalyze.CFG));
analyzer.Analyze(fileToAnalyze.CFG);
return cfgTaintAnalysis.Taints[fileToAnalyze.CFG.Vertices.Single(block => block.IsLeaf)].Out[EdgeType.Normal];
};
foreach (var file in parsedFiles)
{
var inclusionResolver = new IncludeResolver(parsedFiles);
var fileStack = new Stack<File>();
fileStack.Push(file);
var immutableInitialTaint = new DefaultTaintProvider().GetTaint();
var stacks = new AnalysisStacks(fileStack);
fileTaintAnalyzer(immutableInitialTaint, inclusionResolver, AnalysisScope.File, stacks);
}
vulnStorage.Verify(x => x.AddVulnerability(It.IsAny<IVulnerabilityInfo>()), Times.Exactly(numberOfVulns));
}
private static ImmutableVariableStorage GetDefaultTaint()
{
var defaultTaint = new DefaultTaintProvider().GetTaint();
if (_components.TaintProviders.Count == 1)
{
return _components.TaintProviders.Single().GetTaint();
}
if (_components.TaintProviders.Count > 1)
{
Console.WriteLine("Found multiple taint providers. Can't decide which one to use. Using builtin default taint.");
}
return defaultTaint;
}
