public ConditionTaintAnalyser(AnalysisScope scope, IIncludeResolver inclusionResolver, Stack <File> includeStack, FunctionsHandler fh)
{
this._analysisScope = scope;
this.includeResolver = inclusionResolver;
this._includeStack = includeStack;
this._funcHandler = fh;
}
public FunctionAndMethodAnalyzer Create(ImmutableVariableStorage variableStorage, IIncludeResolver incResolver,
AnalysisStacks stacks, CustomFunctionHandler customFuncHandler,
IVulnerabilityStorage vulnerabilityStorage)
{
return new FunctionAndMethodAnalyzer(variableStorage, incResolver, stacks, customFuncHandler, vulnerabilityStorage)
{
UseSummaries = this.UseSummaries
};
}
public FunctionAndMethodAnalyzer(ImmutableVariableStorage variableStorage, IIncludeResolver incResolver,
AnalysisStacks stacks, CustomFunctionHandler customFuncHandler,
IVulnerabilityStorage vulnerabilityStorage, FunctionsHandler fh)
{
this._varStorage = variableStorage;
this._incResolver = incResolver;
this._stacks = stacks;
this._customFunctionHandler = customFuncHandler;
this._vulnerabilityStorage = vulnerabilityStorage;
this._funcHandler = fh;
}
/// <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);
blockAnalyzer.AnalysisExtensions.AddRange(AnalysisExtensions);
var condAnalyser = new ConditionTaintAnalyser(AnalysisScope.Function, resolver, stacks.IncludeStack);
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;
}
public TaintBlockAnalyzer(IVulnerabilityStorage vulnerabilityStorage, IIncludeResolver inclusionResolver, AnalysisScope scope,
Func<ImmutableVariableStorage, IIncludeResolver, AnalysisScope, AnalysisStacks, ImmutableVariableStorage> analyzeTaint,
AnalysisStacks stacks, FunctionAndMethodAnalyzerFactory subroutineAnalyzerFactory)
: this()
{
Preconditions.NotNull(vulnerabilityStorage, "vulnerabilityStorage");
Preconditions.NotNull(inclusionResolver, "inclusionResolver");
Preconditions.NotNull(analyzeTaint, "analyzeTaint");
Preconditions.NotNull(stacks, "stacks");
Preconditions.NotNull(subroutineAnalyzerFactory, "subroutineAnalyzerFactory");
this._vulnerabilityStorage = vulnerabilityStorage;
this._inclusionResolver = inclusionResolver;
this._analyzer = analyzeTaint;
this._analysisScope = scope;
this.ReturnInfos = new List<ExpressionInfo>();
this._analysisStacks = stacks;
this._subroutineAnalyzerFactory = subroutineAnalyzerFactory;
}
/// <summary>
/// Resolves wrapper for given scheme.
/// </summary>
public bool TryResolveSchemeIncluder(string scheme, out IIncludeResolver resolver)
{
return(_resolvers.TryGetValue(scheme, out resolver));
}
/// <summary>
/// Registers inclusion handler for paths prefixed with given scheme.
/// </summary>
public void RegisterSchemeIncluder(string scheme, IIncludeResolver resolver)
{
Debug.Assert(!string.IsNullOrEmpty(scheme));
_resolvers.Add(scheme, resolver ?? throw new ArgumentNullException(nameof(resolver)));
}
public FunctionAndMethodAnalyzer Create(ImmutableVariableStorage variableStorage, IIncludeResolver incResolver,
AnalysisStacks stacks, CustomFunctionHandler customFuncHandler,
IVulnerabilityStorage vulnerabilityStorage, FunctionsHandler fh)
{
return(new FunctionAndMethodAnalyzer(variableStorage, incResolver, stacks, customFuncHandler, vulnerabilityStorage, fh)
{
UseSummaries = this.UseSummaries
});
}
public ConditionTaintAnalyser(AnalysisScope scope, IIncludeResolver inclusionResolver, Stack<File> includeStack)
{
this._analysisScope = scope;
this.includeResolver = inclusionResolver;
this._includeStack = includeStack;
}
/// <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);
}
