Exemple #1
0
        public override void Initialize(AnalysisContext context)
        {
            context.EnableConcurrentExecution();
            context.ConfigureGeneratedCodeAnalysis(GeneratedCodeAnalysisFlags.Analyze | GeneratedCodeAnalysisFlags.ReportDiagnostics);

            context.RegisterCompilationStartAction(
                (CompilationStartAnalysisContext compilationContext) =>
            {
                Compilation compilation             = compilationContext.Compilation;
                TaintedDataConfig taintedDataConfig = TaintedDataConfig.GetOrCreate(compilation);
                TaintedDataSymbolMap <SourceInfo> sourceInfoSymbolMap = taintedDataConfig.GetSourceSymbolMap(this.SinkKind);
                if (sourceInfoSymbolMap.IsEmpty)
                {
                    return;
                }

                TaintedDataSymbolMap <SinkInfo> sinkInfoSymbolMap = taintedDataConfig.GetSinkSymbolMap(this.SinkKind);
                if (sinkInfoSymbolMap.IsEmpty)
                {
                    return;
                }

                compilationContext.RegisterOperationBlockStartAction(
                    operationBlockStartContext =>
                {
                    ISymbol owningSymbol                = operationBlockStartContext.OwningSymbol;
                    AnalyzerOptions options             = operationBlockStartContext.Options;
                    CancellationToken cancellationToken = operationBlockStartContext.CancellationToken;
                    if (options.IsConfiguredToSkipAnalysis(TaintedDataEnteringSinkDescriptor, owningSymbol, compilation))
                    {
                        return;
                    }

                    WellKnownTypeProvider wellKnownTypeProvider      = WellKnownTypeProvider.GetOrCreate(compilation);
                    Lazy <ControlFlowGraph?> controlFlowGraphFactory = new Lazy <ControlFlowGraph?>(
                        () => operationBlockStartContext.OperationBlocks.GetControlFlowGraph());
                    Lazy <PointsToAnalysisResult?> pointsToFactory = new Lazy <PointsToAnalysisResult?>(
                        () =>
                    {
                        if (controlFlowGraphFactory.Value == null)
                        {
                            return(null);
                        }

                        InterproceduralAnalysisConfiguration interproceduralAnalysisConfiguration = InterproceduralAnalysisConfiguration.Create(
                            options,
                            SupportedDiagnostics,
                            controlFlowGraphFactory.Value,
                            operationBlockStartContext.Compilation,
                            defaultInterproceduralAnalysisKind: InterproceduralAnalysisKind.ContextSensitive);
                        return(PointsToAnalysis.TryGetOrComputeResult(
                                   controlFlowGraphFactory.Value,
                                   owningSymbol,
                                   options,
                                   wellKnownTypeProvider,
                                   PointsToAnalysisKind.Complete,
                                   interproceduralAnalysisConfiguration,
                                   interproceduralAnalysisPredicate: null));
                    });
                    Lazy <(PointsToAnalysisResult?, ValueContentAnalysisResult?)> valueContentFactory = new Lazy <(PointsToAnalysisResult?, ValueContentAnalysisResult?)>(
                        () =>
                    {
                        if (controlFlowGraphFactory.Value == null)
                        {
                            return(null, null);
                        }

                        InterproceduralAnalysisConfiguration interproceduralAnalysisConfiguration = InterproceduralAnalysisConfiguration.Create(
                            options,
                            SupportedDiagnostics,
                            controlFlowGraphFactory.Value,
                            operationBlockStartContext.Compilation,
                            defaultInterproceduralAnalysisKind: InterproceduralAnalysisKind.ContextSensitive);
                        ValueContentAnalysisResult?valuecontentAnalysisResult = ValueContentAnalysis.TryGetOrComputeResult(
                            controlFlowGraphFactory.Value,
                            owningSymbol,
                            options,
                            wellKnownTypeProvider,
                            PointsToAnalysisKind.Complete,
                            interproceduralAnalysisConfiguration,
                            out _,
                            out PointsToAnalysisResult? p);

                        return(p, valuecontentAnalysisResult);
                    });

                    PooledHashSet <IOperation> rootOperationsNeedingAnalysis = PooledHashSet <IOperation> .GetInstance();

                    operationBlockStartContext.RegisterOperationAction(
                        operationAnalysisContext =>
                    {
                        IPropertyReferenceOperation propertyReferenceOperation = (IPropertyReferenceOperation)operationAnalysisContext.Operation;
                        if (sourceInfoSymbolMap.IsSourceProperty(propertyReferenceOperation.Property))
                        {
                            lock (rootOperationsNeedingAnalysis)
                            {
                                rootOperationsNeedingAnalysis.Add(propertyReferenceOperation.GetRoot());
                            }
                        }
                    },
                        OperationKind.PropertyReference);

                    if (sourceInfoSymbolMap.RequiresParameterReferenceAnalysis)
                    {
                        operationBlockStartContext.RegisterOperationAction(
                            operationAnalysisContext =>
                        {
                            IParameterReferenceOperation parameterReferenceOperation = (IParameterReferenceOperation)operationAnalysisContext.Operation;
                            if (sourceInfoSymbolMap.IsSourceParameter(parameterReferenceOperation.Parameter, wellKnownTypeProvider))
                            {
                                lock (rootOperationsNeedingAnalysis)
                                {
                                    rootOperationsNeedingAnalysis.Add(parameterReferenceOperation.GetRoot());
                                }
                            }
                        },
                            OperationKind.ParameterReference);
                    }

                    operationBlockStartContext.RegisterOperationAction(
                        operationAnalysisContext =>
                    {
                        IInvocationOperation invocationOperation = (IInvocationOperation)operationAnalysisContext.Operation;
                        if (sourceInfoSymbolMap.IsSourceMethod(
                                invocationOperation.TargetMethod,
                                invocationOperation.Arguments,
                                pointsToFactory,
                                valueContentFactory,
                                out _))
                        {
                            lock (rootOperationsNeedingAnalysis)
                            {
                                rootOperationsNeedingAnalysis.Add(invocationOperation.GetRoot());
                            }
                        }
                    },
                        OperationKind.Invocation);

                    if (TaintedDataConfig.HasTaintArraySource(SinkKind))
                    {
                        operationBlockStartContext.RegisterOperationAction(
                            operationAnalysisContext =>
                        {
                            IArrayInitializerOperation arrayInitializerOperation = (IArrayInitializerOperation)operationAnalysisContext.Operation;
                            if (arrayInitializerOperation.GetAncestor <IArrayCreationOperation>(OperationKind.ArrayCreation)?.Type is IArrayTypeSymbol arrayTypeSymbol &&
                                sourceInfoSymbolMap.IsSourceConstantArrayOfType(arrayTypeSymbol, arrayInitializerOperation))
                            {
                                lock (rootOperationsNeedingAnalysis)
                                {
                                    rootOperationsNeedingAnalysis.Add(operationAnalysisContext.Operation.GetRoot());
                                }
                            }
                        },
                            OperationKind.ArrayInitializer);
                    }

                    operationBlockStartContext.RegisterOperationBlockEndAction(
                        operationBlockAnalysisContext =>
                    {
                        try
                        {
                            lock (rootOperationsNeedingAnalysis)
                            {
                                if (!rootOperationsNeedingAnalysis.Any())
                                {
                                    return;
                                }

                                if (controlFlowGraphFactory.Value == null)
                                {
                                    return;
                                }

                                foreach (IOperation rootOperation in rootOperationsNeedingAnalysis)
                                {
                                    TaintedDataAnalysisResult?taintedDataAnalysisResult = TaintedDataAnalysis.TryGetOrComputeResult(
                                        controlFlowGraphFactory.Value,
                                        operationBlockAnalysisContext.Compilation,
                                        operationBlockAnalysisContext.OwningSymbol,
                                        operationBlockAnalysisContext.Options,
                                        TaintedDataEnteringSinkDescriptor,
                                        sourceInfoSymbolMap,
                                        taintedDataConfig.GetSanitizerSymbolMap(this.SinkKind),
                                        sinkInfoSymbolMap);
                                    if (taintedDataAnalysisResult == null)
                                    {
                                        return;
                                    }

                                    foreach (TaintedDataSourceSink sourceSink in taintedDataAnalysisResult.TaintedDataSourceSinks)
                                    {
                                        if (!sourceSink.SinkKinds.Contains(this.SinkKind))
                                        {
                                            continue;
                                        }

                                        foreach (SymbolAccess sourceOrigin in sourceSink.SourceOrigins)
                                        {
                                            // Something like:
                                            // CA3001: Potential SQL injection vulnerability was found where '{0}' in method '{1}' may be tainted by user-controlled data from '{2}' in method '{3}'.
                                            Diagnostic diagnostic = Diagnostic.Create(
                                                this.TaintedDataEnteringSinkDescriptor,
                                                sourceSink.Sink.Location,
                                                additionalLocations: new Location[] { sourceOrigin.Location },
                                                messageArgs: new object[] {
                                                sourceSink.Sink.Symbol.ToDisplayString(SymbolDisplayFormat.MinimallyQualifiedFormat),
                                                sourceSink.Sink.AccessingMethod.ToDisplayString(SymbolDisplayFormat.MinimallyQualifiedFormat),
                                                sourceOrigin.Symbol.ToDisplayString(SymbolDisplayFormat.MinimallyQualifiedFormat),
                                                sourceOrigin.AccessingMethod.ToDisplayString(SymbolDisplayFormat.MinimallyQualifiedFormat)
                                            });
                                            operationBlockAnalysisContext.ReportDiagnostic(diagnostic);
                                        }
                                    }
                                }
                            }
                        }
                        finally
                        {
                            rootOperationsNeedingAnalysis.Free(compilationContext.CancellationToken);
                        }
                    });
                });
            });
        }
Exemple #2
0
        public sealed override void Initialize(AnalysisContext context)
        {
            ImmutableHashSet <string> cachedDeserializationMethodNames = this.DeserializationMethodNames;

            Debug.Assert(!String.IsNullOrWhiteSpace(this.DeserializerTypeMetadataName));
            Debug.Assert(!String.IsNullOrWhiteSpace(this.SerializationBinderPropertyMetadataName));
            Debug.Assert(cachedDeserializationMethodNames != null);
            Debug.Assert(!cachedDeserializationMethodNames.IsEmpty);
            Debug.Assert(this.BinderDefinitelyNotSetDescriptor != null);
            Debug.Assert(this.BinderMaybeNotSetDescriptor != null);

            context.EnableConcurrentExecution();

            // Security analyzer - analyze and report diagnostics on generated code.
            context.ConfigureGeneratedCodeAnalysis(GeneratedCodeAnalysisFlags.Analyze | GeneratedCodeAnalysisFlags.ReportDiagnostics);

            // For PropertySetAnalysis dataflow analysis.
            PropertyMapperCollection propertyMappers = new PropertyMapperCollection(
                new PropertyMapper(
                    this.SerializationBinderPropertyMetadataName,
                    (NullAbstractValue nullAbstractValue) =>
            {
                // A null SerializationBinder is what we want to flag as hazardous.
                switch (nullAbstractValue)
                {
                case NullAbstractValue.Null:
                    return(PropertySetAbstractValueKind.Flagged);

                case NullAbstractValue.NotNull:
                    return(PropertySetAbstractValueKind.Unflagged);

                default:
                    return(PropertySetAbstractValueKind.MaybeFlagged);
                }
            }));

            HazardousUsageEvaluatorCollection hazardousUsageEvaluators =
                new HazardousUsageEvaluatorCollection(
                    cachedDeserializationMethodNames.Select(
                        methodName => new HazardousUsageEvaluator(methodName, DoNotUseInsecureDeserializerWithoutBinderBase.HazardousIfNull)));

            context.RegisterCompilationStartAction(
                (CompilationStartAnalysisContext compilationStartAnalysisContext) =>
            {
                WellKnownTypeProvider wellKnownTypeProvider =
                    WellKnownTypeProvider.GetOrCreate(compilationStartAnalysisContext.Compilation);

                if (!wellKnownTypeProvider.TryGetTypeByMetadataName(
                        this.DeserializerTypeMetadataName,
                        out INamedTypeSymbol deserializerTypeSymbol))
                {
                    return;
                }

                compilationStartAnalysisContext.RegisterOperationBlockStartAction(
                    (OperationBlockStartAnalysisContext operationBlockStartAnalysisContext) =>
                {
                    PooledHashSet <IOperation> rootOperationsNeedingAnalysis = PooledHashSet <IOperation> .GetInstance();

                    operationBlockStartAnalysisContext.RegisterOperationAction(
                        (OperationAnalysisContext operationAnalysisContext) =>
                    {
                        IInvocationOperation invocationOperation =
                            (IInvocationOperation)operationAnalysisContext.Operation;
                        if (invocationOperation.Instance?.Type == deserializerTypeSymbol &&
                            cachedDeserializationMethodNames.Contains(invocationOperation.TargetMethod.Name))
                        {
                            lock (rootOperationsNeedingAnalysis)
                            {
                                rootOperationsNeedingAnalysis.Add(operationAnalysisContext.Operation.GetRoot());
                            }
                        }
                    },
                        OperationKind.Invocation);

                    operationBlockStartAnalysisContext.RegisterOperationAction(
                        (OperationAnalysisContext operationAnalysisContext) =>
                    {
                        IMethodReferenceOperation methodReferenceOperation =
                            (IMethodReferenceOperation)operationAnalysisContext.Operation;
                        if (methodReferenceOperation.Instance?.Type == deserializerTypeSymbol &&
                            cachedDeserializationMethodNames.Contains(
                                methodReferenceOperation.Method.MetadataName))
                        {
                            lock (rootOperationsNeedingAnalysis)
                            {
                                rootOperationsNeedingAnalysis.Add(operationAnalysisContext.Operation.GetRoot());
                            }
                        }
                    },
                        OperationKind.MethodReference);

                    operationBlockStartAnalysisContext.RegisterOperationBlockEndAction(
                        (OperationBlockAnalysisContext operationBlockAnalysisContext) =>
                    {
                        PooledDictionary <(Location Location, IMethodSymbol Method), HazardousUsageEvaluationResult> allResults = null;
                        try
                        {
                            lock (rootOperationsNeedingAnalysis)
                            {
                                if (!rootOperationsNeedingAnalysis.Any())
                                {
                                    return;
                                }

                                // Only instantiated if there are any results to report.
                                List <ControlFlowGraph> cfgs = new List <ControlFlowGraph>();

                                var interproceduralAnalysisConfig = InterproceduralAnalysisConfiguration.Create(
                                    operationBlockAnalysisContext.Options, SupportedDiagnostics,
                                    defaultInterproceduralAnalysisKind: InterproceduralAnalysisKind.None,
                                    cancellationToken: operationBlockAnalysisContext.CancellationToken,
                                    defaultMaxInterproceduralMethodCallChain: 1);             // By default, we only want to track method calls one level down.

                                foreach (IOperation rootOperation in rootOperationsNeedingAnalysis)
                                {
                                    ImmutableDictionary <(Location Location, IMethodSymbol Method), HazardousUsageEvaluationResult> dfaResult =
                                        PropertySetAnalysis.GetOrComputeHazardousUsages(
                                            rootOperation.GetEnclosingControlFlowGraph(),
                                            operationBlockAnalysisContext.Compilation,
                                            operationBlockAnalysisContext.OwningSymbol,
                                            this.DeserializerTypeMetadataName,
                                            DoNotUseInsecureDeserializerWithoutBinderBase.ConstructorMapper,
                                            propertyMappers,
                                            hazardousUsageEvaluators,
                                            interproceduralAnalysisConfig);
                                    if (dfaResult.IsEmpty)
                                    {
                                        continue;
                                    }

                                    if (allResults == null)
                                    {
                                        allResults = PooledDictionary <(Location Location, IMethodSymbol Method), HazardousUsageEvaluationResult> .GetInstance();
                                    }

                                    foreach (KeyValuePair <(Location Location, IMethodSymbol Method), HazardousUsageEvaluationResult> kvp
                                             in dfaResult)
                                    {
                                        allResults.Add(kvp.Key, kvp.Value);
                                    }
                                }
                            }

                            if (allResults == null)
                            {
                                return;
                            }

                            foreach (KeyValuePair <(Location Location, IMethodSymbol Method), HazardousUsageEvaluationResult> kvp
                                     in allResults)
                            {
                                DiagnosticDescriptor descriptor;
                                switch (kvp.Value)
                                {
                                case HazardousUsageEvaluationResult.Flagged:
                                    descriptor = this.BinderDefinitelyNotSetDescriptor;
                                    break;

                                case HazardousUsageEvaluationResult.MaybeFlagged:
                                    descriptor = this.BinderMaybeNotSetDescriptor;
                                    break;

                                default:
                                    Debug.Fail($"Unhandled result value {kvp.Value}");
                                    continue;
                                }

                                operationBlockAnalysisContext.ReportDiagnostic(
                                    Diagnostic.Create(
                                        descriptor,
                                        kvp.Key.Location,
                                        kvp.Key.Method.ToDisplayString(
                                            SymbolDisplayFormat.MinimallyQualifiedFormat)));
                            }
                        }
                        finally
                        {
                            rootOperationsNeedingAnalysis.Free();
                            allResults?.Free();
                        }
                    });
                });
            });
        }
Exemple #3
0
        public override void Initialize(AnalysisContext context)
        {
            context.EnableConcurrentExecution();
            context.ConfigureGeneratedCodeAnalysis(GeneratedCodeAnalysisFlags.Analyze | GeneratedCodeAnalysisFlags.ReportDiagnostics);

            context.RegisterCompilationStartAction(
                (CompilationStartAnalysisContext compilationContext) =>
            {
                TaintedDataConfig taintedDataConfig = TaintedDataConfig.GetOrCreate(compilationContext.Compilation);
                TaintedDataSymbolMap <SourceInfo> sourceInfoSymbolMap = taintedDataConfig.GetSourceSymbolMap(this.SinkKind);
                if (sourceInfoSymbolMap.IsEmpty)
                {
                    return;
                }

                TaintedDataSymbolMap <SinkInfo> sinkInfoSymbolMap = taintedDataConfig.GetSinkSymbolMap(this.SinkKind);
                if (sinkInfoSymbolMap.IsEmpty)
                {
                    return;
                }

                compilationContext.RegisterOperationBlockStartAction(
                    operationBlockStartContext =>
                {
                    ISymbol owningSymbol = operationBlockStartContext.OwningSymbol;
                    if (owningSymbol.IsConfiguredToSkipAnalysis(operationBlockStartContext.Options,
                                                                TaintedDataEnteringSinkDescriptor, operationBlockStartContext.Compilation, operationBlockStartContext.CancellationToken))
                    {
                        return;
                    }

                    PooledHashSet <IOperation> rootOperationsNeedingAnalysis = PooledHashSet <IOperation> .GetInstance();

                    operationBlockStartContext.RegisterOperationAction(
                        operationAnalysisContext =>
                    {
                        IPropertyReferenceOperation propertyReferenceOperation = (IPropertyReferenceOperation)operationAnalysisContext.Operation;
                        IOperation rootOperation = operationAnalysisContext.Operation.GetRoot();
                        if (sourceInfoSymbolMap.IsSourceProperty(propertyReferenceOperation.Property))
                        {
                            lock (rootOperationsNeedingAnalysis)
                            {
                                rootOperationsNeedingAnalysis.Add(rootOperation);
                            }
                        }
                    },
                        OperationKind.PropertyReference);

                    operationBlockStartContext.RegisterOperationAction(
                        operationAnalysisContext =>
                    {
                        IInvocationOperation invocationOperation = (IInvocationOperation)operationAnalysisContext.Operation;
                        IOperation rootOperation = operationAnalysisContext.Operation.GetRoot();
                        PooledDictionary <PointsToCheck, ImmutableHashSet <string> > evaluateWithPointsToAnalysis         = null;
                        PooledDictionary <ValueContentCheck, ImmutableHashSet <string> > evaluateWithValueContentAnalysis = null;
                        PointsToAnalysisResult pointsToAnalysisResult         = null;
                        ValueContentAnalysisResult valueContentAnalysisResult = null;
                        if (rootOperation.TryGetEnclosingControlFlowGraph(out ControlFlowGraph cfg))
                        {
                            pointsToAnalysisResult = PointsToAnalysis.TryGetOrComputeResult(
                                cfg,
                                owningSymbol,
                                operationAnalysisContext.Options,
                                WellKnownTypeProvider.GetOrCreate(operationAnalysisContext.Compilation),
                                InterproceduralAnalysisConfiguration.Create(
                                    operationAnalysisContext.Options,
                                    SupportedDiagnostics,
                                    defaultInterproceduralAnalysisKind: InterproceduralAnalysisKind.ContextSensitive,
                                    cancellationToken: operationAnalysisContext.CancellationToken),
                                interproceduralAnalysisPredicateOpt: null);
                            if (pointsToAnalysisResult == null)
                            {
                                return;
                            }
                        }

                        if (sourceInfoSymbolMap.RequiresValueContentAnalysis)
                        {
                            valueContentAnalysisResult = ValueContentAnalysis.TryGetOrComputeResult(
                                cfg,
                                owningSymbol,
                                operationAnalysisContext.Options,
                                WellKnownTypeProvider.GetOrCreate(operationAnalysisContext.Compilation),
                                InterproceduralAnalysisConfiguration.Create(
                                    operationAnalysisContext.Options,
                                    SupportedDiagnostics,
                                    defaultInterproceduralAnalysisKind: InterproceduralAnalysisKind.ContextSensitive,
                                    cancellationToken: operationAnalysisContext.CancellationToken),
                                out var copyAnalysisResult,
                                out pointsToAnalysisResult);
                            if (valueContentAnalysisResult == null)
                            {
                                return;
                            }
                        }

                        try
                        {
                            if (sourceInfoSymbolMap.IsSourceMethod(
                                    invocationOperation.TargetMethod,
                                    invocationOperation.Arguments,
                                    invocationOperation.Arguments.Select(o => pointsToAnalysisResult[o.Kind, o.Syntax]).ToImmutableArray(),
                                    invocationOperation.Arguments.Select(o => valueContentAnalysisResult[o.Kind, o.Syntax]).ToImmutableArray(),
                                    out _))
                            {
                                lock (rootOperationsNeedingAnalysis)
                                {
                                    rootOperationsNeedingAnalysis.Add(rootOperation);
                                }
                            }
                        }
                        finally
                        {
                            evaluateWithPointsToAnalysis?.Free();
                            evaluateWithValueContentAnalysis?.Free();
                        }
                    },
                        OperationKind.Invocation);

                    if (taintedDataConfig.HasTaintArraySource(SinkKind))
                    {
                        operationBlockStartContext.RegisterOperationAction(
                            operationAnalysisContext =>
                        {
                            IArrayInitializerOperation arrayInitializerOperation = (IArrayInitializerOperation)operationAnalysisContext.Operation;
                            if (arrayInitializerOperation.GetAncestor <IArrayCreationOperation>(OperationKind.ArrayCreation)?.Type is IArrayTypeSymbol arrayTypeSymbol &&
                                sourceInfoSymbolMap.IsSourceConstantArrayOfType(arrayTypeSymbol))
                            {
                                lock (rootOperationsNeedingAnalysis)
                                {
                                    rootOperationsNeedingAnalysis.Add(operationAnalysisContext.Operation.GetRoot());
                                }
                            }
                        },
                            OperationKind.ArrayInitializer);
                    }

                    operationBlockStartContext.RegisterOperationBlockEndAction(
                        operationBlockAnalysisContext =>
                    {
                        try
                        {
                            lock (rootOperationsNeedingAnalysis)
                            {
                                if (!rootOperationsNeedingAnalysis.Any())
                                {
                                    return;
                                }

                                foreach (IOperation rootOperation in rootOperationsNeedingAnalysis)
                                {
                                    if (!rootOperation.TryGetEnclosingControlFlowGraph(out var cfg))
                                    {
                                        continue;
                                    }

                                    TaintedDataAnalysisResult taintedDataAnalysisResult = TaintedDataAnalysis.TryGetOrComputeResult(
                                        cfg,
                                        operationBlockAnalysisContext.Compilation,
                                        operationBlockAnalysisContext.OwningSymbol,
                                        operationBlockAnalysisContext.Options,
                                        TaintedDataEnteringSinkDescriptor,
                                        sourceInfoSymbolMap,
                                        taintedDataConfig.GetSanitizerSymbolMap(this.SinkKind),
                                        sinkInfoSymbolMap,
                                        operationBlockAnalysisContext.CancellationToken);
                                    if (taintedDataAnalysisResult == null)
                                    {
                                        return;
                                    }

                                    foreach (TaintedDataSourceSink sourceSink in taintedDataAnalysisResult.TaintedDataSourceSinks)
                                    {
                                        if (!sourceSink.SinkKinds.Contains(this.SinkKind))
                                        {
                                            continue;
                                        }

                                        foreach (SymbolAccess sourceOrigin in sourceSink.SourceOrigins)
                                        {
                                            // Something like:
                                            // CA3001: Potential SQL injection vulnerability was found where '{0}' in method '{1}' may be tainted by user-controlled data from '{2}' in method '{3}'.
                                            Diagnostic diagnostic = Diagnostic.Create(
                                                this.TaintedDataEnteringSinkDescriptor,
                                                sourceSink.Sink.Location,
                                                additionalLocations: new Location[] { sourceOrigin.Location },
                                                messageArgs: new object[] {
                                                sourceSink.Sink.Symbol.ToDisplayString(SymbolDisplayFormat.MinimallyQualifiedFormat),
                                                sourceSink.Sink.AccessingMethod.ToDisplayString(SymbolDisplayFormat.MinimallyQualifiedFormat),
                                                sourceOrigin.Symbol.ToDisplayString(SymbolDisplayFormat.MinimallyQualifiedFormat),
                                                sourceOrigin.AccessingMethod.ToDisplayString(SymbolDisplayFormat.MinimallyQualifiedFormat)
                                            });
                                            operationBlockAnalysisContext.ReportDiagnostic(diagnostic);
                                        }
                                    }
                                }
                            }
                        }
                        finally
                        {
                            rootOperationsNeedingAnalysis.Free();
                        }
                    });
                });
            });
        }
            public override TaintedDataAbstractValue VisitInvocation_NonLambdaOrDelegateOrLocalFunction(
                IMethodSymbol method,
                IOperation visitedInstance,
                ImmutableArray <IArgumentOperation> visitedArguments,
                bool invokedAsDelegate,
                IOperation originalOperation,
                TaintedDataAbstractValue defaultValue)
            {
                // Always invoke base visit.
                TaintedDataAbstractValue baseVisit = base.VisitInvocation_NonLambdaOrDelegateOrLocalFunction(
                    method,
                    visitedInstance,
                    visitedArguments,
                    invokedAsDelegate,
                    originalOperation,
                    defaultValue);

                IEnumerable <IArgumentOperation> taintedArguments = GetTaintedArguments(visitedArguments);

                if (taintedArguments.Any())
                {
                    ProcessTaintedDataEnteringInvocationOrCreation(method, taintedArguments, originalOperation);
                }

                PooledHashSet <IsInvocationTaintedWithPointsToAnalysis>     evaluateWithPointsToAnalysis     = null;
                PooledHashSet <IsInvocationTaintedWithValueContentAnalysis> evaluateWithValueContentAnalysis = null;

                try
                {
                    if (this.IsSanitizingMethod(method))
                    {
                        return(TaintedDataAbstractValue.NotTainted);
                    }
                    else if (visitedInstance != null && this.IsSanitizingInstanceMethod(method))
                    {
                        if (AnalysisEntityFactory.TryCreate(visitedInstance, out AnalysisEntity analysisEntity))
                        {
                            this.CurrentAnalysisData.SetAbstractValue(analysisEntity, TaintedDataAbstractValue.NotTainted);
                        }

                        return(TaintedDataAbstractValue.NotTainted);
                    }
                    else if (this.DataFlowAnalysisContext.SourceInfos.IsSourceMethod(
                                 method,
                                 out evaluateWithPointsToAnalysis,
                                 out evaluateWithValueContentAnalysis))
                    {
                        ImmutableArray <IArgumentOperation>     argumentOperation          = (originalOperation as IInvocationOperation).Arguments;
                        IEnumerable <PointsToAbstractValue>     pointsToAnalysisResult     = argumentOperation.Select(o => GetPointsToAbstractValue(o.Value));
                        IEnumerable <ValueContentAbstractValue> valueContentAnalysisResult = argumentOperation.Select(o => GetValueContentAbstractValue(o.Value));
                        if ((evaluateWithPointsToAnalysis != null && evaluateWithPointsToAnalysis.Any(o => o(pointsToAnalysisResult))) ||
                            (evaluateWithValueContentAnalysis != null && evaluateWithValueContentAnalysis.Any(o => o(pointsToAnalysisResult, valueContentAnalysisResult))))
                        {
                            return(TaintedDataAbstractValue.CreateTainted(method, originalOperation.Syntax, this.OwningSymbol));
                        }

                        return(TaintedDataAbstractValue.NotTainted);
                    }
                }
                finally
                {
                    if (evaluateWithPointsToAnalysis != null)
                    {
                        evaluateWithPointsToAnalysis.Free();
                    }

                    if (evaluateWithValueContentAnalysis != null)
                    {
                        evaluateWithValueContentAnalysis.Free();
                    }
                }

                return(baseVisit);
            }