/// <summary>
/// Convert values to string representation and concatenate them.
/// </summary>
/// <param name="leftOperand">The left operand of concatenation.</param>
/// <param name="rightOperand">The right operand of concatenation.</param>
/// <returns>Concatenated string of both operands.</returns>
public Value EvaluateConcatenation(Value leftOperand, Value rightOperand)
{
// Gets type of left operand and convert to string
leftOperand.Accept(this);
var leftString = result;
// Gets type of right operand and convert to string
rightOperand.Accept(this);
// Get all flags from both operands if they are tainted
var flags = FlagsHandler.GetFlagsFromValues(leftOperand, rightOperand);
var flagInfo = new Flags(flags);
// Check whether it is concrete or abstract value
Value taintedResult;
if ((leftString != null) && (result != null))
{
taintedResult = OutSet.CreateString(string.Concat(leftString.Value, result.Value));
}
else
{
taintedResult = OutSet.AnyStringValue;
}
return(taintedResult.SetInfo(flagInfo));
}
/// <summary>
/// Convert all possible values to string representation and concatenate every combination of them.
/// </summary>
/// <param name="leftOperand">The left operand of concatenation.</param>
/// <param name="rightOperand">The right operand of concatenation.</param>
/// <returns>All string resulting from the combination of left and right operand values.</returns>
public MemoryEntry EvaluateConcatenation(MemoryEntry leftOperand, MemoryEntry rightOperand)
{
var values = new HashSet <Value>();
AnyStringValue leftAnyString;
var leftStrings = Evaluate(leftOperand, out leftAnyString);
AnyStringValue rightAnyString;
var rightStrings = Evaluate(rightOperand, out rightAnyString);
if ((leftAnyString != null) || (rightAnyString != null))
{
// Get all flags from both abstract operands if they are tainted
Dictionary <FlagType, bool> flags;
if (leftAnyString != null)
{
if (rightAnyString != null)
{
flags = FlagsHandler.GetFlagsFromValues(leftAnyString, rightAnyString);
}
else
{
flags = FlagsHandler.GetFlagsFromValues(leftAnyString);
}
}
else
{
flags = FlagsHandler.GetFlagsFromValues(rightAnyString);
}
var flagInfo = new Flags(flags);
values.Add(OutSet.AnyStringValue.SetInfo(flagInfo));
}
foreach (var leftValue in leftStrings)
{
foreach (var rightValue in rightStrings)
{
// Get all flags from all combinations of both operands if they are tainted
var taintedResult = OutSet.CreateString(string.Concat(leftValue.Value,
rightValue.Value));
if ((leftValue.GetInfo <Flags>() != null) || (rightValue.GetInfo <Flags>() != null))
{
var flags = FlagsHandler.GetFlagsFromValues(leftValue, rightValue);
var flagInfo = new Flags(flags);
values.Add(taintedResult.SetInfo(flagInfo));
}
else
{
values.Add(taintedResult);
}
}
}
return(new MemoryEntry(values));
}
/// <inheritdoc />
protected override void flowThrough()
{
PrepareArguments();
if (ThisObj == null)
{
Flow.CalledObject = new MemoryEntry(OutSet.CreateString(StaticMethodCall.ClassName.QualifiedName.Name.LowercaseValue));
Services.FunctionResolver.IndirectStaticMethodCall(StaticMethodCall.ClassName.QualifiedName,
Name.Value.ReadMemory(OutSnapshot), Flow.Arguments);
}
else
{
Services.FunctionResolver.IndirectStaticMethodCall(ThisObj.Value,
Name.Value.ReadMemory(OutSnapshot), Flow.Arguments);
}
}
/// <inheritdoc />
protected override void flowThrough()
{
switch (_partial.Type)
{
case PseudoConstUse.Types.Line:
Value = OutSet.CreateSnapshotEntry(new MemoryEntry(OutSet.CreateInt(_partial.Position.FirstLine)));
return;
case PseudoConstUse.Types.File:
Value = OutSet.CreateSnapshotEntry(new MemoryEntry(OutSet.CreateString(OwningScriptFullName)));
return;
case PseudoConstUse.Types.Dir:
Value = OutSet.CreateSnapshotEntry(new MemoryEntry(OutSet.CreateString(OwningScript.Directory.FullName)));
return;
case PseudoConstUse.Types.Function:
if (OwningPPGraph.FunctionName == null)
{
Value = OutSet.CreateSnapshotEntry(new MemoryEntry(OutSet.UndefinedValue));
}
else
{
Value = OutSet.CreateSnapshotEntry(new MemoryEntry(OutSet.CreateString(OwningPPGraph.FunctionName)));
}
return;
case PseudoConstUse.Types.Method:
case PseudoConstUse.Types.Class:
case PseudoConstUse.Types.Namespace:
Value = OutSet.CreateSnapshotEntry(new MemoryEntry(OutSet.AnyStringValue));
return;
default:
Value = OutSet.CreateSnapshotEntry(new MemoryEntry(OutSet.AnyValue));
return;
}
}
/// <summary>
/// Create string representation of given literal
/// </summary>
/// <param name="x">Literal value</param>
/// <returns>Created literal value representation</returns>
public virtual MemoryEntry StringLiteral(StringLiteral x)
{
return(new MemoryEntry(OutSet.CreateString(x.Value as string)));
}
