/// <summary>
/// Construct a PositionTranslator.
/// </summary>
/// <param name="randomInts">Random integers used in translation</param>
public PositionTranslator(CryptoStreamDef streamType, UInt32[] randomInts)
{
if (randomInts == null)
{
throw new ArgumentNullException();
}
if (randomInts.Length != 5)
{
throw new Exception("Integer array must have a length of 5");
}
_randomInts = randomInts;
_streamType = streamType;
}
/// <summary>
/// Try and find the type used for crypto streams.
/// </summary>
/// <returns>Crypto stream TypeDef, or null if none found</returns>
public CryptoStreamDef FindCryptoStreamType()
{
foreach (var typeDef in this.Module.Types.Where(type =>
type.BaseType != null &&
type.BaseType.FullName.Equals(typeof(System.IO.Stream).FullName)))
{
if (CryptoStreamDefV2.Is(typeDef))
{
return(new CryptoStreamDefV2(typeDef));
}
else if (CryptoStreamDef.Is(typeDef))
{
return(new CryptoStreamDef(typeDef));
}
}
return(null);
}
/// <summary>
/// Try and find the type used for crypto streams.
/// </summary>
/// <returns>Crypto stream TypeDef, or null if none found</returns>
public CryptoStreamDef FindCryptoStreamType()
{
foreach (TypeDef type in Module.Types)
{
if (!type.HasMethods)
{
continue;
}
foreach (MethodDef method in type.Methods)
{
if (!method.HasBody || !method.Body.HasInstructions)
{
continue;
}
foreach (Instruction instruction in method.Body.Instructions)
{
if (instruction.OpCode == OpCodes.Callvirt && ((IMethod)instruction.Operand).Name == "get_CanRead")
{
return(new CryptoStreamDefV2(type));
}
}
}
}
foreach (var typeDef in this.Module.Types.Where(type =>
type.BaseType != null &&
type.BaseType.FullName.Equals(typeof(System.IO.Stream).FullName)))
{
if (CryptoStreamDefV2.Is(typeDef))
{
return(new CryptoStreamDefV2(typeDef));
}
else if (CryptoStreamDef.Is(typeDef))
{
return(new CryptoStreamDef(typeDef));
}
}
return(null);
}
/// <summary>
/// Try and find the type used for crypto streams.
/// </summary>
/// <returns>Crypto stream TypeDef, or null if none found</returns>
public CryptoStreamDef FindCryptoStreamType()
{
var typeDef = this.Module.Types.FirstOrDefault(type =>
type.BaseType != null &&
type.BaseType.FullName.Equals(typeof(System.IO.Stream).FullName));
if (typeDef == null)
{
return(null);
}
if (CryptoStreamDefV2.Is(typeDef))
{
return(new CryptoStreamDefV2(typeDef));
}
else if (CryptoStreamDef.Is(typeDef))
{
return(new CryptoStreamDef(typeDef));
}
else
{
return(null);
}
}
/// <summary>
/// Construct a PositionTranslator with the default random integers.
/// </summary>
/// <param name="streamType">Crypto stream type definition</param>
public PositionTranslator(CryptoStreamDef streamType)
: this(streamType, DefaultPseudoRandomInts)
{
}