static private MethodBodyInfo FindBody(Abc46 abc, U30 methodIndex)
{
SwfLibrary.Abc.MethodInfo methodInfo = (SwfLibrary.Abc.MethodInfo)abc.Methods[(int)methodIndex];
MethodBodyInfo methodBody = null;
for (int i = 0, n = abc.MethodBodies.Count; i < n; ++i)
{
methodBody = (MethodBodyInfo)abc.MethodBodies[i];
if (methodBody.Method.Value == methodIndex.Value)
{
break;
}
}
return(methodBody);
}
public void ReadExternal(BinaryReader input)
{
#region frame
char chr;
_name = "";
while ((chr = (char)input.ReadByte()) != 0)
{
_name += chr;
}
#endregion
#region version
_minor = input.ReadUInt16();
_major = input.ReadUInt16();
if (_major > VERSION_MAJOR)
{
throw new Exception(String.Format("Unsupported .abc format {0}.{1}.", MajorVersion, MinorVersion));
}
#endregion
#region cpool_info
_cpool = new ConstantPool();
_cpool.ReadExternal(input);
#endregion
#region method_info
uint n = Primitives.ReadU30(input).Value;
_methods = new ArrayList(Capacity.Max(n));
for (uint i = 0; i < n; ++i)
{
MethodInfo method = new MethodInfo();
method.ReadExternal(input);
_methods.Add(method);
}
#endregion
#region metadata_info
n = Primitives.ReadU30(input).Value;
_metadata = new ArrayList(Capacity.Max(n));
for (uint i = 0; i < n; ++i)
{
MetadataInfo metadata = new MetadataInfo();
metadata.ReadExternal(input);
_metadata.Add(metadata);
}
#endregion
#region instance_info
n = Primitives.ReadU30(input).Value;
_instanceInfo = new ArrayList(Capacity.Max(n));
for (uint i = 0; i < n; ++i)
{
InstanceInfo instanceInfo = new InstanceInfo();
instanceInfo.ReadExternal(input);
_instanceInfo.Add(instanceInfo);
}
#endregion
#region class_info
//n is same as for instance_info
_classInfo = new ArrayList(Capacity.Max(n));
for (uint i = 0; i < n; ++i)
{
ClassInfo classInfo = new ClassInfo();
classInfo.ReadExternal(input);
_classInfo.Add(classInfo);
}
#endregion
#region script_info
n = Primitives.ReadU30(input).Value;
_scriptInfo = new ArrayList(Capacity.Max(n));
for (uint i = 0; i < n; ++i)
{
ScriptInfo scriptInfo = new ScriptInfo();
scriptInfo.ReadExternal(input);
_scriptInfo.Add(scriptInfo);
}
#endregion
#region method_body_info
n = Primitives.ReadU30(input).Value;
_methodBodyInfo = new ArrayList(Capacity.Max(n));
for (uint i = 0; i < n; ++i)
{
MethodBodyInfo methodBodyInfo = new MethodBodyInfo();
methodBodyInfo.ReadExternal(input);
_methodBodyInfo.Add(methodBodyInfo);
}
#endregion
}
static void Main(string[] args)
{
#if DEBUG
DateTime start = DateTime.Now;
#endif
try
{
#region Initialization
try
{
bool hasMethod = false;
if (args.Length < 1)
{
WriteInfo();
Console.WriteLine("[?] Use -help for some instructions.");
return;
}
for (int i = 0, n = args.Length; i < n; ++i)
{
switch (args[i])
{
case "-h":
case "-help":
case "-?":
case "/?":
case "/help":
WriteInfo();
Usage();
return;
// OPTIONS /////////////////////////////////////////////////////////////////////
case "-o":
case "-output":
_pathOutput = args[++i];
break;
case "-q":
case "-quiet":
_isQuiet = true;
break;
// REPLACE ////////////////////////////////////////////////////////////////////
case "-r":
case "-replace":
_action = Action.Replace;
break;
// REPLACE PROPERTIES ////////////////////////////////////////////////////////
case "-sm":
case "-static-method":
if (hasMethod)
{
throw new Exception("Two methods defined.");
}
_isMethodStatic = true;
_methodName = args[++i];
break;
case "-m":
case "-method":
if (hasMethod)
{
throw new Exception("Two methods defined.");
}
_isMethodStatic = false;
_methodName = args[++i];
break;
case "-co":
case "-constructor":
if (hasMethod)
{
throw new Exception("Two methods defined.");
}
_isConstructor = true;
_isMethodStatic = false;
break;
case "-sc":
case "-static-constructor":
if (hasMethod)
{
throw new Exception("Two methods defined.");
}
_isConstructor = true;
_isMethodStatic = true;
break;
case "-c":
case "-class":
_className = args[++i];
break;
case "-n":
case "-namespace":
_namespace = args[++i];
break;
// INLINE ///////////////////////////////////////////////////////////////////
case "-i":
case "-inline":
_action = Action.Inline;
_pathSwf = args[++i];
break;
// PATCH ///////////////////////////////////////////////////////////////////
case "-optimize":
_action = Action.Optimize;
_pathSwf = args[++i];
break;
// DASM ////////////////////////////////////////////////////////////////////
case "-d":
case "-dasm":
_action = Action.Dasm;
break;
// DASM PROPERTIES ////////////////////////////////////////////////////////
case "-a":
case "-as3c":
_dasmType = Dasm.As3c;
break;
case "-p":
case "-plain":
_dasmType = Dasm.Plain;
break;
default:
if (File.Exists(args[i]))
{
try
{
BinaryReader fileHead = new BinaryReader(File.Open(args[i], FileMode.Open, FileAccess.Read));
if (fileHead.BaseStream.Length < 3)
{
throw new Exception("Invalid file given.");
}
byte[] head = fileHead.ReadBytes(3);
fileHead.Close();
//TODO fix this ugly part...
if ((head[0] == (byte)'C' || head[0] == (byte)'F') && head[1] == (byte)'W' && head[2] == (byte)'S')
{
if (_pathSwf != "")
{
throw new Exception("Two SWF files given.");
}
_pathSwf = args[i];
}
else
{
if ("" != _pathAsm)
{
throw new Exception("Two ASM files given.");
}
_pathAsm = args[i];
}
}
catch (IOException io)
{
WriteInfo();
Console.Error.WriteLine("[-] Error: Can not open file {0}", args[i]);
#if DEBUG
Console.Error.WriteLine("[-] {0}", io.Message);
#endif
return;
}
catch (Exception e)
{
WriteInfo();
Console.Error.WriteLine("[-] Error: {0}", e.Message);
#if DEBUG
Console.Error.WriteLine("[-] {0}", e.StackTrace);
#endif
return;
}
}
else
{
if (args[i].IndexOf(".") != -1)
{
WriteInfo();
Console.Error.WriteLine("[-] File {0} does not exist.", args[i]);
return;
}
else
{
throw new Exception("Invalid argument given.");
}
}
break;
}
}
}
catch (Exception e)
{
WriteInfo();
Console.Error.WriteLine("[-] Error: Invalid arguments. Use -help for help ...");
#if DEBUG
Console.Error.WriteLine("[-] {0}", e.Message);
Console.Error.WriteLine("[-] {0}", e.StackTrace);
#endif
return;
}
if (!_isQuiet)
{
Console.WriteLine("[i] As3c - ActionScript3 ASM compiler");
}
Translator.InitTable();
#endregion
#region Integrity scan for the Translator class (DEBUG only)
#if DEBUG
if (Translator.CheckIntegrity())
{
if (!_isQuiet)
{
Console.WriteLine("[+] Integrity scan passed!");
}
}
else
{
Console.WriteLine("[-] Integrity scan failed...!");
}
#endif
#endregion
FileStream fileInput;
FileStream fileOutput;
SwfFormat swf;
switch (_action)
{
case Action.Dasm:
#region Disassemble file
swf = new SwfFormat();
fileInput = File.Open(_pathSwf, FileMode.Open, FileAccess.Read);
swf.Read(fileInput);
fileInput.Close();
fileInput.Dispose();
DisassemblerBase dasm;
switch (_dasmType)
{
case Dasm.As3c:
dasm = new DisassemblerAs3c();
break;
case Dasm.Plain:
dasm = new DisassemblerPlain();
break;
default:
throw new Exception();
}
dasm.Parse(swf);
if ("" == _pathOutput)
{
dasm.EmitToConsole();
}
else
{
fileOutput = File.Open(_pathOutput, FileMode.OpenOrCreate, FileAccess.Write);
dasm.EmitToStream(fileOutput);
fileOutput.Close();
fileOutput.Dispose();
}
#endregion
break;
case Action.Optimize:
#region Optimize SWF
swf = new SwfFormat();
fileInput = File.Open(_pathSwf, FileMode.Open, FileAccess.Read);
swf.Read(fileInput);
fileInput.Close();
fileInput.Dispose();
CompilerOptimize compOptimize = new CompilerOptimize(swf);
compOptimize.Compile();
fileOutput = File.Open((_pathOutput != "") ? _pathOutput : _pathSwf, FileMode.OpenOrCreate, FileAccess.Write);
swf.Write(fileOutput);
fileOutput.Close();
fileOutput.Dispose();
#endregion
break;
case Action.Inline:
#region Compile inline instructions
swf = new SwfFormat();
fileInput = File.Open(_pathSwf, FileMode.Open, FileAccess.Read);
swf.Read(fileInput);
fileInput.Close();
fileInput.Dispose();
CompilerInline compInline = new CompilerInline(swf);
compInline.Compile();
fileOutput = File.Open((_pathOutput != "") ? _pathOutput : _pathSwf, FileMode.OpenOrCreate, FileAccess.Write);
swf.Write(fileOutput);
fileOutput.Close();
fileOutput.Dispose();
#endregion
break;
case Action.Replace:
#region Replace method body
#region Simple pre-check
if ("" == _pathAsm || !File.Exists(_pathAsm))
{
Console.Error.WriteLine("[-] No valid ASM input given.");
return;
}
if ("" == _pathSwf || !File.Exists(_pathSwf))
{
Console.Error.WriteLine("[-] No valid SWF target given.");
return;
}
if ("" == _className)
{
Console.Error.WriteLine("[-] No class given.");
return;
}
if (!_isConstructor)
{
if ("" == _methodName)
{
Console.Error.WriteLine("[-] Need method name or constructor to replace");
return;
}
}
#endregion
swf = new SwfFormat();
fileInput = File.Open(_pathSwf, FileMode.Open, FileAccess.Read);
swf.Read(fileInput);
fileInput.Close();
fileInput.Dispose();
#region Body lookup
Abc46 abc = null;
SwfLibrary.Abc.MethodInfo method = null;
MethodBodyInfo body = null;
bool instanceFound = false;
Abc46 currentAbc = null;
string classFormat;
if (_className.IndexOf(".") != -1)
{
classFormat = "public::" + _className.Substring(0, _className.LastIndexOf(".")) + "::" + _className.Substring(_className.LastIndexOf(".") + 1, _className.Length - _className.LastIndexOf(".") - 1);
}
else
{
classFormat = "public::" + _className;
}
string methodFormat = _namespace + "::" + _methodName;
// Parse for all possibilities
for (int i = 0, n = swf.AbcCount; i < n; ++i)
{
currentAbc = swf.GetAbcAt(i);
for (int j = 0, m = currentAbc.Scripts.Count; j < m; ++j)
{
ScriptInfo script = (ScriptInfo)currentAbc.Scripts[j];
for (int k = 0, o = script.Traits.Count; k < o; ++k)
{
TraitInfo scriptTrait = (TraitInfo)script.Traits[k];
if (!(scriptTrait.Body is TraitClass))
{
continue;
}
TraitClass classBody = (TraitClass)scriptTrait.Body;
ClassInfo classInfo = (ClassInfo)currentAbc.Classes[(int)classBody.ClassI];
InstanceInfo instanceInfo = (InstanceInfo)currentAbc.Instances[(int)classBody.ClassI];
string instanceName = NameUtil.ResolveMultiname(currentAbc, instanceInfo.Name);
if (classFormat == instanceName)
{
instanceFound = true;
if (!_isQuiet)
{
Console.WriteLine("[+] Found class {0}", instanceName);
}
if (_isMethodStatic)
{
if (_isConstructor)
{
if (null != body)
{
Console.Error.WriteLine("[-] Can not explicitly determine method body.");
return;
}
method = (SwfLibrary.Abc.MethodInfo)currentAbc.Methods[(int)classInfo.CInit];
body = FindBody(currentAbc, classInfo.CInit);
abc = currentAbc;
if (null != body)
{
if (!_isQuiet)
{
Console.WriteLine("[+] Found static class initializer.");
}
}
}
else
{
Console.Error.WriteLine("[-] Sorry, static methods do not work yet ...");
return;
//TODO support static methods...
}
}
else
{
if (_isConstructor)
{
if (null != body)
{
Console.Error.WriteLine("[-] Can not explicitly determine method body.");
return;
}
method = (SwfLibrary.Abc.MethodInfo)currentAbc.Methods[(int)instanceInfo.IInit];
body = FindBody(currentAbc, instanceInfo.IInit);
abc = currentAbc;
if (null != body)
{
if (!_isQuiet)
{
Console.WriteLine("[+] Found class initializer.");
}
}
}
else
{
// here begins the ugly part ...
for (int l = 0, p = instanceInfo.Traits.Count; l < p; ++l)
{
TraitInfo instanceTrait = (TraitInfo)instanceInfo.Traits[l];
if (!(instanceTrait.Body is TraitMethod))
{
continue;
}
string methodName = NameUtil.ResolveMultiname(currentAbc, instanceTrait.Name);
if ("" == _namespace)
{
if ("public::" + _methodName != methodName &&
"private::" + _methodName != methodName &&
"protected::" + _methodName != methodName &&
"protected$::" + _methodName != methodName &&
"internal::" + _methodName != methodName)
{
continue;
}
}
else
{
if (methodName != methodFormat)
{
continue;
}
}
if (null != body)
{
Console.Error.WriteLine("[-] Can not explicitly determine method body.");
return;
}
TraitMethod methodBody = (TraitMethod)instanceTrait.Body;
method = (SwfLibrary.Abc.MethodInfo)currentAbc.Methods[(int)methodBody.Method];
body = FindBody(currentAbc, methodBody.Method);
abc = currentAbc;
if (null != body)
{
if (!_isQuiet)
{
Console.WriteLine("[+] Found method {0}", methodName);
}
}
}
}
}
}
}
}
}
if (null == body)
{
Console.Error.WriteLine("[-] Could not find {0}.", (instanceFound) ? "method" : "class");
return;
}
#endregion
//
// We have valid body to replace. Start the parser.
//
ParserAs3c parser = new ParserAs3c();
parser.Parse(_pathAsm);
//
// Convert the parser instructions to actual bytecode for the AVM2.
//
CompilerAs3c compAs3c = new CompilerAs3c();
compAs3c.Compile(currentAbc, parser.Instructions, parser.Labels, false);
//
// Get body information (maxstack, localcount, maxscopedepth, initscopedepth)
// We keep compiler directives in respect here ...
//
#region MethodBody information
U30 maxStack;
U30 maxScopeDepth;
U30 localCount;
U30 initScopeDepth = new U30();
if (parser.HasMaxStack)
{
maxStack = new U30();
maxStack.Value = parser.MaxStack;
}
else
{
maxStack = ByteCodeAnalyzer.CalcMaxStack(compAs3c.Code);
if (maxStack.Value < method.ParameterCount.Value)
{
maxStack.Value = method.ParameterCount.Value;
}
}
if (parser.HasLocalCount)
{
localCount = new U30();
localCount.Value = parser.LocalCount;
}
else
{
localCount = ByteCodeAnalyzer.CalcLocalCount(compAs3c.Code);
}
if (parser.HasInitScopeDepth)
{
initScopeDepth.Value = parser.InitScopeDepth;
}
else
{
initScopeDepth.Value = 1;
}
if (parser.HasMaxScopeDepth)
{
maxScopeDepth = new U30();
maxScopeDepth.Value = parser.MaxScopeDepth;
}
else
{
maxScopeDepth = ByteCodeAnalyzer.CalcScopeDepth(compAs3c.Code);
maxScopeDepth.Value += initScopeDepth.Value;
}
if (!_isQuiet)
{
Console.WriteLine("[i] InitScopeDepth: {0}", (int)initScopeDepth);
Console.WriteLine("[i] MaxScopeDepth: {0}", (int)maxScopeDepth);
Console.WriteLine("[i] MaxStack: {0}", (int)maxStack);
Console.WriteLine("[i] LocalCount: {0}", (int)localCount);
}
#endregion
//
// Replace the code of the body.
//
body.Code = compAs3c.Code;
//
// Update body information
//
body.MaxStack = maxStack;
body.MaxScopeDepth = maxScopeDepth;
body.InitScopeDepth = initScopeDepth;
body.LocalCount = localCount;
#region Write output
if ("" == _pathOutput)
{
fileOutput = File.Open(_pathSwf, FileMode.OpenOrCreate, FileAccess.Write);
}
else
{
fileOutput = File.Open(_pathOutput, FileMode.OpenOrCreate, FileAccess.Write);
}
swf.Write(fileOutput);
fileOutput.Close();
fileOutput.Dispose();
#endregion
#endregion
break;
case Action.Usage:
Usage();
break;
}
#region Program end
if (!_isQuiet)
{
Console.WriteLine("[i] Done.");
}
#endregion
}
catch (IOException ioex)
{
Console.Error.WriteLine("[-] Error: {0}", ioex.Message);
}
catch (InstructionException iex)
{
#region Parser errors
string message;
switch (iex.ErrorType)
{
case InstructionException.Type.InvalidSyntax:
message = "Error while parsing";
break;
case InstructionException.Type.NotEnoughArguments:
message = "Not enough arguments";
break;
case InstructionException.Type.TooManyArguments:
message = "Too many arguments";
break;
case InstructionException.Type.UnknownType:
message = "Unknown type";
break;
case InstructionException.Type.LabelRedefined:
message = "Label has already been defined";
break;
case InstructionException.Type.LabelMissing:
message = "Label has never been defined";
break;
default:
message = "Unknown error at";
break;
}
Console.Error.WriteLine("[-] " + message + ":");
if (null != iex.ParserInfo)
{
Console.Error.WriteLine("{0}({1}): {2}", iex.ParserInfo.FilePath, iex.ParserInfo.LineNumber, iex.ParserInfo.Line);
}
#endregion
}
catch (Exception ex)
{
Console.Error.WriteLine("[-] Unexpected error: {0}", ex.Message);
#if DEBUG
Console.Error.WriteLine("[-] Stacktrace: {0}", ex.StackTrace);
#endif
}
#if DEBUG
DateTime end = DateTime.Now;
TimeSpan delta = end - start;
Console.WriteLine("[i] Total: {0}sec {1}ms", delta.Seconds, delta.Milliseconds);
#endif
}