def renameFunctionsBasedOnstringRefrencesUsingTheDecompiler():
monitor.setMessage("Rename Functions Based on string refrences ")
function = getFirstFunction()
decompinterface = DecompInterface()
decompinterface.openProgram(currentProgram)
uniqueList = []
while function is not None and not monitor.isCancelled():
try:
tokengrp = decompinterface.decompileFunction(function, 0, ConsoleTaskMonitor())
code = tokengrp.getDecompiledFunction().getC()
pattern1 = r"\"[a-zA-Z0-9 .,\-\*\/\[\]\{\}\!\@\#\$\%\^\&\(\)\=\~\:\"\'\\\+\?\>\<\`\_\;]+\""
pattern2 = r'[ .,\-\*\/\[\]\{\}\!\@\#\$\%\^\&\(\)\=\~\:\"\'\\\+\?\>\<\`]+'
stringList = re.findall(pattern1,code)
if not stringList == []:
for unique in stringList:
if unique not in uniqueList:
uniqueList.append(unique)
name = re.sub(pattern2,"","_".join(uniqueList))
if len(name) > 15:
name = name[:15]
functionName = "rep_s_fun_" + str(function.getEntryPoint()) + "_" + name
print functionName
function.setName(functionName,USER_DEFINED)
except:
pass
function = getFunctionAfter(function)
return 0
def decompile(func):
global decompiler
if decompiler is None:
decompiler = DecompInterface()
decompiler.openProgram(currentProgram)
results = decompiler.decompileFunction(func, 10, TaskMonitor.DUMMY)
return results
def get_hfunction(self):
decomplib = DecompInterface()
decomplib.openProgram(currentProgram)
timeout = self.timeout
dRes = decomplib.decompileFunction(self.function, timeout, getMonitor())
hfunction = dRes.getHighFunction()
return hfunction
def get_high_function(func):
options = DecompileOptions()
monitor = ConsoleTaskMonitor()
ifc = DecompInterface()
ifc.setOptions(options)
ifc.openProgram(getCurrentProgram())
res = ifc.decompileFunction(func, 60, monitor)
return res.getHighFunction()
class Decompiler:
'''decompile binary into psuedo c using Ghidra API.
Usage:
>>> decompiler = Decompiler()
>>> psuedo_c = decompiler.decompile()
>>> # then write to file
'''
def __init__(self, program=None, timeout=None):
'''init Decompiler class.
Args:
program (ghidra.program.model.listing.Program): target program to decompile,
default is `currentProgram`.
timeout (ghidra.util.task.TaskMonitor): timeout for DecompInterface::decompileFunction
'''
# initialize decompiler with current program
self._decompiler = DecompInterface()
self._decompiler.openProgram(program or ghidra_app.currentProgram)
self._timeout = timeout
def decompile_func(self, func):
'''decompile one function.
Args:
func (ghidra.program.model.listing.Function): function to be decompiled
Returns:
string: decompiled psuedo C code
'''
# decompile
dec_status = self._decompiler.decompileFunction(func, 0, self._timeout)
# check if it's successfully decompiled
if dec_status and dec_status.decompileCompleted():
# get psuedo c code
dec_ret = dec_status.getDecompiledFunction()
if dec_ret:
return dec_ret.getC()
def decompile(self):
'''decompile all function recognized by Ghidra.
Returns:
string: decompiled all function as psuedo C
'''
# all decompiled result will be joined
psuedo_c = ''
# enum all functions and decompile each function
funcs = ghidra_app.currentProgram.getListing().getFunctions(True)
for func in funcs:
dec_func = self.decompile_func(func)
if dec_func:
psuedo_c += dec_func
return psuedo_c
def get_high_function(current_program, current_address):
decomplib = DecompInterface()
decomplib.openProgram(current_program)
current_function = getFunctionContaining(current_address)
decompile_res = decomplib.decompileFunction(current_function, 30,
getMonitor())
high_function = decompile_res.getHighFunction()
return high_function
def decompile_func(func):
decompiler = DecompInterface()
decompiler.openProgram(currentProgram)
results = decompiler.decompileFunction(func, 0, monitor)
if not results.decompileCompleted():
raise RuntimeError('failed to decompile function: {}'.format(func))
high_func = results.getHighFunction()
return high_func
def colorize_blocks(self):
global FINAL_MATCH_DICT
global TABLE_DIALOG
decompInterface = DecompInterface()
decompInterface.openProgram(currentProgram)
cov_block_list = []
for bb in self.basic_blocks.keys():
start_addr = toAddr(bb + self.program_base)
block_size = self.basic_blocks[bb] - 1
function = getFunctionContaining(start_addr)
self.set_basic_block_colors(start_addr, block_size)
if function and not function in cov_block_list:
cov_block_list.append(function)
for function in cov_block_list:
hfunction = decompInterface.decompileFunction(
function, 30, TaskMonitor.DUMMY).getHighFunction()
basic_blocks = hfunction.getBasicBlocks()
basic_block_len = len(basic_blocks)
total_block_size = 0
function_size = 0
total_cov_size = 0
for block in basic_blocks:
block_size = int(block.getStop().toString(), 16) - int(
block.getStart().toString(), 16)
function_size += block_size
bg_color = service.getBackgroundColor(block.getStart())
if bg_color and bg_color.getRGB() == -16711764:
total_block_size += 1
total_cov_size += block_size
block_hit = str(total_block_size) + "/" + str(basic_block_len)
if total_cov_size > 0:
total_cov_size = str(
int(100 * float(total_cov_size) /
float(function_size))) + "%"
elif total_block_size == basic_block_len:
total_cov_size = "100%"
else:
total_cov_size = "0%"
FINAL_MATCH_DICT[function.getName()] = [
function.getName(), total_cov_size, block_hit,
function.getEntryPoint()
]
for key in FINAL_MATCH_DICT.keys():
init_obj = Initializer()
init_obj.head = key
init_obj.function_address = FINAL_MATCH_DICT[key][3]
FINAL_MATCH_DICT[key].append(init_obj)
TABLE_DIALOG.add(init_obj)
def get_decompilation(calle_addr, func_name):
program = getCurrentProgram()
ifc = DecompInterface()
ifc.openProgram(program)
# here we assume there is only one function named `main`
function = getGlobalFunctions(func_name)[0]
# decompile the function and print the pseudo C
results = ifc.decompileFunction(function, 0, ConsoleTaskMonitor())
print(results.getDecompiledFunction().getC())
return results.getDecompiledFunction().getC()
def stub(address):
functionOffset = function.getEntryPoint().getOffset()
while functionOffset not in function_arguments_cache and not monitor.isCancelled():
# program = currentProgram
# function = currentProgram.getFunctionManager().getFunctionContaining(currentAddress)
decompinterface = DecompInterface()
decompinterface.openProgram(program)
result = decompinterface.decompileFunction(function, 0, monitor)
highFunction = result.getHighFunction()
if not result.isCancelled() and not result.isTimedOut():
function_arguments_cache[functionOffset] = highFunction
assert(functionOffset in function_arguments_cache)
highFunction = function_arguments_cache[functionOffset]
symbolMap = highFunction.getLocalSymbolMap()
args = []
for parameter in [symbolMap.getParam(i) for i in range(symbolMap.getNumParams())]:
emulator.logger.debug("Found parameter `%s` with size `%d` with type `%s`" % (parameter.getName(), parameter.getSize(), str(parameter.getDataType())))
param = getParam(parameter, emulator, monitor)
args.append(param)
emulator.logger.debug(str(args))
retval = func(*args)
emulator.logger.debug('Finish execution of hook %s with return value %s' % (func.__name__, repr(retval)))
pointerSize = emulator.program.getLanguage().getProgramCounter().getBitLength()//8
if type(retval) == int or type(retval) == long:
retval = long_to_bytes(retval, pointerSize)
if not emulator.program.getLanguage().isBigEndian():
retval = retval[::-1]
offset = 0
for varnode in function.getReturn().getVariableStorage().getVarnodes():
emulator.emulatorHelper.writeMemory(varnode.getAddress(), retval[offset:offset+varnode.getSize()])
offset += varnode.getSize()
emulator.logger.debug('Finish execution of hook %s we were at %s before' % (func.__name__, str(emulator.lastAddresses)))
current = emulator.emulatorHelper.getExecutionAddress()
for address in emulator.lastAddresses:
emulator.logger.debug('Checking if %s is different from %s' % (address, current))
if str(address) != str(current):
nextAddress = emulator.flatapi.getInstructionAfter(address).getAddress()
emulator.logger.debug('I propose to go to %s now' % (str(nextAddress)))
emulator.emulatorHelper.getEmulator().setExecuteAddress(nextAddress.getOffset())
emulator.logger.debug('Can you believe that we are at %s now?' % (str(emulator.emulatorHelper.getExecutionAddress())))
break
return True
def fixUndefinedDataTypes():
monitor.setMessage("Fixing Undefined Data Types")
function = getFirstFunction()
decompinterface = DecompInterface()
decompinterface.openProgram(currentProgram)
# get var list from decompilation
while function is not None:
prt = False
varList = []
try:
tokengrp = decompinterface.decompileFunction(function, 0, ConsoleTaskMonitor())
code = tokengrp.getDecompiledFunction().getC()
for line in code.split("\n"):
if line == " \r":
break
if prt:
varList.append(filter(None,line.split(";")[0].split(" ")))
if line.startswith("{"):
prt = True
except:
pass
for var in function.getAllVariables():
varMsg = str(var)
dt = str(var.getDataType())
inx = 0
if "undefined" in dt:
for decVar in varList:
if len(decVar) > 1:
arr = False
if len(decVar) == 3:
arr = True
inx = int(decVar[2].split("[")[1].split("]")[0])
if decVar[1].replace("*","") == var.getName():
if not "undefined" in decVar[0]:
if '*' in decVar[1]:
dt = getDataType("/" + decVar[0] + " " + ('*' * decVar[1].count("*")),arr,inx)
else:
dt = getDataType("/" + decVar[0],arr,inx)
else:
if '*' in decVar[1]:
dtlen = decVar[0].replace("undefined","")
if dtlen == "":
dtlen = "1"
dt = getDataTypeWrap(dtlen + ('*' * decVar[1].count("*")),arr,inx)
else:
dt = getDataTypeWrap(decVar[0],arr,inx)
if type(dt) == str:
dt = str(var.getDataType())
dt = dt.replace("undefined","")
dt = getDataTypeWrap(dt)
if dt:
try:
var.setDataType(dt,USER_DEFINED)
print "[+] " + str(function.getName()) + ": " + varMsg + " -> " + str(dt)
except:
pass
function = getFunctionAfter(function)
return 0
def prepare(self):
Decompiler = DecompInterface()
Decompiler.openProgram(currentProgram)
Decompiled_Func = Decompiler.decompileFunction(self.function, 30,
getMonitor())
self.highfunction = Decompiled_Func.getHighFunction()
from ghidra.app.decompiler import DecompInterface
from ghidra.util.task import ConsoleTaskMonitor
# get the current program
# here currentProgram is predefined
program = currentProgram
decompinterface = DecompInterface()
decompinterface.openProgram(program)
functions = program.getFunctionManager().getFunctions(True)
for function in list(functions):
print(function)
# decompile each function
tokengrp = decompinterface.decompileFunction(function, 0,
ConsoleTaskMonitor())
print(tokengrp.getDecompiledFunction().getC())
monitor.initialize(len(xrefs))
for xref in xrefs:
monitor.checkCanceled()
monitor.setMessage(str(xref))
# let's find the function that is calling us,
# and decompile it.
func = fm.getFunctionContaining(xref.getFromAddress())
if func is None:
print("No function found for xref at address " +
str(xref.getFromAddress()))
continue
if func in hit_funcs:
stat_skip += 1
continue
hit_funcs.add(func)
results = ifc.decompileFunction(func, 0, ConsoleTaskMonitor())
decomp_func = results.getDecompiledFunction()
if decomp_func is None:
# No decompilation available
print("Failed to decompile {} ({})".format(func.getName(), func))
stat_no_decomp += 1
continue
c_code = decomp_func.getC()
for match in regex.finditer(c_code):
typename = match.group(1)
typesize = int(match.group(2), 0)
hit = hit_types.get(typename)
if hit is not None:
stat_skip_type += 1
if hit != typesize:
stat_mismatch_size += 1
sz = len(data)
i = 0
while i < sz:
s = sock.send(data[i:])
i = i + s
fm = currentProgram.getFunctionManager()
decompiler = DecompInterface()
decompiler.openProgram(currentProgram)
serversocket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
serversocket.bind(("localhost", 14444))
serversocket.listen(1)
while True:
try:
(sock, address) = serversocket.accept()
while True:
addr_req = rd(sock, 8)
fixed_addr = struct.unpack("<Q", addr_req)[0]
addr_obj = getAddress(fixed_addr)
func = fm.getFunctionContaining(addr_obj)
status = decompiler.decompileFunction(func, 0, None)
if status != None and status.getDecompiledFunction():
c_code = status.getDecompiledFunction().getC()
wr(sock, struct.pack("<I", (len(c_code))))
wr(sock, c_code.encode("ascii"))
except:
print("Ok, connection died I guess")
from ghidra.program.model.listing import CodeUnit
from ghidra.program.model.pcode import HighFunctionDBUtil
from ghidra.program.model.symbol import SymbolType, SourceType
from ghidra.util.exception import CancelledException
from ghidra.util.task import ConsoleTaskMonitor
VTABLE_LABEL = "__vt"
options = DecompileOptions()
monitor = ConsoleTaskMonitor()
ifc = DecompInterface()
ifc.setOptions(options)
ifc.openProgram(currentProgram)
startingFunc = getFunctionContaining(currentAddress)
res = ifc.decompileFunction(startingFunc, 60, monitor)
# Get the indirect-call instruction nearest to the user's selection
inst = getInstructionAt(currentAddress)
while not any([pcode.opcode == pcode.CALLIND for pcode in inst.pcode]): inst = inst.getNext()
callAddr = inst.address
# Need to use decompiled Pcode to get AST access
callOp = [pcode for pcode in res.highFunction.getPcodeOps(callAddr) if pcode.opcode == pcode.CALLIND][0]
# Travel AST to get the object that's being called
castToCode = callOp.getInput(0).getDef()
if castToCode.opcode == castToCode.CAST:
loadFnPtr = castToCode.getInput(0).getDef()
else:
loadFnPtr = castToCode
from ghidra.program.model.block import BasicBlockModel
from ghidra.program.model.pcode import HighFunctionDBUtil
# logic to find and rename the main function
ifc = DecompInterface()
ifc.setOptions(DecompileOptions())
ifc.openProgram(currentProgram)
try:
entryfunction = getGlobalFunctions("entry")[0]
except:
# if binary has symbols
if getGlobalFunctions("_start"):
entryfunction = getGlobalFunctions("_start")[0]
else:
exit()
res = ifc.decompileFunction(entryfunction, 60, monitor)
m = re.search("__libc_start_main\((.+?),", res.getCCodeMarkup().toString())
if m.group(1)[0] != "main":
getGlobalFunctions(m.group(1))[0].setName("main", SourceType.ANALYSIS)
# for static blocks
blockiterator = BasicBlockModel(currentProgram).getCodeBlocks(monitor)
fun_blocks = {}
def add_block(function, block):
if function not in fun_blocks:
fun_blocks[function] = []
fun_blocks[function].append(block)
class Emulator(object):
def __init__(self, plugin, state=None, logger_fname="ghidra_emulator.txt"):
self.plugin = plugin
self.monitor = self.plugin.getMonitor()
if state is None:
state = self.plugin.getGhidraState()
program = state.getCurrentProgram()
address = state.getCurrentAddress()
self.byte_substitution = {}
self.initLogger(logger_fname)
self.initEmulator(program, address)
self.initCmdHandlers()
self.emulator_state = EmulatorState.WAITING_FOR_PARAM
self.flatapi = FlatProgramAPI(program)
def initLogger(self, fname):
self.logger_fname = fname
self.logger = logging.getLogger(str(random.random()).replace(".","_"))
self.logger.setLevel(logging.INFO)
h_stdout = logging.StreamHandler(sys.stdout)
h_stdout.setLevel(logging.INFO)
self.logger.addHandler(h_stdout)
if self.logger_fname:
h_file = logging.FileHandler(self.logger_fname)
h_file.setLevel(logging.INFO)
self.logger.addHandler(h_file)
def initEmulator(self, program, address, clear_param_map=True):
''' Setup the emulator helper, symbol maps and fn related stuff '''
self.program = program
self.function = self.program.getFunctionManager().getFunctionContaining(address)
if self.function is None:
function_name = self.plugin.askString("You are not in a function, please enter an address or a function name", "address or symbol name")
for f in self.plugin.state.currentProgram.getFunctionManager().getFunctions(True):
if function == f.getName():
self.plugin.state.setCurrentAddress(function.getEntryPoint())
self.doStart()
return
for f in self.plugin.state.currentProgram.getFunctionManager().getFunctions(True):
if int(function, 16) == f.getEntryPoint().getOffset():
self.plugin.state.setCurrentAddress(function.getEntryPoint())
self.doStart()
return
self.entrypoint = self.program.getListing().getInstructionAt(self.function.getEntryPoint())
self.logger.info("Program: %s" % self.program)
self.logger.info("Function: %s" % self.function)
self.decompinterface = DecompInterface()
self.decompinterface.openProgram(program)
result = self.decompinterface.decompileFunction(self.function, 0, self.monitor)
self.highFunction = result.getHighFunction()
# self.logger.info(result)
# self.logger.info(self.highFunction)
self.decompiled = str(result.getCCodeMarkup())
# self.logger.info("Decompiled: %s" % self.decompiled)
self.symbolMap = self.highFunction.getLocalSymbolMap()
# self.logger.info(self.symbolMap)
if clear_param_map:
self.parameterMap = {}
# fuzz = 0
self.emulatorHelper = EmulatorHelper(self.program)
self.stackPointer = (((1 << (self.emulatorHelper.getStackPointerRegister().getBitLength() - 1)) - 1) ^ ((1 << (self.emulatorHelper.getStackPointerRegister().getBitLength()//2))-1))
self.returnAddressSize = program.getLanguage().getProgramCounter().getBitLength()
NULL_PTR_RET = 0
self.emulatorHelper.writeRegister(self.emulatorHelper.getStackPointerRegister(), self.stackPointer)
self.emulatorHelper.setBreakpoint(self.getStackAddress(NULL_PTR_RET))
self.emulatorHelper.enableMemoryWriteTracking(True)
self.emulator_state = EmulatorState.WAITING_FOR_PARAM
if not clear_param_map:
self.emulator_state = EmulatorState.READY
self.history = []
self.lastAddresses = []
# self.emulatorHelper.getEmulator().executeInstruction = executeInstruction
self.hookExternalFunctions()
# def nopCallBack(BreakCallBack):
# def __init__(self):
# # BreakCallBack.__init__(self)
# pass
# def pcodeCallback(self, op):
# return True
# help(nopCallBack)
# emulatorHelper.registerCallOtherCallback('HintPreloadData', nopCallBack(BreakCallBack()))
def hookExternalFunctions(self):
for externalFunction in list(self.program.getFunctionManager().getExternalFunctions()):
self.logger.debug('Found external function `%s`' % (externalFunction.getName()))
for library in lib.exports:
self.logger.debug('Found library `%s`' % (library.name))
for function in library.exports:
self.logger.debug('Found function `%s`' % (function.__name__))
if externalFunction.getName() == function.__name__:
for address in externalFunction.getFunctionThunkAddresses():
self.logger.info('Hooked function `%s`@%s with implementation lib/%s/%s' % (externalFunction.getName(), str(address), library.name, function.__name__))
callback = DucktapeBreakCallback(function(self.program, self, self.program.getFunctionManager().getFunctionAt(address), self.monitor), lambda x: True)
# callback.addressCallback = function(self.program, self, self.program.getFunctionManager().getFunctionAt(address), self.monitor)
self.emulatorHelper.emulator.getBreakTable().registerAddressCallback(address, callback)
# self.emulatorHelper.setBreakpoint(address)
# break
for thunkFunction in list(filter(lambda x: x.isThunk(), self.program.getFunctionManager().getFunctions(True))):
for library in lib.exports:
self.logger.debug('Found library `%s`' % (library.name))
for function in library.exports:
self.logger.debug('Found function `%s`' % (function.__name__))
if thunkFunction.getName() == function.__name__:
address = thunkFunction.getEntryPoint()
self.logger.info('Hooked function `%s` at %s with implementation lib/%s/%s' % (thunkFunction.getName(), str(address), library.name, function.__name__))
callback = DucktapeBreakCallback(function(self.program, self, self.program.getFunctionManager().getFunctionAt(address), self.monitor), lambda x: True)
# callback.addressCallback = function(self.program, self, self.program.getFunctionManager().getFunctionAt(address), self.monitor)
self.emulatorHelper.emulator.getBreakTable().registerAddressCallback(address, callback)
def initFunctionParameters(self, bytesValueBuffer=""):
''' Setup fn input parameters '''
self.input_wildcards = []
self.fnParametersAllBytesValue = ""
for parameter in [self.symbolMap.getParam(i) for i in range(self.symbolMap.getNumParams())]:
psize = self.parameterStorageSize(parameter)
if len(bytesValueBuffer) < psize*2:
bytesValueBuffer = self.plugin.askString('Setting Parameters for `{}` (size: {})'.format(parameter.name, psize), 'byte values')
bytesValue = bytesValueBuffer[:psize*2]
bytesValue = (bytesValue + "00"*psize)[:psize*2]
assert(len(bytesValue) == psize*2)
for i in range(0,len(bytesValue), 2):
if bytesValue[i] in string.hexdigits and bytesValue[i+1] in string.hexdigits: continue
self.input_wildcards.append(bytesValue[i:i+2])
self.parameterMap[parameter.name] = bytesValue
self.fnParametersAllBytesValue += bytesValue
bytesValueBuffer = bytesValueBuffer[psize*2:]
# self.logger.info(self.parameterMap)
if self.input_wildcards:
self.logger.info("Found %d wildcards: %s" % (len(self.input_wildcards), self.input_wildcards))
self.logger.info("The next batch of cmds will be executed in fuzzing mode")
for w in self.input_wildcards:
self.byte_substitution[w] = "00"
self.emulator_state = EmulatorState.READY
# @staticmethod
def parameterStorageSize(self, parameter):
return sum(map(lambda x: x.getSize(), parameter.getStorage().getVarnodes()))
def getAddress(self, offset):
return self.program.getAddressFactory().getDefaultAddressSpace().getAddress(offset)
def getStackAddress(self, offset):
address = self.getAddress(self.emulatorHelper.readRegister(self.emulatorHelper.getStackPointerRegister()) + offset)
orAddress = self.getAddress(self.stackPointer + offset)
self.logger.debug('Stack address at {} or {}'.format(address, orAddress))
return orAddress
def writeStackValue(offset, size, value):
bytesValue = long_to_bytes(value, size)
if not self.emulatorHelper.getLanguage().isBigEndian():
bytesValue = bytesValue[::-1]
self.emulatorHelper.writeMemory(self.getStackAddress(offset), bytesValue)
def applyByteSubstitution(self, bytesValue):
for k,v in self.byte_substitution.items():
bytesValue = bytesValue.replace(k, v)
return bytesValue.decode('hex')
def start(self, byte_substitution=None):
''' Write the fn inputs in memory (eventually applying the byte substitution) and
start the emulation, breaking at fn entry point'''
assert(self.emulator_state == EmulatorState.READY)
if byte_substitution is not None:
self.byte_substitution = byte_substitution
self.logger.info('Started with byte_sub: %r' % self.byte_substitution)
for parameter in [self.symbolMap.getParam(i) for i in range(self.symbolMap.getNumParams())]:
bytesValue = self.parameterMap[parameter.name]
bytesValue = self.applyByteSubstitution(bytesValue)
storage = parameter.getStorage()
offset = 0
for varnode in storage.getVarnodes():
chunk = bytesValue[offset:offset+varnode.getSize()]
if varnode.getAddress().isStackAddress():
self.emulatorHelper.writeMemory(self.getStackAddress(varnode.getAddress().getOffset()), chunk)
else:
self.emulatorHelper.writeMemory(varnode.getAddress(), chunk)
offset += varnode.getSize()
self.emulatorHelper.setBreakpoint(self.function.getEntryPoint())
self.emulatorHelper.run(self.function.getEntryPoint(), self.entrypoint, self.monitor)
self.emulator_state = EmulatorState.EXECUTING
def executeCmds(self, cmds):
assert(self.emulator_state == EmulatorState.EXECUTING)
cmds = cmds.strip().split(', ')
for cmd_id, cmd in enumerate(cmds):
cmd = cmd.strip().split()
if cmd[0] not in self.cmd_handlers:
self.logger.error("Unknown command %s (%r)" % (cmd[0], cmd))
self.cmdHelp(cmd)
break
res = self.cmd_handlers[cmd[0]](cmd)
if res: self.last_result = res
self.updateUI()
# self.printState()
self.logger.info('Stopping execution for {} at {:x} with error {}'.format(self.emulatorHelper.getEmulateExecutionState(), self.emulatorHelper.readRegister(self.emulatorHelper.getPCRegister()), self.emulatorHelper.getLastError()))
def printState(self):
for symbol in self.program.getSymbolTable().getAllSymbols(True):
symbolObject = symbol.getObject()
try:
dataType = symbolObject.getDataType()
name = symbol.getName()
if name in self.decompiled and symbol.getAddress():
self.logger.debug('Found symbol name={} type={} location={}'.format(name, dataType, symbol.getAddress()))
bytesValue = self.emulatorHelper.readMemory(symbol.getAddress(), dataType.getLength())
stringValue = bytesValue.tostring()
printValue = repr(stringValue) if isPrintable(stringValue) else stringValue.encode('hex')
self.logger.info('Variable {} has value `{}`'.format(name, printValue))
except AttributeError as e:
self.logger.debug(str(e))
except Exception as e:
self.logger.error(str(e))
writeSet = self.emulatorHelper.getTrackedMemoryWriteSet()
for parameter in self.highFunction.getLocalSymbolMap().getSymbols():
if parameter.name not in self.decompiled:
continue
storage = parameter.getStorage()
bytesValue = bytearray(0)
for varnode in storage.getVarnodes():
if varnode.getAddress().isStackAddress():
bytesValue.extend(self.emulatorHelper.readMemory(self.getStackAddress(varnode.getAddress().getOffset()), varnode.getSize()))
elif writeSet.contains(varnode.getAddress()):
bytesValue.extend(self.emulatorHelper.readMemory(varnode.getAddress(), varnode.getSize()))
stringValue = str(bytesValue)
printValue = repr(stringValue) if isPrintable(stringValue) else stringValue.encode('hex')
self.logger.info('Variable `{}` @ `{}` has value `{}`'.format(parameter.name, storage, printValue))
for register in self.emulatorHelper.getLanguage().getRegisters():
if register.isBaseRegister() and not register.isProcessorContext():
self.logger.debug(str(register))
self.logger.debug(str(self.emulatorHelper.readRegister(register)))
self.logger.debug(str(self.emulatorHelper))
self.logger.debug(str(self.emulatorHelper.getLanguage()))
self.logger.debug(str(self.emulatorHelper.getLanguage().getRegisters()))
self.logger.info(str(['{} = {}'.format(register, self.emulatorHelper.readRegister(register)) for register in self.emulatorHelper.getLanguage().getRegisters() if register.isBaseRegister() and not register.isProcessorContext()]))
self.logger.info('Stopping execution at {:x}'.format(self.emulatorHelper.readRegister(self.emulatorHelper.getPCRegister())))
self.logger.debug('Logged writes at {}'.format(self.emulatorHelper.getTrackedMemoryWriteSet()))
def readMemory(self, from_, size):
bytesValue = bytearray(0)
bytesValue.extend(self.emulatorHelper.readMemory(self.getAddress(from_), size))
stringValue = str(bytesValue)
self.logger.info('Reading from {} (size: {}): {}\n\thex={}'.format(from_, size, repr(stringValue), stringValue.encode("hex")))
return stringValue
def readPointer(self, address):
self.logger.debug('reading %d from address %s' % (self.program.getLanguage().getProgramCounter().getBitLength()//8, str(address)))
packed = bytearray(0)
packed.extend(self.emulatorHelper.readMemory(address, self.program.getLanguage().getProgramCounter().getBitLength()//8))
self.logger.debug('reading `%s` from address' % repr(str(packed)))
if not self.program.getLanguage().isBigEndian():
packed = str(packed[::-1])
self.logger.debug('got pointer at `%s`' % repr(str(packed)))
return int(packed.encode('hex'), 16)
def writeMemory(self, from_, bytesValue):
bytesValue = applyByteSubstitution(bytesValue)
self.emulatorHelper.writeMemory(self.getAddress(from_), bytesValue)
def updateUI(self):
self.plugin.syncView(self.emulatorHelper.getExecutionAddress())
def initCmdHandlers(self):
self.cmd_handlers = {
's': self.cmdStep,
'c': self.cmdContinue,
'n': self.cmdNext,
'b': self.cmdBreakpointAdd,
'd': self.cmdBreakpointRemove,
'x': self.cmdSleep,
'q': self.cmdQuit,
'r': self.cmdReadMem,
'w': self.cmdWriteMem,
'p': self.cmdPrintState,
'h': self.cmdHelp,
'l': self.cmdLogHistory,
'e': self.cmdEval,
'hook': self.cmdHook,
'list-hooks': self.cmdListHook,
}
@history
def cmdHook(self, cmd):
'''hook address module.function - replace a function with a python implementation
e.g. hook 0x40000 libc6.puts
'''
address = self.getAddress(int(cmd[1], 16))
library_name, function_name = cmd[2].split('.')
thunkedFunction = self.program.getFunctionManager().getFunctionContaining(address)
for library in lib.exports:
if library_name == library_name:
self.logger.debug('Found library `%s`' % (library.name))
for function in library.exports:
self.logger.debug('Found function `%s`' % (function.__name__))
if function_name == function.__name__:
self.logger.info('Hooked function `%s` at %s with implementation lib/%s/%s' % (thunkedFunction.getName(), str(address), library.name, function.__name__))
callback = DucktapeBreakCallback(function(self.program, self, thunkedFunction, self.monitor), lambda x: True)
# callback.addressCallback = function(self.program, self, self.program.getFunctionManager().getFunctionAt(address), self.monitor)
self.emulatorHelper.emulator.getBreakTable().registerAddressCallback(address, callback)
break
@history
def cmdListHook(self, cmd):
'''List available hooks
'''
for library in lib.exports:
self.logger.debug('Found library `%s`' % (library.name))
for function in library.exports:
self.logger.debug('Found function `%s`' % (function.__name__))
self.logger.info('%s.%s - %s' % (library.name, function.__name__, function.__doc__))
@history
def cmdStep(self, cmd):
'''step'''
self.emulatorHelper.step(self.monitor)
def run(self, monitor):
self.emulatorHelper.emulator.setHalt(False)
while not self.emulatorHelper.emulator.getHalt():
self.emulatorHelper.step(monitor)
currentAddress = self.emulatorHelper.getExecutionAddress()
if len(self.lastAddresses) == 0 or self.lastAddresses[0] != currentAddress:
self.lastAddresses = [currentAddress] + self.lastAddresses[:1]
@history
def cmdContinue(self, cmd):
'''continue'''
self.run(self.monitor)
@history
def cmdNext(self, cmd):
'''step over/next'''
address = self.flatapi.getInstructionAfter(self.emulatorHelper.getExecutionAddress()).getAddress()
self.emulatorHelper.setBreakpoint(address)
self.run(self.monitor)
self.emulatorHelper.clearBreakpoint(address)
@history
def cmdBreakpointAdd(self, cmd):
'''add breakpoint (`hex_address`)'''
address = self.getAddress(int(cmd[1], 16))
self.emulatorHelper.setBreakpoint(address)
@history
def cmdBreakpointRemove(self, cmd):
'''remove breakpoint (`hex_address`)'''
address = self.getAddress(int(cmd[1], 16))
self.emulatorHelper.clearBreakpoint(address)
@history
def cmdSleep(self, cmd):
'''sleep (`time(=5)`)'''
for i in range(10000):
self.monitor.isCancelled()
# time.sleep(5 if len(cmd) == 1 else int(cmd[1]))
@history
def cmdQuit(self, cmd):
'''quit'''
self.printState()
self.updateUI()
self.emulator_state = EmulatorState.DONE
@history
def cmdReadMem(self, cmd):
'''read memory addr (either `hex_from:hex_to` or `hex_from size`)'''
if len(cmd) == 3:
from_ = cmd[1]
size = int(cmd[2], 16 if "0x" in cmd[2].lower() else 10)
else:
from_, to_ = map(lambda x: int(x,16), cmd[1].split(":"))
size = to_-from_
from_ = hex(from_)
return self.readMemory(from_.replace("0x",""), size)
@history
def cmdWriteMem(self, cmd):
'''write memory addr (`hex_addr hex_bytes`)'''
self.writeMemory(cmd[1], cmd[2])
@history
def cmdPrintState(self, cmd):
'''print state'''
self.printState()
@history
def cmdEval(self, cmd):
'''executes your command'''
exec(' '.join(cmd[1:]))
def cmdHelp(self, cmd):
'''help'''
self.logger.info("Commands:")
for k,v in self.cmd_handlers.items():
self.logger.info("\t%s: %s" % (k, v.__doc__))
def cmdLogHistory(self, cmd):
'''prints a serialized version of this debugging session'''
self.logger.debug(self.history)
self.logger.info("`%s`" % (', '.join(self.history)))
# Verify the '.text' section is loaded
assert ('.text' in [b.name for b in getMemoryBlocks()])
# Verify the entry point has been marked
entry = None
for f in currentProgram.getFunctionManager().getFunctions(True):
if f.name == 'entry':
entry = f
break
assert (entry is not None)
# Attempt to decompile the entry point function
from ghidra.app.decompiler import DecompInterface
di = DecompInterface()
di.openProgram(currentProgram)
print(di.decompileFunction(entry, 0, None).getDecompiledFunction().getC())
# Ghidra silently swallows exceptions, so create a file at the end of the test
# to mark success
open('TEST_PASS', 'w').write('pass')
program = getCurrentProgram()
ifc = DecompInterface()
ifc.openProgram(program)
# getting each decompiled function
func_iter = program.getListing().getFunctions(True)
while (func_iter.hasNext()):
func = func_iter.next()
name = func.getName()
if ('.' == name[0]): continue
ghidra_names.append(name)
results = ifc.decompileFunction(func, 0, monitor)
c_func = results.getDecompiledFunction().getC()
while ("\0" in c_func):
c_func = c_func[:c_func.index('\0')] + '0' + c_func[c_func('\0') + 1:]
ghidra_functions.append(c_func)
# closing the decompiler
ifc.closeProgram()
for file_func in file_functions:
file_function = file_functions[file_func]
potential_functions = {}
print(file_func)
for index in range(len(ghidra_functions)):
ghidra_func = ghidra_functions[index]
'<')].replace(
u'::',
u'/') + newTypeName[newTypeName.find('<'):]
newType = currentProgram.getDataTypeManager(
).getDataType("boot.dol/Demangler/" + newTypeName)
print offset, newTypeName, newType
thisType.replaceAtOffset(offset.value, newType, 0,
None, None)
inst = inst.next
options = DecompileOptions()
monitor = ConsoleTaskMonitor()
ifc = DecompInterface()
ifc.setOptions(options)
ifc.openProgram(currentFunction.program)
res = ifc.decompileFunction(currentFunction, 60, monitor)
high_func = res.getHighFunction()
inst = getInstructionAt(currentAddress)
while inst.address < currentFunction.body.maxAddress:
callConstructor = None
if inst.getFlowType().isCall() and \
inst.getFlows()[0] == baseParamConstructor.entryPoint:
callConstructor = inst
print "Constructor is called at", callConstructor.address
fieldOffset = None
if callConstructor is not None:
call = list(high_func.getPcodeOps(callConstructor.address))[0]
thisDef = call.inputs[1].getDef().inputs[0].getDef()
if thisDef is None:
"""
Usage:
./analyzeHeadless [GHIDRA WORKING DIR] [PROJECT NAME] -import [BINARY] -overwrite \
-postscript decompile_func.py [FUNCTION] [OUTPUT DIR]
"""
import os
from ghidra.app.decompiler import DecompInterface
from ghidra.util.task import ConsoleTaskMonitor
args = getScriptArgs()
print("[+] Decompiling '{}' now...".format(args[0]))
program = getCurrentProgram()
decompiface = DecompInterface()
decompiface.openProgram(program)
func = getGlobalFunctions(args[0])[0]
res = decompiface.decompileFunction(func, 0, ConsoleTaskMonitor())
if not os.path.exists(args[1]):
os.makedirs(args[1])
fname = "{}/{}.c".format(args[1], args[0])
f = open(fname, 'w')
f.write(res.getDecompiledFunction().getC())
f.close()