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[Synalyze It Pro: Python 2 and 3 Bytecode Grammar] Targets .pyc and .pyo bytecode files. #synalyzeitpro #grammar #python #python3 #bytecode
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| <?xml version="1.0" encoding="UTF-8"?> | |
| <ufwb version="1.5.1"> | |
| <grammar name="Python Bytecode" start="id:104" author="André Berg" email="[email protected]" fileextension="pyc, pyo" uti="public.data" complete="yes"> | |
| <description>Grammar for PYC and PYO files | |
| Version: 8 | |
| Now works with pyc/pyo files generated by Python 2, Python 3.0-3.2 and Python 3.3. | |
| References | |
| http://daeken.com/2010-02-20_Python_Marshal_Format.html | |
| http://nedbatchelder.com/blog/200804/the_structure_of_pyc_files.html | |
| See also: marshal.c, longobject.c, ceval.c and _bootstrap.py from Python source</description> | |
| <scripts> | |
| <script name="Timestamp" type="DataType" id="43"> | |
| <description>Parse header timestamp, which is a 4 byte little endian value starting at offset 4.</description> | |
| <source language="Python"># Data type script for displaying and manipulating the | |
| # timestamp header bytes in a Python bytcode (pyc) file. | |
| # | |
| # pyc header | |
| # 8 16 | |
| # +-+-+-+-+-+-+-+-+ +-+-+-+-+-+-+-+-+ | |
| # |X|X|X|X|0|D|0|A| |T|I|M|E|S|T|M|P| | |
| # +-+-+-+-+-+-+-+-+ +-+-+-+-+-+-+-+-+ | |
| # \______/\______/ \_______________/ | |
| # inc. cr/lf timestamp | |
| # | |
| # Author: Andre Berg | |
| # | |
| # You can change the TIME_FORMAT constant below to the | |
| # format you are most comfortable with. By default it | |
| # will use an ISO-8601 date time format. | |
| # | |
| import time, struct | |
| import datetime | |
| ASCTIME_FORMAT = "%a %b %d %H:%M:%S %Y" | |
| ISODATE_FORMAT = "%Y-%m-%d %H:%M:%S" | |
| TIME_FORMAT = ISODATE_FORMAT | |
| def parseByteRange(element, byteView, bitPos, bitLength, results): | |
| # this method parses data starting at bitPos, bitLength bits are remaining | |
| """parseByteRange method""" | |
| tsBytes = byteView.readUnsignedInt(bitPos/8, 4, ENDIAN_LITTLE) | |
| stamp = str(time.strftime(TIME_FORMAT, time.localtime(tsBytes))) | |
| # create and set new value | |
| value = Value() | |
| value.setString(stamp) | |
| # how many bytes were processed? | |
| processedBytes = 4 | |
| iteration = 0 | |
| results.addElement(element, processedBytes, iteration, value) | |
| # return number of processed bytes | |
| return processedBytes | |
| def fillByteRange(value, byteArray, bitPos, bitLength): | |
| # this method translates edited values back to the file | |
| """fillByteRange method""" | |
| editedString = value.getString() | |
| newStamp = int(time.mktime(time.strptime(editedString, TIME_FORMAT))) | |
| newBytes = struct.pack('I', newStamp) | |
| # write an integer back to file | |
| byteArray.fillRange(bitPos/8, 4, newBytes) | |
| </source> | |
| </script> | |
| <script name="LongObjectValue" type="DataType" id="528"> | |
| <description>Interpret value part of Python's long integer representation (PyLong objects). See longintrepr.h, longint.c and longint.h in Python's source code.</description> | |
| <source language="Python"># Data type script for interpreting the value part | |
| # of Python's long integer object representation. | |
| # | |
| # Serialization of PyLong objects to marshal's bytecode | |
| # format has the following layout: | |
| # | |
| # +--+--+--+--+--+--+--+--+--+ | |
| # |6C|XX|XX|XX|XX|NN| ... |NN| | |
| # +--+--+--+--+--+--+--+--+--+ | |
| # \_/ \_________/ \_________/ | |
| # l size digit arr. | |
| # | |
| # The size determines the length of the variable digit array portion. | |
| # It is exactly size * 2 bytes long. | |
| # | |
| # Python's long objects are packed structures representings | |
| # arbitrary size integers. In the source code these are represented | |
| # by PyLong objects which have a size and an array of digits | |
| # that get de- and reconstructed by some trickery with shifting | |
| # operations. | |
| # | |
| # marshal.c then does some additional trickery to store and decode | |
| # them. If you are really interested to find out about this, see | |
| # the following files in Python's source code: | |
| # | |
| # methods r_long and r_PyLong in marshal.c | |
| # longintrepr.h, longobj.h and longobj.c, specifically the method long_from_bytes | |
| # | |
| # Author: Andre Berg | |
| # | |
| import marshal | |
| import sys | |
| def sysbits(): | |
| if sys.maxsize > 2**32: | |
| return 64 | |
| else: | |
| return 32 | |
| def is_64bit(): | |
| if sysbits() > 32: | |
| return True | |
| else: | |
| return False | |
| def is_32bit(): | |
| if sysbits() <= 32: | |
| return True | |
| else: | |
| return False | |
| # Unfortunately Python 2.6 doesn't have sys.int_info yet | |
| # so we have to guess PyLong_SHIFT. | |
| if is_64bit(): | |
| PyLong_SHIFT = 30 | |
| SIZEOF_LONG = 8 | |
| else: | |
| PyLong_SHIFT = 15 | |
| SIZEOF_LONG = 4 | |
| PyLong_BASE = (1 << PyLong_SHIFT) | |
| PyLong_MASK = (PyLong_BASE - 1) | |
| PyLong_MARSHAL_SHIFT = 15 | |
| PyLong_MARSHAL_BASE = (1 << PyLong_MARSHAL_SHIFT) | |
| PyLong_MARSHAL_MASK = (PyLong_MARSHAL_BASE - 1) | |
| PyLong_MARSHAL_RATIO = round(PyLong_SHIFT / PyLong_MARSHAL_SHIFT) | |
| def r_long(b): | |
| x = b[0] | |
| x |= b[1] << 8 | |
| x |= b[2] << 16 | |
| x |= b[3] << 24 | |
| if SIZEOF_LONG > 4: | |
| # Sign extension for 64-bit machines | |
| x |= -(x & 0x80000000) | |
| return x | |
| def parseByteRange(element, byteView, bitPos, bitLength, results): | |
| # this method parses data starting at bitPos, bitLength bits are remaining | |
| """parseByteRange method""" | |
| tsBytes = [] | |
| bv = byteView | |
| # need to read the whole marshal structure incl 0x6C indicating type 'l'ong and 4 size bytes | |
| type_mask = '\x6C' | |
| size_mask = '\x00\x00\x00\x00' | |
| offset = len(type_mask) + len(size_mask) | |
| if sys.byteorder == 'little': | |
| endianess = ENDIAN_LITTLE | |
| else: | |
| endianess = ENDIAN_BIG | |
| start = ((bitPos/8) - offset) | |
| size = abs(int(byteView.readSignedInt(int(start + 1), 4, endianess))) | |
| if PyLong_MARSHAL_SHIFT == 30: | |
| size <<= 2 | |
| else: | |
| size <<= 1 | |
| for i in range(0, size + offset): | |
| tsBytes.append(byteView.readByte(int(start + i))) | |
| tsBytesStr = "" | |
| for b in tsBytes: | |
| tsBytesStr += chr(b) | |
| # create and set new value | |
| value = Value() | |
| value.setString(str(marshal.loads(tsBytesStr))) | |
| # how many bytes were processed? | |
| processedBytes = size | |
| iteration = 0 | |
| results.addElement(element, processedBytes, iteration, value) | |
| # return number of processed bytes | |
| return processedBytes | |
| def fillByteRange(value, byteArray, bitPos, bitLength): | |
| # this method translates edited values back to the file | |
| """fillByteRange method""" | |
| # write an integer back to file | |
| # byteArray.writeUnsignedIntBits(highWord, bitPos, bitLength, ENDIAN_BIG) | |
| # Note: although it would be somewhat trivial to write this method | |
| # using Python's marshal.dumps() method, one would also have to check | |
| # that the integer entered actually converts to a type 6C ('l') bytearray | |
| # because otherwise the length of the file would change. The difficulty is that | |
| # different Python versions handle integer size and limits differently. | |
| # | |
| # The implementation below only applies the change if the length of the file | |
| # wouldn't change. | |
| # | |
| offset = len('\x6C\x00\x00\x00\x00') | |
| start = ((bitPos/8) - offset) | |
| editedString = value.getString() | |
| try: | |
| newBytes = marshal.dumps(long(editedString)) | |
| except ValueError: | |
| return | |
| valuePortion = newBytes[offset:] | |
| if newBytes[0] == '\x6C' and len(valuePortion) == (bitLength/8): | |
| byteArray.fillRange(start, len(newBytes), newBytes) | |
| </source> | |
| </script> | |
| </scripts> | |
| <structure name="defaults" id="105" encoding="UTF-8" endian="little" signed="no"/> | |
| <structure name="Python Bytecode" id="104" extends="id:105"> | |
| <scriptelement name="DetermineBytecodeVersion" id="107"> | |
| <script name="unnamed" type="Generic"> | |
| <source language="Lua">function log(msg) | |
| logSrc = currentMapper:getCurrentLogSrc() | |
| logSrc:logMessage("PYT", 111, synalysis.SEVERITY_INFO, tostring(msg)) | |
| end | |
| function getPycVersion() | |
| bv = currentMapper:getCurrentByteView() | |
| byteAtOffsetEight = bv:readByte(8) | |
| --log(byteAtOffsetEight) | |
| if byteAtOffsetEight == 0x63 then | |
| byteAtOffsetTwenty = bv:readByte(25) | |
| --log(byteAtOffsetTwenty) | |
| if byteAtOffsetTwenty == 0x73 then | |
| return 20 | |
| else | |
| return 30 | |
| end | |
| else | |
| return 33 | |
| end | |
| end | |
| function pycVersionAsString() | |
| n = getPycVersion() | |
| if n >= 33 then | |
| return "Version 3.3" | |
| elseif n == 30 then | |
| return "Version 3.0" | |
| else | |
| return "Version 2.0" | |
| end | |
| end | |
| function resultAsString(r) | |
| if r == nil then | |
| return "nil" | |
| elseif r.getName ~= nil then | |
| return tostring(r:getName()) | |
| else | |
| return "Unknown" | |
| end | |
| end | |
| currentGrammar = currentMapper:getCurrentGrammar() | |
| results = currentMapper:getCurrentResults() | |
| byteArray = currentMapper:getCurrentByteArray() | |
| byteView = currentMapper:getCurrentByteView() | |
| fileLength = byteView:getLength() | |
| lastResult = results:getLastResult() | |
| marshalDataResult = results:getResultByName("Marshal data") | |
| flagsResult = results:getResultByName("flags") | |
| topLevelResult = results:getResultByName("Python Bytecode") | |
| prevResult = results:getPrevResult(lastResult) | |
| pycVersion = getPycVersion() | |
| pycVersionStr = pycVersionAsString() | |
| --log("Bytecode " .. pycVersionStr) | |
| version2Structure = currentGrammar:getStructureByName("Version 2") | |
| version30Structure = currentGrammar:getStructureByName("Version 3.0") | |
| version33Structure = currentGrammar:getStructureByName("Version 3.3") | |
| whichStructure = nil | |
| if (pycVersion == 20) then | |
| whichStructure = version2Structure | |
| elseif (pycVersion == 30) then | |
| whichStructure = version30Structure | |
| else | |
| whichStructure = version33Structure | |
| end | |
| bytesProcessed = currentMapper:mapStructureAtPosition(whichStructure, 0, fileLength)</source> | |
| </script> | |
| </scriptelement> | |
| </structure> | |
| <structure name="Version 2" id="109" repeatmin="0" extends="id:105"> | |
| <structref name="Header" id="111" structure="id:110"/> | |
| <structure name="Marshal data" id="112" length="0" order="variable"> | |
| <structref name="Element" id="114" repeatmax="-1" structure="id:113"/> | |
| </structure> | |
| </structure> | |
| <structure name="Version 3.0" id="117" repeatmin="0" extends="id:105"> | |
| <structref name="Header" id="119" structure="id:118"/> | |
| <structure name="Marshal data" id="120" length="0" alignment="0" order="variable"> | |
| <structref name="Element" id="122" repeatmax="-1" structure="id:121"/> | |
| </structure> | |
| </structure> | |
| <structure name="Version 3.3" id="125" repeatmin="0" extends="id:105"> | |
| <structref name="Header" id="127" structure="id:126"/> | |
| <structure name="Marshal data" id="128" length="0" alignment="0" order="variable"> | |
| <structref name="Element" id="129" repeatmax="-1" structure="id:121"/> | |
| </structure> | |
| </structure> | |
| <structure name="Header (Python 2)" id="110" length="8" repeatmin="0" extends="id:105"> | |
| <number name="Magic Number" id="132" fillcolor="F72D17" type="integer" length="2"/> | |
| <binary name="CRLF" id="133" fillcolor="F9AF2D" length="2"/> | |
| <custom name="Timestamp" id="134" fillcolor="26FFFF" length="4" script="id:43"/> | |
| </structure> | |
| <structure name="Header (Python 3.0)" id="118" length="8" repeatmin="0" extends="id:105"> | |
| <number name="Magic Number" id="136" fillcolor="F72D17" type="integer" length="2"/> | |
| <binary name="CRLF" id="137" fillcolor="F9AF2D" length="2"/> | |
| <custom name="Timestamp" id="138" fillcolor="26FFFF" length="4" script="id:43"/> | |
| </structure> | |
| <structure name="Header (Python 3.2)" id="126" length="12" repeatmin="0" extends="id:105"> | |
| <number name="Magic Number" id="140" fillcolor="F72D17" type="integer" length="2"/> | |
| <binary name="CRLF" id="141" fillcolor="F9AF2D" length="2"/> | |
| <custom name="Timestamp" id="142" fillcolor="26FFFF" length="4" script="id:43"/> | |
| <number name="Size" id="143" fillcolor="0FD8FF" type="integer" length="4"/> | |
| </structure> | |
| <structure name="Code (Python 2)" id="145" repeatmin="0" extends="id:105"> | |
| <binary name="type" mustmatch="yes" id="146" fillcolor="007FFF" length="1"> | |
| <fixedvalues> | |
| <fixedvalue name="Code" value="63"/> | |
| </fixedvalues> | |
| </binary> | |
| <number name="argcount" id="147" fillcolor="BF0C86" type="integer" length="4"/> | |
| <number name="nlocals" id="148" fillcolor="BF581D" type="integer" length="4"/> | |
| <number name="stacksize" id="149" fillcolor="FF7600" type="integer" length="4"/> | |
| <binary name="flags" id="150" fillcolor="F9AF2D" length="4"/> | |
| <structref name="code" id="152" structure="id:151"/> | |
| <structref name="consts" id="154" structure="id:153"/> | |
| <structref name="names" id="155" structure="id:153"/> | |
| <structref name="varnames" id="156" structure="id:153"/> | |
| <structref name="freevars" id="157" structure="id:153"/> | |
| <structref name="cellvars" id="158" structure="id:153"/> | |
| <structref name="filename" id="159" structure="id:151"/> | |
| <structref name="name" id="160" structure="id:151"/> | |
| <number name="firstlineno" id="161" fillcolor="FB82D7" type="integer" length="4"/> | |
| <structref name="lnotab" id="162" structure="id:151"/> | |
| </structure> | |
| <structure name="Code (Python 3)" id="164" repeatmin="0" extends="id:105"> | |
| <binary name="type" mustmatch="yes" id="165" fillcolor="007FFF" length="1"> | |
| <fixedvalues> | |
| <fixedvalue name="Code" value="63"/> | |
| </fixedvalues> | |
| </binary> | |
| <number name="argcount" id="166" fillcolor="BF0C86" type="integer" length="4"/> | |
| <number name="nlocals" id="167" fillcolor="BF581D" type="integer" length="4"/> | |
| <number name="stacksize" id="168" fillcolor="FF7600" type="integer" length="4"/> | |
| <binary name="flags" id="169" fillcolor="F9AF2D" length="8"/> | |
| <structref name="code" id="170" structure="id:151"/> | |
| <structref name="consts" id="172" structure="id:171"/> | |
| <structref name="names" id="173" structure="id:171"/> | |
| <structref name="varnames" id="174" structure="id:171"/> | |
| <structref name="freevars" id="175" structure="id:171"/> | |
| <structref name="cellvars" id="176" structure="id:171"/> | |
| <structref name="filename" id="177" structure="id:151"/> | |
| <structref name="name" id="178" structure="id:151"/> | |
| <number name="firstlineno" id="179" fillcolor="FB82D7" type="integer" length="4"/> | |
| <structref name="lnotab" id="180" structure="id:151"/> | |
| </structure> | |
| <structure name="String" id="182" repeatmin="0" extends="id:105"> | |
| <binary name="type" mustmatch="yes" id="183" fillcolor="007FFF" length="1"> | |
| <fixedvalues> | |
| <fixedvalue name="String" value="73"/> | |
| <fixedvalue name="Unicode" value="75"/> | |
| <fixedvalue name="InternedString" value="74"/> | |
| </fixedvalues> | |
| </binary> | |
| <number name="length" id="184" fillcolor="38EC0D" type="integer" length="4"/> | |
| <string name="data" id="185" fillcolor="00B80B" repeatmin="0" type="fixed-length" length="length"/> | |
| </structure> | |
| <structure name="Type" id="187" disabled="yes" extends="id:105"> | |
| <binary name="type" id="188" disabled="yes" fillcolor="007FFF" length="1"> | |
| <fixedvalues> | |
| <fixedvalue name="Ellipsis" value="2E"/> | |
| <fixedvalue name="Null" value="30"/> | |
| <fixedvalue name="None" value="4E"/> | |
| <fixedvalue name="True" value="54"/> | |
| <fixedvalue name="False" value="46"/> | |
| <fixedvalue name="Code" value="63"/> | |
| <fixedvalue name="Float" value="66"/> | |
| <fixedvalue name="Binary Float" value="67"/> | |
| <fixedvalue name="Int" value="69"/> | |
| <fixedvalue name="Int64" value="49"/> | |
| <fixedvalue name="Long" value="6C"/> | |
| <fixedvalue name="String Ref" value="52"/> | |
| <fixedvalue name="String" value="73"/> | |
| <fixedvalue name="StopIteration" value="53"/> | |
| <fixedvalue name="Interned String" value="74"/> | |
| <fixedvalue name="Unicode" value="75"/> | |
| <fixedvalue name="Complex" value="78"/> | |
| <fixedvalue name="Binary Complex" value="79"/> | |
| <fixedvalue name="Tuple" value="28"/> | |
| <fixedvalue name="List" value="5B"/> | |
| <fixedvalue name="Dict" value="7B"/> | |
| <fixedvalue name="Set" value="3C"/> | |
| <fixedvalue name="Frozenset" value="3E"/> | |
| <fixedvalue name="Unknown" value="3F"/> | |
| </fixedvalues> | |
| </binary> | |
| </structure> | |
| <structure name="TupleLikes (Python 2)" id="153" repeatmin="0" extends="id:105"> | |
| <binary name="type" mustmatch="yes" id="190" fillcolor="007FFF" length="1"> | |
| <fixedvalues> | |
| <fixedvalue name="Tuple" value="28"/> | |
| <fixedvalue name="List" value="5B"/> | |
| <fixedvalue name="Set" value="3C"/> | |
| <fixedvalue name="Frozenset" value="3E"/> | |
| </fixedvalues> | |
| </binary> | |
| <number name="length" id="191" fillcolor="8503C2" type="integer" length="4"/> | |
| <structref name="element" id="192" repeatmax="length" structure="id:113"/> | |
| </structure> | |
| <structure name="TupleLikes (Python 3)" id="171" repeatmin="0" extends="id:105"> | |
| <binary name="type" mustmatch="yes" id="194" fillcolor="007FFF" length="1"> | |
| <fixedvalues> | |
| <fixedvalue name="Tuple" value="28"/> | |
| <fixedvalue name="List" value="5B"/> | |
| <fixedvalue name="Set" value="3C"/> | |
| <fixedvalue name="Frozenset" value="3E"/> | |
| </fixedvalues> | |
| </binary> | |
| <number name="length" id="195" fillcolor="8503C2" type="integer" length="4"/> | |
| <structref name="element" id="196" repeatmax="length" structure="id:121"/> | |
| </structure> | |
| <structure name="Int" id="198" repeatmin="0" extends="id:105"> | |
| <binary name="type" mustmatch="yes" id="199" fillcolor="007FFF" length="1"> | |
| <fixedvalues> | |
| <fixedvalue name="Int" value="69"/> | |
| </fixedvalues> | |
| </binary> | |
| <number name="value" id="200" fillcolor="DC0713" type="integer" length="4" signed="yes"/> | |
| </structure> | |
| <structure name="Int64" id="202" repeatmin="0" extends="id:105"> | |
| <binary name="type" mustmatch="yes" id="203" fillcolor="007FFF" length="1"> | |
| <fixedvalues> | |
| <fixedvalue name="Int64" value="49"/> | |
| </fixedvalues> | |
| </binary> | |
| <number name="value" id="204" fillcolor="DC0713" type="integer" length="8" signed="yes"/> | |
| </structure> | |
| <structure name="None" id="206" repeatmin="0" extends="id:105"> | |
| <binary name="type" mustmatch="yes" id="207" fillcolor="007FFF" length="1"> | |
| <fixedvalues> | |
| <fixedvalue name="None" value="4E"/> | |
| </fixedvalues> | |
| </binary> | |
| </structure> | |
| <structure name="Float" id="209" repeatmin="0" extends="id:105"> | |
| <binary name="type" mustmatch="yes" id="210" fillcolor="007FFF" length="1"> | |
| <fixedvalues> | |
| <fixedvalue name="Float" value="66"/> | |
| </fixedvalues> | |
| </binary> | |
| <number name="length" id="211" fillcolor="BCBCDE" type="integer" length="1"/> | |
| <string name="value" id="212" fillcolor="8177FC" type="fixed-length" length="length"/> | |
| </structure> | |
| <structure name="BinaryFloat" id="214" repeatmin="0" extends="id:105"> | |
| <binary name="type" mustmatch="yes" id="215" fillcolor="007FFF" length="1"> | |
| <fixedvalues> | |
| <fixedvalue name="BinaryFloat" value="67"/> | |
| </fixedvalues> | |
| </binary> | |
| <number name="value" id="216" fillcolor="F80492" type="float" length="64" lengthunit="bit"/> | |
| </structure> | |
| <structure name="Complex" id="218" repeatmin="0" extends="id:105"> | |
| <binary name="type" mustmatch="yes" id="219" fillcolor="007FFF" length="1"> | |
| <fixedvalues> | |
| <fixedvalue name="Complex" value="78"/> | |
| </fixedvalues> | |
| </binary> | |
| <structref name="real" id="220" fillcolor="916C40" structure="id:209"/> | |
| <structref name="imag" id="221" fillcolor="CBBBA1" structure="id:209"/> | |
| </structure> | |
| <structure name="BinaryComplex" id="223" repeatmin="0" extends="id:105"> | |
| <binary name="type" mustmatch="yes" id="224" fillcolor="007FFF" length="1"> | |
| <fixedvalues> | |
| <fixedvalue name="BinaryComplex" value="79"/> | |
| </fixedvalues> | |
| </binary> | |
| <structref name="real" id="225" fillcolor="916C44" structure="id:214"/> | |
| <structref name="imag" id="226" fillcolor="CBBBA1" structure="id:214"/> | |
| </structure> | |
| <structure name="Dict (Python 2)" id="228" repeatmin="0" extends="id:105"> | |
| <binary name="type" mustmatch="yes" id="229" fillcolor="007FFF" length="1"> | |
| <fixedvalues> | |
| <fixedvalue name="Dict" value="7B"/> | |
| </fixedvalues> | |
| </binary> | |
| <structref name="element" id="230" fillcolor="FDACFD" repeatmax="-1" structure="id:113"/> | |
| <binary name="terminator" mustmatch="yes" id="231" fillcolor="F942A9" length="1"> | |
| <fixedvalues> | |
| <fixedvalue name="Null" value="30"/> | |
| </fixedvalues> | |
| </binary> | |
| </structure> | |
| <structure name="Dict (Python 3)" id="233" repeatmin="0" extends="id:105"> | |
| <binary name="type" mustmatch="yes" id="234" fillcolor="007FFF" length="1"> | |
| <fixedvalues> | |
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