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import subprocess
import tempfile
import os
import sys
import select
from sploit.until import bind
from sploit.util.log import *
class Comm:
logonread = True
logonwrite = False
flushonwrite = True
readonwrite = False
timeout = 250 # milliseconds
last = None # result of last discrete read
def __init__(self, backend):
self.back = backend
def shutdown(self):
try:
self.back.stdout.close()
except BrokenPipeError:
pass
def read(self, size=-1):
if size < 0:
return self.readall_nonblock()
elif size == 0:
data = b''
else:
data = self.back.stdin.read(size)
if(data == b''):
raise BrokenPipeError('Tried to read on broken pipe')
if self.logonread : ilog(data, file=sys.stdout, color=NORMAL)
self.last = data
return data
def readline(self):
data = self.back.stdin.readline()
if(data == b''):
raise BrokenPipeError('Tried to read on broken pipe')
if data.endswith(b'\n'):
data = data[:-1]
if self.logonread : ilog(data, file=sys.stdout, color=NORMAL)
self.last = data
return data
def readall(self):
data = b''
try:
for line in self.back.stdin:
tolog = (line[:-1] if line.endswith(b'\n') else line)
if self.logonread : ilog(tolog, file=sys.stdout, color=NORMAL)
data += line
except KeyboardInterrupt:
pass
self.last = data
return data
def readall_nonblock(self):
try:
data = b''
os.set_blocking(self.back.stdin.fileno(), False)
poll = select.poll()
poll.register(self.back.stdin, select.POLLIN)
while True:
poll.poll(self.timeout)
d = self.readall()
if len(d) == 0:
self.last = data
return data
data += d
finally:
os.set_blocking(self.back.stdin.fileno(), True)
def readuntil(self, pred, /, *args, **kwargs):
data = b''
pred = bind(pred, *args, **kwargs)
l = self.logonread
self.logonread = False
try:
while(True):
data += self.read(1)
if(pred(data)):
break
finally:
self.logonread = l
if self.logonread : ilog(data, file=sys.stdout, color=NORMAL)
self.last = data
return data
def readlineuntil(self, pred, /, *args, **kwargs):
dataarr = []
pred = bind(pred, *args, **kwargs)
while(True):
dataarr.append(self.readline())
if(pred(dataarr)):
break
self.last = dataarr
return dataarr
def write(self, data):
self.back.stdout.write(data)
if self.flushonwrite : self.back.stdout.flush()
if self.logonwrite : ilog(data, file=sys.stdout, color=ALT)
if self.readonwrite : self.readall_nonblock()
def writeline(self, data=b''):
self.write(data + b'\n')
def interact(self):
stdin = sys.stdin.buffer
event = select.POLLIN
def readall_stdin():
try:
os.set_blocking(stdin.fileno(), False)
for line in stdin:
self.write(line)
finally:
os.set_blocking(stdin.fileno(), True)
readtable = {
self.back.stdin.fileno(): self.readall_nonblock,
stdin.fileno(): readall_stdin,
}
try:
ilog("<--Interact Mode-->")
l = self.logonread
self.logonread = True
poll = select.poll()
poll.register(self.back.stdin, event)
poll.register(stdin, event)
readtable[self.back.stdin.fileno()]()
while True:
for fd, e in poll.poll(self.timeout):
if not e & event: return
readtable[fd]()
except KeyboardInterrupt:
pass
finally:
self.logonread = l
ilog("<--Interact Mode Done-->")
def popen(cmdline=''):
io = Comm((Process(cmdline.split()) if len(cmdline) > 0 else Pipes()))
io.readall_nonblock()
io.readonwrite = True
return io
class Process:
def __init__(self, args):
ilog(f"Running: {' '.join(args)}")
self.proc = subprocess.Popen(args,
stdin=subprocess.PIPE,
stdout=subprocess.PIPE,
stderr=subprocess.STDOUT,
preexec_fn=lambda : os.setpgrp())
ilog(f"PID: {self.proc.pid}")
self.stdin = self.proc.stdout
self.stdout = self.proc.stdin
def __del__(self):
if getattr(self, 'proc', None) == None : return
if(self.proc.poll() != None):
return
try:
ilog("Waiting on Target Program to End...")
ilog("Press Ctrl+C to Forcefully Kill It...")
self.proc.wait()
except KeyboardInterrupt:
self.proc.kill()
class Pipes:
def __init__(self, tmp=None):
if(tmp == None):
self.dir = tempfile.TemporaryDirectory()
dirname = self.dir.name
else:
if(not os.path.exists(tmp)):
os.mkdir(tmp)
dirname = tmp
self.pathin = os.path.join(dirname, "in")
self.pathout = os.path.join(dirname, "out")
os.mkfifo(self.pathin)
os.mkfifo(self.pathout)
ilog("Waiting on Target to Connect...", file=sys.stdout)
ilog(f"<{self.pathin} >{self.pathout}", file=sys.stdout)
self.stdout = open(self.pathin, "wb")
self.stdin = open(self.pathout, "rb")
ilog("Connected!")
def __del__(self):
try:
if getattr(self,'stdout',None) : self.stdout.close()
if getattr(self,'stdin',None) : self.stdin.close()
except BrokenPipeError:
pass
if getattr(self,'pathin',None) and os.path.exists(self.pathin) : os.unlink(self.pathin)
if getattr(self,'pathout',None) and os.path.exists(self.pathout) : os.unlink(self.pathout)
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