mirror of
https://github.com/fail0verflow/mini.git
synced 2024-11-16 16:39:25 +01:00
50 lines
1.1 KiB
Python
50 lines
1.1 KiB
Python
|
#!/bin/env python
|
||
|
|
|
||
|
|
import sys, os, struct, sha
|
||
|
|
|
||
|
|
loaderfile = sys.argv[1]
|
||
|
|
elffile = sys.argv[2]
|
||
|
|
outfile = sys.argv[3]
|
||
|
|
|
||
|
|
data = open(loaderfile,"rb").read()
|
||
|
|
|
||
|
|
hdrlen, loaderlen, elflen, arg = struct.unpack(">IIII",data[:16])
|
||
|
|
|
||
|
|
if hdrlen < 0x10:
|
||
|
|
print "ERROR: header length is 0x%x, expected at least 0x10"%hdrlen
|
||
|
|
sys.exit(1)
|
||
|
|
|
||
|
|
loaderoff = hdrlen
|
||
|
|
elfoff = loaderoff + loaderlen
|
||
|
|
elfend = elfoff + elflen
|
||
|
|
|
||
|
|
hdr = data[:hdrlen]
|
||
|
|
loader = data[loaderoff:elfoff]
|
||
|
|
|
||
|
|
elf = open(elffile,"rb").read()
|
||
|
|
|
||
|
|
if elflen > 0:
|
||
|
|
print "WARNING: loader already contains ELF, will replace"
|
||
|
|
|
||
|
|
elflen = len(elf)
|
||
|
|
|
||
|
|
if loaderlen < len(loader):
|
||
|
|
print "ERROR: loader is larger than its reported length"
|
||
|
|
sys.exit(1)
|
||
|
|
|
||
|
|
if loaderlen > len(loader):
|
||
|
|
print "Padding loader with 0x%x zeroes"%(loaderlen-len(loader))
|
||
|
|
loader += "\x00"*(loaderlen-len(loader))
|
||
|
|
|
||
|
|
newdata = struct.pack(">IIII", hdrlen, loaderlen, elflen, 0) + hdr[16:]
|
||
|
|
newdata += loader
|
||
|
|
newdata += elf
|
||
|
|
|
||
|
|
print "Header: 0x%x bytes"%(hdrlen)
|
||
|
|
print "Loader: 0x%x bytes"%(loaderlen)
|
||
|
|
print "ELF: 0x%x bytes"%(elflen)
|
||
|
|
|
||
|
|
f = open(outfile,"wb")
|
||
|
|
f.write(newdata)
|
||
|
|
f.close()
|