def emit_thumb(self, opcode):
"""16 bit thumb instructions"""
da = darm.disasm_thumb(opcode)
s = '?'
if da:
s = str(da)
self.ui.put('%08x: %04x %s\n' % (self.pc, opcode, s))
self.pc += 2
def emit_thumb(self, opcode):
"""16 bit thumb instructions"""
da = darm.disasm_thumb(opcode)
s = '?'
if da:
s = str(da)
self.ui.put('%08x: %04x %s\n' % (self.pc, opcode, s))
self.pc += 2
import struct
import darm # https://github.com/jbremer/darm
# Read RAM dump.
dump = ""
with open("DUMP.BIN", "rb") as f:
dump = f.read()
# Read decrypted launcher.
data = ""
with open("Launcher.dat", "rb") as f:
data = f.read()
# Format entries.
for i in xrange(len(data)/4):
v = struct.unpack("<I", data[i*4:i*4+4])[0]
inst = ""
if v >= 0x100000 and v <= 0x252000: # This is gonna work just fine.
if v & 1:
addr = (v - 0x100000) & 0xFFFFFFFE
inst = darm.disasm_thumb(struct.unpack("<H", dump[addr:addr+2])[0])
else:
addr = v - 0x100000
inst = darm.disasm_armv7(struct.unpack("<I", dump[addr:addr+4])[0])
if inst == None:
print "{0:08X}: {1:08X}".format(i*4, v)
else:
print "{0:08X}: {1:08X} - {2}".format(i*4, v, inst)
else:
print "{0:08X}: {1:08X}".format(i*4, v)
# "encrypted" data retrieved directly from the binary
encrypted = [
0xcaa9e1a1, 0xcae9e1a3, 0xca29e1ad, 0xca69e1af, 0xcba9e1a9,
0xcbe9e1ab, 0x7454edda, 0xaae7f8eb, 0x8ad3c78a, 0xc4c58ada,
0x9999c6d9, 0xcb8ac6cf, 0xcfcc8ae3, 0xc8dfcfde,
]
# "decrypted"
decrypted = [_ ^ 0xaaaaaaaa for _ in encrypted]
# 16bit thumb instructions
insns = sum(([_ & 0xffff, _ >> 16] for _ in decrypted), [])
off, s = 0, ''
for ins in insns:
value, d = '', darm.disasm_thumb(ins)
# load a literal
if str(d.instr) == 'LDR' and str(d.Rn) == 'PC':
value = struct.pack('I', decrypted[(off + d.imm + 4) / 4])
s += value
# return
elif str(d.instr) == 'BX':
break
print '#%d' % off, str(d), repr(value)
off += 2
print 'Key:', s