44 lines
918 B
Python
Executable File
44 lines
918 B
Python
Executable File
#!/usr/bin/env python
|
|
import sys
|
|
import struct
|
|
from Crypto.PublicKey import RSA
|
|
|
|
def egcd(a, b):
|
|
if a == 0:
|
|
return (b, 0, 1)
|
|
else:
|
|
g, y, x = egcd(b % a, a)
|
|
return (g, x - (b // a) * y, y)
|
|
|
|
def modinv(a, m):
|
|
g, x, y = egcd(a, m)
|
|
if g != 1:
|
|
raise Exception('modular inverse does not exist')
|
|
else:
|
|
return x % m
|
|
|
|
def to_c_string(x):
|
|
mod = (hex(x)[2:-1].rjust(0x100, '0'))
|
|
hh = ''.join('\\x'+mod[i:i+2] for i in range(0, 0x100, 2))
|
|
return hh
|
|
|
|
def to_c_uint32(x):
|
|
nums = []
|
|
for i in range(0x20):
|
|
nums.append(x%(2**32))
|
|
x /= (2**32)
|
|
return "{"+'U,'.join(map(str, nums))+"U}"
|
|
|
|
rsa = RSA.importKey(open(sys.argv[1]).read())
|
|
rr = pow(2**1024, 2, rsa.n)
|
|
n0inv = 2**32 - modinv(rsa.n, 2**32)
|
|
|
|
print 'RSAPublicKey rsa_key = {.len = 0x20,'
|
|
print ' .n0inv = %dU,' % n0inv
|
|
print ' .n = %s,' % to_c_uint32(rsa.n)
|
|
print ' .rr = %s,' % to_c_uint32(rr)
|
|
print ' .exponent = %d,' % rsa.e
|
|
print '};'
|
|
|
|
|