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rsa_decrypt_testkey.py
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193 lines (143 loc) · 4.35 KB
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# coding: utf-8
import hashlib
import time
import os
from Crypto.Cipher import PKCS1_v1_5
from Crypto.PublicKey import RSA
from Crypto.Hash import SHA
from Crypto.Random import get_random_bytes
from Crypto import Random
import binascii
from onlykey import OnlyKey, Message
print 'Initialize OnlyKey client...'
ok = OnlyKey()
print 'Done'
print
time.sleep(2)
ok.read_string(timeout_ms=100)
empty = 'a'
while not empty:
empty = ok.read_string(timeout_ms=100)
time.sleep(1)
print 'You should see your OnlyKey blink 3 times'
print
print 'Enter RSA slot number to use for decryption (1 - 4)'
print
slot = int(raw_input())
print 'Trying to read the public RSA N part 1...'
ok.send_message(msg=Message.OKGETPUBKEY, payload=chr(slot)) #, payload=[1, 1])
time.sleep(1.5)
for _ in xrange(10):
ok_pubkey1 = ok.read_bytes(64, to_str=True, timeout_ms=1000)
if len(ok_pubkey1) == 64:
break
time.sleep(1)
print
print 'received=', repr(ok_pubkey1)
print 'Trying to read the public RSA N part 2...'
for _ in xrange(10):
ok_pubkey2 = ok.read_bytes(64, to_str=True, timeout_ms=1000)
if len(ok_pubkey2) == 64:
break
time.sleep(1)
print
print 'received=', repr(ok_pubkey2)
print 'Trying to read the public RSA N part 3...'
for _ in xrange(10):
ok_pubkey3 = ok.read_bytes(64, to_str=True, timeout_ms=1000)
if len(ok_pubkey3) == 64:
break
time.sleep(1)
print
print 'received=', repr(ok_pubkey3)
print 'Trying to read the public RSA N part 4...'
for _ in xrange(10):
ok_pubkey4 = ok.read_bytes(64, to_str=True, timeout_ms=1000)
if len(ok_pubkey4) == 64:
break
time.sleep(1)
print
print 'received=', repr(ok_pubkey4)
print 'Trying to read the public RSA N part 5...'
for _ in xrange(10):
ok_pubkey5 = ok.read_bytes(64, to_str=True, timeout_ms=1000)
if len(ok_pubkey5) == 64:
break
time.sleep(1)
print
print 'received=', repr(ok_pubkey5)
print 'Trying to read the public RSA N part 6...'
for _ in xrange(10):
ok_pubkey6 = ok.read_bytes(64, to_str=True, timeout_ms=1000)
if len(ok_pubkey6) == 64:
break
time.sleep(1)
print
print 'received=', repr(ok_pubkey6)
print 'Trying to read the public RSA N part 7...'
for _ in xrange(10):
ok_pubkey7 = ok.read_bytes(64, to_str=True, timeout_ms=1000)
if len(ok_pubkey7) == 64:
break
time.sleep(1)
print
print 'received=', repr(ok_pubkey7)
print 'Trying to read the public RSA N part 8...'
for _ in xrange(10):
ok_pubkey8 = ok.read_bytes(64, to_str=True, timeout_ms=1000)
if len(ok_pubkey8) == 64:
break
time.sleep(1)
print
print 'received=', repr(ok_pubkey8)
if not ok_pubkey2:
raise Exception('failed to set the RSA key')
print 'Received Public Key generated by OnlyKey'
ok_pubkey = ok_pubkey1 + ok_pubkey2 + ok_pubkey3 + ok_pubkey4 + ok_pubkey5 + ok_pubkey6 + ok_pubkey7 + ok_pubkey8
print 'Public N=', repr(ok_pubkey)
print
print 'Key Size =', len(ok_pubkey)
print
random_generator = Random.new().read
key = RSA.generate((len(ok_pubkey)*8), random_generator) #generate pub and priv key
ok_pubkey = ok_pubkey.encode("HEX")
n = long(ok_pubkey, 16)
e = int('10001', 16)
key = RSA.construct((n, e))
print 'N =', repr(key.n)
print
message = 'Secret message'
#h = SHA.new(message)
cipher = PKCS1_v1_5.new(key)
ciphertext = cipher.encrypt(message)
#hex_enc_data = bin2hex(enc_data)
print 'encrypted payload = ', repr(ciphertext)
print
# Compute the challenge pin
h = hashlib.sha256()
h.update(ciphertext)
d = h.digest()
assert len(d) == 32
def get_button(byte):
ibyte = ord(byte)
if ibyte < 6:
return 1
return ibyte % 5 + 1
b1, b2, b3 = get_button(d[0]), get_button(d[15]), get_button(d[31])
print 'Sending the payload to the OnlyKey...'
ok.send_large_message2(msg=Message.OKDECRYPT, payload=ciphertext, slot_id=slot)
print 'Please enter the 3 digit challenge code on OnlyKey (and press ENTER if necessary)'
print '{} {} {}'.format(b1, b2, b3)
raw_input()
print 'Trying to read the decrypted data from OnlyKey...'
ok_decrypted = ''
while ok_decrypted == '':
time.sleep(0.5)
ok_decrypted = ok.read_bytes(len(message), to_str=True)
print 'Decrypted by OnlyKey, data=', repr(ok_decrypted)
print 'Original Message =', repr(message)
print 'Assert that the original message matches the data generated on the OnlyKey'
assert repr(ok_decrypted) == repr(message)
print 'Ok, data matches'
print
print 'Done'