def rep(self, passphrase=None, algorithm=crypto.SYMALGORITHM_AES256):
passphrase = self.passphrase
keydata = self.d.rep() + self.p.rep() + self.q.rep() + self.u.rep()
s2kPart = '\x00'
if passphrase is not None and len(passphrase) > 0:
iv = crypto.randomBytes(crypto.SYMALGORITHM_BLOCKSIZE[algorithm])
s2k = S2KElement()
s2kPart = '\xfe' + chr(algorithm) + s2k.rep() + iv
keydata += crypto.hash_sha1(keydata)
keydata = crypto.encryptCFB(s2k.generateKey(passphrase, algorithm),
keydata, iv, algorithm)
else:
keydata += '\x00\x00'
data = (self.version.rep(1) + self.created.rep() + self.algorithm.rep(1) +
self.n.rep() + self.e.rep() + s2kPart + keydata)
return Packet.createHeader(self.TAG, len(data)) + data
def testHash(self):
self.assertEqual(crypto.hash_sha1('abc').encode('hex'),
'a9993e364706816aba3e25717850c26c9cd0d89d')
self.assertEqual(crypto.hash_sha256('abc').encode('hex'),
'ba7816bf8f01cfea414140de5dae2223b00361a396177a9cb410f'
'f61f20015ad')
self.assertEqual(crypto.hash_sha384('abc').encode('hex'),
'cb00753f45a35e8bb5a03d699ac65007272c32ab0eded1631a8b6'
'05a43ff5bed8086072ba1e7cc2358baeca134c825a7')
self.assertEqual(crypto.hash_sha512('abc').encode('hex'),
'ddaf35a193617abacc417349ae20413112e6fa4e89a97ea20a9ee'
'ee64b55d39a2192992a274fc1a836ba3c23a3feebbd454d442364'
'3ce80e2a9ac94fa54ca49f')
def __init__(self, s=None, length=0, passphraseCallback=None):
PublicKeyPacket.__init__(self, s)
self.passphrase = None
if s is None:
return
self.s2kUsage = ord(s.read(1))
if self.s2kUsage == 255 or self.s2kUsage == 254:
self.symAlgorithm = ord(s.read(1))
self.s2k = S2KElement(s)
self.iv = s.read(crypto.SYMALGORITHM_BLOCKSIZE[self.symAlgorithm])
encrypted = s.read(length - s.tell() + 3)
if passphraseCallback is None:
raise Exception('encrypted key and no passphraseCallback')
symkey = self.s2k.generateKey(passphraseCallback(), self.symAlgorithm)
decrypted = io.BytesIO(crypto.decryptCFB(symkey,
encrypted,
self.iv,
self.symAlgorithm))
self.d = MPIElement(decrypted)
self.p = MPIElement(decrypted)
self.q = MPIElement(decrypted)
self.u = MPIElement(decrypted)
if self.s2kUsage == 254:
self.checksum = decrypted.read(20)
if self.checksum != crypto.hash_sha1(decrypted.getvalue()[:-20]):
raise Exception('invalid passphrase')
else:
raise Exception('not implemented')
elif self.s2kUsage == 0:
self.d = MPIElement(s)
self.p = MPIElement(s)
self.q = MPIElement(s)
self.u = MPIElement(s)
self.checksum = s.read(2)
else:
raise Exception('not implemented')
def fingerprint(self):
return crypto.hash_sha1(self.hashdata())