1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
|
# $Id$
"""Crypto driver for POW.pkix using M2Crypto.
This driver is part of an attempt to salvage the (really nice)
POW.pkix code from the POW package. I like POW well enough, but it's
old and missing some pieces and the Python world seems to have moved
to M2Crypto. But M2Crypto has nothing like POW.pkix, so I whacked
together an interface to let POW.pkix run over other crypto packages.
This module is a driver for M2Crypto.
"""
# NB: Module names may change eventually
import POW.pkix
class M2CryptoCryptoDriver(POW.pkix.CryptoDriver):
"""Dispatcher for crypto calls using M2Crypto package."""
def __init__(self):
import M2Crypto
self.driver2OID = {
"md5" : (1, 2, 840, 113549, 1, 1, 4), # md5WithRSAEncryption
"sha1" : (1, 2, 840, 113549, 1, 1, 5), # sha1withRSAEncryption
"ripemd160" : (1, 2, 840, 113549, 1, 1, 6), # ripemd160WithRSAEncryption
"sha256" : (1, 2, 840, 113549, 1, 1, 11), # sha256WithRSAEncryption
}
self.OID2driver = dict((v,k) for k,v in self.driver2OID.iteritems())
def sign(self, key, oid, plaintext):
digest = M2Crypto.EVP.MessageDigest(self.OID2driver[oid])
digest.update(plaintext)
return key.sign(digest.final(), self.OID2driver[oid])
def verify(self, key, oid, plaintext, signature):
return key.verify(plaintext, signature, self.OID2driver[oid])
def keyDER(self, key):
bio = M2Crypto.BIO.MemoryBuffer()
key.save_key_der_bio(bio)
return bio.read()
|
