Viewing file:  PublicKey.py (1.45 KB) -rw-r--r--
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"""M2Crypto PGP2.
Copyright (c) 1999-2003 Ng Pheng Siong. All rights reserved."""
from constants import *
from packet import *
import RSA
class PublicKey:
def __init__(self, pubkey_pkt):
self._pubkey_pkt = pubkey_pkt
self._pubkey = RSA.new_pub_key((pubkey_pkt._e, pubkey_pkt._n))
self._userid = {}
self._signature = {}
def keyid(self):
return self._pubkey.n[-8:]
def add_userid(self, u_pkt):
assert isinstance(u_pkt, userid_packet)
self._userid[u_pkt.userid()] = u_pkt
def remove_userid(self, userid):
del self._userid[userid]
def add_signature(self, userid, s_pkt):
assert isinstance(s_pkt, signature_packet)
assert self._userid.has_key(userid)
if self._signature.has_key(userid):
self._signature.append(s_pkt)
else:
self._signature = [s_pkt]
def __getitem__(self, id):
return self._userid[id]
def __setitem__(self, *args):
raise NotImplementedError
def __delitem__(self, id):
del self._userid[id]
if self._signature[id]:
del self._signature[id]
def write(self, stream):
pass
def encrypt(self, ptxt):
# XXX Munge ptxt into pgp format.
return self._pubkey.public_encrypt(ptxt, RSA.pkcs1_padding)
def decrypt(self, ctxt):
# XXX Munge ctxt into pgp format.
return self._pubkey.public_encrypt(ctxt, RSA.pkcs1_padding)
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