def getPublicKey( name, addr ) :
s = socket.socket( socket.AF_INET, socket.SOCK_STREAM )
s.connect( addr )
s.send( 'getpubkey %s\n' % name )
line = ''
while 1 :
data = s.recv( 1 )
line += data
if data == '\n' : break
s.close()
result,pubKeyData = line.split()
assert result == 'OK'
publicKey = RSAKey()
publicKey.fromDER_PublicKey( pubKeyData.decode('hex') )
return publicKey
def verifySignature(publicKey, data, updateLevel, signature):
payload = encode(('DHT-DATA', data, updateLevel))
if type(publicKey) is str:
k = RSAKey()
try:
k.fromDER_PublicKey(publicKey)
except RSAError:
return False
else:
k = publicKey
try:
digest = Digest(digestType).digest(payload)
k.verify(signature, digest, digestType)
return True
except RSAError:
return False
def verifySignature( publicKey, data, updateLevel, signature ) :
payload = encode( ('DHT-DATA',data,updateLevel) )
if type(publicKey) is str :
k = RSAKey()
try :
k.fromDER_PublicKey( publicKey )
except RSAError :
return False
else :
k = publicKey
try :
digest = Digest(digestType).digest( payload )
k.verify( signature, digest, digestType )
return True
except RSAError :
return False
def _doConnectPubKey( self, words ) :
if len(words) != 2 :
self._writeError( 'Malformed request' )
return
hexPubKey, service = words
if not self.session.isOnline() :
self._writeError( 'Not online' )
return
try :
pubKeyData = hexDecode( hexPubKey )
pubKey = RSAKey()
pubKey.fromDER_PublicKey( pubKeyData )
except (HexDecodeError,RSAError) :
self._writeError( 'Malformed publickey' )
return
self._connectInternal( pubKey, service )
def loadProfile(entry, password):
ps = profileSettings()
userName = ps.getData(entry + '/Name')
keyId = ps.getData(entry + '/KeyID')
encKey = ps.getData(entry + '/PrivateKey')
rsaKey = RSAKey()
try:
rsaKey.fromPEM_PrivateKey(encKey, password)
except RSAError:
return None
profile = Profile(rsaKey, userName, keyId, entry)
contactsData = ps.getData(entry + '/ContactList', '')
for line in contactsData.split('\n'):
line = line.strip()
if not line: continue
name, hexKey = line.split(':')
assert isValidUserName(name)
pubKey = RSAKey()
pubKey.fromDER_PublicKey(hexDecode(hexKey))
contact = Contact(pubKey, name)
profile.addContact(contact)
return profile
