def processPendingContacts(torId):
print("Process pending contact accept responses from:", torId)
foundReq = False
for resp in DbI.getPendingContactMessages(torId):
name = resp.get("fromName", None)
if not name:
profile = DbI.getProfile(torId)
name = profile["displayName"]
print("Found pending contact accept request from: ", name)
# Check signature using keyring
_, signatureKey = CryptoClient.decryptAndCheckSignature(
resp.get("encryptedMsg", None))
if signatureKey:
foundReq = True
# Insert new message into inbox with message contents
rowToStore = {
"messageType": "contactresponse",
"fromId": resp.get("fromId", None),
"fromName": name,
"accepted": True,
"messageBody": resp.get("messageBody", ""),
"timestamp": resp.get("timestamp", None),
"messageRead": True,
"messageReplied": True,
"recipients": DbI.getOwnTorid()
}
DbI.addToInbox(rowToStore)
if foundReq:
DbI.updateProfile(torId, {"status": "untrusted"})
# Delete all pending contact responses from this torId
DbI.deletePendingContactMessages(torId)
def construct(payload, isEncrypted=True):
'''Factory constructor using a given payload and extracting the fields'''
if not payload:
return None
signatureKey = None
if isEncrypted:
# Decrypt the payload with our key
decrypted, signatureKey = CryptoClient.decryptAndCheckSignature(
payload)
else:
decrypted = payload
if decrypted:
print("Asymmetric message, length of decrypted is", len(decrypted))
else:
print("Asymmetric message has no decrypted")
# Separate fields of message into common ones and the type-specific payload
msgType, subpayload, tstmp = AsymmetricMessage._stripFields(decrypted)
print("Recovered timestamp='", tstmp, "' (", len(tstmp), ")")
# Find a suitable subclass to call using the messageType
msg = None
if msgType == Message.TYPE_CONTACT_RESPONSE:
msg = ContactResponseMessage.constructFrom(subpayload)
elif msgType == Message.TYPE_STATUS_NOTIFY:
msg = StatusNotifyMessage.constructFrom(subpayload)
elif msgType == Message.TYPE_ASYM_MESSAGE:
msg = RegularMessage.constructFrom(subpayload)
elif msgType == Message.TYPE_INFO_REQUEST:
msg = InfoRequestMessage.constructFrom(subpayload)
elif msgType == Message.TYPE_INFO_RESPONSE:
msg = InfoResponseMessage.constructFrom(subpayload)
elif msgType == Message.TYPE_FRIEND_REFERRAL:
msg = ContactReferralMessage.constructFrom(subpayload)
elif msgType == Message.TYPE_FRIENDREFER_REQUEST:
msg = ContactReferRequestMessage.constructFrom(subpayload)
# Ask the message if it's ok to have no signature
if isEncrypted and msg:
if msg.acceptUnrecognisedSignature():
# Save the encrypted contents so we can verify it later
msg.encryptedContents = payload
elif not signatureKey:
msg = None
if msg:
try:
msgTimestamp = tstmp.decode('utf-8')
except:
msgTimestamp = msg.makeCurrentTimestamp()
msg.timestamp = Message.convertTimestampFromString(msgTimestamp)
msg.signatureKeyId = signatureKey
if signatureKey:
print(
"Asymm setting senderId because I've got a signatureKey: '%s'"
% signatureKey)
signatureId = DbI.findUserIdFromKeyId(signatureKey)
if signatureId:
msg.senderId = signatureId
return msg
def construct(payload, isEncrypted=True):
'''Factory constructor using a given payload and extracting the fields'''
if not payload:
return None
signatureKey = None
if isEncrypted:
# Decrypt the payload with our key
decrypted, signatureKey = CryptoClient.decryptAndCheckSignature(payload)
else:
decrypted = payload
if decrypted:
print("Asymmetric message, length of decrypted is", len(decrypted))
else:
print("Asymmetric message has no decrypted")
# Separate fields of message into common ones and the type-specific payload
msgType, subpayload, tstmp = AsymmetricMessage._stripFields(decrypted)
print("Recovered timestamp='", tstmp, "' (", len(tstmp), ")")
# Find a suitable subclass to call using the messageType
msg = None
if msgType == Message.TYPE_CONTACT_RESPONSE:
msg = ContactResponseMessage.constructFrom(subpayload)
elif msgType == Message.TYPE_STATUS_NOTIFY:
msg = StatusNotifyMessage.constructFrom(subpayload)
elif msgType == Message.TYPE_ASYM_MESSAGE:
msg = RegularMessage.constructFrom(subpayload)
elif msgType == Message.TYPE_INFO_REQUEST:
msg = InfoRequestMessage.constructFrom(subpayload)
elif msgType == Message.TYPE_INFO_RESPONSE:
msg = InfoResponseMessage.constructFrom(subpayload)
elif msgType == Message.TYPE_FRIEND_REFERRAL:
msg = ContactReferralMessage.constructFrom(subpayload)
# Ask the message if it's ok to have no signature
if isEncrypted and msg:
if msg.acceptUnrecognisedSignature():
# Save the encrypted contents so we can verify it later
msg.encryptedContents = payload
elif not signatureKey:
msg = None
if msg:
try:
msgTimestamp = tstmp.decode('utf-8')
except:
msgTimestamp = msg.makeCurrentTimestamp()
msg.timestamp = Message.convertTimestampFromString(msgTimestamp)
msg.signatureKeyId = signatureKey
if signatureKey:
print("Asymm setting senderId because I've got a signatureKey: '%s'" % signatureKey)
signatureId = DbClient.findUserIdFromKeyId(signatureKey)
if signatureId:
msg.senderId = signatureId
return msg
def testEncDecryption(self):
self._setupKeyring(["key1_private", "key1_public"])
MESSAGE = "This is the unencrypted source text we're going to use".encode("utf-8")
RECPTKEYID = self.KEYID_1
# encrypt for ourselves
ans = CryptoClient.encryptAndSign(MESSAGE, RECPTKEYID, RECPTKEYID)
self.assertIsNotNone(ans, "Encrypted result shouldn't be none")
backAgain, sigok = CryptoClient.decryptAndCheckSignature(ans)
self.assertIsNotNone(backAgain, "Decrypted result shouldn't be none")
self.assertTrue(sigok, "Signature check should be ok")
self.assertNotEqual(len(backAgain), 0, "Decrypted result shouldn't have zero length")
self.assertNotEqual(ans, MESSAGE, "Encrypted result shouldn't be the same as the input")
self.assertEqual(backAgain, MESSAGE, "Decrypted result should be the same as the input")
def testDecryptValid(self): self._setupKeyring(["key1_private", "key2_public"]) ENCRYPTED_MESSAGE = self.MESSAGE_FROM_2_FOR_1 backAgain, sigok = CryptoClient.decryptAndCheckSignature(ENCRYPTED_MESSAGE) self.assertIsNotNone(backAgain, "Decryption of valid data shouldn't give none") self.assertTrue(sigok, "Signature check should be ok")
def testDecryptUnrecognisedSig(self): self._setupKeyring(["key1_private"]) ENCRYPTED_MESSAGE = self.MESSAGE_FROM_2_FOR_1 backAgain, sigok = CryptoClient.decryptAndCheckSignature(ENCRYPTED_MESSAGE) self.assertIsNotNone(backAgain, "Decryption of encrypted text with unrecognised signature should still give a result") self.assertFalse(sigok, "Signature check should give false")
def testDecryptNotForMe(self): self._setupKeyring(["key1_public", "key2_private"]) ENCRYPTED_MESSAGE = self.MESSAGE_FROM_2_FOR_1 backAgain, sigok = CryptoClient.decryptAndCheckSignature(ENCRYPTED_MESSAGE) self.assertIsNone(backAgain, "Failed decryption should give none") self.assertFalse(sigok, "Signature check should give false")
def testDecryptBlank(self):
self._setupKeyring(["key1_private", "key1_public"])
backAgain, sigok = CryptoClient.decryptAndCheckSignature("")
self.assertIsNone(backAgain, "Decryption of empty string should give none")
self.assertFalse(sigok, "Signature check should give false")
def testDecryptPlaintext(self):
self._setupKeyring(["key1_private", "key1_public"])
MESSAGE = "This is the unencrypted source text we're going to use".encode("utf-8")
backAgain, sigok = CryptoClient.decryptAndCheckSignature(MESSAGE)
self.assertIsNone(backAgain, "Decryption of plaintext should give none")
self.assertFalse(sigok, "Signature check should give false")
