def decryptMessage(msg, keys):
ciphertext = msg.encrypted_message.ciphertext
nonce = msg.encrypted_message.nonce
try:
plaintextBytes = nacl.bindings.crypto_secretbox_open(
ciphertext, nonce, keys[0])
decrypted = nstp_v4_pb2.DecryptedMessage()
decrypted.ParseFromString(plaintextBytes)
print("DECRYPTED MESSAGE\n", decrypted)
return decrypted
except nacl.exceptions.CryptoError:
print("Bad key")
return error_message("Failed to decrypt given message")
def ping_response(data):
response = nstp_v4_pb2.DecryptedMessage()
response.ping_response.hash = data
return response
def load_response(value):
response = nstp_v4_pb2.DecryptedMessage()
response.load_response.value = value
return response
def store_response(hashedValue):
response = nstp_v4_pb2.DecryptedMessage()
response.store_response.hash = hashedValue
response.store_response.hash_algorithm = 0
return response
def authentication_response(decision, user, authenticated):
response = nstp_v4_pb2.DecryptedMessage()
response.auth_response.authenticated = decision
return response, user, authenticated