def test():
print("Generating dummy certificates")
# CA.get_instance().generateDummyCertificates(n=10)
print("creating the sender alice")
alice = Sender("alice.main.py", persist=True)
print("creating the receiver bob")
bob = Receiver("bob.main.py", persist=True)
plainText = "hello bob, this is me alice from main.py file :)"
messagePath = alice.sendTo(bob.id, message=plainText)
sendInfo = alice.lastSendInfo
with open(messagePath) as messageFile:
recText = messageFile.read()
bob.onReceive(recText)
recInfo = bob.lastRecInfo
print("plain text at sender", plainText)
plainText2 = recInfo.get("plainText", None)
print("plain text at receiver", plainText2)
assert plainText == plainText2, "different values of sended message and received one"
print("does the message signature valid ?", recInfo.get("messageVer"))
def test():
print("Generating dummy certificates")
# CA.get_instance().generateDummyCertificates(n=10)
print("creating the true sender alice")
alice = Sender("alice.extra.py", persist=True)
print("creating the receiver bob")
bob = Receiver("bob.extra.py", persist=True)
plainText = "hello bob, this is me alice from extra.py file :)"
messagePath = alice.sendTo(bob.id, message=plainText)
sendInfo = alice.lastSendInfo
with open(messagePath) as messageFile:
recTextOrig = messageFile.read()
print("making an attack, try to change the message sended")
recText = recTextOrig
recJson = json.loads(recText)
recJson["message"] += "56" # only one new char
recText = json.dumps(recJson)
try:
bob.onReceive(recText)
assert False, "receive should throw exception but it doesn't"
except ValueError as e:
print("value error because this message can't be decrypted")
print(
"try to change the whole message content using bob public key (all people know the public key)"
)
recText = recTextOrig
recJson = json.loads(recText)
import rsa
from sender import strHexOfBytes
evilMessage = "this is an evil message from attacker"
recJson["message"] = strHexOfBytes(rsa.encrypt(evilMessage, bob.publicKey))
recText = json.dumps(recJson)
bob.onReceive(recText)
lastInfo = bob.lastRecInfo
print(lastInfo.get("plainText"))
print("does the message signature valid ?", lastInfo.get("messageVer"))
