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In Lab01Code function is_point_on_curve change == to is #7

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In Lab01Code function is_point_on_curve change == to is #7

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40 changes: 20 additions & 20 deletions Lab01Basics/Lab01Code.py
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Original file line number Diff line number Diff line change
Expand Up @@ -5,7 +5,7 @@
# an end-to-end encryption system.
#
# Run the tests through:
# $ py.test-2.7 -v Lab01Tests.py
# $ py.test-2.7 -v Lab01Tests.py

###########################
# Group Members: TODO
Expand All @@ -14,13 +14,13 @@

#####################################################
# TASK 1 -- Ensure petlib is installed on the System
# and also pytest. Ensure the Lab Code can
# and also pytest. Ensure the Lab Code can
# be imported.

import petlib

#####################################################
# TASK 2 -- Symmetric encryption using AES-GCM
# TASK 2 -- Symmetric encryption using AES-GCM
# (Galois Counter Mode)
#
# Implement a encryption and decryption function
Expand All @@ -34,13 +34,13 @@ def encrypt_message(K, message):
""" Encrypt a message under a key K """

plaintext = message.encode("utf8")

## YOUR CODE HERE

return (iv, ciphertext, tag)

def decrypt_message(K, iv, ciphertext, tag):
""" Decrypt a cipher text under a key K
""" Decrypt a cipher text under a key K

In case the decryption fails, throw an exception.
"""
Expand Down Expand Up @@ -78,7 +78,7 @@ def is_point_on_curve(a, b, p, x, y):
assert (isinstance(x, Bn) and isinstance(y, Bn)) \
or (x == None and y == None)

if x == None and y == None:
if x is None and y is None:
return True

lhs = (y * y) % p
Expand All @@ -102,7 +102,7 @@ def point_add(a, b, p, x0, y0, x1, y1):

# ADD YOUR CODE BELOW
xr, yr = None, None

return (xr, yr)

def point_double(a, b, p, x, y):
Expand All @@ -115,7 +115,7 @@ def point_double(a, b, p, x, y):
yr = lam * (xp - xr) - yp (mod p)

Returns the point representing the double of the input (x, y).
"""
"""

# ADD YOUR CODE BELOW
xr, yr = None, None
Expand Down Expand Up @@ -174,17 +174,17 @@ def point_scalar_multiplication_montgomerry_ladder(a, b, p, x, y, scalar):
#####################################################
# TASK 4 -- Standard ECDSA signatures
#
# - Implement a key / param generation
# - Implement a key / param generation
# - Implement ECDSA signature using petlib.ecdsa
# - Implement ECDSA signature verification
# - Implement ECDSA signature verification
# using petlib.ecdsa

from hashlib import sha256
from petlib.ec import EcGroup
from petlib.ecdsa import do_ecdsa_sign, do_ecdsa_verify

def ecdsa_key_gen():
""" Returns an EC group, a random private key for signing
""" Returns an EC group, a random private key for signing
and the corresponding public key for verification"""
G = EcGroup()
priv_sign = G.order().random()
Expand Down Expand Up @@ -214,7 +214,7 @@ def ecdsa_verify(G, pub_verify, message, sig):
# - Use Bob's public key to encrypt a message.
# - Use Bob's private key to decrypt the message.
#
# NOTE:
# NOTE:

def dh_get_key():
""" Generate a DH key pair """
Expand All @@ -225,29 +225,29 @@ def dh_get_key():


def dh_encrypt(pub, message, aliceSig = None):
""" Assume you know the public key of someone else (Bob),
""" Assume you know the public key of someone else (Bob),
and wish to Encrypt a message for them.
- Generate a fresh DH key for this message.
- Derive a fresh shared key.
- Use the shared key to AES_GCM encrypt the message.
- Optionally: sign the message with Alice's key.
"""

## YOUR CODE HERE
pass

def dh_decrypt(priv, ciphertext, aliceVer = None):
""" Decrypt a received message encrypted using your public key,
of which the private key is provided. Optionally verify
""" Decrypt a received message encrypted using your public key,
of which the private key is provided. Optionally verify
the message came from Alice using her verification key."""

## YOUR CODE HERE
pass

## NOTE: populate those (or more) tests
# ensure they run using the "py.test filename" command.
# What is your test coverage? Where is it missing cases?
# $ py.test-2.7 --cov-report html --cov Lab01Code Lab01Code.py
# $ py.test-2.7 --cov-report html --cov Lab01Code Lab01Code.py

def test_encrypt():
assert False
Expand All @@ -261,9 +261,9 @@ def test_fails():
#####################################################
# TASK 6 -- Time EC scalar multiplication
# Open Task.
#
#
# - Time your implementations of scalar multiplication
# (use time.clock() for measurements)for different
# (use time.clock() for measurements)for different
# scalar sizes)
# - Print reports on timing dependencies on secrets.
# - Fix one implementation to not leak information.
Expand Down