from helper import *
from generate_keys import gen_keys
# Asymmetric encryption
def encrypt(msg, public_key):
h, q, g = public_key
k = rand_coprime_with(q) # Private key for sender
s = power(h, k, q)
en_msg = []
for i in range(0, len(msg)):
en_msg.append(msg[i])
for i in range(0, len(en_msg)):
en_msg[i] = s * ord(en_msg[i])
p = power(g, k, q)
cipher = [p, en_msg]
return cipher
if __name__ == '__main__':
public_key, private_key = gen_keys()
print("Enter Message to be encoded : ")
msg = input()
cipher = encrypt(msg, public_key)
print(cipher)
def decrypt(cipher, keys):
public_key, private_key = keys
n, _ = public_key
d = private_key[0]
en_msg = cipher[0]
hlen = 20 # SHA-1 hash length
k = ceil(n.bit_length() / 8)
assert len(en_msg) == k
assert k >= 2 * hlen + 2
dr_msg = pow(os2ip(en_msg), d, n)
dr_msg = i2osp(dr_msg, k)
dr_msg = oaep_decode(dr_msg, k).decode()
return dr_msg
if __name__ == '__main__':
keys = gen_keys(256)
public_key, private_key = keys
print(public_key, private_key)
print("Enter Message to be encoded : ")
msg = input()
cipher = encrypt(msg, public_key)
print(cipher)
decoded_text = decrypt(cipher, keys)
print(decoded_text)
from helper import *
from generate_keys import gen_keys
from encrypt import encrypt
def decrypt(cipher, keys):
public_key, private_key = keys
h, q, g = public_key
a = private_key[0]
p, en_msg = cipher
dr_msg = []
h = power(p, a, q)
for i in range(0, len(en_msg)):
dr_msg.append(chr(int(en_msg[i] / h)))
return dr_msg
if __name__ == '__main__':
keys = gen_keys()
public_key, private_key = keys
print("Enter Message to be encoded : ")
msg = input()
cipher = encrypt(msg, public_key)
print(cipher)
decoded_text = decrypt(cipher, keys)
print(decoded_text)
from helper import *
from generate_keys import gen_keys
from encrypt import encrypt
def decrypt(cipher, keys):
public_key, private_key = keys
n, e = public_key
d = private_key[0]
en_msg = cipher[0]
dr_msg = pow(en_msg, d, n)
dr_msg = i2osp(dr_msg, n.bit_length() // 8).decode()
return dr_msg
if __name__ == '__main__':
keys = gen_keys(128)
public_key, private_key = keys
print(public_key, private_key)
print("Enter Message to be encoded : ")
msg = input()
cipher = encrypt(msg, public_key)
print(cipher)
decoded_text = decrypt(cipher, keys)
print(decoded_text)
from generate_keys import gen_keys
from encrypt import encrypt
def decrypt(cipher, keys):
public_key, private_key = keys
n, e = public_key
d = private_key[0]
en_msg = cipher[0]
dr_msg = []
for i in range(0, len(en_msg)):
dr_msg.append(chr(power(en_msg[i], d, n)))
# dr_msg = power(en_msg, d, n)
return dr_msg
if __name__ == '__main__':
keys = gen_keys(16)
public_key, private_key = keys
print(public_key, private_key)
print("Enter Message to be encoded : ")
msg = input()
# msg = int(input())
cipher = encrypt(msg, public_key)
print(cipher)
decoded_text = decrypt(cipher, keys)
print(decoded_text)