def loop_handler(connection, address, _pk, _sk):
while True:
try:
res = ElGamal.decrypt(pickle.loads(connection.recv(4096)), pk,
sk) # デシリアライズ -> 復号
for value in clients:
if value[1][0] == address[0] and value[1][1] == address[1]:
print('Client({}, {}) : {}'.format(value[1][0],
value[1][1], res))
else:
value[0].send('Client({}, {}) : {}'.format(
value[1][0], value[1][1], res).encode())
pass
except Exception as e:
print(e)
break
def test_ElGamal(num_bit, message):
print("\n------------------------------------------------------")
# Generate random prime numbers
p = BlumBlumShub.generate_prime(num_bit)
# Test generate_keypair which returns public key ( g, p, h) and the private key (g, p, x)
public, private = ElGamal.generate_keypair(p)
print("\n------------------------------------------------------")
encrypted_msg = ElGamal.encrypt(public, message)
print("\n------------------------------------------------------")
decrypted_msg = ElGamal.decrypt(private, encrypted_msg)
print("\n------------------------------------------------------")
eve_decrypted_msg = ElGamal.eve(public, encrypted_msg)
return decrypted_msg, eve_decrypted_msg
connection, address = socket.accept()
print('Client connected: ', address)
print('Key bits ?')
bits = int(input('> '))
print('OK, Your', str(bits)+'-bit keys are:')
pk, sk = ElGamal.gen_key(bits=bits)
print('public:', pk) # 公開鍵
print('secret:', sk) # 秘密鍵
line = str(pk[0])+' '+str(pk[1])+' '+str(pk[2])
connection.send(line.encode("UTF-8")) # 公開鍵を送る
print('Given the client the public key ...')
data = connection.recv(4096).decode() # クライアントからの応答を確認
print('Client:', data)
# 無限ループ byeの入力でループを抜ける
while True:
# クライアントからデータを受信
recvline = ElGamal.decrypt(pickle.loads(connection.recv(4096)), pk, sk) # デシリアライズ -> 復号
if recvline == 'bye':
break
else:
print('Client:', recvline)
# クローズ
connection.close()
socket.close()
print('Server side closed.')
def ElGamalDecryption(p, q, x, r, t):
return ElGamal.decrypt(p, q, x, r, t)
# If encryption algorithm is RSA
if type_encryption == "1":
result = [int(x.strip()) for x in private.split(',')]
private_key = (result[0], result[1])
# Decrypt with RSA Algorithm
RSA.decrypt(private_key, encrypted_msg)
# If encryption algorithm is El-Gamal
elif type_encryption == "2":
result = [int(x.strip()) for x in private.split(',')]
# Decrypt with El-Gamal Algorithm
ElGamal.decrypt((result[0], result[1], result[2]),
encrypted_msg)
# Otherwise, function 4 - Eavesdrop and decrypt the message
elif function == "4":
# Get the encrypted message from user
encrypted_msg = input("Please enter encrypted message : ")
# Get the public key from user
public = input(
"Please enter the public key ((g, p, h) for El-Gamal / (e,n) for RSA ): "
)
print(
"\n------------------------------------------------------"
)
