def handle_des(client_socket):
print "[*] The connection is encrypted with DES"
# waiting for key
print "[*] Waiting for key..."
try:
key_text = client_socket.recv(1024)
client_socket.send("Key received!")
except:
client_socket.close()
print "[*] Remote client is closed."
return
print "[*] Key accepted. Waiting for messages..."
while True:
try:
cipher_text = client_socket.recv(1024)
if cipher_text:
print "[*] Received: %s" % cipher_text
print "[*] Plain text is: %s" % DES.decrypt(cipher_text, key_text)
client_socket.send("ACK!")
except:
client_socket.close()
print "[*] Remote client is closed."
return
# Author: soachishti ([email protected]) # Link: http://page.math.tu-berlin.de/~kant/teaching/hess/krypto-ws2006/des.htm from des import DES d = DES() print "\n" + "=" * 5 + "HEX Demo" + "=" * 5 + "\n" hex_message = "0123456789abcdef" key = "133457799BBCDFF1" # Must be hex encryted = d.encrypt(hex_message, key) decrypted = d.decrypt(encryted, key) print "Message: ", hex_message print "Key: ", key print "Encryted: ", encryted print "Decrypted: ", decrypted print "\n" + "=" * 5 + "ASCII Demo" + "=" * 5 + "\n" ascii_message = "OwaisAli" hex_message = d.process_message(ascii_message) encryted = d.encrypt(hex_message, key) decrypted = d.decrypt(encryted, key) print "ASCII Message: ", ascii_message print "Hex Message: ", hex_message print "Key: ", key print "Encryted: ", encryted print "Decrypted: ", decrypted.decode('hex').split('\0')[0]
from des import DES
while True:
mode = input('Select DES mode (E: Encryption, D: Decryption)\nor Enter Q to quit\nSelection: ')
if mode == 'Q' or mode == 'q':
break
elif mode == 'E' or mode == 'e':
key = input('Enter the key in hex: ')
plain = input('Enter the plain text in hex: ')
des = DES(key=key, plain=plain)
print('Cipher text: ' + des.encrypt())
elif mode == 'D' or mode == 'd':
key = input('Enter the key in hex: ')
cipher = input('Enter the cipher text in hex: ')
des = DES(key=key, cipher=cipher)
print('Plain text: ' + des.decrypt())
print()
def decrypt(self):
key = self.textEdit_2.toPlainText()
encrypt_text = self.textEdit_3.toPlainText()
encrypt_text_ = base64.b64decode(encrypt_text.encode('utf-8'))
des = DES()
decrypt_text = des.decrypt(key, encrypt_text_)
from des import DES
d = DES('qwertyui')
cipher = d.encrypt('hello world!')
print(cipher)
deciphered = d.decrypt(cipher, msg_in_bits=True)
print(deciphered)
def main(f_input="input.txt"):
cipher = DES()
#cipher.encrypt("abcdefgh")
c = cipher.encrypt(f_input)
p = cipher.decrypt(c)
def handle_mix(client_socket):
# waiting for public key of the client
print "Wating for public key of the client"
try:
pub_key_string_client = client_socket.recv(2048)
pub_key_array_client = pub_key_string_client.split(',')
pub_key_client = (long(pub_key_array_client[0]), long(pub_key_array_client[1]))
except:
client_socket.close()
print "\n[*] Connection is broke."
return
print "[*] Client public key accepted."
print pub_key_client
prime_length = 512
rsaKeys = rsa.RSAKey()
pub_key_server, priv_key_server = rsaKeys.gen_keys(prime_length)
# send public key
print "[*] Keys generated. Sending public key to the client..."
pub_key_string_server = str(pub_key_server[0]) + "," + str(pub_key_server[1])
print pub_key_string_server
try:
client_socket.send(pub_key_string_server)
except:
client_socket.close()
print "\n[*] Connection is broke."
return
# waiting for des key
print "[*] Waiting for des key..."
cipher_des_key = client_socket.recv(4096)
des_key = rsaKeys.decrypt(priv_key_server, cipher_des_key.split())
client_socket.send("Key received!")
# waiting for messages...
print "[*] Key accepted. Waiting for messages..."
while True:
try:
cipher_digest = client_socket.recv(102400)
print cipher_digest
if cipher_digest:
print "[*] Received cipher digest: %s" % cipher_digest
plain_digest = rsaKeys.decrypt(pub_key_client, cipher_digest.split())
print "[*] Plain digest is: %s" % plain_digest
client_socket.send("Digest Received!")
cipher_text = client_socket.recv(2048)
client_socket.send("Message Received!")
if cipher_text:
print "[*] Received cipher text: \n%s" % cipher_text
plain_text = DES.decrypt(cipher_text, des_key)
print "[*] Plain text is: \n %s" % DES.decrypt(cipher_text, des_key)
sha1_degist = sha1.sha1(plain_text)
print "[*] Real digest: [%s]" % sha1_degist
if sha1_degist == plain_digest:
print "[*] The message is from correct client."
else:
print"[*] The message was tampered."
except:
client_socket.close()
print "\n[*] Connection is broke."
return
