def decrypt():
print("Preparing to decrypt...")
data = get_decrypt_input()
while True:
cypher = input(
"1 : Ceaser (shift) Cypher\n2 : Block Cypher\n3 : Diffie-Hellman Cypher\nPlease select a cypher (1, 2, or 3): "
)
try:
cypher = int(cypher)
except ValueError:
print("Sorry, {} is not a valid choice. Pick 1, 2, or 3.".format(
cypher))
continue
if cypher == 1:
decrypted = shift_cypher(data[0], -data[1])
break
elif cypher == 2:
chunk_list = list(map(int, data[0].split("\n")))
chunk_list = block_unshift(chunk_list, data[1])
decrypted = block_rebuild(chunk_list)
break
elif cypher == 3:
shared_key = dh_shared_key(data[1], dh_public_key)
decrypted = dh_unshift(data[0], shared_key)
break
elif cypher == 0:
return
print("The decrypted message is:\n'{}'".format(decrypted))
return
def decrypt():
print("Preparing to decrypt...")
data = get_decrypt_input()
while True:
cypher = input(
"1 : Ceaser (shift) Cypher\n2 : Block Cypher\n3 : Diffie-Hellman Cypher\nPlease select a cypher (1, 2, or 3): "
)
try:
cypher = int(cypher)
except ValueError:
white = "\x1b[0m"
escape = "\x1b["
color = "31m"
text = ("Sorry, '{}' is not a valid choice. Pick 1, 2, or 3.".
format(cypher))
colored_text = escape + color + text + white
print(colored_text)
continue
if cypher == 1:
decrypted = shift_cypher(data[0], -data[1])
break
elif cypher == 2:
chunk_list = list(map(int, data[0].split("\n")))
chunk_list = block_unshift(chunk_list, data[1])
decrypted = block_rebuild(chunk_list)
break
elif cypher == 3:
#msg_public_key = dh_base ** data[1] % dh_mod
shared_key = dh_shared_key(dh_private_key, data[1])
decrypted = dh_unshift(data[0], shared_key)
break
# encryption
#msg_public_key = dh_base ** data[1] % dh_mod
#shared_key = dh_shared_key(dh_private_key, msg_public_key)
#encrypted = dh_shift(data[0], shared_key)
elif cypher == 0:
return
print("The decrypted message is:\n'{}'".format(decrypted))
return