def decrypt(TPM, TPM_other, ciphertext):
length_remaining = len(ciphertext)
key = ""
while length_remaining > TPM.input_num:
key += weight_to_string(TPM)
length_remaining -= TPM.input_num
key_exchange_one_only(TPM, TPM_other)
key += weight_to_string(TPM, length_remaining)
key_exchange_one_only(TPM, TPM_other)
return xor_strings(key, ciphertext)
y = TPM(500, 25, 1000)
x = TPM(500, 25, 1000)
synchronize(x, y, 500)
teststring = raw_input("Enter string to be encrypted: (Must be less than 500 characters):\n")
x_c = TPM(1, 1, 1)
y_c = TPM(1, 1, 1)
x.fullcopy(x_c)
y.fullcopy(y_c)
key_exchange_one_only(x_c, y_c)
testenc = encrypt(y, x_c, teststring)
print "Encrypted text is: ", testenc, "\n"
raw_input("Press enter to continue.")
new_plain = decrypt(x, y_c, testenc)
print "Decrypted text is: ", new_plain
