Diffie-Hellman Challenge | Interactive Brokers

The Diffie-Hellman challenge value is the quotient of modulus division, converted to a hex string. Using ‘2’ as our generator, raised to the power of our Diffie-Hellman random value, divided by our Diffie-Hellman Prime or Modulus value.

Python

C#

1 # Replace with path to DH param PEM file.
2 with open("./dhparam.pem, "r") as f:
3     dh_param = RSA.importKey(f.read())
4     dh_prime = dh_param.n # Also known as DH Modulus
5     dh_generator = dh_param.e  # always =2
6 
7 # Convert result to hex and remove leading 0x chars.
8 dh_challenge = hex(pow(base=dh_generator, exp=dh_random, mod=dh_prime))[2:]