Module « Crypto.PublicKey.ElGamal »

Fonction construct - module Crypto.PublicKey.ElGamal

Signature de la fonction construct

def construct(tup) 

Description

construct.__doc__

Construct an ElGamal key from a tuple of valid ElGamal components.

    The modulus *p* must be a prime.

    The following conditions must apply:

    - 1 < g < p-1
    - g^{p-1} = 1 mod p
    - 1 < x < p-1
    - g^x = y mod p

    :Parameters:
        tup : tuple
            A tuple of long integers, with 3 or 4 items
            in the following order:

            1. Modulus (*p*).
            2. Generator (*g*).
            3. Public key (*y*).
            4. Private key (*x*). Optional.

    :Return: An ElGamal key object (`ElGamalobj`).