dh

Documentation

Overview

Copyright 2024 The Bombus Authors

Use of this source code is governed by a MIT style license that can be found in the LICENSE file.

Package dh Diffie–Hellman key exchange ***********************************************************

*
* Diffie–Hellman key exchange
*
* 1. Alice and Bob agree to use a prime number p = 23 and base g = 5.
*
* 2. Alice chooses a secret integer a = 6, then sends Bob A = g^a mod p
* 		A = 5^6 mod 23
* 		A = 15,625 mod 23
* 		A = 8
*
* 3. Bob chooses a secret integer b = 15, then sends Alice B = g^b mod p
* 		B = 5^15 mod 23
* 		B = 30,517,578,125 mod 23
* 		B = 19
*
* 4. Alice computes s = B^a mod p
* 		s = 19^6 mod 23
* 		s = 47,045,881 mod 23
* 		s = 2
*
* 5. Bob computes s = A^b mod p
*	 	s = 8^15 mod 23
* 		s = 35,184,372,088,832 mod 23
* 		s = 2
*
* 6. Alice and Bob now share a secret (the number 2) because 6 × 15 is the same as 15 × 6

*

Index

• Variables
• func DHExchange() (*big.Int, *big.Int)
• func DHKey(SECRET, MODPOWER *big.Int) *big.Int

Variables

var (
	DH1BASE     = big.NewInt(3)
	DH1PRIME, _ = big.NewInt(0).SetString("0x7FFFFFC3", 0)
	MAXINT64    = big.NewInt(math.MaxInt64)
)

Functions

func DHExchange

func DHExchange() (*big.Int, *big.Int)

DHExchange Diffie-Hellman Key-exchange

func DHKey

func DHKey(SECRET, MODPOWER *big.Int) *big.Int