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July 29, 2016 12:37
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[nodejs][javascript] Diffie-Hellman key exchange - nodejs v6
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"use strict"; | |
const assert = require("assert"); | |
const crypto = require("crypto"); | |
let server = crypto.createDiffieHellman(1024); | |
let prime = server.getPrime(); | |
console.log("Generate Alice's keys..."); | |
let alice = crypto.createDiffieHellman(prime); | |
let alicePublicKey = alice.generateKeys("base64"); | |
console.log("Generate Bob's keys..."); | |
let bob = crypto.createDiffieHellman(prime); | |
let bobPublicKey = bob.generateKeys("base64"); | |
console.log("Generate David's keys..."); | |
let david = crypto.createDiffieHellman(prime); | |
let davidPublicKey = david.generateKeys("base64"); | |
console.log("Exchange and generate the secret..."); | |
let aliceBobSecret = alice.computeSecret(bobPublicKey, "base64"); | |
let bobAliceSecret = bob.computeSecret(alicePublicKey, "base64"); | |
let davidAliceSecret = david.computeSecret(alicePublicKey, "base64"); | |
let aliceDavidSecret = alice.computeSecret(davidPublicKey, "base64"); | |
// console.log("alicePublicKey", alicePublicKey); | |
// console.log("bobPublicKey", bobPublicKey); | |
assert.notEqual(alicePublicKey, bobPublicKey); | |
console.log("alicePublicKey and bobPublicKey NOT equal"); | |
// console.log("aliceBobSecret", aliceBobSecret.toString("base64")); | |
// console.log("bobAliceSecret", bobAliceSecret.toString("base64")); | |
assert.equal(aliceBobSecret.toString("hex"), bobAliceSecret.toString("hex")); | |
console.log("aliceBobSecret and bobAliceSecret equal"); | |
console.log("----- Shared secret with 3rd person -----"); | |
// console.log("alicePublicKey", alicePublicKey); | |
// console.log("davidPublicKey", davidPublicKey); | |
assert.notEqual(alicePublicKey, davidPublicKey); | |
console.log("alicePublicKey and davidPublicKey NOT equal"); | |
// console.log("aliceDavidSecret", aliceDavidSecret.toString("base64")); | |
// console.log("davidAliceSecret", davidAliceSecret.toString("base64")); | |
assert.equal(aliceDavidSecret.toString("hex"), davidAliceSecret.toString("hex")); | |
console.log("aliceDavidSecret and davidAliceSecret equal"); |
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