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node_modules/crypto-browserify/test/node/dh.js

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+'use strict';
+
+var test = require('tape');
+var cryptoB = require('../../');
+var crypto = require('crypto');
+var satisfies = require('semver').satisfies;
+
+test('diffie-hellman mod groups', function (t) {
+	[
+		'modp1',
+		'modp2',
+		'modp5',
+		'modp14',
+		'modp15',
+		'modp16'
+	].forEach(function (mod) {
+		t.test(mod, function (st) {
+			st.plan(3);
+			var dh1 = cryptoB.getDiffieHellman(mod);
+			var p1 = dh1.getPrime().toString('hex');
+			dh1.generateKeys();
+
+			var dh2 = crypto.getDiffieHellman(mod);
+			var p2 = dh2.getPrime().toString('hex');
+			dh2.generateKeys();
+			st.equals(p1, p2, 'equal primes');
+
+			var pubk1 = dh1.getPublicKey();
+			var pubk2 = dh2.getPublicKey();
+			st.notEquals(pubk1, pubk2, 'diff public keys');
+
+			var pub1 = dh1.computeSecret(pubk2).toString('hex');
+			var pub2 = dh2.computeSecret(pubk1).toString('hex');
+			st.equals(pub1, pub2, 'equal secrets');
+		});
+	});
+});
+
+test('diffie-hellman key lengths', function (t) {
+	[
+		64,
+		65,
+		192,
+		512,
+		1024
+	].forEach(function (len) {
+		var modulusTooSmall = satisfies(process.version, '>= 17') && len < 512;
+		t.test(String(len), { skip: modulusTooSmall && 'node 17+ requires a length >= 512' }, function (st) {
+			var dh2 = cryptoB.createDiffieHellman(len);
+			var prime2 = dh2.getPrime();
+			var p2 = prime2.toString('hex');
+			var dh1 = crypto.createDiffieHellman(prime2);
+			var p1 = dh1.getPrime().toString('hex');
+			dh1.generateKeys();
+			dh2.generateKeys();
+			st.equals(p1, p2, 'equal primes');
+
+			var pubk1 = dh1.getPublicKey();
+			var pubk2 = dh2.getPublicKey();
+			st.notEquals(pubk1, pubk2, 'diff public keys');
+
+			var pub1 = dh1.computeSecret(pubk2).toString('hex');
+			var pub2 = dh2.computeSecret(dh1.getPublicKey()).toString('hex');
+			st.equals(pub1, pub2, 'equal secrets');
+
+			st.end();
+		});
+	});
+});