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var test = require('tape');

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var crypto = require('diffie-hellman/browser');

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test('diffie-hellman mod groups', function (t) {

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  [

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     'modp1', 'modp2', 'modp5', 'modp14', 'modp15', 'modp16'

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  ].forEach(function (mod) {

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    t.test(mod, function (t){

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      t.plan(3);

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      var dh1 = crypto.getDiffieHellman(mod);

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      var p1 = dh1.getPrime().toString('hex');

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      dh1.generateKeys();

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      var dh2 = crypto.getDiffieHellman(mod);

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      var p2 = dh2.getPrime().toString('hex');

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      dh2.generateKeys();

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      t.equals(p1, p2, 'equal primes');

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      var pubk1 = dh1.getPublicKey();

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      var pubk2 = dh2.getPublicKey();

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      t.notEquals(pubk1, pubk2, 'diff public keys');

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      var pub1 = dh1.computeSecret(pubk2).toString('hex');

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      var pub2 = dh2.computeSecret(dh1.getPublicKey()).toString('hex');

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      t.equals(pub1, pub2, 'equal secrets');

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    });

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  });

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});

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test('diffie-hellman key lengths', function (t) {

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  [

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     64, 65, 192

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  ].forEach(function (len) {

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    t.test('' + len, function (t){

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      t.plan(3);

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      var dh2 = crypto.createDiffieHellman(len);

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      var prime2 = dh2.getPrime();

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      var p2 = prime2.toString('hex');

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      var dh1 = crypto.createDiffieHellman(prime2);

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      var p1 = dh1.getPrime().toString('hex');

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      dh1.generateKeys();

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      dh2.generateKeys();

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      t.equals(p1, p2, 'equal primes');

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      var pubk1 = dh1.getPublicKey();

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      var pubk2 = dh2.getPublicKey();

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      t.notEquals(pubk1, pubk2, 'diff public keys');

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      var pub1 = dh1.computeSecret(pubk2).toString('hex');

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      var pub2 = dh2.computeSecret(dh1.getPublicKey()).toString('hex');

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      t.equals(pub1, pub2, 'equal secrets');

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    });

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  });

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});

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