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Add Diffie-Hellman Test to BigInteger Testcase.

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This commit is contained in:
Andreas Fischer 2014-04-13 00:35:24 +02:00
parent 431e3a04c7
commit e839fa80a3
1 changed files with 38 additions and 0 deletions
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38
tests/Math/BigInteger/TestCase.php
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@ -265,4 +265,42 @@ abstract class Math_BigInteger_TestCase extends PhpseclibTestCase
$this->assertSame('18446744073709551616', (string) $x);
$this->assertSame('18446744073709551616', (string) $y);
}
public function testDiffieHellmanKeyAgreement()
{
// "Oakley Group 14" 2048-bit modular exponentiation group as used in
// SSH2 diffie-hellman-group14-sha1
$prime = $this->getInstance(
'FFFFFFFFFFFFFFFFC90FDAA22168C234C4C6628B80DC1CD1' .
'29024E088A67CC74020BBEA63B139B22514A08798E3404DD' .
'EF9519B3CD3A431B302B0A6DF25F14374FE1356D6D51C245' .
'E485B576625E7EC6F44C42E9A637ED6B0BFF5CB6F406B7ED' .
'EE386BFB5A899FA5AE9F24117C4B1FE649286651ECE45B3D' .
'C2007CB8A163BF0598DA48361C55D39A69163FA8FD24CF5F' .
'83655D23DCA3AD961C62F356208552BB9ED529077096966D' .
'670C354E4ABC9804F1746C08CA18217C32905E462E36CE3B' .
'E39E772C180E86039B2783A2EC07A28FB5C55DF06F4C52C9' .
'DE2BCBF6955817183995497CEA956AE515D2261898FA0510' .
'15728E5A8AACAA68FFFFFFFFFFFFFFFF',
16
);
$generator = $this->getInstance(2);
$one = $this->getInstance(1);
$max = $one->bitwise_leftShift(512)->subtract($one);
$alicePrivate = $one->random($one, $max);
$alicePublic = $generator->modPow($alicePrivate, $prime);
$bobPrivate = $one->random($one, $max);
$bobPublic = $generator->modPow($bobPrivate, $prime);
$aliceShared = $bobPublic->modPow($alicePrivate, $prime);
$bobShared = $alicePublic->modPow($bobPrivate, $prime);
$this->assertTrue(
$aliceShared->equals($bobShared),
'Failed asserting that Alice and Bob share the same BigInteger.'
);
}
}