<?php
/**
* Class X25519Test
*/
class X25519Test extends PHPUnit_Framework_TestCase
{
/**
* @before
*/
public function before()
{
ParagonIE_Sodium_Compat::$disableFallbackForUnitTests = true;
}
/**
* @covers ParagonIE_Sodium_Crypto::scalarmult_base()
* @throws SodiumException
* @throws TypeError
*/
public function testScalarmultBase()
{
$alice_secret = ParagonIE_Sodium_Core_Util::hex2bin('69f208412d8dd5db9d0c6d18512e86f0ec75665ab841372d57b042b27ef89d8c');
$alice_public = ParagonIE_Sodium_Core_Util::hex2bin('ac3a70ba35df3c3fae427a7c72021d68f2c1e044040b75f17313c0c8b5d4241d');
if (PHP_INT_SIZE === 4) {
$this->assertSame(
bin2hex($alice_public),
bin2hex(ParagonIE_Sodium_Crypto32::scalarmult_base($alice_secret))
);
} else {
$this->assertSame(
bin2hex($alice_public),
bin2hex(ParagonIE_Sodium_Crypto::scalarmult_base($alice_secret))
);
}
}
/**
* @covers ParagonIE_Sodium_Core_X25519::crypto_scalarmult_curve25519_ref10_base()
* @throws SodiumException
* @throws TypeError
*/
public function testRef10()
{
$staticSk = ParagonIE_Sodium_Core_Util::hex2bin(
'b75b0a8b25c58aaef1d14fc9ce2bbaeac607407d1ade104aeaa196f8ac13b93f'
);
$staticPk = ParagonIE_Sodium_Core_Util::hex2bin(
'9b29186b7afb95caf85ceabc9687fd1a5d82290170075b519d6a449c751bb337'
);
$secretKey = random_bytes(32);
if (PHP_INT_SIZE === 4) {
$publicKey = ParagonIE_Sodium_Core32_X25519::crypto_scalarmult_curve25519_ref10_base($secretKey);
$this->assertSame(
ParagonIE_Sodium_Core32_Util::bin2hex(
ParagonIE_Sodium_Core32_X25519::crypto_scalarmult_curve25519_ref10($staticSk, $publicKey)
),
ParagonIE_Sodium_Core32_Util::bin2hex(
ParagonIE_Sodium_Core32_X25519::crypto_scalarmult_curve25519_ref10($secretKey, $staticPk)
),
'Elliptic Curve Diffie-Hellman over Curve25519 is failing'
);
} else {
$publicKey = ParagonIE_Sodium_Core_X25519::crypto_scalarmult_curve25519_ref10_base($secretKey);
$this->assertSame(
ParagonIE_Sodium_Core_Util::bin2hex(
ParagonIE_Sodium_Core_X25519::crypto_scalarmult_curve25519_ref10($staticSk, $publicKey)
),
ParagonIE_Sodium_Core_Util::bin2hex(
ParagonIE_Sodium_Core_X25519::crypto_scalarmult_curve25519_ref10($secretKey, $staticPk)
),
'Elliptic Curve Diffie-Hellman over Curve25519 is failing'
);
}
}
/**
* @requires PHPUnit < 8
* @expectedException SodiumException
* @throws SodiumException
* @throws TypeError
*/
public function testScalarmultZeroForLegacyPhpUnit()
{
$aliceSk = ParagonIE_Sodium_Core_Util::hex2bin(
'b75b0a8b25c58aaef1d14fc9ce2bbaeac607407d1ade104aeaa196f8ac13b93f'
);
$bobPk = ParagonIE_Sodium_Core_Util::hex2bin(
str_repeat('0', 64)
);
$this->assertNotSame(
$bobPk,
ParagonIE_Sodium_Core_Util::bin2hex(
ParagonIE_Sodium_Compat::crypto_scalarmult($aliceSk, $bobPk)
),
'test'
);
}
/**
* @requires PHPUnit 8
* @throws SodiumException
* @throws TypeError
*/
public function testScalarmultZero()
{
$aliceSk = ParagonIE_Sodium_Core_Util::hex2bin(
'b75b0a8b25c58aaef1d14fc9ce2bbaeac607407d1ade104aeaa196f8ac13b93f'
);
$bobPk = ParagonIE_Sodium_Core_Util::hex2bin(
str_repeat('0', 64)
);
$this->expectException('SodiumException');
$this->assertNotSame(
$bobPk,
ParagonIE_Sodium_Core_Util::bin2hex(
ParagonIE_Sodium_Compat::crypto_scalarmult($aliceSk, $bobPk)
),
'test'
);
}
}
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