<?php
declare(strict_types=1);
namespace ParagonIE\Paseto\Tests;
use ParagonIE\ConstantTime\{
Base64UrlSafe,
Hex
};
use ParagonIE\Paseto\Util;
use PHPUnit\Framework\TestCase;
/**
* Class UtilTest
* @package ParagonIE\Paseto\Tests
*/
class UtilTest extends TestCase
{
/**
* @covers Util::HKDF()
* @ref https://tools.ietf.org/html/rfc5869
*
* @throws \Error
* @throws \TypeError
*/
public function testHKDFTestVectors()
{
$ikm = Hex::decode('0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b');
$salt = Hex::decode('000102030405060708090a0b0c');
$info = Hex::decode('f0f1f2f3f4f5f6f7f8f9');
$this->assertSame(
'3cb25f25faacd57a90434f64d0362f2a2d2d0a90cf1a5a4c5db02d56ecc4c5bf34007208d5b887185865',
Hex::encode(
Util::HKDF('sha256', $ikm, 42, $info, $salt)
),
'Test Case #1 from the RFC'
);
// Test case 2:
$ikm = Hex::decode(
'000102030405060708090a0b0c0d0e0f101112131415161718191a1b1c1d1e1f2021222324252627' .
'28292a2b2c2d2e2f303132333435363738393a3b3c3d3e3f404142434445464748494a4b4c4d4e4f'
);
$salt = Hex::decode(
'606162636465666768696a6b6c6d6e6f707172737475767778797a7b7c7d7e7f8081828384858687' .
'88898a8b8c8d8e8f909192939495969798999a9b9c9d9e9fa0a1a2a3a4a5a6a7a8a9aaabacadaeaf'
);
$info = Hex::decode(
'b0b1b2b3b4b5b6b7b8b9babbbcbdbebfc0c1c2c3c4c5c6c7c8c9cacbcccdcecfd0d1d2d3d4d5d6d7' .
'd8d9dadbdcdddedfe0e1e2e3e4e5e6e7e8e9eaebecedeeeff0f1f2f3f4f5f6f7f8f9fafbfcfdfeff'
);
$this->assertSame(
'b11e398dc80327a1c8e7f78c596a49344f012eda2d4efad8a050cc4c19afa97c59045a99cac7827271' .
'cb41c65e590e09da3275600c2f09b8367793a9aca3db71cc30c58179ec3e87c14c01d5c1f3434f1d87',
Hex::encode(
Util::HKDF('sha256', $ikm, 82, $info, $salt)
),
'Test Case #2 from the RFC'
);
$ikm = Hex::decode('0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b');
$this->assertSame(
'8da4e775a563c18f715f802a063c5a31b8a11f5c5ee1879ec3454e5f3c738d2d9d201395faa4b61a96c8',
Hex::encode(
Util::HKDF('sha256', $ikm, 42, '', '')
),
'Test Case #3 from the RFC'
);
}
/**
* @covers Util::preAuthEncode()
* @throws \TypeError
*/
public function testPreAuthEncode()
{
$this->assertSame(
'0000000000000000',
Hex::encode(Util::preAuthEncode(...[])),
'Empty array'
);
$this->assertSame(
'0000000000000000',
Hex::encode(Util::preAuthEncode()),
'Empty array'
);
$this->assertSame(
'01000000000000000000000000000000',
Hex::encode(Util::preAuthEncode(...[''])),
'Array of empty string'
);
$this->assertSame(
'01000000000000000000000000000000',
Hex::encode(Util::preAuthEncode('')),
'Array of empty string'
);
$this->assertSame(
'020000000000000000000000000000000000000000000000',
Hex::encode(Util::preAuthEncode(...['', ''])),
'Array of empty strings'
);
$this->assertSame(
'020000000000000000000000000000000000000000000000',
Hex::encode(Util::preAuthEncode('', '')),
'Array of empty strings'
);
$this->assertSame(
'0100000000000000070000000000000050617261676f6e',
Hex::encode(Util::preAuthEncode(...['Paragon'])),
'Array of non-empty string'
);
$this->assertSame(
'0100000000000000070000000000000050617261676f6e',
Hex::encode(Util::preAuthEncode('Paragon')),
'Array of non-empty string'
);
$this->assertSame(
'0200000000000000070000000000000050617261676f6e0a00000000000000496e6974696174697665',
Hex::encode(Util::preAuthEncode(...['Paragon', 'Initiative'])),
'Array of two non-empty strings'
);
$this->assertSame(
'0200000000000000070000000000000050617261676f6e0a00000000000000496e6974696174697665',
Hex::encode(Util::preAuthEncode('Paragon', 'Initiative')),
'Array of two non-empty strings'
);
$this->assertSame(
'0100000000000000190000000000000050617261676f6e0a00000000000000496e6974696174697665',
Hex::encode(Util::preAuthEncode(...[
'Paragon' . chr(10) . str_repeat("\0", 7) . 'Initiative'
])),
'Ensure that faked padding results in different prefixes'
);
$this->assertSame(
'0100000000000000190000000000000050617261676f6e0a00000000000000496e6974696174697665',
Hex::encode(Util::preAuthEncode(
'Paragon' . chr(10) . str_repeat("\0", 7) . 'Initiative'
)),
'Ensure that faked padding results in different prefixes'
);
}
/**
* @covers Util::validateAndRemoveFooter()
*/
public function testValidateAndRemoveFooter()
{
$token = Base64UrlSafe::encode(random_bytes(30));
$footer = random_bytes(10);
$combined = $token . '.' . Base64UrlSafe::encodeUnpadded($footer);
$this->assertSame(
$token,
Util::validateAndRemoveFooter($combined, $footer)
);
try {
Util::validateAndRemoveFooter($combined, 'wrong');
$this->fail('Invalid footer was accepted');
} catch (\Exception $ex) {
}
}
}
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