phpseclib/tests/Math/BigInteger/TestCase.php

269 lines
8.0 KiB
PHP

<?php
/**
* @author Andreas Fischer <bantu@phpbb.com>
* @copyright MMXII Andreas Fischer
* @license http://www.opensource.org/licenses/mit-license.html MIT License
*/
require_once 'Math/BigInteger.php';
abstract class Math_BigInteger_TestCase extends PhpseclibTestCase
{
static public function setUpBeforeClass()
{
parent::setUpBeforeClass();
self::reRequireFile('Math/BigInteger.php');
}
public function getInstance($x = 0, $base = 10)
{
return new Math_BigInteger($x, $base);
}
public function testConstructorBase2()
{
// 2**65 = 36893488147419103232
$this->assertSame('36893488147419103232', (string) $this->getInstance('1' . str_repeat('0', 65), 2));
}
public function testConstructorBase10()
{
$this->assertSame('18446744073709551616', (string) $this->getInstance('18446744073709551616'));
}
public function testConstructorBase16()
{
$this->assertSame('50', (string) $this->getInstance('0x32', 16));
$this->assertSame('12345678910', (string) $this->getInstance('0x2DFDC1C3E', 16));
$this->assertSame('18446744073709551615', (string) $this->getInstance('0xFFFFFFFFFFFFFFFF', 16));
$this->assertSame('18446744073709551616', (string) $this->getInstance('0x10000000000000000', 16));
}
public function testToBytes()
{
$this->assertSame(chr(65), $this->getInstance('65')->toBytes());
}
public function testToBytesTwosCompliment()
{
$this->assertSame(chr(126), $this->getInstance('01111110', 2)->toBytes(true));
}
public function testToHex()
{
$this->assertSame('41', $this->getInstance('65')->toHex());
}
public function testToBits()
{
$this->assertSame('1000001', $this->getInstance('65')->toBits());
}
public function testAdd()
{
$x = $this->getInstance('18446744073709551615');
$y = $this->getInstance( '100000000000');
$a = $x->add($y);
$b = $y->add($x);
$this->assertTrue($a->equals($b));
$this->assertTrue($b->equals($a));
$this->assertSame('18446744173709551615', (string) $a);
$this->assertSame('18446744173709551615', (string) $b);
}
public function testSubtract()
{
$x = $this->getInstance('18446744073709551618');
$y = $this->getInstance( '4000000000000');
$this->assertSame('18446740073709551618', (string) $x->subtract($y));
}
public function testMultiply()
{
$x = $this->getInstance('8589934592'); // 2**33
$y = $this->getInstance('36893488147419103232'); // 2**65
$a = $x->multiply($y); // 2**98
$b = $y->multiply($x); // 2**98
$this->assertTrue($a->equals($b));
$this->assertTrue($b->equals($a));
$this->assertSame('316912650057057350374175801344', (string) $a);
$this->assertSame('316912650057057350374175801344', (string) $b);
}
public function testDivide()
{
$x = $this->getInstance('1180591620717411303425'); // 2**70 + 1
$y = $this->getInstance('12345678910');
list($q, $r) = $x->divide($y);
$this->assertSame('95627922070', (string) $q);
$this->assertSame('10688759725', (string) $r);
}
public function testModPow()
{
$a = $this->getInstance('10');
$b = $this->getInstance('20');
$c = $this->getInstance('30');
$d = $a->modPow($b, $c);
$this->assertSame('10', (string) $d);
}
public function testModInverse()
{
$a = $this->getInstance(30);
$b = $this->getInstance(17);
$c = $a->modInverse($b);
$this->assertSame('4', (string) $c);
$d = $a->multiply($c);
list($q, $r) = $d->divide($b);
$this->assertSame('1', (string) $r);
}
public function testExtendedGCD()
{
$a = $this->getInstance(693);
$b = $this->getInstance(609);
$arr = $a->extendedGCD($b);
$this->assertSame('21', (string) $arr['gcd']);
$this->assertSame(21, $a->toString() * $arr['x']->toString() + $b->toString() * $arr['y']->toString());
}
public function testGCD()
{
$x = $this->getInstance(693);
$y = $this->getInstance(609);
$this->assertSame('21', (string) $x->gcd($y));
}
public function testAbs()
{
$x = $this->getInstance('-18446744073709551617');
$y = $x->abs();
$this->assertSame('-18446744073709551617', (string) $x);
$this->assertSame('18446744073709551617', (string) $y);
}
public function testEquals()
{
$x = $this->getInstance('18446744073709551616');
$y = $this->getInstance('18446744073709551616');
$this->assertTrue($x->equals($y));
$this->assertTrue($y->equals($x));
}
public function testCompare()
{
$a = $this->getInstance('-18446744073709551616');
$b = $this->getInstance('36893488147419103232');
$c = $this->getInstance('36893488147419103232');
$d = $this->getInstance('316912650057057350374175801344');
// a < b
$this->assertLessThan(0, $a->compare($b));
$this->assertGreaterThan(0, $b->compare($a));
// b = c
$this->assertSame(0, $b->compare($c));
$this->assertSame(0, $c->compare($b));
// c < d
$this->assertLessThan(0, $c->compare($d));
$this->assertGreaterThan(0, $d->compare($c));
}
public function testBitwiseAND()
{
$x = $this->getInstance('66666666666666666666666', 16);
$y = $this->getInstance('33333333333333333333333', 16);
$z = $this->getInstance('22222222222222222222222', 16);
$this->assertSame($z->toHex(), $x->bitwise_AND($y)->toHex());
}
public function testBitwiseOR()
{
$x = $this->getInstance('11111111111111111111111', 16);
$y = $this->getInstance('EEEEEEEEEEEEEEEEEEEEEEE', 16);
$z = $this->getInstance('FFFFFFFFFFFFFFFFFFFFFFF', 16);
$this->assertSame($z->toHex(), $x->bitwise_OR($y)->toHex());
}
public function testBitwiseXOR()
{
$x = $this->getInstance('AFAFAFAFAFAFAFAFAFAFAFAF', 16);
$y = $this->getInstance('133713371337133713371337', 16);
$z = $this->getInstance('BC98BC98BC98BC98BC98BC98', 16);
$this->assertSame($z->toHex(), $x->bitwise_XOR($y)->toHex());
}
public function testBitwiseNOT()
{
$x = $this->getInstance('EEEEEEEEEEEEEEEEEEEEEEE', 16);
$z = $this->getInstance('11111111111111111111111', 16);
$this->assertSame($z->toHex(), $x->bitwise_NOT()->toHex());
}
public function testBitwiseLeftShift()
{
$x = $this->getInstance('0x0000000FF0000000', 16);
$y = $this->getInstance('0x000FF00000000000', 16);
$this->assertSame($y->toHex(), $x->bitwise_LeftShift(16)->toHex());
}
public function testBitwiseRightShift()
{
$x = $this->getInstance('0x0000000FF0000000', 16);
$y = $this->getInstance('0x00000000000FF000', 16);
$z = $this->getInstance('0x000000000000000F', 16);
$n = $this->getInstance(0);
$this->assertSame($y->toHex(), $x->bitwise_RightShift(16)->toHex());
$this->assertSame($z->toHex(), $x->bitwise_RightShift(32)->toHex());
$this->assertSame($n->toHex(), $x->bitwise_RightShift(36)->toHex());
}
public function testSerializable()
{
$x = $this->getInstance('18446744073709551616');
$y = unserialize(serialize($x));
$this->assertTrue($x->equals($y));
$this->assertTrue($y->equals($x));
$this->assertSame('18446744073709551616', (string) $x);
$this->assertSame('18446744073709551616', (string) $y);
}
public function testClone()
{
$x = $this->getInstance('18446744073709551616');
$y = clone $x;
$this->assertTrue($x->equals($y));
$this->assertTrue($y->equals($x));
$this->assertSame('18446744073709551616', (string) $x);
$this->assertSame('18446744073709551616', (string) $y);
}
}