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<?php
/**
* Tests for the CryptUtil functions.
*
* PHP versions 4 and 5
*
* LICENSE: See the COPYING file included in this distribution.
*
* @package OpenID
* @author JanRain, Inc. <openid@janrain.com>
* @copyright 2005 Janrain, Inc.
* @license http://www.gnu.org/copyleft/lesser.html LGPL
*/
require_once('PHPUnit.php');
require_once('Net/OpenID/CryptUtil.php');
class Tests_Net_OpenID_CryptUtil extends PHPUnit_TestCase {
function test_length()
{
$cases = array(1, 10, 255);
foreach ($cases as $length) {
$data = Net_OpenID_CryptUtil::getBytes($length);
$this->assertEquals(strlen($data), $length);
}
}
function test_different()
{
$num_iterations = 100;
$data_length = 20;
$data = Net_OpenID_CryptUtil::getBytes($num_iterations);
for ($i = 0; $i < $num_iterations; $i++) {
$last = $data;
$data = Net_OpenID_CryptUtil::getBytes($num_iterations);
$this->assertFalse($data == $last);
}
}
function test_cryptrand()
{
$lib =& Net_OpenID_MathLibrary::getLibWrapper();
// It's possible, but HIGHLY unlikely that a correct
// implementation will fail by returning the same number twice
$s = Net_OpenID_CryptUtil::getBytes(32);
$t = Net_OpenID_CryptUtil::getBytes(32);
$this->assertEquals(strlen($s), 32);
$this->assertEquals(strlen($t), 32);
$this->assertFalse($s == $t);
$a = Net_OpenID_CryptUtil::randrange($lib->pow(2, 128));
$b = Net_OpenID_CryptUtil::randrange($lib->pow(2, 128));
// If $a is a float, it's because we're using fallback number
// storage (PHP stores overflowed ints as floats).
$this->assertFalse($lib->cmp($b, $a) == 0, "Same: $a $b");
$n = $lib->init(Net_OpenID_CryptUtil::maxint());
$one = $lib->init(1);
$n = $lib->add($n, 1);
// Make sure that we can generate random numbers that are
// larger than platform int size
$result = Net_OpenID_CryptUtil::randrange($n);
// What can we say about the result?
}
function test_strxor()
{
$NUL = "\x00";
$cases = array(
array($NUL, $NUL, $NUL),
array("\x01", $NUL, "\x01"),
array("a", "a", $NUL),
array("a", $NUL, "a"),
array("abc", str_repeat($NUL, 3), "abc"),
array(str_repeat("x", 10),
str_repeat($NUL, 10),
str_repeat("x", 10)),
array("\x01", "\x02", "\x03"),
array("\xf0", "\x0f", "\xff"),
array("\xff", "\x0f", "\xf0"),
);
while (list($index, $values) = each($cases)) {
list($aa, $bb, $expected) = $values;
$actual = Net_OpenID_CryptUtil::strxor($aa, $bb);
$this->assertEquals($actual, $expected);
}
$exc_cases = array(
array('', 'a'),
array('foo', 'ba'),
array(str_repeat($NUL, 3),
str_repeat($NUL, 4)),
array(implode('', array_map('chr',
range(0, 255))),
implode('', array_map('chr',
range(0, 127))))
);
while(list($index, $values) = each($exc_cases)) {
list($aa, $bb) = $values;
$unexpected = Net_OpenID_CryptUtil::strxor($aa, $bb);
$this->assertNull($unexpected);
}
}
function test_reversed()
{
$cases = array(
array('', ''),
array('a', 'a'),
array('ab', 'ba'),
array('abc', 'cba'),
array('abcdefg', 'gfedcba'),
array(array(), array()),
array(array(1), array(1)),
array(array(1,2), array(2,1)),
array(array(1,2,3), array(3,2,1)),
array(range(0, 999), array_reverse(range(0, 999)))
);
while (list($index, $values) = each($cases)) {
list($case, $expected) = $values;
$actual = Net_OpenID_CryptUtil::reversed($case);
$this->assertEquals($actual, $expected);
$twice = Net_OpenID_CryptUtil::reversed($actual);
$this->assertEquals($twice, $case);
}
}
function test_binaryLongConvert()
{
$lib =& Net_OpenID_MathLibrary::getLibWrapper();
$MAX = Net_OpenID_CryptUtil::maxint();
foreach (range(0, 499) as $iteration) {
$n = $lib->init(0);
foreach (range(0, 9) as $i) {
$rnd = Net_OpenID_CryptUtil::randrange($MAX);
$n = $lib->add($n, $rnd);
}
$s = Net_OpenID_CryptUtil::longToBinary($n);
$this->assertTrue(is_string($s));
$n_prime = Net_OpenID_CryptUtil::binaryToLong($s);
$this->assertEquals($lib->cmp($n, $n_prime), 0);
}
$cases = array(
array("\x00", 0),
array("\x01", 1),
array("\x00\xFF", 255),
array("\x00\x80", 128),
array("\x00\x81", 129),
array("\x00\x80\x00", 32768),
array("OpenID is cool",
"1611215304203901150134421257416556")
);
foreach ($cases as $case) {
list($s, $n) = $case;
$n_prime = Net_OpenID_CryptUtil::binaryToLong($s);
$s_prime = Net_OpenID_CryptUtil::longToBinary($n);
$this->assertEquals($lib->cmp($n, $n_prime), 0);
$this->assertTrue($s == $s_prime);
}
}
function _parseBase64Data()
{
$lib =& Net_OpenID_MathLibrary::getLibWrapper();
$lines = file_get_contents('Tests/n2b64', true);
$this->assertTrue(is_string($lines));
$lines = explode("\n", $lines);
$data = array();
foreach ($lines as $line) {
if (!$line) {
continue;
}
list($b64, $ascii) = explode(' ', $line);
$num = @$lib->init($ascii);
if ($num === false) {
$this->assertEquals($lib->type, 'dumb');
} else {
$data[$b64] = $num;
}
}
return $data;
}
function test_longToBase64()
{
$data = $this->_parseBase64Data();
foreach ($data as $expected => $num) {
$actual = Net_OpenID_CryptUtil::longToBase64($num);
$this->assertEquals($expected, $actual);
}
}
function test_base64ToLong()
{
$lib =& Net_OpenID_MathLibrary::getLibWrapper();
$data = $this->_parseBase64Data();
foreach ($data as $b64 => $expected) {
$actual = Net_OpenID_CryptUtil::base64ToLong($b64);
$this->assertTrue($lib->cmp($expected, $actual) == 0);
}
}
}
?>
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