k-holy/gist:1050894

## gistfile1.phtml
<?php
namespace Phanda;

use Phanda;
class Util {

	public static function encrypt($source, $key, $iv, $toBase64Encode=true)
	{
		$mcrypt_resource = mcrypt_module_open(MCRYPT_BLOWFISH, '',  MCRYPT_MODE_CBC, '');
		$mcrypt_key_size = mcrypt_enc_get_key_size($mcrypt_resource);
		if (strlen($key) > $mcrypt_key_size) {
			throw new RuntimeException(
				sprintf('Key must be less than %d characters (bytes).', $mcrypt_key_size));
		}
		$mcrypt_iv_size = mcrypt_enc_get_iv_size($mcrypt_resource);
		if ($mcrypt_iv_size != 0 && strlen($iv) != $mcrypt_iv_size) {
			throw new RuntimeException(
				sprintf('IV must be %d characters (bytes).', $mcrypt_iv_size));
		}
		mcrypt_generic_init($mcrypt_resource, $key, $iv);
		$encrypted = mcrypt_generic($mcrypt_resource, $source);
		mcrypt_generic_deinit($mcrypt_resource);
		mcrypt_module_close($mcrypt_resource);
		return ($toBase64Encode) ? base64_encode($encrypted) : $encrypted;
	}

	public static function decrypt($encrypted, $key, $iv, $fromBase64Encoded=true)
	{
		if ($fromBase64Encoded) {
			$encrypted = base64_decode($encrypted);
		}
		$mcrypt_resource = mcrypt_module_open(MCRYPT_BLOWFISH, '',  MCRYPT_MODE_CBC, '');
		$mcrypt_key_size = mcrypt_enc_get_key_size($mcrypt_resource);
		if (strlen($key) > $mcrypt_key_size) {
			throw new RuntimeException(
				sprintf('Key must be less than %d characters (bytes).', $mcrypt_key_size));
		}
		$mcrypt_iv_size = mcrypt_enc_get_iv_size($mcrypt_resource);
		if ($mcrypt_iv_size != 0 && strlen($iv) != $mcrypt_iv_size) {
			throw new RuntimeException(
				sprintf('IV must be %d characters (bytes).', $mcrypt_iv_size));
		}
		mcrypt_generic_init($mcrypt_resource, $key, $iv);
		$decrypted = mdecrypt_generic($mcrypt_resource, $encrypted);
		mcrypt_generic_deinit($mcrypt_resource);
		mcrypt_module_close($mcrypt_resource);
		return ($fromBase64Encoded) ? rtrim($decrypted, "\0") : $decrypted;
	}

	public static function buildRandomString($length, $chars=null) {
		if (!isset($chars)) {
			$chars = 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789#$-+=?@[]_.';
		}
		$string = '';
		$max = strlen($chars) - 1;
		for ($i = 0; $i < $length; $i++) {
			$string .= $chars[mt_rand(0, $max)];
		}
		return $string;
	}

	public static function NL($data) {
		return str_replace("\r", "\n", str_replace("\r\n", "\n", $data));
	}

	public static function H($data, $default=null, $empty=null, $null=null) {
		$var = $default;
		if (isset($data)) {
			if (strcmp($data, '') != 0) {
				$var = htmlspecialchars(self::NL($data), ENT_QUOTES, 'UTF-8');
			} elseif (isset($empty)) {
				$var = $empty;
			}
		} elseif (isset($null)) {
			$var = $null;
		}
		return $var;
	}

}
use Phanda\Util as U;

$data['source'   ] = (isset($_POST['source']) && strlen($_POST['source']) >= 1) ? $_POST['source'] : null;
$data['encrypted'] = null;
$data['decrypted'] = null;

if (isset($_POST['exec'])) {
	$key = U::buildRandomString(56);
	$iv  = U::buildRandomString(8);
	$data['encrypted'] = U::encrypt($data['source'   ], $key, $iv, true);
	$data['decrypted'] = U::decrypt($data['encrypted'], $key, $iv, true);
}

?>
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
<title>Mcrypt暗号化(Blowfish, CBC)</title>
</head>
<body>

<form method="post" action="<?php print U::H($_SERVER['SCRIPT_NAME']) ?>">

<p>暗号化する文字列<input type="text" name="source" value="<?php print U::H($data['source']) ?>" /></p>
<p><input type="submit" name="exec" value="実行" /></p>
<p>暗号化結果：<?php print U::H($data['encrypted']) ?></p>
<p>復号結果：<?php print U::H($data['decrypted']) ?></p>

<hr />

</form>
</body>
</html>
	<?php
	namespace Phanda;

	use Phanda;
	class Util {

	public static function encrypt($source, $key, $iv, $toBase64Encode=true)
	{
	$mcrypt_resource = mcrypt_module_open(MCRYPT_BLOWFISH, '', MCRYPT_MODE_CBC, '');
	$mcrypt_key_size = mcrypt_enc_get_key_size($mcrypt_resource);
	if (strlen($key) > $mcrypt_key_size) {
	throw new RuntimeException(
	sprintf('Key must be less than %d characters (bytes).', $mcrypt_key_size));
	}
	$mcrypt_iv_size = mcrypt_enc_get_iv_size($mcrypt_resource);
	if ($mcrypt_iv_size != 0 && strlen($iv) != $mcrypt_iv_size) {
	throw new RuntimeException(
	sprintf('IV must be %d characters (bytes).', $mcrypt_iv_size));
	}
	mcrypt_generic_init($mcrypt_resource, $key, $iv);
	$encrypted = mcrypt_generic($mcrypt_resource, $source);
	mcrypt_generic_deinit($mcrypt_resource);
	mcrypt_module_close($mcrypt_resource);
	return ($toBase64Encode) ? base64_encode($encrypted) : $encrypted;
	}

	public static function decrypt($encrypted, $key, $iv, $fromBase64Encoded=true)
	{
	if ($fromBase64Encoded) {
	$encrypted = base64_decode($encrypted);
	}
	$mcrypt_resource = mcrypt_module_open(MCRYPT_BLOWFISH, '', MCRYPT_MODE_CBC, '');
	$mcrypt_key_size = mcrypt_enc_get_key_size($mcrypt_resource);
	if (strlen($key) > $mcrypt_key_size) {
	throw new RuntimeException(
	sprintf('Key must be less than %d characters (bytes).', $mcrypt_key_size));
	}
	$mcrypt_iv_size = mcrypt_enc_get_iv_size($mcrypt_resource);
	if ($mcrypt_iv_size != 0 && strlen($iv) != $mcrypt_iv_size) {
	throw new RuntimeException(
	sprintf('IV must be %d characters (bytes).', $mcrypt_iv_size));
	}
	mcrypt_generic_init($mcrypt_resource, $key, $iv);
	$decrypted = mdecrypt_generic($mcrypt_resource, $encrypted);
	mcrypt_generic_deinit($mcrypt_resource);
	mcrypt_module_close($mcrypt_resource);
	return ($fromBase64Encoded) ? rtrim($decrypted, "\0") : $decrypted;
	}

	public static function buildRandomString($length, $chars=null) {
	if (!isset($chars)) {
	$chars = 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789#$-+=?@[]_.';
	}
	$string = '';
	$max = strlen($chars) - 1;
	for ($i = 0; $i < $length; $i++) {
	$string .= $chars[mt_rand(0, $max)];
	}
	return $string;
	}

	public static function NL($data) {
	return str_replace("\r", "\n", str_replace("\r\n", "\n", $data));
	}

	public static function H($data, $default=null, $empty=null, $null=null) {
	$var = $default;
	if (isset($data)) {
	if (strcmp($data, '') != 0) {
	$var = htmlspecialchars(self::NL($data), ENT_QUOTES, 'UTF-8');
	} elseif (isset($empty)) {
	$var = $empty;
	}
	} elseif (isset($null)) {
	$var = $null;
	}
	return $var;
	}

	}
	use Phanda\Util as U;

	$data['source' ] = (isset($_POST['source']) && strlen($_POST['source']) >= 1) ? $_POST['source'] : null;
	$data['encrypted'] = null;
	$data['decrypted'] = null;

	if (isset($_POST['exec'])) {
	$key = U::buildRandomString(56);
	$iv = U::buildRandomString(8);
	$data['encrypted'] = U::encrypt($data['source' ], $key, $iv, true);
	$data['decrypted'] = U::decrypt($data['encrypted'], $key, $iv, true);
	}

	?>
	<!DOCTYPE html>
	<html>
	<head>
	<meta charset="utf-8" />
	<title>Mcrypt暗号化(Blowfish, CBC)</title>
	</head>
	<body>

	<form method="post" action="<?php print U::H($_SERVER['SCRIPT_NAME']) ?>">

	<p>暗号化する文字列<input type="text" name="source" value="<?php print U::H($data['source']) ?>" /></p>
	<p><input type="submit" name="exec" value="実行" /></p>
	<p>暗号化結果：<?php print U::H($data['encrypted']) ?></p>
	<p>復号結果：<?php print U::H($data['decrypted']) ?></p>

	<hr />

	</form>
	</body>
	</html>