PHP   发布时间:2022-04-09  发布网站:大佬教程  code.js-code.com
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今天写了一个PHP的AES加密类。适用于Yii的扩展。 如果不用在Yii框架中,把代码中Yii::app()->params['encryptKey'] 换成你对应的认key就可以了。 类代码:

PHP;">
params['encryptKey'] : $key,mcrypt_enc_get_key_size($module));
        /* Create the IV and determine the keysize length,use MCRYPT_RAND
         * on Windows instead */
        $iv = substr(md5($key),mcrypt_enc_get_iv_size($modulE));
        /* Intialize encryption */
        mcrypt_generic_init($module,$key,$iv);
@H_696_4@    /* Encrypt data */
    $encrypted = mcrypt_generic($module,$plaintext);

    /* Terminate encryption handler */
    mcrypt_generic_deinit($modulE);
    mcrypt_module_close($modulE);
    return base64_encode($encrypted);
}

/**
 * This was AES-128 / CBC / NoPadding decrypted.
 * @author Terry
 * @param String $encrypted     base64_encode encrypted String
 * @param String $key
 * @throws CException
 * @return String
 */
public static function AesDecrypt($encrypted,$key = null)
{
    if ($encrypted == '') return '';
    if(!extension_loaded('mcrypt'))
        throw new CException(Yii::t('yii','AesDecrypt requires <a href="http://code.js-code.com/tag/php/" target="_blank" class="keywords">php</a> mcrypt extension to be loaded in order to use data encryption feature.'));

    $ciphertext_dec = base64_decode($encrypted);
    $module = mcrypt_module_open(MCRYPT_RIJNDAEL_128,mcrypt_enc_get_key_size($modulE));

    $iv = substr(md5($key),mcrypt_enc_get_iv_size($modulE));

    /* Initialize encryption module for decryption */
    mcrypt_generic_init($module,$iv);

    /* Decrypt encrypted String */
    $decrypted = mdecrypt_generic($module,$ciphertext_dec);

    /* Terminate decryption handle and close module */
    mcrypt_generic_deinit($modulE);
    mcrypt_module_close($modulE);
    return rtrim($decrypted,"\0");
}

/**
 * Returns the length of the given String.
 * If available uses the multibyte String function mb_strlen.
 * @param String $String the String being measured for length
 * @return Integer the length of the String
 */
private static function strlen($String)
{
    return extension_loaded('mbString') ? mb_strlen($String,'8bit') : strlen($String);
}

/**
 * Returns the portion of String specified by the start and length parameters.
 * If available uses the multibyte String function mb_substr
 * @param String $String the input String. Must be one character or longer.
 * @param Integer <a href="http://code.js-code.com/tag/start/" target="_blank" class="keywords">$start</a> the starTing position
 * @param Integer $length the desired portion length
 * @return String the extracted part of String,or falSE on failure or an empty String.
 */
private static function substr($String,<a href="http://code.js-code.com/tag/start/" target="_blank" class="keywords">$start</a>,$length)
{
    return extension_loaded('mbString') ? mb_substr($String,$length,'8bit') : substr($String,$length);
}

}

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