RSA加密，js前端，php后端

    <script src="http://libs.baidu.com/jquery/1.9.0/jquery.js"></script>
    <script src="./Barrett.js"></script>
    <script src="./BigInt.js"></script>
    <script src="./RSA.js"></script>
    <script>
        $(function(){
            var rsa_n = "AA6349CF6ADECA06C7A9CAADB43D47BE3D53BB93B843DF7FE8265F6D32C6A0F1CF3F3536E9C21D74117907FE00ED23C2B52140BA5D030FCE76F25040978BAF842E022C99C6A27FE63B2FD3DAAE2C7FBDF0BC0CEB3DBACAD405ACC9E692E13D60421B63624149E5BE4F95D1A701190135053EDCA316C836D1760639854BC421EF";  
                  
            $("#submit").click(function(){  
                setMaxDigits(131);
                var key = new RSAKeyPair("10001", ‘‘, rsa_n);
                var password = $("#password").val();  
                password = encryptedString(key, password);
                $("#password").val(password);
                $("#login").submit();
            });
        });
    </script>

/**
 * 公钥加密
 *
 * @param string 明文
 * @param string 证书文件（.crt）
 * @return string 密文（base64编码）
 */
function publickey_encodeing($sourcestr, $fileName) {
    $key_content = file_get_contents($fileName);
    $pubkeyid = openssl_get_publickey($key_content);
    if (openssl_public_encrypt($sourcestr, $crypttext, $pubkeyid)) {
        return base64_encode("".$crypttext);
    }
}
/**
 * 私钥解密
 *
 * @param string 密文（二进制格式且base64编码）
 * @param string 密钥文件（.pem / .key）
 * @param string 密文是否来源于JS的RSA加密
 * @return string 明文
 */
function privatekey_decodeing($crypttext, $fileName, $fromjs = FALSE) {
    $key_content = file_get_contents($fileName);
    $prikeyid = openssl_get_privatekey($key_content);
    $crypttext = base64_decode($crypttext);
    $padding = $fromjs ? OPENSSL_NO_PADDING : OPENSSL_PKCS1_PADDING;
    if (openssl_private_decrypt($crypttext, $sourcestr, $prikeyid, $padding)) {
        return $fromjs ? rtrim(strrev($sourcestr), "/0") : "".$sourcestr;
    }
    return ;
}

// 以上是加密和解密函数，以下是解密过程
$txt_en = base64_encode(pack("H*", $_POST[‘password‘]));  
$file = ‘./ssl/rsa_private_key.pem‘;  
$txt_de = privatekey_decodeing($txt_en, $file, TRUE);
echo ‘解密：‘. $txt_de;