Question

目前正在使用

$key="pass";
$val="secret";
$encp=mcrypt_encrypt(MCRYPT_DES, $key, $val, MCRYPT_MODE_ECB);

但是当我打电话给printf($encp)时使用PHP 5.2.7版

显示没有值

有没有更好的方法呢。请帮助。

编辑：

<?PHP

    define('SECURE_KEY','Somekey');

    function encrypt($value){
        $iv_size = mcrypt_get_iv_size(MCRYPT_RIJNDAEL_256, MCRYPT_MODE_ECB);
        $iv = mcrypt_create_iv($iv_size, MCRYPT_RAND);
        return mcrypt_encrypt(MCRYPT_RIJNDAEL_256, SECURE_KEY, $value, MCRYPT_MODE_ECB, $iv);
    }

    function decrypt($value){
        $iv_size = mcrypt_get_iv_size(MCRYPT_RIJNDAEL_256, MCRYPT_MODE_ECB);
        $iv = mcrypt_create_iv($iv_size, MCRYPT_RAND);
        return trim(mcrypt_decrypt(MCRYPT_RIJNDAEL_256, SECURE_KEY, $value, MCRYPT_MODE_ECB, $iv));
    }
    $temp=encrypt("teststring");
    printf($temp);
    ?>

Answer 1

更新（27/09/17）：

由于mcrypt_encrypt从 PHP 7.1.0 开始已弃用。我使用openssl添加了一个简单的加密/解密。

function encrypt($string, $key = 'PrivateKey', $secret = 'SecretKey', $method = 'AES-256-CBC') {
    // hash
    $key = hash('sha256', $key);
    // create iv - encrypt method AES-256-CBC expects 16 bytes
    $iv = substr(hash('sha256', $secret), 0, 16);
    // encrypt
    $output = openssl_encrypt($string, $method, $key, 0, $iv);
    // encode
    return base64_encode($output);
}

function decrypt($string, $key = 'PrivateKey', $secret = 'SecretKey', $method = 'AES-256-CBC') {
    // hash
    $key = hash('sha256', $key);
    // create iv - encrypt method AES-256-CBC expects 16 bytes
    $iv = substr(hash('sha256', $secret), 0, 16);
    // decode
    $string = base64_decode($string);
    // decrypt
    return openssl_decrypt($string, $method, $key, 0, $iv);
}

$str = 'Encrypt this text';
echo "Plain: " .$str. "\n";

// encrypt
$encrypted_str = encrypt($str);
echo "Encrypted: " .$encrypted_str. "\n";

// decrypt
$decrypted_str = decrypt($encrypted_str);
echo "Decrypted: " .$decrypted_str. "\n";

试试这些：（PHP <7.1.0）如果您使用＆gt; PHP 7.1.0见上文。

define('SECURE_KEY','Somekey');//Assigned within a config, pref outside of root dir

function encrypt($value){
    $iv_size = mcrypt_get_iv_size(MCRYPT_RIJNDAEL_256, MCRYPT_MODE_ECB);
    $iv = mcrypt_create_iv($iv_size, MCRYPT_RAND);
    return mcrypt_encrypt(MCRYPT_RIJNDAEL_256, SECURE_KEY, $value, MCRYPT_MODE_ECB, $iv);
}

function decrypt($value){
    $iv_size = mcrypt_get_iv_size(MCRYPT_RIJNDAEL_256, MCRYPT_MODE_ECB);
    $iv = mcrypt_create_iv($iv_size, MCRYPT_RAND);
    return trim(mcrypt_decrypt(MCRYPT_RIJNDAEL_256, SECURE_KEY, $value, MCRYPT_MODE_ECB, $iv));
}
//Simple usage
$encryptedString = encrypt('This String Will Be encrypted');
echo decrypt($encryptedString);

从来源编辑 - http://php.net/manual/en/function.mcrypt-encrypt.php

Answer 2

尝试使用这些PHP函数convert_uuencode和convert_uudecode：

function encrypt_decrypt ($data, $encrypt) {
    if ($encrypt == true) {
        $output = base64_encode (convert_uuencode ($data));
    } else {
        $output = convert_uudecode (base64_decode ($data));
    }
    return $output;
}

$enc_txt = encrypt_decrypt ("PASSWORD TEXT", true);
echo $enc_txt."\n";
// LTQkJTM0VT0vNEQwQDUkNTg1YGBgCmAK
echo encrypt_decrypt ($enc_txt, false);
// PASSWORD TEXT

这更简单，不依赖于PHP中安装的库

在PHP中加密字符串

2 个答案:

更新（27/09/17）：