将加密解密函数从 PHP 转换为 NodeJS

因为根据您的 comments ，实现应该只解密用encrypt()方法产生的密文，并且encrypt()方法应用默认的PKCS#7填充，默认的PKCS#7填充也可以用于解密，即不再需要定制的解填充strippadding().一种可能的NodeJS实现是:

var crypto = require('crypto');

const encrypt = (data, key, iv) => {
    const cipher = crypto.createCipheriv('AES-256-CBC', key, iv);
    let encrypted = cipher.update(data, 'utf8', 'base64');
    encrypted += cipher.final('base64');
    return encrypted;
}

const decrypt = (encryptedString, key, iv) => {
    try {
        const decipher = crypto.createDecipheriv('AES-256-CBC', key, iv);
        let decrypted = decipher.update(encryptedString, 'base64', 'utf-8');
        decrypted += decipher.final('utf-8');
        return decrypted
    } catch (e) {
        console.log(`Failed to decrypt string. Error: ${e.message}`);
        return encryptedString;
    }
}

iv = '0123456789012345';
key = '01234567890123456789012345678901';
plaintext = 'The quick brown fox jumps over the lazy dog';
ciphertext = encrypt(plaintext, key, iv);
console.log(ciphertext); // 4G9jpxHot6qflEAQfUaAoReZQ4DqMdKimblTAtQ5uXAsjmWpkjbskgcEkVzxqYpE
decrypted = decrypt(ciphertext, key, iv);
console.log(decrypted); // The quick brown fox jumps over the lazy dog

测试:以下PHP代码使用POST方法enrypt()和定制的decrypt():

class Test {
    private $iv = '0123456789012345';
    private $cipher_key = '01234567890123456789012345678901';
    public function encrypt($data)
    {
        return base64_encode(openssl_encrypt($data, 'AES-256-CBC', $this->cipher_key, OPENSSL_RAW_DATA, $this->iv));
    }
    public function decrypt($data)
    {
        try
        {
            return openssl_decrypt(base64_decode($data), 'AES-256-CBC', $this->cipher_key, OPENSSL_RAW_DATA, $this->iv);
        }
        catch (\Exception $e)
        {
            Logger::log("Failed to decrypt string. Error: " . $e->getMessage());
            return $encryptedString;
        }
    }
}

$test = new Test();
$plaintext = 'The quick brown fox jumps over the lazy dog';
$ciphertext = $test->encrypt($plaintext);
print($ciphertext . PHP_EOL); // 4G9jpxHot6qflEAQfUaAoReZQ4DqMdKimblTAtQ5uXAsjmWpkjbskgcEkVzxqYpE
$decrypted = $test->decrypt($ciphertext);
print($decrypted . PHP_EOL); // The quick brown fox jumps over the lazy dog

对于相同的密钥和明文，密文与NodeJS代码相同，类似于解密的文本.