Question

我使用此类执行AES加密/解密：

class Aes
{
    static byte[] Key = { 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f, 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, 0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f };
    static byte[] IV = { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };

    public static byte[] Encrypt(string plainText)
    {
        byte[] encrypted;
        // Create a new AesManaged.    
        using (AesManaged aes = new AesManaged())
        {
            aes.Padding = PaddingMode.None;
            aes.Mode = CipherMode.ECB;

            // Create encryptor    
            ICryptoTransform encryptor = aes.CreateEncryptor(Key, IV);
            // Create MemoryStream    
            using (MemoryStream ms = new MemoryStream())
            {
                // Create crypto stream using the CryptoStream class. This class is the key to encryption    
                // and encrypts and decrypts data from any given stream. In this case, we will pass a memory stream    
                // to encrypt    
                using (CryptoStream cs = new CryptoStream(ms, encryptor, CryptoStreamMode.Write))
                {
                    // Create StreamWriter and write data to a stream    
                    using (StreamWriter sw = new StreamWriter(cs))
                        sw.Write(plainText);
                    encrypted = ms.ToArray();
                }
            }
        }
        // Return encrypted data    
        return encrypted;
    }

    public static string Decrypt(byte[] cipherText/*, byte[] Key=Key, byte[] IV=IV*/)
    {
        string plaintext = null;
        // Create AesManaged    
        using (AesManaged aes = new AesManaged())
        {
            aes.Padding = PaddingMode.None;
            aes.Mode = CipherMode.ECB;

            // Create a decryptor    
            ICryptoTransform decryptor = aes.CreateDecryptor(Key, IV);
            // Create the streams used for decryption.    
            using (MemoryStream ms = new MemoryStream(cipherText))
            {
                // Create crypto stream    
                using (CryptoStream cs = new CryptoStream(ms, decryptor, CryptoStreamMode.Read))
                {
                    // Read crypto stream    
                    using (StreamReader reader = new StreamReader(cs))
                        plaintext = reader.ReadToEnd();
                }
            }
        }
        return plaintext;
    }
}

问题是，当我使用以下代码加密时，出现错误： System.Security.Cryptography.CryptographicException：'要加密的数据长度无效。'

var x = Aes.Encrypt(System.Text.Encoding.Default.GetString(new byte[] { 0x00, 0x11, 0x22, 0x33, 0x44, 0x55, 0x66, 0x77, 0x88, 0x99, 0xaa, 0xbb, 0xcc, 0xdd, 0xee, 0xff }));
Console.WriteLine(string.Join(", ", x.Select(b => b.ToString("X2"))));

我正在尝试与MSP432微控制器实现加密通信。根据此example，使用以下值：

Key: 000102030405060708090a0b0c0d0e0f101112131415161718191a1b1c1d1e1f
Plaintext: 00112233445566778899aabbccddeeff

我应该得到：

Ciphertext: 8ea2b7ca516745bfeafc49904b496089

有人可以告诉我我在做什么错吗？

为什么要加密的数据长度无效？

0 个答案: