C# AES-128-GCM标记不匹配
我正在尝试用aes-128-gcm加密和解密。 但当我运行测试时,我有一个错误: System.Security.Cryptography.CryptographyException:计算的身份验证标记与输入身份验证标记不匹配 我不明白为什么会出现这个错误,因为当我用encrypt方法打印标签和用decrypt方法打印标签时,它们是一样的?我读到相关数据可能会改变一些东西,但我没有发现什么 这是测试C# AES-128-GCM标记不匹配,c#,aes-gcm,C#,Aes Gcm,我正在尝试用aes-128-gcm加密和解密。 但当我运行测试时,我有一个错误: System.Security.Cryptography.CryptographyException:计算的身份验证标记与输入身份验证标记不匹配 我不明白为什么会出现这个错误,因为当我用encrypt方法打印标签和用decrypt方法打印标签时,它们是一样的?我读到相关数据可能会改变一些东西,但我没有发现什么 这是测试 [TestCase("ABC", "ABC")] public void TestEncrypD
[TestCase("ABC", "ABC")]
public void TestEncrypDecrypt(string message, string expected)
{
string cle = "FnUoIZvBUzC1Q/rn5WMi7Q==";
var aes = new AESEncryption(cle);
var crypted = aes.Encrypt(message);
Assert.That(aes.Decrypt(crypted), Is.EqualTo(expected));
}
这是我的班级:
public class AESEncryption : IEncryption
{
private byte[] KEY { get; set; }
private byte[] TAG { get; set; }
public AESEncryption(string key)
{
KEY = Convert.FromBase64String(key);
TAG = new byte[16];
}
public string Encrypt(string message)
{
byte[] plainText = Encoding.UTF8.GetBytes(message);
byte[] ciphertext = new byte[plainText.Length];
using (AesGcm aesGcm = new AesGcm(KEY))
{
aesGcm.Encrypt(
new byte[]{ 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0A, 0x0B },
plainText,
ciphertext,
TAG);
}
return Convert.ToBase64String(ciphertext);
}
public string Decrypt(string message)
{
byte[] cipherText = Encoding.UTF8.GetBytes(message);
byte[] plainText = new byte[cipherText.Length];
using (AesGcm aesGcm = new AesGcm(KEY))
{
aesGcm.Decrypt(new byte[] { 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0A, 0x0B },
cipherText,
TAG,
plainText);
Console.WriteLine("d1 " + Convert.ToBase64String(TAG));
}
return Convert.ToBase64String(plainText);
}
}
非常感谢 您刚刚错过了
tobase64字符串
和编码。GetBytes
顺序:
public class AESEncryption
{
private byte[] KEY { get; set; }
private byte[] TAG { get; set; }
private byte[] NONCE { get; set; }
public AESEncryption(string key)
{
KEY = Convert.FromBase64String(key);
TAG = new byte[16];
NONCE = new byte[12] { 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0A, 0x0B };
}
public string Encrypt(string message)
{
byte[] plainText = Encoding.UTF8.GetBytes(message);
byte[] ciphertext = new byte[plainText.Length];
using (AesGcm aesGcm = new AesGcm(KEY))
{
aesGcm.Encrypt(
NONCE,
plainText,
ciphertext,
TAG);
}
Debug.WriteLine("e " + Convert.ToBase64String(TAG));
return Convert.ToBase64String(ciphertext);
}
public string Decrypt(string message)
{
Debug.WriteLine("d " + Convert.ToBase64String(TAG));
// Notice here -> First get byte from the encoded base64.
byte[] cipherText = Convert.FromBase64String(message);
byte[] plainText = new byte[cipherText.Length];
using (AesGcm aesGcm = new AesGcm(KEY))
{
aesGcm.Decrypt(
NONCE,
cipherText,
TAG,
plainText);
}
// Notice here -> then get back the string from plain text.
return Encoding.UTF8.GetString(plainText);
}
}
那么
string cle = "FnUoIZvBUzC1Q/rn5WMi7Q==";
var aes = new AESEncryption(cle);
var crypted = aes.Encrypt("Hello");
Debug.WriteLine($"DECRYPT TEST: {aes.Decrypt(crypted)}");
// Prints "Hello"