当我使用AES加密解密加密的用户名时,在解密的用户名末尾显示一堆“ \ 0 \ 0 \ 0”。有没有办法在加密时不添加这些?
加密和解密的示例代码:
string ky = xx_Convert.Base64ToString("RllhSzNjM09PZFAwT2RYMkdxOFI2cG9HYjVmWVIybnQ=");
string iv = xx_Convert.Base64ToString("Y2pZQmJsdVlqdlBYM0RtcXVleDJkNGNTa0FIYjhYQ2Y=");
string username = "test@mail.com";
string encriptedUsername = xx_Crypto.EncryptAES(ky, iv, username);
string encriptedPassword = xx_Crypto.EncryptAES(ky, iv, "password");
string decryptedUsername = xx_Crypto.DecryptAES(ky, iv, encriptedUsername);
string decryptedPassword = xx_Crypto.DecryptAES(ky, iv, encriptedPassword);
这在检查变量时为 decryptedUsername 提供了以下结果:“ test@mail.com \ 0 \ 0 \ 0 \ 0 \ 0 \ 0 \ 0 \ 0 \ 0 \ 0 \ 0 \ 0 \ 0 \ 0 \ 0 \ 0 \ 0 \ 0 \ 0“
这可能是加密功能的Padding属性的结果。
在“加密”功能中,“填充”设置为Padding = PaddingMode.Zeros
,但是当我删除此行时,它仍然填充结果,但带有其他不可见的字符。
加密功能:
public static string EncryptAES(string keyString, string ivString, string
text)
{
RijndaelManaged myRijndael = new RijndaelManaged()
{
Padding = PaddingMode.Zeros,
Mode = CipherMode.CBC,
KeySize = 256,
BlockSize = 256
};
byte[] key = Encoding.UTF8.GetBytes(keyString);
byte[] IV = Encoding.UTF8.GetBytes(ivString);
ICryptoTransform encryptor = myRijndael.CreateEncryptor(key, IV);
byte[] encrypted = null;
using (MemoryStream msEncrypt = new MemoryStream())
{
using (CryptoStream csEncrypt = new CryptoStream(msEncrypt, encryptor,
CryptoStreamMode.Write))
{
using (StreamWriter swEncrypt = new StreamWriter(csEncrypt))
{
//Write all data to the stream.
swEncrypt.Write(text);
}
encrypted = msEncrypt.ToArray();
}
}
return (Convert.ToBase64String(encrypted));
}
编辑:此处要求提供解密功能:
public static string DecryptAES(string keyString, string ivString, string text)
{
var myRijndael = new RijndaelManaged()
{
Padding = PaddingMode.Zeros,
Mode = CipherMode.CBC,
KeySize = 256,
BlockSize = 256
};
byte[] key = Encoding.UTF8.GetBytes(keyString);
byte[] IV = Encoding.UTF8.GetBytes(ivString);
ICryptoTransform decryptor = myRijndael.CreateDecryptor(key, IV);
byte[] sEncrypted = Convert.FromBase64String(text);
byte[] fromEncrypt = new byte[sEncrypted.Length];
MemoryStream msDecrypt = new MemoryStream(sEncrypted);
CryptoStream csDecrypt = new CryptoStream(msDecrypt, decryptor, CryptoStreamMode.Read);
csDecrypt.Read(fromEncrypt, 0, fromEncrypt.Length);
return (Encoding.UTF8.GetString(fromEncrypt));
}
那么可以在加密功能中防止这种情况吗?
PS::我没有使用与原始代码相同的键
答案 0 :(得分:0)
那么可以在加密功能中防止这种情况吗?
是的,只需使用:
<security>
您当前正在编码整个缓冲区。创建缓冲区时,将在填充期间删除填充字节,但将缓冲区中的字节预设为零。
请注意,零填充的用处不大,因为如果纯文本以一个或多个零字节结尾,则这些字节可能会被删除。因此,某些消息无法通过这种方式成功解密(密码学家想加密任意消息,而不仅仅是字符串)。