C# 如何在没有 IV 的情况下使用 AES 128 加密和解密？
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时间：2020-08-10 14:59:49 来源:igfitidea点击:
How can I encrypt and decrypt using AES 128 without an IV?
提问by kdh
I'm currently needing a way to encrypt a string and decrypt a byte array using AES-128 symmetrical encryption, in C#. I can't find a way how to do this, but maybe I've missed something.
我目前需要一种在 C# 中使用 AES-128 对称加密加密字符串和解密字节数组的方法。我找不到如何做到这一点的方法，但也许我错过了一些东西。
采纳答案by Arif Ansari
Import namespaces
导入命名空间
using System;
using System.IO;
using System.Text;
using System.Security.Cryptography;
static void Main(string[] args)
{
string value = "@arifansari300<3>";
string encryptedValue= EncryptDecrypt.Encrypt(value);
string decryptedValue = EncryptDecrypt.Decrypt(encryptedValue);
}
public static string Encrypt(string clearText)
{
string EncryptionKey = "MAKV2SPBNI99212";
byte[] clearBytes = Encoding.Unicode.GetBytes(clearText);
using (Aes encryptor = Aes.Create())
{
Rfc2898DeriveBytes pdb = new
Rfc2898DeriveBytes(EncryptionKey, new byte[]
{ 0x49, 0x76, 0x61, 0x6e, 0x20, 0x4d, 0x65, 0x64, 0x76, 0x65, 0x64, 0x65, 0x76 });
encryptor.Key = pdb.GetBytes(32);
encryptor.IV = pdb.GetBytes(16);
using (MemoryStream ms = new MemoryStream())
{
using (CryptoStream cs = new CryptoStream(ms, encryptor.CreateEncryptor(), CryptoStreamMode.Write))
{
cs.Write(clearBytes, 0, clearBytes.Length);
cs.Close();
}
clearText = Convert.ToBase64String(ms.ToArray());
}
}
return clearText;
}
public static string Decrypt(string cipherText)
{
string EncryptionKey = "MAKV2SPBNI99212";
byte[] cipherBytes = Convert.FromBase64String(cipherText);
using (Aes encryptor = Aes.Create())
{
Rfc2898DeriveBytes pdb = new
Rfc2898DeriveBytes(EncryptionKey, new byte[]
{ 0x49, 0x76, 0x61, 0x6e, 0x20, 0x4d, 0x65, 0x64, 0x76, 0x65, 0x64, 0x65, 0x76 });
encryptor.Key = pdb.GetBytes(32);
encryptor.IV = pdb.GetBytes(16);
using (MemoryStream ms = new MemoryStream())
{
using (CryptoStream cs = new CryptoStream(ms, encryptor.CreateDecryptor(), CryptoStreamMode.Write))
{
cs.Write(cipherBytes, 0, cipherBytes.Length);
cs.Close();
}
cipherText = Encoding.Unicode.GetString(ms.ToArray());
}
}
return cipherText;
}
