C#实现 AES算法加密
理论知识链接 ：https://www.cnblogs.com/luop/p/4334160.html
先上效果图：文件和加密文件之间的转换。
先添加辅助类
public class AES_EnorDecrypt
{
//定义默认密钥
private static byte[] _aesKeyByte = { 0x12, 0x34, 0x56, 0x78, 0x90, 0xAB, 0xCD, 0xEF, 0x12, 0x34, 0x56, 0x78, 0x90, 0xAB, 0xCD, 0xEF };
private static string _aesKeyStr = Encoding.UTF8.GetString(_aesKeyByte);
/// 密文
public static string AESEncrypt(string Data, string Key, string Vector)
{
byte[] plainBytes = Encoding.UTF8.GetBytes(Data);
byte[] bKey = new byte[32];
Array.Copy(Encoding.UTF8.GetBytes(Key.PadRight(bKey.Length)), bKey, bKey.Length);
byte[] bVector = new byte[16];
Array.Copy(Encoding.UTF8.GetBytes(Vector.PadRight(bVector.Length)), bVector, bVector.Length);
byte[] Cryptograph = null;//加密后的密文
Rijndael Aes = Rijndael.Create();
try
{
using (MemoryStream Memory = new MemoryStream())
{
//把内存流对象包装成加密流对象
using (CryptoStream Encryptor = new CryptoStream(Memory, Aes.CreateEncryptor(bKey, bVector), CryptoStreamMode.Write))
{
Encryptor.Write(plainBytes, 0, plainBytes.Length);
Encryptor.FlushFinalBlock();
Cryptograph = Memory.ToArray();
}
}
}
catch
{
Cryptograph = null;
}
return Convert.ToBase64String(Cryptograph);
}
/// 密文
public static byte[] AESEncrypt(byte[] Data, string Key, string Vector)
{
byte[] bKey = new byte[32];
Array.Copy(Encoding.UTF8.GetBytes(Key.PadRight(bKey.Length)), bKey, bKey.Length);
byte[] bVector = new byte[16];
Array.Copy(Encoding.UTF8.GetBytes(Vector.PadRight(bVector.Length)), bVector, bVector.Length);
byte[] Cryptograph = null;//加密后的密文
Rijndael Aes = Rijndael.Create();
try
{
using (MemoryStream Memory = new MemoryStream())
{
//把内存流对象包装成加密流对象
using (CryptoStream Encryptor = new CryptoStream(Memory, Aes.CreateEncryptor(bKey, bVector), CryptoStreamMode.Write))
{
Encryptor.Write(Data, 0, Data.Length);
Encryptor.FlushFinalBlock();
Cryptograph = Memory.ToArray();
}
}
}
catch
{
Cryptograph = null;
}
return Cryptograph;
}
/// 明文
public static string AESDecrypt(string Data, string Key, string Vector)
{
byte[] encryptedBytes = Convert.FromBase64String(Data);
byte[] bKey = new byte[32];
Array.Copy(Encoding.UTF8.GetBytes(Key.PadRight(bKey.Length)), bKey, bKey.Length);
byte[] bVector = new byte[16];
Array.Copy(Encoding.UTF8.GetBytes(Vector.PadRight(bVector.Length)), bVector, bVector.Length);
byte[] original = null;//解密后的明文
Rijndael Aes = Rijndael.Create();
try
{
using (MemoryStream Memory = new MemoryStream(encryptedBytes))
{
//把内存流对象包装成加密对象
using (CryptoStream Decryptor = new CryptoStream(Memory, Aes.CreateDecryptor(bKey, bVector), CryptoStreamMode.Read))
{
//明文存储区
using (MemoryStream originalMemory = new MemoryStream())
{
byte[] Buffer = new byte[1024];
int readBytes = 0;
while ((readBytes = Decryptor.Read(Buffer, 0, Buffer.Length)) > 0)
{
originalMemory.Write(Buffer, 0, readBytes);
}
original = originalMemory.ToArray();
}
}
}
}
catch
{
original = null;
}
return Encoding.UTF8.GetString(original);
}
/// 明文
public static byte[] AESDecrypt(byte[] Data, string Key, string Vector)
{
byte[] bKey = new byte[32];
Array.Copy(Encoding.UTF8.GetBytes(Key.PadRight(bKey.Length)), bKey, bKey.Length);
byte[] bVector = new byte[16];
Array.Copy(Encoding.UTF8.GetBytes(Vector.PadRight(bVector.Length)), bVector, bVector.Length);
byte[] original = null;//解密后的明文
Rijndael Aes = Rijndael.Create();
try
{
using (MemoryStream Memory = new MemoryStream(Data))
{
//把内存流对象包装成加密对象
using (CryptoStream Decryptor = new CryptoStream(Memory, Aes.CreateDecryptor(bKey, bVector), CryptoStreamMode.Read))
{
//明文存储区
using (MemoryStream originalMemory = new MemoryStream())
{
byte[] Buffer = new byte[1024];
int readBytes = 0;
while ((readBytes = Decryptor.Read(Buffer, 0, Buffer.Length)) > 0)
{
originalMemory.Write(Buffer, 0, readBytes);
}
original = originalMemory.ToArray();
}
}
}
}
catch
{
original = null;
}
return original;
}
}
AES是块加密，块的长度是16字节，如果原文不到16的字节，就会进行填充至16个字节。
开始实现
界面布局
textbox1为文件位置，textbox2为密码。
设置好后
public partial class FormAes : Form
{
#region 属性
private static string _aesKeyVector = "q2T_=R/*33vc";
#endregion
public FormAes()
{
InitializeComponent();
}
///