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ES（The Advanced Encryption Standard）是美国国家标准与技术研究所用于加密电子数据的规范。它被预期能成为人们公认的加密包括金融、电信和政府数字信息的方法。
本文实例为大家介绍C#实现对AES加密解密的详细代码，分享给大家供大家参考，具体内容如下
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Security.Cryptography;
using System.IO;
namespace AESDemo
{
public static class AESHelper
{
/// <summary>
/// AES加密
/// </summary>
/// <param name="Data">被加密的明文</param>
/// <param name="Key">密钥</param>
/// <param name="Vector">向量</param>
/// <returns>密文</returns>
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
{
// 开辟一块内存流
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))
{
// 明文数据写入加密流
Encryptor.Write(Data, 0, Data.Length);
Encryptor.FlushFinalBlock();
Cryptograph = Memory.ToArray();
}
}
}
catch
{
Cryptograph = null;
}
return Cryptograph;
}
/// <summary>
/// AES解密
/// </summary>
/// <param name="Data">被解密的密文</param>
/// <param name="Key">密钥</param>
/// <param name="Vector">向量</param>
/// <returns>明文</returns>
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
{
// 开辟一块内存流，存储密文
using (MemoryStream Memory = new MemoryStream(Data))
{
// 把内存流对象包装成加密流对象
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];
Int32 readBytes = 0;
while ((readBytes = Decryptor.Read(Buffer, 0, Buffer.Length)) > 0)
{
originalMemory.Write(Buffer, 0, readBytes);
}
original = originalMemory.ToArray();
}
}
}
}
catch
{
original = null;
}
return original;
}
}
}
不使用向量的方式：
public static class AESCrypto
{
/// <summary>
/// IV向量为固定值
/// </summary>
//private static byte[] _iV = {
// 85, 60, 12, 116,
// 99, 189, 173, 19,
// 138, 183, 232, 248,
// 82, 232, 200, 242
//};
public static byte[] Decrypt(byte[] encryptedBytes, byte[] key)
{
MemoryStream mStream = new MemoryStream( encryptedBytes );
//mStream.Write( encryptedBytes, 0, encryptedBytes.Length );
//mStream.Seek( 0, SeekOrigin.Begin );
RijndaelManaged aes = new RijndaelManaged( );
aes.Mode = CipherMode.ECB;
aes.Padding = PaddingMode.PKCS7;
aes.KeySize = 128;
aes.Key = key;
//aes.IV = _iV;
CryptoStream cryptoStream = new CryptoStream( mStream, aes.CreateDecryptor( ), CryptoStreamMode.Read );
try {
byte[] tmp = new byte[ encryptedBytes.Length + 32 ];
int len = cryptoStream.Read( tmp, 0, encryptedBytes.Length + 32 );
byte[] ret = new byte[ len ];
Array.Copy( tmp, 0, ret, 0, len );
return ret;
}
finally {
cryptoStream.Close( );
mStream.Close( );
aes.Clear( );
}
}
public static byte[] Encrypt(byte[] plainBytes, byte[] key)
{
MemoryStream mStream = new MemoryStream();
RijndaelManaged aes = new RijndaelManaged();
aes.Mode = CipherMode.ECB;
aes.Padding = PaddingMode.PKCS7;
aes.KeySize = 128;
//aes.Key = _key;
aes.Key = key;
//aes.IV = _iV;
CryptoStream cryptoStream = new CryptoStream(mStream, aes.CreateEncryptor(), CryptoStreamMode.Write);
try
{
cryptoStream.Write(plainBytes, 0, plainBytes.Length);
cryptoStream.FlushFinalBlock();
return mStream.ToArray();
}
finally
{
cryptoStream.Close();
mStream.Close();
aes.Clear();
}
}
}
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希望通过这篇文章大家对AES加密解密有所了解，对C#程序设计有所帮助。
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