下面我将详细讲解如何使用C#实现DES和AES加密解密功能的攻略,包含以下内容:
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什么是DES和AES
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DES和AES的区别
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C#中实现DES加密解密的步骤
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C#中实现AES加密解密的步骤
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示例说明
1.什么是DES和AES
DES(Data Encryption Standard)和AES(Advanced Encryption Standard)都是对数据进行加密、解密的算法。DES是一种对称加密算法,是密码学中最经典的算法之一,AES是一种对称加密算法,是目前使用最广泛的算法之一。
2.DES和AES的区别
DES是一种比较老的算法,被证明安全性不足,而AES是一种更加强大、安全的算法,可以有效地保护数据安全。
3.C#中实现DES加密解密的步骤
3.1.创建一个实现对称算法的加密器
DES des = DES.Create();
3.2.设置加密密钥和初始化向量
des.Key = Encoding.UTF8.GetBytes("1234567812345678");
des.IV = Encoding.UTF8.GetBytes("1234567812345678");
3.3.创建一个加密流
ICryptoTransform encryptor = des.CreateEncryptor();
3.4.创建一个输出流
MemoryStream msEncrypt = new MemoryStream();
3.5.创建一个加密器流
CryptoStream csEncrypt = new CryptoStream(msEncrypt, encryptor, CryptoStreamMode.Write);
3.6.写入加密流
csEncrypt.Write(plainTextBytes, 0, plainTextBytes.Length);
csEncrypt.FlushFinalBlock();
3.7.将加密后的字节数组转换为字符串
string cipherText = Convert.ToBase64String(msEncrypt.ToArray());
3.8.解密时,同样需要进行上述步骤,只不过需要创建一个解密流进行解密。
4.C#中实现AES加密解密的步骤
4.1.创建一个实现对称算法的加密器
Aes aes = Aes.Create();
4.2.设置加密密钥和初始化向量
aes.Key = Encoding.UTF8.GetBytes("12345678123456781234567812345678");
aes.IV = Encoding.UTF8.GetBytes("1234567812345678");
4.3.创建一个加密流
ICryptoTransform encryptor = aes.CreateEncryptor();
4.4.创建一个输出流
MemoryStream msEncrypt = new MemoryStream();
4.5.创建一个加密器流
CryptoStream csEncrypt = new CryptoStream(msEncrypt, encryptor, CryptoStreamMode.Write);
4.6.写入加密流
csEncrypt.Write(plainTextBytes, 0, plainTextBytes.Length);
csEncrypt.FlushFinalBlock();
4.7.将加密后的字节数组转换为字符串
string cipherText = Convert.ToBase64String(msEncrypt.ToArray());
4.8.解密时,同样需要进行上述步骤,只不过需要创建一个解密流进行解密。
5.示例说明
5.1.对字符串进行DES加密解密:
string plainText = "Hello World!";
byte[] plainTextBytes = Encoding.UTF8.GetBytes(plainText);
// DES加密
DES des = DES.Create();
des.Key = Encoding.UTF8.GetBytes("1234567812345678");
des.IV = Encoding.UTF8.GetBytes("1234567812345678");
ICryptoTransform encryptor = des.CreateEncryptor();
MemoryStream msEncrypt = new MemoryStream();
CryptoStream csEncrypt = new CryptoStream(msEncrypt, encryptor, CryptoStreamMode.Write);
csEncrypt.Write(plainTextBytes, 0, plainTextBytes.Length);
csEncrypt.FlushFinalBlock();
// 将加密后的字节数组转换为字符串
string cipherText = Convert.ToBase64String(msEncrypt.ToArray());
// DES解密
DES desDecrypt = DES.Create();
desDecrypt.Key = Encoding.UTF8.GetBytes("1234567812345678");
desDecrypt.IV = Encoding.UTF8.GetBytes("1234567812345678");
ICryptoTransform decryptor = desDecrypt.CreateDecryptor();
MemoryStream msDecrypt = new MemoryStream(Convert.FromBase64String(cipherText));
CryptoStream csDecrypt = new CryptoStream(msDecrypt, decryptor, CryptoStreamMode.Read);
StreamReader srDecrypt = new StreamReader(csDecrypt);
string decryptedText = srDecrypt.ReadToEnd();
// 输出结果
Console.WriteLine($"明文:{plainText}");
Console.WriteLine($"加密后的密文:{cipherText}");
Console.WriteLine($"解密后的明文:{decryptedText}");
5.2.对字符串进行AES加密解密:
string plainText = "Hello World!";
byte[] plainTextBytes = Encoding.UTF8.GetBytes(plainText);
// AES加密
Aes aes = Aes.Create();
aes.Key = Encoding.UTF8.GetBytes("12345678123456781234567812345678");
aes.IV = Encoding.UTF8.GetBytes("1234567812345678");
ICryptoTransform encryptor = aes.CreateEncryptor();
MemoryStream msEncrypt = new MemoryStream();
CryptoStream csEncrypt = new CryptoStream(msEncrypt, encryptor, CryptoStreamMode.Write);
csEncrypt.Write(plainTextBytes, 0, plainTextBytes.Length);
csEncrypt.FlushFinalBlock();
// 将加密后的字节数组转换为字符串
string cipherText = Convert.ToBase64String(msEncrypt.ToArray());
// AES解密
Aes aesDecrypt = Aes.Create();
aesDecrypt.Key = Encoding.UTF8.GetBytes("12345678123456781234567812345678");
aesDecrypt.IV = Encoding.UTF8.GetBytes("1234567812345678");
ICryptoTransform decryptor = aesDecrypt.CreateDecryptor();
MemoryStream msDecrypt = new MemoryStream(Convert.FromBase64String(cipherText));
CryptoStream csDecrypt = new CryptoStream(msDecrypt, decryptor, CryptoStreamMode.Read);
StreamReader srDecrypt = new StreamReader(csDecrypt);
string decryptedText = srDecrypt.ReadToEnd();
// 输出结果
Console.WriteLine($"明文:{plainText}");
Console.WriteLine($"加密后的密文:{cipherText}");
Console.WriteLine($"解密后的明文:{decryptedText}");
以上就是使用C#实现DES和AES加密解密功能的攻略,希望能对你有所帮助。
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