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使用DES加密方式加解密文本数据
开发工具：Visual Studio 2013
.NET Framework版本：4.5
public class DesUtil
{
/// <summary>
/// DES加密
/// </summary>
/// <param name="desModel"></param>
/// <returns></returns>
public static byte[] Encrypt(DesModel desModel)
{
//使用8位密钥
byte[] key8 = new byte[8];
//如果我们的密钥不是8为，则自动补全到8位
byte[] byteKey = Encoding.UTF8.GetBytes(desModel.Key.PadRight(key8.Length));
//复制密钥
Array.Copy(byteKey, key8, key8.Length);
//使用8位向量
byte[] iv8 = new byte[8];
//如果我们的向量不是8为，则自动补全到8位
byte[] byteIv = Encoding.UTF8.GetBytes(desModel.IV.PadRight(iv8.Length));
//复制向量
Array.Copy(byteIv, iv8, iv8.Length);
// 创建加密对象
DESCryptoServiceProvider desProvider = new DESCryptoServiceProvider();
desProvider.Mode = desModel.Mode;
desProvider.Padding = desModel.Padding;
desProvider.Key = key8;
desProvider.IV = iv8;
byte[] result = null;
try
{
using (MemoryStream ms = new MemoryStream())
{
using (CryptoStream EncryptStream = new CryptoStream(ms, desProvider.CreateEncryptor(), CryptoStreamMode.Write))
{
EncryptStream.Write(desModel.Data, 0, desModel.Data.Length);
EncryptStream.FlushFinalBlock();
result = ms.ToArray();
}
}
}
catch { }
return result;
}
/// <summary>
/// DES解密
/// </summary>
/// <param name="desModel"></param>
/// <returns></returns>
public static byte[] Decrypt(DesModel desModel)
{
//使用8位密钥
byte[] key8 = new byte[8];
//如果我们的密钥不是8为，则自动补全到8位
byte[] byteKey = Encoding.UTF8.GetBytes(desModel.Key.PadRight(key8.Length));
//复制密钥
Array.Copy(byteKey, key8, key8.Length);
//使用8位向量
byte[] iv8 = new byte[8];
//如果我们的向量不是8为，则自动补全到8位
byte[] byteIv = Encoding.UTF8.GetBytes(desModel.IV.PadRight(iv8.Length));
//复制向量
Array.Copy(byteIv, iv8, iv8.Length);
// 创建解密对象
DESCryptoServiceProvider desProvider = new DESCryptoServiceProvider();
desProvider.Mode = desModel.Mode;
desProvider.Padding = desModel.Padding;
desProvider.Key = key8;
desProvider.IV = iv8;
byte[] result = null;
try
{
using (MemoryStream ms = new MemoryStream(desModel.Data))
{
using (CryptoStream DecryptStream = new CryptoStream(ms, desProvider.CreateDecryptor(), CryptoStreamMode.Read))
{
using (MemoryStream msResult = new MemoryStream())
{
byte[] temp = new byte[1024 * 1024];
int len = 0;
while ((len = DecryptStream.Read(temp, 0, temp.Length)) > 0)
{
msResult.Write(temp, 0, len);
}
result = msResult.ToArray();
}
}
}
}
catch { }
return result;
}
/// <summary>
/// DES加密字符串
/// </summary>
/// <param name="data"></param>
/// <param name="key"></param>
/// <param name="iv"></param>
/// <returns></returns>
public static string Encrypt(string data, string key, string iv = "")
{
byte[] bytes = Encoding.UTF8.GetBytes(data);
byte[] result = Encrypt(new DesModel
{
Data = bytes,
Key = key,
IV = iv,
Mode = CipherMode.CBC,
Padding = PaddingMode.PKCS7
});
if (result == null)
{
return "";
}
return Convert.ToBase64String(result);
}
/// <summary>
/// DES解密字符串
/// </summary>
/// <param name="data"></param>
/// <param name="key"></param>
/// <param name="iv"></param>
/// <returns></returns>
public static string Decrypt(string data, string key, string iv = "")
{
byte[] bytes = Convert.FromBase64String(data);
byte[] result = Decrypt(new DesModel
{
Data = bytes,
Key = key,
IV = iv,
Mode = CipherMode.CBC,
Padding = PaddingMode.PKCS7
});
if (result == null)
{
return "";
}
return Encoding.UTF8.GetString(result);
}
public class DesModel
{
/// <summary>
/// 需要加密/解密的数据
/// </summary>
public byte[] Data { get; set; }
/// <summary>
/// 密钥
/// </summary>
public string Key { get; set; }
/// <summary>
/// 向量
/// </summary>
public string IV { get; set; }
/// <summary>
/// 加密模式
/// </summary>
public CipherMode Mode { get; set; }
/// <summary>
/// 填充模式
/// </summary>
public PaddingMode Padding { get; set; }
}
} private void btn_Des_Encrypt_Click(object sender, EventArgs e)
{
string result = DesUtil.Encrypt(textBox1.Text, "12345678900987654321");
textBox2.Text = result;
}
private void btn_Des_Decrypt_Click(object sender, EventArgs e)
{
string result = DesUtil.Decrypt(textBox2.Text, "12345678900987654321");
textBox1.Text = result;
}
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