c#文件加密解密
废话没有,直接上代码,转自博客园1.文件加密代码
using System;
using System.Collections.Generic;
using System.Text;
using System.Runtime.Serialization;
using System.IO;
using System.Security.Cryptography;
namespace Sky.Encrypt
{
/// <summary>
/// 加密
/// </summary>
public class Encryption
{
/// <summary>
/// 生成证书文件
/// </summary>
/// <param name="data">注册信息</param>
/// <param name="fileName">证书文件路径</param>
/// <param name="key"></param>
public void GenerateFile(string data,string fileName,string key)
{
string str = this.EncryptString(data, key);
this.SerializeFile(str,fileName);
}
/// <summary>
/// 序列化对象
/// </summary>
/// <param name="data">数据字符串</param>
/// <param name="path">文件路径</param>
private void SerializeFile(string data, string path)
{
IFormatter binaryFormatter = new System.Runtime.Serialization.Formatters.Binary.BinaryFormatter();
if(data!=null)
{
using (FileStream fileStream = new FileStream(path, FileMode.Create, FileAccess.Write))
{
binaryFormatter.Serialize(fileStream, data);
fileStream.Close();
}
}
}
public string EncryptString(string data, string key)
{
string str = string.Empty;
if(string.IsNullOrEmpty(data))
{
return str;
}
MemoryStream ms = new MemoryStream();
byte[] myKey = Encoding.UTF8.GetBytes(key);
byte[] myIV = { 0x12, 0x34, 0x56, 0x78, 0x90, 0xAB, 0xCD, 0xEF };
DES myProvider = new DESCryptoServiceProvider();
CryptoStream cs = new CryptoStream(ms, myProvider.CreateEncryptor(myKey, myIV), CryptoStreamMode.Write);
try
{
byte[] bs = Encoding.UTF8.GetBytes(data);
cs.Write(bs, 0, bs.Length);
cs.FlushFinalBlock();
str = Convert.ToBase64String(ms.ToArray());
}
finally
{
cs.Close();
ms.Close();
}
return str;
}
}
}
2.文件解密代码
using System;
using System.Collections.Generic;
using System.Text;
using System.IO;
using System.Runtime.Serialization;
using System.Security.Cryptography;
namespace Sky.Decrypt
{
/// <summary>
/// 解密
/// </summary>
public class Decryption
{
public Decryption()
{
}
/// <summary>
/// 获取文件内容——字符串
/// </summary>
/// <param name="path">文件路径</param>
/// <returns>文件内容</returns>
public string GetString(string path)
{
return this.DeserializeFile(path);
}
/// <summary>
/// 反序列化文件
/// </summary>
/// <param name="path">文件路径</param>
/// <returns>文件内容</returns>
private string DeserializeFile(string path)
{
string str = "";
if(!File.Exists(path))
{
throw new Exception("File is not exist!");
}
IFormatter binaryFormatter = new System.Runtime.Serialization.Formatters.Binary.BinaryFormatter();
using(FileStream fileStream=new FileStream(path,FileMode.Open,FileAccess.Read))
{
str = (string)binaryFormatter.Deserialize(fileStream);
fileStream.Close();
}
return str;
}
public string DecryptString(string data,string key)
{
string str = string.Empty;
if(string.IsNullOrEmpty(data))
{
throw new Exception("data is empty");
}
MemoryStream ms = new MemoryStream();
byte[] myKey = Encoding.UTF8.GetBytes(key);
byte[] myIV = { 0x12, 0x34, 0x56, 0x78, 0x90, 0xAB, 0xCD, 0xEF };
DES myProvider = new DESCryptoServiceProvider();
CryptoStream cs = new CryptoStream(ms, myProvider.CreateDecryptor(myKey, myIV), CryptoStreamMode.Write);
try
{
byte[] bs =Convert.FromBase64String(data);
cs.Write(bs, 0, bs.Length);
cs.FlushFinalBlock();
str = Encoding.UTF8.GetString(ms.ToArray());
}
finally
{
cs.Close();
ms.Close();
}
return str;
}
}
}
调用方法:
调用加密文件:Encryption encry = new Encryption();string xmldata = File.ReadAllText("文件路径1");string data = encry.EncryptString(xmldata,"abcdefgh");//abcdefgh关键,密码File.WriteAllText("保存到文件2",data);解密Decryption decrypt = new Decryption();string strData = File.ReadAllText("保存到文件2");string newData = decrypt.DecryptString(strData,"abcdefgh");//abcdefgh加密是的密钥
文件的加密和解密有这么长 谢谢分享 谢谢分享,学习学习
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