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【CSharp】对图片加密解密

作者:rozbo / 发布于2014/6/6/ 591

思路就是读入文件，然后对其二进制代码进行加密~揭秘的时候反之即可


	using System;
	using System.Collections.Generic;
	using System.Text;
	using System.Security.Cryptography;
	using System.IO;
	namespace Net.Template.Common
	{
	/// <summary> /// 对图片的加密和解密 /// </summary>
	public class DEncrypt4ImageHelper
	{
	public DEncrypt4ImageHelper() { }
	#region 加密方法 图片加密
	/// <summary> /// 图片加密 /// </summary> /// <param name="filePath">源文件</param> /// <param name="savePath">保存为文件名称</param> /// <param name="keyStr">密钥</param>
	public static void EncryptFile(string filePath, string savePath, string keyStr)
	{
	//通过des加密
	DESCryptoServiceProvider des = new DESCryptoServiceProvider();
	//通过流打开文件
	FileStream fs = File.OpenRead(filePath);
	//获取文件二进制字符 byte[] inputByteArray = newbyte[fs.Length];
	//读流文件
	fs.Read(inputByteArray, 0, (int)fs.Length);
	//关闭流
	fs.Close();
	//获得加密字符串二进制字符 byte[] keyByteArray = Encoding.Default.GetBytes(keyStr);
	//计算指定字节组指定区域哈希值
	SHA1 ha = new SHA1Managed();
	byte[] hb = ha.ComputeHash(keyByteArray);
	//加密密钥数组 byte[] sKey = newbyte[8];
	//加密变量 byte[] sIV = newbyte[8];
	for (int i = 0; i < 8; i++)
	sKey[i] = hb[i];
	for (int i = 8; i < 16; i++)
	sIV[i - 8] = hb[i];
	//获取加密密钥
	des.Key = sKey;
	//设置加密初始化向量
	des.IV = sIV;
	MemoryStream ms = new MemoryStream();
	CryptoStream cs = new CryptoStream(ms, des.CreateEncryptor(), CryptoStreamMode.Write);
	cs.Write(inputByteArray, 0, inputByteArray.Length);
	cs.FlushFinalBlock();
	fs = File.OpenWrite(savePath);
	foreach (byte b in ms.ToArray())
	{
	fs.WriteByte(b);
	}
	fs.Close();
	cs.Close();
	ms.Close();
	}
	#endregion#region 解密方法 图片解密
	/// <summary> /// 图片解密 /// </summary> /// <param name="filePath">源文件</param> /// <param name="savePath">保存文件</param> /// <param name="keyStr">密钥</param>
	public static void DecryptFile(string filePath, string savePath, string keyStr)
	{
	//通过des解密
	DESCryptoServiceProvider des = new DESCryptoServiceProvider();
	//通过流读取文件
	FileStream fs = File.OpenRead(filePath);
	//获取文件二进制字符 byte[] inputByteArray = newbyte[fs.Length];
	//读取流文件
	fs.Read(inputByteArray, 0, (int)fs.Length);
	//关闭流
	fs.Close();
	//密钥数组 byte[] keyByteArray = Encoding.Default.GetBytes(keyStr);
	//定义哈希变量
	SHA1 ha = new SHA1Managed();
	//计算指定字节组指定区域哈希值 byte[] hb = ha.ComputeHash(keyByteArray);
	//加密密钥数组 byte[] sKey = newbyte[8];
	//加密变量 byte[] sIV = newbyte[8];
	for (int i = 0; i < 8; i++)
	sKey[i] = hb[i];
	for (int i = 8; i < 16; i++)
	sIV[i - 8] = hb[i];
	//获取加密密钥
	des.Key = sKey;
	//加密变量
	des.IV = sIV;
	MemoryStream ms = new MemoryStream();
	CryptoStream cs = new CryptoStream(ms, des.CreateDecryptor(), CryptoStreamMode.Write);
	cs.Write(inputByteArray, 0, inputByteArray.Length);
	cs.FlushFinalBlock();
	fs = File.OpenWrite(savePath);
	foreach (byte b in ms.ToArray())
	{
	fs.WriteByte(b);
	}
	fs.Close();
	cs.Close();
	ms.Close();
	}
	#endregion
	}
	}

试试其它关键字

　加密解密,图片　

同语言下

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