///随机数加密
byte[] randomByte = new byte[16];//创建字节数组 //实例化加密随机数生成器 RNGCryptoServiceProvider rng = new RNGCryptoServiceProvider(); rng.GetBytes(randomByte);//随机数填充数组 Guid randguid = new Guid(randomByte);//生成标识符 this.txt.Text = randguid.ToString();//显示
/// <summary> /// 字符串不对称加密和解密 /// </summary> private RSACryptoServiceProvider rsa;//密码类 RSAParameters para;//参数 byte[] pridata; public Form1() { InitializeComponent(); rsa = new RSACryptoServiceProvider(); para = rsa.ExportParameters(true); rsa.Clear(); rsa = new RSACryptoServiceProvider(); rsa.ImportParameters(para); } private void Encrypt_Click(object sender, EventArgs e) { //转化加密文本 byte[] dataEncrypt = Encoding.UTF8.GetBytes(txtPlainText.Text); byte[] encText = rsa.Encrypt(dataEncrypt, false);//加密 txtCipherText.Text = Encoding.UTF8.GetString(encText);//产生加密文本 pridata = encText; } private void Decrypt_Click(object sender, EventArgs e) { byte[] cyarray = rsa.Decrypt(pridata, false); txtResultText.Text = Encoding.UTF8.GetString(cyarray);//解密 }
/// <summary> /// 对称加密算法加密数据到文件 /// </summary> Rijndael rj = Rijndael.Create();//声明密码对象 private void Encrypt_Click(object sender, EventArgs e) { //定义加密转换运算 ICryptoTransform crt = rj.CreateEncryptor(); //打开文件用于写数据 FileStream fs = new FileStream(@"d: estfile.bin", FileMode.Create); //创建加密数据流 CryptoStream cs = new CryptoStream(fs, crt, CryptoStreamMode.Write); //创建写数据流 StreamWriter sw = new StreamWriter(cs); sw.Write(PlainText.Text);//写入数据 sw.Flush();//清理缓冲区 cs.FlushFinalBlock(); sw.Close(); } private void Decrypt_Click(object sender, EventArgs e) { ICryptoTransform crt = rj.CreateDecryptor();//定义解密转换运算 //打开文件读取数据 FileStream fs = new FileStream(@"d: estfile.bin", FileMode.Open); //创建解密转换流 CryptoStream cs = new CryptoStream(fs, crt, CryptoStreamMode.Read); StreamReader sr = new StreamReader(cs);//创建读取数据流 string text = sr.ReadToEnd();//读取数据 sr.Close(); PlainText.Text = text; }
/// <summary> /// 图片用于解密加密文件 /// </summary> private void Encrypt_Click(object sender, EventArgs e) { try { if (picFilePath.ImageLocation == null) { MessageBox.Show("请选择一幅图片用于加密"); return; } if (txtFilePath.Text == "") { MessageBox.Show("请选择加密文件路径"); return; } //图片流 FileStream fsPic = new FileStream(picFilePath.ImageLocation, FileMode.Open, FileAccess.Read); //加密文件流 FileStream fsText = new FileStream(txtFilePath.Text, FileMode.Open, FileAccess.Read); //初始化Key IV byte[] bykey = new byte[16]; byte[] byIv = new byte[8]; fsPic.Read(bykey, 0, 16); fsPic.Read(byIv, 0, 8); //临时加密文件 string strPath = txtFilePath.Text;//加密文件的路径 int intLent = strPath.LastIndexOf("\") + 1; int intLong = strPath.Length; string strName = strPath.Substring(intLent, intLong - intLent);//要加密的文件名称 string strLinPath = "C:\" + strName;//临时加密文件路径 FileStream fsOut = File.Open(strLinPath, FileMode.Create, FileAccess.Write); //开始加密 RC2CryptoServiceProvider desc = new RC2CryptoServiceProvider();//des进行加密 BinaryReader br = new BinaryReader(fsText);//从要加密的文件中读出文件内容 CryptoStream cs = new CryptoStream(fsOut, desc.CreateEncryptor(bykey, byIv), CryptoStreamMode.Write);//写入临时加密文件 cs.Write(br.ReadBytes((int)fsText.Length), 0, (int)fsText.Length);//写入加密流 cs.FlushFinalBlock(); cs.Flush(); cs.Close(); fsPic.Close(); fsText.Close(); fsOut.Close(); File.Delete(txtFilePath.Text.TrimEnd());//删除原文件 File.Copy(strLinPath, txtFilePath.Text);//复制加密文件 File.Delete(strLinPath);//删除临时文件 MessageBox.Show("加密成功"); } catch (Exception ex) { MessageBox.Show(ex.Message); } } private void Decrypt_Click(object sender, EventArgs e) { try { //图片流 FileStream fsPic = new FileStream(picFilePath.ImageLocation, FileMode.Open, FileAccess.Read); //解密文件流 FileStream fsOut = File.Open(txtFilePath.Text, FileMode.Open, FileAccess.Read); //初始化Key IV byte[] bykey = new byte[16]; byte[] byIv = new byte[8]; fsPic.Read(bykey, 0, 16); fsPic.Read(byIv, 0, 8); //临时解密文件 string strPath = txtFilePath.Text;//加密文件的路径 int intLent = strPath.LastIndexOf("\") + 1; int intLong = strPath.Length; string strName = strPath.Substring(intLent, intLong - intLent);//要加密的文件名称 string strLinPath = "C:\" + strName;//临时解密文件路径 FileStream fs = new FileStream(strLinPath, FileMode.Create, FileAccess.Write); //开始解密 RC2CryptoServiceProvider desc = new RC2CryptoServiceProvider();//des进行解 CryptoStream csDecrypt = new CryptoStream(fsOut, desc.CreateDecryptor(bykey, byIv), CryptoStreamMode.Read);//读出加密文件 BinaryReader sr = new BinaryReader(csDecrypt);//从要加密流中读出文件内容 BinaryWriter sw = new BinaryWriter(fs);//写入解密流 sw.Write(sr.ReadBytes(Convert.ToInt32(fsOut.Length)));// sw.Flush(); sw.Close(); sr.Close(); fs.Close(); fsOut.Close(); fsPic.Close(); csDecrypt.Flush(); File.Delete(txtFilePath.Text.TrimEnd());//删除原文件 File.Copy(strLinPath, txtFilePath.Text);//复制加密文件 File.Delete(strLinPath);//删除临时文件 MessageBox.Show("解密成功"); picFilePath.ImageLocation = null; txtFilePath.Text = ""; } catch (Exception ex) { MessageBox.Show(ex.Message); } }
/// <summary> /// 密钥对文件加密解密 /// </summary> public Form1() { InitializeComponent(); rij = new RijndaelManaged(); } private RijndaelManaged rij; private void Encrypt_Click(object sender, EventArgs e) { if (txtFilePath.Text == "") { MessageBox.Show("请选择要加密的文件"); } else { try { if (txtPK.Text.Length >= 8 && txtPK.Text.Length <= 16) { string strPath = txtFilePath.Text;//加密文件的路径 int intLent = strPath.LastIndexOf("\") + 1; int intLong = strPath.Length; string strName = strPath.Substring(intLent, intLong - intLent);//要加密的文件名称 int intTxt = strName.LastIndexOf("."); int intTextLeng = strName.Length; string strTxt = strName.Substring(intTxt, intTextLeng - intTxt);//取出文件的扩展名 strName = strName.Substring(0, intTxt); //加密后的文件名及路径 string strOutName = strPath.Substring(0, strPath.LastIndexOf("\") + 1) + strName + "Out" + strTxt; byte[] key = Encoding.Default.GetBytes(txtPK.Text);//获取密钥 byte[] IV = rij.IV;//获取分组长度 RijndaelManaged myRijndael = new RijndaelManaged();//加密对象 FileStream fsOut = File.Open(strOutName, FileMode.Create, FileAccess.Write); FileStream fsIn = File.Open(strPath, FileMode.Open, FileAccess.Read); //写入加密文本文件 CryptoStream csDecrypt = new CryptoStream(fsOut, myRijndael.CreateEncryptor(key, IV), CryptoStreamMode.Write); //读加密文本 BinaryReader br = new BinaryReader(fsIn); csDecrypt.Write(br.ReadBytes((int)fsIn.Length), 0, (int)fsIn.Length); csDecrypt.FlushFinalBlock(); csDecrypt.Close(); fsIn.Close(); fsOut.Close(); if (MessageBox.Show(strOutName, "提示:加密成功!加密后的文件名及路径为: " + "是否删除源文件", MessageBoxButtons.YesNo) == DialogResult.Yes) { File.Delete(strPath); txtFilePath.Text = ""; } else { txtFilePath.Text = ""; } } else MessageBox.Show("密码长度超出范围！"); } catch (Exception ee) { MessageBox.Show(ee.Message); } } } private void Decrypt_Click(object sender, EventArgs e) { if (txtFilePath.Text == "") { MessageBox.Show("请选择要解密的文件路径"); } else { if (txtPK.Text.Length >= 8 && txtPK.Text.Length <= 16) { string strPath = txtFilePath.Text;//加密文件的路径 int intLent = strPath.LastIndexOf("\") + 1; int intLong = strPath.Length; string strName = strPath.Substring(intLent, intLong - intLent);//要加密的文件名称 int intTxt = strName.LastIndexOf("."); int intTextLeng = strName.Length; strName = strName.Substring(0, intTxt); if (strName.LastIndexOf("Out") != -1) { strName = strName.Substring(0, strName.LastIndexOf("Out")); } else { strName = strName + "In"; } //加密后的文件名及路径 string strInName = strPath.Substring(0, strPath.LastIndexOf("\") + 1) + strName + ".txt"; byte[] key = Encoding.Default.GetBytes(txtPK.Text); byte[] IV = rij.IV; RijndaelManaged myRijndael = new RijndaelManaged(); FileStream fsOut = File.Open(strPath, FileMode.Open, FileAccess.Read); CryptoStream csDecrypt = new CryptoStream(fsOut, myRijndael.CreateDecryptor(key, IV), CryptoStreamMode.Read); StreamReader sr = new StreamReader(csDecrypt);//把文件读出来 StreamWriter sw = new StreamWriter(strInName);//解密后文件写入一个新的文件 sw.Write(sr.ReadToEnd()); sw.Flush(); sw.Close(); sr.Close(); fsOut.Close(); if (MessageBox.Show(strInName, "提示:解密成功!解密后的文件名及路径为:" + "是否删除源文件", MessageBoxButtons.YesNo) == DialogResult.Yes) { File.Delete(strPath); txtFilePath.Text = ""; } else { txtFilePath.Text = ""; } } else MessageBox.Show("密码长度超出范围！"); } }
/// <summary> /// 数据加密为文件 /// </summary> public Form1() { InitializeComponent(); //创建DES密钥 des = new DESCryptoServiceProvider(); Key = "wjshan0808"; } private DESCryptoServiceProvider des;//实例化DES对象 private string Key;//密钥 private void Encrypt_Click(object sender, EventArgs e) { byte[] privateKey1 = Encoding.Default.GetBytes(Key.Substring(0, 8));//对称算法的密钥 byte[] privateKey2 = privateKey1;//初始向量 byte[] data = Encoding.Default.GetBytes(txtPlainText.Text); MemoryStream ms = new MemoryStream(); CryptoStream cs = new CryptoStream(ms, des.CreateEncryptor(privateKey1, privateKey2), CryptoStreamMode.Write); //将字节序列写入当前流，并将流的当前位置提升写入的字节数 cs.Write(data, 0, data.Length); cs.FlushFinalBlock(); StreamWriter sw = new StreamWriter("EncryptFile.txt"); sw.WriteLine(Convert.ToBase64String(ms.ToArray()) + ' '); sw.Close(); } private void Decrypt_Click(object sender, EventArgs e) { byte[] privateKey1 = Encoding.Default.GetBytes(Key.Substring(0, 8));//对称算法的密钥 byte[] privateKey2 = privateKey1;//初始向量 StreamReader sr = new StreamReader("EncryptFile.txt"); byte[] data = Convert.FromBase64String(sr.ReadToEnd()); MemoryStream ms = new MemoryStream(); CryptoStream cs = new CryptoStream(ms, des.CreateDecryptor(privateKey1, privateKey2), CryptoStreamMode.Write); cs.Write(data, 0, data.Length); cs.FlushFinalBlock(); StreamWriter sw = new StreamWriter("DecryptFile.txt"); sw.WriteLine(Encoding.UTF8.GetString(ms.ToArray())); sw.Close(); }