///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:\testfile.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:\testfile.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:\n" + "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()) + '\n');
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();
}
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