/// <summary>
/// DES加密文件
/// </summary>
/// <param name="inputDESIV">密钥向量</param>
/// <param name="inputDESKEY">密钥</param>
/// <param name="inputFileName">待加密文件的文件名</param>
/// <returns>成功返回true,失败返回false</returns>
public static bool DesEncryptFile_(byte[] inputDESIV, string inputDESKEY, string inputFileName)
{
//输出文件名
string strOUTPUT = "";
//输入流
FileStream fsINPUT = null;
//输出流
FileStream fsOUTPUT = null;
try
{
if (inputDESKEY.Length < 16)
{
//字节形式密钥向量
byte[] bytesDESIV = inputDESIV;
//字节形式加密密钥
byte[] bytesDESKEY = Encoding.UTF8.GetBytes(inputDESKEY.Substring(0, 8));
//长文件名形式输出文件的文件名
strOUTPUT = Path.GetDirectoryName(inputFileName) + "\\" + Path.GetFileNameWithoutExtension(inputFileName) + "_加密副本" + Path.GetExtension(inputFileName);
//文件流形式输入
fsINPUT = new FileStream(inputFileName, FileMode.Open, FileAccess.Read);
//文件流形式输出
fsOUTPUT = new FileStream(strOUTPUT, FileMode.Create, FileAccess.Write);
//字节形式输入文件
byte[] bytesINPUTFILE = new byte[fsINPUT.Length];
//声明一个新的DES对象
DESCryptoServiceProvider desEncrypt = new DESCryptoServiceProvider();
//把输出流对象包装成加密流对象
CryptoStream csEncrypt = new CryptoStream(fsOUTPUT, desEncrypt.CreateEncryptor(bytesDESKEY, bytesDESIV), CryptoStreamMode.Write);
//输入流读取文件
fsINPUT.Read(bytesINPUTFILE, 0, bytesINPUTFILE.Length);
//把字节写入加密流
csEncrypt.Write(bytesINPUTFILE, 0, bytesINPUTFILE.Length);
//关闭加密流对象
csEncrypt.Close();
//关闭输出流对象
fsOUTPUT.Close();
//关闭输入流对象
fsINPUT.Close();
//返回true
return true;
}
else
{
//字节形式密钥向量
byte[] bytesDESIV = inputDESIV;
//字节形式加密密钥
byte[] bytesDESKEY = Encoding.UTF8.GetBytes(inputDESKEY);
//长文件名形式输出文件的文件名
strOUTPUT = Path.GetDirectoryName(inputFileName) + "\\" + Path.GetFileNameWithoutExtension(inputFileName) + "_加密副本" + Path.GetExtension(inputFileName);
//文件流形式输入
fsINPUT = new FileStream(inputFileName, FileMode.Open, FileAccess.Read);
//文件流形式输出
fsOUTPUT = new FileStream(strOUTPUT, FileMode.Create, FileAccess.Write);
//字节形式输入文件
byte[] bytesINPUTFILE = new byte[fsINPUT.Length];
//声明一个新的DES对象
RijndaelManaged rmEncrypt = new RijndaelManaged();
//设置DES对象密钥长度
rmEncrypt.KeySize = inputDESKEY.Length * 8;
//把输出流对象包装成加密流对象
CryptoStream csEncrypt = new CryptoStream(fsOUTPUT, rmEncrypt.CreateEncryptor(bytesDESKEY, bytesDESIV), CryptoStreamMode.Write);
//输入流读取文件
fsINPUT.Read(bytesINPUTFILE, 0, bytesINPUTFILE.Length);
//把字节写入加密流
csEncrypt.Write(bytesINPUTFILE, 0, bytesINPUTFILE.Length);
//关闭加密流对象
csEncrypt.Close();
//关闭输出流对象
fsOUTPUT.Close();
//关闭输入流对象
fsINPUT.Close();
//返回true
return true;
}
}
catch
{
try
{
//关闭输出流对象
fsOUTPUT.Close();
//删除文件
File.Delete(strOUTPUT);
}
catch
{
}
//返回false
return false;
}
}
/// <summary>
/// DES解密文件
/// </summary>
/// <param name="inputDESIV">密钥向量</param>
/// <param name="inputDESKEY">密钥</param>
/// <param name="inputFileName">待解密文件的文件名</param>
/// <returns>成功返回true,失败返回false</returns>
public static bool DesDecryptFile_(byte[] inputDESIV, string inputDESKEY, string inputFileName)
{
//输出文件名
string strOUTPUT = "";
//输入流
FileStream fsINPUT = null;
//输出流
FileStream fsOUTPUT = null;
try
{
if (inputDESKEY.Length < 16)
{
//字节形式密钥向量
byte[] bytesDESIV = inputDESIV;
//字节形式加密密钥
byte[] bytesDESKEY = Encoding.UTF8.GetBytes(inputDESKEY.Substring(0, 8));
//长文件名形式输出文件的文件名
strOUTPUT = Path.GetDirectoryName(inputFileName) + "\\" + Path.GetFileNameWithoutExtension(inputFileName) + "_解密副本" + Path.GetExtension(inputFileName);
//文件流形式输入
fsINPUT = new FileStream(inputFileName, FileMode.Open, FileAccess.Read);
//文件流形式输出
fsOUTPUT = new FileStream(strOUTPUT, FileMode.Create, FileAccess.Write);
//字节形式输入文件
byte[] bytesINPUTFILE = new byte[fsINPUT.Length];
//声明一个新的DES对象
DESCryptoServiceProvider desDecrypt = new DESCryptoServiceProvider();
//把输出流对象包装成解密流对象
CryptoStream csDecrypt = new CryptoStream(fsOUTPUT, desDecrypt.CreateDecryptor(bytesDESKEY, bytesDESIV), CryptoStreamMode.Write);
//输入流读取文件
fsINPUT.Read(bytesINPUTFILE, 0, bytesINPUTFILE.Length);
//把字节写入解密流
csDecrypt.Write(bytesINPUTFILE, 0, bytesINPUTFILE.Length);
//关闭解密流对象
csDecrypt.Close();
//关闭输出流对象
fsOUTPUT.Close();
//关闭输入流对象
fsINPUT.Close();
//返回true
return true;
}
else
{
//字节形式密钥向量
byte[] bytesDESIV = inputDESIV;
//字节形式加密密钥
byte[] bytesDESKEY = Encoding.UTF8.GetBytes(inputDESKEY);
//长文件名形式输出文件的文件名
strOUTPUT = Path.GetDirectoryName(inputFileName) + "\\" + Path.GetFileNameWithoutExtension(inputFileName) + "_解密副本" + Path.GetExtension(inputFileName);
//文件流形式输入
fsINPUT = new FileStream(inputFileName, FileMode.Open, FileAccess.Read);
//文件流形式输出
fsOUTPUT = new FileStream(strOUTPUT, FileMode.Create, FileAccess.Write);
//字节形式输入文件
byte[] bytesINPUTFILE = new byte[fsINPUT.Length];
//声明一个新的DES对象
RijndaelManaged rmDecrypt = new RijndaelManaged();
//设置DES对象密钥长度
rmDecrypt.KeySize = inputDESKEY.Length * 8;
//把输出流对象包装成解密流对象
CryptoStream csDecrypt = new CryptoStream(fsOUTPUT, rmDecrypt.CreateDecryptor(bytesDESKEY, bytesDESIV), CryptoStreamMode.Write);
//输入流读取文件
fsINPUT.Read(bytesINPUTFILE, 0, bytesINPUTFILE.Length);
//把字节写入解密流
csDecrypt.Write(bytesINPUTFILE, 0, bytesINPUTFILE.Length);
//关闭解密流对象
csDecrypt.Close();
//关闭输出流对象
fsOUTPUT.Close();
//关闭输入流对象
fsINPUT.Close();
//返回true
return true;
}
}
catch
{
try
{
//关闭输出流对象
fsOUTPUT.Close();
//删除文件
File.Delete(strOUTPUT);
}
catch
{
}
//返回false
return false;
}
}
