/// <summary>
/// 获取解密字符串 UTF-8
/// </summary>
/// <param name="filePath"></param>
/// <param name="passKey"></param>
/// <param name="outString"></param>
/// <returns></returns>
public static bool Rc4DecryptFromFileOutString(string filePath, string passKey, out string outString)
{
if (!File.Exists(filePath))
{
outString = string.Empty;
return(false);
}
#region 读
byte[] buffer;
using (FileStream fsRead = File.Open(filePath, FileMode.Open, FileAccess.Read))
{
buffer = new byte[fsRead.Length];
int n = fsRead.Read(buffer, 0, buffer.Length);
}
Rc4Encryption rc4 = new Rc4Encryption();
byte[] buffer_out = rc4.DecryptEx(buffer, passKey);
#endregion
outString = Encoding.UTF8.GetString(buffer_out);
if (string.IsNullOrWhiteSpace(outString))
{
return(false);
}
else
{
return(true);
}
}
/// <summary>
/// 获取解密文件
/// </summary>
/// <param name="inputFilePath"></param>
/// <param name="outputFilePath"></param>
/// <param name="passKey"></param>
public static void Rc4DecryptFile(string inputFilePath, string outputFilePath, string passKey)
{
#region 读
byte[] buffer;
using (FileStream fsRead = File.Open(inputFilePath, FileMode.Open, FileAccess.Read))
{
buffer = new byte[fsRead.Length];
int n = fsRead.Read(buffer, 0, buffer.Length);
}
Rc4Encryption rc4 = new Rc4Encryption();
byte[] buffer_out = rc4.DecryptEx(buffer, passKey);
#endregion
#region 写
using (FileStream fsWrite = File.Open(outputFilePath, FileMode.Create, FileAccess.Write))
{
fsWrite.Write(buffer_out, 0, buffer_out.Length);
}
#endregion
}