private void initKey()
{
try
{
/**
* 获取秘钥
* 没有秘钥则产生一对秘钥，并用非明文方式保存秘钥
* */
String strKey = FileReadWrite.Read();
if (String.IsNullOrEmpty(strKey))
{
Key = AesCryptoHelper.CreateKeyAndIv();
strKey = SerializationHelper.Serialization(Key);
strKey = AesCryptoHelper.Encrypt(strKey, keyEncryptorKey);
FileReadWrite.Write(strKey);
}
else
{
strKey = AesCryptoHelper.Decrypt(strKey, keyEncryptorKey);
Key = SerializationHelper.Deserialization(strKey);
}
}
catch (Exception ex)
{
var entity = LogEntityFactory.Create(String.Format("秘钥初始化失败:{0}", ex.ToString()),
LogTypeFacotry.CreateExceptionLogType(),
LogLevelFactory.CreateGravenessLogLevel());
log.SaveLog(entity);
throw new Exception("秘钥初始化失败，秘钥文件被破坏！");
}
}
public async Task SendMessage(string user, string message)
{
var aesDecriptedMesage = AesCryptoHelper.DecryptString_Aes(message);
SaveMessageToLog(user, aesDecriptedMesage);
await Clients.All.SendAsync("ReceiveMessage", user, aesDecriptedMesage);
}
protected virtual byte[] Encryptor(byte[] bytes)
{
/**
* 对数据加密
* 用密码加密数据
* 对数据签名
* */
bytes = Cryptor.Encryptor(bytes);
bytes = AesCryptoHelper.Encrypt(bytes, GetKeyBytesByPasword(), null);
bytes = Sign.Sign(bytes, GetSignBytes());
return(bytes);
}
public async Task <IActionResult> SendMessage([FromBody] Message message)
{
connection = new HubConnectionBuilder()
.WithUrl(hubUrl)
.Build();
await connection.StartAsync();
var aesEncriptedMesage = AesCryptoHelper.EncryptString_Aes(message.MessageContent);
await connection.InvokeAsync("SendMessage", message.User, aesEncriptedMesage);
return(new OkResult());
}
private async void sendButton_Click(object sender, RoutedEventArgs e)
{
try
{
var aesEncriptedMesage = AesCryptoHelper.EncryptString_Aes(messageTextBox.Text);
await connection.InvokeAsync("SendMessage", userTextBox.Text, aesEncriptedMesage);
}
catch (Exception ex)
{
messagesList.Items.Add(ex.Message);
}
}
private string GenerateMasterPassword()
{
var buf = AesCryptoHelper.CreateRandomBuf(32);
for (int i = 0; i < 32; i++)
{
if (buf[i] == 0)
{
buf[i] = 0xff;
}
}
var pass = ConvertUtils.ByteArrayToHexString(buf);
return(pass);
}
protected virtual byte[] Decryptor(byte[] bytes)
{
/**
* 验证签名
* 用密码解密数据
* 对数据码解
* */
if (!Sign.Verify(bytes, GetSignBytes(), out bytes))
{
throw new Exception("密文被篡改！");
}
try
{
bytes = AesCryptoHelper.Decrypt(bytes, GetKeyBytesByPasword(), null);
}
catch (Exception ex)
{
throw new Exception("密码不正确！", ex.InnerException);
}
bytes = Cryptor.Decryptor(bytes);
return(bytes);
}
public byte[] Encryptor(byte[] bytes)
{
return(AesCryptoHelper.Encrypt(bytes, Convert.FromBase64String(Key.Key), Convert.FromBase64String(Key.Value)));
}