/// <summary>
/// Check the status of an HTTP response, and throw an exception if its an error.
/// If we've received an error response, we try to decrypt the body so it can be
/// logged and included in the thrown exception.
/// </summary>
/// <param name="body">The received HTTP response body.</param>
/// <param name="response">The HttpResponseMessage object.</param>
private void CheckStatusAndMaybeThrow(string body, HttpResponseMessage response)
{
if (!response.IsSuccessStatusCode)
{
log.Error($"failed request ({response.StatusCode}): body contents: \"{body}\"");
try
{
EncryptedBody enc = JsonConvert.DeserializeObject <EncryptedBody>(body);
if (enc != null && enc.encrypted_body != null)
{
// we have an EncryptedBody object containing an encrypted response.
// split the text string into cipher text and IV, then decrypt.
string[] parts = enc.encrypted_body.Split('$');
body = Aes256.DecryptText(parts[0], parts[1], GetEncryptionKey());
//log.Error($"decrypted body: \"{body}\"");
}
log.Error($"failed request ({response.StatusCode}): body contents: \"{body}\"");
}
catch (Exception)
{
// ignore any exception that happens during the decryption attempt.
}
// include either the original or decrypted body as the exception message.
throw new RequestException(body);
}
}
public static void Encode(XdrDataOutputStream stream, EncryptedBody encodedEncryptedBody)
{
int EncryptedBodysize = encodedEncryptedBody.InnerValue.Length;
stream.WriteInt(EncryptedBodysize);
stream.Write(encodedEncryptedBody.InnerValue, 0, EncryptedBodysize);
}
public static EncryptedBody Decode(XdrDataInputStream stream)
{
EncryptedBody decodedEncryptedBody = new EncryptedBody();
int EncryptedBodysize = stream.ReadInt();
decodedEncryptedBody.InnerValue = new byte[EncryptedBodysize];
stream.Read(decodedEncryptedBody.InnerValue, 0, EncryptedBodysize);
return(decodedEncryptedBody);
}
private T DecryptBody <T>(string body)
{
// do not check _data.Encrypt to determine if the response is encrpyted, cause that
// won't work in the initial stages (e.g., start, login). instead, see if the
// deserialized object contains a property called "encryptedBody".
EncryptedBody encBody = JsonConvert.DeserializeObject <EncryptedBody>(body);
if (encBody == null || encBody.encrypted_body == null)
{
// deserialize directly into the expected type.
log.Info($"clear-text body: \"{body}\"");
return(JsonConvert.DeserializeObject <T>(body));
}
// we have an EncryptedBody object containing an encrypted response.
// split the text string into cipher text and IV, then decrypt.
log.Debug($"encrypted body: \"{body}\"");
string[] parts = encBody.encrypted_body.Split('$');
body = Aes256.DecryptText(parts[0], parts[1], GetEncryptionKey());
log.Debug($"decrypted body: \"{body}\"");
return(JsonConvert.DeserializeObject <T>(body));
}
