public ECPoint RandomizeToken(AnonymousTokenState state, GenerateTokenResponseModel tokenResponse, ECPoint K)
{
var Q = _ecParameters.Curve.DecodePoint(Convert.FromBase64String(tokenResponse.SignedPoint));
var c = new BigInteger(Convert.FromBase64String(tokenResponse.ProofChallenge));
var z = new BigInteger(Convert.FromBase64String(tokenResponse.ProofResponse));
return(_initiator.RandomiseToken(_ecParameters, K, state.P, Q, c, z, state.r));
}
public ECPoint RandomizeToken(AnonymousTokenState state, GenerateTokenResponseModel tokenResponse, ECPublicKeyParameters K)
{
var Q = _ecParameters.Curve.DecodePoint(Hex.Decode(tokenResponse.QAsHex));
var c = new BigInteger(Hex.Decode(tokenResponse.ProofCAsHex));
var z = new BigInteger(Hex.Decode(tokenResponse.ProofZAsHex));
return(_initiator.RandomiseToken(_ecParameters, K, state.P, Q, c, z, state.r));
}
private async Task <GenerateTokenResponseModel> RequestTokenGeneration(AnonymousTokenState state)
{
var request = new HttpRequestMessage(HttpMethod.Post, OAuthConf.OAUTH2_ANONTOKEN_URL);
request.Headers.Add("Authorization", $"Bearer {AuthenticationState.PersonalData?.Access_token}");
var tokenRequest = new GenerateTokenRequestModel
{
MaskedPoint = Convert.ToBase64String(state.P.GetEncoded())
};
request.Content = new StringContent(JsonConvert.SerializeObject(tokenRequest), Encoding.UTF8, "application/json");
var response = await new HttpClient().SendAsync(request);
if (!response.IsSuccessStatusCode)
{
throw new WebServiceHttpException(response, OAuthConf.OAUTH2_ANONTOKEN_URL);
}
return(JsonConvert.DeserializeObject <GenerateTokenResponseModel>(await response.Content.ReadAsStringAsync()));
}
string EncodeToken(AnonymousTokenState tokenState, ECPoint W, string keyId)
{
var t = tokenState.t;
return(Convert.ToBase64String(W.GetEncoded()) + "." + Convert.ToBase64String(t) + "." + keyId);
}