private async Task<SuccessfulAuthenticationResponse> GetAuthorizationCode(AuthorizationGrantRequest request)
{
var url = request.Uri;
var data = new FormUrlEncodedContent(new[]
{
new KeyValuePair<string, string>("scope", "openid"),
new KeyValuePair<string, string>("response_type", "code"),
new KeyValuePair<string, string>("client_id", request.ClientId),
new KeyValuePair<string, string>("client_secret", request.ClientSecret),
new KeyValuePair<string, string>("prompt", "none"),
new KeyValuePair<string, string>("redirect_uri", request.RedirectUri),
new KeyValuePair<string, string>("username", request.Username),
new KeyValuePair<string, string>("password", request.Password),
});
var client = new HttpClient();
var response = await client.PostAsync(url, data);
var content = await response.Content.ReadAsStringAsync();
if (response.StatusCode != System.Net.HttpStatusCode.OK)
{
var error = JsonConvert
.DeserializeObject<AuthenticationErrorResponse>
(content);
throw new Exception(error.error + ": " + error.error_description);
}
else
{
return JsonConvert
.DeserializeObject<SuccessfulAuthenticationResponse>
(content);
}
}
private async Task<SuccessfulTokenResponse> GetTokenId(AuthorizationGrantRequest request, string code)
{
var client = new HttpClient();
var url = $"{request.Uri}token";
var data = new FormUrlEncodedContent(new[]
{
new KeyValuePair<string, string>("username", request.Username),
new KeyValuePair<string, string>("password", request.Password),
new KeyValuePair<string, string>("grant_type", "authorization_code"),
new KeyValuePair<string, string>("code", code),
new KeyValuePair<string, string>("redirect_uri", request.RedirectUri)
});
var response = await client.PostAsync(url, data);
var content = await response.Content.ReadAsStringAsync();
if (response.StatusCode != System.Net.HttpStatusCode.OK)
{
var error = JsonConvert
.DeserializeObject<AuthenticationErrorResponse>
(content);
throw new Exception(error.error + ": " + error.error_description);
}
else
{
return JsonConvert
.DeserializeObject<SuccessfulTokenResponse>
(content);
}
}
public async Task<SuccessfulTokenResponse> AuthorizationGrantAsync(AuthorizationGrantRequest request)
{
var authCode = await GetAuthorizationCode(request);
return await GetTokenId(request, authCode.Code);
}