public override async Task <AuthorizationFlowCredential> OnGetToken(string code, string redirectUri, string state)
{
var googleOptions = AuthenticationOptions.Get(this.SchemeName);
try
{
var requestId = $"GoogleAuthorizationFlow-{Guid.NewGuid()}";
var authorizationCodeFlow = new GoogleAuthorizationCodeFlow(new GoogleAuthorizationCodeFlow.Initializer()
{
ClientSecrets = new ClientSecrets()
{
ClientId = googleOptions.ClientId,
ClientSecret = googleOptions.ClientSecret,
},
IncludeGrantedScopes = true,
});
var tokenResponse = await authorizationCodeFlow.ExchangeCodeForTokenAsync(
requestId,
code,
redirectUri,
CancellationToken.None);
var payload = await GoogleJsonWebSignature.ValidateAsync(tokenResponse.IdToken);
return(new AuthorizationFlowCredential
{
UserId = payload.Subject,
Email = payload.Email,
DisplayName = payload.Name,
GivenName = payload.GivenName,
FamilyName = payload.FamilyName,
TokenType = tokenResponse.TokenType,
IdToken = tokenResponse.IdToken,
AccessToken = tokenResponse.AccessToken,
RefreshToken = tokenResponse.RefreshToken,
IssuedUtc = tokenResponse.IssuedUtc,
ExpiresInSeconds = tokenResponse.ExpiresInSeconds,
Scope = tokenResponse.Scope,
});
}
catch (TokenResponseException ex)
{
Logger.LogError(ex, ex.Message);
throw new AuthorizationFlowException(ex.Error.Error, ex.Error.ErrorDescription, ex.Error.ErrorUri);
}
catch (Exception ex)
{
Logger.LogError(ex, ex.Message);
throw;
}
}
public override void OnAuthorization(
string response_type, string scopes, string redirectUri, string state)
{
var microsoftOptions = AuthenticationOptions.Get(this.SchemeName);
var scopes_definitive = string.Join(" ",
(scopes?.Trim().Split(" ") ?? microsoftOptions.Scope)
.Union(new string[] { "openid", "offline_access" })
.Distinct());
var authorizeUrl = $"{microsoftOptions.AuthorizationEndpoint}" +
$"?client_id={microsoftOptions.ClientId}" +
$"&response_type={response_type}" +
$"&redirect_uri={Uri.EscapeDataString(redirectUri)}" +
$"&response_mode=query" +
$"&scope={Uri.EscapeDataString(scopes_definitive)}" +
$"{(state == null ? "" : $"&state={state}")}";