Exemplo n.º 1
0
        public async Task <TokenRequest> CreateTokenRequestAsync(IDictionary <string, string[]> requestParameters)
        {
            var(clientId, clientIdParameterError) = RequestParametersHelper.ValidateParameterIsUnique(requestParameters, OpenIdConnectParameterNames.ClientId, _errorProvider);
            if (clientIdParameterError != null)
            {
                return(TokenRequest.Invalid(clientIdParameterError));
            }

            if (!await _clientIdValidator.ValidateClientIdAsync(clientId))
            {
                return(TokenRequest.Invalid(_errorProvider.InvalidClientId(clientId)));
            }

            var(clientSecret, clientSecretParameterError) = RequestParametersHelper.ValidateOptionalParameterIsUnique(requestParameters, OpenIdConnectParameterNames.ClientSecret, _errorProvider);
            if (clientSecretParameterError != null)
            {
                return(TokenRequest.Invalid(clientSecretParameterError));
            }

            if (!await _clientIdValidator.ValidateClientCredentialsAsync(clientId, clientSecret))
            {
                return(TokenRequest.Invalid(_errorProvider.InvalidClientCredentials()));
            }

            var(grantType, grantTypeError) = RequestParametersHelper.ValidateParameterIsUnique(
                requestParameters,
                OpenIdConnectParameterNames.GrantType,
                _errorProvider);

            if (grantTypeError != null)
            {
                return(TokenRequest.Invalid(grantTypeError));
            }

            var grantTypeParameter = GetGrantTypeParameter(requestParameters, grantType);

            if (grantTypeParameter == null)
            {
                return(TokenRequest.Invalid(_errorProvider.InvalidGrantType(grantType)));
            }

            var(grantValue, grantValueError) = RequestParametersHelper.ValidateParameterIsUnique(
                requestParameters,
                grantTypeParameter,
                _errorProvider);

            if (grantValueError != null)
            {
                return(TokenRequest.Invalid(clientIdParameterError));
            }

            var message = new OpenIdConnectMessage(requestParameters)
            {
                RequestType = OpenIdConnectRequestType.Token
            };

            // TODO: File a bug to track we might want to redesign this if we want to consider other flows like
            // client credentials or resource owner credentials.
            var consentGrant = await _tokenManager.ExchangeTokenAsync(message);

            if (!consentGrant.IsValid)
            {
                return(TokenRequest.Invalid(consentGrant.Error));
            }

            if (!_timeStampManager.IsValidPeriod(consentGrant.Token.NotBefore, consentGrant.Token.Expires))
            {
                return(TokenRequest.Invalid(_errorProvider.InvalidLifetime()));
            }

            if (!string.Equals(clientId, consentGrant.ClientId, StringComparison.Ordinal))
            {
                return(TokenRequest.Invalid(_errorProvider.InvalidGrant()));
            }

            var(scope, requestScopesError) = RequestParametersHelper.ValidateOptionalParameterIsUnique(requestParameters, OpenIdConnectParameterNames.Scope, _errorProvider);
            if (requestScopesError != null)
            {
                return(TokenRequest.Invalid(requestScopesError));
            }

            var grantedScopes = consentGrant.GrantedScopes;

            var parsedScope = scope?.Split(new[] { ' ' }, StringSplitOptions.RemoveEmptyEntries);

            if (parsedScope != null)
            {
                var scopeResolutionResult = await _scopeResolver.ResolveScopesAsync(clientId, parsedScope);

                if (!scopeResolutionResult.IsValid)
                {
                    return(TokenRequest.Invalid(scopeResolutionResult.Error));
                }

                if (grantType.Equals(OpenIdConnectGrantTypes.AuthorizationCode, StringComparison.Ordinal) ||
                    grantType.Equals(OpenIdConnectGrantTypes.RefreshToken, StringComparison.Ordinal))
                {
                    if (scopeResolutionResult.Scopes.Any(rs => !consentGrant.GrantedScopes.Contains(rs)))
                    {
                        return(TokenRequest.Invalid(_errorProvider.UnauthorizedScope()));
                    }
                }

                grantedScopes = scopeResolutionResult.Scopes;
            }

            if (grantType.Equals(OpenIdConnectGrantTypes.AuthorizationCode, StringComparison.Ordinal))
            {
                var authorizationCodeError = await ValidateAuthorizationCode(
                    requestParameters,
                    clientId,
                    consentGrant);

                if (authorizationCodeError != null)
                {
                    return(TokenRequest.Invalid(authorizationCodeError));
                }
            }

            var requestGrants = new RequestGrants
            {
                Tokens = consentGrant.GrantedTokens.ToList(),
                Claims = consentGrant.Token.ToList(),
                Scopes = grantedScopes.ToList()
            };

            return(await ValidateRequestAsync(TokenRequest.Valid(
                                                  message,
                                                  consentGrant.UserId,
                                                  consentGrant.ClientId,
                                                  requestGrants)));
        }