zeroshade commented on code in PR #2651: URL: https://github.com/apache/arrow-adbc/pull/2651#discussion_r2047412891
########## go/adbc/driver/flightsql/flightsql_oauth.go: ########## @@ -0,0 +1,149 @@ +// Licensed to the Apache Software Foundation (ASF) under one +// or more contributor license agreements. See the NOTICE file +// distributed with this work for additional information +// regarding copyright ownership. The ASF licenses this file +// to you under the Apache License, Version 2.0 (the +// "License"); you may not use this file except in compliance +// with the License. You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, +// software distributed under the License is distributed on an +// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY +// KIND, either express or implied. See the License for the +// specific language governing permissions and limitations +// under the License. + +package flightsql + +import ( + "context" + "fmt" + + "golang.org/x/oauth2" + "google.golang.org/grpc/credentials" + "google.golang.org/grpc/credentials/oauth" +) + +const ( + ClientCredentials = "client_credentials" + TokenExchange = "token_exchange" +) + +type oAuthOption struct { + isRequired bool + oAuthKey string +} + +var ( + clientCredentialsParams = map[string]oAuthOption{ + OptionKeyClientId: {true, "client_id"}, + OptionKeyClientSecret: {true, "client_secret"}, + OptionKeyTokenURI: {true, "token_uri"}, + OptionKeyScope: {false, "scope"}, + } + + tokenExchangParams = map[string]oAuthOption{ + OptionKeySubjectToken: {true, "subject_token"}, + OptionKeySubjectTokenType: {true, "subject_token_type"}, + OptionKeyReqTokenType: {false, "requested_token_type"}, + OptionKeyExchangeAud: {false, "audience"}, + OptionKeyExchangeResource: {false, "resource"}, + OptionKeyExchangeScope: {false, "scope"}, + } +) + +func parseOAuthOptions(options map[string]string, paramMap map[string]oAuthOption, flowName string) (map[string]string, error) { + params := map[string]string{} + + for key, param := range paramMap { + if value, ok := options[key]; ok { + params[key] = value + delete(options, key) + } else if param.isRequired { + return nil, fmt.Errorf("%s grant requires %s", flowName, key) + } + } + + return params, nil +} + +func exchangeToken(conf *oauth2.Config, codeOptions []oauth2.AuthCodeOption) (credentials.PerRPCCredentials, error) { + ctx := context.Background() + tok, err := conf.Exchange(ctx, "", codeOptions...) + if err != nil { + return nil, err + } + return &oauth.TokenSource{TokenSource: conf.TokenSource(ctx, tok)}, nil +} + +func newClientCredentials(options map[string]string) (credentials.PerRPCCredentials, error) { + codeOptions := []oauth2.AuthCodeOption{ + oauth2.SetAuthURLParam("grant_type", "client_credentials"), + } + + params, err := parseOAuthOptions(options, clientCredentialsParams, "client credentials") + if err != nil { + return nil, err + } + + conf := &oauth2.Config{ + ClientID: params[OptionKeyClientId], + ClientSecret: params[OptionKeyClientSecret], + Endpoint: oauth2.Endpoint{ + TokenURL: params[OptionKeyTokenURI], + }, + } + + if scopes, ok := params[OptionKeyScope]; ok { + conf.Scopes = []string{scopes} + } + + return exchangeToken(conf, codeOptions) +} + +func newTokenExchangeFlow(options map[string]string) (credentials.PerRPCCredentials, error) { + tokenURI, ok := options[OptionKeyTokenURI] + if !ok { + return nil, fmt.Errorf("token exchange grant requires %s", OptionKeyTokenURI) + } + delete(options, OptionKeyTokenURI) + + conf := &oauth2.Config{ + Endpoint: oauth2.Endpoint{ + TokenURL: tokenURI, + }, + } + + codeOptions := []oauth2.AuthCodeOption{ + oauth2.SetAuthURLParam("grant_type", "urn:ietf:params:oauth:grant-type:token-exchange"), Review Comment: can we add a comment for the constant so we reference that and where it comes from? -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: github-unsubscr...@arrow.apache.org For queries about this service, please contact Infrastructure at: us...@infra.apache.org
