/
oauth_authorization.go
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/
oauth_authorization.go
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// Copyright (c) 2017-2021 Uber Technologies Inc.
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.
package internal
import (
"context"
"fmt"
"net/url"
"go.uber.org/cadence/internal/common/auth"
"golang.org/x/oauth2"
"golang.org/x/oauth2/clientcredentials"
)
// OAuthAuthorizerConfig allows to configure external OAuth provider
// This is machine to machine / service to service 2-legged OAuth2 flow
type OAuthAuthorizerConfig struct {
// ClientID to be used for acquiring token
ClientID string `yaml:"clientID"`
// ClientSecret to be used for acquiring token
ClientSecret string `yaml:"clientSecret"`
// TokenURL is the endpoint used to get token from provider
TokenURL string `yaml:"tokenURL"`
// Scope specifies optional requested permissions
Scopes []string `yaml:"scopes"`
// EndpointParams specifies additional parameters for requests to the token endpoint.
// This needs to be provided for some OAuth providers
EndpointParams map[string]string `yaml:"endpointParams"`
}
var _ auth.AuthorizationProvider = (*OAuthProvider)(nil)
type OAuthProvider struct {
tokenSource oauth2.TokenSource
config clientcredentials.Config
}
func NewOAuthAuthorizationProvider(config OAuthAuthorizerConfig) *OAuthProvider {
oauthConfig := clientcredentials.Config{
ClientID: config.ClientID,
ClientSecret: config.ClientSecret,
TokenURL: config.TokenURL,
Scopes: config.Scopes,
}
if config.EndpointParams != nil {
v := url.Values{}
for name, value := range config.EndpointParams {
v.Set(name, value)
}
oauthConfig.EndpointParams = v
}
return &OAuthProvider{
tokenSource: oauthConfig.TokenSource(context.Background()),
config: oauthConfig,
}
}
func (o *OAuthProvider) GetAuthToken() ([]byte, error) {
token, err := o.tokenSource.Token()
if err != nil {
return nil, fmt.Errorf("token source: %w", err)
}
return []byte(token.AccessToken), nil
}