golang.org/x/oauth2@v0.18.0/google/internal/stsexchange/clientauth.go (about)

     1  // Copyright 2020 The Go Authors. All rights reserved.
     2  // Use of this source code is governed by a BSD-style
     3  // license that can be found in the LICENSE file.
     4  
     5  package stsexchange
     6  
     7  import (
     8  	"encoding/base64"
     9  	"net/http"
    10  	"net/url"
    11  
    12  	"golang.org/x/oauth2"
    13  )
    14  
    15  // ClientAuthentication represents an OAuth client ID and secret and the mechanism for passing these credentials as stated in rfc6749#2.3.1.
    16  type ClientAuthentication struct {
    17  	// AuthStyle can be either basic or request-body
    18  	AuthStyle    oauth2.AuthStyle
    19  	ClientID     string
    20  	ClientSecret string
    21  }
    22  
    23  // InjectAuthentication is used to add authentication to a Secure Token Service exchange
    24  // request.  It modifies either the passed url.Values or http.Header depending on the desired
    25  // authentication format.
    26  func (c *ClientAuthentication) InjectAuthentication(values url.Values, headers http.Header) {
    27  	if c.ClientID == "" || c.ClientSecret == "" || values == nil || headers == nil {
    28  		return
    29  	}
    30  
    31  	switch c.AuthStyle {
    32  	case oauth2.AuthStyleInHeader: // AuthStyleInHeader corresponds to basic authentication as defined in rfc7617#2
    33  		plainHeader := c.ClientID + ":" + c.ClientSecret
    34  		headers.Add("Authorization", "Basic "+base64.StdEncoding.EncodeToString([]byte(plainHeader)))
    35  	case oauth2.AuthStyleInParams: // AuthStyleInParams corresponds to request-body authentication with ClientID and ClientSecret in the message body.
    36  		values.Set("client_id", c.ClientID)
    37  		values.Set("client_secret", c.ClientSecret)
    38  	case oauth2.AuthStyleAutoDetect:
    39  		values.Set("client_id", c.ClientID)
    40  		values.Set("client_secret", c.ClientSecret)
    41  	default:
    42  		values.Set("client_id", c.ClientID)
    43  		values.Set("client_secret", c.ClientSecret)
    44  	}
    45  }