Adding upstream version 1.34.4.

Signed-off-by: Daniel Baumann <daniel@debian.org>

plugins/common/oauth/config.go

@@ -0,0 +1,42 @@
+package oauth
+
+import (
+	"context"
+	"net/http"
+	"net/url"
+
+	"golang.org/x/oauth2"
+	"golang.org/x/oauth2/clientcredentials"
+)
+
+type OAuth2Config struct {
+	// OAuth2 Credentials
+	ClientID     string   `toml:"client_id"`
+	ClientSecret string   `toml:"client_secret"`
+	TokenURL     string   `toml:"token_url"`
+	Audience     string   `toml:"audience"`
+	Scopes       []string `toml:"scopes"`
+}
+
+func (o *OAuth2Config) CreateOauth2Client(ctx context.Context, client *http.Client) *http.Client {
+	if o.ClientID == "" || o.ClientSecret == "" || o.TokenURL == "" {
+		return client
+	}
+
+	oauthConfig := clientcredentials.Config{
+		ClientID:       o.ClientID,
+		ClientSecret:   o.ClientSecret,
+		TokenURL:       o.TokenURL,
+		Scopes:         o.Scopes,
+		EndpointParams: make(url.Values),
+	}
+
+	if o.Audience != "" {
+		oauthConfig.EndpointParams.Add("audience", o.Audience)
+	}
+
+	ctx = context.WithValue(ctx, oauth2.HTTPClient, client)
+	client = oauthConfig.Client(ctx)
+
+	return client
+}