102 lines
3.6 KiB
Go
102 lines
3.6 KiB
Go
package main
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import (
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"flag"
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"fmt"
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"log"
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"net"
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"net/http"
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"os"
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"strings"
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"time"
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"github.com/BurntSushi/toml"
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"github.com/mreiferson/go-options"
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)
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func main() {
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flagSet := flag.NewFlagSet("google_auth_proxy", flag.ExitOnError)
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googleAppsDomains := StringArray{}
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upstreams := StringArray{}
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config := flagSet.String("config", "", "path to config file")
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showVersion := flagSet.Bool("version", false, "print version string")
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flagSet.String("http-address", "127.0.0.1:4180", "<addr>:<port> to listen on for HTTP clients")
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flagSet.String("redirect-url", "", "the OAuth Redirect URL. ie: \"https://internalapp.yourcompany.com/oauth2/callback\"")
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flagSet.Var(&upstreams, "upstream", "the http url(s) of the upstream endpoint. If multiple, routing is based on path")
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flagSet.Bool("pass-basic-auth", true, "pass HTTP Basic Auth, X-Forwarded-User and X-Forwarded-Email information to upstream")
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flagSet.Var(&googleAppsDomains, "google-apps-domain", "authenticate against the given Google apps domain (may be given multiple times)")
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flagSet.String("client-id", "", "the Google OAuth Client ID: ie: \"123456.apps.googleusercontent.com\"")
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flagSet.String("client-secret", "", "the OAuth Client Secret")
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flagSet.String("authenticated-emails-file", "", "authenticate against emails via file (one per line)")
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flagSet.String("htpasswd-file", "", "additionally authenticate against a htpasswd file. Entries must be created with \"htpasswd -s\" for SHA encryption")
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flagSet.Bool("display-htpasswd-form", true, "display username / password login form if an htpasswd file is provided")
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flagSet.String("cookie-secret", "", "the seed string for secure cookies")
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flagSet.String("cookie-domain", "", "an optional cookie domain to force cookies to (ie: .yourcompany.com)*")
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flagSet.Duration("cookie-expire", time.Duration(168)*time.Hour, "expire timeframe for cookie")
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flagSet.Bool("cookie-https-only", true, "set HTTPS only cookie")
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flagSet.Parse(os.Args[1:])
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if *showVersion {
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fmt.Printf("google_auth_proxy v%s\n", VERSION)
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return
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}
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opts := NewOptions()
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cfg := make(EnvOptions)
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if *config != "" {
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_, err := toml.DecodeFile(*config, &cfg)
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if err != nil {
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log.Fatalf("ERROR: failed to load config file %s - %s", *config, err)
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}
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}
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cfg.LoadEnvForStruct(opts)
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options.Resolve(opts, flagSet, cfg)
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err := opts.Validate()
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if err != nil {
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log.Printf("%s", err)
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os.Exit(1)
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}
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validator := NewValidator(opts.GoogleAppsDomains, opts.AuthenticatedEmailsFile)
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oauthproxy := NewOauthProxy(opts, validator)
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if len(opts.GoogleAppsDomains) != 0 && opts.AuthenticatedEmailsFile == "" {
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if len(opts.GoogleAppsDomains) > 1 {
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oauthproxy.SignInMessage = fmt.Sprintf("Authenticate using one of the following domains: %v", strings.Join(opts.GoogleAppsDomains, ", "))
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} else {
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oauthproxy.SignInMessage = fmt.Sprintf("Authenticate using %v", opts.GoogleAppsDomains[0])
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}
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}
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if opts.HtpasswdFile != "" {
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log.Printf("using htpasswd file %s", opts.HtpasswdFile)
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oauthproxy.HtpasswdFile, err = NewHtpasswdFromFile(opts.HtpasswdFile)
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oauthproxy.DisplayHtpasswdForm = opts.DisplayHtpasswdForm
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if err != nil {
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log.Fatalf("FATAL: unable to open %s %s", opts.HtpasswdFile, err)
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}
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}
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listener, err := net.Listen("tcp", opts.HttpAddress)
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if err != nil {
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log.Fatalf("FATAL: listen (%s) failed - %s", opts.HttpAddress, err)
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}
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log.Printf("listening on %s", opts.HttpAddress)
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server := &http.Server{Handler: oauthproxy}
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err = server.Serve(listener)
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if err != nil && !strings.Contains(err.Error(), "use of closed network connection") {
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log.Printf("ERROR: http.Serve() - %s", err)
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}
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log.Printf("HTTP: closing %s", listener.Addr())
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}
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