package main import ( "flag" "fmt" "log" "os" "runtime" "strings" "time" "github.com/BurntSushi/toml" "github.com/mreiferson/go-options" ) func main() { log.SetFlags(log.Ldate | log.Ltime | log.Lshortfile) flagSet := flag.NewFlagSet("oauth2_proxy", flag.ExitOnError) emailDomains := StringArray{} whitelistDomains := StringArray{} upstreams := StringArray{} skipAuthRegex := StringArray{} googleGroups := StringArray{} config := flagSet.String("config", "", "path to config file") showVersion := flagSet.Bool("version", false, "print version string") flagSet.String("http-address", "127.0.0.1:4180", "[http://]: or unix:// to listen on for HTTP clients") flagSet.String("https-address", ":443", ": to listen on for HTTPS clients") flagSet.String("tls-cert", "", "path to certificate file") flagSet.String("tls-key", "", "path to private key file") flagSet.String("redirect-url", "", "the OAuth Redirect URL. ie: \"https://internalapp.yourcompany.com/oauth2/callback\"") flagSet.Bool("set-xauthrequest", false, "set X-Auth-Request-User and X-Auth-Request-Email response headers (useful in Nginx auth_request mode)") flagSet.Var(&upstreams, "upstream", "the http url(s) of the upstream endpoint or file:// paths for static files. Routing is based on the path") flagSet.Bool("pass-basic-auth", true, "pass HTTP Basic Auth, X-Forwarded-User and X-Forwarded-Email information to upstream") flagSet.Bool("pass-user-headers", true, "pass X-Forwarded-User and X-Forwarded-Email information to upstream") flagSet.String("basic-auth-password", "", "the password to set when passing the HTTP Basic Auth header") flagSet.Bool("pass-access-token", false, "pass OAuth access_token to upstream via X-Forwarded-Access-Token header") flagSet.Bool("pass-host-header", true, "pass the request Host Header to upstream") flagSet.Bool("pass-authorization-header", false, "pass the Authorization Header to upstream") flagSet.Bool("set-authorization-header", false, "set Authorization response headers (useful in Nginx auth_request mode)") flagSet.Var(&skipAuthRegex, "skip-auth-regex", "bypass authentication for requests path's that match (may be given multiple times)") flagSet.Bool("skip-provider-button", false, "will skip sign-in-page to directly reach the next step: oauth/start") flagSet.Bool("skip-auth-preflight", false, "will skip authentication for OPTIONS requests") flagSet.Bool("ssl-insecure-skip-verify", false, "skip validation of certificates presented when using HTTPS") flagSet.Var(&emailDomains, "email-domain", "authenticate emails with the specified domain (may be given multiple times). Use * to authenticate any email") flagSet.Var(&whitelistDomains, "whitelist-domain", "allowed domains for redirection after authentication") flagSet.String("azure-tenant", "common", "go to a tenant-specific or common (tenant-independent) endpoint.") flagSet.String("github-org", "", "restrict logins to members of this organisation") flagSet.String("github-team", "", "restrict logins to members of this team") flagSet.Var(&googleGroups, "google-group", "restrict logins to members of this google group (may be given multiple times).") flagSet.String("google-admin-email", "", "the google admin to impersonate for api calls") flagSet.String("google-service-account-json", "", "the path to the service account json credentials") flagSet.String("client-id", "", "the OAuth Client ID: ie: \"123456.apps.googleusercontent.com\"") flagSet.String("client-secret", "", "the OAuth Client Secret") flagSet.String("authenticated-emails-file", "", "authenticate against emails via file (one per line)") flagSet.String("htpasswd-file", "", "additionally authenticate against a htpasswd file. Entries must be created with \"htpasswd -s\" for SHA encryption") flagSet.Bool("display-htpasswd-form", true, "display username / password login form if an htpasswd file is provided") flagSet.String("custom-templates-dir", "", "path to custom html templates") flagSet.String("footer", "", "custom footer string. Use \"-\" to disable default footer.") flagSet.String("proxy-prefix", "/oauth2", "the url root path that this proxy should be nested under (e.g. //sign_in)") flagSet.String("cookie-name", "_oauth2_proxy", "the name of the cookie that the oauth_proxy creates") flagSet.String("cookie-secret", "", "the seed string for secure cookies (optionally base64 encoded)") flagSet.String("cookie-domain", "", "an optional cookie domain to force cookies to (ie: .yourcompany.com)*") flagSet.Duration("cookie-expire", time.Duration(168)*time.Hour, "expire timeframe for cookie") flagSet.Duration("cookie-refresh", time.Duration(0), "refresh the cookie after this duration; 0 to disable") flagSet.Bool("cookie-secure", true, "set secure (HTTPS) cookie flag") flagSet.Bool("cookie-httponly", true, "set HttpOnly cookie flag") flagSet.Bool("request-logging", true, "Log requests to stdout") flagSet.String("request-logging-format", defaultRequestLoggingFormat, "Template for log lines") flagSet.String("provider", "google", "OAuth provider") flagSet.String("oidc-issuer-url", "", "OpenID Connect issuer URL (ie: https://accounts.google.com)") flagSet.String("login-url", "", "Authentication endpoint") flagSet.String("redeem-url", "", "Token redemption endpoint") flagSet.String("profile-url", "", "Profile access endpoint") flagSet.String("resource", "", "The resource that is protected (Azure AD only)") flagSet.String("validate-url", "", "Access token validation endpoint") flagSet.String("scope", "", "OAuth scope specification") flagSet.String("approval-prompt", "force", "OAuth approval_prompt") flagSet.String("signature-key", "", "GAP-Signature request signature key (algorithm:secretkey)") flagSet.Parse(os.Args[1:]) if *showVersion { fmt.Printf("oauth2_proxy v%s (built with %s)\n", VERSION, runtime.Version()) return } opts := NewOptions() cfg := make(EnvOptions) if *config != "" { _, err := toml.DecodeFile(*config, &cfg) if err != nil { log.Fatalf("ERROR: failed to load config file %s - %s", *config, err) } } cfg.LoadEnvForStruct(opts) options.Resolve(opts, flagSet, cfg) err := opts.Validate() if err != nil { log.Printf("%s", err) os.Exit(1) } validator := NewValidator(opts.EmailDomains, opts.AuthenticatedEmailsFile) oauthproxy := NewOAuthProxy(opts, validator) if len(opts.EmailDomains) != 0 && opts.AuthenticatedEmailsFile == "" { if len(opts.EmailDomains) > 1 { oauthproxy.SignInMessage = fmt.Sprintf("Authenticate using one of the following domains: %v", strings.Join(opts.EmailDomains, ", ")) } else if opts.EmailDomains[0] != "*" { oauthproxy.SignInMessage = fmt.Sprintf("Authenticate using %v", opts.EmailDomains[0]) } } if opts.HtpasswdFile != "" { log.Printf("using htpasswd file %s", opts.HtpasswdFile) oauthproxy.HtpasswdFile, err = NewHtpasswdFromFile(opts.HtpasswdFile) oauthproxy.DisplayHtpasswdForm = opts.DisplayHtpasswdForm if err != nil { log.Fatalf("FATAL: unable to open %s %s", opts.HtpasswdFile, err) } } s := &Server{ Handler: LoggingHandler(os.Stdout, oauthproxy, opts.RequestLogging, opts.RequestLoggingFormat), Opts: opts, } s.ListenAndServe() }