package main import ( "flag" "fmt" "math/rand" "net/http" "os" "runtime" "strings" "time" "github.com/BurntSushi/toml" options "github.com/mreiferson/go-options" "github.com/pusher/oauth2_proxy/pkg/logger" ) func main() { logger.SetFlags(logger.Lshortfile) flagSet := flag.NewFlagSet("oauth2_proxy", flag.ExitOnError) emailDomains := StringArray{} whitelistDomains := StringArray{} upstreams := StringArray{} skipAuthRegex := StringArray{} jwtIssuers := StringArray{} googleGroups := StringArray{} redisSentinelConnectionURLs := StringArray{} config := flagSet.String("config", "", "path to config file (Note when using config file, options are plural and s/-/_/: email-domain becomes email_domains and is a list)") 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-file", "", "path to certificate file") flagSet.String("tls-key-file", "", "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 providers") flagSet.Bool("ssl-upstream-insecure-skip-verify", false, "skip validation of certificates presented when using HTTPS upstreams") flagSet.Duration("flush-interval", time.Duration(1)*time.Second, "period between response flushing when streaming responses") flagSet.Bool("skip-jwt-bearer-tokens", false, "will skip requests that have verified JWT bearer tokens (default false)") flagSet.Var(&jwtIssuers, "extra-jwt-issuers", "if skip-jwt-bearer-tokens is set, a list of extra JWT issuer=audience pairs (where the issuer URL has a .well-known/openid-configuration or a .well-known/jwks.json)") 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. Prefix domain with a . to allow subdomains (eg .example.com)") flagSet.String("azure-tenant", "common", "go to a tenant-specific or common (tenant-independent) endpoint.") flagSet.String("bitbucket-team", "", "restrict logins to members of this team") flagSet.String("bitbucket-repository", "", "restrict logins to user with access to this repository") flagSet.String("github-org", "", "restrict logins to members of this organisation") flagSet.String("github-team", "", "restrict logins to members of this team") flagSet.String("gitlab-group", "", "restrict logins to members of this group") 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 or \"htpasswd -B\" for bcrypt 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("banner", "", "custom banner string. Use \"-\" to disable default banner.") 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("ping-path", "/ping", "the ping endpoint that can be used for basic health checks") flagSet.Bool("proxy-websockets", true, "enables WebSocket proxying") 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.String("cookie-path", "/", "an optional cookie path to force cookies to (ie: /poc/)*") 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.String("session-store-type", "cookie", "the session storage provider to use") flagSet.String("redis-connection-url", "", "URL of redis server for redis session storage (eg: redis://HOST[:PORT])") flagSet.Bool("redis-use-sentinel", false, "Connect to redis via sentinels. Must set --redis-sentinel-master-name and --redis-sentinel-connection-urls to use this feature") flagSet.String("redis-sentinel-master-name", "", "Redis sentinel master name. Used in conjunction with --redis-use-sentinel") flagSet.Var(&redisSentinelConnectionURLs, "redis-sentinel-connection-urls", "List of Redis sentinel connection URLs (eg redis://HOST[:PORT]). Used in conjunction with --redis-use-sentinel") flagSet.String("logging-filename", "", "File to log requests to, empty for stdout") flagSet.Int("logging-max-size", 100, "Maximum size in megabytes of the log file before rotation") flagSet.Int("logging-max-age", 7, "Maximum number of days to retain old log files") flagSet.Int("logging-max-backups", 0, "Maximum number of old log files to retain; 0 to disable") flagSet.Bool("logging-local-time", true, "If the time in log files and backup filenames are local or UTC time") flagSet.Bool("logging-compress", false, "Should rotated log files be compressed using gzip") flagSet.Bool("standard-logging", true, "Log standard runtime information") flagSet.String("standard-logging-format", logger.DefaultStandardLoggingFormat, "Template for standard log lines") flagSet.Bool("request-logging", true, "Log HTTP requests") flagSet.String("request-logging-format", logger.DefaultRequestLoggingFormat, "Template for HTTP request log lines") flagSet.String("exclude-logging-paths", "", "Exclude logging requests to paths (eg: '/path1,/path2,/path3')") flagSet.Bool("silence-ping-logging", false, "Disable logging of requests to ping endpoint") flagSet.Bool("auth-logging", true, "Log authentication attempts") flagSet.String("auth-logging-format", logger.DefaultAuthLoggingFormat, "Template for authentication log lines") flagSet.String("provider", "google", "OAuth provider") flagSet.String("oidc-issuer-url", "", "OpenID Connect issuer URL (ie: https://accounts.google.com)") flagSet.Bool("insecure-oidc-allow-unverified-email", false, "Don't fail if an email address in an id_token is not verified") flagSet.Bool("skip-oidc-discovery", false, "Skip OIDC discovery and use manually supplied Endpoints") flagSet.String("oidc-jwks-url", "", "OpenID Connect JWKS URL (ie: https://www.googleapis.com/oauth2/v3/certs)") 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.String("acr-values", "http://idmanagement.gov/ns/assurance/loa/1", "acr values string: optional, used by login.gov") flagSet.String("jwt-key", "", "private key in PEM format used to sign JWT, so that you can say something like -jwt-key=\"${OAUTH2_PROXY_JWT_KEY}\": required by login.gov") flagSet.String("jwt-key-file", "", "path to the private key file in PEM format used to sign the JWT so that you can say something like -jwt-key-file=/etc/ssl/private/jwt_signing_key.pem: required by login.gov") flagSet.String("pubjwk-url", "", "JWK pubkey access endpoint: required by login.gov") flagSet.Bool("gcp-healthchecks", false, "Enable GCP/GKE healthcheck endpoints") flagSet.Parse(os.Args[1:]) if *showVersion { fmt.Printf("oauth2_proxy %s (built with %s)\n", VERSION, runtime.Version()) return } opts := NewOptions() cfg := make(EnvOptions) if *config != "" { _, err := toml.DecodeFile(*config, &cfg) if err != nil { logger.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 { logger.Printf("%s", err) os.Exit(1) } validator := NewValidator(opts.EmailDomains, opts.AuthenticatedEmailsFile) oauthproxy := NewOAuthProxy(opts, validator) if len(opts.Banner) >= 1 { if opts.Banner == "-" { oauthproxy.SignInMessage = "" } else { oauthproxy.SignInMessage = opts.Banner } } else 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 != "" { logger.Printf("using htpasswd file %s", opts.HtpasswdFile) oauthproxy.HtpasswdFile, err = NewHtpasswdFromFile(opts.HtpasswdFile) oauthproxy.DisplayHtpasswdForm = opts.DisplayHtpasswdForm if err != nil { logger.Fatalf("FATAL: unable to open %s %s", opts.HtpasswdFile, err) } } rand.Seed(time.Now().UnixNano()) var handler http.Handler if opts.GCPHealthChecks { handler = gcpHealthcheck(LoggingHandler(oauthproxy)) } else { handler = LoggingHandler(oauthproxy) } s := &Server{ Handler: handler, Opts: opts, } s.ListenAndServe() }