package options import ( "crypto" "net/url" "regexp" oidc "github.com/coreos/go-oidc" ipapi "github.com/oauth2-proxy/oauth2-proxy/pkg/apis/ip" "github.com/oauth2-proxy/oauth2-proxy/providers" "github.com/spf13/pflag" ) // SignatureData holds hmacauth signature hash and key type SignatureData struct { Hash crypto.Hash Key string } // Options holds Configuration Options that can be set by Command Line Flag, // or Config File type Options struct { ProxyPrefix string `flag:"proxy-prefix" cfg:"proxy_prefix"` PingPath string `flag:"ping-path" cfg:"ping_path"` PingUserAgent string `flag:"ping-user-agent" cfg:"ping_user_agent"` HTTPAddress string `flag:"http-address" cfg:"http_address"` HTTPSAddress string `flag:"https-address" cfg:"https_address"` ReverseProxy bool `flag:"reverse-proxy" cfg:"reverse_proxy"` RealClientIPHeader string `flag:"real-client-ip-header" cfg:"real_client_ip_header"` TrustedIPs []string `flag:"trusted-ip" cfg:"trusted_ips"` ForceHTTPS bool `flag:"force-https" cfg:"force_https"` RawRedirectURL string `flag:"redirect-url" cfg:"redirect_url"` ClientID string `flag:"client-id" cfg:"client_id"` ClientSecret string `flag:"client-secret" cfg:"client_secret"` ClientSecretFile string `flag:"client-secret-file" cfg:"client_secret_file"` TLSCertFile string `flag:"tls-cert-file" cfg:"tls_cert_file"` TLSKeyFile string `flag:"tls-key-file" cfg:"tls_key_file"` AuthenticatedEmailsFile string `flag:"authenticated-emails-file" cfg:"authenticated_emails_file"` KeycloakGroup string `flag:"keycloak-group" cfg:"keycloak_group"` AzureTenant string `flag:"azure-tenant" cfg:"azure_tenant"` BitbucketTeam string `flag:"bitbucket-team" cfg:"bitbucket_team"` BitbucketRepository string `flag:"bitbucket-repository" cfg:"bitbucket_repository"` EmailDomains []string `flag:"email-domain" cfg:"email_domains"` WhitelistDomains []string `flag:"whitelist-domain" cfg:"whitelist_domains"` GitHubOrg string `flag:"github-org" cfg:"github_org"` GitHubTeam string `flag:"github-team" cfg:"github_team"` GitHubRepo string `flag:"github-repo" cfg:"github_repo"` GitHubToken string `flag:"github-token" cfg:"github_token"` GitHubUsers []string `flag:"github-user" cfg:"github_users"` GitLabGroup []string `flag:"gitlab-group" cfg:"gitlab_groups"` GoogleGroups []string `flag:"google-group" cfg:"google_group"` GoogleAdminEmail string `flag:"google-admin-email" cfg:"google_admin_email"` GoogleServiceAccountJSON string `flag:"google-service-account-json" cfg:"google_service_account_json"` HtpasswdFile string `flag:"htpasswd-file" cfg:"htpasswd_file"` DisplayHtpasswdForm bool `flag:"display-htpasswd-form" cfg:"display_htpasswd_form"` CustomTemplatesDir string `flag:"custom-templates-dir" cfg:"custom_templates_dir"` Banner string `flag:"banner" cfg:"banner"` Footer string `flag:"footer" cfg:"footer"` Cookie Cookie `cfg:",squash"` Session SessionOptions `cfg:",squash"` Logging Logging `cfg:",squash"` // Not used in the legacy config, name not allowed to match an external key (upstreams) // TODO(JoelSpeed): Rename when legacy config is removed UpstreamServers Upstreams `cfg:",internal"` SkipAuthRegex []string `flag:"skip-auth-regex" cfg:"skip_auth_regex"` SkipAuthStripHeaders bool `flag:"skip-auth-strip-headers" cfg:"skip_auth_strip_headers"` SkipJwtBearerTokens bool `flag:"skip-jwt-bearer-tokens" cfg:"skip_jwt_bearer_tokens"` ExtraJwtIssuers []string `flag:"extra-jwt-issuers" cfg:"extra_jwt_issuers"` PassBasicAuth bool `flag:"pass-basic-auth" cfg:"pass_basic_auth"` SetBasicAuth bool `flag:"set-basic-auth" cfg:"set_basic_auth"` PreferEmailToUser bool `flag:"prefer-email-to-user" cfg:"prefer_email_to_user"` BasicAuthPassword string `flag:"basic-auth-password" cfg:"basic_auth_password"` PassAccessToken bool `flag:"pass-access-token" cfg:"pass_access_token"` SkipProviderButton bool `flag:"skip-provider-button" cfg:"skip_provider_button"` PassUserHeaders bool `flag:"pass-user-headers" cfg:"pass_user_headers"` SSLInsecureSkipVerify bool `flag:"ssl-insecure-skip-verify" cfg:"ssl_insecure_skip_verify"` SetXAuthRequest bool `flag:"set-xauthrequest" cfg:"set_xauthrequest"` SetAuthorization bool `flag:"set-authorization-header" cfg:"set_authorization_header"` PassAuthorization bool `flag:"pass-authorization-header" cfg:"pass_authorization_header"` SkipAuthPreflight bool `flag:"skip-auth-preflight" cfg:"skip_auth_preflight"` // These options allow for other providers besides Google, with // potential overrides. ProviderType string `flag:"provider" cfg:"provider"` ProviderName string `flag:"provider-display-name" cfg:"provider_display_name"` ProviderCAFiles []string `flag:"provider-ca-file" cfg:"provider_ca_files"` OIDCIssuerURL string `flag:"oidc-issuer-url" cfg:"oidc_issuer_url"` InsecureOIDCAllowUnverifiedEmail bool `flag:"insecure-oidc-allow-unverified-email" cfg:"insecure_oidc_allow_unverified_email"` InsecureOIDCSkipIssuerVerification bool `flag:"insecure-oidc-skip-issuer-verification" cfg:"insecure_oidc_skip_issuer_verification"` SkipOIDCDiscovery bool `flag:"skip-oidc-discovery" cfg:"skip_oidc_discovery"` OIDCJwksURL string `flag:"oidc-jwks-url" cfg:"oidc_jwks_url"` LoginURL string `flag:"login-url" cfg:"login_url"` RedeemURL string `flag:"redeem-url" cfg:"redeem_url"` ProfileURL string `flag:"profile-url" cfg:"profile_url"` ProtectedResource string `flag:"resource" cfg:"resource"` ValidateURL string `flag:"validate-url" cfg:"validate_url"` Scope string `flag:"scope" cfg:"scope"` Prompt string `flag:"prompt" cfg:"prompt"` ApprovalPrompt string `flag:"approval-prompt" cfg:"approval_prompt"` // Deprecated by OIDC 1.0 UserIDClaim string `flag:"user-id-claim" cfg:"user_id_claim"` SignatureKey string `flag:"signature-key" cfg:"signature_key"` AcrValues string `flag:"acr-values" cfg:"acr_values"` JWTKey string `flag:"jwt-key" cfg:"jwt_key"` JWTKeyFile string `flag:"jwt-key-file" cfg:"jwt_key_file"` PubJWKURL string `flag:"pubjwk-url" cfg:"pubjwk_url"` GCPHealthChecks bool `flag:"gcp-healthchecks" cfg:"gcp_healthchecks"` // internal values that are set after config validation redirectURL *url.URL compiledRegex []*regexp.Regexp provider providers.Provider signatureData *SignatureData oidcVerifier *oidc.IDTokenVerifier jwtBearerVerifiers []*oidc.IDTokenVerifier realClientIPParser ipapi.RealClientIPParser } // Options for Getting internal values func (o *Options) GetRedirectURL() *url.URL { return o.redirectURL } func (o *Options) GetCompiledRegex() []*regexp.Regexp { return o.compiledRegex } func (o *Options) GetProvider() providers.Provider { return o.provider } func (o *Options) GetSignatureData() *SignatureData { return o.signatureData } func (o *Options) GetOIDCVerifier() *oidc.IDTokenVerifier { return o.oidcVerifier } func (o *Options) GetJWTBearerVerifiers() []*oidc.IDTokenVerifier { return o.jwtBearerVerifiers } func (o *Options) GetRealClientIPParser() ipapi.RealClientIPParser { return o.realClientIPParser } // Options for Setting internal values func (o *Options) SetRedirectURL(s *url.URL) { o.redirectURL = s } func (o *Options) SetCompiledRegex(s []*regexp.Regexp) { o.compiledRegex = s } func (o *Options) SetProvider(s providers.Provider) { o.provider = s } func (o *Options) SetSignatureData(s *SignatureData) { o.signatureData = s } func (o *Options) SetOIDCVerifier(s *oidc.IDTokenVerifier) { o.oidcVerifier = s } func (o *Options) SetJWTBearerVerifiers(s []*oidc.IDTokenVerifier) { o.jwtBearerVerifiers = s } func (o *Options) SetRealClientIPParser(s ipapi.RealClientIPParser) { o.realClientIPParser = s } // NewOptions constructs a new Options with defaulted values func NewOptions() *Options { return &Options{ ProxyPrefix: "/oauth2", ProviderType: "google", PingPath: "/ping", HTTPAddress: "127.0.0.1:4180", HTTPSAddress: ":443", RealClientIPHeader: "X-Real-IP", ForceHTTPS: false, DisplayHtpasswdForm: true, Cookie: cookieDefaults(), Session: sessionOptionsDefaults(), AzureTenant: "common", SetXAuthRequest: false, SkipAuthPreflight: false, PassBasicAuth: true, SetBasicAuth: false, PassUserHeaders: true, PassAccessToken: false, SetAuthorization: false, PassAuthorization: false, PreferEmailToUser: false, Prompt: "", // Change to "login" when ApprovalPrompt officially deprecated ApprovalPrompt: "force", UserIDClaim: "email", InsecureOIDCAllowUnverifiedEmail: false, SkipOIDCDiscovery: false, Logging: loggingDefaults(), } } // NewFlagSet creates a new FlagSet with all of the flags required by Options func NewFlagSet() *pflag.FlagSet { flagSet := pflag.NewFlagSet("oauth2-proxy", pflag.ExitOnError) 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.Bool("reverse-proxy", false, "are we running behind a reverse proxy, controls whether headers like X-Real-Ip are accepted") flagSet.String("real-client-ip-header", "X-Real-IP", "Header used to determine the real IP of the client (one of: X-Forwarded-For, X-Real-IP, or X-ProxyUser-IP)") flagSet.StringSlice("trusted-ip", []string{}, "list of IPs or CIDR ranges to allow to bypass authentication. WARNING: trusting by IP has inherent security flaws, read the configuration documentation for more information.") flagSet.Bool("force-https", false, "force HTTPS redirect for HTTP requests") 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.Bool("pass-basic-auth", true, "pass HTTP Basic Auth, X-Forwarded-User and X-Forwarded-Email information to upstream") flagSet.Bool("set-basic-auth", false, "set HTTP Basic Auth information in response (useful in Nginx auth_request mode)") flagSet.Bool("prefer-email-to-user", false, "Prefer to use the Email address as the Username when passing information to upstream. Will only use Username if Email is unavailable, eg. htaccess authentication. Used in conjunction with -pass-basic-auth and -pass-user-headers") 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-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.StringSlice("skip-auth-regex", []string{}, "bypass authentication for requests path's that match (may be given multiple times)") flagSet.Bool("skip-auth-strip-headers", false, "strips X-Forwarded-* style authentication headers & Authorization header if they would be set by oauth2-proxy for request paths in --skip-auth-regex") 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("skip-jwt-bearer-tokens", false, "will skip requests that have verified JWT bearer tokens (default false)") flagSet.StringSlice("extra-jwt-issuers", []string{}, "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.StringSlice("email-domain", []string{}, "authenticate emails with the specified domain (may be given multiple times). Use * to authenticate any email") flagSet.StringSlice("whitelist-domain", []string{}, "allowed domains for redirection after authentication. Prefix domain with a . to allow subdomains (eg .example.com)") flagSet.String("keycloak-group", "", "restrict login to members of this group.") 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("github-repo", "", "restrict logins to collaborators of this repository") flagSet.String("github-token", "", "the token to use when verifying repository collaborators (must have push access to the repository)") flagSet.StringSlice("github-user", []string{}, "allow users with these usernames to login even if they do not belong to the specified org and team or collaborators (may be given multiple times)") flagSet.StringSlice("gitlab-group", []string{}, "restrict logins to members of this group (may be given multiple times)") flagSet.StringSlice("google-group", []string{}, "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("client-secret-file", "", "the file with 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.String("ping-user-agent", "", "special User-Agent that will be used for basic health checks") flagSet.String("session-store-type", "cookie", "the session storage provider to use") flagSet.Bool("session-cookie-minimal", false, "strip OAuth tokens from cookie session stores if they aren't needed (cookie session store only)") flagSet.String("redis-connection-url", "", "URL of redis server for redis session storage (eg: redis://HOST[:PORT])") flagSet.String("redis-password", "", "Redis password. Applicable for all Redis configurations. Will override any password set in `--redis-connection-url`") 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-password", "", "Redis sentinel password. Used only for sentinel connection; any redis node passwords need to use `--redis-password`") flagSet.String("redis-sentinel-master-name", "", "Redis sentinel master name. Used in conjunction with --redis-use-sentinel") flagSet.String("redis-ca-path", "", "Redis custom CA path") flagSet.Bool("redis-insecure-skip-tls-verify", false, "Use insecure TLS connection to redis") flagSet.StringSlice("redis-sentinel-connection-urls", []string{}, "List of Redis sentinel connection URLs (eg redis://HOST[:PORT]). Used in conjunction with --redis-use-sentinel") flagSet.Bool("redis-use-cluster", false, "Connect to redis cluster. Must set --redis-cluster-connection-urls to use this feature") flagSet.StringSlice("redis-cluster-connection-urls", []string{}, "List of Redis cluster connection URLs (eg redis://HOST[:PORT]). Used in conjunction with --redis-use-cluster") flagSet.String("provider", "google", "OAuth provider") flagSet.String("provider-display-name", "", "Provider display name") flagSet.StringSlice("provider-ca-file", []string{}, "One or more paths to CA certificates that should be used when connecting to the provider. If not specified, the default Go trust sources are used instead.") 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("insecure-oidc-skip-issuer-verification", false, "Do not verify if issuer matches OIDC discovery URL") 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("prompt", "", "OIDC prompt") flagSet.String("approval-prompt", "force", "OAuth approval_prompt") flagSet.String("signature-key", "", "GAP-Signature request signature key (algorithm:secretkey)") flagSet.String("acr-values", "", "acr values string: optional") 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.String("user-id-claim", "email", "which claim contains the user ID") flagSet.AddFlagSet(cookieFlagSet()) flagSet.AddFlagSet(loggingFlagSet()) flagSet.AddFlagSet(legacyUpstreamsFlagSet()) return flagSet }