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Move FlagSet to Options package

This commit is contained in:
Joel Speed 2020-04-13 14:20:04 +01:00
parent 1fd4ebe546
commit 189ed4de8f
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3 changed files with 136 additions and 120 deletions

121
main.go
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@ -14,134 +14,15 @@ import (
"github.com/oauth2-proxy/oauth2-proxy/pkg/apis/options"
"github.com/oauth2-proxy/oauth2-proxy/pkg/logger"
"github.com/oauth2-proxy/oauth2-proxy/pkg/validation"
"github.com/spf13/pflag"
)
func main() {
logger.SetFlags(logger.Lshortfile)
flagSet := pflag.NewFlagSet("oauth2-proxy", pflag.ExitOnError)
flagSet := options.NewFlagSet()
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://]<addr>:<port> or unix://<path> to listen on for HTTP clients")
flagSet.String("https-address", ":443", "<addr>:<port> 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.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.StringSlice("upstream", []string{}, "the http url(s) of the upstream endpoint, file:// paths for static files or static://<status_code> for static response. 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("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-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.StringSlice("skip-auth-regex", []string{}, "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.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.String("gitlab-group", "", "restrict logins to members of this group")
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. /<oauth2>/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.StringSlice("cookie-domain", []string{}, "Optional cookie domains to force cookies to (ie: `.yourcompany.com`). The longest domain matching the request's host will be used (or the shortest cookie domain if there is no match).")
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("cookie-samesite", "", "set SameSite cookie attribute (ie: \"lax\", \"strict\", \"none\", or \"\"). ")
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.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("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("provider-display-name", "", "Provider display name")
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.Parse(os.Args[1:])
if *showVersion {

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@ -295,6 +295,11 @@ var _ = Describe("Load", func() {
},
},
}),
Entry("with an empty Options struct, should return default values", &testOptionsTableInput{
flagSet: NewFlagSet,
input: &Options{},
expectedOutput: NewOptions(),
}),
)
})
})

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@ -11,6 +11,7 @@ import (
sessionsapi "github.com/oauth2-proxy/oauth2-proxy/pkg/apis/sessions"
"github.com/oauth2-proxy/oauth2-proxy/pkg/logger"
"github.com/oauth2-proxy/oauth2-proxy/providers"
"github.com/spf13/pflag"
)
// SignatureData holds hmacauth signature hash and key
@ -160,6 +161,7 @@ func (o *Options) SetRealClientIPParser(s logging.RealClientIPParser) { o.realCl
func NewOptions() *Options {
return &Options{
ProxyPrefix: "/oauth2",
ProviderType: "google",
PingPath: "/ping",
ProxyWebSockets: true,
HTTPAddress: "127.0.0.1:4180",
@ -173,12 +175,15 @@ func NewOptions() *Options {
HTTPOnly: true,
Expire: time.Duration(168) * time.Hour,
Refresh: time.Duration(0),
Path: "/",
},
Session: SessionOptions{
Type: "cookie",
},
AzureTenant: "common",
SetXAuthRequest: false,
SkipAuthPreflight: false,
FlushInterval: time.Duration(1) * time.Second,
PassBasicAuth: true,
SetBasicAuth: false,
PassUserHeaders: true,
@ -208,3 +213,128 @@ func NewOptions() *Options {
AuthLoggingFormat: logger.DefaultAuthLoggingFormat,
}
}
// 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://]<addr>:<port> or unix://<path> to listen on for HTTP clients")
flagSet.String("https-address", ":443", "<addr>:<port> 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.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.StringSlice("upstream", []string{}, "the http url(s) of the upstream endpoint, file:// paths for static files or static://<status_code> for static response. 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("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-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.StringSlice("skip-auth-regex", []string{}, "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.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.String("gitlab-group", "", "restrict logins to members of this group")
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. /<oauth2>/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.StringSlice("cookie-domain", []string{}, "Optional cookie domains to force cookies to (ie: `.yourcompany.com`). The longest domain matching the request's host will be used (or the shortest cookie domain if there is no match).")
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("cookie-samesite", "", "set SameSite cookie attribute (ie: \"lax\", \"strict\", \"none\", or \"\"). ")
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.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("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("provider-display-name", "", "Provider display name")
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")
return flagSet
}