oauth2_proxy/main.go
2019-06-15 11:33:58 +02:00

179 lines
10 KiB
Go

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{}
googleGroups := StringArray{}
redisSentinelConnectionURLs := 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://]<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.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.Duration("flush-interval", time.Duration(1)*time.Second, "period between response flushing when streaming responses")
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("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 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("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.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 conjuction with --redis-use-sentinel")
flagSet.Var(&redisSentinelConnectionURLs, "redis-sentinel-connection-urls", "List of Redis sentinel connection URLs (eg redis://HOST[:PORT]). Used in conjuction 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.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("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.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()
}