626 lines
26 KiB
Go
626 lines
26 KiB
Go
package main
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import (
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"context"
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"crypto"
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"crypto/tls"
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"encoding/base64"
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"fmt"
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"io/ioutil"
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"net/http"
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"net/url"
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"os"
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"regexp"
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"strings"
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"time"
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oidc "github.com/coreos/go-oidc"
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"github.com/dgrijalva/jwt-go"
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"github.com/mbland/hmacauth"
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"github.com/pusher/oauth2_proxy/pkg/apis/options"
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sessionsapi "github.com/pusher/oauth2_proxy/pkg/apis/sessions"
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"github.com/pusher/oauth2_proxy/pkg/encryption"
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"github.com/pusher/oauth2_proxy/pkg/logger"
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"github.com/pusher/oauth2_proxy/pkg/sessions"
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"github.com/pusher/oauth2_proxy/providers"
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"gopkg.in/natefinch/lumberjack.v2"
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)
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// Options holds Configuration Options that can be set by Command Line Flag,
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// or Config File
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type Options struct {
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ProxyPrefix string `flag:"proxy-prefix" cfg:"proxy_prefix" env:"OAUTH2_PROXY_PROXY_PREFIX"`
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PingPath string `flag:"ping-path" cfg:"ping_path" env:"OAUTH2_PROXY_PING_PATH"`
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ProxyWebSockets bool `flag:"proxy-websockets" cfg:"proxy_websockets" env:"OAUTH2_PROXY_PROXY_WEBSOCKETS"`
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HTTPAddress string `flag:"http-address" cfg:"http_address" env:"OAUTH2_PROXY_HTTP_ADDRESS"`
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HTTPSAddress string `flag:"https-address" cfg:"https_address" env:"OAUTH2_PROXY_HTTPS_ADDRESS"`
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RedirectURL string `flag:"redirect-url" cfg:"redirect_url" env:"OAUTH2_PROXY_REDIRECT_URL"`
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ClientID string `flag:"client-id" cfg:"client_id" env:"OAUTH2_PROXY_CLIENT_ID"`
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ClientSecret string `flag:"client-secret" cfg:"client_secret" env:"OAUTH2_PROXY_CLIENT_SECRET"`
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TLSCertFile string `flag:"tls-cert-file" cfg:"tls_cert_file" env:"OAUTH2_PROXY_TLS_CERT_FILE"`
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TLSKeyFile string `flag:"tls-key-file" cfg:"tls_key_file" env:"OAUTH2_PROXY_TLS_KEY_FILE"`
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AuthenticatedEmailsFile string `flag:"authenticated-emails-file" cfg:"authenticated_emails_file" env:"OAUTH2_PROXY_AUTHENTICATED_EMAILS_FILE"`
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KeycloakGroup string `flag:"keycloak-group" cfg:"keycloak_group" env:"OAUTH2_PROXY_KEYCLOAK_GROUP"`
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AzureTenant string `flag:"azure-tenant" cfg:"azure_tenant" env:"OAUTH2_PROXY_AZURE_TENANT"`
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BitbucketTeam string `flag:"bitbucket-team" cfg:"bitbucket_team" env:"OAUTH2_PROXY_BITBUCKET_TEAM"`
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BitbucketRepository string `flag:"bitbucket-repository" cfg:"bitbucket_repository" env:"OAUTH2_PROXY_BITBUCKET_REPOSITORY"`
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EmailDomains []string `flag:"email-domain" cfg:"email_domains" env:"OAUTH2_PROXY_EMAIL_DOMAINS"`
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WhitelistDomains []string `flag:"whitelist-domain" cfg:"whitelist_domains" env:"OAUTH2_PROXY_WHITELIST_DOMAINS"`
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GitHubOrg string `flag:"github-org" cfg:"github_org" env:"OAUTH2_PROXY_GITHUB_ORG"`
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GitHubTeam string `flag:"github-team" cfg:"github_team" env:"OAUTH2_PROXY_GITHUB_TEAM"`
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GitLabGroup string `flag:"gitlab-group" cfg:"gitlab_group" env:"OAUTH2_PROXY_GITLAB_GROUP"`
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GoogleGroups []string `flag:"google-group" cfg:"google_group" env:"OAUTH2_PROXY_GOOGLE_GROUPS"`
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GoogleAdminEmail string `flag:"google-admin-email" cfg:"google_admin_email" env:"OAUTH2_PROXY_GOOGLE_ADMIN_EMAIL"`
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GoogleServiceAccountJSON string `flag:"google-service-account-json" cfg:"google_service_account_json" env:"OAUTH2_PROXY_GOOGLE_SERVICE_ACCOUNT_JSON"`
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HtpasswdFile string `flag:"htpasswd-file" cfg:"htpasswd_file" env:"OAUTH2_PROXY_HTPASSWD_FILE"`
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DisplayHtpasswdForm bool `flag:"display-htpasswd-form" cfg:"display_htpasswd_form" env:"OAUTH2_PROXY_DISPLAY_HTPASSWD_FORM"`
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CustomTemplatesDir string `flag:"custom-templates-dir" cfg:"custom_templates_dir" env:"OAUTH2_PROXY_CUSTOM_TEMPLATES_DIR"`
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Banner string `flag:"banner" cfg:"banner" env:"OAUTH2_PROXY_BANNER"`
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Footer string `flag:"footer" cfg:"footer" env:"OAUTH2_PROXY_FOOTER"`
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// Embed CookieOptions
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options.CookieOptions
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// Embed SessionOptions
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options.SessionOptions
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Upstreams []string `flag:"upstream" cfg:"upstreams" env:"OAUTH2_PROXY_UPSTREAMS"`
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SkipAuthRegex []string `flag:"skip-auth-regex" cfg:"skip_auth_regex" env:"OAUTH2_PROXY_SKIP_AUTH_REGEX"`
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SkipJwtBearerTokens bool `flag:"skip-jwt-bearer-tokens" cfg:"skip_jwt_bearer_tokens" env:"OAUTH2_PROXY_SKIP_JWT_BEARER_TOKENS"`
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ExtraJwtIssuers []string `flag:"extra-jwt-issuers" cfg:"extra_jwt_issuers" env:"OAUTH2_PROXY_EXTRA_JWT_ISSUERS"`
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PassBasicAuth bool `flag:"pass-basic-auth" cfg:"pass_basic_auth" env:"OAUTH2_PROXY_PASS_BASIC_AUTH"`
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BasicAuthPassword string `flag:"basic-auth-password" cfg:"basic_auth_password" env:"OAUTH2_PROXY_BASIC_AUTH_PASSWORD"`
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PassAccessToken bool `flag:"pass-access-token" cfg:"pass_access_token" env:"OAUTH2_PROXY_PASS_ACCESS_TOKEN"`
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PassHostHeader bool `flag:"pass-host-header" cfg:"pass_host_header" env:"OAUTH2_PROXY_PASS_HOST_HEADER"`
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SkipProviderButton bool `flag:"skip-provider-button" cfg:"skip_provider_button" env:"OAUTH2_PROXY_SKIP_PROVIDER_BUTTON"`
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PassUserHeaders bool `flag:"pass-user-headers" cfg:"pass_user_headers" env:"OAUTH2_PROXY_PASS_USER_HEADERS"`
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SSLInsecureSkipVerify bool `flag:"ssl-insecure-skip-verify" cfg:"ssl_insecure_skip_verify" env:"OAUTH2_PROXY_SSL_INSECURE_SKIP_VERIFY"`
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SSLUpstreamInsecureSkipVerify bool `flag:"ssl-upstream-insecure-skip-verify" cfg:"ssl_upstream_insecure_skip_verify" env:"OAUTH2_PROXY_SSL_UPSTREAM_INSECURE_SKIP_VERIFY"`
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SetXAuthRequest bool `flag:"set-xauthrequest" cfg:"set_xauthrequest" env:"OAUTH2_PROXY_SET_XAUTHREQUEST"`
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SetAuthorization bool `flag:"set-authorization-header" cfg:"set_authorization_header" env:"OAUTH2_PROXY_SET_AUTHORIZATION_HEADER"`
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PassAuthorization bool `flag:"pass-authorization-header" cfg:"pass_authorization_header" env:"OAUTH2_PROXY_PASS_AUTHORIZATION_HEADER"`
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SkipAuthPreflight bool `flag:"skip-auth-preflight" cfg:"skip_auth_preflight" env:"OAUTH2_PROXY_SKIP_AUTH_PREFLIGHT"`
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FlushInterval time.Duration `flag:"flush-interval" cfg:"flush_interval" env:"OAUTH2_PROXY_FLUSH_INTERVAL"`
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// These options allow for other providers besides Google, with
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// potential overrides.
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Provider string `flag:"provider" cfg:"provider" env:"OAUTH2_PROXY_PROVIDER"`
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OIDCIssuerURL string `flag:"oidc-issuer-url" cfg:"oidc_issuer_url" env:"OAUTH2_PROXY_OIDC_ISSUER_URL"`
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InsecureOIDCAllowUnverifiedEmail bool `flag:"insecure-oidc-allow-unverified-email" cfg:"insecure_oidc_allow_unverified_email" env:"OAUTH2_PROXY_INSECURE_OIDC_ALLOW_UNVERIFIED_EMAIL"`
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SkipOIDCDiscovery bool `flag:"skip-oidc-discovery" cfg:"skip_oidc_discovery" env:"OAUTH2_PROXY_SKIP_OIDC_DISCOVERY"`
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OIDCJwksURL string `flag:"oidc-jwks-url" cfg:"oidc_jwks_url" env:"OAUTH2_PROXY_OIDC_JWKS_URL"`
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LoginURL string `flag:"login-url" cfg:"login_url" env:"OAUTH2_PROXY_LOGIN_URL"`
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RedeemURL string `flag:"redeem-url" cfg:"redeem_url" env:"OAUTH2_PROXY_REDEEM_URL"`
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ProfileURL string `flag:"profile-url" cfg:"profile_url" env:"OAUTH2_PROXY_PROFILE_URL"`
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ProtectedResource string `flag:"resource" cfg:"resource" env:"OAUTH2_PROXY_RESOURCE"`
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ValidateURL string `flag:"validate-url" cfg:"validate_url" env:"OAUTH2_PROXY_VALIDATE_URL"`
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Scope string `flag:"scope" cfg:"scope" env:"OAUTH2_PROXY_SCOPE"`
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ApprovalPrompt string `flag:"approval-prompt" cfg:"approval_prompt" env:"OAUTH2_PROXY_APPROVAL_PROMPT"`
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// Configuration values for logging
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LoggingFilename string `flag:"logging-filename" cfg:"logging_filename" env:"OAUTH2_PROXY_LOGGING_FILENAME"`
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LoggingMaxSize int `flag:"logging-max-size" cfg:"logging_max_size" env:"OAUTH2_PROXY_LOGGING_MAX_SIZE"`
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LoggingMaxAge int `flag:"logging-max-age" cfg:"logging_max_age" env:"OAUTH2_PROXY_LOGGING_MAX_AGE"`
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LoggingMaxBackups int `flag:"logging-max-backups" cfg:"logging_max_backups" env:"OAUTH2_PROXY_LOGGING_MAX_BACKUPS"`
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LoggingLocalTime bool `flag:"logging-local-time" cfg:"logging_local_time" env:"OAUTH2_PROXY_LOGGING_LOCAL_TIME"`
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LoggingCompress bool `flag:"logging-compress" cfg:"logging_compress" env:"OAUTH2_PROXY_LOGGING_COMPRESS"`
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StandardLogging bool `flag:"standard-logging" cfg:"standard_logging" env:"OAUTH2_PROXY_STANDARD_LOGGING"`
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StandardLoggingFormat string `flag:"standard-logging-format" cfg:"standard_logging_format" env:"OAUTH2_PROXY_STANDARD_LOGGING_FORMAT"`
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RequestLogging bool `flag:"request-logging" cfg:"request_logging" env:"OAUTH2_PROXY_REQUEST_LOGGING"`
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RequestLoggingFormat string `flag:"request-logging-format" cfg:"request_logging_format" env:"OAUTH2_PROXY_REQUEST_LOGGING_FORMAT"`
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ExcludeLoggingPaths string `flag:"exclude-logging-paths" cfg:"exclude_logging_paths" env:"OAUTH2_PROXY_EXCLUDE_LOGGING_PATHS"`
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SilencePingLogging bool `flag:"silence-ping-logging" cfg:"silence_ping_logging" env:"OAUTH2_PROXY_SILENCE_PING_LOGGING"`
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AuthLogging bool `flag:"auth-logging" cfg:"auth_logging" env:"OAUTH2_PROXY_LOGGING_AUTH_LOGGING"`
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AuthLoggingFormat string `flag:"auth-logging-format" cfg:"auth_logging_format" env:"OAUTH2_PROXY_AUTH_LOGGING_FORMAT"`
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SignatureKey string `flag:"signature-key" cfg:"signature_key" env:"OAUTH2_PROXY_SIGNATURE_KEY"`
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AcrValues string `flag:"acr-values" cfg:"acr_values" env:"OAUTH2_PROXY_ACR_VALUES"`
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JWTKey string `flag:"jwt-key" cfg:"jwt_key" env:"OAUTH2_PROXY_JWT_KEY"`
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JWTKeyFile string `flag:"jwt-key-file" cfg:"jwt_key_file" env:"OAUTH2_PROXY_JWT_KEY_FILE"`
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PubJWKURL string `flag:"pubjwk-url" cfg:"pubjwk_url" env:"OAUTH2_PROXY_PUBJWK_URL"`
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GCPHealthChecks bool `flag:"gcp-healthchecks" cfg:"gcp_healthchecks" env:"OAUTH2_PROXY_GCP_HEALTHCHECKS"`
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// internal values that are set after config validation
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redirectURL *url.URL
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proxyURLs []*url.URL
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CompiledRegex []*regexp.Regexp
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provider providers.Provider
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sessionStore sessionsapi.SessionStore
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signatureData *SignatureData
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oidcVerifier *oidc.IDTokenVerifier
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jwtBearerVerifiers []*oidc.IDTokenVerifier
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}
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// SignatureData holds hmacauth signature hash and key
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type SignatureData struct {
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hash crypto.Hash
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key string
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}
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// NewOptions constructs a new Options with defaulted values
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func NewOptions() *Options {
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return &Options{
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ProxyPrefix: "/oauth2",
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PingPath: "/ping",
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ProxyWebSockets: true,
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HTTPAddress: "127.0.0.1:4180",
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HTTPSAddress: ":443",
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DisplayHtpasswdForm: true,
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CookieOptions: options.CookieOptions{
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CookieName: "_oauth2_proxy",
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CookieSecure: true,
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CookieHTTPOnly: true,
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CookieExpire: time.Duration(168) * time.Hour,
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CookieRefresh: time.Duration(0),
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},
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SessionOptions: options.SessionOptions{
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Type: "cookie",
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},
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SetXAuthRequest: false,
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SkipAuthPreflight: false,
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PassBasicAuth: true,
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PassUserHeaders: true,
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PassAccessToken: false,
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PassHostHeader: true,
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SetAuthorization: false,
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PassAuthorization: false,
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ApprovalPrompt: "force",
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InsecureOIDCAllowUnverifiedEmail: false,
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SkipOIDCDiscovery: false,
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LoggingFilename: "",
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LoggingMaxSize: 100,
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LoggingMaxAge: 7,
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LoggingMaxBackups: 0,
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LoggingLocalTime: true,
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LoggingCompress: false,
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ExcludeLoggingPaths: "",
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SilencePingLogging: false,
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StandardLogging: true,
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StandardLoggingFormat: logger.DefaultStandardLoggingFormat,
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RequestLogging: true,
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RequestLoggingFormat: logger.DefaultRequestLoggingFormat,
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AuthLogging: true,
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AuthLoggingFormat: logger.DefaultAuthLoggingFormat,
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}
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}
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// jwtIssuer hold parsed JWT issuer info that's used to construct a verifier.
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type jwtIssuer struct {
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issuerURI string
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audience string
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}
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func parseURL(toParse string, urltype string, msgs []string) (*url.URL, []string) {
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parsed, err := url.Parse(toParse)
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if err != nil {
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return nil, append(msgs, fmt.Sprintf(
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"error parsing %s-url=%q %s", urltype, toParse, err))
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}
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return parsed, msgs
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}
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// Validate checks that required options are set and validates those that they
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// are of the correct format
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func (o *Options) Validate() error {
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if o.SSLInsecureSkipVerify {
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// TODO: Accept a certificate bundle.
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insecureTransport := &http.Transport{
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TLSClientConfig: &tls.Config{InsecureSkipVerify: true},
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}
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http.DefaultClient = &http.Client{Transport: insecureTransport}
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}
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msgs := make([]string, 0)
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if o.CookieSecret == "" {
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msgs = append(msgs, "missing setting: cookie-secret")
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}
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if o.ClientID == "" {
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msgs = append(msgs, "missing setting: client-id")
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}
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// login.gov uses a signed JWT to authenticate, not a client-secret
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if o.ClientSecret == "" && o.Provider != "login.gov" {
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msgs = append(msgs, "missing setting: client-secret")
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}
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if o.AuthenticatedEmailsFile == "" && len(o.EmailDomains) == 0 && o.HtpasswdFile == "" {
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msgs = append(msgs, "missing setting for email validation: email-domain or authenticated-emails-file required."+
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"\n use email-domain=* to authorize all email addresses")
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}
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if o.OIDCIssuerURL != "" {
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ctx := context.Background()
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// Construct a manual IDTokenVerifier from issuer URL & JWKS URI
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// instead of metadata discovery if we enable -skip-oidc-discovery.
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// In this case we need to make sure the required endpoints for
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// the provider are configured.
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if o.SkipOIDCDiscovery {
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if o.LoginURL == "" {
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msgs = append(msgs, "missing setting: login-url")
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}
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if o.RedeemURL == "" {
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msgs = append(msgs, "missing setting: redeem-url")
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}
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if o.OIDCJwksURL == "" {
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msgs = append(msgs, "missing setting: oidc-jwks-url")
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}
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keySet := oidc.NewRemoteKeySet(ctx, o.OIDCJwksURL)
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o.oidcVerifier = oidc.NewVerifier(o.OIDCIssuerURL, keySet, &oidc.Config{
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ClientID: o.ClientID,
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})
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} else {
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// Configure discoverable provider data.
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provider, err := oidc.NewProvider(ctx, o.OIDCIssuerURL)
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if err != nil {
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return err
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}
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o.oidcVerifier = provider.Verifier(&oidc.Config{
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ClientID: o.ClientID,
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})
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o.LoginURL = provider.Endpoint().AuthURL
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o.RedeemURL = provider.Endpoint().TokenURL
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}
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if o.Scope == "" {
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o.Scope = "openid email profile"
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}
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}
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if o.SkipJwtBearerTokens {
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// If we are using an oidc provider, go ahead and add that provider to the list
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if o.oidcVerifier != nil {
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o.jwtBearerVerifiers = append(o.jwtBearerVerifiers, o.oidcVerifier)
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}
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// Configure extra issuers
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if len(o.ExtraJwtIssuers) > 0 {
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var jwtIssuers []jwtIssuer
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jwtIssuers, msgs = parseJwtIssuers(o.ExtraJwtIssuers, msgs)
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for _, jwtIssuer := range jwtIssuers {
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verifier, err := newVerifierFromJwtIssuer(jwtIssuer)
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if err != nil {
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msgs = append(msgs, fmt.Sprintf("error building verifiers: %s", err))
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}
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o.jwtBearerVerifiers = append(o.jwtBearerVerifiers, verifier)
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}
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}
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}
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o.redirectURL, msgs = parseURL(o.RedirectURL, "redirect", msgs)
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for _, u := range o.Upstreams {
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upstreamURL, err := url.Parse(u)
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if err != nil {
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msgs = append(msgs, fmt.Sprintf("error parsing upstream: %s", err))
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} else {
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if upstreamURL.Path == "" {
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upstreamURL.Path = "/"
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}
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o.proxyURLs = append(o.proxyURLs, upstreamURL)
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}
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}
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for _, u := range o.SkipAuthRegex {
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CompiledRegex, err := regexp.Compile(u)
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if err != nil {
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msgs = append(msgs, fmt.Sprintf("error compiling regex=%q %s", u, err))
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continue
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}
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o.CompiledRegex = append(o.CompiledRegex, CompiledRegex)
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}
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msgs = parseProviderInfo(o, msgs)
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var cipher *encryption.Cipher
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if o.PassAccessToken || o.SetAuthorization || o.PassAuthorization || (o.CookieRefresh != time.Duration(0)) {
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validCookieSecretSize := false
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for _, i := range []int{16, 24, 32} {
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if len(secretBytes(o.CookieSecret)) == i {
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validCookieSecretSize = true
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}
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}
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var decoded bool
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if string(secretBytes(o.CookieSecret)) != o.CookieSecret {
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decoded = true
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}
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if validCookieSecretSize == false {
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var suffix string
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if decoded {
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suffix = fmt.Sprintf(" note: cookie secret was base64 decoded from %q", o.CookieSecret)
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}
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msgs = append(msgs, fmt.Sprintf(
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"cookie_secret must be 16, 24, or 32 bytes "+
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"to create an AES cipher when "+
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"pass_access_token == true or "+
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"cookie_refresh != 0, but is %d bytes.%s",
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len(secretBytes(o.CookieSecret)), suffix))
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} else {
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var err error
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cipher, err = encryption.NewCipher(secretBytes(o.CookieSecret))
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if err != nil {
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msgs = append(msgs, fmt.Sprintf("cookie-secret error: %v", err))
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}
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}
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}
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o.SessionOptions.Cipher = cipher
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sessionStore, err := sessions.NewSessionStore(&o.SessionOptions, &o.CookieOptions)
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if err != nil {
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msgs = append(msgs, fmt.Sprintf("error initialising session storage: %v", err))
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} else {
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o.sessionStore = sessionStore
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}
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if o.CookieRefresh >= o.CookieExpire {
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msgs = append(msgs, fmt.Sprintf(
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"cookie_refresh (%s) must be less than "+
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"cookie_expire (%s)",
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o.CookieRefresh.String(),
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o.CookieExpire.String()))
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}
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if len(o.GoogleGroups) > 0 || o.GoogleAdminEmail != "" || o.GoogleServiceAccountJSON != "" {
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if len(o.GoogleGroups) < 1 {
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msgs = append(msgs, "missing setting: google-group")
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}
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if o.GoogleAdminEmail == "" {
|
|
msgs = append(msgs, "missing setting: google-admin-email")
|
|
}
|
|
if o.GoogleServiceAccountJSON == "" {
|
|
msgs = append(msgs, "missing setting: google-service-account-json")
|
|
}
|
|
}
|
|
|
|
msgs = parseSignatureKey(o, msgs)
|
|
msgs = validateCookieName(o, msgs)
|
|
msgs = setupLogger(o, msgs)
|
|
|
|
if len(msgs) != 0 {
|
|
return fmt.Errorf("Invalid configuration:\n %s",
|
|
strings.Join(msgs, "\n "))
|
|
}
|
|
return nil
|
|
}
|
|
|
|
func parseProviderInfo(o *Options, msgs []string) []string {
|
|
p := &providers.ProviderData{
|
|
Scope: o.Scope,
|
|
ClientID: o.ClientID,
|
|
ClientSecret: o.ClientSecret,
|
|
ApprovalPrompt: o.ApprovalPrompt,
|
|
}
|
|
p.LoginURL, msgs = parseURL(o.LoginURL, "login", msgs)
|
|
p.RedeemURL, msgs = parseURL(o.RedeemURL, "redeem", msgs)
|
|
p.ProfileURL, msgs = parseURL(o.ProfileURL, "profile", msgs)
|
|
p.ValidateURL, msgs = parseURL(o.ValidateURL, "validate", msgs)
|
|
p.ProtectedResource, msgs = parseURL(o.ProtectedResource, "resource", msgs)
|
|
|
|
o.provider = providers.New(o.Provider, p)
|
|
switch p := o.provider.(type) {
|
|
case *providers.AzureProvider:
|
|
p.Configure(o.AzureTenant)
|
|
case *providers.GitHubProvider:
|
|
p.SetOrgTeam(o.GitHubOrg, o.GitHubTeam)
|
|
case *providers.KeycloakProvider:
|
|
p.SetGroup(o.KeycloakGroup)
|
|
case *providers.GoogleProvider:
|
|
if o.GoogleServiceAccountJSON != "" {
|
|
file, err := os.Open(o.GoogleServiceAccountJSON)
|
|
if err != nil {
|
|
msgs = append(msgs, "invalid Google credentials file: "+o.GoogleServiceAccountJSON)
|
|
} else {
|
|
p.SetGroupRestriction(o.GoogleGroups, o.GoogleAdminEmail, file)
|
|
}
|
|
}
|
|
case *providers.BitbucketProvider:
|
|
p.SetTeam(o.BitbucketTeam)
|
|
p.SetRepository(o.BitbucketRepository)
|
|
case *providers.OIDCProvider:
|
|
p.AllowUnverifiedEmail = o.InsecureOIDCAllowUnverifiedEmail
|
|
if o.oidcVerifier == nil {
|
|
msgs = append(msgs, "oidc provider requires an oidc issuer URL")
|
|
} else {
|
|
p.Verifier = o.oidcVerifier
|
|
}
|
|
case *providers.GitLabProvider:
|
|
p.AllowUnverifiedEmail = o.InsecureOIDCAllowUnverifiedEmail
|
|
p.Group = o.GitLabGroup
|
|
p.EmailDomains = o.EmailDomains
|
|
|
|
if o.oidcVerifier != nil {
|
|
p.Verifier = o.oidcVerifier
|
|
} else {
|
|
// Initialize with default verifier for gitlab.com
|
|
ctx := context.Background()
|
|
|
|
provider, err := oidc.NewProvider(ctx, "https://gitlab.com")
|
|
if err != nil {
|
|
msgs = append(msgs, "failed to initialize oidc provider for gitlab.com")
|
|
} else {
|
|
p.Verifier = provider.Verifier(&oidc.Config{
|
|
ClientID: o.ClientID,
|
|
})
|
|
|
|
p.LoginURL, msgs = parseURL(provider.Endpoint().AuthURL, "login", msgs)
|
|
p.RedeemURL, msgs = parseURL(provider.Endpoint().TokenURL, "redeem", msgs)
|
|
}
|
|
}
|
|
case *providers.LoginGovProvider:
|
|
p.AcrValues = o.AcrValues
|
|
p.PubJWKURL, msgs = parseURL(o.PubJWKURL, "pubjwk", msgs)
|
|
|
|
// JWT key can be supplied via env variable or file in the filesystem, but not both.
|
|
switch {
|
|
case o.JWTKey != "" && o.JWTKeyFile != "":
|
|
msgs = append(msgs, "cannot set both jwt-key and jwt-key-file options")
|
|
case o.JWTKey == "" && o.JWTKeyFile == "":
|
|
msgs = append(msgs, "login.gov provider requires a private key for signing JWTs")
|
|
case o.JWTKey != "":
|
|
// The JWT Key is in the commandline argument
|
|
signKey, err := jwt.ParseRSAPrivateKeyFromPEM([]byte(o.JWTKey))
|
|
if err != nil {
|
|
msgs = append(msgs, "could not parse RSA Private Key PEM")
|
|
} else {
|
|
p.JWTKey = signKey
|
|
}
|
|
case o.JWTKeyFile != "":
|
|
// The JWT key is in the filesystem
|
|
keyData, err := ioutil.ReadFile(o.JWTKeyFile)
|
|
if err != nil {
|
|
msgs = append(msgs, "could not read key file: "+o.JWTKeyFile)
|
|
}
|
|
signKey, err := jwt.ParseRSAPrivateKeyFromPEM(keyData)
|
|
if err != nil {
|
|
msgs = append(msgs, "could not parse private key from PEM file:"+o.JWTKeyFile)
|
|
} else {
|
|
p.JWTKey = signKey
|
|
}
|
|
}
|
|
}
|
|
return msgs
|
|
}
|
|
|
|
func parseSignatureKey(o *Options, msgs []string) []string {
|
|
if o.SignatureKey == "" {
|
|
return msgs
|
|
}
|
|
|
|
components := strings.Split(o.SignatureKey, ":")
|
|
if len(components) != 2 {
|
|
return append(msgs, "invalid signature hash:key spec: "+
|
|
o.SignatureKey)
|
|
}
|
|
|
|
algorithm, secretKey := components[0], components[1]
|
|
var hash crypto.Hash
|
|
var err error
|
|
if hash, err = hmacauth.DigestNameToCryptoHash(algorithm); err != nil {
|
|
return append(msgs, "unsupported signature hash algorithm: "+
|
|
o.SignatureKey)
|
|
}
|
|
o.signatureData = &SignatureData{hash: hash, key: secretKey}
|
|
return msgs
|
|
}
|
|
|
|
// parseJwtIssuers takes in an array of strings in the form of issuer=audience
|
|
// and parses to an array of jwtIssuer structs.
|
|
func parseJwtIssuers(issuers []string, msgs []string) ([]jwtIssuer, []string) {
|
|
var parsedIssuers []jwtIssuer
|
|
for _, jwtVerifier := range issuers {
|
|
components := strings.Split(jwtVerifier, "=")
|
|
if len(components) < 2 {
|
|
msgs = append(msgs, fmt.Sprintf("invalid jwt verifier uri=audience spec: %s", jwtVerifier))
|
|
continue
|
|
}
|
|
uri, audience := components[0], strings.Join(components[1:], "=")
|
|
parsedIssuers = append(parsedIssuers, jwtIssuer{issuerURI: uri, audience: audience})
|
|
}
|
|
return parsedIssuers, msgs
|
|
}
|
|
|
|
// newVerifierFromJwtIssuer takes in issuer information in jwtIssuer info and returns
|
|
// a verifier for that issuer.
|
|
func newVerifierFromJwtIssuer(jwtIssuer jwtIssuer) (*oidc.IDTokenVerifier, error) {
|
|
config := &oidc.Config{
|
|
ClientID: jwtIssuer.audience,
|
|
}
|
|
// Try as an OpenID Connect Provider first
|
|
var verifier *oidc.IDTokenVerifier
|
|
provider, err := oidc.NewProvider(context.Background(), jwtIssuer.issuerURI)
|
|
if err != nil {
|
|
// Try as JWKS URI
|
|
jwksURI := strings.TrimSuffix(jwtIssuer.issuerURI, "/") + "/.well-known/jwks.json"
|
|
_, err := http.NewRequest("GET", jwksURI, nil)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
verifier = oidc.NewVerifier(jwtIssuer.issuerURI, oidc.NewRemoteKeySet(context.Background(), jwksURI), config)
|
|
} else {
|
|
verifier = provider.Verifier(config)
|
|
}
|
|
return verifier, nil
|
|
}
|
|
|
|
func validateCookieName(o *Options, msgs []string) []string {
|
|
cookie := &http.Cookie{Name: o.CookieName}
|
|
if cookie.String() == "" {
|
|
return append(msgs, fmt.Sprintf("invalid cookie name: %q", o.CookieName))
|
|
}
|
|
return msgs
|
|
}
|
|
|
|
func addPadding(secret string) string {
|
|
padding := len(secret) % 4
|
|
switch padding {
|
|
case 1:
|
|
return secret + "==="
|
|
case 2:
|
|
return secret + "=="
|
|
case 3:
|
|
return secret + "="
|
|
default:
|
|
return secret
|
|
}
|
|
}
|
|
|
|
// secretBytes attempts to base64 decode the secret, if that fails it treats the secret as binary
|
|
func secretBytes(secret string) []byte {
|
|
b, err := base64.URLEncoding.DecodeString(addPadding(secret))
|
|
if err == nil {
|
|
return []byte(addPadding(string(b)))
|
|
}
|
|
return []byte(secret)
|
|
}
|
|
|
|
func setupLogger(o *Options, msgs []string) []string {
|
|
// Setup the log file
|
|
if len(o.LoggingFilename) > 0 {
|
|
// Validate that the file/dir can be written
|
|
file, err := os.OpenFile(o.LoggingFilename, os.O_WRONLY|os.O_CREATE, 0666)
|
|
if err != nil {
|
|
if os.IsPermission(err) {
|
|
return append(msgs, "unable to write to log file: "+o.LoggingFilename)
|
|
}
|
|
}
|
|
file.Close()
|
|
|
|
logger.Printf("Redirecting logging to file: %s", o.LoggingFilename)
|
|
|
|
logWriter := &lumberjack.Logger{
|
|
Filename: o.LoggingFilename,
|
|
MaxSize: o.LoggingMaxSize, // megabytes
|
|
MaxAge: o.LoggingMaxAge, // days
|
|
MaxBackups: o.LoggingMaxBackups,
|
|
LocalTime: o.LoggingLocalTime,
|
|
Compress: o.LoggingCompress,
|
|
}
|
|
|
|
logger.SetOutput(logWriter)
|
|
}
|
|
|
|
// Supply a sanity warning to the logger if all logging is disabled
|
|
if !o.StandardLogging && !o.AuthLogging && !o.RequestLogging {
|
|
logger.Print("Warning: Logging disabled. No further logs will be shown.")
|
|
}
|
|
|
|
// Pass configuration values to the standard logger
|
|
logger.SetStandardEnabled(o.StandardLogging)
|
|
logger.SetAuthEnabled(o.AuthLogging)
|
|
logger.SetReqEnabled(o.RequestLogging)
|
|
logger.SetStandardTemplate(o.StandardLoggingFormat)
|
|
logger.SetAuthTemplate(o.AuthLoggingFormat)
|
|
logger.SetReqTemplate(o.RequestLoggingFormat)
|
|
|
|
excludePaths := make([]string, 0)
|
|
excludePaths = append(excludePaths, strings.Split(o.ExcludeLoggingPaths, ",")...)
|
|
if o.SilencePingLogging {
|
|
excludePaths = append(excludePaths, o.PingPath)
|
|
}
|
|
|
|
logger.SetExcludePaths(excludePaths)
|
|
|
|
if !o.LoggingLocalTime {
|
|
logger.SetFlags(logger.Flags() | logger.LUTC)
|
|
}
|
|
|
|
return msgs
|
|
}
|