/
server.go
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/
server.go
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package validator
import (
"fmt"
"os"
"sort"
"strings"
"github.com/authelia/authelia/v4/internal/configuration/schema"
"github.com/authelia/authelia/v4/internal/utils"
)
// ValidateServerTLS checks a server TLS configuration is correct.
func ValidateServerTLS(config *schema.Configuration, validator *schema.StructValidator) {
if config.Server.TLS.Key != "" && config.Server.TLS.Certificate == "" {
validator.Push(fmt.Errorf(errFmtServerTLSCert))
} else if config.Server.TLS.Key == "" && config.Server.TLS.Certificate != "" {
validator.Push(fmt.Errorf(errFmtServerTLSKey))
}
if config.Server.TLS.Key != "" {
validateServerTLSFileExists("key", config.Server.TLS.Key, validator)
}
if config.Server.TLS.Certificate != "" {
validateServerTLSFileExists("certificate", config.Server.TLS.Certificate, validator)
}
if config.Server.TLS.Key == "" && config.Server.TLS.Certificate == "" &&
len(config.Server.TLS.ClientCertificates) > 0 {
validator.Push(fmt.Errorf(errFmtServerTLSClientAuthNoAuth))
}
for _, clientCertPath := range config.Server.TLS.ClientCertificates {
validateServerTLSFileExists("client_certificates", clientCertPath, validator)
}
}
// validateServerTLSFileExists checks whether a file exist.
func validateServerTLSFileExists(name, path string, validator *schema.StructValidator) {
var (
info os.FileInfo
err error
)
switch info, err = os.Stat(path); {
case os.IsNotExist(err):
validator.Push(fmt.Errorf("server: tls: option '%s' with path '%s' refers to a file that doesn't exist", name, path))
case err != nil:
validator.Push(fmt.Errorf("server: tls: option '%s' with path '%s' could not be verified due to a file system error: %w", name, path, err))
case info.IsDir():
validator.Push(fmt.Errorf("server: tls: option '%s' with path '%s' refers to a directory but it should refer to a file", name, path))
}
}
// ValidateServer checks the server configuration is correct.
func ValidateServer(config *schema.Configuration, validator *schema.StructValidator) {
ValidateServerAddress(config, validator)
ValidateServerTLS(config, validator)
if config.Server.Buffers.Read <= 0 {
config.Server.Buffers.Read = schema.DefaultServerConfiguration.Buffers.Read
}
if config.Server.Buffers.Write <= 0 {
config.Server.Buffers.Write = schema.DefaultServerConfiguration.Buffers.Write
}
if config.Server.Timeouts.Read <= 0 {
config.Server.Timeouts.Read = schema.DefaultServerConfiguration.Timeouts.Read
}
if config.Server.Timeouts.Write <= 0 {
config.Server.Timeouts.Write = schema.DefaultServerConfiguration.Timeouts.Write
}
if config.Server.Timeouts.Idle <= 0 {
config.Server.Timeouts.Idle = schema.DefaultServerConfiguration.Timeouts.Idle
}
ValidateServerEndpoints(config, validator)
}
// ValidateServerAddress checks the configured server address is correct.
//
func ValidateServerAddress(config *schema.Configuration, validator *schema.StructValidator) {
if config.Server.Address == nil {
config.Server.Address = schema.DefaultServerConfiguration.Address
} else {
var err error
if err = config.Server.Address.ValidateHTTP(); err != nil {
validator.Push(fmt.Errorf(errFmtServerAddress, config.Server.Address.String(), err))
}
}
switch subpath := config.Server.Address.RouterPath(); {
case subpath == "":
config.Server.Address.SetPath("/")
case subpath != "/":
if p := strings.TrimPrefix(subpath, "/"); strings.Contains(p, "/") {
validator.Push(fmt.Errorf(errFmtServerPathNotEndForwardSlash, subpath))
} else if !utils.IsStringAlphaNumeric(p) {
validator.Push(fmt.Errorf(errFmtServerPathAlphaNumeric, subpath))
}
}
}
// ValidateServerEndpoints configures the default endpoints and checks the configuration of custom endpoints.
func ValidateServerEndpoints(config *schema.Configuration, validator *schema.StructValidator) {
if config.Server.Endpoints.EnableExpvars {
validator.PushWarning(fmt.Errorf("server: endpoints: option 'enable_expvars' should not be enabled in production"))
}
if config.Server.Endpoints.EnablePprof {
validator.PushWarning(fmt.Errorf("server: endpoints: option 'enable_pprof' should not be enabled in production"))
}
if len(config.Server.Endpoints.Authz) == 0 {
config.Server.Endpoints.Authz = schema.DefaultServerConfiguration.Endpoints.Authz
return
}
authzs := make([]string, 0, len(config.Server.Endpoints.Authz))
for name := range config.Server.Endpoints.Authz {
authzs = append(authzs, name)
}
sort.Strings(authzs)
for _, name := range authzs {
endpoint := config.Server.Endpoints.Authz[name]
validateServerEndpointsAuthzEndpoint(config, name, endpoint, validator)
for _, oName := range authzs {
oEndpoint := config.Server.Endpoints.Authz[oName]
if oName == name || oName == legacy {
continue
}
switch oEndpoint.Implementation {
case schema.AuthzImplementationLegacy, schema.AuthzImplementationExtAuthz:
if strings.HasPrefix(name, oName+"/") {
validator.Push(fmt.Errorf(errFmtServerEndpointsAuthzPrefixDuplicate, name, oName, oEndpoint.Implementation))
}
default:
continue
}
}
validateServerEndpointsAuthzStrategies(name, endpoint.Implementation, endpoint.AuthnStrategies, validator)
}
}
func validateServerEndpointsAuthzEndpoint(config *schema.Configuration, name string, endpoint schema.ServerEndpointsAuthz, validator *schema.StructValidator) {
if name == legacy {
switch endpoint.Implementation {
case schema.AuthzImplementationLegacy:
break
case "":
endpoint.Implementation = schema.AuthzImplementationLegacy
config.Server.Endpoints.Authz[name] = endpoint
default:
if !utils.IsStringInSlice(endpoint.Implementation, validAuthzImplementations) {
validator.Push(fmt.Errorf(errFmtServerEndpointsAuthzImplementation, name, strJoinOr(validAuthzImplementations), endpoint.Implementation))
} else {
validator.Push(fmt.Errorf(errFmtServerEndpointsAuthzLegacyInvalidImplementation, name))
}
}
} else if !utils.IsStringInSlice(endpoint.Implementation, validAuthzImplementations) {
validator.Push(fmt.Errorf(errFmtServerEndpointsAuthzImplementation, name, strJoinOr(validAuthzImplementations), endpoint.Implementation))
}
if !reAuthzEndpointName.MatchString(name) {
validator.Push(fmt.Errorf(errFmtServerEndpointsAuthzInvalidName, name))
}
}
//nolint:gocyclo
func validateServerEndpointsAuthzStrategies(name, implementation string, strategies []schema.ServerEndpointsAuthzAuthnStrategy, validator *schema.StructValidator) {
var defaults []schema.ServerEndpointsAuthzAuthnStrategy
switch implementation {
case schema.AuthzImplementationLegacy:
defaults = schema.DefaultServerConfiguration.Endpoints.Authz[schema.AuthzEndpointNameLegacy].AuthnStrategies
case schema.AuthzImplementationAuthRequest:
defaults = schema.DefaultServerConfiguration.Endpoints.Authz[schema.AuthzEndpointNameAuthRequest].AuthnStrategies
case schema.AuthzImplementationExtAuthz:
defaults = schema.DefaultServerConfiguration.Endpoints.Authz[schema.AuthzEndpointNameExtAuthz].AuthnStrategies
case schema.AuthzImplementationForwardAuth:
defaults = schema.DefaultServerConfiguration.Endpoints.Authz[schema.AuthzEndpointNameForwardAuth].AuthnStrategies
}
if len(strategies) == 0 {
copy(strategies, defaults)
return
}
names := make([]string, len(strategies))
for i, strategy := range strategies {
if strategy.Name != "" && utils.IsStringInSlice(strategy.Name, names) {
validator.Push(fmt.Errorf(errFmtServerEndpointsAuthzStrategyDuplicate, name, strategy.Name))
}
names = append(names, strategy.Name)
switch {
case strategy.Name == "":
validator.Push(fmt.Errorf(errFmtServerEndpointsAuthzStrategyNoName, name, i+1))
case !utils.IsStringInSlice(strategy.Name, validAuthzAuthnStrategies):
validator.Push(fmt.Errorf(errFmtServerEndpointsAuthzStrategy, name, strJoinOr(validAuthzAuthnStrategies), strategy.Name))
default:
if utils.IsStringInSlice(strategy.Name, validAuthzAuthnHeaderStrategies) {
if len(strategy.Schemes) == 0 {
strategies[i].Schemes = defaults[0].Schemes
} else {
for _, scheme := range strategy.Schemes {
if !utils.IsStringInSliceFold(scheme, validAuthzAuthnStrategySchemes) {
validator.Push(fmt.Errorf(errFmtServerEndpointsAuthzSchemes, name, i+1, strategy.Name, strJoinOr(validAuthzAuthnStrategySchemes), scheme))
}
}
}
} else if len(strategy.Schemes) != 0 {
validator.Push(fmt.Errorf(errFmtServerEndpointsAuthzSchemesInvalidForStrategy, name, i+1, strategy.Name))
}
}
}
}