/
access_control.go
211 lines (175 loc) · 7.1 KB
/
access_control.go
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package validator
import (
"fmt"
"net"
"regexp"
"strings"
"github.com/authelia/authelia/v4/internal/authorization"
"github.com/authelia/authelia/v4/internal/configuration/schema"
"github.com/authelia/authelia/v4/internal/utils"
)
// IsPolicyValid check if policy is valid.
func IsPolicyValid(policy string) (isValid bool) {
return utils.IsStringInSlice(policy, validACLRulePolicies)
}
// IsSubjectValid check if a subject is valid.
func IsSubjectValid(subject string) (isValid bool) {
return subject == "" || strings.HasPrefix(subject, "user:") || strings.HasPrefix(subject, "group:")
}
// IsNetworkGroupValid check if a network group is valid.
func IsNetworkGroupValid(config schema.AccessControlConfiguration, network string) bool {
for _, networks := range config.Networks {
if network != networks.Name {
continue
} else {
return true
}
}
return false
}
// IsNetworkValid check if a network is valid.
func IsNetworkValid(network string) (isValid bool) {
if net.ParseIP(network) == nil {
_, _, err := net.ParseCIDR(network)
return err == nil
}
return true
}
func ruleDescriptor(position int, rule schema.ACLRule) string {
if len(rule.Domains) == 0 {
return fmt.Sprintf("#%d", position)
}
return fmt.Sprintf("#%d (domain '%s')", position, strings.Join(rule.Domains, ","))
}
// ValidateAccessControl validates access control configuration.
func ValidateAccessControl(config *schema.Configuration, validator *schema.StructValidator) {
if config.AccessControl.DefaultPolicy == "" {
config.AccessControl.DefaultPolicy = policyDeny
}
if !IsPolicyValid(config.AccessControl.DefaultPolicy) {
validator.Push(fmt.Errorf(errFmtAccessControlDefaultPolicyValue, strings.Join(validACLRulePolicies, "', '"), config.AccessControl.DefaultPolicy))
}
if config.AccessControl.Networks != nil {
for _, n := range config.AccessControl.Networks {
for _, networks := range n.Networks {
if !IsNetworkValid(networks) {
validator.Push(fmt.Errorf(errFmtAccessControlNetworkGroupIPCIDRInvalid, n.Name, networks))
}
}
}
}
}
// ValidateRules validates an ACL Rule configuration.
func ValidateRules(config *schema.Configuration, validator *schema.StructValidator) {
if config.AccessControl.Rules == nil || len(config.AccessControl.Rules) == 0 {
if config.AccessControl.DefaultPolicy != policyOneFactor && config.AccessControl.DefaultPolicy != policyTwoFactor {
validator.Push(fmt.Errorf(errFmtAccessControlDefaultPolicyWithoutRules, config.AccessControl.DefaultPolicy))
return
}
validator.PushWarning(fmt.Errorf(errFmtAccessControlWarnNoRulesDefaultPolicy, config.AccessControl.DefaultPolicy))
return
}
for i, rule := range config.AccessControl.Rules {
rulePosition := i + 1
if len(rule.Domains)+len(rule.DomainsRegex) == 0 {
validator.Push(fmt.Errorf(errFmtAccessControlRuleNoDomains, ruleDescriptor(rulePosition, rule)))
}
if !IsPolicyValid(rule.Policy) {
validator.Push(fmt.Errorf(errFmtAccessControlRuleInvalidPolicy, ruleDescriptor(rulePosition, rule), rule.Policy))
}
validateNetworks(rulePosition, rule, config.AccessControl, validator)
validateSubjects(rulePosition, rule, validator)
validateMethods(rulePosition, rule, validator)
validateQuery(i, rule, config, validator)
if rule.Policy == policyBypass {
validateBypass(rulePosition, rule, validator)
}
}
}
func validateBypass(rulePosition int, rule schema.ACLRule, validator *schema.StructValidator) {
if len(rule.Subjects) != 0 {
validator.Push(fmt.Errorf(errAccessControlRuleBypassPolicyInvalidWithSubjects, ruleDescriptor(rulePosition, rule)))
}
for _, pattern := range rule.DomainsRegex {
if utils.IsStringSliceContainsAny(authorization.IdentitySubexpNames, pattern.SubexpNames()) {
validator.Push(fmt.Errorf(errAccessControlRuleBypassPolicyInvalidWithSubjectsWithGroupDomainRegex, ruleDescriptor(rulePosition, rule)))
return
}
}
}
func validateNetworks(rulePosition int, rule schema.ACLRule, config schema.AccessControlConfiguration, validator *schema.StructValidator) {
for _, network := range rule.Networks {
if !IsNetworkValid(network) {
if !IsNetworkGroupValid(config, network) {
validator.Push(fmt.Errorf(errFmtAccessControlRuleNetworksInvalid, ruleDescriptor(rulePosition, rule), network))
}
}
}
}
func validateSubjects(rulePosition int, rule schema.ACLRule, validator *schema.StructValidator) {
for _, subjectRule := range rule.Subjects {
for _, subject := range subjectRule {
if !IsSubjectValid(subject) {
validator.Push(fmt.Errorf(errFmtAccessControlRuleSubjectInvalid, ruleDescriptor(rulePosition, rule), subject))
}
}
}
}
func validateMethods(rulePosition int, rule schema.ACLRule, validator *schema.StructValidator) {
for _, method := range rule.Methods {
if !utils.IsStringInSliceFold(method, validACLHTTPMethodVerbs) {
validator.Push(fmt.Errorf(errFmtAccessControlRuleMethodInvalid, ruleDescriptor(rulePosition, rule), method, strings.Join(validACLHTTPMethodVerbs, "', '")))
}
}
}
//nolint:gocyclo
func validateQuery(i int, rule schema.ACLRule, config *schema.Configuration, validator *schema.StructValidator) {
for j := 0; j < len(config.AccessControl.Rules[i].Query); j++ {
for k := 0; k < len(config.AccessControl.Rules[i].Query[j]); k++ {
if config.AccessControl.Rules[i].Query[j][k].Operator == "" {
if config.AccessControl.Rules[i].Query[j][k].Key != "" {
switch config.AccessControl.Rules[i].Query[j][k].Value {
case "", nil:
config.AccessControl.Rules[i].Query[j][k].Operator = operatorPresent
default:
config.AccessControl.Rules[i].Query[j][k].Operator = operatorEqual
}
}
} else if !utils.IsStringInSliceFold(config.AccessControl.Rules[i].Query[j][k].Operator, validACLRuleOperators) {
validator.Push(fmt.Errorf(errFmtAccessControlRuleQueryInvalid, ruleDescriptor(i+1, rule), config.AccessControl.Rules[i].Query[j][k].Operator, strings.Join(validACLRuleOperators, "', '")))
}
if config.AccessControl.Rules[i].Query[j][k].Key == "" {
validator.Push(fmt.Errorf(errFmtAccessControlRuleQueryInvalidNoValue, ruleDescriptor(i+1, rule), "key"))
}
op := config.AccessControl.Rules[i].Query[j][k].Operator
if op == "" {
continue
}
switch v := config.AccessControl.Rules[i].Query[j][k].Value.(type) {
case nil:
if op != operatorAbsent && op != operatorPresent {
validator.Push(fmt.Errorf(errFmtAccessControlRuleQueryInvalidNoValueOperator, ruleDescriptor(i+1, rule), "value", op))
}
case string:
switch op {
case operatorPresent, operatorAbsent:
if v != "" {
validator.Push(fmt.Errorf(errFmtAccessControlRuleQueryInvalidValue, ruleDescriptor(i+1, rule), "value", op))
}
case operatorPattern, operatorNotPattern:
var (
pattern *regexp.Regexp
err error
)
if pattern, err = regexp.Compile(v); err != nil {
validator.Push(fmt.Errorf(errFmtAccessControlRuleQueryInvalidValueParse, ruleDescriptor(i+1, rule), "value", err))
} else {
config.AccessControl.Rules[i].Query[j][k].Value = pattern
}
}
default:
validator.Push(fmt.Errorf(errFmtAccessControlRuleQueryInvalidValueType, ruleDescriptor(i+1, rule), v))
}
}
}
}