/
access_control_rule.go
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/
access_control_rule.go
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package authorization
import (
"net"
"github.com/authelia/authelia/v4/internal/configuration/schema"
"github.com/authelia/authelia/v4/internal/utils"
)
// NewAccessControlRules converts a schema.AccessControlConfiguration into an AccessControlRule slice.
func NewAccessControlRules(config schema.AccessControlConfiguration) (rules []*AccessControlRule) {
networksMap, networksCacheMap := parseSchemaNetworks(config.Networks)
for i, schemaRule := range config.Rules {
rules = append(rules, NewAccessControlRule(i+1, schemaRule, networksMap, networksCacheMap))
}
return rules
}
// NewAccessControlRule parses a schema ACL and generates an internal ACL.
func NewAccessControlRule(pos int, rule schema.ACLRule, networksMap map[string][]*net.IPNet, networksCacheMap map[string]*net.IPNet) *AccessControlRule {
return &AccessControlRule{
Position: pos,
Domains: schemaDomainsToACL(rule.Domains, rule.DomainsRegex),
Resources: schemaResourcesToACL(rule.Resources),
Methods: schemaMethodsToACL(rule.Methods),
Networks: schemaNetworksToACL(rule.Networks, networksMap, networksCacheMap),
Subjects: schemaSubjectsToACL(rule.Subjects),
Policy: PolicyToLevel(rule.Policy),
}
}
// AccessControlRule controls and represents an ACL internally.
type AccessControlRule struct {
Position int
Domains []SubjectObjectMatcher
Resources []AccessControlResource
Methods []string
Networks []*net.IPNet
Subjects []AccessControlSubjects
Policy Level
}
// IsMatch returns true if all elements of an AccessControlRule match the object and subject.
func (acr *AccessControlRule) IsMatch(subject Subject, object Object) (match bool) {
if !isMatchForDomains(subject, object, acr) {
return false
}
if !isMatchForResources(object, acr) {
return false
}
if !isMatchForMethods(object, acr) {
return false
}
if !isMatchForNetworks(subject, acr) {
return false
}
if !isMatchForSubjects(subject, acr) {
return false
}
return true
}
func isMatchForDomains(subject Subject, object Object, acl *AccessControlRule) (match bool) {
// If there are no domains in this rule then the domain condition is a match.
if len(acl.Domains) == 0 {
return true
}
// Iterate over the domains until we find a match (return true) or until we exit the loop (return false).
for _, domain := range acl.Domains {
if domain.IsMatch(subject, object) {
return true
}
}
return false
}
func isMatchForResources(object Object, acl *AccessControlRule) (match bool) {
// If there are no resources in this rule then the resource condition is a match.
if len(acl.Resources) == 0 {
return true
}
// Iterate over the resources until we find a match (return true) or until we exit the loop (return false).
for _, resource := range acl.Resources {
if resource.IsMatch(object) {
return true
}
}
return false
}
func isMatchForMethods(object Object, acl *AccessControlRule) (match bool) {
// If there are no methods in this rule then the method condition is a match.
if len(acl.Methods) == 0 {
return true
}
return utils.IsStringInSlice(object.Method, acl.Methods)
}
func isMatchForNetworks(subject Subject, acl *AccessControlRule) (match bool) {
// If there are no networks in this rule then the network condition is a match.
if len(acl.Networks) == 0 {
return true
}
// Iterate over the networks until we find a match (return true) or until we exit the loop (return false).
for _, network := range acl.Networks {
if network.Contains(subject.IP) {
return true
}
}
return false
}
// Same as isExactMatchForSubjects except it theoretically matches if subject is anonymous since they'd need to authenticate.
func isMatchForSubjects(subject Subject, acl *AccessControlRule) (match bool) {
if subject.IsAnonymous() {
return true
}
return isExactMatchForSubjects(subject, acl)
}
func isExactMatchForSubjects(subject Subject, acl *AccessControlRule) (match bool) {
// If there are no subjects in this rule then the subject condition is a match.
if len(acl.Subjects) == 0 {
return true
} else if subject.IsAnonymous() {
return false
}
// Iterate over the subjects until we find a match (return true) or until we exit the loop (return false).
for _, subjectRule := range acl.Subjects {
if subjectRule.IsMatch(subject) {
return true
}
}
return false
}