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