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package authorization
import (
"fmt"
"regexp"
"github.com/authelia/authelia/v4/internal/configuration/schema"
)
// NewAccessControlQuery creates a new AccessControlQuery rule type.
func NewAccessControlQuery(config [][]schema.AccessControlRuleQuery) (rules []AccessControlQuery) {
if len(config) == 0 {
return nil
}
for i := 0; i < len(config); i++ {
var rule []ObjectMatcher
for j := 0; j < len(config[i]); j++ {
subRule, err := NewAccessControlQueryObjectMatcher(config[i][j])
if err != nil {
continue
}
rule = append(rule, subRule)
}
rules = append(rules, AccessControlQuery{Rules: rule})
}
return rules
}
// AccessControlQuery represents an ACL query args rule.
type AccessControlQuery struct {
Rules []ObjectMatcher
}
// IsMatch returns true if this rule matches the object.
func (acq AccessControlQuery) IsMatch(object Object) (isMatch bool) {
for _, rule := range acq.Rules {
if !rule.IsMatch(object) {
return false
}
}
return true
}
// NewAccessControlQueryObjectMatcher creates a new ObjectMatcher rule type from a schema.AccessControlRuleQuery.
func NewAccessControlQueryObjectMatcher(rule schema.AccessControlRuleQuery) (matcher ObjectMatcher, err error) {
switch rule.Operator {
case operatorPresent, operatorAbsent:
return &AccessControlQueryMatcherPresent{key: rule.Key, present: rule.Operator == operatorPresent}, nil
case operatorEqual, operatorNotEqual:
if value, ok := rule.Value.(string); ok {
return &AccessControlQueryMatcherEqual{key: rule.Key, value: value, equal: rule.Operator == operatorEqual}, nil
} else {
return nil, fmt.Errorf("rule value is not a string and is instead %T", rule.Value)
}
case operatorPattern, operatorNotPattern:
if pattern, ok := rule.Value.(*regexp.Regexp); ok {
return &AccessControlQueryMatcherPattern{key: rule.Key, pattern: pattern, match: rule.Operator == operatorPattern}, nil
} else {
return nil, fmt.Errorf("rule value is not a *regexp.Regexp and is instead %T", rule.Value)
}
default:
return nil, fmt.Errorf("invalid operator: %s", rule.Operator)
}
}
// AccessControlQueryMatcherEqual is a rule type that checks the equality of a query parameter.
type AccessControlQueryMatcherEqual struct {
key, value string
equal bool
}
// IsMatch returns true if this rule matches the object.
func (acl AccessControlQueryMatcherEqual) IsMatch(object Object) (isMatch bool) {
switch {
case acl.equal:
return object.URL.Query().Get(acl.key) == acl.value
default:
return object.URL.Query().Get(acl.key) != acl.value
}
}
// AccessControlQueryMatcherPresent is a rule type that checks the presence of a query parameter.
type AccessControlQueryMatcherPresent struct {
key string
present bool
}
// IsMatch returns true if this rule matches the object.
func (acl AccessControlQueryMatcherPresent) IsMatch(object Object) (isMatch bool) {
switch {
case acl.present:
return object.URL.Query().Has(acl.key)
default:
return !object.URL.Query().Has(acl.key)
}
}
// AccessControlQueryMatcherPattern is a rule type that checks a query parameter against regex.
type AccessControlQueryMatcherPattern struct {
key string
pattern *regexp.Regexp
match bool
}
// IsMatch returns true if this rule matches the object.
func (acl AccessControlQueryMatcherPattern) IsMatch(object Object) (isMatch bool) {
switch {
case acl.match:
return acl.pattern.MatchString(object.URL.Query().Get(acl.key))
default:
return !acl.pattern.MatchString(object.URL.Query().Get(acl.key))
}
}
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