132 lines
3.1 KiB
Go
132 lines
3.1 KiB
Go
// Copyright (c) 2026 Probo Inc <hello@probo.com>.
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//
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// Permission to use, copy, modify, and/or distribute this software for any
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// purpose with or without fee is hereby granted, provided that the above
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// copyright notice and this permission notice appear in all copies.
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//
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// THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
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// REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
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// AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
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// INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
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// LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
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// OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
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// PERFORMANCE OF THIS SOFTWARE.
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package oauth2scope
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import (
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"cmp"
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"fmt"
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"maps"
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"slices"
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"sync"
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"go.probo.inc/probo/pkg/coredata"
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)
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type Registry struct {
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mu sync.RWMutex
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scopeActions map[coredata.OAuth2Scope][]string
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invertedIndex map[string][]coredata.OAuth2Scope
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}
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func NewRegistry() *Registry {
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return &Registry{
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scopeActions: make(map[coredata.OAuth2Scope][]string),
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}
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}
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func (r *Registry) Register(mappings map[coredata.OAuth2Scope][]string) *Registry {
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r.mu.Lock()
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defer r.mu.Unlock()
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for scope, actions := range mappings {
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if len(actions) == 0 {
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continue
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}
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r.scopeActions[scope] = append(r.scopeActions[scope], actions...)
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}
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r.rebuildInvertedIndex()
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return r
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}
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func (r *Registry) RegisteredScopes() []coredata.OAuth2Scope {
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r.mu.RLock()
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defer r.mu.RUnlock()
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return sortedScopes(slices.Collect(maps.Keys(r.scopeActions)))
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}
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func (r *Registry) AllWriteScopes() []coredata.OAuth2Scope {
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r.mu.RLock()
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defer r.mu.RUnlock()
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writeScopes := make([]coredata.OAuth2Scope, 0, len(r.scopeActions))
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for scope := range r.scopeActions {
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if !scope.IsRead() {
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writeScopes = append(writeScopes, scope)
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}
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}
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return sortedScopes(writeScopes)
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}
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func (r *Registry) Allows(tokenScopes coredata.OAuth2Scopes, action string) bool {
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r.mu.RLock()
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defer r.mu.RUnlock()
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grantingScopes, ok := r.invertedIndex[action]
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if !ok {
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return false
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}
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return slices.ContainsFunc(grantingScopes, tokenScopes.Contains)
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}
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func (r *Registry) ScopesForAction(action string) []coredata.OAuth2Scope {
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r.mu.RLock()
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defer r.mu.RUnlock()
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return sortedScopes(r.invertedIndex[action])
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}
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func (r *Registry) ValidateScopes(scopes coredata.OAuth2Scopes) error {
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r.mu.RLock()
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defer r.mu.RUnlock()
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for _, scope := range scopes {
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if _, ok := r.scopeActions[scope]; !ok {
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return fmt.Errorf("invalid scope: %s", scope)
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}
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}
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return nil
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}
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func (r *Registry) rebuildInvertedIndex() {
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invertedIndex := make(map[string][]coredata.OAuth2Scope, len(r.scopeActions)*4)
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for scope, actions := range r.scopeActions {
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for _, action := range actions {
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invertedIndex[action] = append(invertedIndex[action], scope)
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}
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}
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r.invertedIndex = invertedIndex
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}
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func sortedScopes(scopes []coredata.OAuth2Scope) []coredata.OAuth2Scope {
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sorted := slices.Clone(scopes)
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slices.SortFunc(
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sorted,
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func(a, b coredata.OAuth2Scope) int {
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return cmp.Compare(string(a), string(b))
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},
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)
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return sorted
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}
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