/
aspect_bundle.go
115 lines (95 loc) · 3 KB
/
aspect_bundle.go
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// -*- Mode: Go; indent-tabs-mode: t -*-
/*
* Copyright (C) 2024 Canonical Ltd
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 3 as
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
*/
package asserts
import (
"encoding/json"
"fmt"
"regexp"
"time"
"github.com/snapcore/snapd/aspects"
)
// AspectBundle holds an aspect-bundle assertion, which is a definition by an
// account of access aspects ("views") and a storage schema for a set of
// related configuration options under the purview of the account.
type AspectBundle struct {
assertionBase
bundle *aspects.Bundle
timestamp time.Time
}
// AccountID returns the identifier of the account that signed this assertion.
func (ab *AspectBundle) AccountID() string {
return ab.HeaderString("account-id")
}
// Name returns the name for the bundle.
func (ab *AspectBundle) Name() string {
return ab.HeaderString("name")
}
// Bundle returns a aspects.Bundle implementing the aspect bundle configuration
// handling.
func (ab *AspectBundle) Bundle() *aspects.Bundle {
return ab.bundle
}
var (
validAspectBundleName = regexp.MustCompile("^[a-z0-9](?:-?[a-z0-9])*$")
)
func assembleAspectBundle(assert assertionBase) (Assertion, error) {
authorityID := assert.AuthorityID()
accountID := assert.HeaderString("account-id")
if accountID != authorityID {
return nil, fmt.Errorf("authority-id and account-id must match, aspect-bundle assertions are expected to be signed by the issuer account: %q != %q", authorityID, accountID)
}
name, err := checkStringMatches(assert.headers, "name", validAspectBundleName)
if err != nil {
return nil, err
}
aspectsMap, err := checkMap(assert.headers, "aspects")
if err != nil {
return nil, err
}
if aspectsMap == nil {
return nil, fmt.Errorf(`"aspects" stanza is mandatory`)
}
if _, err := checkOptionalString(assert.headers, "summary"); err != nil {
return nil, err
}
var bodyMap map[string]json.RawMessage
if err := json.Unmarshal(assert.body, &bodyMap); err != nil {
return nil, err
}
schemaRaw, ok := bodyMap["storage"]
if !ok {
return nil, fmt.Errorf(`body must contain a "storage" stanza`)
}
schema, err := aspects.ParseSchema(schemaRaw)
if err != nil {
return nil, fmt.Errorf(`invalid schema: %w`, err)
}
bundle, err := aspects.NewBundle(accountID, name, aspectsMap, schema)
if err != nil {
return nil, err
}
timestamp, err := checkRFC3339Date(assert.headers, "timestamp")
if err != nil {
return nil, err
}
return &AspectBundle{
assertionBase: assert,
bundle: bundle,
timestamp: timestamp,
}, nil
}