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// -*- Mode: Go; indent-tabs-mode: t -*-
/*
* Copyright (C) 2017 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 main
import (
"fmt"
"os"
"path/filepath"
"strings"
"github.com/snapcore/snapd/asserts"
"github.com/snapcore/snapd/asserts/snapasserts"
"github.com/snapcore/snapd/asserts/sysdb"
"github.com/snapcore/snapd/image"
)
func fetchSnapAssertions(tsto *image.ToolingStore, snapPath string) error {
db, err := asserts.OpenDatabase(&asserts.DatabaseConfig{
Backstore: asserts.NewMemoryBackstore(),
Trusted: sysdb.Trusted(),
})
if err != nil {
return err
}
assertPath := strings.TrimSuffix(snapPath, filepath.Ext(snapPath)) + ".assert"
w, err := os.Create(assertPath)
if err != nil {
return fmt.Errorf("cannot create assertions file: %v", err)
}
defer w.Close()
encoder := asserts.NewEncoder(w)
save := func(a asserts.Assertion) error {
return encoder.Encode(a)
}
f := tsto.AssertionFetcher(db, save)
sha3_384, _, err := asserts.SnapFileSHA3_384(snapPath)
if err != nil {
return err
}
// this assumes series "16"
return snapasserts.FetchSnapAssertions(f, sha3_384)
}
func main() {
tsto, err := image.NewToolingStore()
if err != nil {
fmt.Fprintf(os.Stderr, "%v\n", err)
os.Exit(1)
}
if len(os.Args) < 2 {
fmt.Fprintf(os.Stderr, "must give a snap\n")
os.Exit(1)
}
snapPath := os.Args[1]
fmt.Fprintf(os.Stderr, "Fetching assertions for %q\n", snapPath)
err = fetchSnapAssertions(tsto, snapPath)
if err != nil {
fmt.Fprintf(os.Stderr, "cannot fetch assertions: %v\n", err)
os.Exit(1)
}
}
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