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// -*- Mode: Go; indent-tabs-mode: t -*-
/*
* Copyright (C) 2014-2021 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"
"io/ioutil"
"github.com/jessevdk/go-flags"
"gitee.com/mysnapcore/mysnapd/asserts/signtool"
"gitee.com/mysnapcore/mysnapd/i18n"
)
var shortSignHelp = i18n.G("Sign an assertion")
var longSignHelp = i18n.G(`
The sign command signs an assertion using the specified key, using the
input for headers from a JSON mapping provided through stdin. The body
of the assertion can be specified through a "body" pseudo-header.
`)
type cmdSign struct {
Positional struct {
Filename flags.Filename
} `positional-args:"yes"`
KeyName keyName `short:"k" default:"default"`
}
func init() {
cmd := addCommand("sign", shortSignHelp, longSignHelp, func() flags.Commander {
return &cmdSign{}
}, map[string]string{
// TRANSLATORS: This should not start with a lowercase letter.
"k": i18n.G("Name of the key to use, otherwise use the default key"),
}, []argDesc{{
// TRANSLATORS: This needs to begin with < and end with >
name: i18n.G("<filename>"),
// TRANSLATORS: This should not start with a lowercase letter.
desc: i18n.G("File to sign (defaults to stdin)"),
}})
cmd.hidden = true
cmd.completeHidden = true
}
func (x *cmdSign) Execute(args []string) error {
if len(args) > 0 {
return ErrExtraArgs
}
useStdin := x.Positional.Filename == "" || x.Positional.Filename == "-"
var (
statement []byte
err error
)
if !useStdin {
statement, err = ioutil.ReadFile(string(x.Positional.Filename))
} else {
statement, err = ioutil.ReadAll(Stdin)
}
if err != nil {
return fmt.Errorf(i18n.G("cannot read assertion input: %v"), err)
}
keypairMgr, err := signtool.GetKeypairManager()
if err != nil {
return err
}
privKey, err := keypairMgr.GetByName(string(x.KeyName))
if err != nil {
// TRANSLATORS: %q is the key name, %v the error message
return fmt.Errorf(i18n.G("cannot use %q key: %v"), x.KeyName, err)
}
signOpts := signtool.Options{
KeyID: privKey.PublicKey().ID(),
Statement: statement,
}
encodedAssert, err := signtool.Sign(&signOpts, keypairMgr)
if err != nil {
return err
}
_, err = Stdout.Write(encodedAssert)
if err != nil {
return err
}
return nil
}
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