forked from sassoftware/relic
/
signer.go
67 lines (57 loc) · 1.61 KB
/
signer.go
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//
// Copyright (c) SAS Institute Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//
package apk
import (
"io"
"github.com/pkg/errors"
"github.com/sassoftware/relic/lib/certloader"
"github.com/sassoftware/relic/lib/magic"
"github.com/sassoftware/relic/signers"
"github.com/sassoftware/relic/signers/zipbased"
)
// Sign Android packages
var ApkSigner = &signers.Signer{
Name: "apk",
Magic: magic.FileTypeAPK,
CertTypes: signers.CertTypeX509,
Transform: zipbased.Transform,
Sign: sign,
Verify: verify,
}
const (
sigMagic = "APK Sig Block 42"
sigApkV2 = 0x7109871a
directoryEndSignature = 0x06054b50
directoryEndLen = 22
)
var (
errMalformed = errors.New("malformed APK signing block")
errTruncated = errors.New("truncated APK signing block sequence")
)
func init() {
signers.Register(ApkSigner)
}
func sign(r io.Reader, cert *certloader.Certificate, opts signers.SignOpts) ([]byte, error) {
digest, err := digestApkStream(r, opts.Hash)
if err != nil {
return nil, err
}
patchset, err := digest.Sign(cert)
if err != nil {
return nil, err
}
return opts.SetBinPatch(patchset)
}