/
apk.go
93 lines (80 loc) · 2.64 KB
/
apk.go
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//go:build e2e
// +build e2e
//
// Copyright 2021 The Sigstore Authors.
//
// 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 e2e
import (
"archive/tar"
"bytes"
"compress/gzip"
"crypto"
crand "crypto/rand"
"crypto/rsa"
"crypto/sha1"
"crypto/sha256"
"encoding/hex"
"io"
"io/ioutil"
"strings"
"testing"
)
func createSignedApk(t *testing.T, artifactPath string) {
t.Helper()
data := randomData(t, 100)
dataTarBuf := bytes.Buffer{}
dataTar := tar.NewWriter(&dataTarBuf)
dataTar.WriteHeader(&tar.Header{Name: "random.txt", Size: int64(len(data))})
dataTar.Write(data)
dataTar.Close()
dataTGZBuf := bytes.Buffer{}
dataGZ, _ := gzip.NewWriterLevel(&dataTGZBuf, gzip.BestCompression)
dataGZ.Write(dataTarBuf.Bytes())
dataGZ.Close()
datahash := sha256.Sum256(dataTGZBuf.Bytes())
ctlData := strings.Builder{}
ctlData.WriteString("name = " + randomSuffix(16))
ctlData.WriteRune('\n')
ctlData.WriteString("datahash = " + hex.EncodeToString(datahash[:]))
ctlData.WriteRune('\n')
ctlTarBuf := bytes.Buffer{}
ctlTar := tar.NewWriter(&ctlTarBuf)
ctlTar.WriteHeader(&tar.Header{Name: ".PKGINFO", Size: int64(ctlData.Len())})
ctlTar.Write([]byte(ctlData.String()))
ctlTar.Flush()
// do not close so uncompressed stream appears as contiguous tar archive
ctlTGZBuf := bytes.Buffer{}
ctlGZ, _ := gzip.NewWriterLevel(&ctlTGZBuf, gzip.BestCompression)
ctlGZ.Write(ctlTarBuf.Bytes())
ctlGZ.Close()
sha1sum := sha1.Sum(ctlTGZBuf.Bytes())
sig, _ := rsa.SignPKCS1v15(crand.Reader, certPrivateKey, crypto.SHA1, sha1sum[:])
sigTarBuf := bytes.Buffer{}
sigTar := tar.NewWriter(&sigTarBuf)
sigTar.WriteHeader(&tar.Header{Name: ".SIGN.RSA.fixed.pub", Size: int64(len(sig))})
sigTar.Write(sig)
sigTar.Flush()
// do not close so uncompressed stream appears as contiguous tar archive
sigTGZBuf := bytes.Buffer{}
sigGZ, _ := gzip.NewWriterLevel(&sigTGZBuf, gzip.BestCompression)
sigGZ.Write(sigTarBuf.Bytes())
sigGZ.Close()
apkBuf := bytes.Buffer{}
if _, err := io.Copy(&apkBuf, io.MultiReader(&sigTGZBuf, &ctlTGZBuf, &dataTGZBuf)); err != nil {
t.Fatal(err)
}
if err := ioutil.WriteFile(artifactPath, apkBuf.Bytes(), 777); err != nil {
t.Fatal(err)
}
}