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// Copyright (C) 2018 The Android Open Source Project
//
// 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 apex
import (
"fmt"
"io"
"strings"
"android/soong/android"
"github.com/google/blueprint/proptools"
)
var String = proptools.String
func init() {
android.RegisterModuleType("apex_key", apexKeyFactory)
android.RegisterSingletonType("apex_keys_text", apexKeysTextFactory)
}
type apexKey struct {
android.ModuleBase
properties apexKeyProperties
public_key_file android.Path
private_key_file android.Path
keyName string
}
type apexKeyProperties struct {
// Path to the public key file in avbpubkey format. Installed to the device.
// Base name of the file is used as the ID for the key.
Public_key *string
// Path to the private key file in pem format. Used to sign APEXs.
Private_key *string
// Whether this key is installable to one of the partitions. Defualt: true.
Installable *bool
}
func apexKeyFactory() android.Module {
module := &apexKey{}
module.AddProperties(&module.properties)
android.InitAndroidModule(module)
return module
}
func (m *apexKey) installable() bool {
return m.properties.Installable == nil || proptools.Bool(m.properties.Installable)
}
func (m *apexKey) GenerateAndroidBuildActions(ctx android.ModuleContext) {
m.public_key_file = ctx.Config().ApexKeyDir(ctx).Join(ctx, String(m.properties.Public_key))
m.private_key_file = ctx.Config().ApexKeyDir(ctx).Join(ctx, String(m.properties.Private_key))
// If not found, fall back to the local key pairs
if !android.ExistentPathForSource(ctx, m.public_key_file.String()).Valid() {
m.public_key_file = android.PathForModuleSrc(ctx, String(m.properties.Public_key))
}
if !android.ExistentPathForSource(ctx, m.private_key_file.String()).Valid() {
m.private_key_file = android.PathForModuleSrc(ctx, String(m.properties.Private_key))
}
pubKeyName := m.public_key_file.Base()[0 : len(m.public_key_file.Base())-len(m.public_key_file.Ext())]
privKeyName := m.private_key_file.Base()[0 : len(m.private_key_file.Base())-len(m.private_key_file.Ext())]
if pubKeyName != privKeyName {
ctx.ModuleErrorf("public_key %q (keyname:%q) and private_key %q (keyname:%q) do not have same keyname",
m.public_key_file.String(), pubKeyName, m.private_key_file, privKeyName)
return
}
m.keyName = pubKeyName
if m.installable() {
ctx.InstallFile(android.PathForModuleInstall(ctx, "etc/security/apex"), m.keyName, m.public_key_file)
}
}
func (m *apexKey) AndroidMk() android.AndroidMkData {
return android.AndroidMkData{
Class: "ETC",
OutputFile: android.OptionalPathForPath(m.public_key_file),
Extra: []android.AndroidMkExtraFunc{
func(w io.Writer, outputFile android.Path) {
fmt.Fprintln(w, "LOCAL_MODULE_PATH :=", "$(TARGET_OUT)/etc/security/apex")
fmt.Fprintln(w, "LOCAL_INSTALLED_MODULE_STEM :=", m.keyName)
fmt.Fprintln(w, "LOCAL_UNINSTALLABLE_MODULE :=", !m.installable())
},
},
}
}
////////////////////////////////////////////////////////////////////////
// apex_keys_text
type apexKeysText struct {
output android.OutputPath
}
func (s *apexKeysText) GenerateBuildActions(ctx android.SingletonContext) {
s.output = android.PathForOutput(ctx, "apexkeys.txt")
var filecontent strings.Builder
ctx.VisitAllModules(func(module android.Module) {
if m, ok := module.(android.Module); ok && !m.Enabled() {
return
}
if m, ok := module.(*apexBundle); ok {
fmt.Fprintf(&filecontent,
"name=%q public_key=%q private_key=%q container_certificate=%q container_private_key=%q\\n",
m.Name()+".apex",
m.public_key_file.String(),
m.private_key_file.String(),
m.container_certificate_file.String(),
m.container_private_key_file.String())
}
})
ctx.Build(pctx, android.BuildParams{
Rule: android.WriteFile,
Description: "apexkeys.txt",
Output: s.output,
Args: map[string]string{
"content": filecontent.String(),
},
})
}
func apexKeysTextFactory() android.Singleton {
return &apexKeysText{}
}
func (s *apexKeysText) MakeVars(ctx android.MakeVarsContext) {
ctx.Strict("SOONG_APEX_KEYS_FILE", s.output.String())
}
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