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Improve keygen for signing repackaged manager

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This commit is contained in:
topjohnwu 2019-10-24 13:04:15 -04:00
parent 9d948f2c2b
commit 97a691ce2f
2 changed files with 16 additions and 11 deletions
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21
app/src/main/java/com/topjohnwu/magisk/utils/Keygen.kt
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@ -33,10 +33,14 @@ private interface CertKeyProvider {
}
@Suppress("DEPRECATION")
object Keygen: CertKeyProvider {
private const val ALIAS = "magisk"
private val PASSWORD = "magisk".toCharArray()
private const val TESTKEY_CERT = "61ed377e85d386a8dfee6b864bd85b0bfaa5af81"
class Keygen: CertKeyProvider {
companion object {
private const val ALIAS = "magisk"
private val PASSWORD = "magisk".toCharArray()
private const val TESTKEY_CERT = "61ed377e85d386a8dfee6b864bd85b0bfaa5af81"
private const val DNAME = "CN=Android, OU=Android, O=Google Inc., L=Mountain View, ST=California, C=US"
}
private val start get() = Calendar.getInstance()
private val end get() = Calendar.getInstance().apply {
@ -48,7 +52,7 @@ object Keygen: CertKeyProvider {
private val provider: CertKeyProvider
class KeyStoreProvider : CertKeyProvider {
inner class KeyStoreProvider : CertKeyProvider {
private val ks by lazy { init() }
override val cert by lazy { ks.getCertificate(ALIAS) as X509Certificate }
override val key by lazy { ks.getKey(ALIAS, PASSWORD) as PrivateKey }
@ -113,9 +117,9 @@ object Keygen: CertKeyProvider {
// Generate new private key and certificate
val kp = KeyPairGenerator.getInstance("RSA").apply { initialize(2048) }.genKeyPair()
val dn = X500Name("CN=Magisk")
val builder = JcaX509v3CertificateBuilder(dn,
BigInteger.valueOf(start.timeInMillis), start.time, end.time, dn, kp.public)
val dname = X500Name(DNAME)
val builder = JcaX509v3CertificateBuilder(dname,
BigInteger.valueOf(start.timeInMillis), start.time, end.time, dname, kp.public)
val signer = JcaContentSignerBuilder("SHA256WithRSA").build(kp.private)
val cert = JcaX509CertificateConverter().getCertificate(builder.build(signer))
@ -129,5 +133,4 @@ object Keygen: CertKeyProvider {
return ks
}
}

6
app/src/main/java/com/topjohnwu/magisk/utils/PatchAPK.kt
View File

@ -94,9 +94,10 @@ object PatchAPK {
context.packageCodePath
}
// Generate a new app with random package name
// Generate a new random package name and signature
val repack = File(context.cacheDir, "patched.apk")
val pkg = genPackageName("com.", BuildConfig.APPLICATION_ID.length)
Config.keyStoreRaw = ""
if (!patch(src, repack.path, pkg, label))
return false
@ -127,7 +128,8 @@ object PatchAPK {
// Write apk changes
jar.getOutputStream(je).write(xml)
SignAPK.sign(Keygen.cert, Keygen.key, jar, FileOutputStream(out).buffered())
val keys = Keygen()
SignAPK.sign(keys.cert, keys.key, jar, FileOutputStream(out).buffered())
} catch (e: Exception) {
Timber.e(e)
return false