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Revert "test: forward play certificate chain to key attestation app"

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This reverts commit 8de5a34243.
This commit is contained in:
5ec1cff
2024-07-12 15:17:39 +08:00
parent 8de5a34243
commit 680a36c499
2 changed files with 2 additions and 34 deletions
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25
service/src/main/java/io/github/a13e300/tricky_store/KeystoreInterceptor.kt
View File

@@ -3,7 +3,6 @@ package io.github.a13e300.tricky_store
import android.annotation.SuppressLint
import android.content.pm.IPackageManager
import android.os.IBinder
import android.os.IBinder.DeathRecipient
import android.os.Parcel
import android.os.ServiceManager
import android.system.keystore2.IKeystoreService
@@ -11,7 +10,6 @@ import android.system.keystore2.KeyEntryResponse
import io.github.a13e300.tricky_store.binder.BinderInterceptor
import io.github.a13e300.tricky_store.keystore.CertHack
import io.github.a13e300.tricky_store.keystore.Utils
import java.security.cert.Certificate
import kotlin.system.exitProcess
@SuppressLint("BlockedPrivateApi")
@@ -39,24 +37,12 @@ object KeystoreInterceptor : BinderInterceptor() {
Logger.d("intercept pre $target uid=$callingUid pid=$callingPid dataSz=${data.dataSize()}")
kotlin.runCatching {
val ps = getPm()?.getPackagesForUid(callingUid)
if (ps?.contains("com.google.android.gms") == true) {
gmsUid = callingUid
Logger.d("gms uid $gmsUid")
}
if (ps?.contains("io.github.vvb2060.keyattestation") == true) {
kaUid = callingUid
Logger.d("ka uid $kaUid")
}
if (ps?.any { it in Config.targetPackages } == true) return Continue
}.onFailure { Logger.e("failed to get packages", it) }
}
return Skip
}
private var playCertificates: Array<Certificate>? = null
private var gmsUid = 0
private var kaUid = 0
override fun onPostTransact(
target: IBinder,
code: Int,
@@ -75,14 +61,7 @@ object KeystoreInterceptor : BinderInterceptor() {
val response = reply.readTypedObject(KeyEntryResponse.CREATOR)
val chain = Utils.getCertificateChain(response)
if (chain != null) {
val newChain = if (callingUid == kaUid && playCertificates != null) {
Logger.d("send play certificates to ka!")
playCertificates
} else CertHack.engineGetCertificateChain(chain)
if (callingUid == gmsUid && CertHack.hasAttestation(chain)) {
Logger.d("get play certificates!")
playCertificates = newChain
}
val newChain = CertHack.engineGetCertificateChain(chain)
Utils.putCertificateChain(response, newChain)
p.writeNoException()
p.writeTypedObject(response, 0)
@@ -124,7 +103,7 @@ object KeystoreInterceptor : BinderInterceptor() {
return true
}
object Killer : DeathRecipient {
object Killer : IBinder.DeathRecipient {
override fun binderDied() {
Logger.d("keystore exit, daemon restart")
exitProcess(0)

11
service/src/main/java/io/github/a13e300/tricky_store/keystore/CertHack.java
View File

@@ -111,17 +111,6 @@ public final class CertHack {
}
}
public static boolean hasAttestation(Certificate[] caList) {
if (caList == null) return false;
try {
X509Certificate leaf = (X509Certificate) certificateFactory.generateCertificate(new ByteArrayInputStream(caList[0].getEncoded()));
byte[] bytes = leaf.getExtensionValue(OID.getId());
return bytes != null;
} catch (Throwable t) {
return false;
}
}
public static Certificate[] engineGetCertificateChain(Certificate[] caList) {
if (caList == null) throw new UnsupportedOperationException("caList is null!");
try {