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verify fingerprint of calling app

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This commit is contained in:
Benjamin Halko 2023-09-27 14:17:29 -07:00
parent 02822f4b38
commit 7559c7b67e
No known key found for this signature in database
GPG key ID: 790C70040EB331A0
1 changed files with 41 additions and 3 deletions
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44
android/app/src/main/kotlin/app/revanced/manager/flutter/ExportSettingsActivity.kt
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@ -3,17 +3,56 @@ package app.revanced.manager.flutter
import android.app.Activity
import android.content.Context
import android.content.Intent
import android.content.pm.PackageInfo
import android.content.pm.PackageManager
import android.os.Bundle
import android.util.Base64
import org.json.JSONObject
import java.io.ByteArrayInputStream
import java.io.File
import android.util.Log
import java.security.cert.CertificateFactory
import java.security.cert.X509Certificate
import java.security.MessageDigest
class ExportSettingsActivity : Activity() {
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
val composeFingerprint = ""
// Get the package name of the app that started the activity
val packageName = getCallingPackage()!!
// Get the signature of the app that matches the package name
val packageInfo = packageManager.getPackageInfo(packageName, PackageManager.GET_SIGNATURES)
val signatures = packageInfo.signatures
// Loop through each signature and print its properties
for (signature in signatures) {
// Get the raw certificate data
val rawCert = signature.toByteArray()
// Generate an X509Certificate from the data
val certFactory = CertificateFactory.getInstance("X509")
val x509Cert = certFactory.generateCertificate(ByteArrayInputStream(rawCert)) as X509Certificate
// Get the SHA256 fingerprint
val fingerprint = MessageDigest.getInstance("SHA256").digest(x509Cert.encoded).joinToString("") {
"%02x".format(it)
}
if (fingerprint == composeFingerprint) {
sendData()
}
}
// Send data back
val resultIntent = Intent()
setResult(Activity.RESULT_CANCELED)
finish()
}
fun sendData() {
// Create JSON Object
val json = JSONObject()
// Default Data
@ -47,7 +86,6 @@ class ExportSettingsActivity : Activity() {
}
// Send data back
Log.e("ExportSettingsActivity", json.toString())
val resultIntent = Intent()
resultIntent.putExtra("data", json.toString())
setResult(Activity.RESULT_OK, resultIntent)