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/*
* Copyright © 2014-2021 The Android Password Store Authors. All Rights Reserved.
* SPDX-License-Identifier: GPL-3.0-only
*/
package dev.msfjarvis.aps.ui.crypto
import android.content.Intent
import android.os.Bundle
import android.view.Menu
import android.view.MenuItem
import androidx.lifecycle.lifecycleScope
import dagger.hilt.android.AndroidEntryPoint
import dev.msfjarvis.aps.R
import dev.msfjarvis.aps.data.passfile.PasswordEntry
import dev.msfjarvis.aps.data.password.FieldItem
import dev.msfjarvis.aps.databinding.DecryptLayoutBinding
import dev.msfjarvis.aps.injection.crypto.CryptoSet
import dev.msfjarvis.aps.injection.password.PasswordEntryFactory
import dev.msfjarvis.aps.ui.adapters.FieldItemAdapter
import dev.msfjarvis.aps.util.extensions.unsafeLazy
import dev.msfjarvis.aps.util.extensions.viewBinding
import java.io.ByteArrayOutputStream
import java.io.File
import javax.inject.Inject
import kotlin.time.Duration
import kotlin.time.ExperimentalTime
import kotlinx.coroutines.Dispatchers
import kotlinx.coroutines.delay
import kotlinx.coroutines.flow.collect
import kotlinx.coroutines.launch
import kotlinx.coroutines.withContext
@AndroidEntryPoint
class DecryptActivityV2 : BasePgpActivity() {
private val binding by viewBinding(DecryptLayoutBinding::inflate)
@Inject lateinit var passwordEntryFactory: PasswordEntryFactory
@Inject lateinit var cryptos: CryptoSet
private val relativeParentPath by unsafeLazy { getParentPath(fullPath, repoPath) }
private var passwordEntry: PasswordEntry? = null
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
supportActionBar?.setDisplayHomeAsUpEnabled(true)
title = name
with(binding) {
setContentView(root)
passwordCategory.text = relativeParentPath
passwordFile.text = name
passwordFile.setOnLongClickListener {
copyTextToClipboard(name)
true
}
}
decrypt()
}
override fun onCreateOptionsMenu(menu: Menu): Boolean {
menuInflater.inflate(R.menu.pgp_handler, menu)
passwordEntry?.let { entry ->
menu.findItem(R.id.edit_password).isVisible = true
if (!entry.password.isNullOrBlank()) {
menu.findItem(R.id.share_password_as_plaintext).isVisible = true
menu.findItem(R.id.copy_password).isVisible = true
}
}
return true
}
override fun onOptionsItemSelected(item: MenuItem): Boolean {
when (item.itemId) {
android.R.id.home -> onBackPressed()
R.id.edit_password -> editPassword()
R.id.share_password_as_plaintext -> shareAsPlaintext()
R.id.copy_password -> copyPasswordToClipboard(passwordEntry?.password)
else -> return super.onOptionsItemSelected(item)
}
return true
}
/**
* Automatically finishes the activity 60 seconds after decryption succeeded to prevent
* information leaks from stale activities.
*/
@OptIn(ExperimentalTime::class)
private fun startAutoDismissTimer() {
lifecycleScope.launch {
delay(Duration.seconds(60))
finish()
}
}
/**
* Edit the current password and hide all the fields populated by encrypted data so that when the
* result triggers they can be repopulated with new data.
*/
private fun editPassword() {
val intent = Intent(this, PasswordCreationActivityV2::class.java)
intent.putExtra("FILE_PATH", relativeParentPath)
intent.putExtra("REPO_PATH", repoPath)
intent.putExtra(PasswordCreationActivityV2.EXTRA_FILE_NAME, name)
intent.putExtra(PasswordCreationActivityV2.EXTRA_PASSWORD, passwordEntry?.password)
intent.putExtra(
PasswordCreationActivityV2.EXTRA_EXTRA_CONTENT,
passwordEntry?.extraContentString
)
intent.putExtra(PasswordCreationActivityV2.EXTRA_EDITING, true)
startActivity(intent)
finish()
}
private fun shareAsPlaintext() {
val sendIntent =
Intent().apply {
action = Intent.ACTION_SEND
putExtra(Intent.EXTRA_TEXT, passwordEntry?.password)
type = "text/plain"
}
// Always show a picker to give the user a chance to cancel
startActivity(
Intent.createChooser(sendIntent, resources.getText(R.string.send_plaintext_password_to))
)
}
private fun decrypt() {
lifecycleScope.launch {
// TODO(msfjarvis): native methods are fallible, add error handling once out of testing
val message = withContext(Dispatchers.IO) { File(fullPath).inputStream() }
val result =
withContext(Dispatchers.IO) {
val crypto = cryptos.first { it.canHandle(fullPath) }
val outputStream = ByteArrayOutputStream()
crypto.decrypt(
PRIV_KEY,
PASS,
message,
outputStream,
)
outputStream
}
startAutoDismissTimer()
val entry = passwordEntryFactory.create(lifecycleScope, result.toByteArray())
passwordEntry = entry
invalidateOptionsMenu()
val items = arrayListOf<FieldItem>()
val adapter = FieldItemAdapter(emptyList(), true) { text -> copyTextToClipboard(text) }
if (!entry.password.isNullOrBlank()) {
items.add(FieldItem.createPasswordField(entry.password!!))
}
if (entry.hasTotp()) {
lifecycleScope.launch {
items.add(FieldItem.createOtpField(entry.totp.value))
entry.totp.collect { code ->
withContext(Dispatchers.Main) { adapter.updateOTPCode(code) }
}
}
}
if (!entry.username.isNullOrBlank()) {
items.add(FieldItem.createUsernameField(entry.username!!))
}
entry.extraContent.forEach { (key, value) ->
items.add(FieldItem(key, value, FieldItem.ActionType.COPY))
}
binding.recyclerView.adapter = adapter
adapter.updateItems(items)
}
}
companion object {
// TODO(msfjarvis): source these from storage and user input
const val PRIV_KEY = ""
const val PASS = ""
}
}
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