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/*
* Copyright © 2014-2020 The Android Password Store Authors. All Rights Reserved.
* SPDX-License-Identifier: GPL-3.0-only
*/
package com.zeapo.pwdstore.crypto
import android.content.Intent
import android.graphics.Typeface
import android.os.Bundle
import android.text.method.PasswordTransformationMethod
import android.view.Menu
import android.view.MenuItem
import android.view.View
import androidx.activity.result.IntentSenderRequest
import androidx.activity.result.contract.ActivityResultContracts.StartIntentSenderForResult
import androidx.lifecycle.lifecycleScope
import com.github.ajalt.timberkt.e
import com.github.michaelbull.result.onFailure
import com.github.michaelbull.result.runCatching
import com.zeapo.pwdstore.R
import com.zeapo.pwdstore.databinding.DecryptLayoutBinding
import com.zeapo.pwdstore.model.PasswordEntry
import com.zeapo.pwdstore.utils.PreferenceKeys
import com.zeapo.pwdstore.utils.viewBinding
import java.io.ByteArrayOutputStream
import java.io.File
import kotlin.time.ExperimentalTime
import kotlin.time.seconds
import kotlinx.coroutines.Dispatchers
import kotlinx.coroutines.delay
import kotlinx.coroutines.launch
import kotlinx.coroutines.withContext
import me.msfjarvis.openpgpktx.util.OpenPgpApi
import me.msfjarvis.openpgpktx.util.OpenPgpServiceConnection
import org.openintents.openpgp.IOpenPgpService2
class DecryptActivity : BasePgpActivity(), OpenPgpServiceConnection.OnBound {
private val binding by viewBinding(DecryptLayoutBinding::inflate)
private val relativeParentPath by lazy { getParentPath(fullPath, repoPath) }
private var passwordEntry: PasswordEntry? = null
private val userInteractionRequiredResult = registerForActivityResult(StartIntentSenderForResult()) { result ->
if (result.data == null) {
setResult(RESULT_CANCELED, null)
finish()
return@registerForActivityResult
}
when (result.resultCode) {
RESULT_OK -> decryptAndVerify(result.data)
RESULT_CANCELED -> {
setResult(RESULT_CANCELED, result.data)
finish()
}
}
}
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
bindToOpenKeychain(this)
title = name
with(binding) {
setContentView(root)
passwordCategory.text = relativeParentPath
passwordFile.text = name
passwordFile.setOnLongClickListener {
copyTextToClipboard(name)
true
}
passwordLastChanged.run {
runCatching {
text = resources.getString(R.string.last_changed, lastChangedString)
}.onFailure {
visibility = View.GONE
}
}
}
}
override fun onCreateOptionsMenu(menu: Menu?): Boolean {
menuInflater.inflate(R.menu.pgp_handler, menu)
passwordEntry?.let { entry ->
if (menu != null) {
menu.findItem(R.id.edit_password).isVisible = true
if (entry.password.isNotEmpty()) {
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)
}
return super.onOptionsItemSelected(item)
}
override fun onBound(service: IOpenPgpService2) {
super.onBound(service)
decryptAndVerify()
}
override fun onError(e: Exception) {
e(e)
}
/**
* 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, PasswordCreationActivity::class.java)
intent.putExtra("FILE_PATH", relativeParentPath)
intent.putExtra("REPO_PATH", repoPath)
intent.putExtra(PasswordCreationActivity.EXTRA_FILE_NAME, name)
intent.putExtra(PasswordCreationActivity.EXTRA_PASSWORD, passwordEntry?.password)
intent.putExtra(PasswordCreationActivity.EXTRA_EXTRA_CONTENT, passwordEntry?.extraContent)
intent.putExtra(PasswordCreationActivity.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)))
}
@OptIn(ExperimentalTime::class)
private fun decryptAndVerify(receivedIntent: Intent? = null) {
if (api == null) {
bindToOpenKeychain(this)
return
}
val data = receivedIntent ?: Intent()
data.action = OpenPgpApi.ACTION_DECRYPT_VERIFY
val inputStream = File(fullPath).inputStream()
val outputStream = ByteArrayOutputStream()
lifecycleScope.launch(Dispatchers.IO) {
api?.executeApiAsync(data, inputStream, outputStream) { result ->
when (result?.getIntExtra(OpenPgpApi.RESULT_CODE, OpenPgpApi.RESULT_CODE_ERROR)) {
OpenPgpApi.RESULT_CODE_SUCCESS -> {
runCatching {
val showPassword = settings.getBoolean(PreferenceKeys.SHOW_PASSWORD, true)
val showExtraContent = settings.getBoolean(PreferenceKeys.SHOW_EXTRA_CONTENT, true)
val monoTypeface = Typeface.createFromAsset(assets, "fonts/sourcecodepro.ttf")
val entry = PasswordEntry(outputStream)
passwordEntry = entry
invalidateOptionsMenu()
with(binding) {
if (entry.password.isEmpty()) {
passwordTextContainer.visibility = View.GONE
} else {
passwordTextContainer.visibility = View.VISIBLE
passwordText.typeface = monoTypeface
passwordText.setText(entry.password)
if (!showPassword) {
passwordText.transformationMethod = PasswordTransformationMethod.getInstance()
}
passwordTextContainer.setOnClickListener { copyPasswordToClipboard(entry.password) }
passwordText.setOnClickListener { copyPasswordToClipboard(entry.password) }
}
if (entry.hasExtraContent()) {
if (entry.extraContentWithoutAuthData.isNotEmpty()) {
extraContentContainer.visibility = View.VISIBLE
extraContent.typeface = monoTypeface
extraContent.setText(entry.extraContentWithoutAuthData)
if (!showExtraContent) {
extraContent.transformationMethod = PasswordTransformationMethod.getInstance()
}
extraContentContainer.setOnClickListener { copyTextToClipboard(entry.extraContentWithoutAuthData) }
extraContent.setOnClickListener { copyTextToClipboard(entry.extraContentWithoutAuthData) }
}
if (entry.hasUsername()) {
usernameText.typeface = monoTypeface
usernameText.setText(entry.username)
usernameTextContainer.setEndIconOnClickListener { copyTextToClipboard(entry.username) }
usernameTextContainer.visibility = View.VISIBLE
} else {
usernameTextContainer.visibility = View.GONE
}
if (entry.hasTotp()) {
otpTextContainer.visibility = View.VISIBLE
otpTextContainer.setEndIconOnClickListener {
copyTextToClipboard(
otpText.text.toString(),
snackbarTextRes = R.string.clipboard_otp_copied_text
)
}
launch(Dispatchers.IO) {
// Calculate the actual remaining time for the first pass
// then return to the standard 30 second affair.
val remainingTime = entry.totpPeriod - (System.currentTimeMillis() % entry.totpPeriod)
withContext(Dispatchers.Main) {
otpText.setText(entry.calculateTotpCode()
?: "Error")
}
delay(remainingTime.seconds)
repeat(Int.MAX_VALUE) {
val code = entry.calculateTotpCode() ?: "Error"
withContext(Dispatchers.Main) {
otpText.setText(code)
}
delay(30.seconds)
}
}
}
}
}
if (settings.getBoolean(PreferenceKeys.COPY_ON_DECRYPT, false)) {
copyPasswordToClipboard(entry.password)
}
}.onFailure { e ->
e(e)
}
}
OpenPgpApi.RESULT_CODE_USER_INTERACTION_REQUIRED -> {
val sender = getUserInteractionRequestIntent(result)
userInteractionRequiredResult.launch(IntentSenderRequest.Builder(sender).build())
}
OpenPgpApi.RESULT_CODE_ERROR -> handleError(result)
}
}
}
}
}
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