1 files changed, 202 insertions, 0 deletions
diff --git a/app/src/main/java/com/zeapo/pwdstore/crypto/DecryptActivity.kt b/app/src/main/java/com/zeapo/pwdstore/crypto/DecryptActivity.kt
new file mode 100644
index 00000000..b7d7adcd
--- /dev/null
+++ b/app/src/main/java/com/zeapo/pwdstore/crypto/DecryptActivity.kt
@@ -0,0 +1,202 @@
+/*
+ * 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.StartActivityForResult
+import androidx.activity.result.contract.ActivityResultContracts.StartIntentSenderForResult
+import androidx.lifecycle.lifecycleScope
+import com.github.ajalt.timberkt.e
+import com.zeapo.pwdstore.PasswordEntry
+import com.zeapo.pwdstore.R
+import com.zeapo.pwdstore.databinding.DecryptLayoutBinding
+import com.zeapo.pwdstore.utils.viewBinding
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.launch
+import me.msfjarvis.openpgpktx.util.OpenPgpApi
+import me.msfjarvis.openpgpktx.util.OpenPgpServiceConnection
+import org.openintents.openpgp.IOpenPgpService2
+import java.io.ByteArrayOutputStream
+import java.io.File
+
+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()
+            }
+        }
+    }
+
+    private val openKeychainResult = registerForActivityResult(StartActivityForResult()) {
+        decryptAndVerify()
+    }
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        bindToOpenKeychain(this, openKeychainResult)
+        title = name
+        with(binding) {
+            setContentView(root)
+            passwordCategory.text = relativeParentPath
+            passwordFile.text = name
+            passwordFile.setOnLongClickListener {
+                copyTextToClipboard(name)
+                true
+            }
+            try {
+                passwordLastChanged.text = resources.getString(R.string.last_changed, lastChangedString)
+            } catch (e: RuntimeException) {
+                passwordLastChanged.visibility = View.GONE
+            }
+        }
+    }
+
+    override fun onCreateOptionsMenu(menu: Menu?): Boolean {
+        menuInflater.inflate(R.menu.pgp_handler, menu)
+        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)))
+    }
+
+    private fun decryptAndVerify(receivedIntent: Intent? = null) {
+        if (api == null) {
+            bindToOpenKeychain(this, openKeychainResult)
+            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 -> {
+                        try {
+                            val showPassword = settings.getBoolean("show_password", true)
+                            val showExtraContent = settings.getBoolean("show_extra_content", true)
+                            val monoTypeface = Typeface.createFromAsset(assets, "fonts/sourcecodepro.ttf")
+                            val entry = PasswordEntry(outputStream)
+
+                            passwordEntry = entry
+
+                            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()) {
+                                    extraContentContainer.visibility = View.VISIBLE
+                                    extraContent.typeface = monoTypeface
+                                    extraContent.setText(entry.extraContentWithoutUsername)
+                                    if (!showExtraContent) {
+                                        extraContent.transformationMethod = PasswordTransformationMethod.getInstance()
+                                    }
+                                    extraContentContainer.setOnClickListener { copyTextToClipboard(entry.extraContentWithoutUsername) }
+                                    extraContent.setOnClickListener { copyTextToClipboard(entry.extraContentWithoutUsername) }
+
+                                    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 (settings.getBoolean("copy_on_decrypt", true)) {
+                                copyPasswordToClipboard(entry.password)
+                            }
+                        } catch (e: Exception) {
+                            e(e)
+                        }
+                    }
+                    OpenPgpApi.RESULT_CODE_USER_INTERACTION_REQUIRED -> {
+                        val sender = getUserInteractionRequestIntent(result)
+                        userInteractionRequiredResult.launch(IntentSenderRequest.Builder(sender).build())
+                    }
+                    OpenPgpApi.RESULT_CODE_ERROR -> handleError(result)
+                }
+            }
+        }
+    }
+}