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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.git
import android.annotation.SuppressLint
import android.app.Activity
import android.content.Intent
import android.view.LayoutInflater
import androidx.core.content.edit
import androidx.preference.PreferenceManager
import com.google.android.material.checkbox.MaterialCheckBox
import com.google.android.material.dialog.MaterialAlertDialogBuilder
import com.google.android.material.textfield.TextInputEditText
import com.zeapo.pwdstore.R
import com.zeapo.pwdstore.UserPreference
import com.zeapo.pwdstore.git.config.ConnectionMode
import com.zeapo.pwdstore.git.config.GitConfigSessionFactory
import com.zeapo.pwdstore.git.config.InteractivePasswordFinder
import com.zeapo.pwdstore.git.config.SshApiSessionFactory
import com.zeapo.pwdstore.git.config.SshAuthData
import com.zeapo.pwdstore.git.config.SshjSessionFactory
import com.zeapo.pwdstore.utils.PasswordRepository
import com.zeapo.pwdstore.utils.getEncryptedPrefs
import com.zeapo.pwdstore.utils.requestInputFocusOnView
import org.eclipse.jgit.api.GitCommand
import org.eclipse.jgit.lib.Repository
import org.eclipse.jgit.transport.SshSessionFactory
import org.eclipse.jgit.transport.UsernamePasswordCredentialsProvider
import java.io.File
import kotlin.coroutines.resume
/**
* Creates a new git operation
*
* @param fileDir the git working tree directory
* @param callingActivity the calling activity
*/
abstract class GitOperation(fileDir: File, internal val callingActivity: Activity) {
protected val repository: Repository? = PasswordRepository.getRepository(fileDir)
internal var provider: UsernamePasswordCredentialsProvider? = null
internal var command: GitCommand<*>? = null
private val sshKeyFile = callingActivity.filesDir.resolve(".ssh_key")
private val hostKeyFile = callingActivity.filesDir.resolve(".host_key")
/**
* Sets the authentication using user/pwd scheme
*
* @param username the username
* @param password the password
* @return the current object
*/
internal open fun setAuthentication(username: String, password: String): GitOperation {
SshSessionFactory.setInstance(GitConfigSessionFactory())
this.provider = UsernamePasswordCredentialsProvider(username, password)
return this
}
private fun withPublicKeyAuthentication(username: String, passphraseFinder: InteractivePasswordFinder): GitOperation {
val sessionFactory = SshjSessionFactory(username, SshAuthData.PublicKeyFile(sshKeyFile, passphraseFinder), hostKeyFile)
SshSessionFactory.setInstance(sessionFactory)
this.provider = null
return this
}
/**
* Sets the authentication using OpenKeystore scheme
*
* @param identity The identiy to use
* @return the current object
*/
private fun setAuthentication(username: String, identity: SshApiSessionFactory.ApiIdentity?): GitOperation {
SshSessionFactory.setInstance(SshApiSessionFactory(username, identity))
this.provider = null
return this
}
/**
* Executes the GitCommand in an async task
*/
abstract fun execute()
/**
* Executes the GitCommand in an async task after creating the authentication
*
* @param connectionMode the server-connection mode
* @param username the username
* @param identity the api identity to use for auth in OpenKeychain connection mode
*/
fun executeAfterAuthentication(
connectionMode: ConnectionMode,
username: String,
identity: SshApiSessionFactory.ApiIdentity?
) {
val encryptedSettings = callingActivity.applicationContext.getEncryptedPrefs("git_operation")
when (connectionMode) {
ConnectionMode.SshKey -> {
if (!sshKeyFile.exists()) {
MaterialAlertDialogBuilder(callingActivity)
.setMessage(callingActivity.resources.getString(R.string.ssh_preferences_dialog_text))
.setTitle(callingActivity.resources.getString(R.string.ssh_preferences_dialog_title))
.setPositiveButton(callingActivity.resources.getString(R.string.ssh_preferences_dialog_import)) { _, _ ->
try {
// Ask the UserPreference to provide us with the ssh-key
// onResult has to be handled by the callingActivity
val intent = Intent(callingActivity.applicationContext, UserPreference::class.java)
intent.putExtra("operation", "get_ssh_key")
callingActivity.startActivityForResult(intent, GET_SSH_KEY_FROM_CLONE)
} catch (e: Exception) {
println("Exception caught :(")
e.printStackTrace()
}
}
.setNegativeButton(callingActivity.resources.getString(R.string.ssh_preferences_dialog_generate)) { _, _ ->
try {
// Duplicated code
val intent = Intent(callingActivity.applicationContext, UserPreference::class.java)
intent.putExtra("operation", "make_ssh_key")
callingActivity.startActivityForResult(intent, GET_SSH_KEY_FROM_CLONE)
} catch (e: Exception) {
println("Exception caught :(")
e.printStackTrace()
}
}
.setNeutralButton(callingActivity.resources.getString(R.string.dialog_cancel)) { _, _ ->
// Finish the blank GitActivity so user doesn't have to press back
callingActivity.finish()
}.show()
} else {
withPublicKeyAuthentication(username, InteractivePasswordFinder { cont, isRetry ->
val storedPassphrase = encryptedSettings.getString("ssh_key_local_passphrase", null)
if (isRetry)
encryptedSettings.edit { putString("ssh_key_local_passphrase", null) }
if (storedPassphrase.isNullOrEmpty()) {
val layoutInflater = LayoutInflater.from(callingActivity)
@SuppressLint("InflateParams")
val dialogView = layoutInflater.inflate(R.layout.git_passphrase_layout, null)
val editPassphrase = dialogView.findViewById<TextInputEditText>(R.id.git_auth_passphrase)
val rememberPassphrase = dialogView.findViewById<MaterialCheckBox>(R.id.git_auth_remember_passphrase)
if (isRetry)
editPassphrase.error = callingActivity.resources.getString(R.string.git_operation_wrong_passphrase)
MaterialAlertDialogBuilder(callingActivity).run {
setTitle(R.string.passphrase_dialog_title)
setMessage(R.string.passphrase_dialog_text)
setView(dialogView)
setPositiveButton(R.string.dialog_ok) { _, _ ->
val passphrase = editPassphrase.text.toString()
if (rememberPassphrase.isChecked) {
encryptedSettings.edit {
putString("ssh_key_local_passphrase", passphrase)
}
}
cont.resume(passphrase)
}
setNegativeButton(R.string.dialog_cancel) { _, _ ->
cont.resume(null)
}
setOnCancelListener {
cont.resume(null)
}
create()
}.run {
requestInputFocusOnView<TextInputEditText>(R.id.git_auth_passphrase)
show()
}
} else {
cont.resume(storedPassphrase)
}
}).execute()
}
}
ConnectionMode.OpenKeychain -> {
setAuthentication(username, identity).execute()
}
ConnectionMode.Password -> {
@SuppressLint("InflateParams") val dialogView = callingActivity.layoutInflater.inflate(R.layout.git_passphrase_layout, null)
val passwordView = dialogView.findViewById<TextInputEditText>(R.id.git_auth_passphrase)
val password = encryptedSettings.getString("https_password", null)
if (password != null && password.isNotEmpty()) {
setAuthentication(username, password).execute()
} else {
val dialog = MaterialAlertDialogBuilder(callingActivity)
.setTitle(callingActivity.resources.getString(R.string.passphrase_dialog_title))
.setMessage(callingActivity.resources.getString(R.string.password_dialog_text))
.setView(dialogView)
.setPositiveButton(callingActivity.resources.getString(R.string.dialog_ok)) { _, _ ->
if (dialogView.findViewById<MaterialCheckBox>(R.id.git_auth_remember_passphrase).isChecked) {
encryptedSettings.edit { putString("https_password", passwordView.text.toString()) }
}
// authenticate using the user/pwd and then execute the command
setAuthentication(username, passwordView.text.toString()).execute()
}
.setNegativeButton(callingActivity.resources.getString(R.string.dialog_cancel)) { _, _ ->
callingActivity.finish()
}
.setOnCancelListener { callingActivity.finish() }
.create()
dialog.requestInputFocusOnView<TextInputEditText>(R.id.git_auth_passphrase)
dialog.show()
}
}
ConnectionMode.None -> {
execute()
}
}
}
/**
* Action to execute on error
*/
open fun onError(err: Exception) {
// Clear various auth related fields on failure
when (SshSessionFactory.getInstance()) {
is SshApiSessionFactory -> {
PreferenceManager.getDefaultSharedPreferences(callingActivity.applicationContext)
.edit { putString("ssh_openkeystore_keyid", null) }
}
is SshjSessionFactory -> {
callingActivity.applicationContext
.getEncryptedPrefs("git_operation")
.edit { remove("ssh_key_local_passphrase") }
}
is GitConfigSessionFactory -> {
callingActivity.applicationContext
.getEncryptedPrefs("git_operation")
.edit { remove("https_password") }
}
}
}
/**
* Action to execute on success
*/
open fun onSuccess() {}
companion object {
const val GET_SSH_KEY_FROM_CLONE = 201
}
}
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