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/*
* Copyright © 2014-2020 The Android Password Store Authors. All Rights Reserved.
* SPDX-License-Identifier: GPL-3.0-only
*/
package dev.msfjarvis.aps.util.autofill
import android.content.Context
import android.os.Build
import androidx.annotation.RequiresApi
import com.github.androidpasswordstore.autofillparser.Credentials
import dev.msfjarvis.aps.data.password.PasswordEntry
import dev.msfjarvis.aps.util.extensions.sharedPrefs
import dev.msfjarvis.aps.util.services.getDefaultUsername
import java.io.File
import java.nio.file.Paths
enum class DirectoryStructure(val value: String) {
EncryptedUsername("encrypted_username"),
FileBased("file"),
DirectoryBased("directory");
/**
* Returns the username associated to [file], following the convention of the current
* [DirectoryStructure].
*
* Examples:
* - * --> null (EncryptedUsername)
* - work/example.org/john@doe.org.gpg --> john@doe.org (FileBased)
* - work/example.org/john@doe.org/password.gpg --> john@doe.org (DirectoryBased)
* - Temporary PIN.gpg --> Temporary PIN (DirectoryBased, fallback)
*/
fun getUsernameFor(file: File): String? = when (this) {
EncryptedUsername -> null
FileBased -> file.nameWithoutExtension
DirectoryBased -> file.parentFile?.name ?: file.nameWithoutExtension
}
/**
* Returns the origin identifier associated to [file], following the convention of the current
* [DirectoryStructure].
*
* At least one of [DirectoryStructure.getIdentifierFor] and
* [DirectoryStructure.getAccountPartFor] will always return a non-null result.
*
* Examples:
* - work/example.org.gpg --> example.org (EncryptedUsername)
* - work/example.org/john@doe.org.gpg --> example.org (FileBased)
* - example.org.gpg --> example.org (FileBased, fallback)
* - work/example.org/john@doe.org/password.gpg --> example.org (DirectoryBased)
* - Temporary PIN.gpg --> null (DirectoryBased)
*/
fun getIdentifierFor(file: File): String? = when (this) {
EncryptedUsername -> file.nameWithoutExtension
FileBased -> file.parentFile?.name ?: file.nameWithoutExtension
DirectoryBased -> file.parentFile?.parent
}
/**
* Returns the path components of [file] until right before the component that contains the
* origin identifier according to the current [DirectoryStructure].
*
* Examples:
* - work/example.org.gpg --> work (EncryptedUsername)
* - work/example.org/john@doe.org.gpg --> work (FileBased)
* - example.org/john@doe.org.gpg --> null (FileBased)
* - john@doe.org.gpg --> null (FileBased)
* - work/example.org/john@doe.org/password.gpg --> work (DirectoryBased)
* - example.org/john@doe.org/password.gpg --> null (DirectoryBased)
*/
fun getPathToIdentifierFor(file: File): String? = when (this) {
EncryptedUsername -> file.parent
FileBased -> file.parentFile?.parent
DirectoryBased -> file.parentFile?.parentFile?.parent
}
/**
* Returns the path component of [file] following the origin identifier according to the current
* [DirectoryStructure] (without file extension).
*
* At least one of [DirectoryStructure.getIdentifierFor] and
* [DirectoryStructure.getAccountPartFor] will always return a non-null result.
*
* Examples:
* - * --> null (EncryptedUsername)
* - work/example.org/john@doe.org.gpg --> john@doe.org (FileBased)
* - example.org.gpg --> null (FileBased, fallback)
* - work/example.org/john@doe.org/password.gpg --> john@doe.org/password (DirectoryBased)
* - Temporary PIN.gpg --> Temporary PIN (DirectoryBased, fallback)
*/
fun getAccountPartFor(file: File): String? = when (this) {
EncryptedUsername -> null
FileBased -> file.nameWithoutExtension.takeIf { file.parentFile != null }
DirectoryBased -> file.parentFile?.let { parentFile ->
"${parentFile.name}/${file.nameWithoutExtension}"
} ?: file.nameWithoutExtension
}
@RequiresApi(Build.VERSION_CODES.O)
fun getSaveFolderName(sanitizedIdentifier: String, username: String?) = when (this) {
EncryptedUsername -> "/"
FileBased -> sanitizedIdentifier
DirectoryBased -> Paths.get(sanitizedIdentifier, username ?: "username").toString()
}
fun getSaveFileName(username: String?, identifier: String) = when (this) {
EncryptedUsername -> identifier
FileBased -> username
DirectoryBased -> "password"
}
companion object {
const val PREFERENCE = "oreo_autofill_directory_structure"
private val DEFAULT = FileBased
private val reverseMap = values().associateBy { it.value }
fun fromValue(value: String?) = if (value != null) reverseMap[value] ?: DEFAULT else DEFAULT
}
}
object AutofillPreferences {
fun directoryStructure(context: Context): DirectoryStructure {
val value = context.sharedPrefs.getString(DirectoryStructure.PREFERENCE, null)
return DirectoryStructure.fromValue(value)
}
fun credentialsFromStoreEntry(
context: Context,
file: File,
entry: PasswordEntry,
directoryStructure: DirectoryStructure
): Credentials {
// Always give priority to a username stored in the encrypted extras
val username = entry.username
?: directoryStructure.getUsernameFor(file)
?: context.getDefaultUsername()
return Credentials(username, entry.password, entry.calculateTotpCode())
}
}
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