aboutsummaryrefslogtreecommitdiffstats
path: root/app/src/main/java/dev/msfjarvis/aps/util/autofill/AutofillMatcher.kt
diff options
context:
space:
mode:
authorHarsh Shandilya <me@msfjarvis.dev>2022-07-15 00:53:48 +0530
committerHarsh Shandilya <me@msfjarvis.dev>2022-07-15 01:13:47 +0530
commit549ee790d3e52bc62565ddf92e6a556e98b5195e (patch)
treed5758e5eb80093704e683c8da926838e18182588 /app/src/main/java/dev/msfjarvis/aps/util/autofill/AutofillMatcher.kt
parent010c6e227c9cc27f4d01bc912311f977b2aeb3a7 (diff)
downloadHardenedPass-549ee790d3e52bc62565ddf92e6a556e98b5195e.tar.gz
HardenedPass-549ee790d3e52bc62565ddf92e6a556e98b5195e.zip
all: re-do package structure yet again
Diffstat (limited to 'app/src/main/java/dev/msfjarvis/aps/util/autofill/AutofillMatcher.kt')
-rw-r--r--app/src/main/java/dev/msfjarvis/aps/util/autofill/AutofillMatcher.kt202
1 files changed, 0 insertions, 202 deletions
diff --git a/app/src/main/java/dev/msfjarvis/aps/util/autofill/AutofillMatcher.kt b/app/src/main/java/dev/msfjarvis/aps/util/autofill/AutofillMatcher.kt
deleted file mode 100644
index 42c1d693..00000000
--- a/app/src/main/java/dev/msfjarvis/aps/util/autofill/AutofillMatcher.kt
+++ /dev/null
@@ -1,202 +0,0 @@
-/*
- * Copyright © 2014-2021 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.content.SharedPreferences
-import android.widget.Toast
-import androidx.core.content.edit
-import com.github.androidpasswordstore.autofillparser.FormOrigin
-import com.github.androidpasswordstore.autofillparser.computeCertificatesHash
-import com.github.michaelbull.result.Err
-import com.github.michaelbull.result.Ok
-import com.github.michaelbull.result.Result
-import dev.msfjarvis.aps.R
-import java.io.File
-import logcat.LogPriority.ERROR
-import logcat.LogPriority.WARN
-import logcat.logcat
-
-private const val PREFERENCES_AUTOFILL_APP_MATCHES = "oreo_autofill_app_matches"
-private val Context.autofillAppMatches
- get() = getSharedPreferences(PREFERENCES_AUTOFILL_APP_MATCHES, Context.MODE_PRIVATE)
-
-private const val PREFERENCES_AUTOFILL_WEB_MATCHES = "oreo_autofill_web_matches"
-private val Context.autofillWebMatches
- get() = getSharedPreferences(PREFERENCES_AUTOFILL_WEB_MATCHES, Context.MODE_PRIVATE)
-
-private fun Context.matchPreferences(formOrigin: FormOrigin): SharedPreferences {
- return when (formOrigin) {
- is FormOrigin.App -> autofillAppMatches
- is FormOrigin.Web -> autofillWebMatches
- }
-}
-
-class AutofillPublisherChangedException(val formOrigin: FormOrigin) :
- Exception(
- "The publisher of '${formOrigin.identifier}' changed since an entry was first matched with this app"
- ) {
-
- init {
- require(formOrigin is FormOrigin.App)
- }
-}
-
-/** Manages "matches", i.e., associations between apps or websites and Password Store entries. */
-class AutofillMatcher {
-
- companion object {
-
- private const val MAX_NUM_MATCHES = 10
-
- private const val PREFERENCE_PREFIX_TOKEN = "token;"
- private fun tokenKey(formOrigin: FormOrigin.App) =
- "$PREFERENCE_PREFIX_TOKEN${formOrigin.identifier}"
-
- private const val PREFERENCE_PREFIX_MATCHES = "matches;"
- private fun matchesKey(formOrigin: FormOrigin) =
- "$PREFERENCE_PREFIX_MATCHES${formOrigin.identifier}"
-
- private fun hasFormOriginHashChanged(context: Context, formOrigin: FormOrigin): Boolean {
- return when (formOrigin) {
- is FormOrigin.Web -> false
- is FormOrigin.App -> {
- val packageName = formOrigin.identifier
- val certificatesHash = computeCertificatesHash(context, packageName)
- val storedCertificatesHash =
- context.autofillAppMatches.getString(tokenKey(formOrigin), null) ?: return false
- val hashHasChanged = certificatesHash != storedCertificatesHash
- if (hashHasChanged) {
- logcat(ERROR) { "$packageName: stored=$storedCertificatesHash, new=$certificatesHash" }
- true
- } else {
- false
- }
- }
- }
- }
-
- private fun storeFormOriginHash(context: Context, formOrigin: FormOrigin) {
- if (formOrigin is FormOrigin.App) {
- val packageName = formOrigin.identifier
- val certificatesHash = computeCertificatesHash(context, packageName)
- context.autofillAppMatches.edit { putString(tokenKey(formOrigin), certificatesHash) }
- }
- // We don't need to store a hash for FormOrigin.Web since it can only originate from
- // browsers we trust to verify the origin.
- }
-
- /**
- * Get all Password Store entries that have already been associated with [formOrigin] by the
- * user.
- *
- * If [formOrigin] represents an app and that app's certificates have changed since the first
- * time the user associated an entry with it, an [AutofillPublisherChangedException] will be
- * thrown.
- */
- fun getMatchesFor(
- context: Context,
- formOrigin: FormOrigin
- ): Result<List<File>, AutofillPublisherChangedException> {
- if (hasFormOriginHashChanged(context, formOrigin)) {
- return Err(AutofillPublisherChangedException(formOrigin))
- }
- val matchPreferences = context.matchPreferences(formOrigin)
- val matchedFiles =
- matchPreferences.getStringSet(matchesKey(formOrigin), emptySet())!!.map { File(it) }
- return Ok(
- matchedFiles
- .filter { it.exists() }
- .also { validFiles ->
- matchPreferences.edit {
- putStringSet(matchesKey(formOrigin), validFiles.map { it.absolutePath }.toSet())
- }
- }
- )
- }
-
- fun clearMatchesFor(context: Context, formOrigin: FormOrigin) {
- context.matchPreferences(formOrigin).edit {
- remove(matchesKey(formOrigin))
- if (formOrigin is FormOrigin.App) remove(tokenKey(formOrigin))
- }
- }
-
- /**
- * Associates the store entry [file] with [formOrigin], such that future Autofill responses to
- * requests from this app or website offer this entry as a dataset.
- *
- * The maximum number of matches is limited by [MAX_NUM_MATCHES] since older versions of Android
- * may crash when too many datasets are offered.
- */
- fun addMatchFor(context: Context, formOrigin: FormOrigin, file: File) {
- if (!file.exists()) return
- if (hasFormOriginHashChanged(context, formOrigin)) {
- // This should never happen since we already verified the publisher in
- // getMatchesFor.
- logcat(ERROR) { "App publisher changed between getMatchesFor and addMatchFor" }
- throw AutofillPublisherChangedException(formOrigin)
- }
- val matchPreferences = context.matchPreferences(formOrigin)
- val matchedFiles =
- matchPreferences.getStringSet(matchesKey(formOrigin), emptySet())!!.map { File(it) }
- val newFiles = setOf(file.absoluteFile).union(matchedFiles)
- if (newFiles.size > MAX_NUM_MATCHES) {
- Toast.makeText(
- context,
- context.getString(R.string.oreo_autofill_max_matches_reached, MAX_NUM_MATCHES),
- Toast.LENGTH_LONG
- )
- .show()
- return
- }
- matchPreferences.edit {
- putStringSet(matchesKey(formOrigin), newFiles.map { it.absolutePath }.toSet())
- }
- storeFormOriginHash(context, formOrigin)
- logcat { "Stored match for $formOrigin" }
- }
-
- /**
- * Goes through all existing matches and updates their associated entries by using [moveFromTo]
- * as a lookup table and deleting the matches for files in [delete].
- */
- fun updateMatches(
- context: Context,
- moveFromTo: Map<File, File> = emptyMap(),
- delete: Collection<File> = emptyList()
- ) {
- val deletePathList = delete.map { it.absolutePath }
- val oldNewPathMap =
- moveFromTo.mapValues { it.value.absolutePath }.mapKeys { it.key.absolutePath }
- for (prefs in listOf(context.autofillAppMatches, context.autofillWebMatches)) {
- for ((key, value) in prefs.all) {
- if (!key.startsWith(PREFERENCE_PREFIX_MATCHES)) continue
- // We know that preferences starting with `PREFERENCE_PREFIX_MATCHES` were
- // created with `putStringSet`.
- @Suppress("UNCHECKED_CAST") val oldMatches = value as? Set<String>
- if (oldMatches == null) {
- logcat(WARN) { "Failed to read matches for $key" }
- continue
- }
- // Delete all matches for file locations that are going to be overwritten, then
- // transfer matches over to the files at their new locations.
- val newMatches =
- oldMatches
- .asSequence()
- .minus(deletePathList)
- .minus(oldNewPathMap.values)
- .map { match ->
- val newPath = oldNewPathMap[match] ?: return@map match
- logcat { "Updating match for $key: $match --> $newPath" }
- newPath
- }
- .toSet()
- if (newMatches != oldMatches) prefs.edit { putStringSet(key, newMatches) }
- }
- }
- }
- }
-}