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/*
* Copyright © 2014-2021 The Android Password Store Authors. All Rights Reserved.
* SPDX-License-Identifier: GPL-3.0-only
*/
package dev.msfjarvis.aps.util.totp
import android.net.Uri
import javax.inject.Inject
/** [Uri] backed TOTP URL parser. */
class UriTotpFinder @Inject constructor() : TotpFinder {
override fun findSecret(content: String): String? {
content.split("\n".toRegex()).forEach { line ->
if (line.startsWith(TotpFinder.TOTP_FIELDS[0])) {
return Uri.parse(line).getQueryParameter("secret")
}
if (line.startsWith(TotpFinder.TOTP_FIELDS[1], ignoreCase = true)) {
return line.split(": *".toRegex(), 2).toTypedArray()[1]
}
}
return null
}
override fun findDigits(content: String): String {
return getQueryParameter(content, "digits") ?: "6"
}
override fun findPeriod(content: String): Long {
return getQueryParameter(content, "period")?.toLongOrNull() ?: 30
}
override fun findAlgorithm(content: String): String {
return getQueryParameter(content, "algorithm") ?: "sha1"
}
override fun findIssuer(content: String): String? {
return getQueryParameter(content, "issuer") ?: Uri.parse(content).authority
}
private fun getQueryParameter(content: String, parameterName: String): String? {
content.split("\n".toRegex()).forEach { line ->
val uri = Uri.parse(line)
if (line.startsWith(TotpFinder.TOTP_FIELDS[0]) && uri.getQueryParameter(parameterName) != null
) {
return uri.getQueryParameter(parameterName)
}
}
return null
}
}
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