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/*
* Tinc App, an Android binding and user interface for the tinc mesh VPN daemon
* Copyright (C) 2017-2020 Pacien TRAN-GIRARD
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
package org.pacien.tincapp.utils
import org.pacien.tincapp.commands.TincApp
import org.pacien.tincapp.context.AppPaths
import java.io.File
import java.io.FileNotFoundException
import java.io.FileWriter
/**
* @author pacien
*/
object TincKeyring {
fun needsPassphrase(netName: String) = try {
TincApp.listPrivateKeys(netName).filter { it.exists() }.any { PemUtils.isEncrypted(PemUtils.read(it)) }
} catch (e: FileNotFoundException) {
false
}
fun unlockKey(target: String, input: File?, passphrase: String?): File? {
if (input == null || !input.exists() || passphrase == null) return null
val decryptedKey = PemUtils.decrypt(PemUtils.read(input), passphrase)
val decryptedFile = tempKey(target)
PemUtils.write(decryptedKey, FileWriter(decryptedFile, false))
return decryptedFile
}
private fun tempKey(name: String): File {
val file = File(AppPaths.internalCacheDir(), name)
file.createNewFile()
file.deleteOnExit()
file.makePrivate()
return file
}
private fun File.makePrivate() {
this.setExecutable(false, false)
this.setReadable(true, true)
this.setWritable(true, true)
}
}
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