From 070fd9b7d3793082e447d7713d1dda932f237c99 Mon Sep 17 00:00:00 2001 From: Torsten Grote Date: Wed, 18 Mar 2020 15:54:36 -0300 Subject: Factor out some cashier code into common library --- cashier/src/main/AndroidManifest.xml | 4 - cashier/src/main/java/net/taler/cashier/Amount.kt | 45 ---- .../main/java/net/taler/cashier/BalanceFragment.kt | 3 + .../main/java/net/taler/cashier/MainViewModel.kt | 3 +- cashier/src/main/java/net/taler/cashier/Utils.kt | 91 -------- .../java/net/taler/cashier/withdraw/NfcManager.kt | 234 --------------------- .../net/taler/cashier/withdraw/QrCodeManager.kt | 42 ---- .../taler/cashier/withdraw/TransactionFragment.kt | 5 +- .../net/taler/cashier/withdraw/WithdrawManager.kt | 3 +- 9 files changed, 10 insertions(+), 420 deletions(-) delete mode 100644 cashier/src/main/java/net/taler/cashier/Amount.kt delete mode 100644 cashier/src/main/java/net/taler/cashier/Utils.kt delete mode 100644 cashier/src/main/java/net/taler/cashier/withdraw/NfcManager.kt delete mode 100644 cashier/src/main/java/net/taler/cashier/withdraw/QrCodeManager.kt (limited to 'cashier/src') diff --git a/cashier/src/main/AndroidManifest.xml b/cashier/src/main/AndroidManifest.xml index 345c9a1..bdc5ec0 100644 --- a/cashier/src/main/AndroidManifest.xml +++ b/cashier/src/main/AndroidManifest.xml @@ -3,10 +3,6 @@ xmlns:tools="http://schemas.android.com/tools" package="net.taler.cashier"> - - - - - */ - -package net.taler.cashier - -data class Amount(val currency: String, val amount: String) { - - companion object { - - private val SIGNED_REGEX = Regex("""([+\-])(\w+):([0-9.]+)""") - - @Suppress("unused") - fun fromString(strAmount: String): Amount { - val components = strAmount.split(":") - return Amount(components[0], components[1]) - } - - fun fromStringSigned(strAmount: String): Amount? { - val groups = SIGNED_REGEX.matchEntire(strAmount)?.groupValues ?: emptyList() - if (groups.size < 4) return null - var amount = groups[3].toDoubleOrNull() ?: return null - if (groups[1] == "-") amount *= -1 - val currency = groups[2] - val amountStr = amount.toString() - // only display as many digits as required to precisely render the balance - return Amount(currency, amountStr.removeSuffix(".0")) - } - } - - override fun toString() = "$amount $currency" - -} diff --git a/cashier/src/main/java/net/taler/cashier/BalanceFragment.kt b/cashier/src/main/java/net/taler/cashier/BalanceFragment.kt index b3a0221..2178a78 100644 --- a/cashier/src/main/java/net/taler/cashier/BalanceFragment.kt +++ b/cashier/src/main/java/net/taler/cashier/BalanceFragment.kt @@ -34,6 +34,9 @@ import kotlinx.android.synthetic.main.fragment_balance.* import net.taler.cashier.BalanceFragmentDirections.Companion.actionBalanceFragmentToTransactionFragment import net.taler.cashier.withdraw.LastTransaction import net.taler.cashier.withdraw.WithdrawStatus +import net.taler.common.Amount +import net.taler.common.fadeIn +import net.taler.common.fadeOut sealed class BalanceResult { object Error : BalanceResult() diff --git a/cashier/src/main/java/net/taler/cashier/MainViewModel.kt b/cashier/src/main/java/net/taler/cashier/MainViewModel.kt index 3874038..6cd12ff 100644 --- a/cashier/src/main/java/net/taler/cashier/MainViewModel.kt +++ b/cashier/src/main/java/net/taler/cashier/MainViewModel.kt @@ -32,9 +32,10 @@ import androidx.security.crypto.MasterKeys import androidx.security.crypto.MasterKeys.AES256_GCM_SPEC import kotlinx.coroutines.Dispatchers import kotlinx.coroutines.launch -import net.taler.cashier.Amount.Companion.fromStringSigned import net.taler.cashier.HttpHelper.makeJsonGetRequest import net.taler.cashier.withdraw.WithdrawManager +import net.taler.common.Amount.Companion.fromStringSigned +import net.taler.common.isOnline private val TAG = MainViewModel::class.java.simpleName diff --git a/cashier/src/main/java/net/taler/cashier/Utils.kt b/cashier/src/main/java/net/taler/cashier/Utils.kt deleted file mode 100644 index 62f7a77..0000000 --- a/cashier/src/main/java/net/taler/cashier/Utils.kt +++ /dev/null @@ -1,91 +0,0 @@ -/* - * This file is part of GNU Taler - * (C) 2020 Taler Systems S.A. - * - * GNU Taler 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, or (at your option) any later version. - * - * GNU Taler 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 - * GNU Taler; see the file COPYING. If not, see - */ - -package net.taler.cashier - -import android.content.Context -import android.content.Context.CONNECTIVITY_SERVICE -import android.net.ConnectivityManager -import android.net.NetworkCapabilities.NET_CAPABILITY_INTERNET -import android.os.Build.VERSION.SDK_INT -import android.view.View -import android.view.View.INVISIBLE -import android.view.View.VISIBLE - -object Utils { - - private const val HEX_CHARS = "0123456789ABCDEF" - - fun hexStringToByteArray(data: String): ByteArray { - val result = ByteArray(data.length / 2) - - for (i in data.indices step 2) { - val firstIndex = HEX_CHARS.indexOf(data[i]) - val secondIndex = HEX_CHARS.indexOf(data[i + 1]) - - val octet = firstIndex.shl(4).or(secondIndex) - result[i.shr(1)] = octet.toByte() - } - return result - } - - - private val HEX_CHARS_ARRAY = HEX_CHARS.toCharArray() - - @Suppress("unused") - fun toHex(byteArray: ByteArray): String { - val result = StringBuffer() - - byteArray.forEach { - val octet = it.toInt() - val firstIndex = (octet and 0xF0).ushr(4) - val secondIndex = octet and 0x0F - result.append(HEX_CHARS_ARRAY[firstIndex]) - result.append(HEX_CHARS_ARRAY[secondIndex]) - } - return result.toString() - } - -} - -fun View.fadeIn(endAction: () -> Unit = {}) { - if (visibility == VISIBLE) return - alpha = 0f - visibility = VISIBLE - animate().alpha(1f).withEndAction { - endAction.invoke() - }.start() -} - -fun View.fadeOut(endAction: () -> Unit = {}) { - if (visibility == INVISIBLE) return - animate().alpha(0f).withEndAction { - visibility = INVISIBLE - alpha = 1f - endAction.invoke() - }.start() -} - -fun Context.isOnline(): Boolean { - val cm = getSystemService(CONNECTIVITY_SERVICE) as ConnectivityManager - return if (SDK_INT < 29) { - @Suppress("DEPRECATION") - cm.activeNetworkInfo?.isConnected == true - } else { - val capabilities = cm.getNetworkCapabilities(cm.activeNetwork) ?: return false - capabilities.hasCapability(NET_CAPABILITY_INTERNET) - } -} diff --git a/cashier/src/main/java/net/taler/cashier/withdraw/NfcManager.kt b/cashier/src/main/java/net/taler/cashier/withdraw/NfcManager.kt deleted file mode 100644 index a487b5f..0000000 --- a/cashier/src/main/java/net/taler/cashier/withdraw/NfcManager.kt +++ /dev/null @@ -1,234 +0,0 @@ -/* - * This file is part of GNU Taler - * (C) 2020 Taler Systems S.A. - * - * GNU Taler 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, or (at your option) any later version. - * - * GNU Taler 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 - * GNU Taler; see the file COPYING. If not, see - */ - -package net.taler.cashier.withdraw - -import android.app.Activity -import android.content.Context -import android.nfc.NfcAdapter -import android.nfc.NfcAdapter.FLAG_READER_NFC_A -import android.nfc.NfcAdapter.FLAG_READER_SKIP_NDEF_CHECK -import android.nfc.NfcAdapter.getDefaultAdapter -import android.nfc.Tag -import android.nfc.tech.IsoDep -import android.util.Log -import net.taler.cashier.Utils.hexStringToByteArray -import org.json.JSONObject -import java.io.ByteArrayOutputStream -import java.net.URL -import javax.net.ssl.HttpsURLConnection - -@Suppress("unused") -private const val TALER_AID = "A0000002471001" - -class NfcManager : NfcAdapter.ReaderCallback { - - companion object { - const val TAG = "taler-merchant" - - /** - * Returns true if NFC is supported and false otherwise. - */ - fun hasNfc(context: Context): Boolean { - return getNfcAdapter(context) != null - } - - /** - * Enables NFC reader mode. Don't forget to call [stop] afterwards. - */ - fun start(activity: Activity, nfcManager: NfcManager) { - getNfcAdapter(activity)?.enableReaderMode(activity, nfcManager, nfcManager.flags, null) - } - - /** - * Disables NFC reader mode. Call after [start]. - */ - fun stop(activity: Activity) { - getNfcAdapter(activity)?.disableReaderMode(activity) - } - - private fun getNfcAdapter(context: Context): NfcAdapter? { - return getDefaultAdapter(context) - } - } - - private val flags = FLAG_READER_NFC_A or FLAG_READER_SKIP_NDEF_CHECK - - private var tagString: String? = null - private var currentTag: IsoDep? = null - - fun setTagString(tagString: String) { - this.tagString = tagString - } - - override fun onTagDiscovered(tag: Tag?) { - - Log.v(TAG, "tag discovered") - - val isoDep = IsoDep.get(tag) - isoDep.connect() - - currentTag = isoDep - - isoDep.transceive(apduSelectFile()) - - val tagString: String? = tagString - if (tagString != null) { - isoDep.transceive(apduPutTalerData(1, tagString.toByteArray())) - } - - // FIXME: use better pattern for sleeps in between requests - // -> start with fast polling, poll more slowly if no requests are coming - - while (true) { - try { - val reqFrame = isoDep.transceive(apduGetData()) - if (reqFrame.size < 2) { - Log.v(TAG, "request frame too small") - break - } - val req = ByteArray(reqFrame.size - 2) - if (req.isEmpty()) { - continue - } - reqFrame.copyInto(req, 0, 0, reqFrame.size - 2) - val jsonReq = JSONObject(req.toString(Charsets.UTF_8)) - val reqId = jsonReq.getInt("id") - Log.v(TAG, "got request $jsonReq") - val jsonInnerReq = jsonReq.getJSONObject("request") - val method = jsonInnerReq.getString("method") - val urlStr = jsonInnerReq.getString("url") - Log.v(TAG, "url '$urlStr'") - Log.v(TAG, "method '$method'") - val url = URL(urlStr) - val conn: HttpsURLConnection = url.openConnection() as HttpsURLConnection - conn.setRequestProperty("Accept", "application/json") - conn.connectTimeout = 5000 - conn.doInput = true - when (method) { - "get" -> { - conn.requestMethod = "GET" - } - "postJson" -> { - conn.requestMethod = "POST" - conn.doOutput = true - conn.setRequestProperty("Content-Type", "application/json; utf-8") - val body = jsonInnerReq.getString("body") - conn.outputStream.write(body.toByteArray(Charsets.UTF_8)) - } - else -> { - throw Exception("method not supported") - } - } - Log.v(TAG, "connecting") - conn.connect() - Log.v(TAG, "connected") - - val statusCode = conn.responseCode - val tunnelResp = JSONObject() - tunnelResp.put("id", reqId) - tunnelResp.put("status", conn.responseCode) - - if (statusCode == 200) { - val stream = conn.inputStream - val httpResp = stream.buffered().readBytes() - tunnelResp.put("responseJson", JSONObject(httpResp.toString(Charsets.UTF_8))) - } - - Log.v(TAG, "sending: $tunnelResp") - - isoDep.transceive(apduPutTalerData(2, tunnelResp.toString().toByteArray())) - } catch (e: Exception) { - Log.v(TAG, "exception during NFC loop: $e") - break - } - } - - isoDep.close() - } - - private fun writeApduLength(stream: ByteArrayOutputStream, size: Int) { - when { - size == 0 -> { - // No size field needed! - } - size <= 255 -> // One byte size field - stream.write(size) - size <= 65535 -> { - stream.write(0) - // FIXME: is this supposed to be little or big endian? - stream.write(size and 0xFF) - stream.write((size ushr 8) and 0xFF) - } - else -> throw Error("payload too big") - } - } - - private fun apduSelectFile(): ByteArray { - return hexStringToByteArray("00A4040007A0000002471001") - } - - private fun apduPutData(payload: ByteArray): ByteArray { - val stream = ByteArrayOutputStream() - - // Class - stream.write(0x00) - - // Instruction 0xDA = put data - stream.write(0xDA) - - // Instruction parameters - // (proprietary encoding) - stream.write(0x01) - stream.write(0x00) - - writeApduLength(stream, payload.size) - - stream.write(payload) - - return stream.toByteArray() - } - - private fun apduPutTalerData(talerInst: Int, payload: ByteArray): ByteArray { - val realPayload = ByteArrayOutputStream() - realPayload.write(talerInst) - realPayload.write(payload) - return apduPutData(realPayload.toByteArray()) - } - - private fun apduGetData(): ByteArray { - val stream = ByteArrayOutputStream() - - // Class - stream.write(0x00) - - // Instruction 0xCA = get data - stream.write(0xCA) - - // Instruction parameters - // (proprietary encoding) - stream.write(0x01) - stream.write(0x00) - - // Max expected response size, two - // zero bytes denotes 65536 - stream.write(0x0) - stream.write(0x0) - - return stream.toByteArray() - } - -} diff --git a/cashier/src/main/java/net/taler/cashier/withdraw/QrCodeManager.kt b/cashier/src/main/java/net/taler/cashier/withdraw/QrCodeManager.kt deleted file mode 100644 index e3ffa92..0000000 --- a/cashier/src/main/java/net/taler/cashier/withdraw/QrCodeManager.kt +++ /dev/null @@ -1,42 +0,0 @@ -/* - * This file is part of GNU Taler - * (C) 2020 Taler Systems S.A. - * - * GNU Taler 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, or (at your option) any later version. - * - * GNU Taler 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 - * GNU Taler; see the file COPYING. If not, see - */ - -package net.taler.cashier.withdraw - -import android.graphics.Bitmap -import android.graphics.Bitmap.Config.RGB_565 -import android.graphics.Color.BLACK -import android.graphics.Color.WHITE -import com.google.zxing.BarcodeFormat.QR_CODE -import com.google.zxing.qrcode.QRCodeWriter - -object QrCodeManager { - - fun makeQrCode(text: String, size: Int = 256): Bitmap { - val qrCodeWriter = QRCodeWriter() - val bitMatrix = qrCodeWriter.encode(text, QR_CODE, size, size) - val height = bitMatrix.height - val width = bitMatrix.width - val bmp = Bitmap.createBitmap(width, height, RGB_565) - for (x in 0 until width) { - for (y in 0 until height) { - bmp.setPixel(x, y, if (bitMatrix.get(x, y)) BLACK else WHITE) - } - } - return bmp - } - -} diff --git a/cashier/src/main/java/net/taler/cashier/withdraw/TransactionFragment.kt b/cashier/src/main/java/net/taler/cashier/withdraw/TransactionFragment.kt index 8b782b0..8857bfa 100644 --- a/cashier/src/main/java/net/taler/cashier/withdraw/TransactionFragment.kt +++ b/cashier/src/main/java/net/taler/cashier/withdraw/TransactionFragment.kt @@ -30,13 +30,14 @@ import androidx.navigation.fragment.findNavController import kotlinx.android.synthetic.main.fragment_transaction.* import net.taler.cashier.MainViewModel import net.taler.cashier.R -import net.taler.cashier.fadeIn -import net.taler.cashier.fadeOut import net.taler.cashier.withdraw.TransactionFragmentDirections.Companion.actionTransactionFragmentToBalanceFragment import net.taler.cashier.withdraw.TransactionFragmentDirections.Companion.actionTransactionFragmentToErrorFragment import net.taler.cashier.withdraw.WithdrawResult.Error import net.taler.cashier.withdraw.WithdrawResult.InsufficientBalance import net.taler.cashier.withdraw.WithdrawResult.Success +import net.taler.common.NfcManager +import net.taler.common.fadeIn +import net.taler.common.fadeOut class TransactionFragment : Fragment() { diff --git a/cashier/src/main/java/net/taler/cashier/withdraw/WithdrawManager.kt b/cashier/src/main/java/net/taler/cashier/withdraw/WithdrawManager.kt index 4c618ac..bfc82ce 100644 --- a/cashier/src/main/java/net/taler/cashier/withdraw/WithdrawManager.kt +++ b/cashier/src/main/java/net/taler/cashier/withdraw/WithdrawManager.kt @@ -34,6 +34,7 @@ import net.taler.cashier.HttpJsonResult.Error import net.taler.cashier.HttpJsonResult.Success import net.taler.cashier.MainViewModel import net.taler.cashier.R +import net.taler.common.QrCodeManager.makeQrCode import org.json.JSONObject import java.util.concurrent.TimeUnit.MINUTES import java.util.concurrent.TimeUnit.SECONDS @@ -95,7 +96,7 @@ class WithdrawManager( val withdrawResult = WithdrawResult.Success( id = result.json.getString("withdrawal_id"), talerUri = talerUri, - qrCode = QrCodeManager.makeQrCode(talerUri) + qrCode = makeQrCode(talerUri) ) mWithdrawResult.postValue(withdrawResult) timer.start() -- cgit v1.2.3