Merge pull request #513 from dcangulo/cpp-android

feat: reimplement android on cpp

Author: dcangulo

android/cpp-adapter.cpp

@@ -3,7 +3,7 @@
 
 extern "C"
 JNIEXPORT jstring JNICALL
-Java_com_pkcechallenge_PkceChallengeModule_nativeGetRandomBase64String(JNIEnv *env, jclass type, jdouble byte_length) {
+Java_com_pkcechallenge_PkceChallengeManager_nativeGetRandomBase64String(JNIEnv *env, jclass type, jdouble byte_length) {
   std::string encoded_data = pkcechallenge::getRandomBase64String(byte_length);
 
   return env->NewStringUTF(encoded_data.c_str());

android/src/main/java/com/pkcechallenge/PkceChallengeManager.kt

@@ -0,0 +1,13 @@
+package com.pkcechallenge
+
+class PkceChallengeManager {
+  companion object {
+    init {
+      System.loadLibrary("react-native-pkce-challenge")
+    }
+
+    @JvmStatic private external fun nativeGetRandomBase64String(byteLength: Double): String
+  }
+  
+  fun getRandomBase64String(byteLength: Double): String = nativeGetRandomBase64String(byteLength)
+}

android/src/main/java/com/pkcechallenge/PkceChallengeModule.kt

@@ -17,11 +17,9 @@ class PkceChallengeModule(reactContext: ReactApplicationContext) :
   // Example method
   // See https://reactnative.dev/docs/native-modules-android
   override fun getRandomBase64String(byteLength: Double): String {
-    val bytes = ByteArray(byteLength.toInt())
-    val secureRandom = SecureRandom()
-    secureRandom.nextBytes(bytes)
+    val manager = PkceChallengeManager()
 
-    return Base64.encodeToString(bytes, Base64.NO_WRAP)
+    return manager.getRandomBase64String(byteLength)
   }
 
   companion object {