Primer paso de la investigacion. Se aportan el .apk, las carpetas con el apk extraido y el apk descompilado. El archivo API_DOCUMENTATION.md es un archivo donde se anotaran los descubrimientos del funcionamiento de la API, y los .py son scripts para probar la funcionalidad de la API con los métodos que vayamos encontrando. Finalmente, los archivos .js son scripts de Frida para extraer informacion de la APP durante la ejecucion.

apk_decompiled/sources/com/google/firebase/auth/FirebaseAuthException.java

@@ -0,0 +1,18 @@
+package com.google.firebase.auth;
+
+import com.google.android.gms.common.internal.Preconditions;
+import com.google.firebase.FirebaseException;
+
+/* loaded from: classes3.dex */
+public class FirebaseAuthException extends FirebaseException {
+    private final String zza;
+
+    public FirebaseAuthException(String str, String str2) {
+        super(str2);
+        this.zza = Preconditions.checkNotEmpty(str);
+    }
+
+    public String getErrorCode() {
+        return this.zza;
+    }
+}

apk_decompiled/sources/com/google/firebase/auth/GetTokenResult.java

@@ -0,0 +1,62 @@
+package com.google.firebase.auth;
+
+import com.google.android.gms.common.annotation.KeepForSdk;
+import com.google.firebase.remoteconfig.RemoteConfigComponent;
+import java.util.Map;
+
+/* loaded from: classes3.dex */
+public class GetTokenResult {
+    private String zza;
+    private Map<String, Object> zzb;
+
+    @KeepForSdk
+    public GetTokenResult(String str, Map<String, Object> map) {
+        this.zza = str;
+        this.zzb = map;
+    }
+
+    private final long zza(String str) {
+        Integer num = (Integer) this.zzb.get(str);
+        if (num == null) {
+            return 0L;
+        }
+        return num.longValue();
+    }
+
+    public long getAuthTimestamp() {
+        return zza("auth_time");
+    }
+
+    public Map<String, Object> getClaims() {
+        return this.zzb;
+    }
+
+    public long getExpirationTimestamp() {
+        return zza("exp");
+    }
+
+    public long getIssuedAtTimestamp() {
+        return zza("iat");
+    }
+
+    public String getSignInProvider() {
+        Map map = (Map) this.zzb.get(RemoteConfigComponent.DEFAULT_NAMESPACE);
+        if (map != null) {
+            return (String) map.get("sign_in_provider");
+        }
+        return null;
+    }
+
+    @KeepForSdk
+    public String getSignInSecondFactor() {
+        Map map = (Map) this.zzb.get(RemoteConfigComponent.DEFAULT_NAMESPACE);
+        if (map != null) {
+            return (String) map.get("sign_in_second_factor");
+        }
+        return null;
+    }
+
+    public String getToken() {
+        return this.zza;
+    }
+}

apk_decompiled/sources/com/google/firebase/auth/internal/IdTokenListener.java

@@ -0,0 +1,11 @@
+package com.google.firebase.auth.internal;
+
+import com.google.android.gms.common.annotation.KeepForSdk;
+import com.google.firebase.internal.InternalTokenResult;
+
+@KeepForSdk
+/* loaded from: classes3.dex */
+public interface IdTokenListener {
+    @KeepForSdk
+    void onIdTokenChanged(InternalTokenResult internalTokenResult);
+}

apk_decompiled/sources/com/google/firebase/auth/internal/InternalAuthProvider.java

@@ -0,0 +1,25 @@
+package com.google.firebase.auth.internal;
+
+import com.google.android.gms.common.annotation.KeepForSdk;
+import com.google.android.gms.tasks.Task;
+import com.google.firebase.annotations.DeferredApi;
+import com.google.firebase.auth.GetTokenResult;
+import com.google.firebase.internal.InternalTokenProvider;
+
+@KeepForSdk
+/* loaded from: classes3.dex */
+public interface InternalAuthProvider extends InternalTokenProvider {
+    @KeepForSdk
+    @DeferredApi
+    void addIdTokenListener(IdTokenListener idTokenListener);
+
+    @Override // com.google.firebase.internal.InternalTokenProvider
+    @KeepForSdk
+    Task<GetTokenResult> getAccessToken(boolean z3);
+
+    @Override // com.google.firebase.internal.InternalTokenProvider
+    String getUid();
+
+    @KeepForSdk
+    void removeIdTokenListener(IdTokenListener idTokenListener);
+}

apk_decompiled/sources/com/google/firebase/auth/internal/R.java

@@ -0,0 +1,7 @@
+package com.google.firebase.auth.internal;
+
+/* loaded from: classes3.dex */
+public final class R {
+    private R() {
+    }
+}