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/kotlin/random/XorWowRandom.java

@@ -0,0 +1,72 @@
+package kotlin.random;
+
+import com.adif.elcanomovil.widget.DefaultWidgetPayloadHandler;
+import java.io.Serializable;
+import kotlin.Metadata;
+import kotlin.jvm.internal.DefaultConstructorMarker;
+import kotlin.jvm.internal.SourceDebugExtension;
+
+@Metadata(d1 = {"\u0000\u001a\n\u0002\u0018\u0002\n\u0002\u0018\u0002\n\u0002\u0018\u0002\n\u0002\u0018\u0002\n\u0000\n\u0002\u0010\b\n\u0002\b\u000e\b\u0000\u0018\u0000 \u00122\u00020\u00012\u00060\u0002j\u0002`\u0003:\u0001\u0012B\u0017\b\u0010\u0012\u0006\u0010\u0004\u001a\u00020\u0005\u0012\u0006\u0010\u0006\u001a\u00020\u0005¢\u0006\u0002\u0010\u0007B7\b\u0000\u0012\u0006\u0010\b\u001a\u00020\u0005\u0012\u0006\u0010\t\u001a\u00020\u0005\u0012\u0006\u0010\n\u001a\u00020\u0005\u0012\u0006\u0010\u000b\u001a\u00020\u0005\u0012\u0006\u0010\f\u001a\u00020\u0005\u0012\u0006\u0010\r\u001a\u00020\u0005¢\u0006\u0002\u0010\u000eJ\u0010\u0010\u000f\u001a\u00020\u00052\u0006\u0010\u0010\u001a\u00020\u0005H\u0016J\b\u0010\u0011\u001a\u00020\u0005H\u0016R\u000e\u0010\r\u001a\u00020\u0005X\u0082\u000e¢\u0006\u0002\n\u0000R\u000e\u0010\f\u001a\u00020\u0005X\u0082\u000e¢\u0006\u0002\n\u0000R\u000e\u0010\u000b\u001a\u00020\u0005X\u0082\u000e¢\u0006\u0002\n\u0000R\u000e\u0010\b\u001a\u00020\u0005X\u0082\u000e¢\u0006\u0002\n\u0000R\u000e\u0010\t\u001a\u00020\u0005X\u0082\u000e¢\u0006\u0002\n\u0000R\u000e\u0010\n\u001a\u00020\u0005X\u0082\u000e¢\u0006\u0002\n\u0000¨\u0006\u0013"}, d2 = {"Lkotlin/random/XorWowRandom;", "Lkotlin/random/Random;", "Ljava/io/Serializable;", "Lkotlin/io/Serializable;", "seed1", "", "seed2", "(II)V", "x", "y", "z", DefaultWidgetPayloadHandler.IS_WIDGET_JSON_TYPE, "v", "addend", "(IIIIII)V", "nextBits", "bitCount", "nextInt", "Companion", "kotlin-stdlib"}, k = 1, mv = {1, 9, 0}, xi = 48)
+@SourceDebugExtension({"SMAP\nXorWowRandom.kt\nKotlin\n*S Kotlin\n*F\n+ 1 XorWowRandom.kt\nkotlin/random/XorWowRandom\n+ 2 fake.kt\nkotlin/jvm/internal/FakeKt\n*L\n1#1,60:1\n1#2:61\n*E\n"})
+/* loaded from: classes3.dex */
+public final class XorWowRandom extends Random implements Serializable {
+    private static final Companion Companion = new Companion(null);
+    private static final long serialVersionUID = 0;
+    private int addend;
+    private int v;
+    private int w;
+    private int x;
+    private int y;
+    private int z;
+
+    @Metadata(d1 = {"\u0000\u0012\n\u0002\u0018\u0002\n\u0002\u0010\u0000\n\u0002\b\u0002\n\u0002\u0010\t\n\u0000\b\u0082\u0003\u0018\u00002\u00020\u0001B\u0007\b\u0002¢\u0006\u0002\u0010\u0002R\u000e\u0010\u0003\u001a\u00020\u0004X\u0082T¢\u0006\u0002\n\u0000¨\u0006\u0005"}, d2 = {"Lkotlin/random/XorWowRandom$Companion;", "", "()V", "serialVersionUID", "", "kotlin-stdlib"}, k = 1, mv = {1, 9, 0}, xi = 48)
+    /* loaded from: classes3.dex */
+    public static final class Companion {
+        public /* synthetic */ Companion(DefaultConstructorMarker defaultConstructorMarker) {
+            this();
+        }
+
+        private Companion() {
+        }
+    }
+
+    public XorWowRandom(int i, int i4, int i5, int i6, int i7, int i8) {
+        this.x = i;
+        this.y = i4;
+        this.z = i5;
+        this.w = i6;
+        this.v = i7;
+        this.addend = i8;
+        if ((i | i4 | i5 | i6 | i7) == 0) {
+            throw new IllegalArgumentException("Initial state must have at least one non-zero element.");
+        }
+        for (int i9 = 0; i9 < 64; i9++) {
+            nextInt();
+        }
+    }
+
+    @Override // kotlin.random.Random
+    public int nextBits(int bitCount) {
+        return RandomKt.takeUpperBits(nextInt(), bitCount);
+    }
+
+    @Override // kotlin.random.Random
+    public int nextInt() {
+        int i = this.x;
+        int i4 = i ^ (i >>> 2);
+        this.x = this.y;
+        this.y = this.z;
+        this.z = this.w;
+        int i5 = this.v;
+        this.w = i5;
+        int i6 = ((i4 ^ (i4 << 1)) ^ i5) ^ (i5 << 4);
+        this.v = i6;
+        int i7 = this.addend + 362437;
+        this.addend = i7;
+        return i6 + i7;
+    }
+
+    public XorWowRandom(int i, int i4) {
+        this(i, i4, 0, 0, ~i, (i << 10) ^ (i4 >>> 4));
+    }
+}