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/k3/a.java

@@ -0,0 +1,61 @@
+package k3;
+
+import i3.l;
+import i3.o;
+import java.io.IOException;
+import kotlin.jvm.internal.Intrinsics;
+import r3.C;
+import r3.C0576h;
+import r3.I;
+import r3.K;
+import r3.q;
+
+/* loaded from: classes3.dex */
+public abstract class a implements I {
+
+    /* renamed from: a, reason: collision with root package name */
+    public final q f7097a;
+
+    /* renamed from: b, reason: collision with root package name */
+    public boolean f7098b;
+
+    /* renamed from: c, reason: collision with root package name */
+    public final /* synthetic */ o f7099c;
+
+    public a(o oVar) {
+        this.f7099c = oVar;
+        this.f7097a = new q(((C) oVar.f6895d).f8245a.timeout());
+    }
+
+    public final void d() {
+        o oVar = this.f7099c;
+        int i = oVar.f6892a;
+        if (i == 6) {
+            return;
+        }
+        if (i == 5) {
+            o.i(oVar, this.f7097a);
+            oVar.f6892a = 6;
+        } else {
+            throw new IllegalStateException("state: " + oVar.f6892a);
+        }
+    }
+
+    @Override // r3.I
+    public long read(C0576h sink, long j4) {
+        o oVar = this.f7099c;
+        Intrinsics.checkNotNullParameter(sink, "sink");
+        try {
+            return ((C) oVar.f6895d).read(sink, j4);
+        } catch (IOException e4) {
+            ((l) oVar.f6894c).k();
+            this.d();
+            throw e4;
+        }
+    }
+
+    @Override // r3.I
+    public final K timeout() {
+        return this.f7097a;
+    }
+}

apk_decompiled/sources/k3/b.java

@@ -0,0 +1,73 @@
+package k3;
+
+import i3.o;
+import kotlin.jvm.internal.Intrinsics;
+import r3.B;
+import r3.C0576h;
+import r3.G;
+import r3.K;
+import r3.q;
+
+/* loaded from: classes3.dex */
+public final class b implements G {
+
+    /* renamed from: a, reason: collision with root package name */
+    public final q f7100a;
+
+    /* renamed from: b, reason: collision with root package name */
+    public boolean f7101b;
+
+    /* renamed from: c, reason: collision with root package name */
+    public final /* synthetic */ o f7102c;
+
+    public b(o oVar) {
+        this.f7102c = oVar;
+        this.f7100a = new q(((B) oVar.f6896e).f8242a.timeout());
+    }
+
+    @Override // r3.G, java.io.Closeable, java.lang.AutoCloseable
+    public final synchronized void close() {
+        if (this.f7101b) {
+            return;
+        }
+        this.f7101b = true;
+        ((B) this.f7102c.f6896e).Q("0\r\n\r\n");
+        o.i(this.f7102c, this.f7100a);
+        this.f7102c.f6892a = 3;
+    }
+
+    @Override // r3.G, java.io.Flushable
+    public final synchronized void flush() {
+        if (this.f7101b) {
+            return;
+        }
+        ((B) this.f7102c.f6896e).flush();
+    }
+
+    @Override // r3.G
+    public final K timeout() {
+        return this.f7100a;
+    }
+
+    @Override // r3.G
+    public final void z(C0576h source, long j4) {
+        Intrinsics.checkNotNullParameter(source, "source");
+        if (this.f7101b) {
+            throw new IllegalStateException("closed");
+        }
+        if (j4 == 0) {
+            return;
+        }
+        o oVar = this.f7102c;
+        B b4 = (B) oVar.f6896e;
+        if (b4.f8244c) {
+            throw new IllegalStateException("closed");
+        }
+        b4.f8243b.l0(j4);
+        b4.d();
+        B b5 = (B) oVar.f6896e;
+        b5.Q("\r\n");
+        b5.z(source, j4);
+        b5.Q("\r\n");
+    }
+}

apk_decompiled/sources/k3/c.java

@@ -0,0 +1,69 @@
+package k3;
+
+import e3.w;
+import i3.l;
+import i3.o;
+import java.util.concurrent.TimeUnit;
+import kotlin.jvm.internal.Intrinsics;
+
+/* loaded from: classes3.dex */
+public final class c extends a {
+
+    /* renamed from: d, reason: collision with root package name */
+    public final w f7103d;
+
+    /* renamed from: e, reason: collision with root package name */
+    public long f7104e;
+
+    /* renamed from: f, reason: collision with root package name */
+    public boolean f7105f;
+
+    /* renamed from: g, reason: collision with root package name */
+    public final /* synthetic */ o f7106g;
+
+    /* JADX WARN: 'super' call moved to the top of the method (can break code semantics) */
+    public c(o oVar, w url) {
+        super(oVar);
+        Intrinsics.checkNotNullParameter(url, "url");
+        this.f7106g = oVar;
+        this.f7103d = url;
+        this.f7104e = -1L;
+        this.f7105f = true;
+    }
+
+    @Override // java.io.Closeable, java.lang.AutoCloseable
+    public final void close() {
+        if (this.f7098b) {
+            return;
+        }
+        if (this.f7105f) {
+            TimeUnit timeUnit = TimeUnit.MILLISECONDS;
+            if (!f3.c.g(this)) {
+                ((l) this.f7106g.f6894c).k();
+                d();
+            }
+        }
+        this.f7098b = true;
+    }
+
+    /* JADX WARN: Code restructure failed: missing block: B:27:0x0066, code lost:
+    
+        if (r6 != false) goto L22;
+     */
+    /* JADX WARN: Code restructure failed: missing block: B:32:0x0095, code lost:
+    
+        if (r10.f7105f == false) goto L27;
+     */
+    @Override // k3.a, r3.I
+    /*
+        Code decompiled incorrectly, please refer to instructions dump.
+        To view partially-correct add '--show-bad-code' argument
+    */
+    public final long read(r3.C0576h r11, long r12) {
+        /*
+            Method dump skipped, instructions count: 253
+            To view this dump add '--comments-level debug' option
+        */
+        throw new UnsupportedOperationException("Method not decompiled: k3.c.read(r3.h, long):long");
+    }
+}

apk_decompiled/sources/k3/d.java

@@ -0,0 +1,72 @@
+package k3;
+
+import C.w;
+import i3.l;
+import i3.o;
+import java.net.ProtocolException;
+import java.util.concurrent.TimeUnit;
+import kotlin.jvm.internal.Intrinsics;
+import r3.C0576h;
+
+/* loaded from: classes3.dex */
+public final class d extends a {
+
+    /* renamed from: d, reason: collision with root package name */
+    public long f7107d;
+
+    /* renamed from: e, reason: collision with root package name */
+    public final /* synthetic */ o f7108e;
+
+    /* JADX WARN: 'super' call moved to the top of the method (can break code semantics) */
+    public d(o oVar, long j4) {
+        super(oVar);
+        this.f7108e = oVar;
+        this.f7107d = j4;
+        if (j4 == 0) {
+            d();
+        }
+    }
+
+    @Override // java.io.Closeable, java.lang.AutoCloseable
+    public final void close() {
+        if (this.f7098b) {
+            return;
+        }
+        if (this.f7107d != 0) {
+            TimeUnit timeUnit = TimeUnit.MILLISECONDS;
+            if (!f3.c.g(this)) {
+                ((l) this.f7108e.f6894c).k();
+                d();
+            }
+        }
+        this.f7098b = true;
+    }
+
+    @Override // k3.a, r3.I
+    public final long read(C0576h sink, long j4) {
+        Intrinsics.checkNotNullParameter(sink, "sink");
+        if (j4 < 0) {
+            throw new IllegalArgumentException(w.l("byteCount < 0: ", j4).toString());
+        }
+        if (this.f7098b) {
+            throw new IllegalStateException("closed");
+        }
+        long j5 = this.f7107d;
+        if (j5 == 0) {
+            return -1L;
+        }
+        long read = super.read(sink, Math.min(j5, j4));
+        if (read == -1) {
+            ((l) this.f7108e.f6894c).k();
+            ProtocolException protocolException = new ProtocolException("unexpected end of stream");
+            d();
+            throw protocolException;
+        }
+        long j6 = this.f7107d - read;
+        this.f7107d = j6;
+        if (j6 == 0) {
+            d();
+        }
+        return read;
+    }
+}

apk_decompiled/sources/k3/e.java

@@ -0,0 +1,65 @@
+package k3;
+
+import i3.o;
+import kotlin.jvm.internal.Intrinsics;
+import r3.B;
+import r3.C0576h;
+import r3.G;
+import r3.K;
+import r3.q;
+
+/* loaded from: classes3.dex */
+public final class e implements G {
+
+    /* renamed from: a, reason: collision with root package name */
+    public final q f7109a;
+
+    /* renamed from: b, reason: collision with root package name */
+    public boolean f7110b;
+
+    /* renamed from: c, reason: collision with root package name */
+    public final /* synthetic */ o f7111c;
+
+    public e(o oVar) {
+        this.f7111c = oVar;
+        this.f7109a = new q(((B) oVar.f6896e).f8242a.timeout());
+    }
+
+    @Override // r3.G, java.io.Closeable, java.lang.AutoCloseable
+    public final void close() {
+        if (this.f7110b) {
+            return;
+        }
+        this.f7110b = true;
+        o oVar = this.f7111c;
+        o.i(oVar, this.f7109a);
+        oVar.f6892a = 3;
+    }
+
+    @Override // r3.G, java.io.Flushable
+    public final void flush() {
+        if (this.f7110b) {
+            return;
+        }
+        ((B) this.f7111c.f6896e).flush();
+    }
+
+    @Override // r3.G
+    public final K timeout() {
+        return this.f7109a;
+    }
+
+    @Override // r3.G
+    public final void z(C0576h source, long j4) {
+        Intrinsics.checkNotNullParameter(source, "source");
+        if (this.f7110b) {
+            throw new IllegalStateException("closed");
+        }
+        long j5 = source.f8284b;
+        byte[] bArr = f3.c.f6469a;
+        if (j4 < 0 || 0 > j5 || j5 < j4) {
+            throw new ArrayIndexOutOfBoundsException();
+        }
+        ((B) this.f7111c.f6896e).z(source, j4);
+    }
+}

apk_decompiled/sources/k3/f.java

@@ -0,0 +1,44 @@
+package k3;
+
+import C.w;
+import kotlin.jvm.internal.Intrinsics;
+import r3.C0576h;
+
+/* loaded from: classes3.dex */
+public final class f extends a {
+
+    /* renamed from: d, reason: collision with root package name */
+    public boolean f7112d;
+
+    @Override // java.io.Closeable, java.lang.AutoCloseable
+    public final void close() {
+        if (this.f7098b) {
+            return;
+        }
+        if (!this.f7112d) {
+            d();
+        }
+        this.f7098b = true;
+    }
+
+    @Override // k3.a, r3.I
+    public final long read(C0576h sink, long j4) {
+        Intrinsics.checkNotNullParameter(sink, "sink");
+        if (j4 < 0) {
+            throw new IllegalArgumentException(w.l("byteCount < 0: ", j4).toString());
+        }
+        if (this.f7098b) {
+            throw new IllegalStateException("closed");
+        }
+        if (this.f7112d) {
+            return -1L;
+        }
+        long read = super.read(sink, j4);
+        if (read != -1) {
+            return read;
+        }
+        this.f7112d = true;
+        d();
+        return -1L;
+    }
+}