From 5f81b40e7d5567fb5689d08ccc9caeaa267c3143 Mon Sep 17 00:00:00 2001
From: epireyn <48213068+epireyn@users.noreply.github.com>
Date: Sat, 20 Jul 2024 06:00:19 +0200
Subject: [PATCH] feat: Add `Hide mock location` patch (#3417)

Co-authored-by: oSumAtrIX <johan.melkonyan1@web.de>
---
 api/revanced-patches.api                      |  8 +++
 .../location/hide/HideMockLocationPatch.kt    | 56 +++++++++++++++++++
 2 files changed, 64 insertions(+)
 create mode 100644 src/main/kotlin/app/revanced/patches/all/location/hide/HideMockLocationPatch.kt

diff --git a/api/revanced-patches.api b/api/revanced-patches.api
index a93bca3da3..a602a5b4c5 100644
--- a/api/revanced-patches.api
+++ b/api/revanced-patches.api
@@ -22,6 +22,14 @@ public final class app/revanced/patches/all/interaction/gestures/PredictiveBackG
 	public fun execute (Lapp/revanced/patcher/data/ResourceContext;)V
 }
 
+public final class app/revanced/patches/all/location/hide/HideMockLocationPatch : app/revanced/patches/all/misc/transformation/BaseTransformInstructionsPatch {
+	public static final field INSTANCE Lapp/revanced/patches/all/location/hide/HideMockLocationPatch;
+	public synthetic fun filterMap (Lcom/android/tools/smali/dexlib2/iface/ClassDef;Lcom/android/tools/smali/dexlib2/iface/Method;Lcom/android/tools/smali/dexlib2/iface/instruction/Instruction;I)Ljava/lang/Object;
+	public fun filterMap (Lcom/android/tools/smali/dexlib2/iface/ClassDef;Lcom/android/tools/smali/dexlib2/iface/Method;Lcom/android/tools/smali/dexlib2/iface/instruction/Instruction;I)Lkotlin/Pair;
+	public synthetic fun transform (Lapp/revanced/patcher/util/proxy/mutableTypes/MutableMethod;Ljava/lang/Object;)V
+	public fun transform (Lapp/revanced/patcher/util/proxy/mutableTypes/MutableMethod;Lkotlin/Pair;)V
+}
+
 public final class app/revanced/patches/all/misc/debugging/EnableAndroidDebuggingPatch : app/revanced/patcher/patch/ResourcePatch {
 	public static final field INSTANCE Lapp/revanced/patches/all/misc/debugging/EnableAndroidDebuggingPatch;
 	public synthetic fun execute (Lapp/revanced/patcher/data/Context;)V
diff --git a/src/main/kotlin/app/revanced/patches/all/location/hide/HideMockLocationPatch.kt b/src/main/kotlin/app/revanced/patches/all/location/hide/HideMockLocationPatch.kt
new file mode 100644
index 0000000000..235a3f7bf8
--- /dev/null
+++ b/src/main/kotlin/app/revanced/patches/all/location/hide/HideMockLocationPatch.kt
@@ -0,0 +1,56 @@
+@file:Suppress("unused")
+
+package app.revanced.patches.all.location.hide
+
+import app.revanced.patcher.extensions.InstructionExtensions.replaceInstruction
+import app.revanced.patcher.patch.annotation.Patch
+import app.revanced.patcher.util.proxy.mutableTypes.MutableMethod
+import app.revanced.patches.all.misc.transformation.BaseTransformInstructionsPatch
+import app.revanced.patches.all.misc.transformation.IMethodCall
+import app.revanced.patches.all.misc.transformation.fromMethodReference
+import app.revanced.util.getReference
+import com.android.tools.smali.dexlib2.iface.ClassDef
+import com.android.tools.smali.dexlib2.iface.Method
+import com.android.tools.smali.dexlib2.iface.instruction.FiveRegisterInstruction
+import com.android.tools.smali.dexlib2.iface.instruction.Instruction
+import com.android.tools.smali.dexlib2.iface.reference.MethodReference
+
+@Patch(
+    name = "Hide mock location",
+    description = "Prevents the app from knowing the device location is being mocked by a third party app.",
+    use = false
+)
+object HideMockLocationPatch : BaseTransformInstructionsPatch<Pair<Instruction, Int>>() {
+    override fun filterMap(
+        classDef: ClassDef,
+        method: Method,
+        instruction: Instruction,
+        instructionIndex: Int
+    ): Pair<Instruction, Int>? {
+        val reference = instruction.getReference<MethodReference>() ?: return null
+        if (fromMethodReference<MethodCall>(reference) == null) return null
+
+        return instruction to instructionIndex
+    }
+
+    override fun transform(mutableMethod: MutableMethod, entry: Pair<Instruction, Int>) {
+        val (instruction, index) = entry
+        instruction as FiveRegisterInstruction
+
+        // Replace return value with a constant `false` boolean.
+        mutableMethod.replaceInstruction(
+            index + 1,
+            "const/4 v${instruction.registerC}, 0x0"
+        )
+    }
+}
+
+private enum class MethodCall(
+    override val definedClassName: String,
+    override val methodName: String,
+    override val methodParams: Array<String>,
+    override val returnType: String
+) : IMethodCall {
+    IsMock("Landroid/location/Location;", "isMock", emptyArray(), "Z"),
+    IsFromMockProvider("Landroid/location/Location;", "isFromMockProvider", emptyArray(), "Z")
+}