From 0693212ba568b58ad9fcddebe30ca5f7604eec7d Mon Sep 17 00:00:00 2001
From: naijun0403 <naijun0403@gmail.com>
Date: Sat, 3 May 2025 19:25:46 +0900
Subject: [PATCH] feat(kakaotalk): Add patches for changing device model and
 disabling signature verification

---
 .../kakaotalk/changemodel/ChangeModelPatch.kt | 29 +++++++++++++++++++
 .../fingerprints/ChangeModelFingerprint.kt    | 12 ++++++++
 .../signature/VerifyingSignaturePatch.kt      | 24 +++++++++++++++
 .../VerifyingSignatureFingerprint.kt          | 12 ++++++++
 4 files changed, 77 insertions(+)
 create mode 100644 patches/src/main/kotlin/app/revanced/patches/kakaotalk/changemodel/ChangeModelPatch.kt
 create mode 100644 patches/src/main/kotlin/app/revanced/patches/kakaotalk/changemodel/fingerprints/ChangeModelFingerprint.kt
 create mode 100644 patches/src/main/kotlin/app/revanced/patches/kakaotalk/signature/VerifyingSignaturePatch.kt
 create mode 100644 patches/src/main/kotlin/app/revanced/patches/kakaotalk/signature/fingerprints/VerifyingSignatureFingerprint.kt

diff --git a/patches/src/main/kotlin/app/revanced/patches/kakaotalk/changemodel/ChangeModelPatch.kt b/patches/src/main/kotlin/app/revanced/patches/kakaotalk/changemodel/ChangeModelPatch.kt
new file mode 100644
index 000000000..87bdfd1d7
--- /dev/null
+++ b/patches/src/main/kotlin/app/revanced/patches/kakaotalk/changemodel/ChangeModelPatch.kt
@@ -0,0 +1,29 @@
+package app.revanced.patches.kakaotalk.changemodel
+
+import app.revanced.patcher.extensions.InstructionExtensions.addInstructions
+import app.revanced.patcher.patch.Package
+import app.revanced.patcher.patch.bytecodePatch
+import app.revanced.patcher.patch.stringOption
+import app.revanced.patches.kakaotalk.changemodel.fingerprints.changeModelFingerprint
+
+@Suppress("unused")
+val changeModelPatch = bytecodePatch(
+    name = "Change model",
+    description = "Changes the device model to supporting subdevice features",
+) {
+    val changeModelOption = stringOption(
+        "model", "SM-X926N"
+    )
+
+    compatibleWith(Package("com.kakao.talk", setOf("25.3.5")))
+
+    execute {
+        changeModelFingerprint.method.addInstructions(
+            0,
+            """
+                const-string v0, "${changeModelOption.value}"
+                return-object v0
+            """.trimIndent()
+        )
+    }
+}
\ No newline at end of file
diff --git a/patches/src/main/kotlin/app/revanced/patches/kakaotalk/changemodel/fingerprints/ChangeModelFingerprint.kt b/patches/src/main/kotlin/app/revanced/patches/kakaotalk/changemodel/fingerprints/ChangeModelFingerprint.kt
new file mode 100644
index 000000000..8d59e0fad
--- /dev/null
+++ b/patches/src/main/kotlin/app/revanced/patches/kakaotalk/changemodel/fingerprints/ChangeModelFingerprint.kt
@@ -0,0 +1,12 @@
+package app.revanced.patches.kakaotalk.changemodel.fingerprints
+
+import app.revanced.patcher.fingerprint
+
+@Suppress("unused")
+internal val changeModelFingerprint = fingerprint {
+    strings("MODEL", "\\s", "-", "US", "toUpperCase(...)")
+    custom {
+        _, classDef ->
+        classDef.methods.indexOf(classDef.methods.last()) > 2
+    }
+}
\ No newline at end of file
diff --git a/patches/src/main/kotlin/app/revanced/patches/kakaotalk/signature/VerifyingSignaturePatch.kt b/patches/src/main/kotlin/app/revanced/patches/kakaotalk/signature/VerifyingSignaturePatch.kt
new file mode 100644
index 000000000..fb200a087
--- /dev/null
+++ b/patches/src/main/kotlin/app/revanced/patches/kakaotalk/signature/VerifyingSignaturePatch.kt
@@ -0,0 +1,24 @@
+package app.revanced.patches.kakaotalk.signature
+
+import app.revanced.patcher.extensions.InstructionExtensions.addInstructions
+import app.revanced.patcher.patch.Package
+import app.revanced.patcher.patch.bytecodePatch
+import app.revanced.patches.memegenerator.detection.signature.verifySignatureFingerprint
+
+@Suppress("unused")
+val verifyingSignaturePatch = bytecodePatch(
+    name = "Disable verifying signature",
+    description = "Disables the signature verification check that prevents the app from running.",
+) {
+    compatibleWith(Package("com.kakao.talk", setOf("25.3.5")))
+
+    execute {
+        verifySignatureFingerprint.method.addInstructions(
+            0,
+            """
+                const/4 v0, 0x1
+                return v0
+            """.trimIndent()
+        )
+    }
+}
\ No newline at end of file
diff --git a/patches/src/main/kotlin/app/revanced/patches/kakaotalk/signature/fingerprints/VerifyingSignatureFingerprint.kt b/patches/src/main/kotlin/app/revanced/patches/kakaotalk/signature/fingerprints/VerifyingSignatureFingerprint.kt
new file mode 100644
index 000000000..d5bfb8aa5
--- /dev/null
+++ b/patches/src/main/kotlin/app/revanced/patches/kakaotalk/signature/fingerprints/VerifyingSignatureFingerprint.kt
@@ -0,0 +1,12 @@
+package app.revanced.patches.kakaotalk.signature.fingerprints
+
+import app.revanced.patcher.fingerprint
+import com.android.tools.smali.dexlib2.AccessFlags
+
+@Suppress("unused")
+internal val verifyingSignatureFingerprint = fingerprint {
+    accessFlags(AccessFlags.PUBLIC, AccessFlags.STATIC)
+    returns("Z")
+    parameters()
+    strings("getPackageName(...)")
+}
\ No newline at end of file