From 355a847b1ccd69c4ab2c356395c97b4871e53f1f Mon Sep 17 00:00:00 2001
From: 1fexd <PGFvy85nC@protonmail.com>
Date: Sun, 15 Jan 2023 17:01:43 +0100
Subject: [PATCH] feat(id-austria): `spoof-signature` patch

---
 .../fingerprints/SpoofSignatureFingerprint.kt | 13 ++++++
 .../signature/patch/SpoofSignaturePatch.kt    | 44 +++++++++++++++++++
 2 files changed, 57 insertions(+)
 create mode 100644 src/main/kotlin/app/revanced/patches/idaustria/detection/signature/fingerprints/SpoofSignatureFingerprint.kt
 create mode 100644 src/main/kotlin/app/revanced/patches/idaustria/detection/signature/patch/SpoofSignaturePatch.kt

diff --git a/src/main/kotlin/app/revanced/patches/idaustria/detection/signature/fingerprints/SpoofSignatureFingerprint.kt b/src/main/kotlin/app/revanced/patches/idaustria/detection/signature/fingerprints/SpoofSignatureFingerprint.kt
new file mode 100644
index 000000000..34aa826a3
--- /dev/null
+++ b/src/main/kotlin/app/revanced/patches/idaustria/detection/signature/fingerprints/SpoofSignatureFingerprint.kt
@@ -0,0 +1,13 @@
+package app.revanced.patches.idaustria.detection.signature.fingerprints
+
+import app.revanced.patcher.fingerprint.method.impl.MethodFingerprint
+import org.jf.dexlib2.AccessFlags
+
+object SpoofSignatureFingerprint : MethodFingerprint(
+    "L",
+    parameters = listOf("L"),
+    access = AccessFlags.PRIVATE.value,
+    customFingerprint = { methodDef ->
+        methodDef.definingClass.endsWith("/SL2Step1Task;") && methodDef.name == "getPubKey"
+    }
+)
diff --git a/src/main/kotlin/app/revanced/patches/idaustria/detection/signature/patch/SpoofSignaturePatch.kt b/src/main/kotlin/app/revanced/patches/idaustria/detection/signature/patch/SpoofSignaturePatch.kt
new file mode 100644
index 000000000..c1903383b
--- /dev/null
+++ b/src/main/kotlin/app/revanced/patches/idaustria/detection/signature/patch/SpoofSignaturePatch.kt
@@ -0,0 +1,44 @@
+package app.revanced.patches.idaustria.detection.signature.patch
+
+import app.revanced.patcher.annotation.*
+import app.revanced.patcher.data.BytecodeContext
+import app.revanced.patcher.extensions.addInstructions
+import app.revanced.patcher.patch.BytecodePatch
+import app.revanced.patcher.patch.PatchResult
+import app.revanced.patcher.patch.PatchResultSuccess
+import app.revanced.patcher.patch.annotations.Patch
+import app.revanced.patches.idaustria.detection.signature.fingerprints.SpoofSignatureFingerprint
+
+@Patch
+@Name("spoof-signature")
+@Description("Spoofs the signature of the app.")
+@Compatibility([Package("at.gv.oe.app", arrayOf("2.5.2"))])
+@Version("0.0.1")
+class SpoofSignaturePatch : BytecodePatch(
+    listOf(SpoofSignatureFingerprint)
+) {
+    companion object {
+        const val EXPECTED_SIGNATURE = "OpenSSLRSAPublicKey{modulus=ac3e6fd6050aa7e0d6010ae58190404cd89a56935b44f6fee" +
+                "067c149768320026e10b24799a1339e414605e448e3f264444a327b9ae292be2b62ad567dd1800dbed4a88f718a33dc6db6b" +
+                "f5178aa41aa0efff8a3409f5ca95dbfccd92c7b4298966df806ea7a0204a00f0e745f6d9f13bdf24f3df715d7b62c1600906" +
+                "15de1c8a956b9286764985a3b3c060963c435fb9481a5543aaf0671fc2dba6c5c2b17d1ef1d85137f14dc9bbdf3490288087" +
+                "324cd48341cce64fabf6a9b55d1a7bf23b2fcdff451fd85bf0c7feb0a5e884d7c5c078e413149566a12a686e6efa70ae5161" +
+                "a0201307692834cda336c55157fef125e67c01c1359886f94742105596b42a790404bbcda5dad6a65f115aaff5e45ef3c28b" +
+                "2316ff6cef07aa49a45aa58c07bf258051b13ef449ccb37a3679afd5cfb9132f70bb9d931a937897544f90c3bcc80ed012e9" +
+                "f6ba020b8cdc23f8c29ac092b88f0e370ff9434e4f0f359e614ae0868dc526fa41e4b7596533e8d10279b66e923ecd9f0b20" +
+                "0def55be2c1f6f9c72c92fb45d7e0a9ac571cb38f0a9a37bb33ea06f223fde8c7a92e8c47769e386f9799776e8f110c21df2" +
+                "77ef1be61b2c01ebdabddcbf53cc4b6fd9a3c445606ee77b3758162c80ad8f8137b3c6864e92db904807dcb2be9d7717dd21" +
+                "bf42c121d620ddfb7914f7a95c713d9e1c1b7bdb4a03d618e40cf7e9e235c0b5687e03b7ab3,publicExponent=10001}"
+    }
+
+    override fun execute(context: BytecodeContext): PatchResult {
+        SpoofSignatureFingerprint.result!!.mutableMethod.addInstructions(
+            0,
+            """
+                const-string v0, "$EXPECTED_SIGNATURE"
+                return-object v0 
+            """
+        )
+        return PatchResultSuccess()
+    }
+}