From a0aa2be86d25aab2803901b4100fdc75461e94bc Mon Sep 17 00:00:00 2001
From: oSumAtrIX <johan.melkonyan1@web.de>
Date: Thu, 5 Oct 2023 17:28:10 +0200
Subject: [PATCH] fix(Relay for Reddit - Spoof client): Prevent OAuth login
 being disabled remotely

---
 .../relayforreddit/api/SpoofClientPatch.kt    | 29 +++++++++++++++++--
 .../RedditCheckDisableAPIFingerprint.kt       |  9 ++++++
 2 files changed, 35 insertions(+), 3 deletions(-)
 create mode 100644 src/main/kotlin/app/revanced/patches/reddit/customclients/relayforreddit/api/fingerprints/RedditCheckDisableAPIFingerprint.kt

diff --git a/src/main/kotlin/app/revanced/patches/reddit/customclients/relayforreddit/api/SpoofClientPatch.kt b/src/main/kotlin/app/revanced/patches/reddit/customclients/relayforreddit/api/SpoofClientPatch.kt
index 690e17861..1606817c3 100644
--- a/src/main/kotlin/app/revanced/patches/reddit/customclients/relayforreddit/api/SpoofClientPatch.kt
+++ b/src/main/kotlin/app/revanced/patches/reddit/customclients/relayforreddit/api/SpoofClientPatch.kt
@@ -9,6 +9,9 @@ import app.revanced.patcher.patch.annotation.CompatiblePackage
 import app.revanced.patcher.patch.annotation.Patch
 import app.revanced.patches.reddit.customclients.AbstractSpoofClientPatch
 import app.revanced.patches.reddit.customclients.relayforreddit.api.fingerprints.*
+import com.android.tools.smali.dexlib2.Opcode
+import com.android.tools.smali.dexlib2.builder.instruction.BuilderInstruction10t
+import com.android.tools.smali.dexlib2.builder.instruction.BuilderInstruction21t
 import com.android.tools.smali.dexlib2.iface.instruction.OneRegisterInstruction
 
 @Patch(
@@ -28,7 +31,10 @@ object SpoofClientPatch : AbstractSpoofClientPatch(
         GetLoggedOutBearerTokenFingerprint,
         GetRefreshTokenFingerprint
     ),
-    miscellaneousFingerprints = listOf(SetRemoteConfigFingerprint)
+    miscellaneousFingerprints = listOf(
+        SetRemoteConfigFingerprint,
+        RedditCheckDisableAPIFingerprint
+    )
 ) {
     override fun List<MethodFingerprintResult>.patchClientId(context: BytecodeContext) {
         forEach {
@@ -44,7 +50,24 @@ object SpoofClientPatch : AbstractSpoofClientPatch(
         }
     }
 
-    override fun List<MethodFingerprintResult>.patchMiscellaneous(context: BytecodeContext) =
-        // Do not load remote config which disables OAuth login remotely
+    override fun List<MethodFingerprintResult>.patchMiscellaneous(context: BytecodeContext) {
+        // Do not load remote config which disables OAuth login remotely.
         first().mutableMethod.addInstructions(0, "return-void")
+
+        // Prevent OAuth login being disabled remotely.
+        last().let {
+            val checkIsOAuthRequestIndex = it.scanResult.patternScanResult!!.startIndex
+
+            it.mutableMethod.apply {
+                val returnNextChain = getInstruction<BuilderInstruction21t>(checkIsOAuthRequestIndex).target
+                replaceInstruction(
+                    checkIsOAuthRequestIndex,
+                    BuilderInstruction10t(
+                        Opcode.GOTO,
+                        returnNextChain
+                    )
+                )
+            }
+        }
+    }
 }
\ No newline at end of file
diff --git a/src/main/kotlin/app/revanced/patches/reddit/customclients/relayforreddit/api/fingerprints/RedditCheckDisableAPIFingerprint.kt b/src/main/kotlin/app/revanced/patches/reddit/customclients/relayforreddit/api/fingerprints/RedditCheckDisableAPIFingerprint.kt
new file mode 100644
index 000000000..fc0cee335
--- /dev/null
+++ b/src/main/kotlin/app/revanced/patches/reddit/customclients/relayforreddit/api/fingerprints/RedditCheckDisableAPIFingerprint.kt
@@ -0,0 +1,9 @@
+package app.revanced.patches.reddit.customclients.relayforreddit.api.fingerprints
+
+import app.revanced.patcher.fingerprint.method.impl.MethodFingerprint
+import com.android.tools.smali.dexlib2.Opcode
+
+object RedditCheckDisableAPIFingerprint : MethodFingerprint(
+    strings = listOf("Reddit Disabled"),
+    opcodes = listOf(Opcode.IF_EQZ)
+)
\ No newline at end of file