From a48c4a7cc1dbb3ecfce2e345240bca8142740b77 Mon Sep 17 00:00:00 2001
From: oSumAtrIX <johan.melkonyan1@web.de>
Date: Sun, 8 Oct 2023 01:45:07 +0200
Subject: [PATCH] fix(Sync for Reddit - Spoof client): Set user-agent for OAuth
 requests to fix login

---
 .../patches/reddit/customclients/Constants.kt   |  6 ++++++
 .../syncforreddit/api/SpoofClientPatch.kt       | 17 +++++++++++++++++
 .../fingerprints/LoadBrowserURLFingerprint.kt   | 10 ++++++++++
 3 files changed, 33 insertions(+)
 create mode 100644 src/main/kotlin/app/revanced/patches/reddit/customclients/Constants.kt
 create mode 100644 src/main/kotlin/app/revanced/patches/reddit/customclients/syncforreddit/api/fingerprints/LoadBrowserURLFingerprint.kt

diff --git a/src/main/kotlin/app/revanced/patches/reddit/customclients/Constants.kt b/src/main/kotlin/app/revanced/patches/reddit/customclients/Constants.kt
new file mode 100644
index 000000000..6891a97a8
--- /dev/null
+++ b/src/main/kotlin/app/revanced/patches/reddit/customclients/Constants.kt
@@ -0,0 +1,6 @@
+package app.revanced.patches.reddit.customclients
+
+object Constants {
+    const val OAUTH_USER_AGENT = "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) " +
+            "Chrome/117.0.0.0 Safari/537.36 Edg/117.0.2045.60"
+}
\ No newline at end of file
diff --git a/src/main/kotlin/app/revanced/patches/reddit/customclients/syncforreddit/api/SpoofClientPatch.kt b/src/main/kotlin/app/revanced/patches/reddit/customclients/syncforreddit/api/SpoofClientPatch.kt
index 9e91dcc6c..aab12bdc7 100644
--- a/src/main/kotlin/app/revanced/patches/reddit/customclients/syncforreddit/api/SpoofClientPatch.kt
+++ b/src/main/kotlin/app/revanced/patches/reddit/customclients/syncforreddit/api/SpoofClientPatch.kt
@@ -10,9 +10,11 @@ import app.revanced.patcher.fingerprint.method.impl.MethodFingerprintResult
 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.Constants.OAUTH_USER_AGENT
 import app.revanced.patches.reddit.customclients.syncforreddit.api.fingerprints.GetAuthorizationStringFingerprint
 import app.revanced.patches.reddit.customclients.syncforreddit.api.fingerprints.GetBearerTokenFingerprint
 import app.revanced.patches.reddit.customclients.syncforreddit.api.fingerprints.ImgurImageAPIFingerprint
+import app.revanced.patches.reddit.customclients.syncforreddit.api.fingerprints.LoadBrowserURLFingerprint
 import app.revanced.patches.reddit.customclients.syncforreddit.detection.piracy.DisablePiracyDetectionPatch
 import com.android.tools.smali.dexlib2.iface.instruction.OneRegisterInstruction
 import com.android.tools.smali.dexlib2.iface.instruction.ReferenceInstruction
@@ -33,6 +35,7 @@ import java.util.*
 object SpoofClientPatch : AbstractSpoofClientPatch(
     "http://redditsync/auth",
     clientIdFingerprints = listOf(GetAuthorizationStringFingerprint),
+    userAgentFingerprints = listOf(LoadBrowserURLFingerprint),
     miscellaneousFingerprints = listOf(ImgurImageAPIFingerprint)
 ) {
     override fun List<MethodFingerprintResult>.patchClientId(context: BytecodeContext) {
@@ -79,4 +82,18 @@ object SpoofClientPatch : AbstractSpoofClientPatch(
             "const-string v1, \"https://api.imgur.com/3/image\""
         )
     }
+
+    override fun List<MethodFingerprintResult>.patchUserAgent(context: BytecodeContext) {
+        first().let { result ->
+            val insertIndex = result.scanResult.patternScanResult!!.startIndex
+
+            result.mutableMethod.addInstructions(
+                insertIndex,
+                """
+                    const-string v0, "$OAUTH_USER_AGENT"
+                    invoke-virtual {p1, v0}, Landroid/webkit/WebSettings;->setUserAgentString(Ljava/lang/String;)V
+                """
+            )
+        }
+    }
 }
diff --git a/src/main/kotlin/app/revanced/patches/reddit/customclients/syncforreddit/api/fingerprints/LoadBrowserURLFingerprint.kt b/src/main/kotlin/app/revanced/patches/reddit/customclients/syncforreddit/api/fingerprints/LoadBrowserURLFingerprint.kt
new file mode 100644
index 000000000..67aba4295
--- /dev/null
+++ b/src/main/kotlin/app/revanced/patches/reddit/customclients/syncforreddit/api/fingerprints/LoadBrowserURLFingerprint.kt
@@ -0,0 +1,10 @@
+package app.revanced.patches.reddit.customclients.syncforreddit.api.fingerprints
+
+import app.revanced.patcher.fingerprint.method.impl.MethodFingerprint
+import com.android.tools.smali.dexlib2.Opcode
+
+object LoadBrowserURLFingerprint : MethodFingerprint(
+    parameters = listOf("Landroid/view/View;", "Landroid/os/Bundle;"),
+    opcodes = listOf(Opcode.CONST_4),
+    strings = listOf("CustomInterface")
+)
\ No newline at end of file