fix(Sync for Reddit - Spoof client): Use www instead of ssl API to fix auth related issues

Author: oSumAtrIX

patches/src/main/kotlin/app/revanced/patches/reddit/customclients/redditisfun/api/SpoofClientPatch.kt

@@ -61,7 +61,7 @@ val spoofClientPatch = spoofClientPatch(redirectUri = "redditisfun://auth") { cl
         // region Patch miscellaneous.
 
         // Reddit messed up and does not append a redirect uri to the authorization url to old.reddit.com/login.
-        // Replace old.reddit.com with ssl.reddit.com to fix this.
+        // Replace old.reddit.com with www.reddit.com to fix this.
         buildAuthorizationStringFingerprint.method.apply {
             val index = indexOfFirstInstructionOrThrow {
                 getReference<StringReference>()?.contains("old.reddit.com") == true
@@ -70,7 +70,7 @@ val spoofClientPatch = spoofClientPatch(redirectUri = "redditisfun://auth") { cl
             val targetRegister = getInstruction<OneRegisterInstruction>(index).registerA
             replaceInstruction(
                 index,
-                "const-string v$targetRegister, \"https://ssl.reddit.com/api/v1/authorize.compact\"",
+                "const-string v$targetRegister, \"https://www.reddit.com/api/v1/authorize.compact\"",
             )
         }
 

patches/src/main/kotlin/app/revanced/patches/reddit/customclients/sync/syncforreddit/api/SpoofClientPatch.kt

@@ -4,6 +4,7 @@ import app.revanced.patcher.extensions.InstructionExtensions.getInstruction
 import app.revanced.patcher.extensions.InstructionExtensions.replaceInstruction
 import app.revanced.patches.reddit.customclients.spoofClientPatch
 import app.revanced.patches.reddit.customclients.sync.detection.piracy.disablePiracyDetectionPatch
+import app.revanced.patches.shared.misc.string.replaceStringPatch
 import app.revanced.util.returnEarly
 import com.android.tools.smali.dexlib2.iface.instruction.OneRegisterInstruction
 import com.android.tools.smali.dexlib2.iface.instruction.ReferenceInstruction
@@ -13,7 +14,12 @@ import java.util.Base64
 val spoofClientPatch = spoofClientPatch(
     redirectUri = "http://redditsync/auth",
 ) { clientIdOption ->
-    dependsOn(disablePiracyDetectionPatch)
+    dependsOn(
+        disablePiracyDetectionPatch,
+        // Redirects from SSL to WWW domain are bugged causing auth problems.
+        // Manually rewrite the URLs to fix this.
+        replaceStringPatch("ssl.reddit.com", "www.reddit.com")
+    )
 
     compatibleWith(
         "com.laurencedawson.reddit_sync",

patches/src/main/kotlin/app/revanced/patches/shared/misc/string/ReplaceStringPatch.kt

@@ -0,0 +1,39 @@
+package app.revanced.patches.shared.misc.string
+
+import app.revanced.patcher.extensions.InstructionExtensions.replaceInstruction
+import app.revanced.patcher.patch.bytecodePatch
+import app.revanced.patches.all.misc.transformation.transformInstructionsPatch
+import app.revanced.util.getReference
+import com.android.tools.smali.dexlib2.ReferenceType
+import com.android.tools.smali.dexlib2.iface.instruction.OneRegisterInstruction
+import com.android.tools.smali.dexlib2.iface.reference.StringReference
+import kotlin.text.contains
+
+fun replaceStringPatch(
+    from: String,
+    to: String
+) = bytecodePatch(
+    description = "Replaces occurrences of '$from' with '$to' in string references.",
+) {
+    dependsOn(
+        transformInstructionsPatch(
+            filterMap = filterMap@{ _, _, instruction, instructionIndex ->
+                if (instruction.opcode.referenceType != ReferenceType.STRING) return@filterMap null
+
+                val stringReference = instruction.getReference<StringReference>()!!.string
+                if (from !in stringReference) return@filterMap null
+
+                Triple(instructionIndex, instruction as OneRegisterInstruction, stringReference)
+            },
+            transform = transform@{ mutableMethod, entry ->
+                val (instructionIndex, instruction, stringReference) = entry
+
+                val newString = stringReference.replace(from, to)
+                mutableMethod.replaceInstruction(
+                    instructionIndex,
+                    "${instruction.opcode.name} v${instruction.registerA}, \"$newString\"",
+                )
+            },
+        )
+    )
+}