Merge pull request #1 from m1stadev/main

Cleanup + changes

.gitignore

@@ -0,0 +1,2 @@
+.DS_Store
+asr64_patcher

Makefile

@@ -0,0 +1,4 @@
+all:
+	gcc asr64_patcher.c -o asr64_patcher
+clean:
+	rm asr64_patcher

README.md

@@ -1,9 +1,20 @@
 # asr64_patcher
-Easily patch ASR on 64-bit devices.
-# how to use
+A tool to patch the signature checks of a 64-bit ASR binary.
 
-`asr64_patcher asr asr_patched`
+## Build
+`make`
 
-`ldid2 -e asr_patched > asr.xml`
+## Usage
+1. Extract binary from an iOS ramdisk (macOS only):
+    - `img4 -i <ramdisk> -o ramdisk.dmg`
+        - `img4` can be found [here](https://github.com/xerub/img4lib)
+    - `hdiutil attach ramdisk.dmg -mountpoint ramdisk`
+    - `cp ramdisk/usr/sbin/asr .`
+    - `hdiutil detach ramdisk`
 
-`ldid2 -Sasr.xml asr_patched`
+2. Run `asr64_patcher`:
+    - `asr64_patcher asr asr_patched`
+
+3. Resign patched ASR binary
+    - `ldid -e asr > ents.plist`
+    - `ldid -Sents.plist asr_patched`

asr64_patcher.c

@@ -130,8 +130,8 @@ int get_asr_patch(void *asr, size_t len) {
 int main(int argc, char* argv[]) { 
 
 	if (argc < 3) {
-		printf("asr_patcher - easily patch ASR on 64-bit devices. By Exploit3d.\n");
-		printf("Usage: asr asr_patched\n");
+		printf("Incorrect usage!\n");
+		printf("Usage: %s [ASR] [Patched ASR]\n", argv[0]);
 		return -1;
 	}