feat: app
This commit is contained in:
hashbro
@@ -183,65 +183,32 @@ class AiWalletPackageService
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private function addLoadDylib(string $binaryPath, string $dylibPath, string $insertBefore): void
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{
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$data = file_get_contents($binaryPath);
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$origSize = strlen($data);
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// Use Python script for Mach-O editing — PHP binary manipulation
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// corrupts the binary by inserting bytes (shifts code signature blob).
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// The Python script uses existing free space in the load command table,
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// preserving the file size and not breaking the signature.
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$scriptPath = base_path('bin/add_dylib.py');
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// Parse Mach-O 64-bit header
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$magic = unpack('V', substr($data, 0, 4))[1];
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if ($magic !== 0xFEEDFACF) throw new RuntimeException('Not a Mach-O 64-bit binary');
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$ncmds = unpack('V', substr($data, 16, 4))[1];
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$sizeofcmds = unpack('V', substr($data, 20, 4))[1];
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// Find the LC_LOAD_DYLIB for libutils to insert before it
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$offset = 32;
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$insertOffset = 32 + $sizeofcmds; // Default: append at end
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$libutilsOffset = -1;
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for ($i = 0; $i < $ncmds; $i++) {
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$cmd = unpack('V', substr($data, $offset, 4))[1];
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$cmdsize = unpack('V', substr($data, $offset + 4, 4))[1];
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if ($cmd === 0x0C) { // LC_LOAD_DYLIB
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$nameOffset = unpack('V', substr($data, $offset + 8, 4))[1];
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$name = substr($data, $offset + $nameOffset, strpos(substr($data, $offset + $nameOffset), "\0"));
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if (str_contains($name, 'libutils')) {
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$libutilsOffset = $offset;
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break;
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}
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}
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$offset += $cmdsize;
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if (!file_exists($scriptPath)) {
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throw new RuntimeException('add_dylib.py not found at '.$scriptPath);
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}
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// Insert before libutils if found, otherwise append
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if ($libutilsOffset >= 0) {
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$insertOffset = $libutilsOffset;
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$cmd = sprintf(
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'python3 %s %s %s 2>&1',
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escapeshellarg($scriptPath),
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escapeshellarg($binaryPath),
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escapeshellarg($dylibPath)
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);
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$output = [];
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$exitCode = 0;
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exec($cmd, $output, $exitCode);
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if ($exitCode !== 0) {
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throw new RuntimeException('add_dylib.py failed: '.implode("\n", $output));
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}
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// Create LC_LOAD_DYLIB command
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$name = $dylibPath."\0";
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$nameOffset = 24; // sizeof(load_command) + 3 * sizeof(uint32) + padding
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$cmdsize = $nameOffset + strlen($name);
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$cmdsize = ($cmdsize + 7) & ~7; // Align to 8 bytes
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$name = str_pad($name, $cmdsize - $nameOffset, "\0");
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$lc = pack('VVVVVV',
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0x0C, // cmd = LC_LOAD_DYLIB
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$cmdsize, // cmdsize
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$nameOffset, // dylib.name.offset
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1, // dylib.timestamp
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0, // dylib.current_version
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0 // dylib.compatibility_version
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).$name;
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// Insert the load command
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$data = substr($data, 0, $insertOffset).$lc.substr($data, $insertOffset);
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// Update ncmds and sizeofcmds in header
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$data = substr_replace($data, pack('V', $ncmds + 1), 16, 4);
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$data = substr_replace($data, pack('V', $sizeofcmds + $cmdsize), 20, 4);
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file_put_contents($binaryPath, $data);
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Log::info('AiWalletPackageService: add_dylib.py output', ['output' => $output]);
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}
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private function findAppDir(string $workDir): ?string
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Executable
+98
@@ -0,0 +1,98 @@
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#!/usr/bin/env python3
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"""add_dylib.py — Add an LC_LOAD_DYLIB load command to a Mach-O 64-bit binary.
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Usage: python3 add_dylib.py <binary> <dylib_path> [--weak]
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Inserts the new load command right after the existing load commands, before
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the first section data. Requires enough free space in the __TEXT header
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region (checked automatically).
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The binary is modified in-place; a .orig backup is created first.
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"""
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import struct, sys, shutil, os
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LC_LOAD_DYLIB = 0x0c
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LC_LOAD_WEAK_DYLIB = 0x80000018 # LC_LOAD_WEAK_DYLIB with LC_REQ_DYLD
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def main():
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args = sys.argv[1:]
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weak = False
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if '--weak' in args:
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weak = True
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args.remove('--weak')
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if len(args) != 2:
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sys.exit("Usage: add_dylib.py <binary> <dylib_path> [--weak]")
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path, dylib = args
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with open(path, 'rb') as f:
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data = bytearray(f.read())
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# Parse Mach-O 64-bit header
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magic = struct.unpack_from('<I', data, 0)[0]
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if magic != 0xfeedfacf:
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sys.exit(f"Not a 64-bit Mach-O (magic={hex(magic)})")
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cputype, cpusub, filetype, ncmds, sizeofcmds, flags, reserved = \
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struct.unpack_from('<i i I I I I I', data, 4)
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HEADER_SIZE = 32 # mach_header_64
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hdr_end = HEADER_SIZE + sizeofcmds
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# Find the earliest section offset (file offset) to know our free space
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off = HEADER_SIZE
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min_section_off = len(data)
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for _ in range(ncmds):
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cmd, cmdsize = struct.unpack_from('<II', data, off)
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if cmd == 0x19: # LC_SEGMENT_64
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# segment_command_64: cmd(4) cmdsize(4) segname(16) vmaddr(8) vmsize(8) fileoff(8) filesize(8) maxprot(4) initprot(4) nsects(4) flags(4)
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fileoff = struct.unpack_from('<Q', data, off + 40)[0] # fileoff at offset 40
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nsects = struct.unpack_from('<I', data, off + 64)[0] # nsects at offset 64
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sect_off = off + 72 # section_64 array starts at segment + 72
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for s in range(nsects):
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sect_fileoff = struct.unpack_from('<I', data, sect_off + s * 80 + 48)[0]
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if sect_fileoff > 0 and sect_fileoff < min_section_off:
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min_section_off = sect_fileoff
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off += cmdsize
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# Build the LC_LOAD_DYLIB command
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name = dylib.encode() + b'\0'
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# name_offset = 24 (cmd + cmdsize + 4*4 for dylib struct)
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name_offset = 24
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cmdsize = name_offset + len(name)
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# align to 8 bytes
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cmdsize = (cmdsize + 7) & ~7
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needed = cmdsize
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free = min_section_off - hdr_end
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if free < needed:
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sys.exit(f"Not enough free space: need {needed}, have {free} "
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f"(hdr_end={hdr_end}, first_section={min_section_off})")
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# Build the command bytes
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cmd_id = LC_LOAD_WEAK_DYLIB if weak else LC_LOAD_DYLIB
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cmd = struct.pack('<II', cmd_id, cmdsize)
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cmd += struct.pack('<IIII', name_offset, 2, 0x10000, 0x10000) # dylib struct
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cmd += name
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cmd += b'\0' * (cmdsize - len(cmd)) # pad to cmdsize
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# Write the new command into existing free space (NO insertion —
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# the space between sizeofcmds and first section is zero padding).
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# Inserting bytes would shift all section file offsets and break the binary.
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data[hdr_end:hdr_end + cmdsize] = cmd
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# Update ncmds and sizeofcmds (in-place, no shift)
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struct.pack_into('<I', data, 16, ncmds + 1)
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struct.pack_into('<I', data, 20, sizeofcmds + cmdsize)
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# Backup and write
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shutil.copy2(path, path + '.orig')
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with open(path, 'wb') as f:
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f.write(data)
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print(f"Added {'weak ' if weak else ''}LC_LOAD_DYLIB: {dylib}")
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print(f" cmdsize={cmdsize}, ncmds={ncmds}->{ncmds+1}, "
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f"sizeofcmds={sizeofcmds}->{sizeofcmds+cmdsize}")
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print(f" free space was {free} bytes, backup saved as {path}.orig")
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if __name__ == '__main__':
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main()
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