You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
270 lines
8.7 KiB
270 lines
8.7 KiB
#!/usr/bin/env python3
|
|
# Copyright (c) 2014 Wladimir J. van der Laan
|
|
# Distributed under the MIT software license, see the accompanying
|
|
# file COPYING or http://www.opensource.org/licenses/mit-license.php.
|
|
'''
|
|
A script to check that the executables produced by gitian only contain
|
|
certain symbols and are only linked against allowed libraries.
|
|
|
|
Example usage:
|
|
|
|
find ../gitian-builder/build -type f -executable | xargs python3 contrib/devtools/symbol-check.py
|
|
'''
|
|
import subprocess
|
|
import sys
|
|
import os
|
|
from typing import List, Optional
|
|
|
|
import lief
|
|
import pixie
|
|
|
|
# Debian 8 (Jessie) EOL: 2020. https://wiki.debian.org/DebianReleases#Production_Releases
|
|
#
|
|
# - g++ version 4.9.2 (https://packages.debian.org/search?suite=jessie&arch=any&searchon=names&keywords=g%2B%2B)
|
|
# - libc version 2.19 (https://packages.debian.org/search?suite=jessie&arch=any&searchon=names&keywords=libc6)
|
|
#
|
|
# Ubuntu 16.04 (Xenial) EOL: 2024. https://wiki.ubuntu.com/Releases
|
|
#
|
|
# - g++ version 5.3.1 (https://packages.ubuntu.com/search?keywords=g%2B%2B&searchon=names&suite=xenial§ion=all)
|
|
# - libc version 2.23.0 (https://packages.ubuntu.com/search?keywords=libc6&searchon=names&suite=xenial§ion=all)
|
|
#
|
|
# CentOS 7 EOL: 2024. https://wiki.centos.org/FAQ/General
|
|
#
|
|
# - g++ version 4.8.5 (http://mirror.centos.org/centos/7/os/x86_64/Packages/)
|
|
# - libc version 2.17 (http://mirror.centos.org/centos/7/os/x86_64/Packages/)
|
|
#
|
|
# Taking the minimum of these as our target.
|
|
#
|
|
# According to GNU ABI document (https://gcc.gnu.org/onlinedocs/libstdc++/manual/abi.html) this corresponds to:
|
|
# GCC 4.8.5: GCC_4.8.0
|
|
# (glibc) GLIBC_2_17
|
|
#
|
|
MAX_VERSIONS = {
|
|
'GCC': (4,8,0),
|
|
'GLIBC': (2,17),
|
|
'LIBATOMIC': (1,0)
|
|
}
|
|
# See here for a description of _IO_stdin_used:
|
|
# https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=634261#109
|
|
|
|
# Ignore symbols that are exported as part of every executable
|
|
IGNORE_EXPORTS = {
|
|
'_edata', '_end', '__end__', '_init', '__bss_start', '__bss_start__', '_bss_end__', '__bss_end__', '_fini', '_IO_stdin_used', 'stdin', 'stdout', 'stderr',
|
|
'environ', '_environ', '__environ',
|
|
}
|
|
CPPFILT_CMD = os.getenv('CPPFILT', '/usr/bin/c++filt')
|
|
|
|
# Allowed NEEDED libraries
|
|
ELF_ALLOWED_LIBRARIES = {
|
|
# bitcoind and bitcoin-qt
|
|
'libgcc_s.so.1', # GCC base support
|
|
'libc.so.6', # C library
|
|
'libpthread.so.0', # threading
|
|
'libm.so.6', # math library
|
|
'librt.so.1', # real-time (clock)
|
|
'libatomic.so.1',
|
|
'ld-linux-x86-64.so.2', # 64-bit dynamic linker
|
|
'ld-linux.so.2', # 32-bit dynamic linker
|
|
'ld-linux-aarch64.so.1', # 64-bit ARM dynamic linker
|
|
'ld-linux-armhf.so.3', # 32-bit ARM dynamic linker
|
|
'ld64.so.1', # POWER64 ABIv1 dynamic linker
|
|
'ld64.so.2', # POWER64 ABIv2 dynamic linker
|
|
'ld-linux-riscv64-lp64d.so.1', # 64-bit RISC-V dynamic linker
|
|
# bitcoin-qt only
|
|
'libxcb.so.1', # part of X11
|
|
'libxkbcommon.so.0', # keyboard keymapping
|
|
'libxkbcommon-x11.so.0', # keyboard keymapping
|
|
'libfontconfig.so.1', # font support
|
|
'libfreetype.so.6', # font parsing
|
|
'libdl.so.2' # programming interface to dynamic linker
|
|
}
|
|
ARCH_MIN_GLIBC_VER = {
|
|
pixie.EM_386: (2,1),
|
|
pixie.EM_X86_64: (2,2,5),
|
|
pixie.EM_ARM: (2,4),
|
|
pixie.EM_AARCH64:(2,17),
|
|
pixie.EM_PPC64: (2,17),
|
|
pixie.EM_RISCV: (2,27)
|
|
}
|
|
|
|
MACHO_ALLOWED_LIBRARIES = {
|
|
# bitcoind and bitcoin-qt
|
|
'libc++.1.dylib', # C++ Standard Library
|
|
'libSystem.B.dylib', # libc, libm, libpthread, libinfo
|
|
# bitcoin-qt only
|
|
'AppKit', # user interface
|
|
'ApplicationServices', # common application tasks.
|
|
'Carbon', # deprecated c back-compat API
|
|
'CoreFoundation', # low level func, data types
|
|
'CoreGraphics', # 2D rendering
|
|
'CoreServices', # operating system services
|
|
'CoreText', # interface for laying out text and handling fonts.
|
|
'CoreVideo', # video processing
|
|
'Foundation', # base layer functionality for apps/frameworks
|
|
'ImageIO', # read and write image file formats.
|
|
'IOKit', # user-space access to hardware devices and drivers.
|
|
'IOSurface', # cross process image/drawing buffers
|
|
'libobjc.A.dylib', # Objective-C runtime library
|
|
'Metal', # 3D graphics
|
|
'Security', # access control and authentication
|
|
'QuartzCore', # animation
|
|
}
|
|
|
|
PE_ALLOWED_LIBRARIES = {
|
|
'ADVAPI32.dll', # security & registry
|
|
'IPHLPAPI.DLL', # IP helper API
|
|
'KERNEL32.dll', # win32 base APIs
|
|
'msvcrt.dll', # C standard library for MSVC
|
|
'SHELL32.dll', # shell API
|
|
'USER32.dll', # user interface
|
|
'WS2_32.dll', # sockets
|
|
# bitcoin-qt only
|
|
'dwmapi.dll', # desktop window manager
|
|
'GDI32.dll', # graphics device interface
|
|
'IMM32.dll', # input method editor
|
|
'NETAPI32.dll',
|
|
'ole32.dll', # component object model
|
|
'OLEAUT32.dll', # OLE Automation API
|
|
'SHLWAPI.dll', # light weight shell API
|
|
'USERENV.dll',
|
|
'UxTheme.dll',
|
|
'VERSION.dll', # version checking
|
|
'WINMM.dll', # WinMM audio API
|
|
'WTSAPI32.dll',
|
|
}
|
|
|
|
class CPPFilt(object):
|
|
'''
|
|
Demangle C++ symbol names.
|
|
|
|
Use a pipe to the 'c++filt' command.
|
|
'''
|
|
def __init__(self):
|
|
self.proc = subprocess.Popen(CPPFILT_CMD, stdin=subprocess.PIPE, stdout=subprocess.PIPE, universal_newlines=True)
|
|
|
|
def __call__(self, mangled):
|
|
self.proc.stdin.write(mangled + '\n')
|
|
self.proc.stdin.flush()
|
|
return self.proc.stdout.readline().rstrip()
|
|
|
|
def close(self):
|
|
self.proc.stdin.close()
|
|
self.proc.stdout.close()
|
|
self.proc.wait()
|
|
|
|
def check_version(max_versions, version, arch) -> bool:
|
|
if '_' in version:
|
|
(lib, _, ver) = version.rpartition('_')
|
|
else:
|
|
lib = version
|
|
ver = '0'
|
|
ver = tuple([int(x) for x in ver.split('.')])
|
|
if not lib in max_versions:
|
|
return False
|
|
return ver <= max_versions[lib] or lib == 'GLIBC' and ver <= ARCH_MIN_GLIBC_VER[arch]
|
|
|
|
def check_imported_symbols(filename) -> bool:
|
|
elf = pixie.load(filename)
|
|
cppfilt = CPPFilt()
|
|
ok: bool = True
|
|
|
|
for symbol in elf.dyn_symbols:
|
|
if not symbol.is_import:
|
|
continue
|
|
sym = symbol.name.decode()
|
|
version = symbol.version.decode() if symbol.version is not None else None
|
|
if version and not check_version(MAX_VERSIONS, version, elf.hdr.e_machine):
|
|
print('{}: symbol {} from unsupported version {}'.format(filename, cppfilt(sym), version))
|
|
ok = False
|
|
return ok
|
|
|
|
def check_exported_symbols(filename) -> bool:
|
|
elf = pixie.load(filename)
|
|
cppfilt = CPPFilt()
|
|
ok: bool = True
|
|
for symbol in elf.dyn_symbols:
|
|
if not symbol.is_export:
|
|
continue
|
|
sym = symbol.name.decode()
|
|
if elf.hdr.e_machine == pixie.EM_RISCV or sym in IGNORE_EXPORTS:
|
|
continue
|
|
print('{}: export of symbol {} not allowed'.format(filename, cppfilt(sym)))
|
|
ok = False
|
|
return ok
|
|
|
|
def check_ELF_libraries(filename) -> bool:
|
|
ok: bool = True
|
|
elf = pixie.load(filename)
|
|
for library_name in elf.query_dyn_tags(pixie.DT_NEEDED):
|
|
assert(isinstance(library_name, bytes))
|
|
if library_name.decode() not in ELF_ALLOWED_LIBRARIES:
|
|
print('{}: NEEDED library {} is not allowed'.format(filename, library_name.decode()))
|
|
ok = False
|
|
return ok
|
|
|
|
def check_MACHO_libraries(filename) -> bool:
|
|
ok: bool = True
|
|
binary = lief.parse(filename)
|
|
for dylib in binary.libraries:
|
|
split = dylib.name.split('/')
|
|
if split[-1] not in MACHO_ALLOWED_LIBRARIES:
|
|
print(f'{split[-1]} is not in ALLOWED_LIBRARIES!')
|
|
ok = False
|
|
return ok
|
|
|
|
def check_PE_libraries(filename) -> bool:
|
|
ok: bool = True
|
|
binary = lief.parse(filename)
|
|
for dylib in binary.libraries:
|
|
if dylib not in PE_ALLOWED_LIBRARIES:
|
|
print(f'{dylib} is not in ALLOWED_LIBRARIES!')
|
|
ok = False
|
|
return ok
|
|
|
|
CHECKS = {
|
|
'ELF': [
|
|
('IMPORTED_SYMBOLS', check_imported_symbols),
|
|
('EXPORTED_SYMBOLS', check_exported_symbols),
|
|
('LIBRARY_DEPENDENCIES', check_ELF_libraries)
|
|
],
|
|
'MACHO': [
|
|
('DYNAMIC_LIBRARIES', check_MACHO_libraries)
|
|
],
|
|
'PE' : [
|
|
('DYNAMIC_LIBRARIES', check_PE_libraries)
|
|
]
|
|
}
|
|
|
|
def identify_executable(executable) -> Optional[str]:
|
|
with open(filename, 'rb') as f:
|
|
magic = f.read(4)
|
|
if magic.startswith(b'MZ'):
|
|
return 'PE'
|
|
elif magic.startswith(b'\x7fELF'):
|
|
return 'ELF'
|
|
elif magic.startswith(b'\xcf\xfa'):
|
|
return 'MACHO'
|
|
return None
|
|
|
|
if __name__ == '__main__':
|
|
retval: int = 0
|
|
for filename in sys.argv[1:]:
|
|
try:
|
|
etype = identify_executable(filename)
|
|
if etype is None:
|
|
print(f'{filename}: unknown format')
|
|
retval = 1
|
|
continue
|
|
|
|
failed: List[str] = []
|
|
for (name, func) in CHECKS[etype]:
|
|
if not func(filename):
|
|
failed.append(name)
|
|
if failed:
|
|
print(f'{filename}: failed {" ".join(failed)}')
|
|
retval = 1
|
|
except IOError:
|
|
print(f'{filename}: cannot open')
|
|
retval = 1
|
|
sys.exit(retval)
|