X-Git-Url: https://jxself.org/git/?a=blobdiff_plain;f=kconfig_hardened_check%2F__init__.py;h=c4214a1410d4ee659259203c92276dab855418c4;hb=a47bed83770d59987ae270d059a59e4a8fe81117;hp=047befffd4ea1208a60bae9db92df78464b79215;hpb=100a39e2b01dadd2d27ed805cbe2b4ead7fc8b05;p=kconfig-hardened-check.git diff --git a/kconfig_hardened_check/__init__.py b/kconfig_hardened_check/__init__.py old mode 100755 new mode 100644 index 047beff..c4214a1 --- a/kconfig_hardened_check/__init__.py +++ b/kconfig_hardened_check/__init__.py @@ -61,6 +61,9 @@ import re import json from .__about__ import __version__ +# pylint: disable=line-too-long,bad-whitespace,too-many-branches +# pylint: disable=too-many-statements,global-statement + # debug_mode enables: # - reporting about unknown kernel options in the config, # - verbose printing of ComplexOptChecks (OR, AND). @@ -69,7 +72,7 @@ debug_mode = False # json_mode is for printing results in JSON format json_mode = False -supported_archs = [ 'X86_64', 'X86_32', 'ARM64', 'ARM' ] +supported_archs = ['X86_64', 'X86_32', 'ARM64', 'ARM'] kernel_version = None @@ -96,8 +99,7 @@ class OptCheck: if self.result.startswith('OK'): return True, self.result - else: - return False, self.result + return False, self.result def table_print(self, with_results): print('CONFIG_{:<38}|{:^13}|{:^10}|{:^20}'.format(self.name, self.expected, self.decision, self.reason), end='') @@ -120,9 +122,8 @@ class VerCheck: if kernel_version[1] >= self.ver_expected[1]: self.result = 'OK: version >= ' + str(self.ver_expected[0]) + '.' + str(self.ver_expected[1]) return True, self.result - else: - self.result = 'FAIL: version < ' + str(self.ver_expected[0]) + '.' + str(self.ver_expected[1]) - return False, self.result + self.result = 'FAIL: version < ' + str(self.ver_expected[0]) + '.' + str(self.ver_expected[1]) + return False, self.result def table_print(self, with_results): ver_req = 'kernel version >= ' + str(self.ver_expected[0]) + '.' + str(self.ver_expected[1]) @@ -141,9 +142,8 @@ class PresenceCheck: if self.state is None: self.result = 'FAIL: not present' return False, self.result - else: - self.result = 'OK: is present' - return True, self.result + self.result = 'OK: is present' + return True, self.result def table_print(self, with_results): print('CONFIG_{:<84}'.format(self.name + ' is present'), end='') @@ -202,7 +202,7 @@ class OR(ComplexOptCheck): sys.exit('[!] ERROR: invalid OR check') for i, opt in enumerate(self.opts): - ret, msg = opt.check() + ret, _ = opt.check() if ret: if i == 0 or not hasattr(opt, 'expected'): self.result = opt.result @@ -220,11 +220,11 @@ class AND(ComplexOptCheck): def check(self): for i, opt in reversed(list(enumerate(self.opts))): - ret, msg = opt.check() + ret, _ = opt.check() if i == 0: self.result = opt.result return ret, self.result - elif not ret: + if not ret: if hasattr(opt, 'expected'): self.result = 'FAIL: CONFIG_{} is needed'.format(opt.name) else: @@ -242,7 +242,7 @@ def detect_arch(fname): print('[+] Trying to detect architecture in "{}"...'.format(fname)) for line in f.readlines(): if arch_pattern.match(line): - option, value = line[7:].split('=', 1) + option, _ = line[7:].split('=', 1) if option in supported_archs: if not arch: arch = option @@ -250,8 +250,7 @@ def detect_arch(fname): return None, 'more than one supported architecture is detected' if not arch: return None, 'failed to detect architecture' - else: - return arch, 'OK' + return arch, 'OK' def detect_version(fname): @@ -270,8 +269,7 @@ def detect_version(fname): if len(ver_numbers) < 3 or not ver_numbers[0].isdigit() or not ver_numbers[1].isdigit(): msg = 'failed to parse the version "' + ver_str + '"' return None, msg - else: - return (int(ver_numbers[0]), int(ver_numbers[1])), None + return (int(ver_numbers[0]), int(ver_numbers[1])), None return None, 'no kernel version detected' @@ -293,7 +291,7 @@ def construct_checklist(checklist, arch): VerCheck((5, 5)))) # REFCOUNT_FULL is enabled by default since v5.5 iommu_support_is_set = OptCheck('IOMMU_SUPPORT', 'y', 'defconfig', 'self_protection') # is needed for mitigating DMA attacks checklist.append(iommu_support_is_set) - if arch == 'X86_64' or arch == 'X86_32': + if arch in ('X86_64', 'X86_32'): checklist.append(OptCheck('MICROCODE', 'y', 'defconfig', 'self_protection')) # is needed for mitigating CPU bugs checklist.append(OptCheck('RETPOLINE', 'y', 'defconfig', 'self_protection')) checklist.append(OptCheck('X86_SMAP', 'y', 'defconfig', 'self_protection')) @@ -311,15 +309,15 @@ def construct_checklist(checklist, arch): checklist.append(OptCheck('UNMAP_KERNEL_AT_EL0', 'y', 'defconfig', 'self_protection')) checklist.append(OptCheck('HARDEN_EL2_VECTORS', 'y', 'defconfig', 'self_protection')) checklist.append(OptCheck('RODATA_FULL_DEFAULT_ENABLED', 'y', 'defconfig', 'self_protection')) - if arch == 'X86_64' or arch == 'ARM64': + if arch in ('X86_64', 'ARM64'): checklist.append(OptCheck('VMAP_STACK', 'y', 'defconfig', 'self_protection')) - if arch == 'X86_64' or arch == 'ARM64' or arch == 'X86_32': + if arch in ('X86_64', 'ARM64', 'X86_32'): checklist.append(OptCheck('RANDOMIZE_BASE', 'y', 'defconfig', 'self_protection')) checklist.append(OptCheck('THREAD_INFO_IN_TASK', 'y', 'defconfig', 'self_protection')) if arch == 'ARM': checklist.append(OptCheck('CPU_SW_DOMAIN_PAN', 'y', 'defconfig', 'self_protection')) checklist.append(OptCheck('STACKPROTECTOR_PER_TASK', 'y', 'defconfig', 'self_protection')) - if arch == 'ARM64' or arch == 'ARM': + if arch in ('ARM64', 'ARM'): checklist.append(OptCheck('HARDEN_BRANCH_PREDICTOR', 'y', 'defconfig', 'self_protection')) checklist.append(OptCheck('BUG_ON_DATA_CORRUPTION', 'y', 'kspp', 'self_protection')) @@ -353,14 +351,14 @@ def construct_checklist(checklist, arch): checklist.append(OptCheck('INIT_ON_ALLOC_DEFAULT_ON', 'y', 'kspp', 'self_protection')) checklist.append(OR(OptCheck('INIT_ON_FREE_DEFAULT_ON', 'y', 'kspp', 'self_protection'), \ OptCheck('PAGE_POISONING', 'y', 'kspp', 'self_protection'))) # before v5.3 - if arch == 'X86_64' or arch == 'ARM64' or arch == 'X86_32': + if arch in ('X86_64', 'ARM64', 'X86_32'): stackleak_is_set = OptCheck('GCC_PLUGIN_STACKLEAK', 'y', 'kspp', 'self_protection') checklist.append(stackleak_is_set) checklist.append(AND(OptCheck('STACKLEAK_METRICS', 'is not set', 'clipos', 'self_protection'), \ stackleak_is_set)) checklist.append(AND(OptCheck('STACKLEAK_RUNTIME_DISABLE', 'is not set', 'clipos', 'self_protection'), \ stackleak_is_set)) - if arch == 'X86_64' or arch == 'X86_32': + if arch in ('X86_64', 'X86_32'): checklist.append(OptCheck('DEFAULT_MMAP_MIN_ADDR', '65536', 'kspp', 'self_protection')) if arch == 'X86_32': checklist.append(OptCheck('PAGE_TABLE_ISOLATION', 'y', 'kspp', 'self_protection')) @@ -368,7 +366,7 @@ def construct_checklist(checklist, arch): checklist.append(OptCheck('X86_PAE', 'y', 'kspp', 'self_protection')) if arch == 'ARM64': checklist.append(OptCheck('ARM64_SW_TTBR0_PAN', 'y', 'kspp', 'self_protection')) - if arch == 'ARM64' or arch == 'ARM': + if arch in ('ARM64', 'ARM'): checklist.append(OptCheck('SYN_COOKIES', 'y', 'kspp', 'self_protection')) # another reason? checklist.append(OptCheck('DEFAULT_MMAP_MIN_ADDR', '32768', 'kspp', 'self_protection')) @@ -380,7 +378,7 @@ def construct_checklist(checklist, arch): randstruct_is_set)) checklist.append(OptCheck('RANDOM_TRUST_BOOTLOADER', 'is not set', 'clipos', 'self_protection')) checklist.append(OptCheck('RANDOM_TRUST_CPU', 'is not set', 'clipos', 'self_protection')) - if arch == 'X86_64' or arch == 'X86_32': + if arch in ('X86_64', 'X86_32'): checklist.append(AND(OptCheck('INTEL_IOMMU_SVM', 'y', 'clipos', 'self_protection'), \ iommu_support_is_set)) checklist.append(AND(OptCheck('INTEL_IOMMU_DEFAULT_ON', 'y', 'clipos', 'self_protection'), \ @@ -395,7 +393,7 @@ def construct_checklist(checklist, arch): checklist.append(AND(OptCheck('AMD_IOMMU_V2', 'y', 'my', 'self_protection'), \ iommu_support_is_set)) - if arch == 'X86_64' or arch == 'ARM64' or arch == 'X86_32': + if arch in ('X86_64', 'ARM64', 'X86_32'): checklist.append(OptCheck('SECURITY', 'y', 'defconfig', 'security_policy')) # and choose your favourite LSM if arch == 'ARM': checklist.append(OptCheck('SECURITY', 'y', 'kspp', 'security_policy')) # and choose your favourite LSM @@ -413,7 +411,7 @@ def construct_checklist(checklist, arch): checklist.append(OptCheck('SECCOMP', 'y', 'defconfig', 'cut_attack_surface')) checklist.append(OptCheck('SECCOMP_FILTER', 'y', 'defconfig', 'cut_attack_surface')) - if arch == 'X86_64' or arch == 'ARM64' or arch == 'X86_32': + if arch in ('X86_64', 'ARM64', 'X86_32'): checklist.append(OR(OptCheck('STRICT_DEVMEM', 'y', 'defconfig', 'cut_attack_surface'), \ devmem_not_set)) # refers to LOCKDOWN @@ -470,7 +468,7 @@ def construct_checklist(checklist, arch): checklist.append(OptCheck('BPF_SYSCALL', 'is not set', 'lockdown', 'cut_attack_surface')) # refers to LOCKDOWN checklist.append(OptCheck('MMIOTRACE_TEST', 'is not set', 'lockdown', 'cut_attack_surface')) # refers to LOCKDOWN - if arch == 'X86_64' or arch == 'X86_32': + if arch in ('X86_64', 'X86_32'): checklist.append(OptCheck('X86_INTEL_TSX_MODE_OFF', 'y', 'clipos', 'cut_attack_surface')) # tsx=off checklist.append(OptCheck('STAGING', 'is not set', 'clipos', 'cut_attack_surface')) checklist.append(OptCheck('KSM', 'is not set', 'clipos', 'cut_attack_surface')) # to prevent FLUSH+RELOAD attack @@ -498,11 +496,11 @@ def construct_checklist(checklist, arch): checklist.append(OptCheck('INTEGRITY', 'y', 'defconfig', 'userspace_hardening')) if arch == 'ARM64': checklist.append(OptCheck('ARM64_PTR_AUTH', 'y', 'defconfig', 'userspace_hardening')) - if arch == 'ARM' or arch == 'X86_32': + if arch in ('ARM', 'X86_32'): checklist.append(OptCheck('VMSPLIT_3G', 'y', 'defconfig', 'userspace_hardening')) - if arch == 'X86_64' or arch == 'ARM64': + if arch in ('X86_64', 'ARM64'): checklist.append(OptCheck('ARCH_MMAP_RND_BITS', '32', 'clipos', 'userspace_hardening')) - if arch == 'X86_32' or arch == 'ARM': + if arch in ('X86_32', 'ARM'): checklist.append(OptCheck('ARCH_MMAP_RND_BITS', '16', 'my', 'userspace_hardening')) # checklist.append(OptCheck('LKDTM', 'm', 'my', 'feature_test'))