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files >> //opt/imunify360/venv/lib/python3.11/site-packages/pip/_vendor/truststore/_windows.py
import contextlib import ssl import typing from ctypes import WinDLL # type: ignore from ctypes import WinError # type: ignore from ctypes import ( POINTER, Structure, c_char_p, c_ulong, c_void_p, c_wchar_p, cast, create_unicode_buffer, pointer, sizeof, ) from ctypes.wintypes import ( BOOL, DWORD, HANDLE, LONG, LPCSTR, LPCVOID, LPCWSTR, LPFILETIME, LPSTR, LPWSTR, ) from typing import TYPE_CHECKING, Any from ._ssl_constants import _set_ssl_context_verify_mode HCERTCHAINENGINE = HANDLE HCERTSTORE = HANDLE HCRYPTPROV_LEGACY = HANDLE class CERT_CONTEXT(Structure): _fields_ = ( ("dwCertEncodingType", DWORD), ("pbCertEncoded", c_void_p), ("cbCertEncoded", DWORD), ("pCertInfo", c_void_p), ("hCertStore", HCERTSTORE), ) PCERT_CONTEXT = POINTER(CERT_CONTEXT) PCCERT_CONTEXT = POINTER(PCERT_CONTEXT) class CERT_ENHKEY_USAGE(Structure): _fields_ = ( ("cUsageIdentifier", DWORD), ("rgpszUsageIdentifier", POINTER(LPSTR)), ) PCERT_ENHKEY_USAGE = POINTER(CERT_ENHKEY_USAGE) class CERT_USAGE_MATCH(Structure): _fields_ = ( ("dwType", DWORD), ("Usage", CERT_ENHKEY_USAGE), ) class CERT_CHAIN_PARA(Structure): _fields_ = ( ("cbSize", DWORD), ("RequestedUsage", CERT_USAGE_MATCH), ("RequestedIssuancePolicy", CERT_USAGE_MATCH), ("dwUrlRetrievalTimeout", DWORD), ("fCheckRevocationFreshnessTime", BOOL), ("dwRevocationFreshnessTime", DWORD), ("pftCacheResync", LPFILETIME), ("pStrongSignPara", c_void_p), ("dwStrongSignFlags", DWORD), ) if TYPE_CHECKING: PCERT_CHAIN_PARA = pointer[CERT_CHAIN_PARA] # type: ignore[misc] else: PCERT_CHAIN_PARA = POINTER(CERT_CHAIN_PARA) class CERT_TRUST_STATUS(Structure): _fields_ = ( ("dwErrorStatus", DWORD), ("dwInfoStatus", DWORD), ) class CERT_CHAIN_ELEMENT(Structure): _fields_ = ( ("cbSize", DWORD), ("pCertContext", PCERT_CONTEXT), ("TrustStatus", CERT_TRUST_STATUS), ("pRevocationInfo", c_void_p), ("pIssuanceUsage", PCERT_ENHKEY_USAGE), ("pApplicationUsage", PCERT_ENHKEY_USAGE), ("pwszExtendedErrorInfo", LPCWSTR), ) PCERT_CHAIN_ELEMENT = POINTER(CERT_CHAIN_ELEMENT) class CERT_SIMPLE_CHAIN(Structure): _fields_ = ( ("cbSize", DWORD), ("TrustStatus", CERT_TRUST_STATUS), ("cElement", DWORD), ("rgpElement", POINTER(PCERT_CHAIN_ELEMENT)), ("pTrustListInfo", c_void_p), ("fHasRevocationFreshnessTime", BOOL), ("dwRevocationFreshnessTime", DWORD), ) PCERT_SIMPLE_CHAIN = POINTER(CERT_SIMPLE_CHAIN) class CERT_CHAIN_CONTEXT(Structure): _fields_ = ( ("cbSize", DWORD), ("TrustStatus", CERT_TRUST_STATUS), ("cChain", DWORD), ("rgpChain", POINTER(PCERT_SIMPLE_CHAIN)), ("cLowerQualityChainContext", DWORD), ("rgpLowerQualityChainContext", c_void_p), ("fHasRevocationFreshnessTime", BOOL), ("dwRevocationFreshnessTime", DWORD), ) PCERT_CHAIN_CONTEXT = POINTER(CERT_CHAIN_CONTEXT) PCCERT_CHAIN_CONTEXT = POINTER(PCERT_CHAIN_CONTEXT) class SSL_EXTRA_CERT_CHAIN_POLICY_PARA(Structure): _fields_ = ( ("cbSize", DWORD), ("dwAuthType", DWORD), ("fdwChecks", DWORD), ("pwszServerName", LPCWSTR), ) class CERT_CHAIN_POLICY_PARA(Structure): _fields_ = ( ("cbSize", DWORD), ("dwFlags", DWORD), ("pvExtraPolicyPara", c_void_p), ) PCERT_CHAIN_POLICY_PARA = POINTER(CERT_CHAIN_POLICY_PARA) class CERT_CHAIN_POLICY_STATUS(Structure): _fields_ = ( ("cbSize", DWORD), ("dwError", DWORD), ("lChainIndex", LONG), ("lElementIndex", LONG), ("pvExtraPolicyStatus", c_void_p), ) PCERT_CHAIN_POLICY_STATUS = POINTER(CERT_CHAIN_POLICY_STATUS) class CERT_CHAIN_ENGINE_CONFIG(Structure): _fields_ = ( ("cbSize", DWORD), ("hRestrictedRoot", HCERTSTORE), ("hRestrictedTrust", HCERTSTORE), ("hRestrictedOther", HCERTSTORE), ("cAdditionalStore", DWORD), ("rghAdditionalStore", c_void_p), ("dwFlags", DWORD), ("dwUrlRetrievalTimeout", DWORD), ("MaximumCachedCertificates", DWORD), ("CycleDetectionModulus", DWORD), ("hExclusiveRoot", HCERTSTORE), ("hExclusiveTrustedPeople", HCERTSTORE), ("dwExclusiveFlags", DWORD), ) PCERT_CHAIN_ENGINE_CONFIG = POINTER(CERT_CHAIN_ENGINE_CONFIG) PHCERTCHAINENGINE = POINTER(HCERTCHAINENGINE) X509_ASN_ENCODING = 0x00000001 PKCS_7_ASN_ENCODING = 0x00010000 CERT_STORE_PROV_MEMORY = b"Memory" CERT_STORE_ADD_USE_EXISTING = 2 USAGE_MATCH_TYPE_OR = 1 OID_PKIX_KP_SERVER_AUTH = c_char_p(b"1.3.6.1.5.5.7.3.1") CERT_CHAIN_REVOCATION_CHECK_END_CERT = 0x10000000 CERT_CHAIN_REVOCATION_CHECK_CHAIN = 0x20000000 CERT_CHAIN_POLICY_IGNORE_ALL_NOT_TIME_VALID_FLAGS = 0x00000007 CERT_CHAIN_POLICY_IGNORE_INVALID_BASIC_CONSTRAINTS_FLAG = 0x00000008 CERT_CHAIN_POLICY_ALLOW_UNKNOWN_CA_FLAG = 0x00000010 CERT_CHAIN_POLICY_IGNORE_INVALID_NAME_FLAG = 0x00000040 CERT_CHAIN_POLICY_IGNORE_WRONG_USAGE_FLAG = 0x00000020 CERT_CHAIN_POLICY_IGNORE_INVALID_POLICY_FLAG = 0x00000080 CERT_CHAIN_POLICY_IGNORE_ALL_REV_UNKNOWN_FLAGS = 0x00000F00 CERT_CHAIN_POLICY_ALLOW_TESTROOT_FLAG = 0x00008000 CERT_CHAIN_POLICY_TRUST_TESTROOT_FLAG = 0x00004000 SECURITY_FLAG_IGNORE_CERT_CN_INVALID = 0x00001000 AUTHTYPE_SERVER = 2 CERT_CHAIN_POLICY_SSL = 4 FORMAT_MESSAGE_FROM_SYSTEM = 0x00001000 FORMAT_MESSAGE_IGNORE_INSERTS = 0x00000200 # Flags to set for SSLContext.verify_mode=CERT_NONE CERT_CHAIN_POLICY_VERIFY_MODE_NONE_FLAGS = ( CERT_CHAIN_POLICY_IGNORE_ALL_NOT_TIME_VALID_FLAGS | CERT_CHAIN_POLICY_IGNORE_INVALID_BASIC_CONSTRAINTS_FLAG | CERT_CHAIN_POLICY_ALLOW_UNKNOWN_CA_FLAG | CERT_CHAIN_POLICY_IGNORE_INVALID_NAME_FLAG | CERT_CHAIN_POLICY_IGNORE_WRONG_USAGE_FLAG | CERT_CHAIN_POLICY_IGNORE_INVALID_POLICY_FLAG | CERT_CHAIN_POLICY_IGNORE_ALL_REV_UNKNOWN_FLAGS | CERT_CHAIN_POLICY_ALLOW_TESTROOT_FLAG | CERT_CHAIN_POLICY_TRUST_TESTROOT_FLAG ) wincrypt = WinDLL("crypt32.dll") kernel32 = WinDLL("kernel32.dll") def _handle_win_error(result: bool, _: Any, args: Any) -> Any: if not result: # Note, actually raises OSError after calling GetLastError and FormatMessage raise WinError() return args CertCreateCertificateChainEngine = wincrypt.CertCreateCertificateChainEngine CertCreateCertificateChainEngine.argtypes = ( PCERT_CHAIN_ENGINE_CONFIG, PHCERTCHAINENGINE, ) CertCreateCertificateChainEngine.errcheck = _handle_win_error CertOpenStore = wincrypt.CertOpenStore CertOpenStore.argtypes = (LPCSTR, DWORD, HCRYPTPROV_LEGACY, DWORD, c_void_p) CertOpenStore.restype = HCERTSTORE CertOpenStore.errcheck = _handle_win_error CertAddEncodedCertificateToStore = wincrypt.CertAddEncodedCertificateToStore CertAddEncodedCertificateToStore.argtypes = ( HCERTSTORE, DWORD, c_char_p, DWORD, DWORD, PCCERT_CONTEXT, ) CertAddEncodedCertificateToStore.restype = BOOL CertCreateCertificateContext = wincrypt.CertCreateCertificateContext CertCreateCertificateContext.argtypes = (DWORD, c_char_p, DWORD) CertCreateCertificateContext.restype = PCERT_CONTEXT CertCreateCertificateContext.errcheck = _handle_win_error CertGetCertificateChain = wincrypt.CertGetCertificateChain CertGetCertificateChain.argtypes = ( HCERTCHAINENGINE, PCERT_CONTEXT, LPFILETIME, HCERTSTORE, PCERT_CHAIN_PARA, DWORD, c_void_p, PCCERT_CHAIN_CONTEXT, ) CertGetCertificateChain.restype = BOOL CertGetCertificateChain.errcheck = _handle_win_error CertVerifyCertificateChainPolicy = wincrypt.CertVerifyCertificateChainPolicy CertVerifyCertificateChainPolicy.argtypes = ( c_ulong, PCERT_CHAIN_CONTEXT, PCERT_CHAIN_POLICY_PARA, PCERT_CHAIN_POLICY_STATUS, ) CertVerifyCertificateChainPolicy.restype = BOOL CertCloseStore = wincrypt.CertCloseStore CertCloseStore.argtypes = (HCERTSTORE, DWORD) CertCloseStore.restype = BOOL CertCloseStore.errcheck = _handle_win_error CertFreeCertificateChain = wincrypt.CertFreeCertificateChain CertFreeCertificateChain.argtypes = (PCERT_CHAIN_CONTEXT,) CertFreeCertificateContext = wincrypt.CertFreeCertificateContext CertFreeCertificateContext.argtypes = (PCERT_CONTEXT,) CertFreeCertificateChainEngine = wincrypt.CertFreeCertificateChainEngine CertFreeCertificateChainEngine.argtypes = (HCERTCHAINENGINE,) FormatMessageW = kernel32.FormatMessageW FormatMessageW.argtypes = ( DWORD, LPCVOID, DWORD, DWORD, LPWSTR, DWORD, c_void_p, ) FormatMessageW.restype = DWORD def _verify_peercerts_impl( ssl_context: ssl.SSLContext, cert_chain: list[bytes], server_hostname: str | None = None, ) -> None: """Verify the cert_chain from the server using Windows APIs.""" # If the peer didn't send any certificates then # we can't do verification. Raise an error. if not cert_chain: raise ssl.SSLCertVerificationError("Peer sent no certificates to verify") pCertContext = None hIntermediateCertStore = CertOpenStore(CERT_STORE_PROV_MEMORY, 0, None, 0, None) try: # Add intermediate certs to an in-memory cert store for cert_bytes in cert_chain[1:]: CertAddEncodedCertificateToStore( hIntermediateCertStore, X509_ASN_ENCODING | PKCS_7_ASN_ENCODING, cert_bytes, len(cert_bytes), CERT_STORE_ADD_USE_EXISTING, None, ) # Cert context for leaf cert leaf_cert = cert_chain[0] pCertContext = CertCreateCertificateContext( X509_ASN_ENCODING | PKCS_7_ASN_ENCODING, leaf_cert, len(leaf_cert) ) # Chain params to match certs for serverAuth extended usage cert_enhkey_usage = CERT_ENHKEY_USAGE() cert_enhkey_usage.cUsageIdentifier = 1 cert_enhkey_usage.rgpszUsageIdentifier = (c_char_p * 1)(OID_PKIX_KP_SERVER_AUTH) cert_usage_match = CERT_USAGE_MATCH() cert_usage_match.Usage = cert_enhkey_usage chain_params = CERT_CHAIN_PARA() chain_params.RequestedUsage = cert_usage_match chain_params.cbSize = sizeof(chain_params) pChainPara = pointer(chain_params) if ssl_context.verify_flags & ssl.VERIFY_CRL_CHECK_CHAIN: chain_flags = CERT_CHAIN_REVOCATION_CHECK_CHAIN elif ssl_context.verify_flags & ssl.VERIFY_CRL_CHECK_LEAF: chain_flags = CERT_CHAIN_REVOCATION_CHECK_END_CERT else: chain_flags = 0 try: # First attempt to verify using the default Windows system trust roots # (default chain engine). _get_and_verify_cert_chain( ssl_context, None, hIntermediateCertStore, pCertContext, pChainPara, server_hostname, chain_flags=chain_flags, ) except ssl.SSLCertVerificationError as e: # If that fails but custom CA certs have been added # to the SSLContext using load_verify_locations, # try verifying using a custom chain engine # that trusts the custom CA certs. custom_ca_certs: list[bytes] | None = ssl_context.get_ca_certs( binary_form=True ) if custom_ca_certs: try: _verify_using_custom_ca_certs( ssl_context, custom_ca_certs, hIntermediateCertStore, pCertContext, pChainPara, server_hostname, chain_flags=chain_flags, ) # Raise the original error, not the new error. except ssl.SSLCertVerificationError: raise e from None else: raise finally: CertCloseStore(hIntermediateCertStore, 0) if pCertContext: CertFreeCertificateContext(pCertContext) def _get_and_verify_cert_chain( ssl_context: ssl.SSLContext, hChainEngine: HCERTCHAINENGINE | None, hIntermediateCertStore: HCERTSTORE, pPeerCertContext: c_void_p, pChainPara: PCERT_CHAIN_PARA, # type: ignore[valid-type] server_hostname: str | None, chain_flags: int, ) -> None: ppChainContext = None try: # Get cert chain ppChainContext = pointer(PCERT_CHAIN_CONTEXT()) CertGetCertificateChain( hChainEngine, # chain engine pPeerCertContext, # leaf cert context None, # current system time hIntermediateCertStore, # additional in-memory cert store pChainPara, # chain-building parameters chain_flags, None, # reserved ppChainContext, # the resulting chain context ) pChainContext = ppChainContext.contents # Verify cert chain ssl_extra_cert_chain_policy_para = SSL_EXTRA_CERT_CHAIN_POLICY_PARA() ssl_extra_cert_chain_policy_para.cbSize = sizeof( ssl_extra_cert_chain_policy_para ) ssl_extra_cert_chain_policy_para.dwAuthType = AUTHTYPE_SERVER ssl_extra_cert_chain_policy_para.fdwChecks = 0 if ssl_context.check_hostname is False: ssl_extra_cert_chain_policy_para.fdwChecks = ( SECURITY_FLAG_IGNORE_CERT_CN_INVALID ) if server_hostname: ssl_extra_cert_chain_policy_para.pwszServerName = c_wchar_p(server_hostname) chain_policy = CERT_CHAIN_POLICY_PARA() chain_policy.pvExtraPolicyPara = cast( pointer(ssl_extra_cert_chain_policy_para), c_void_p ) if ssl_context.verify_mode == ssl.CERT_NONE: chain_policy.dwFlags |= CERT_CHAIN_POLICY_VERIFY_MODE_NONE_FLAGS chain_policy.cbSize = sizeof(chain_policy) pPolicyPara = pointer(chain_policy) policy_status = CERT_CHAIN_POLICY_STATUS() policy_status.cbSize = sizeof(policy_status) pPolicyStatus = pointer(policy_status) CertVerifyCertificateChainPolicy( CERT_CHAIN_POLICY_SSL, pChainContext, pPolicyPara, pPolicyStatus, ) # Check status error_code = policy_status.dwError if error_code: # Try getting a human readable message for an error code. error_message_buf = create_unicode_buffer(1024) error_message_chars = FormatMessageW( FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS, None, error_code, 0, error_message_buf, sizeof(error_message_buf), None, ) # See if we received a message for the error, # otherwise we use a generic error with the # error code and hope that it's search-able. if error_message_chars <= 0: error_message = f"Certificate chain policy error {error_code:#x} [{policy_status.lElementIndex}]" else: error_message = error_message_buf.value.strip() err = ssl.SSLCertVerificationError(error_message) err.verify_message = error_message err.verify_code = error_code raise err from None finally: if ppChainContext: CertFreeCertificateChain(ppChainContext.contents) def _verify_using_custom_ca_certs( ssl_context: ssl.SSLContext, custom_ca_certs: list[bytes], hIntermediateCertStore: HCERTSTORE, pPeerCertContext: c_void_p, pChainPara: PCERT_CHAIN_PARA, # type: ignore[valid-type] server_hostname: str | None, chain_flags: int, ) -> None: hChainEngine = None hRootCertStore = CertOpenStore(CERT_STORE_PROV_MEMORY, 0, None, 0, None) try: # Add custom CA certs to an in-memory cert store for cert_bytes in custom_ca_certs: CertAddEncodedCertificateToStore( hRootCertStore, X509_ASN_ENCODING | PKCS_7_ASN_ENCODING, cert_bytes, len(cert_bytes), CERT_STORE_ADD_USE_EXISTING, None, ) # Create a custom cert chain engine which exclusively trusts # certs from our hRootCertStore cert_chain_engine_config = CERT_CHAIN_ENGINE_CONFIG() cert_chain_engine_config.cbSize = sizeof(cert_chain_engine_config) cert_chain_engine_config.hExclusiveRoot = hRootCertStore pConfig = pointer(cert_chain_engine_config) phChainEngine = pointer(HCERTCHAINENGINE()) CertCreateCertificateChainEngine( pConfig, phChainEngine, ) hChainEngine = phChainEngine.contents # Get and verify a cert chain using the custom chain engine _get_and_verify_cert_chain( ssl_context, hChainEngine, hIntermediateCertStore, pPeerCertContext, pChainPara, server_hostname, chain_flags, ) finally: if hChainEngine: CertFreeCertificateChainEngine(hChainEngine) CertCloseStore(hRootCertStore, 0) @contextlib.contextmanager def _configure_context(ctx: ssl.SSLContext) -> typing.Iterator[None]: check_hostname = ctx.check_hostname verify_mode = ctx.verify_mode ctx.check_hostname = False _set_ssl_context_verify_mode(ctx, ssl.CERT_NONE) try: yield finally: ctx.check_hostname = check_hostname _set_ssl_context_verify_mode(ctx, verify_mode)
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