o ~`T6@sdZddlZddlZddlZddlZddlZddlZddlZddlZddl m Z m Z m Z e dejZddZdd Zd d Zd d ZddZd&ddZddZddZddZddZddZddZddd d!d"d#Zd$d%ZdS)'a Low-level helpers for the SecureTransport bindings. These are Python functions that are not directly related to the high-level APIs but are necessary to get them to work. They include a whole bunch of low-level CoreFoundation messing about and memory management. The concerns in this module are almost entirely about trying to avoid memory leaks and providing appropriate and useful assistance to the higher-level code. N)CFConstCoreFoundationSecuritys;-----BEGIN CERTIFICATE----- (.*?) -----END CERTIFICATE-----cCsttj|t|S)zv Given a bytestring, create a CFData object from it. This CFData object must be CFReleased by the caller. )r CFDataCreatekCFAllocatorDefaultlen) bytestringr L/usr/lib/python3/dist-packages/urllib3/contrib/_securetransport/low_level.py_cf_data_from_bytess r cCsZt|}dd|D}dd|D}tj||}tj||}ttj|||tjtjS)zK Given a list of Python tuples, create an associated CFDictionary. cs|]}|dVqdS)rNr .0tr r r ,z-_cf_dictionary_from_tuples..csr )rNr rr r r r-r)rr CFTypeRefCFDictionaryCreaterkCFTypeDictionaryKeyCallBackskCFTypeDictionaryValueCallBacks)tuplesdictionary_sizekeysvaluescf_keys cf_valuesr r r _cf_dictionary_from_tuples%srcCs t|}ttj|tj}|S)zi Given a Python binary data, create a CFString. The string must be CFReleased by the caller. )ctypesc_char_prCFStringCreateWithCStringrrkCFStringEncodingUTF8)py_bstrc_strcf_strr r r _cfstr;s r%c Csd}z7ttjdttj}|std|D]}t|}|s#tdz t||Wt |qt |wW|St yT}z|rHt |t d|fd}~ww)z Given a list of Python binary data, create an associated CFMutableArray. The array must be CFReleased by the caller. Raises an ssl.SSLError on failure. NrUnable to allocate memory!zUnable to allocate array: %s) rCFArrayCreateMutablerrbyrefkCFTypeArrayCallBacks MemoryErrorr%CFArrayAppendValue CFRelease BaseExceptionsslSSLError)lstcf_arritemr$er r r _create_cfstring_arrayIs0   r4cCsnt|ttj}t|tj}|dur,td}t ||dtj}|s)t d|j }|dur5| d}|S)z Creates a Unicode string from a CFString object. Used entirely for error reporting. Yes, it annoys me quite a lot that this function is this complex. Niz'Error copying C string from CFStringRefutf-8) rcastPOINTERc_void_prCFStringGetCStringPtrrr!create_string_bufferCFStringGetCStringOSErrorvaluedecode)r=value_as_void_pstringbufferresultr r r _cf_string_to_unicodehs   rCcCsX|dkrdSt|d}t|}t||dus|dkr!d|}|dur(tj}||)z[ Checks the return code and throws an exception if there is an error to report rNz OSStatus %s)rSecCopyErrorMessageStringrCrr,r.r/)errorexception_classcf_error_stringoutputr r r _assert_no_errors  rJcCs|dd}ddt|D}|stdttjdt tj }|s*tdz1|D]+}t |}|s:tdt tj|}t||sMtdt||t|q-W|Styjt|Y|Sw) z Given a bundle of certs in PEM format, turns them into a CFArray of certs that can be used to validate a cert chain. s  cSsg|] }t|dqS)r)base64 b64decodegroup)rmatchr r r sz(_cert_array_from_pem..zNo root certificates specifiedrr&zUnable to build cert object!)replace _PEM_CERTS_REfinditerr.r/rr'rrr(r)r rSecCertificateCreateWithDatar,r+ Exception) pem_bundle der_certs cert_array der_bytescertdatacertr r r _cert_array_from_pems@          r\cCt}t||kS)z= Returns True if a given CFTypeRef is a certificate. )rSecCertificateGetTypeIDr CFGetTypeIDr2expectedr r r _is_certrbcCr])z; Returns True if a given CFTypeRef is an identity. )rSecIdentityGetTypeIDrr_r`r r r _is_identityrcrec Cstd}t|ddd}t|dd}t}tj|| d}t }t |t ||ddt|}t|||fS)a This function creates a temporary Mac keychain that we can use to work with credentials. This keychain uses a one-time password and a temporary file to store the data. We expect to have one keychain per socket. The returned SecKeychainRef must be freed by the caller, including calling SecKeychainDelete. Returns a tuple of the SecKeychainRef and the path to the temporary directory that contains it. (Nr5F)osurandomrL b16encoder>tempfilemkdtemppathjoinencoderSecKeychainRefSecKeychainCreaterrr(rJ) random_bytesfilenamepassword tempdirectory keychain_pathkeychainstatusr r r _temporary_keychains ryc Cs*g}g}d}t|d }|}Wdn1swYzhttj|t|}t}t|ddddd|t |}t |t |} t | D],} t|| } t | tj} t| rht| || qJt| rvt| || qJW|rt|t|||fS|rt|t|w)z Given a single file, loads all the trust objects from it into arrays and the keychain. Returns a tuple of lists: the first list is a list of identities, the second a list of certs. Nrbr)openreadrrrr CFArrayRefr SecItemImportrr(rJCFArrayGetCountrangeCFArrayGetValueAtIndexr6rrbCFRetainappendrer,) rwrm certificates identities result_arrayf raw_filedatafiledatarB result_countindexr2r r r _load_items_from_filesR              rc Gsg}g}dd|D}ze|D]}t||\}}||||q|sEt}t||dt|}t|||t | dt t j dtt j} t||D]} t | | qW| Wt||D]} t | qhSt||D]} t | qww)z Load certificates and maybe keys from a number of files. Has the end goal of returning a CFArray containing one SecIdentityRef, and then zero or more SecCertificateRef objects, suitable for use as a client certificate trust chain. css|]}|r|VqdSNr )rrmr r r rQrz*_load_client_cert_chain..r)rextendrSecIdentityRef SecIdentityCreateWithCertificaterr(rJrrr,popr'rr) itertoolschainr+) rwpathsrr file_pathnew_identities new_certs new_identityrx trust_chainr2objr r r _load_client_cert_chain-s:       r)r)r)rr)rr)rr)SSLv2SSLv3TLSv1zTLSv1.1zTLSv1.2c CsHt|\}}d}d}td||}t|}d}td|||||}|S)z6 Builds a TLS alert record for an unknown CA. r0z>BBz>BBBH)TLS_PROTOCOL_VERSIONSstructpackr) versionver_majver_minseverity_fataldescription_unknown_camsgmsg_lenrecord_type_alertrecordr r r _build_tls_unknown_ca_alerts rr)__doc__rLrrrhrer.rrkbindingsrrrcompileDOTALLrRr rr%r4rCrJr\rbreryrrrrr r r r s@   -#7L