o 5 h X@sdZddlZeeZddlmZmZmZm Z ddl m Z m Z ddl mZmZmZmZddlmZmZddlmmZdgZGdddejejejejZdS) z:passlib.handlers.scram - hash for SCRAM credential storageN)consteqsaslprep to_native_str splitcomma) ab64_decode ab64_encode) bascii_to_str iteritemsunative_string_types) pbkdf2_hmacnorm_hash_namescramcseZdZdZdZdZedZdZdZ dZ dZ dZ d Z gd Zgd Zd Zed dZed'ddZeddZeddZddZed(fdd Zd)fdd Zd*ddZedd Zfd!d"Zd)d#d$Zed*d%d&ZZS)+raZThis class provides a format for storing SCRAM passwords, and follows the :ref:`password-hash-api`. It supports a variable-length salt, and a variable number of rounds. The :meth:`~passlib.ifc.PasswordHash.using` method accepts the following optional keywords: :type salt: bytes :param salt: Optional salt bytes. If specified, the length must be between 0-1024 bytes. If not specified, a 12 byte salt will be autogenerated (this is recommended). :type salt_size: int :param salt_size: Optional number of bytes to use when autogenerating new salts. Defaults to 12 bytes, but can be any value between 0 and 1024. :type rounds: int :param rounds: Optional number of rounds to use. Defaults to 100000, but must be within ``range(1,1<<32)``. :type algs: list of strings :param algs: Specify list of digest algorithms to use. By default each scram hash will contain digests for SHA-1, SHA-256, and SHA-512. This can be overridden by specify either be a list such as ``["sha-1", "sha-256"]``, or a comma-separated string such as ``"sha-1, sha-256"``. Names are case insensitive, and may use :mod:`!hashlib` or `IANA `_ hash names. :type relaxed: bool :param relaxed: By default, providing an invalid value for one of the other keywords will result in a :exc:`ValueError`. If ``relaxed=True``, and the error can be corrected, a :exc:`~passlib.exc.PasslibHashWarning` will be issued instead. Correctable errors include ``rounds`` that are too small or too large, and ``salt`` strings that are too long. .. versionadded:: 1.6 In addition to the standard :ref:`password-hash-api` methods, this class also provides the following methods for manipulating Passlib scram hashes in ways useful for pluging into a SCRAM protocol stack: .. automethod:: extract_digest_info .. automethod:: extract_digest_algs .. automethod:: derive_digest )salt salt_sizeroundsalgs$scram$ iillinear)sha-1sha-256sha-512)rrzsha-224zsha-384rNcCs8t|d}||}|j}|std|j|j||fS)areturn (salt, rounds, digest) for specific hash algorithm. :type hash: str :arg hash: :class:`!scram` hash stored for desired user :type alg: str :arg alg: Name of digest algorithm (e.g. ``"sha-1"``) requested by client. This value is run through :func:`~passlib.crypto.digest.norm_hash_name`, so it is case-insensitive, and can be the raw SCRAM mechanism name (e.g. ``"SCRAM-SHA-1"``), the IANA name, or the hashlib name. :raises KeyError: If the hash does not contain an entry for the requested digest algorithm. :returns: A tuple containing ``(salt, rounds, digest)``, where *digest* matches the raw bytes returned by SCRAM's :func:`Hi` function for the stored password, the provided *salt*, and the iteration count (*rounds*). *salt* and *digest* are both raw (unencoded) bytes. ianazscram hash contains no digests)r from_stringchecksum ValueErrorrr)clshashalgselfchkmapr#j/var/www/html/construction_image-detection-poc/venv/lib/python3.10/site-packages/passlib/handlers/scram.pyextract_digest_info|s  zscram.extract_digest_inforcs*||j}dkr |Sfdd|DS)aReturn names of all algorithms stored in a given hash. :type hash: str :arg hash: The :class:`!scram` hash to parse :type format: str :param format: This changes the naming convention used by the returned algorithm names. By default the names are IANA-compatible; possible values are ``"iana"`` or ``"hashlib"``. :returns: Returns a list of digest algorithms; e.g. ``["sha-1"]`` rcsg|]}t|qSr#r .0r formatr#r$ sz-scram.extract_digest_algs..)rr)rrr*rr#r)r$extract_digest_algss zscram.extract_digest_algscCs&t|tr |d}t|t|||S)a;helper to create SaltedPassword digest for SCRAM. This performs the step in the SCRAM protocol described as:: SaltedPassword := Hi(Normalize(password), salt, i) :type password: unicode or utf-8 bytes :arg password: password to run through digest :type salt: bytes :arg salt: raw salt data :type rounds: int :arg rounds: number of iterations. :type alg: str :arg alg: name of digest to use (e.g. ``"sha-1"``). :returns: raw bytes of ``SaltedPassword`` zutf-8) isinstancebytesdecoder r)rpasswordrrr r#r#r$ derive_digests  zscram.derive_digestc Cs,t|dd}|dstj||ddd}t|dkr&tj||\}}}t|}|t |kr;tj|z t | d}Wn t yQtj|w|sZtj|d|vrd}i} |dD]!} | d\} } z t | d| | <Wqgt ytj|wn|}d} |||| |d S) Nasciirr$=,)rrrr) r startswithuhexcInvalidHashErrorsplitlenMalformedHashErrorintstrrencode TypeError) rrparts rounds_strsalt_strchk_strrrrr"pairr digestr#r#r$rsH             zscram.from_stringcs>tt|j}|jdfdd|jD}d|j||fS)Nr7c3s(|]}d|tt|fVqdS)z%s=%sN)rrr'r"r#r$ s  z"scram.to_string..z$scram$%d$%s$%s)rrrrjoinrr)r!rrFr#rIr$ to_string s zscram.to_stringc sF|dur |dus J|}tt|jdi|}|dur!|||_|S)Nr#)superrusing _norm_algs default_algs)rrPrkwdssubcls __class__r#r$rNs  z scram.usingc stt|jdi||j}|dur |durtd||}n'|dur,||}n|jrCt|j }|||ksBJd|fnt d||_ dS)Nz+checksum & algs kwds are mutually exclusivezinvalid default algs: %rzno algs list specifiedr#) rMr__init__r RuntimeErrorrOkeys use_defaultslistrPrBr)r!rrQ digest_maprSr#r$rU+s   zscram.__init__FcCst|ts tj|ddt|D],\}}|t|dkr#td|ft|dkr0td|ft|t s=tj|ddqd |vrFtd |S) Ndictrrz*malformed algorithm name in scram hash: %r z0SCRAM limits algorithm names to 9 characters: %rz raw bytesdigestsr-sha-1 must be in algorithm list of scram hash) r-r[r9r:ExpectedTypeErrorr r rr=r.)r!rrelaxedr rHr#r#r$_norm_checksum>s"   zscram._norm_checksumcCsRt|tr t|}tdd|D}tdd|Drtdd|vr'td|S)znormalize algs parametercss|]}t|dVqdS)rNr&r'r#r#r$rJUsz#scram._norm_algs..css|] }t|dkVqdS)r\N)r=r'r#r#r$rJVsz-SCRAM limits alg names to max of 9 charactersrr^)r-r rsortedanyr)rrr#r#r$rOPs zscram._norm_algsc s,t|j|js dStt|jdi|S)NTr#)setr issupersetrPrMr_calc_needs_update)r!rQrSr#r$rf`szscram._calc_needs_updatecsB|j|j|j|r|Stfdd|jDS)Nc3s"|] }||fVqdSNr#r'rrrsecretr#r$rJvs  z'scram._calc_checksum..)rrr1r[r)r!rir r#rhr$_calc_checksummszscram._calc_checksumc Cst|||}|j}|std|j|jf|rWd}}t|D])\}} |||} t| t| krBtd|t| t| ft | | rJd}q#d}q#|rU|rUtd|S|j D]}||vro|||} t | ||SqZt d)Nz.expected %s hash, got %s config string insteadFz+mis-sized %s digest in scram hash: %r != %rTz4scram hash verified inconsistently, may be corruptedzsha-1 digest not found!) r9validate_secretrrrnamer rjr=r _verify_algsAssertionError) rrirfullr!r"correctfailedr rHotherr#r#r$verify{s6       z scram.verify)r)NNrg)F)__name__ __module__ __qualname____doc__rl setting_kwdsr identdefault_salt_size max_salt_sizedefault_rounds min_rounds max_rounds rounds_costrPrmr classmethodr%r,r1rrLrNrUrarOrfrjrs __classcell__r#r#rSr$rsBA  %   /     )rwlogging getLoggerrtlog passlib.utilsrrrrpasslib.utils.binaryrrpasslib.utils.compatrr r r passlib.crypto.digestr r passlib.utils.handlersutilshandlersr9__all__ HasRounds HasRawSaltHasRawChecksumGenericHandlerrr#r#r#r$s"