B -[@sddlZddlmZddlmZddlmZddlmZddlmZddlmZdd lm Z dd l m Z dd l m Z dd l m Z dd lmZddlmZGdddeZGdddeZdS)N)datetime) text_type) base64_decode) base64_encode) bytes_to_int) int_to_bytes) want_bytes) BadSignature)BadTimeSignature)SignatureExpired) Serializer)Signerc@s<eZdZdZddZddZddZdd d Zdd d ZdS)TimestampSignerzWorks like the regular :class:`.Signer` but also records the time of the signing and can be used to expire signatures. The :meth:`unsign` method can raise :exc:`.SignatureExpired` if the unsigning failed because the signature is expired. cCs ttS)zTReturns the current timestamp. The function must return an integer. )inttime)selfr1lib/python3.7/site-packages/itsdangerous/timed.py get_timestampszTimestampSigner.get_timestampcCs t|S)zaUsed to convert the timestamp from :meth:`get_timestamp` into a datetime object. )rZutcfromtimestamp)rZtsrrrtimestamp_to_datetimesz%TimestampSigner.timestamp_to_datetimecCs@t|}tt|}t|j}|||}||||S)z:Signs the given string and also attaches time information.)r rrrsepZ get_signature)rvalue timestamprrrrsign$s   zTimestampSigner.signNFc Cs(yt||}d}Wn0tk rD}z|}|jp2d}Wdd}~XYnXt|j}||krl|r`|td|d||d\}}ytt |}Wnt k rd}YnX|dk rtt |||d|dkrtd|d|dk r| |} | |krt d| |f|||d|r$|||fS|S) a=Works like the regular :meth:`.Signer.unsign` but can also validate the time. See the base docstring of the class for the general behavior. If ``return_timestamp`` is ``True`` the timestamp of the signature will be returned as a naive :class:`datetime.datetime` object in UTC. Nztimestamp missing)payloadr)rZ date_signedzMalformed timestampzSignature age %s > %s seconds)runsignr rr rr rsplitrr Exceptionrrr r) rrmax_agereturn_timestampresultZ sig_errorerrZagerrrr,s>         zTimestampSigner.unsigncCs,y|j||ddStk r&dSXdS)zeOnly validates the given signed value. Returns ``True`` if the signature exists and is valid.)r TFN)rr )rZ signed_valuer rrrvalidatees zTimestampSigner.validate)NF)N) __name__ __module__ __qualname____doc__rrrrr$rrrrrs  9rc@s(eZdZdZeZdddZd ddZdS) TimedSerializerzOUses :class:`TimestampSigner` instead of the default :class:`.Signer`. NFc Cst|}d}x|||D]n}y.|j||dd\}}||} |rH| |fS| Stk r`Yqtk r} z| }Wdd} ~ XYqXqW|dS)aReverse of :meth:`dumps`, raises :exc:`.BadSignature` if the signature validation fails. If a ``max_age`` is provided it will ensure the signature is not older than that time in seconds. In case the signature is outdated, :exc:`.SignatureExpired` is raised. All arguments are forwarded to the signer's :meth:`~TimestampSigner.unsign` method. NT)r!)r Ziter_unsignersrZ load_payloadr r ) rsr r!saltZlast_exceptionsignerZbase64drrerrrrrloadsvs zTimedSerializer.loadscCsd|i}i}|||||S)Nr )Z_loads_unsafe_impl)rr*r r+Z load_kwargsZload_payload_kwargsrrr loads_unsafeszTimedSerializer.loads_unsafe)NFN)NN)r%r&r'r(rZdefault_signerr.r/rrrrr)os r))rrZ_compatrencodingrrrrr excr r r Z serializerr r,rrr)rrrrs            ^