ó ³Ebc@sÔddlZddlZddlmZddlmZddlmZddlmZddlmZddl m Z d e fd „ƒYZ d e fd „ƒYZ d e fd„ƒYZde fd„ƒYZdS(iÿÿÿÿNi(tconstant_time_compare(t_base64_alphabet(t base64_decode(t base64_encode(t want_bytes(t BadSignaturetSigningAlgorithmcBs eZdZd„Zd„ZRS(sgSubclasses must implement :meth:`get_signature` to provide signature generation functionality. cCs tƒ‚dS(s2Returns the signature for the given key and value.N(tNotImplementedError(tselftkeytvalue((sk/var/www/html/facial-emotion-detection-webapp-main/flask/lib/python2.7/site-packages/itsdangerous/signer.pyt get_signaturescCst||j||ƒƒS(sMVerifies the given signature matches the expected signature. (RR (RR R tsig((sk/var/www/html/facial-emotion-detection-webapp-main/flask/lib/python2.7/site-packages/itsdangerous/signer.pytverify_signatures(t__name__t __module__t__doc__R R (((sk/var/www/html/facial-emotion-detection-webapp-main/flask/lib/python2.7/site-packages/itsdangerous/signer.pyR s t NoneAlgorithmcBseZdZd„ZRS(s`Provides an algorithm that does not perform any signing and returns an empty signature. cCsdS(Nt((RR R ((sk/var/www/html/facial-emotion-detection-webapp-main/flask/lib/python2.7/site-packages/itsdangerous/signer.pyR !s(RRRR (((sk/var/www/html/facial-emotion-detection-webapp-main/flask/lib/python2.7/site-packages/itsdangerous/signer.pyRst HMACAlgorithmcBs2eZdZeejƒZdd„Zd„Z RS(s*Provides signature generation using HMACs.cCs%|dkr|j}n||_dS(N(tNonetdefault_digest_methodt digest_method(RR((sk/var/www/html/facial-emotion-detection-webapp-main/flask/lib/python2.7/site-packages/itsdangerous/signer.pyt__init__-s  cCs(tj|d|d|jƒ}|jƒS(Ntmsgt digestmod(thmactnewRtdigest(RR R tmac((sk/var/www/html/facial-emotion-detection-webapp-main/flask/lib/python2.7/site-packages/itsdangerous/signer.pyR 2sN( RRRt staticmethodthashlibtsha1RRRR (((sk/var/www/html/facial-emotion-detection-webapp-main/flask/lib/python2.7/site-packages/itsdangerous/signer.pyR%s tSignercBsqeZdZeejƒZdZd dd d d d„Z d„Z d„Z d„Z d„Z d„Zd „ZRS( sèThis class can sign and unsign bytes, validating the signature provided. Salt can be used to namespace the hash, so that a signed string is only valid for a given namespace. Leaving this at the default value or re-using a salt value across different parts of your application where the same signed value in one part can mean something different in another part is a security risk. See :ref:`the-salt` for an example of what the salt is doing and how you can utilize it. .. versionadded:: 0.14 ``key_derivation`` and ``digest_method`` were added as arguments to the class constructor. .. versionadded:: 0.18 ``algorithm`` was added as an argument to the class constructor. s django-concatt.cCsÄt|ƒ|_t|ƒ|_|jtkr<tdƒ‚n|dkrNdn||_|dkro|j}n||_|dkr|j }n||_ |dkr·t |j ƒ}n||_ dS(Ns‹The given separator cannot be used because it may be contained in the signature itself. Alphanumeric characters and `-_=` must not be used.sitsdangerous.Signer( Rt secret_keytsepRt ValueErrorRtsalttdefault_key_derivationtkey_derivationRRRt algorithm(RR#R&R$R(RR)((sk/var/www/html/facial-emotion-detection-webapp-main/flask/lib/python2.7/site-packages/itsdangerous/signer.pyR[s         cCsÌt|jƒ}|jdkr8|j||jƒjƒS|jdkre|j|d|jƒjƒS|jdkr¦tj|jd|jƒ}|j|ƒ|jƒS|jdkr¼|jSt dƒ‚dS( s+This method is called to derive the key. The default key derivation choices can be overridden here. Key derivation is not intended to be used as a security method to make a complex key out of a short password. Instead you should use large random secret keys. tconcats django-concattsignerRRtnonesUnknown key derivation methodN( RR&R(RR#RRRtupdatet TypeError(RR&R((sk/var/www/html/facial-emotion-detection-webapp-main/flask/lib/python2.7/site-packages/itsdangerous/signer.pyt derive_keyws  cCs7t|ƒ}|jƒ}|jj||ƒ}t|ƒS(s*Returns the signature for the given value.(RR/R)R R(RR R R ((sk/var/www/html/facial-emotion-detection-webapp-main/flask/lib/python2.7/site-packages/itsdangerous/signer.pyR Œs  cCs$t|ƒt|jƒ|j|ƒS(sSigns the given string.(RR$R (RR ((sk/var/www/html/facial-emotion-detection-webapp-main/flask/lib/python2.7/site-packages/itsdangerous/signer.pytsign“scCsG|jƒ}yt|ƒ}Wntk r0tSX|jj|||ƒS(s+Verifies the signature for the given value.(R/Rt ExceptiontFalseR)R (RR R R ((sk/var/www/html/facial-emotion-detection-webapp-main/flask/lib/python2.7/site-packages/itsdangerous/signer.pyR —s   cCs…t|ƒ}t|jƒ}||kr=td|jƒ‚n|j|dƒ\}}|j||ƒrk|Std|d|ƒ‚dS(sUnsigns the given string.sNo %r found in valueisSignature %r does not matchtpayloadN(RR$RtrsplitR (Rt signed_valueR$R R ((sk/var/www/html/facial-emotion-detection-webapp-main/flask/lib/python2.7/site-packages/itsdangerous/signer.pytunsign s  cCs.y|j|ƒtSWntk r)tSXdS(snOnly validates the given signed value. Returns ``True`` if the signature exists and is valid. N(R6tTrueRR2(RR5((sk/var/www/html/facial-emotion-detection-webapp-main/flask/lib/python2.7/site-packages/itsdangerous/signer.pytvalidate«s   N(RRRRRR RR'RRR/R R0R R6R8(((sk/var/www/html/facial-emotion-detection-webapp-main/flask/lib/python2.7/site-packages/itsdangerous/signer.pyR!7s     (RRt_compatRtencodingRRRRtexcRtobjectRRRR!(((sk/var/www/html/facial-emotion-detection-webapp-main/flask/lib/python2.7/site-packages/itsdangerous/signer.pyts