§ •Åh–ãó0—dZddlZddlZddlZdd„Zd„ZdS)zm Utility functions for implementing Proof Key for Code Exchange (PKCE) by OAuth Public Clients See RFC7636. éNé@có—tjtj|¦«¦« d¦«}t |¦«dkrt d¦«‚t |¦«dkrt d¦«‚|S)aŸ Generates a 'code_verifier' as described in section 4.1 of RFC 7636. This is a 'high-entropy cryptographic random string' that will be impractical for an attacker to guess. Args: n_bytes: integer between 31 and 96, inclusive. default: 64 number of bytes of entropy to include in verifier. Returns: Bytestring, representing urlsafe base64-encoded random data. ó=é+z)Verifier too short. n_bytes must be > 30.é€z(Verifier too long. n_bytes must be < 97.)Úbase64Úurlsafe_b64encodeÚosÚurandomÚrstripÚlenÚ ValueError)Ún_bytesÚverifiers új/home/visionen/pythonvenv/lib/python3.11/site-packages/oauth2client-4.1.3-py3.11.egg/oauth2client/_pkce.pyÚ code_verifierrss€õÔ'­¬ °7Ñ(;Ô(;Ñ<Ô<×CÒCÀDÑIÔI€Hõ ˆ8}„}rÒÐÝÐDÑEÔEÐEÝ ˆX‰Œ˜Ò Ð ÝÐCÑDÔDÐDàˆócóœ—tj|¦« ¦«}tj|¦« d¦«S)a“ Creates a 'code_challenge' as described in section 4.2 of RFC 7636 by taking the sha256 hash of the verifier and then urlsafe base64-encoding it. Args: verifier: bytestring, representing a code_verifier as generated by code_verifier(). Returns: Bytestring, representing a urlsafe base64-encoded sha256 hash digest, without '=' padding. r)ÚhashlibÚsha256Údigestrr r )rrs rÚcode_challenger4s>€õŒ^˜HÑ %Ô %× ,Ò ,Ñ .Ô .€FÝ Ô # FÑ +Ô +× 2Ò 2°4Ñ 8Ô 8Ð8r)r)Ú__doc__rrr rr©rrúrsYðððð€ € € Ø€€€Ø € € € ððððð29ð9ð9ð9ð9r