a Lcf @sdZddlZddlZddlZddlmZddlmZddlm Z Gddde Z ddd d d Z d Z e fd dZddZdddZe ejdrejZejZndddddZddddZdS)z3 Django's standard crypto functions and utilities. N)settings) force_bytes)func_supports_parameterc@seZdZdZdS)InvalidAlgorithmz&Algorithm is not supported by hashlib.N)__name__ __module__ __qualname____doc__r r P/home/httpd/docs/test/DocsMgr/lib/python3.9/site-packages/django/utils/crypto.pyr srsha1) algorithmc Cs|durtj}t|}t|}ztt|}Wn2ty^}ztd||WYd}~n d}~00|||}tj |t||dS)a* Return the HMAC of 'value', using a key generated from key_salt and a secret (which defaults to settings.SECRET_KEY). Default algorithm is SHA1, but any algorithm name supported by hashlib can be passed. A different key_salt should be passed in for every application of HMAC. Nz6%r is not an algorithm accepted by the hashlib module.)msg digestmod) rZ SECRET_KEYrgetattrhashlibAttributeErrorrdigesthmacnew)Zkey_saltvaluesecretr Zhasherekeyr r r salted_hmacsrZ>abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789csdfddt|DS)aG Return a securely generated random string. The bit length of the returned value can be calculated with the formula: log_2(len(allowed_chars)^length) For example, with default `allowed_chars` (26+26+10), this gives: * length: 12, bit length =~ 71 bits * length: 22, bit length =~ 131 bits c3s|]}tVqdSN)secretschoice).0i allowed_charsr r >z$get_random_string..)joinrange)lengthr"r r!r get_random_string3s r(cCstt|t|S)z:Return True if the two strings are equal, False otherwise.)rcompare_digestr)Zval1Zval2r r r constant_time_compareAsr*cCs<|durtj}|pd}t|}t|}t|j||||S)z)Return the hash of password using pbkdf2.N)rsha256r pbkdf2_hmacname)passwordsaltZ iterationsZdklenrr r r pbkdf2Fs r0usedforsecurityr$T)r1cCs t|Sr)rmd5)datar1r r r r2Ysr2cCs t|Sr)rr)Zhash_algorithmr1r r r new_hash\sr4)N)rN)r$)r rrrZ django.confrZdjango.utils.encodingrZdjango.utils.inspectr ValueErrorrrZRANDOM_STRING_CHARSr(r*r0r2rr4r r r r s"