import hashlib, uuid
import logging
import pickle


log = logging.getLogger('rhizi')

def hash_pw(pw_str, salt_str):
    salt = hashlib.sha512(salt_str).hexdigest()
    ret = hashlib.sha512(pw_str + salt).hexdigest()
    return ret

def validate_login(config, u, p):
    htpasswd_path = config.htpasswd_path

    salt = config.secret_key

    with open(htpasswd_path) as f:
        pw_db = pickle.load(f)

        existing_pw_hash = pw_db.get(u)
        if None == existing_pw_hash:
            raise Exception('Not authorized')

        if hash_pw(p, salt) != existing_pw_hash:
            raise Exception('Not authorized')