Example HMAC for Eve and SL Auth

hmac_example.py

import hashlib
import hmac
import math
import datetime
import base64


def to_h(secret, method, segment, t=None):
    """
    Example:

    In [1]: to_h("s", "GET", "/api/v1/files")
    Out[1]: u'cXgVkgiUxqS/02QnhZi2PHQHPwLR8A9tceqsO9nXNAo='
    """
    if t is None:
        d = datetime.datetime.now()
        n = math.pow(10, 2)
        t = math.floor(long(d.strftime("%s")) / n)
    x = "+".join([method, segment, str(int(t))])
    digest = hmac.new(secret, x,  digestmod=hashlib.sha256).digest()
    return base64.b64encode(digest).decode()