HMAC-SHA1

[HMAC-SHA1]$ cat test1.py

#!/usr/bin/env python

import base64

import hmac

import hashlib

import urllib

import time

domain = "localhost";

port = "";

user = "u1";

group = "g1";

timestamp = int(time.time())

query = "?user=" + user + "&group=" + group + "&timestamp=" + timestamp;

sharedKey = "qwerty";

hash = hmac.new(sharedKey, query, hashlib.sha1).digest()

b = base64.encodestring(hash)

b = b.rstrip()

print "base64 string: " + b

print "signature: " + urllib.quote_plus(b.encode('utf8'))

[HMAC-SHA1]$ ./test1.py

base64 string: nU7YmyYLQ/HZ+GYLxdpva276wVk=

signature: nU7YmyYLQ%2FHZ%2BGYLxdpva276wVk%3D