1. 通过 HTTP 请求 Header 发送的签名

算法

Signature = base64(hmac - sha1(VERB + "\n"
                               + CONTENT - MD5 + "\n"
                               + CONTENT - TYPE + "\n"
                               + DATE + "\n"
                               [+ CanonicalizedKssHeaders + "\n"]
                               + CanonicalizedResource, SecreteKey))

示例：

import hashlib
import hmac
import base64

verb = 'PUT'
md5 = 'xxxxx'
content_type = 'xxx'
date = 'xxxxx'
resource = '/xxx'

string_to_sgin = verb +'\n' + md5 + '\n' + content_type + '\n' + date_ + '\n'  + resource

sginature = base64.encodebytes(hmac.new(sk.encode(),string_to_sgin.encode(),hashlib.sha1).digest()).strip().decode()

2. 通过URL QueryString发送的签名

算法

Signature = base64(hmac - sha1(VERB + "\n"
                               + "" + "\n"
                               + "" + "\n"
                               + Expires + "\n"
                               + CanonicalizedResource, SecreteKey))
示例：

import hashlib
import hmac
import base64

string_to_sgin2 =  'GET' + '\n' + '\n' + '\n' + '1607782768' + '\n' + '/'

sginature = base64.encodebytes(hmac.new(sk.encode(),string_to_sgin2.encode(),hashlib.sha1).digest()).strip().decode()