金山云KS3 V4签名 get 文件 Python脚本 demo

2021/7/4 9:51:29

编程Tag： 请求 get Request python SHA256 headers sorted lower KS3

本文主要是介绍金山云KS3 V4签名 get 文件 Python脚本 demo，对大家解决编程问题具有一定的参考价值，需要的程序猿们随着小编来一起学习吧！

https://docs.ksyun.com/documents/6890

V4签名计算：

  1. 签名信息放在请求头中（纯脚本，非面向对象）
     
    #!/usr/bin/env python3
# -*- coding:utf-8 -*-
#  @Time: 2021/7/2 21:04
#  @Author:zhangmingda
#  @File: test_v4_signature_get.py
#  @Software: PyCharm
#  Description:

from urllib.request import quote
import hashlib
import hmac
import datetime
import requests

'''
CanonicalRequest = HTTPRequestMethod + '\n'
        + CanonicalURI + '\n'
        + CanonicalQueryString + '\n'
        + CanonicalHeaders + '\n'
        + SignedHeaders + '\n'
        + HexEncode(Sha256Hash(RequestPayload))
'''

now_utc = datetime.datetime.utcnow()
datetime_utc = now_utc.strftime('%Y%m%dT%H%M%SZ')
date_utc = now_utc.strftime('%Y%m%d')

hosts = {
    'BEIJING': "ks3-cn-beijing.ksyun.com"
}

region = 'BEIJING'
bucket = 'zhangmingda'
ks3key = 'life-bbs/测试.txt'
service = 'ks3'
method = 'GET'

host = hosts.get(region)


#  生成标准化请求头
def generate_canonical_headers(**headers):
    '''
    :param headers: 所有用来签名的请求头
    :return: 返回小写请求头排序后的key:value 字符串，每个key:value 之间\n换行
    '''
    sorted_headers = ''                                         # 准备标准请求头key+value字符串
    sorted_signed_headers = ''                                  # 准备签名的请求头key组合字符串
    header_keys = headers.keys()                                # 获取请求头所有key
    lower_headers = {}                                          # 准备存放小写请求头和值的字典
    for header in header_keys:                                  # 把大写请求头字典都转换为小写请求头字典
        lower_headers[header.lower()] = headers.get(header)
    sorted_lower_header_keys = sorted(lower_headers.keys())     # 把签名的请求头排序

    '''排序后的请求头和值进行组合字符串'''
    for lower_header in sorted_lower_header_keys:
        sorted_headers += lower_header + ':' + str(lower_headers[lower_header]).strip() + '\n'
        sorted_signed_headers += lower_header + ";"
    # print("============请求头排序==============")
    # print(sorted_headers)
    # print('------被签名的请求头----')
    # print(sorted_signed_headers)
    # print("==========请求头排序end============")
    sorted_lower_headers = {
        'sorted_headers': sorted_headers,               # 签名的请求头key 和 value
        'signed_headers': sorted_signed_headers[:-1]    # 被签名的请求头字符串组合，最后一个分号; 不要
    }
    return sorted_lower_headers

# 创建规范化请求查询字符串
def generate_canonical_querystring(**params):
    '''
    :param params: 查询字符串字典
    :return: url编码后的查询字符串key1=value1&key2=value2 ...
    '''
    sorted_params = ''
    sorted_param_keys = sorted(params.keys())
    for param in sorted_param_keys:
        sorted_params += quote(param) + '=' + quote(params.get(param), safe='') + '&'  # 查询字符串中的值任何字符串都进行URL编码
    return sorted_params[:-1]


# 十六进制请求体Sha256Hash值--->请求体用
def binary_data_sha256_hex(binary_data=''.encode()):
    '''
    :param args:
    :param forms:
    :return: 返回请求体内容的sha256 哈希值
    '''
    sha256 = hashlib.sha256()
    sha256.update(binary_data)
    return sha256.hexdigest().lower()


# 构建被签名字符串，把标准请求canonical_request 哈希取16进制用
def str_sha256_hex(string=''):
    '''
    :param string:
    :return: 字符串的sha256哈希值
    '''
    sha256 = hashlib.sha256()
    sha256.update(string.encode())
    return sha256.hexdigest()


# 第二步构建签名key用
def encode_string_to_hmac_256_digest(encode_salt, msg, digestmod=hashlib.sha256):
    '''
    :param encode_salt: 盐
    :param msg: 字符串信息
    :param digestmod: 摘要算法
    :return: HMAC-SHA256 加盐哈希后的字节
    '''
    digest_maker = hmac.new(encode_salt, msg.encode(), digestmod=digestmod)
    return digest_maker.digest()


'''========================= 1. 准备被签名字符串 StringToSign计算=============================='''
'''======== 1.1 规范化请求变量准备 =========='''
sign_method = method                                    # 1.1.1 HTTP方法
canonical_uri = '/' + bucket + '/' + ks3key             # 1.1.2 资源URI
encode_uri = quote(canonical_uri, safe=";/?:@&=+$,")    # 将URL编码成%字符串格式
query_params = {}
canonical_querystring = generate_canonical_querystring(**query_params)  # 1.1.3 查询字符串
payload_sha256_hex = binary_data_sha256_hex()          # 1.1.5 请求体sha256 十六进制HASH值
signature_headers = {
    # 'x-kss-content-sha256': 'UNSIGNED-PAYLOAD',       # 请求体不参与鉴权的时候，如此传参
    'x-kss-content-sha256': payload_sha256_hex,
    'Host': host,
    # 'X-kss-date': datetime_utc                        # 如果请求头含Date 字段，这里日期可以不参与签名计算，注释即可
}
sorted_lower_headers = generate_canonical_headers(**signature_headers)
canonical_headers = sorted_lower_headers.get('sorted_headers')  # 1.1.4 小写排序后的请求头key:value
signed_headers = sorted_lower_headers.get('signed_headers')     # 1.1.5 小写排序后的签名头

''' 1.1 规范化请求CanonicalRequest计算方法'''
canonical_request = method + '\n'\
                    + encode_uri + '\n' \
                    + canonical_querystring + '\n' \
                    + canonical_headers + '\n' \
                    + signed_headers + '\n' \
                    + payload_sha256_hex    # 请求体不参与签名 时 ： + 'UNSIGNED-PAYLOAD'
print("==========================规范化化请求=================================")
print(canonical_request)
print("==========================规范化请求done=================================")

# 1.2 StringToSign
algorithm = 'KSS4-HMAC-SHA256'
requestdatetime = datetime_utc
credentialscope = date_utc + "/" + region + "/" + service + "/kss4_request"
canonical_request_sha256_hex = str_sha256_hex(canonical_request)
string_tosign = algorithm + '\n'\
                + requestdatetime + '\n'\
                + credentialscope + '\n'\
                + canonical_request_sha256_hex
print('================被签名的字符串======================')
print(string_tosign)
print('================被签名的字符串done======================')
#  =========================第二步准备签名KEY=================================
'''
kSecret = your Secret Key 
kDate = HMAC("KSS4" + kSecret, Date)
kRegion = HMAC(kDate, Region)
kService = HMAC(kRegion, Service)
kSigning = HMAC(kService, "kss4_request")
'''


# 创建签名KEY的方法
def generate_signing_key(sk, date_utc, region, service, termchar='kss4_request'):
    k_secret = "KSS4" + sk
    k_date = encode_string_to_hmac_256_digest(k_secret.encode(), date_utc)
    k_region = encode_string_to_hmac_256_digest(k_date, region)
    k_service = encode_string_to_hmac_256_digest(k_region, service)
    k_signing = encode_string_to_hmac_256_digest(k_service, termchar)
    return k_signing


# 创建签名的方法
def generate_signature(signing_key, string_tosign):
    digest_maker = hmac.new(signing_key, string_tosign.encode(), digestmod=hashlib.sha256)
    hex_signature = digest_maker.hexdigest()
    # print('hex_signature:', digest_maker.hexdigest())
    return hex_signature

if __name__ == '__main__':
    ak = 'XXXXXXXXXXXX'
    sk = 'XXXXXXXXXXXXXXXX'
    signing_key = generate_signing_key(sk, date_utc, region, service)
    signature = generate_signature(signing_key, string_tosign)
    request_headers = {
        'Authorization': "KSS4-HMAC-SHA256 Credential="
                         + ak + '/'
                         + credentialscope + ", "
                         + "SignedHeaders="
                         + signed_headers + ', '
                         + 'Signature=' + signature,
        'Date': datetime_utc
    }
    request_headers.update(signature_headers)
    # 通过通过标准的 HTTP Authorization 头发送签名请求
    url1 = "http://" + host + '/' + bucket + '/' + ks3key
    req = requests.get(url1, headers=request_headers)
    print(req.status_code)
    print(req.text)
    print(req.content.decode('GB2312'))

     

     

  2. 签名信息放在URL 查询字符串中（纯脚本，非面向对象）
     
    #!/usr/bin/env python3
# -*- coding:utf-8 -*-
#  @Time: 2021/7/2 21:04
#  @Author:zhangmingda
#  @File: test_v4_signature_get.py
#  @Software: PyCharm
#  Description:

from urllib.request import quote
import hashlib
import hmac
import datetime
import requests

'''
CanonicalRequest = HTTPRequestMethod + '\n'
        + CanonicalURI + '\n'
        + CanonicalQueryString + '\n'
        + CanonicalHeaders + '\n'
        + SignedHeaders + '\n'
        + HexEncode(Sha256Hash(RequestPayload))
'''

now_utc = datetime.datetime.utcnow()
datetime_utc = now_utc.strftime('%Y%m%dT%H%M%SZ')
date_utc = now_utc.strftime('%Y%m%d')

regions = {
    'ks3-cn-beijing.ksyun.com': "BEIJING"
}

endpoint = 'ks3-cn-beijing.ksyun.com'
host = endpoint
region = regions.get(host)
bucket = 'zhangmingda'
ks3key = 'life-bbs/测试.txt'
service = 'ks3'
method = 'GET'
ak = 'AKLTdwZzHs8UTY6ZiLcqCmJL1w'

#  生成标准化请求头
def generate_canonical_headers(**headers):
    '''
    :param headers: 所有用来签名的请求头
    :return: 返回小写请求头排序后的key:value 字符串，每个key:value 之间\n换行
    '''
    sorted_headers = ''                                         # 准备标准请求头key+value字符串
    sorted_signed_headers = ''                                  # 准备签名的请求头key组合字符串
    header_keys = headers.keys()                                # 获取请求头所有key
    lower_headers = {}                                          # 准备存放小写请求头和值的字典
    for header in header_keys:                                  # 把大写请求头字典都转换为小写请求头字典
        lower_headers[header.lower()] = headers.get(header)
    sorted_lower_header_keys = sorted(lower_headers.keys())     # 把签名的请求头排序

    '''排序后的请求头和值进行组合字符串'''
    for lower_header in sorted_lower_header_keys:
        sorted_headers += lower_header + ':' + str(lower_headers[lower_header]).strip() + '\n'
        sorted_signed_headers += lower_header + ";"
    # print("============请求头排序==============")
    # print(sorted_headers)
    # print('------被签名的请求头----')
    # print(sorted_signed_headers)
    # print("==========请求头排序end============")
    sorted_lower_headers = {
        'sorted_headers': sorted_headers,               # 签名的请求头key 和 value
        'signed_headers': sorted_signed_headers[:-1]    # 被签名的请求头字符串组合，最后一个分号; 不要
    }
    return sorted_lower_headers


# 创建规范化请求查询字符串
def generate_canonical_querystring(**params):
    '''
    :param params: 查询字符串字典
    :return: url编码后的查询字符串key1=value1&key2=value2 ...
    '''
    sorted_params = ''
    sorted_param_keys = sorted(params.keys())
    for param in sorted_param_keys:
        sorted_params += quote(param) + '=' + quote(params.get(param), safe='') + '&'  # 查询字符串中的值任何字符串都进行URL编码
    return sorted_params[:-1]


# 十六进制请求体Sha256Hash值--->请求体用
def binary_data_sha256_hex(binary_data=''.encode()):
    '''
    :param args:
    :param forms:
    :return: 返回请求体内容的sha256 哈希值
    '''
    sha256 = hashlib.sha256()
    sha256.update(binary_data)
    return sha256.hexdigest().lower()


# 构建被签名字符串，把标准请求canonical_request 哈希取16进制用
def str_sha256_hex(string=''):
    '''
    :param string:
    :return: 字符串的sha256哈希值
    '''
    sha256 = hashlib.sha256()
    sha256.update(string.encode())
    return sha256.hexdigest()


# 第二步构建签名key用
def encode_string_to_hmac_256_digest(encode_salt, msg, digestmod=hashlib.sha256):
    '''
    :param encode_salt: 盐
    :param msg: 字符串信息
    :param digestmod: 摘要算法
    :return: HMAC-SHA256 加盐哈希后的字节
    '''
    digest_maker = hmac.new(encode_salt, msg.encode(), digestmod=digestmod)
    return digest_maker.digest()


'''========================= 1. 准备被签名字符串 StringToSign计算=============================='''
'''======== 1.1 规范化请求变量准备 =========='''
sign_method = method                                    # 1.1.1 HTTP方法
canonical_uri = '/' + bucket + '/' + ks3key             # 1.1.2 资源URI
encode_uri = quote(canonical_uri, safe="/")    # 1.1.2 将URI编码成%字符串格式 不包含? 后的url查询参数
payload_sha256_hex = binary_data_sha256_hex()          # 1.1.5 请求体sha256 十六进制HASH值
signature_headers = {
    'Host': host,
    'x-kss-content-sha256': payload_sha256_hex,
}
sorted_lower_headers = generate_canonical_headers(**signature_headers)
canonical_headers = sorted_lower_headers.get('sorted_headers')                  # 1.1.4 小写排序后的请求头key:value
signed_headers = sorted_lower_headers.get('signed_headers')                     # 1.1.5 小写排序后的签名头
credentialscope = date_utc + "/" + region + "/" + service + "/kss4_request"

query_params = {
    'X-Kss-Algorithm': "KSS4-HMAC-SHA256",
    'X-Kss-Credential': ak + '/' + credentialscope,
    'X-Kss-Date': datetime_utc,
    'X-Kss-Expires': '3600',
    'X-Kss-SignedHeaders': signed_headers,
}
canonical_querystring = generate_canonical_querystring(**query_params)        # 1.1.3 查询字符串

''' 1.1 规范化请求CanonicalRequest计算方法'''
canonical_request = method + '\n'\
                    + encode_uri + '\n' \
                    + canonical_querystring + '\n' \
                    + canonical_headers + '\n' \
                    + signed_headers + '\n' \
                    + payload_sha256_hex    # 请求体不参与签名 时 ： + 'UNSIGNED-PAYLOAD'
print("==========================规范化化请求=================================")
print(canonical_request)
print("==========================规范化请求done=================================")
canonical_request_sha256_hex = str_sha256_hex(canonical_request)  # 规范化请求的256哈希值

# 1.2 StringToSign
algorithm = 'KSS4-HMAC-SHA256'
requestdatetime = datetime_utc
string_tosign = algorithm + '\n'\
                + requestdatetime + '\n'\
                + credentialscope + '\n'\
                + canonical_request_sha256_hex
print('================被签名的字符串======================')
print(string_tosign)
print('================被签名的字符串done======================')
#  =========================第二步准备签名KEY=================================
'''
kSecret = your Secret Key 
kDate = HMAC("KSS4" + kSecret, Date)
kRegion = HMAC(kDate, Region)
kService = HMAC(kRegion, Service)
kSigning = HMAC(kService, "kss4_request")
'''


# 创建签名KEY的方法
def generate_signing_key(sk, date_utc, region, service, termchar='kss4_request'):
    k_secret = "KSS4" + sk
    k_date = encode_string_to_hmac_256_digest(k_secret.encode(), date_utc)
    k_region = encode_string_to_hmac_256_digest(k_date, region)
    k_service = encode_string_to_hmac_256_digest(k_region, service)
    k_signing = encode_string_to_hmac_256_digest(k_service, termchar)
    return k_signing


# 创建签名的方法
def generate_signature(signing_key, string_tosign):
    digest_maker = hmac.new(signing_key, string_tosign.encode(), digestmod=hashlib.sha256)
    hex_signature = digest_maker.hexdigest()
    # print('hex_signature:', digest_maker.hexdigest())
    return hex_signature

if __name__ == '__main__':

    sk = 'OAXDdJoILGG2tD3tXDD8EVIiP7sOueqp2ylgBrg+nF/au0btfHcGF/Br80j4JFAiMQ=='
    signing_key = generate_signing_key(sk, date_utc, region, service)
    signature = generate_signature(signing_key, string_tosign)
    request_headers = signature_headers
    request_query_params = {
        'X-Kss-Signature': signature
    }
    request_query_params.update(query_params)
    print(request_query_params)

    # 通过 URL QueryString 发送签名
    # requests 用法1
    url1 = "http://" + host + '/' + bucket + '/' + ks3key + '?' + generate_canonical_querystring(**request_query_params)
    print(url1)
    response = requests.get(url1, headers=request_headers)
    print(response.status_code)
    print(response.content.decode('gb2312'))
    # requests 用法2
    url2 = "http://" + host + '/' + bucket + '/' + ks3key
    response2 = requests.get(url2, params=request_query_params, headers=request_headers)
    print(response2.status_code)
    print(response2.url)

    输出：

    D:\Python3_study\tornado1\Scripts\python.exe C:/Users/ZHANGMINGDA/Desktop/kingsoft/KS3/test_v4_signature_in_url_get.py
==========================规范化化请求=================================
GET
/zhangmingda/life-bbs/%E6%B5%8B%E8%AF%95.txt
X-Kss-Algorithm=KSS4-HMAC-SHA256&X-Kss-Credential=AKLTdwZzHs8UTY6ZiLcqCmJL1w%2F20210704%2FBEIJING%2Fks3%2Fkss4_request&X-Kss-Date=20210704T010302Z&X-Kss-Expires=3600&X-Kss-SignedHeaders=host%3Bx-kss-content-sha256
host:ks3-cn-beijing.ksyun.com
x-kss-content-sha256:e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855

host;x-kss-content-sha256
e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855
==========================规范化请求done=================================
================被签名的字符串======================
KSS4-HMAC-SHA256
20210704T010302Z
20210704/BEIJING/ks3/kss4_request
d4f17877ff6ced3b1df5fb7fbebef9933aa8d0698de653127a5d64ec92e523b1
================被签名的字符串done======================
{'X-Kss-Signature': 'a0a071ae8fb5f6a9018fa2583bf082bea08acad6fbdb395a0a3f6bd69601fd80', 'X-Kss-Algorithm': 'KSS4-HMAC-SHA256', 'X-Kss-Credential': 'AKLTdwZzHs8UTY6ZiLcqCmJL1w/20210704/BEIJING/ks3/kss4_request', 'X-Kss-Date': '20210704T010302Z', 'X-Kss-Expires': '3600', 'X-Kss-SignedHeaders': 'host;x-kss-content-sha256'}
http://ks3-cn-beijing.ksyun.com/zhangmingda/life-bbs/测试.txt?X-Kss-Algorithm=KSS4-HMAC-SHA256&X-Kss-Credential=AKLTdwZzHs8UTY6ZiLcqCmJL1w%2F20210704%2FBEIJING%2Fks3%2Fkss4_request&X-Kss-Date=20210704T010302Z&X-Kss-Expires=3600&X-Kss-Signature=a0a071ae8fb5f6a9018fa2583bf082bea08acad6fbdb395a0a3f6bd69601fd80&X-Kss-SignedHeaders=host%3Bx-kss-content-sha256
200
test
测试
200
http://ks3-cn-beijing.ksyun.com/zhangmingda/life-bbs/%E6%B5%8B%E8%AF%95.txt?X-Kss-Signature=a0a071ae8fb5f6a9018fa2583bf082bea08acad6fbdb395a0a3f6bd69601fd80&X-Kss-Algorithm=KSS4-HMAC-SHA256&X-Kss-Credential=AKLTdwZzHs8UTY6ZiLcqCmJL1w%2F20210704%2FBEIJING%2Fks3%2Fkss4_request&X-Kss-Date=20210704T010302Z&X-Kss-Expires=3600&X-Kss-SignedHeaders=host%3Bx-kss-content-sha256

Process finished with exit code 0

     

 



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