开宗明义，米扑科技在使用腾讯云的API接口签名中，按照官方示例开发PHP、Python的接口，经常会提示签名错误
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{
"Response"
: {
"Error"
: {
"Code"
:
"InvalidParameter.SignatureFailure"
,
"Message"
:
"The provided credentials could not be validated. Please check your signature is correct."
},
"RequestId"
:
"1ee6ae98-a971-ad9f-4ecc-abcd69ea1234"
}
}
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本文原文，请参见米扑博客：
Python 和 PHP 对腾讯云签名 hmac_sha256 算法实现
经过多次尝试探究，发现原因有二：
1）腾讯云官方示例不严谨，没有urlencode() 或 urllib.quote() 编码导致提示签名错误
2）腾讯官方只提供了PHP示例，没有提供Python示例，两者签名函数有一些细节
直接给出干货，下面示例是 米扑科技 封装好的腾讯云签名函数，以飨读者。
腾讯云签名：https://cloud.tencent.com/document/api/377/4214
阿里云签名：https://help.aliyun.com/document_detail/35735.html
米扑的官网：https://mimvp.com
PHP 签名示例
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/**
* 签名并获取URL结果，json格式返回
*
* 1. 查询弹性IP列表, DescribeAddresses
* 2. 解绑弹性IP, DisassociateAddress
* 3. 释放弹性IP, ReleaseAddresses
* 4. 公网IP转弹性IP, TransformAddress
*
* @param string $req_action : DescribeAddresses, DisassociateAddress, ReleaseAddresses, TransformAddress
* @param string $params : 以 & 开头， 如 &xxx=yyy
*/
function
qcloud_eip_sign(
$req_action
=
'DescribeAddresses'
,
$req_region
=
'ap-beijing'
,
$req_extra_params
=
''
,
$retry_NUM
=3) {
global
$QCloud_SecretId
;
global
$QCloud_SecretKey
;
// $req_action='DescribeAddresses'
// $req_region = 'ap-beijing'; // ap-guangzhou
$req_method
=
'GET'
;
// GET POST
$req_api
=
'eip.api.qcloud.com/v2/index.php'
;
$req_version
=
'2017-03-12'
;
$req_timestamp
=
strtotime
(
date
(
'YmdHis'
));
// 1402992826
$req_nonce
= rand(1000, 1000000);
// 随机正整数
$req_secretid
=
$QCloud_SecretId
;
// 密钥ID，用作参数
$req_secretkey
=
$QCloud_SecretKey
;
// 密钥key，用作加密
$req_signature_method
=
'HmacSHA256'
;
// HmacSHA1(默认), HmacSHA256
$req_signature
=
''
;
// $req_uri = "https://eip.api.qcloud.com/v2/index.php?Action=DescribeAddresses
// &Version=2017-03-12
// &AddressIds.1=eip-hxlqja90
// &Region=ap-beijing
// &Timestamp=1402992826
// &Nonce=345122
// &Signature=pStJagaKsV2QdkJnBQWYBDByZ9YPBsOi
// &SecretId=AKIDpY8cxBD2GLGK9sT0LaqIczGLFxTsoDF6
// 请求方法 + 请求主机 +请求路径 + ? + 请求字符串
$req_params
= sprintf(
"Action=%s&Region=%s&Version=%s&Timestamp=%s&Nonce=%s&SecretId=%s&SignatureMethod=%s%s"
,
$req_action
,
$req_region
,
$req_version
,
$req_timestamp
,
$req_nonce
,
$req_secretid
,
$req_signature_method
,
$req_extra_params
);
$req_params_array
=
explode
(
"&"
,
$req_params
);
sort(
$req_params_array
);
// 以value排序，value值为 Action=DescribeAddresses 、 Region=ap-beijing
$req_params2
= implode(
"&"
,
$req_params_array
);
$req_uri
= sprintf(
"%s%s?%s"
,
$req_method
,
$req_api
,
$req_params2
);
$req_signature
= urlencode(
base64_encode
(hash_hmac(
'sha256'
,
$req_uri
,
$req_secretkey
, true)));
// urlencode(xxx)
$req_url
= sprintf(
"https://%s?%s&Signature=%s"
,
$req_api
,
$req_params2
,
$req_signature
);
$res
= curl_url(
$req_url
);
$retry_idx
= 0;
while
(
empty
(
$res
) &&
$retry_idx
<
$retry_NUM
) {
$retry_idx
+= 1;
$res
= curl_url(
$req_url
);
}
if
(!
empty
(
$res
)) {
$resJson
= json_decode(
$res
, true);
$resJson
=
$resJson
[
'Response'
];
echo
sprintf(
"<br><br> +++++ action : %s <br><br> resJson: "
,
$req_action
);
print_r(
$resJson
);
return
$resJson
;
}
else
{
return
null;
}
}
$req_action_query
=
'DescribeAddresses'
;
// 查询弹性IP
$req_action_unbind
=
'DisassociateAddress'
;
// 解绑弹性IP
$req_action_release
=
'ReleaseAddresses'
;
// 释放弹性IP
$req_action_transform
=
'TransformAddress'
;
// 公网IP转弹性IP
$req_region
=
'ap-guangzhou'
;
$req_extra_params
=
''
;
// 1. 查询弹性IP列表
$resJson
= qcloud_eip_sign(
$req_action_query
,
$req_region
);
var_dump(
$resJson
);
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运行结果：
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req_url: https:
//eip
.api.qcloud.com
/v2/index
.php?Action=DescribeAddresses&Nonce=585269&Region=ap-guangzhou&SecretId=AKIDSmAAAA2DABCDpTkBBBBMLMFwY0HM1234&SignatureMethod=HmacSHA256&Timestamp=1520429723&Version=2017-03-12&Signature=8U6i3BKBWYWoit3t1egIE9ZC%2BdWtI46QuHLc%2FbhaWWg%3D
array (size=3)
'TotalCount'
=> int 1
'AddressSet'
=>
array (size=1)
0 =>
array (size=11)
'AddressId'
=> string
'eip-qy123abc'
(length=12)
'AddressName'
=> null
'AddressIp'
=> string
'111.230.123.234'
(length=15)
'AddressStatus'
=> string
'BIND'
(length=4)
'InstanceId'
=> string
'ins-fabc1234'
(length=12)
'NetworkInterfaceId'
=> null
'PrivateAddressIp'
=> string
'10.104.245.26'
(length=14)
'IsArrears'
=> boolean
false
'IsBlocked'
=> boolean
false
'IsEipDirectConnection'
=> boolean
false
'CreatedTime'
=> string
'2018-03-07T12:46:26Z'
(length=20)
'RequestId'
=> string
'ad28067e-d1f9-4c47-932e-6bba1d123456'
(length=36)
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代码说明：
1）函数抽象封装签名方法，方便管理维护，减少开发工作量
2）参数按照升序排列 explode(xxx) —> sort($req_params_array) —> implode(xxx)
3）签名方法，需要添加 urlencode，否则经常提示签名错误，原因是未urlencode会有一些 空格、加号(+)、等号(=)等特殊字符
$req_signature = urlencode(base64_encode(hash_hmac('sha256', $req_uri, $req_secretkey, true))); // urlencode(xxx)
Python 签名示例
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#!/usr/bin/env python
# -*- coding:utf-8 -*-
#
# mimvp.com
# 2018-01-08
import
time, datetime, os, json
import
urllib, urllib2
import
hashlib, base64, hmac, random
import
logging
import
logging.handlers
import
sys
reload
(sys)
sys.setdefaultencoding(
'utf-8'
)
## 腾讯云API接口签名
def
qcloud_eip_sign(req_action
=
'DescribeAddresses'
, req_region
=
'ap-beijing'
, req_extra_params
=
'', retry_NUM
=
3
):
req_method
=
'GET'
# GET POST
req_api
=
'eip.api.qcloud.com/v2/index.php'
req_version
=
'2017-03-12'
req_timestamp
=
int
(time.time())
# 1520422452
req_nonce
=
random.randint(
1000
,
1000000
)
# 随机正整数
req_secretid
=
QCLOUD_SecretId
# 密钥ID，用作参数
req_secretkey
=
QCLOUD_SecretKey
# 密钥key，用作加密
req_signature_method
=
'HmacSHA256'
# HmacSHA1(默认), HmacSHA256
req_signature
=
''
# req_uri = "https://eip.api.qcloud.com/v2/index.php?Action=DescribeAddresses
# &Version=2017-03-12
# &AddressIds.1=eip-hxlqja90
# &Region=ap-beijing
# &Timestamp=1402992826
# &Nonce=345122
# &Signature=pStJagaKsV2QdkJnBQWYBDByZ9YPBsOi
# &SecretId=AKIDpY8cxBD2GLGK9sT0LaqIczGLFxTsoDF6
# 请求方法 + 请求主机 +请求路径 + ? + 请求字符串
req_params
=
"Action=%s&Region=%s&Version=%s&Timestamp=%s&Nonce=%s&SecretId=%s&SignatureMethod=%s%s"
%
(req_action, req_region, req_version, req_timestamp, req_nonce, req_secretid, req_signature_method, req_extra_params)
req_params_array
=
req_params.split(
'&'
)
req_params_array
=
sorted
(req_params_array)
# 以value排序，value值为 Action=DescribeAddresses 、 Region=ap-beijing
req_params2
=
'&'
.join(req_params_array);
req_uri
=
"%s%s?%s"
%
(req_method, req_api, req_params2)
req_signature
=
urllib.quote( base64.b64encode(hmac.new(req_secretkey, req_uri, digestmod
=
hashlib.sha256).digest()) )
# urllib.quote(xxx)
req_url
=
"https://%s?%s&Signature=%s"
%
(req_api, req_params2, req_signature)
logger.info(
'qcloud_eip_sign() - req_url: %s'
%
(req_url))
res
=
spider_url(req_url)
retry_idx
=
0
;
while
not
res
and
retry_idx < retry_NUM:
retry_idx
+
=
1
res
=
spider_url(req_url)
if
res :
resJson
=
json.loads(res)
resJson
=
resJson[
'Response'
]
print
"<br><br> +++++ action : %s <br><br> resJson: "
%
(req_action,)
return
resJson
else
:
return
None
;
if
__name__
=
=
"__main__"
:
req_action_query
=
'DescribeAddresses'
# 查询弹性IP
req_action_unbind
=
'DisassociateAddress'
# 解绑弹性IP
req_action_release
=
'ReleaseAddresses'
# 释放弹性IP
req_action_transform
=
'TransformAddress'
# 公网IP转弹性IP
req_region
=
'ap-guangzhou'
req_extra_params
=
'';
# 1. 查询弹性IP列表
resJson
=
qcloud_eip_sign(req_action_query, req_region)
print
json.dumps(resJson)
|
运行结果：
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req_url: https:
//eip
.api.qcloud.com
/v2/index
.php?Action=DescribeAddresses&Nonce=383782&Region=ap-guangzhou&SecretId=AKIDSmAAAA2DABCDpTkBBBBMLMFwY0HM1234&SignatureMethod=HmacSHA256&Timestamp=1520430569&Version=2017-03-12&Signature=Tsgwx2GV/%2BopDlHiMUg3H
/rpIbQ5jPfe9tW3w9Slom4
%3D
{
"Response"
: {
"TotalCount"
: 1,
"AddressSet"
: [
{
"AddressId"
:
"eip-qy123abc"
,
"AddressName"
: null,
"AddressIp"
:
"111.230.123.234"
,
"AddressStatus"
:
"BIND"
,
"InstanceId"
:
"ins-fabc1234"
,
"NetworkInterfaceId"
: null,
"PrivateAddressIp"
:
"10.104.245.26"
,
"IsArrears"
:
false
,
"IsBlocked"
:
false
,
"IsEipDirectConnection"
:
false
,
"CreatedTime"
:
"2018-03-07T12:46:26Z"
}
],
"RequestId"
:
"c2ab3f7f-9796-4ade-afb1-6bba1d123456"
}
}
|
代码说明：
1）Python改写PHP代码，有一些细节，如 int(time.time())、random.randint(1000, 1000000)、sorted(req_params_array)等
2）参数按照升序排列 xxx.split('&') —> sort($req_params_array) —> '&'.join(xxx)
3）签名方法，需要添加 urllib.quote、base64.b64encode(xxx)、digest() 等，否则经常提示签名错误
req_signature = urllib.quote( base64.b64encode(hmac.new(req_secretkey, req_uri, digestmod=hashlib.sha256).digest()) ) # urllib.quote(xxx)
Python 代码里，特别要注意 hmac 签名 sha256 后获取的是 digest()，而不是 hexdigest() 这里错了会一直提示签名错误！
总结之PHP和Python的对应关系
1） PHP 签名
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// sha1
$hmac_sha1_str
=
base64_encode
(hash_hmac(
"sha1"
,
$data
,
$secret_access_key
));
// HMAC-SHA1加密
$signature
= urlencode(
$hmac_sha1_str
);
// 编码URL
// sha256
$hmac_sha256_str
=
base64_encode
(hash_hmac(
"sha256"
,
$data
,
$secret_access_key
));
// HMAC-SHA256加密
$signature
= urlencode(
$hmac_sha256_str
);
// 编码URL
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2）Python 签名
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import
urllib, base54, hashlib, hmac
# sha1
hmac_sha1_str
=
base64.b64encode( hmac.new(secret_access_key, data, digestmod
=
hashlib.sha1).digest() )
signature
=
urllib.quote(hmac_sha1_str)
# sha256
hmac_sha256_str
=
base64.b64encode( hmac.new(secret_access_key, data, digestmod
=
hashlib.sha256).digest() )
signature
=
urllib.quote(hmac_sha256_str)
# sha256
hmac_sha256_str
=
base64.b64encode( hmac.new(secret_access_key, data, digestmod
=
hashlib.sha256).hexdigest() )
# 16进制，错误
signature
=
urllib.quote(hmac_sha256_str)
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