在python中使用字符串+密钥计算SHA哈希 [英] Calculating a SHA hash with a string + secret key in python

问题描述

Amazon Product API 现在需要对我尝试使用 Python 生成的每个请求进行签名.

Amazon Product API now requires a signature with every request which I'm trying to generate ushing Python.

我被挂断的步骤是这个:

The step I get hung up on is this one:

使用上面的字符串和我们的虚拟"秘密访问密钥:1234567890，使用 SHA256 哈希算法计算符合 RFC 2104 的 HMAC.有关此步骤的更多信息，请参阅您的编程语言的文档和代码示例."

"Calculate an RFC 2104-compliant HMAC with the SHA256 hash algorithm using the string above with our "dummy" Secret Access Key: 1234567890. For more information about this step, see documentation and code samples for your programming language."

给定一个字符串和一个密钥(在本例中为 1234567890)我如何使用 Python 计算这个哈希?

Given a string and a secret key (in this case 1234567890) how do I calculate this hash using Python?

----------- 更新 -------------

----------- UPDATE -------------

第一个使用 HMAC.new 的解决方案看起来是正确的，但我得到的结果与它们不同.

The first solution using HMAC.new looks correct however I'm getting a different result than they are.

http://docs.amazonwebservices.com/AWSECommerceService/latest/DG/index.html?rest-signature.html

根据亚马逊的示例，当您对密钥 1234567890 和以下字符串进行散列时

According to Amazon's example when you hash the secret key 1234567890 and the following string

GET
webservices.amazon.com
/onca/xml
AWSAccessKeyId=00000000000000000000&ItemId=0679722769&Operation=I
temLookup&ResponseGroup=ItemAttributes%2COffers%2CImages%2CReview
s&Service=AWSECommerceService&Timestamp=2009-01-01T12%3A00%3A00Z&
Version=2009-01-06

您应该获得以下签名:'Nace+U3Az4OhN7tISqgs1vdLBHBEijWcBeCqL5xN9xg='

我得到这个:'411a59403c9f58b4a434c9c6a14ef6e363acc1d1bb2c6faf9adc30e20898c83b'

推荐答案

import hmac
import hashlib
import base64
dig = hmac.new(b'1234567890', msg=your_bytes_string, digestmod=hashlib.sha256).digest()
base64.b64encode(dig).decode()      # py3k-mode
'Nace+U3Az4OhN7tISqgs1vdLBHBEijWcBeCqL5xN9xg='

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