如何从十六进制转换为摘要，反之亦然? [英] How to translate from a hexdigest to a digest and vice-versa?

问题描述

我想将散列存储为二进制(64字节).但是对于任何类型的API(Web服务)，我都希望将它们作为字符串传递. hashlib.hexdigest()将给我一个字符串，而 hashlib.digest()将给我二进制文件.但是，例如，如果我从磁盘读取二进制版本，该如何将其转换为字符串?而且，如果我从Web服务中读取字符串，该如何将其转换为二进制文件?

I want to store hashes as binary (64 bytes). But for any type of API (web service) I would want to pass them around as strings. hashlib.hexdigest() will give me a string, and hashlib.digest() will give me the binary. But if, for example, I read in the binary version from disk, how would I convert it to a string? And if I read in the string from a web service, how would I convert it to binary?

推荐答案

您可以从字符串版本开始传递并显示:

You could start with the string version to pass around and display:

>>> import hashlib
>>> string_version = hashlib.md5(b'hello world').hexdigest()

将其转换为二进制文件以将其写入磁盘:

Convert it to binary to write it to disk:

>>> save_as_binary = string_version.encode('utf-8')
>>> print(save_as_binary)
b'5eb63bbbe01eeed093cb22bb8f5acdc3'

从磁盘读回时，将其转换回字符串:

When reading it back from disk, convert it back to a string:

>>> back_to_string = save_as_binary.decode('utf-8')
>>> print(back_to_string)
5eb63bbbe01eeed093cb22bb8f5acdc3

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