HMAC SHA256十六进制字符串在Erlang中的消化，如何？ [英] HMAC SHA256 hex digest of a string in Erlang, how?

问题描述

我正在尝试与 Pusher.com 创建和维护的第三方实时Web消息系统进行互动。现在，我不能通过API发送任何东西，除非我产生一个 HMAC SHA256十六进制摘要我的数据。用 ruby​​ 写的示例源代码可以尝试说明：

I am trying to interact with third party real time Web messaging System created and maintained by Pusher.com. Now, i cannot send anything through the API unless i produce an HMAC SHA256 hex digest of my data. A sample source code written in ruby could try to illustrate this:

# Dependencies
# gem install ruby-hmac
#
require 'rubygems'
require 'hmac-sha2'

secret = '7ad3773142a6692b25b8'
string_to_sign = "POST\n/apps/3/channels/test_channel/events\nauth_key=278d425bdf160c739803&auth_timestamp=1272044395&auth_version=1.0&body_md5=7b3d404f5cde4a0b9b8fb4789a0098cb&name=foo"

hmac = HMAC::SHA256.hexdigest(secret, string_to_sign)

puts hmac
# >> 309fc4be20f04e53e011b00744642d3fe66c2c7c5686f35ed6cd2af6f202e445

我选中了 a href =http://www.erlang.org/doc/apps/crypto/index.html> erlang crypto库 ，我甚至不能生成 SHA256十六进制摘要直接


我如何在Erlang做这整个事情？ help ....



* UPDATE *


我在这里找到了解决方案： erlang中的sha256加密，他们带我去了 < a href =https://github.com/vinoski/erlsha2> erlsha2 。但是，我如何生成从这个模块输出的 SHA256 hexdigest 的 HMAC ？

I checked the erlang crypto Library and i cannot even generate a SHA256 hex digest "directly"

How do i do this whole thing in Erlang ? help....

* UPDATE *

I have found solutions here: sha256 encryption in erlang and they have led me to erlsha2. But still, how do i generate the HMAC of a SHA256 hexdigest output from this module ?

推荐答案

通过 erlsha2 ，使用以下代码获取与您的Ruby代码相同的代码：

With erlsha2, use the following to get the equivalent of your Ruby code:

1> hmac:hexlify(hmac:hmac256(<<"7ad3773142a6692b25b8">>, <<"POST\n/apps/3/channels/test_channel/events\nauth_key=278d425bdf160c739803&auth_timestamp=1272044395&auth_version=1.0&body_md5=7b3d404f5cde4a0b9b8fb4789a0098cb&name=foo">>)).
"309FC4BE20F04E53E011B00744642D3FE66C2C7C5686F35ED6CD2AF6F202E445"

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