WeChat Payment (refund result notification) Golang AES-256-ECB decryption

This is a creation in Article, where the information may have evolved or changed.

AES-256-ECB decryption of the returned data is required to process the notification of the payment of the refund result, and the Golang standard library does not support AES ECB plus decryption, which is hereby recorded.

First, the way of decryption

The decryption steps are as follows

1. Encrypt string A To do base64 decoding, get encrypted string b
2. Do MD5 to merchant key, get 32 bit lowercase key* (key set path: Merchant Platform (pay.weixin.qq.com) –> account Settings –>api security –> key setting)
3. Use key* to encrypt string B to do AES-256-ECB decryption

Second, Golang sample code

Package Mainimport ("Encoding/base64" "FMT" "Strings" "Github.com/nanjishidu/gomini/gocrypto") func main () {var (paykey = "ZIR0QKSTUFMOUOCHC9RFCDMFHECORQAP" Req_info = ' yywp8c48th0wnqztqei+41pflb26v+smfj9z6h9rpbgxtyzyxc+4ynez7qegznwj/ 6rib2mfywmzmcc41cfjksssoszpxxohuayb6kvnsz1p6frox1pdwzhyruxk7ounnd+gdsg4yz0xxzsl4/pynwllba/71qrnkj/ Bhcbyk4exnglju5dlup9pjqsntxjomi9rxu57m9jg5llqfxmwxyeaszjnvof0ulnhlwjsws4oxkokmw7veykylgv6npoom03qsx2wkrxlssa9gppg4hdareeu qh1fmbm7awjyrvyt/mezwg98p4gomeiyvz34xfdnctezx4bf/zislxt79ae1/ytzryfymxecrgjlbe0rg/t2ezjhac870u2vsvby1/ kce2a443n+denazixlbq1aewq3rqk/o6/tmm0lomzgctaoiamg+bh5+gu1uba9o3e+vehulydd5qx2o6i3+ qa9orbh415nyrrqdefq5vmcirikp5xyptwigza0tkoalkmpq4nde5gwhqibbgpfulzwoki+qjjhhbmwgbd6j0vqprorwouzc/ bhdkp72dcdncm7idupggnzbiy0+sewikcherykjge3ydhpjeqcqrah0cgxxhdt1xtbqbst1vqfyuhphujdxmxrknrgpn/oe1t0rlrq+78ci+ k8xe5e6seeuxqsee8r3358mpcdysmxwsxvzxk6er9ef98apqhwcndyejd2yych/mmvherux+7kjlrxsinuwa/cv/ Xakfquvuya5ea2eywtprha4dpyuf1snsaqvkfgqkxzrjhfagslvpsvqupx4zkkszhf4kwmzo3m7j1p94mxa7tm9mtojepoohpxeeb+m9rx6psfoi3mjdq5inj+vc4gokg/wd/lqiy6ttyp/dhdn6/v+aujx5axbo/ 2ndd3fwhhjkqekiuarr2clzt9zrqo4hkxdzo7cn06sgchk48tg8pmxnxkcmzm7aoquv5ymim2gwswirjhwj8cupafihc+gesdlbf6zbt+/ kxkafjaqq2rklen+wvz/zfz113epgwpjp16twboziq96mmekvwky/vdhjol8vftgh9f61oy1xwf6djtpw== ') b, err: = base64. Stdencoding.decodestring (req_info) if err! = Nil {fmt. Println (b, Err) Return}gocrypto. Setaeskey (Strings. ToLower (Gocrypto. MD5 (Paykey))) plaintext, err: = Gocrypto. Aesecbdecrypt (b) if err! = Nil {fmt. PRINTLN (Err) return}fmt. Println (String (plaintext))}

Iii. third-party library of Golang

Support common encryption and decryption

github.com/nanjishidu/gomini/gocrypto