For decoding the base64-encoded smart health card string from the COVID vaccine digital record qr code.

Decode COVID smart health card data string.py

'''
Want to know exactly what is in your covid vaccine QR code issued to you?
Decode it with a QR code reader and paste it into the qr_data variable and run.

Credit to this post for the detailed explaination. 
source: https://marcan2020.medium.com/reversing-smart-health-cards-e765157fae9
'''
import re
import base64
import zlib
import json

# Test data
qr_data = "shc:/5676290952432060346029243740446031222959532654603460292540772804336028702864716745222809286133314564376531415906402203064504590856435503414245413640370636654171372412363803043756220467374075323239254334433260573601064137333912707426350769625364643945753638652852454535422237213876065244343160343853740855723835636810685712126967072534581208054242090543775073110024063411383336384168693404326438364025053330552640380527553266755975446326292974413411056375657045663941260836750066626744127412650663127253774252117654553004036442077072245263447552396237296363611221586172000544735026415257102476406874090854520923402064454566057720605333353934523368773871546530776725763450342565270512452950667144696836651240677707414450263141560604352333532003736845240800330361202740101109546920397733456645083937637609203027360726634458682836233328113628267258713820556229113823256320740622123930215842537423572004420710042656314532122903217620424036426535537233424468614545526029333777375400597640290855673469692837506528526454704235317710211074046236075568056803204261355358593854710965683963206060613074620371206276526908647361650966596729532435110866774371422326305965330806350309262568296071073576416838572162753826256111390939696044072526303708654339526630082969367063352624652758581035115720282541316556345038742028531057577664595060035950356103263224575274772852380524117676306959213045542735064574412725452105296452767569230552230407054459645772060333605629433612433458266759650955363961412506222210365642303659005505652370403040685523625756656041735607587042293709424506646233590554552026245328442240411032560021087508543027736505634128076253450922743327033912616606455705636141737439260957730567605771732564092369322610685243405706235524716655736168555859204110096054703057296325743307050338065932636944093409395007271232395239572967555621340812393377387667724370357625555064570306410670504157731153010937290945257435376870415523437024405223596237660372066530220454382258331044763532047171566835776037335324623255734037696245065352242275686423765336736726304164246669393374"

parts = re.findall('..', qr_data[5:])
# print(parts)

jws = ""
for p in parts:
  jws += chr(int(p)+ 45)
  
# print("jws:", jws)

def decode(data):
	missing_padding = len(data) % 4
	if missing_padding:
		data += '='* (4 - missing_padding)
	return base64.urlsafe_b64decode(data)

jws_parts = list(map(decode, jws.split(".")))
# print("jws parts:", jws_parts)

print("header:", jws_parts[0])

# https://bugs.python.org/issue5784
shc_data = zlib.decompress(jws_parts[1], wbits=-15)

json_object = json.loads(shc_data)
print("SHC Data:", json.dumps(json_object, indent=2))