Created
July 17, 2021 20:42
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extraction des données du passe sanitaire incluses dans le QR-code UE
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| require 'uri' | |
| require 'base64' | |
| require 'cgi' | |
| require 'zlib' | |
| require 'pp' | |
| require 'cbor' | |
| # https://github.com/svnee/base54 | |
| module Base45 | |
| class Error < StandardError; end | |
| CHARSET = '0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ $%*+-./:' | |
| def self.encode(input) | |
| raise Error unless input.is_a? String | |
| bytes = input.bytes | |
| result = '' | |
| (0..bytes.length-1).step(2).each do |i| | |
| if bytes.length - i > 1 | |
| x = (bytes[i] << 8) + bytes[i + 1] | |
| e, x = x.divmod 45 * 45 | |
| d, c = x.divmod 45 | |
| result += CHARSET[c] + CHARSET[d] + CHARSET[e] | |
| else | |
| x = bytes[i] | |
| d, c = x.divmod 45 | |
| result += CHARSET[c] + CHARSET[d] | |
| end | |
| end | |
| result | |
| end | |
| def self.decode(input) | |
| raise Error unless input.is_a? String | |
| return [] if input.length.zero? | |
| begin | |
| result = [] | |
| buf = input.chars.map { |c| CHARSET.index(c) } | |
| (0..buf.length).step(3).each do |i| | |
| x = buf[i].to_i + buf[i + 1].to_i * 45 | |
| if buf.length - i >= 3 | |
| x = buf[i] + buf[i + 1] * 45 + buf[i + 2] * 45 * 45 | |
| x.divmod(256).each { |e| result << e } | |
| else | |
| result << x | |
| end | |
| end | |
| result | |
| rescue | |
| raise Error | |
| end | |
| end | |
| end | |
| data = File.read("passsani.txt") | |
| data = data.sub(/HC1\:/,"") | |
| dec = Base45.decode(data).pack("C*") | |
| begin | |
| dec = Zlib::Inflate.inflate(dec) | |
| rescue | |
| # not zlib | |
| end | |
| cose_data = CBOR.decode(dec) | |
| cose_value = cose_data.value | |
| phdrs_data, _uhdrs, cose_payload, _signers = cose_value | |
| phdrs = CBOR.decode(phdrs_data); | |
| raw_kid = phdrs[4] | |
| cbor_data = CBOR.decode(cose_payload) | |
| hcert=cbor_data[-260][1] | |
| pp hcert | |
| data = {} | |
| data[:firtname] = hcert["nam"]["gn"] | |
| data[:lastname] = hcert["nam"]["fn"] | |
| data[:birthday] = hcert["dob"] | |
| data[:vaccination_date] = hcert["v"][0]["dt"] | |
| data[:prophylactic_agent] = hcert["v"][0]["vp"] | |
| data[:doses_received] = hcert["v"][0]["dn"] | |
| data[:doses_expected] = hcert["v"][0]["sd"] | |
| pp data |
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