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KensoDev/wix_signature_default.rb

Created October 23, 2015 20:09
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Wix signature handle documentation
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wix_signature_default.rb
encoded_json_hack = encoded_json + ('=' * (4 - encoded_json.length.modulo(4)))
json_str = Base64.urlsafe_decode64(encoded_json_hack)
hmac = OpenSSL::HMAC.digest(OpenSSL::Digest::SHA256.new, APP_SECRET, encoded_json)
# bug in ruby. why are there '=' chars on urlsafe_encode ?!
my_signature = Base64.urlsafe_encode64(hmac).gsub('=','')
raise "the signatures do not match" if (signature != my_signature)
JSON.parse(json_str)
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