Class: OffsitePayments::Integrations::Migs::SecureHash

Inherits:
Object
  • Object
show all
Defined in:
lib/offsite_payments/integrations/migs.rb

Constant Summary collapse

DIGEST = 
OpenSSL::Digest.new('sha256')

Class Method Summary collapse

Class Method Details

.calculate(secure_hash, post) ⇒ Object 



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# File 'lib/offsite_payments/integrations/migs.rb', line 149

def self.calculate(secure_hash, post)
  post_without_secure_hash = post.reject { |k, _v| [:SecureHash, :SecureHashType].include? k }
  sorted_values = post_without_secure_hash.sort_by(&:to_s).map { |key, value| "vpc_#{key}=#{value}"}
  input = sorted_values.join('&')
  OpenSSL::HMAC.hexdigest(DIGEST, [secure_hash].pack('H*'), input).upcase
end