Module: OffsitePayments::Integrations::Paytm

Defined in:
lib/offsite_payments/integrations/paytm.rb

Defined Under Namespace

Classes: Helper, Notification, Return

Constant Summary collapse

CIPHER = 
'AES-128-CBC'
SALT_ALPHABET = 
['a'..'z', 'A'..'Z', '0'..'9'].flat_map { |i| i.to_a }
SALT_LENGTH = 
4
STATIC_IV = 
'@@@@&&&&####$$$$'

Class Method Summary collapse

Class Method Details

.checksum(hash, salt = nil) ⇒ Object 



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# File 'lib/offsite_payments/integrations/paytm.rb', line 30

def self.checksum(hash, salt = nil)
  if salt.nil?
    salt = SALT_LENGTH.times.map { SALT_ALPHABET[SecureRandom.random_number(SALT_ALPHABET.length)] }.join
  end

  values = hash.sort.to_h.values
  values << salt
  Digest::SHA256.hexdigest(values.join('|')) + salt
end

.encrypt(data, key) ⇒ Object 



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# File 'lib/offsite_payments/integrations/paytm.rb', line 40

def self.encrypt(data, key)
  aes = OpenSSL::Cipher.new(CIPHER)
  aes.encrypt
  aes.key = key
  aes.iv = STATIC_IV

  encrypted_data = aes.update(data) + aes.final
  Base64.strict_encode64(encrypted_data)
end

.notification(post, options = {}) ⇒ Object 



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# File 'lib/offsite_payments/integrations/paytm.rb', line 22

def self.notification(post, options = {})
  Notification.new(post, options)
end

.return(post, options = {}) ⇒ Object 



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# File 'lib/offsite_payments/integrations/paytm.rb', line 26

def self.return(post, options = {})
  Return.new(post, options)
end

.service_url ⇒ Object 



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# File 'lib/offsite_payments/integrations/paytm.rb', line 18

def self.service_url
  OffsitePayments.mode == :production ? production_url : test_url
end