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/satchmo/apps/payment/models.py

https://github.com/jtslade/satchmo-svn
Python | 128 lines | 107 code | 8 blank | 13 comment | 4 complexity | 98a6909deb0a3cb6b043f2e2d6af96fb MD5 | raw file
Possible License(s): BSD-3-Clause
  1. """
  2. Stores details about the available payment options.
  3. Also stores credit card info in an encrypted format.
  4. """
  5. from Crypto.Cipher import Blowfish
  6. from datetime import datetime
  7. from django.conf import settings
  8. from django.db import models
  9. from django.utils.translation import ugettext_lazy as _
  10. import keyedcache
  11. from livesettings import config_value, config_choice_values, SettingNotSet
  12. from satchmo_store.contact.models import Contact
  13. from payment.fields import PaymentChoiceCharField, CreditChoiceCharField
  14. from satchmo_store.shop.models import OrderPayment
  15. import config
  16. import base64
  17. import logging
  18. try:
  19. from decimal import Decimal
  20. except:
  21. from django.utils._decimal import Decimal
  22. log = logging.getLogger('payment.models')
  23. class PaymentOption(models.Model):
  24. """
  25. If there are multiple options - CC, Cash, COD, etc this class allows
  26. configuration.
  27. """
  28. description = models.CharField(_("Description"), max_length=20)
  29. active = models.BooleanField(_("Active"),
  30. help_text=_("Should this be displayed as an option for the user?"))
  31. optionName = PaymentChoiceCharField(_("Option Name"), max_length=20,
  32. unique=True,
  33. help_text=_("The class name as defined in payment.py"))
  34. sortOrder = models.IntegerField(_("Sort Order"))
  35. class Meta:
  36. verbose_name = _("Payment Option")
  37. verbose_name_plural = _("Payment Options")
  38. class CreditCardDetail(models.Model):
  39. """
  40. Stores an encrypted CC number, its information, and its
  41. displayable number.
  42. """
  43. orderpayment = models.ForeignKey(OrderPayment, unique=True,
  44. related_name="creditcards")
  45. credit_type = CreditChoiceCharField(_("Credit Card Type"), max_length=16)
  46. display_cc = models.CharField(_("CC Number (Last 4 digits)"),
  47. max_length=4, )
  48. encrypted_cc = models.CharField(_("Encrypted Credit Card"),
  49. max_length=40, blank=True, null=True, editable=False)
  50. expire_month = models.IntegerField(_("Expiration Month"))
  51. expire_year = models.IntegerField(_("Expiration Year"))
  52. card_holder = models.CharField(_("card_holder Name"), max_length=60, blank=True)
  53. start_month = models.IntegerField(_("Start Month"), blank=True, null=True)
  54. start_year = models.IntegerField(_("Start Year"), blank=True, null=True)
  55. issue_num = models.CharField(blank=True, null=True, max_length=2)
  56. def storeCC(self, ccnum):
  57. """Take as input a valid cc, encrypt it and store the last 4 digits in a visible form"""
  58. self.display_cc = ccnum[-4:]
  59. encrypted_cc = _encrypt_code(ccnum)
  60. if config_value('PAYMENT', 'STORE_CREDIT_NUMBERS'):
  61. self.encrypted_cc = encrypted_cc
  62. else:
  63. standin = "%s%i%i%i" % (self.display_cc, self.expire_month, self.expire_year, self.orderpayment.id)
  64. self.encrypted_cc = _encrypt_code(standin)
  65. key = _encrypt_code(standin + '-card')
  66. keyedcache.cache_set(key, skiplog=True, length=60*60, value=encrypted_cc)
  67. def setCCV(self, ccv):
  68. """Put the CCV in the cache, don't save it for security/legal reasons."""
  69. if not self.encrypted_cc:
  70. raise ValueError('CreditCardDetail expecting a credit card number to be stored before storing CCV')
  71. keyedcache.cache_set(self.encrypted_cc, skiplog=True, length=60*60, value=ccv)
  72. def getCCV(self):
  73. try:
  74. ccv = keyedcache.cache_get(self.encrypted_cc)
  75. except keyedcache.NotCachedError:
  76. ccv = ""
  77. return ccv
  78. ccv = property(fget=getCCV, fset=setCCV)
  79. def _decryptCC(self):
  80. ccnum = _decrypt_code(self.encrypted_cc)
  81. if not config_value('PAYMENT', 'STORE_CREDIT_NUMBERS'):
  82. try:
  83. key = _encrypt_code(ccnum + '-card')
  84. encrypted_ccnum = keyedcache.cache_get(key)
  85. ccnum = _decrypt_code(encrypted_ccnum)
  86. except keyedcache.NotCachedError:
  87. ccnum = ""
  88. return ccnum
  89. decryptedCC = property(_decryptCC)
  90. def _expireDate(self):
  91. return(str(self.expire_month) + "/" + str(self.expire_year))
  92. expirationDate = property(_expireDate)
  93. class Meta:
  94. verbose_name = _("Credit Card")
  95. verbose_name_plural = _("Credit Cards")
  96. def _decrypt_code(code):
  97. """Decrypt code encrypted by _encrypt_code"""
  98. secret_key = settings.SECRET_KEY
  99. encryption_object = Blowfish.new(secret_key)
  100. # strip padding from decrypted credit card number
  101. return encryption_object.decrypt(base64.b64decode(code)).rstrip('X')
  102. def _encrypt_code(code):
  103. """Quick encrypter for CC codes or code fragments"""
  104. secret_key = settings.SECRET_KEY
  105. encryption_object = Blowfish.new(secret_key)
  106. # block cipher length must be a multiple of 8
  107. padding = ''
  108. if (len(code) % 8) <> 0:
  109. padding = 'X' * (8 - (len(code) % 8))
  110. return base64.b64encode(encryption_object.encrypt(code + padding))