220 lines
7.8 KiB
Python
220 lines
7.8 KiB
Python
# -*- coding: utf-8 -*-
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from decimal import Decimal
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import binascii
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import hmac
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import hashlib
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import urlparse
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import urllib
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import string
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import datetime as dt
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import logging
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import re
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import Crypto.Cipher.DES
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from common import (PaymentCommon, URL, PaymentResponse, RECEIVED, ACCEPTED,
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PAID, ERROR)
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__all__ = ['Payment']
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KEY_DES_KEY = '\x45\x1f\xba\x4f\x4c\x3f\xd4\x97'
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IV = '\x30\x78\x30\x62\x2c\x30\x78\x30'
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REFERENCE = 'reference'
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ETAT = 'etat'
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SPCHECKOK = 'spcheckok'
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LOGGER = logging.getLogger(__name__)
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REFSFP = 'refsfp'
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# Pour un paiement comptant la chaine des états est: 1 -> 4 -> 10, seul l'état
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# 10 garanti le paiement
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SPPLUS_RESPONSE_CODES = {
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'1': 'Autorisation de paiement acceptée',
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'2': 'Autorisation de paiement refusée',
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'4': 'Echéance du paiement acceptée et en attente de remise',
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'5': 'Echéance du paiement refusée',
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'6': 'Paiement par chèque accepté',
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'8': 'Chèque encaissé',
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'10': 'Paiement terminé',
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'11': 'Echéance du paiement annulée par le commerçant',
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'12': 'Abandon de l\’internaute',
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'15': 'Remboursement enregistré',
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'16': 'Remboursement annulé',
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'17': 'Remboursement accepté',
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'20': 'Echéance du paiement avec un impayé',
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'21': 'Echéance du paiement avec un impayé et en attente de validation des services SP PLUS',
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'30': 'Echéance du paiement remisée',
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'99': 'Paiement de test en production',
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}
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VALID_STATE = ('1', '4', '10')
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ACCEPTED_STATE = ('1', '4')
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PAID_STATE = ('10',)
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TEST_STATE = ('99',)
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def decrypt_ntkey(ntkey):
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key = binascii.unhexlify(ntkey.replace(' ',''))
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return decrypt_key(key)
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def decrypt_key(key):
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CIPHER = Crypto.Cipher.DES.new(KEY_DES_KEY, Crypto.Cipher.DES.MODE_CBC, IV)
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return CIPHER.decrypt(key)
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def extract_values(query_string):
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kvs = query_string.split('&')
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result = []
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for kv in kvs:
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k, v = kv.split('=', 1)
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if k != 'hmac':
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result.append(v)
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return ''.join(result)
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def sign_ntkey_query(ntkey, query):
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key = decrypt_ntkey(ntkey)
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data_to_sign = extract_values(query)
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return hmac.new(key[:20], data_to_sign, hashlib.sha1).hexdigest().upper()
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PAIEMENT_FIELDS = [ 'siret', REFERENCE, 'langue', 'devise', 'montant',
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'taxe', 'validite' ]
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def sign_url_paiement(ntkey, query):
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if '?' in query:
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query = query[query.index('?')+1:]
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key = decrypt_ntkey(ntkey)
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data = urlparse.parse_qs(query, True)
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fields = [data.get(field,[''])[0] for field in PAIEMENT_FIELDS]
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data_to_sign = ''.join(fields)
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return hmac.new(key[:20], data_to_sign, hashlib.sha1).hexdigest().upper()
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ALPHANUM = string.letters + string.digits
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SERVICE_URL = "https://www.spplus.net/paiement/init.do"
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class Payment(PaymentCommon):
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description = {
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'caption': "SPPlus payment service of French bank Caisse d'epargne",
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'parameters': [
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{ 'name': 'cle',
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'caption': 'Secret key, a 40 digits hexadecimal number',
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'regexp': re.compile('^ *((?:[a-fA-F0-9] *){40}) *$')
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},
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{ 'name': 'siret',
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'caption': 'Siret of the entreprise augmented with the '
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'site number, example: 00000000000001-01',
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'regexp': re.compile('^ *(\d{14}-\d{2}) *$')
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},
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{ 'name': 'langue',
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'caption': 'Language of the customers',
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'default': 'FR',
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},
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{ 'name': 'taxe',
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'caption': 'Taxes',
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'default': '0.00'
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},
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{ 'name': 'modalite',
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'caption': '1x, 2x, 3x, xx, nx (if multiple separated by "/")',
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'default': '1x',
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},
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{ 'name': 'moyen',
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'caption': 'AUR, AMX, CBS, CGA, '
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'CHK, DIN, PRE (if multiple separate by "/")',
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'default': 'CBS',
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},
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]
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}
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devise = '978'
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def request(self, amount, name=None, address=None, email=None, phone=None,
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orderid=None, info1=None, info2=None, info3=None, next_url=None,
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logger=LOGGER, **kwargs):
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logger.debug('requesting spplus payment with montant %s email=%s and \
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next_url=%s' % (amount, email, next_url))
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reference = self.transaction_id(20, ALPHANUM, 'spplus', self.siret)
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validite = dt.date.today()+dt.timedelta(days=1)
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validite = validite.strftime('%d/%m/%Y')
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fields = { 'siret': self.siret,
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'devise': self.devise,
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'langue': self.langue,
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'taxe': self.taxe,
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'montant': str(Decimal(amount)),
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REFERENCE: orderid or reference,
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'validite': validite,
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'version': '1',
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'modalite': self.modalite,
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'moyen': self.moyen }
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if email:
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fields['email'] = email
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if next_url:
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if (not next_url.startswith('http://') \
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and not next_url.startswith('https://')) \
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or '?' in next_url:
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raise ValueError('next_url must be an absolute URL without parameters')
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fields['urlretour'] = next_url
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logger.debug('sending fields %s' % fields)
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query = urllib.urlencode(fields)
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url = '%s?%s&hmac=%s' % (SERVICE_URL, query, sign_url_paiement(self.cle,
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query))
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logger.debug('full url %s' % url)
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return reference, URL, url
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def response(self, query_string, logger=LOGGER, **kwargs):
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form = urlparse.parse_qs(query_string)
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for key, value in form.iteritems():
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form[key] = value[0]
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logger.debug('received query_string %s' % query_string)
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logger.debug('parsed as %s' % form)
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reference = form.get(REFERENCE)
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bank_status = []
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signed = False
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form[self.BANK_ID] = form.get(REFSFP)
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etat = form.get('etat')
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status = '%s: %s' % (etat, SPPLUS_RESPONSE_CODES.get(etat, 'Unknown code'))
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logger.debug('status is %s', status)
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bank_status.append(status)
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if 'hmac' in form:
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try:
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signed_data, signature = query_string.rsplit('&', 1)
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_, hmac = signature.split('=', 1)
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logger.debug('got signature %s' % hmac)
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computed_hmac = sign_ntkey_query(self.cle, signed_data)
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logger.debug('computed signature %s' % computed_hmac)
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signed = hmac == computed_hmac
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if not signed:
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bank_status.append('invalid signature')
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except ValueError:
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bank_status.append('invalid signature')
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test = False
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if etat in PAID_STATE:
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result = PAID
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elif etat in ACCEPTED_STATE:
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result = ACCEPTED
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elif etat in VALID_STATE:
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result = RECEIVED
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elif etat in TEST_STATE:
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result = RECEIVED # what else ?
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test = True
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else:
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result = ERROR
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response = PaymentResponse(
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result=result,
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signed=signed,
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bank_data=form,
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order_id=reference,
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transaction_id=form[self.BANK_ID],
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bank_status=' - '.join(bank_status),
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return_content=SPCHECKOK,
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test=test)
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return response
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if __name__ == '__main__':
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import sys
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ntkey = '58 6d fc 9c 34 91 9b 86 3f fd 64 63 c9 13 4a 26 ba 29 74 1e c7 e9 80 79'
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if len(sys.argv) == 2:
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print sign_url_paiement(ntkey, sys.argv[1])
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print sign_ntkey_query(ntkey, sys.argv[1])
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elif len(sys.argv) > 2:
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print sign_url_paiement(sys.argv[1], sys.argv[2])
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print sign_ntkey_query(sys.argv[1], sys.argv[2])
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