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# This file is part of TALER
# (C) 2014, 2015, 2016 INRIA
#
# TALER is free software; you can redistribute it and/or modify
# it under the terms of the GNU Affero General Public License as
# published by the Free Software Foundation; either version 3, or
# (at your option) any later version.
#
# TALER is distributed in the hope that it will be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public
# License along with TALER; see the file COPYING. If not, see
# <http://www.gnu.org/licenses/>
#
# @author Marcello Stanisci
"""
definitions of JSON schemas for validating data
"""
import json
from validictory import validate
from validictory.validator import \
(RequiredFieldValidationError,
FieldValidationError)
from django.conf import settings
class UnknownCurrencyException(ValueError):
def __init__(self, hint, http_status_code):
self.hint = hint
self.http_status_code = http_status_code
super().__init__()
class URLParameterMissing(ValueError):
def __init__(self, param, http_status_code):
self.hint = "URL parameter '%s' is missing" % param
self.http_status_code = http_status_code
super().__init__()
class URLParameterMalformed(ValueError):
def __init__(self, param, http_status_code):
self.hint = "URL parameter '%s' is malformed" % param
self.http_status_code = http_status_code
super().__init__()
class JSONFieldException(ValueError):
def __init__(self, hint, http_status_code):
self.hint = hint
self.http_status_code = http_status_code
super().__init__()
'''
AMOUNT_SCHEMA = {
"type": "object",
"properties": {
"value": {"type": "integer"},
"fraction": {"type": "integer"},
"currency": {"type": "string",
"pattern": "^"+settings.TALER_CURRENCY+"$"}
}
}'''
AMOUNT_SCHEMA = {
"type": "string",
"pattern": "^"+settings.TALER_CURRENCY+":([0-9]+)\.?([0-9]+)?$"}
WITHDRAW_SESSION_SCHEMA = {
"type": "object",
"properties": {
"amount": {"type": AMOUNT_SCHEMA},
"reserve_pub": {"type": "string"},
"exchange_account_number": {"type": "integer"},
"sender_wiredetails": {
"type": "object",
"properties": {
"type": {"type": "string"},
"bank_url": {"type": "string"},
"account_number": {"type": "integer"}
}
}
}
}
WIREDETAILS_SCHEMA = {
"type": "object",
"properties": {
"test": {
"type": "object",
"properties": {
"type": {"type": "string"},
"account_number": {"type": "integer"},
"bank_url": {"type": "string"},
"name": {"type": "string", "required": False},
}
}
}
}
AUTH_SCHEMA = {
"type": "object",
"properties": {
"type": {"type": "string",
"pattern": "^basic$"},
"data": {"type": "object", "required": False}
}
}
REJECT_REQUEST_SCHEMA = {
"type": "object",
"properties": {
"auth": AUTH_SCHEMA,
"row_id": {"type": "integer"},
"account_number": {"type": "integer"}
}
}
HISTORY_REQUEST_SCHEMA = {
"type": "object",
"properties": {
"auth": {"type": "string", "pattern": "^basic$"},
"cancelled": {"type": "string",
"pattern": "^(omit|show)$",
"required": False},
"delta": {"type": "string",
"pattern": r"^([\+-])?([0-9])+$"},
"start": {"type": "string",
"pattern": "^([0-9]+)$",
"required": False},
"direction": {"type": "string",
"pattern": r"^(debit|credit|both|cancel\+|cancel-)$"},
"account_number": {"type": "string",
"pattern": "^([0-9]+)$",
"required": False}
}
}
INCOMING_REQUEST_SCHEMA = {
"type": "object",
"properties": {
"amount": {"type": AMOUNT_SCHEMA},
"subject": {"type": "string"},
"credit_account": {"type": "integer"},
"auth": AUTH_SCHEMA
}
}
PIN_TAN_ARGS = {
"type": "object",
"properties": {
"amount_value": {"format": "str_to_int"},
"amount_fraction": {"format": "str_to_int"},
"amount_currency": {"type": "string"},
"exchange": {"type": "string"},
"reserve_pub": {"type": "string"},
"exchange_wire_details": {"format": "wiredetails_string"}
}
}
def validate_pintan_types(validator, fieldname, value, format_option):
del validator # pacify PEP checkers
try:
if format_option == "str_to_int":
int(value)
if format_option == "wiredetails_string":
data = json.loads(value)
validate_wiredetails(data)
except Exception:
raise FieldValidationError(
"Malformed '%s'" % fieldname, fieldname, value)
def validate_pin_tan(data):
format_dict = {
"str_to_int": validate_pintan_types,
"wiredetails_string": validate_pintan_types}
validate(data, PIN_TAN_ARGS, format_validators=format_dict)
def validate_reject(data):
validate(data, REJECT_REQUEST_SCHEMA)
def validate_history(data):
validate(data, HISTORY_REQUEST_SCHEMA)
def validate_wiredetails(wiredetails):
validate(wiredetails, WIREDETAILS_SCHEMA)
def validate_add_incoming(data):
validate(data, INCOMING_REQUEST_SCHEMA)
def check_withdraw_session(data):
validate(data, WITHDRAW_SESSION_SCHEMA)
def validate_data(request, data):
switch = {
"/reject": validate_reject,
"/history": validate_history,
"/admin/add/incoming": validate_add_incoming,
"/pin/verify": check_withdraw_session,
"/pin/question": validate_pin_tan
}
try:
switch.get(request.path_info)(data)
except RequiredFieldValidationError as exc:
if request.method == "GET":
raise URLParameterMissing(exc.fieldname, 400)
raise JSONFieldException(
"Field '%s' is missing" % exc.fieldname, 400)
except FieldValidationError as exc:
if exc.fieldname == "currency":
raise UnknownCurrencyException("Unknown currency", 406)
if request.method == "GET":
raise URLParameterMalformed(exc.fieldname, 400)
raise JSONFieldException(
"Malformed '%s' field" % exc.fieldname, 400)
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