e407b78506
* Remove six for PY2 compatability since our dependencies are not, PY2 is legacy. * Removed usages of utils from future/past libraries since they are deprecated. This includes 'from __future__ ...' and 'from past...' statements. * Removed compatibility imports for PY2, switched from six imports to standard library imports. * Removed utils code blocks that handle operations depending on PY2/3 versions. * Removed 'from __future__ ...' lines from templates/code generators * Used PY3 syntaxes in place of PY2 compatible blocks. eg: metaclass
69 lines
2.2 KiB
Python
69 lines
2.2 KiB
Python
# Copyright (c) 2015, Frappe Technologies Pvt. Ltd. and Contributors
|
|
# MIT License. See license.txt
|
|
import hmac, hashlib
|
|
from urllib.parse import urlencode
|
|
from frappe import _
|
|
|
|
import frappe
|
|
import frappe.utils
|
|
|
|
def get_signed_params(params):
|
|
"""Sign a url by appending `&_signature=xxxxx` to given params (string or dict).
|
|
|
|
:param params: String or dict of parameters."""
|
|
if not isinstance(params, str):
|
|
params = urlencode(params)
|
|
|
|
signature = hmac.new(params.encode(), digestmod=hashlib.md5)
|
|
signature.update(get_secret().encode())
|
|
return params + "&_signature=" + signature.hexdigest()
|
|
|
|
def get_secret():
|
|
return frappe.local.conf.get("secret") or str(frappe.db.get_value("User", "Administrator", "creation"))
|
|
|
|
def verify_request():
|
|
"""Verify if the incoming signed request if it is correct."""
|
|
query_string = frappe.safe_decode(frappe.local.flags.signed_query_string or \
|
|
getattr(frappe.request, 'query_string', None))
|
|
|
|
valid = False
|
|
|
|
signature_string = '&_signature='
|
|
if signature_string in query_string:
|
|
params, signature = query_string.split(signature_string)
|
|
|
|
given_signature = hmac.new(params.encode('utf-8'), digestmod=hashlib.md5)
|
|
|
|
given_signature.update(get_secret().encode())
|
|
valid = signature == given_signature.hexdigest()
|
|
|
|
if not valid:
|
|
frappe.respond_as_web_page(_("Invalid Link"),
|
|
_("This link is invalid or expired. Please make sure you have pasted correctly."))
|
|
|
|
return valid
|
|
|
|
def get_url(cmd, params, nonce=None, secret=None):
|
|
if not nonce:
|
|
nonce = params
|
|
signature = get_signature(params, nonce, secret)
|
|
params['signature'] = signature
|
|
return frappe.utils.get_url("".join(['api/method/', cmd, '?', urlencode(params)]))
|
|
|
|
def get_signature(params, nonce, secret=None):
|
|
params = "".join((frappe.utils.cstr(p) for p in params.values()))
|
|
if not secret:
|
|
secret = frappe.local.conf.get("secret") or "secret"
|
|
|
|
signature = hmac.new(str(nonce), digestmod=hashlib.md5)
|
|
signature.update(secret)
|
|
signature.update(params)
|
|
return signature.hexdigest()
|
|
|
|
def verify_using_doc(doc, signature, cmd):
|
|
params = doc.get_signature_params()
|
|
return signature == get_signature(params, doc.get_nonce())
|
|
|
|
def get_url_using_doc(doc, cmd):
|
|
params = doc.get_signature_params()
|
|
return get_url(cmd, params, doc.get_nonce())
|