65 lines
2.1 KiB
Python
65 lines
2.1 KiB
Python
# Copyright (c) 2015, Frappe Technologies Pvt. Ltd. and Contributors
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# MIT License. See license.txt
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from __future__ import unicode_literals
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import hmac
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import urllib
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from frappe import _
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import frappe
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import frappe.utils
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def get_signed_params(params):
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"""Sign a url by appending `&_signature=xxxxx` to given params (string or dict).
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:param params: String or dict of parameters."""
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if not isinstance(params, basestring):
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params = urllib.urlencode(params)
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signature = hmac.new(params)
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signature.update(get_secret())
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return params + "&_signature=" + signature.hexdigest()
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def get_secret():
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return frappe.local.conf.get("secret") or str(frappe.db.get_value("User", "Administrator", "creation"))
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def verify_request():
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"""Verify if the incoming signed request if it is correct."""
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query_string = frappe.request.query_string if hasattr(frappe.request, "query_string") \
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else frappe.local.flags.signed_query_string
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params, signature = query_string.split("&_signature=")
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given_signature = hmac.new(params.encode("utf-8"))
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given_signature.update(get_secret())
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valid = signature == given_signature.hexdigest()
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if not valid:
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frappe.respond_as_web_page(_("Invalid Link"),
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_("This link is invalid or expired. Please make sure you have pasted correctly."))
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return valid
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def get_url(cmd, params, nonce=None, secret=None):
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if not nonce:
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nonce = params
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signature = get_signature(params, nonce, secret)
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params['signature'] = signature
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return frappe.utils.get_url("".join(['api/method/', cmd, '?', urllib.urlencode(params)]))
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def get_signature(params, nonce, secret=None):
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params = "".join((frappe.utils.cstr(p) for p in params.values()))
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if not secret:
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secret = frappe.local.conf.get("secret") or "secret"
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signature = hmac.new(str(nonce))
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signature.update(secret)
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signature.update(params)
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return signature.hexdigest()
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def verify_using_doc(doc, signature, cmd):
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params = doc.get_signature_params()
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return signature == get_signature(params, doc.get_nonce())
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def get_url_using_doc(doc, cmd):
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params = doc.get_signature_params()
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return get_url(cmd, params, doc.get_nonce())
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