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signatures.py
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Created
Sat, Oct 19, 03:10
Size
1 KB
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text/x-python
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Mon, Oct 21, 03:10 (1 d, 21 h)
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R3600 invenio-infoscience
signatures.py
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# -*- coding: utf-8 -*-
##
## This file is part of Invenio.
## Copyright (C) 2014 CERN.
##
## Invenio is free software; you can redistribute it and/or
## modify it under the terms of the GNU General Public License as
## published by the Free Software Foundation; either version 2 of the
## License, or (at your option) any later version.
##
## Invenio 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 Invenio; if not, write to the Free Software Foundation, Inc.,
## 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
import
re
import
hmac
from
hashlib
import
sha1
from
invenio.base.globals
import
cfg
def
get_hmac
(
message
):
"""
Helper function which calculates HMAC value.
"""
key
=
str
(
cfg
[
"WEBHOOKS_SECRET_KEY"
])
hmac_value
=
hmac
.
new
(
key
,
message
,
sha1
)
.
hexdigest
()
return
hmac_value
def
check_x_hub_signature
(
signature
,
message
):
"""
Checks X-Hub-Signature. Secret key to compare
signature: WEBHOOKS_SECRET_KEY.
"""
hmac_value
=
get_hmac
(
message
)
if
hmac_value
==
signature
or
\
(
signature
.
find
(
'='
)
>
-
1
and
\
hmac_value
==
signature
[
signature
.
find
(
'='
)
+
1
:]):
return
True
return
False
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