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-rw-r--r--sleekxmpp/plugins/xep_0235/stanza.py80
1 files changed, 80 insertions, 0 deletions
diff --git a/sleekxmpp/plugins/xep_0235/stanza.py b/sleekxmpp/plugins/xep_0235/stanza.py
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+++ b/sleekxmpp/plugins/xep_0235/stanza.py
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+"""
+ SleekXMPP: The Sleek XMPP Library
+ Copyright (C) 2012 Nathanael C. Fritz, Lance J.T. Stout
+ This file is part of SleekXMPP.
+
+ See the file LICENSE for copying permission.
+"""
+
+import hmac
+import hashlib
+import urllib
+import base64
+
+from sleekxmpp.xmlstream import ET, ElementBase, JID
+
+
+class OAuth(ElementBase):
+
+ name = 'oauth'
+ namespace = 'urn:xmpp:oauth:0'
+ plugin_attrib = 'oauth'
+ interfaces = set(['oauth_consumer_key', 'oauth_nonce', 'oauth_signature',
+ 'oauth_signature_method', 'oauth_timestamp',
+ 'oauth_token', 'oauth_version'])
+ sub_interfaces = interfaces
+
+ def generate_signature(self, stanza, sfrom, sto, consumer_secret,
+ token_secret, method='HMAC-SHA1'):
+ self['oauth_signature_method'] = method
+
+ request = urllib.quote('%s&%s' % (sfrom, sto), '')
+ parameters = urllib.quote('&'.join([
+ 'oauth_consumer_key=%s' % self['oauth_consumer_key'],
+ 'oauth_nonce=%s' % self['oauth_nonce'],
+ 'oauth_signature_method=%s' % self['oauth_signature_method'],
+ 'oauth_timestamp=%s' % self['oauth_timestamp'],
+ 'oauth_token=%s' % self['oauth_token'],
+ 'oauth_version=%s' % self['oauth_version']
+ ]), '')
+
+ sigbase = '%s&%s&%s' % (stanza, request, parameters)
+
+ consumer_secret = urllib.quote(consumer_secret, '')
+ token_secret = urllib.quote(token_secret, '')
+ key = '%s&%s' % (consumer_secret, token_secret)
+
+ if method == 'HMAC-SHA1':
+ sig = base64.b64encode(hmac.new(key, sigbase, hashlib.sha1).digest())
+ elif method == 'PLAINTEXT':
+ sig = key
+
+ self['oauth_signature'] = sig
+ return sig
+
+ def verify_signature(self, stanza, sfrom, sto, consumer_secret,
+ token_secret):
+ method = self['oauth_signature_method']
+
+ request = urllib.quote('%s&%s' % (sfrom, sto), '')
+ parameters = urllib.quote('&'.join([
+ 'oauth_consumer_key=%s' % self['oauth_consumer_key'],
+ 'oauth_nonce=%s' % self['oauth_nonce'],
+ 'oauth_signature_method=%s' % self['oauth_signature_method'],
+ 'oauth_timestamp=%s' % self['oauth_timestamp'],
+ 'oauth_token=%s' % self['oauth_token'],
+ 'oauth_version=%s' % self['oauth_version']
+ ]), '')
+
+ sigbase = '%s&%s&%s' % (stanza, request, parameters)
+
+ consumer_secret = urllib.quote(consumer_secret, '')
+ token_secret = urllib.quote(token_secret, '')
+ key = '%s&%s' % (consumer_secret, token_secret)
+
+ if method == 'HMAC-SHA1':
+ sig = base64.b64encode(hmac.new(key, sigbase, hashlib.sha1).digest())
+ elif method == 'PLAINTEXT':
+ sig = key
+
+ return self['oauth_signature'] == sig