1 # -*- coding: utf-8 -*-
3 oauthlib.oauth1.rfc5849.endpoints.base
4 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
6 This module is an implementation of various logic needed
7 for signing and checking OAuth 1.0 RFC 5849 requests.
9 from __future__ import absolute_import, unicode_literals
13 from oauthlib.common import Request, generate_token
15 from .. import signature, utils, errors
16 from .. import CONTENT_TYPE_FORM_URLENCODED
17 from .. import SIGNATURE_HMAC, SIGNATURE_RSA
18 from .. import SIGNATURE_TYPE_AUTH_HEADER
19 from .. import SIGNATURE_TYPE_QUERY
20 from .. import SIGNATURE_TYPE_BODY
23 class BaseEndpoint(object):
25 def __init__(self, request_validator, token_generator=None):
26 self.request_validator = request_validator
27 self.token_generator = token_generator or generate_token
29 def _get_signature_type_and_params(self, request):
30 """Extracts parameters from query, headers and body. Signature type
31 is set to the source in which parameters were found.
33 # Per RFC5849, only the Authorization header may contain the 'realm'
35 header_params = signature.collect_parameters(headers=request.headers,
36 exclude_oauth_signature=False, with_realm=True)
37 body_params = signature.collect_parameters(body=request.body,
38 exclude_oauth_signature=False)
39 query_params = signature.collect_parameters(uri_query=request.uri_query,
40 exclude_oauth_signature=False)
43 params.extend(header_params)
44 params.extend(body_params)
45 params.extend(query_params)
46 signature_types_with_oauth_params = list(filter(lambda s: s[2], (
47 (SIGNATURE_TYPE_AUTH_HEADER, params,
48 utils.filter_oauth_params(header_params)),
49 (SIGNATURE_TYPE_BODY, params,
50 utils.filter_oauth_params(body_params)),
51 (SIGNATURE_TYPE_QUERY, params,
52 utils.filter_oauth_params(query_params))
55 if len(signature_types_with_oauth_params) > 1:
56 found_types = [s[0] for s in signature_types_with_oauth_params]
57 raise errors.InvalidRequestError(
58 description=('oauth_ params must come from only 1 signature'
59 'type but were found in %s',
60 ', '.join(found_types)))
63 signature_type, params, oauth_params = signature_types_with_oauth_params[
66 raise errors.InvalidRequestError(
67 description='Missing mandatory OAuth parameters.')
69 return signature_type, params, oauth_params
71 def _create_request(self, uri, http_method, body, headers):
72 # Only include body data from x-www-form-urlencoded requests
73 headers = headers or {}
74 if ("Content-Type" in headers and
75 CONTENT_TYPE_FORM_URLENCODED in headers["Content-Type"]):
76 request = Request(uri, http_method, body, headers)
78 request = Request(uri, http_method, '', headers)
80 signature_type, params, oauth_params = (
81 self._get_signature_type_and_params(request))
83 # The server SHOULD return a 400 (Bad Request) status code when
84 # receiving a request with duplicated protocol parameters.
85 if len(dict(oauth_params)) != len(oauth_params):
86 raise errors.InvalidRequestError(
87 description='Duplicate OAuth2 entries.')
89 oauth_params = dict(oauth_params)
90 request.signature = oauth_params.get('oauth_signature')
91 request.client_key = oauth_params.get('oauth_consumer_key')
92 request.resource_owner_key = oauth_params.get('oauth_token')
93 request.nonce = oauth_params.get('oauth_nonce')
94 request.timestamp = oauth_params.get('oauth_timestamp')
95 request.redirect_uri = oauth_params.get('oauth_callback')
96 request.verifier = oauth_params.get('oauth_verifier')
97 request.signature_method = oauth_params.get('oauth_signature_method')
98 request.realm = dict(params).get('realm')
99 request.oauth_params = oauth_params
101 # Parameters to Client depend on signature method which may vary
102 # for each request. Note that HMAC-SHA1 and PLAINTEXT share parameters
103 request.params = [(k, v) for k, v in params if k != "oauth_signature"]
105 if 'realm' in request.headers.get('Authorization', ''):
106 request.params = [(k, v)
107 for k, v in request.params if k != "realm"]
111 def _check_transport_security(self, request):
112 # TODO: move into oauthlib.common from oauth2.utils
113 if (self.request_validator.enforce_ssl and
114 not request.uri.lower().startswith("https://")):
115 raise errors.InsecureTransportError()
117 def _check_mandatory_parameters(self, request):
118 # The server SHOULD return a 400 (Bad Request) status code when
119 # receiving a request with missing parameters.
120 if not all((request.signature, request.client_key,
121 request.nonce, request.timestamp,
122 request.signature_method)):
123 raise errors.InvalidRequestError(
124 description='Missing mandatory OAuth parameters.')
126 # OAuth does not mandate a particular signature method, as each
127 # implementation can have its own unique requirements. Servers are
128 # free to implement and document their own custom methods.
129 # Recommending any particular method is beyond the scope of this
130 # specification. Implementers should review the Security
131 # Considerations section (`Section 4`_) before deciding on which
133 # .. _`Section 4`: http://tools.ietf.org/html/rfc5849#section-4
134 if (not request.signature_method in
135 self.request_validator.allowed_signature_methods):
136 raise errors.InvalidSignatureMethodError(
137 description="Invalid signature, %s not in %r." % (
138 request.signature_method,
139 self.request_validator.allowed_signature_methods))
141 # Servers receiving an authenticated request MUST validate it by:
142 # If the "oauth_version" parameter is present, ensuring its value is
144 if ('oauth_version' in request.oauth_params and
145 request.oauth_params['oauth_version'] != '1.0'):
146 raise errors.InvalidRequestError(
147 description='Invalid OAuth version.')
149 # The timestamp value MUST be a positive integer. Unless otherwise
150 # specified by the server's documentation, the timestamp is expressed
151 # in the number of seconds since January 1, 1970 00:00:00 GMT.
152 if len(request.timestamp) != 10:
153 raise errors.InvalidRequestError(
154 description='Invalid timestamp size')
157 ts = int(request.timestamp)
160 raise errors.InvalidRequestError(
161 description='Timestamp must be an integer.')
164 # To avoid the need to retain an infinite number of nonce values for
165 # future checks, servers MAY choose to restrict the time period after
166 # which a request with an old timestamp is rejected.
167 if abs(time.time() - ts) > self.request_validator.timestamp_lifetime:
168 raise errors.InvalidRequestError(
169 description=('Timestamp given is invalid, differ from '
170 'allowed by over %s seconds.' % (
171 self.request_validator.timestamp_lifetime)))
173 # Provider specific validation of parameters, used to enforce
174 # restrictions such as character set and length.
175 if not self.request_validator.check_client_key(request.client_key):
176 raise errors.InvalidRequestError(
177 description='Invalid client key format.')
179 if not self.request_validator.check_nonce(request.nonce):
180 raise errors.InvalidRequestError(
181 description='Invalid nonce format.')
183 def _check_signature(self, request, is_token_request=False):
184 # ---- RSA Signature verification ----
185 if request.signature_method == SIGNATURE_RSA:
186 # The server verifies the signature per `[RFC3447] section 8.2.2`_
187 # .. _`[RFC3447] section 8.2.2`: http://tools.ietf.org/html/rfc3447#section-8.2.1
188 rsa_key = self.request_validator.get_rsa_key(
189 request.client_key, request)
190 valid_signature = signature.verify_rsa_sha1(request, rsa_key)
192 # ---- HMAC or Plaintext Signature verification ----
194 # Servers receiving an authenticated request MUST validate it by:
195 # Recalculating the request signature independently as described in
196 # `Section 3.4`_ and comparing it to the value received from the
197 # client via the "oauth_signature" parameter.
198 # .. _`Section 3.4`: http://tools.ietf.org/html/rfc5849#section-3.4
199 client_secret = self.request_validator.get_client_secret(
200 request.client_key, request)
201 resource_owner_secret = None
202 if request.resource_owner_key:
204 resource_owner_secret = self.request_validator.get_request_token_secret(
205 request.client_key, request.resource_owner_key, request)
207 resource_owner_secret = self.request_validator.get_access_token_secret(
208 request.client_key, request.resource_owner_key, request)
210 if request.signature_method == SIGNATURE_HMAC:
211 valid_signature = signature.verify_hmac_sha1(request,
212 client_secret, resource_owner_secret)
214 valid_signature = signature.verify_plaintext(request,
215 client_secret, resource_owner_secret)
216 return valid_signature