def discharge(ctx, content, key, locator, checker):
'''Handles a discharge request as received by the /discharge
endpoint.
@param ctx The context passed to the checker {checkers.AuthContext}
@param content URL and form parameters {dict}
@param locator Locator used to add third party caveats returned by
the checker {macaroonbakery.ThirdPartyLocator}
@param checker {macaroonbakery.ThirdPartyCaveatChecker} Used to check third
party caveats.
@return The discharge macaroon {macaroonbakery.Macaroon}
'''
id = content.get('id')
if id is None:
id = content.get('id64')
if id is not None:
id = utils.b64decode(id)
caveat = content.get('caveat64')
if caveat is not None:
caveat = utils.b64decode(caveat)
return bakery.discharge(
ctx,
id=id,
caveat=caveat,
key=key,
checker=checker,
locator=locator,
)
def interact(self, client, location, interaction_required_err):
'''Implement Interactor.interact by obtaining obtaining
a macaroon from the discharger, discharging it with the
local private key using the discharged macaroon as
a discharge token'''
p = interaction_required_err.interaction_method(
'agent', InteractionInfo)
if p.login_url is None or p.login_url == '':
raise httpbakery.InteractionError(
'no login-url field found in agent interaction method')
agent = self._find_agent(location)
if not location.endswith('/'):
location += '/'
login_url = urljoin(location, p.login_url)
# TODO use client to make the request.
resp = requests.get(login_url,
json={
'Username': agent.username,
'PublicKey': str(self._auth_info.key),
})
if resp.status_code != 200:
raise httpbakery.InteractionError(
'cannot acquire agent macaroon: {}'.format(resp.status_code))
m = resp.json().get('macaroon')
if m is None:
raise httpbakery.InteractionError('no macaroon in response')
m = bakery.Macaroon.from_dict(m)
ms = bakery.discharge_all(m, None, self._auth_info.key)
b = bytearray()
for m in ms:
b.extend(utils.b64decode(m.serialize()))
return httpbakery.DischargeToken(kind='agent', value=bytes(b))
def interact(self, client, location, interaction_required_err):
'''Implement Interactor.interact by obtaining obtaining
a macaroon from the discharger, discharging it with the
local private key using the discharged macaroon as
a discharge token'''
p = interaction_required_err.interaction_method('agent',
InteractionInfo)
if p.login_url is None or p.login_url == '':
raise httpbakery.InteractionError(
'no login-url field found in agent interaction method')
agent = self._find_agent(location)
if not location.endswith('/'):
location += '/'
login_url = urljoin(location, p.login_url)
resp = requests.get(
login_url, params={
'username': agent.username,
'public-key': str(self._auth_info.key.public_key)},
auth=client.auth())
if resp.status_code != 200:
raise httpbakery.InteractionError(
'cannot acquire agent macaroon: {} {}'.format(
resp.status_code, resp.text)
)
m = resp.json().get('macaroon')
if m is None:
raise httpbakery.InteractionError('no macaroon in response')
m = bakery.Macaroon.from_dict(m)
ms = bakery.discharge_all(m, None, self._auth_info.key)
b = bytearray()
for m in ms:
b.extend(utils.b64decode(m.serialize()))
return httpbakery.DischargeToken(kind='agent', value=bytes(b))
def add_macaroon(data):
try:
data = utils.b64decode(data)
data_as_objs = json.loads(data.decode('utf-8'))
except ValueError:
return
ms = [utils.macaroon_from_dict(x) for x in data_as_objs]
mss.append(ms)
def add_macaroon(data):
try:
data = utils.b64decode(data)
data_as_objs = json.loads(data.decode('utf-8'))
except ValueError:
return
ms = [utils.macaroon_from_dict(x) for x in data_as_objs]
mss.append(ms)
def from_dict(cls, json_dict):
'''Return a macaroon obtained from the given dictionary as
deserialized from JSON.
@param json_dict The deserialized JSON object.
'''
json_macaroon = json_dict.get('m')
if json_macaroon is None:
# Try the v1 format if we don't have a macaroon field.
m = pymacaroons.Macaroon.deserialize(
json.dumps(json_dict), json_serializer.JsonSerializer())
macaroon = Macaroon(root_key=None,
id=None,
namespace=legacy_namespace(),
version=_bakery_version(m.version))
macaroon._macaroon = m
return macaroon
version = json_dict.get('v', None)
if version is None:
raise ValueError('no version specified')
if (version < VERSION_3 or version > LATEST_VERSION):
raise ValueError('unknown bakery version {}'.format(version))
m = pymacaroons.Macaroon.deserialize(json.dumps(json_macaroon),
json_serializer.JsonSerializer())
if m.version != macaroon_version(version):
raise ValueError('underlying macaroon has inconsistent version; '
'got {} want {}'.format(
m.version, macaroon_version(version)))
namespace = checkers.deserialize_namespace(json_dict.get('ns'))
cdata = json_dict.get('cdata', {})
caveat_data = {}
for id64 in cdata:
id = b64decode(id64)
data = b64decode(cdata[id64])
caveat_data[id] = data
macaroon = Macaroon(root_key=None,
id=None,
namespace=namespace,
version=version)
macaroon._caveat_data = caveat_data
macaroon._macaroon = m
return macaroon
def from_dict(cls, json_dict):
'''Return a macaroon obtained from the given dictionary as
deserialized from JSON.
@param json_dict The deserialized JSON object.
'''
json_macaroon = json_dict.get('m')
if json_macaroon is None:
# Try the v1 format if we don't have a macaroon field.
m = pymacaroons.Macaroon.deserialize(
json.dumps(json_dict), json_serializer.JsonSerializer())
macaroon = Macaroon(root_key=None, id=None,
namespace=legacy_namespace(),
version=_bakery_version(m.version))
macaroon._macaroon = m
return macaroon
version = json_dict.get('v', None)
if version is None:
raise ValueError('no version specified')
if (version < VERSION_3 or
version > LATEST_VERSION):
raise ValueError('unknown bakery version {}'.format(version))
m = pymacaroons.Macaroon.deserialize(json.dumps(json_macaroon),
json_serializer.JsonSerializer())
if m.version != macaroon_version(version):
raise ValueError(
'underlying macaroon has inconsistent version; '
'got {} want {}'.format(m.version, macaroon_version(version)))
namespace = checkers.deserialize_namespace(json_dict.get('ns'))
cdata = json_dict.get('cdata', {})
caveat_data = {}
for id64 in cdata:
id = b64decode(id64)
data = b64decode(cdata[id64])
caveat_data[id] = data
macaroon = Macaroon(root_key=None, id=None,
namespace=namespace,
version=version)
macaroon._caveat_data = caveat_data
macaroon._macaroon = m
return macaroon
def _decode_macaroon_id(id):
storage_id = b''
base64_decoded = False
first = id[:1]
if first == b'A':
# The first byte is not a version number and it's 'A', which is the
# base64 encoding of the top 6 bits (all zero) of the version number 2
# or 3, so we assume that it's the base64 encoding of a new-style
# macaroon id, so we base64 decode it.
#
# Note that old-style ids always start with an ASCII character >= 4
# (> 32 in fact) so this logic won't be triggered for those.
try:
dec = b64decode(id.decode('utf-8'))
# Set the id only on success.
id = dec
base64_decoded = True
except:
# if it's a bad encoding, we'll get an error which is fine
pass
# Trim any extraneous information from the id before retrieving
# it from storage, including the UUID that's added when
# creating macaroons to make all macaroons unique even if
# they're using the same root key.
first = six.byte2int(id[:1])
if first == VERSION_2:
# Skip the UUID at the start of the id.
storage_id = id[1 + 16:]
if first == VERSION_3:
try:
id1 = id_pb2.MacaroonId.FromString(id[1:])
except google.protobuf.message.DecodeError:
raise VerificationError(
'no operations found in macaroon')
if len(id1.ops) == 0 or len(id1.ops[0].actions) == 0:
raise VerificationError(
'no operations found in macaroon')
ops = []
for op in id1.ops:
for action in op.actions:
ops.append(Op(op.entity, action))
return id1.storageId, ops
if not base64_decoded and _is_lower_case_hex_char(first):
# It's an old-style id, probably with a hyphenated UUID.
# so trim that off.
last = id.rfind(b'-')
if last >= 0:
storage_id = id[0:last]
return storage_id, [LOGIN_OP]
def add_macaroon(data):
data = utils.b64decode(data)
data_as_objs = json.loads(data.decode('utf-8'))
ms = [utils.macaroon_from_dict(x) for x in data_as_objs]
mss.append(ms)
