1 from geni.util.faults import *
2 from geni.util.excep import *
3 from geni.util.method import Method
4 from geni.util.parameter import Parameter, Mixed
5 from geni.util.auth import Auth
6 from geni.util.record import GeniRecord
7 from geni.util.credential import *
8 from geni.util.rights import *
9 from geni.util.debug import log
11 class get_credential(Method):
13 Retrive a credential for an object
14 If cred == Nonee then the behavior reverts to get_self_credential
16 @param cred credential object specifying rights of the caller
17 @param type type of object (user | slice | sa | ma | node)
18 @param hrn human readable name of object
20 @return the string representation of a credential object
23 interfaces = ['registry']
26 Mixed(Parameter(str, "credential"),
27 Parameter(None, "No credential")),
28 Parameter(str, "Human readable name (hrn)")
31 returns = Parameter(str, "String representation of a credential object")
33 def call(self, cred, type, hrn):
35 return self.get_self_credential(type, hrn)
37 self.api.auth.check(cred, 'getcredential')
38 self.api.auth.verify_object_belongs_to_me(hrn)
39 auth_hrn = self.api.auth.get_authority(hrn)
42 auth_info = self.api.auth.get_auth_info(auth_hrn)
44 table = self.api.auth.get_auth_table(auth_hrn)
45 records = table.resolve('*', hrn)
47 # verify_cancreate_credential requires that the member lists
48 # (researchers, pis, etc) be filled in
49 self.api.fill_record_info(record)
51 self.api.auth.verify_cancreate_credential(self.client_cred, record)
53 # TODO: Check permission that self.client_cred can access the object
55 object_gid = record.get_gid_object()
56 new_cred = Credential(subject = object_gid.get_subject())
57 new_cred.set_gid_caller(self.client_gid)
58 new_cred.set_gid_object(object_gid)
59 new_cred.set_issuer(key=auth_info.get_pkey_object(), subject=auth_hrn)
60 new_cred.set_pubkey(object_gid.get_pubkey())
62 rl = determine_rights(type, name)
63 new_cred.set_privileges(rl)
65 # determine the type of credential that we want to use as a parent for
68 if (type == "ma") or (type == "node"):
69 auth_kind = "authority,ma"
70 else: # user, slice, sa
71 auth_kind = "authority,sa"
73 new_cred.set_parent(self.api.auth.hierarchy.get_auth_cred(auth_hrn, kind=auth_kind))
78 return new_cred.save_to_string(save_parents=True)
80 def get_self_credential(self, type, hrn):
82 get_self_credential a degenerate version of get_credential used by a client
83 to get his initial credential when de doesnt have one. This is the same as
84 get_credetial(..., cred = None, ...)
86 The registry ensures that the client is the principal that is named by
87 (type, name) by comparing the public key in the record's GID to the
88 private key used to encrypt the client side of the HTTPS connection. Thus
89 it is impossible for one principal to retrive another principal's
90 credential without having the appropriate private key.
92 @param type type of object (user | slice | sa | ma | node)
93 @param hrn human readable name of authority to list
94 @return string representation of a credential object
96 self.api.auth.verify_object_belongs_to_me(hrn)
98 auth_hrn = self.api.auth.get_authority(hrn)
101 auth_info = self.api.auth.get_auth_info(auth_hrn)
103 # find a record that matches
105 table = self.api.auth.get_auth_table(auth_hrn)
106 records = table.resolve('*', hrn)
108 if type in ['*'] or rec.get_type() in [type]:
110 gid = record.get_gid_object()
111 peer_cert = self.api.auth.peer_cert
112 if not peer_cert.is_pubkey(gid.get_pubkey()):
113 raise ConnectionKeyGIDMismatch(gid.get_subject())
115 # create the credential
116 gid = record.get_gid_object()
117 cred = Credential(subject = gid.get_subject())
118 cred.set_gid_caller(gid)
119 cred.set_gid_object(gid)
120 cred.set_issuer(key=auth_info.get_pkey_object(), subject=auth_hrn)
121 cred.set_pubkey(gid.get_pubkey())
123 rl = determine_rights(type, hrn)
124 cred.set_privileges(rl)
126 # determine the type of credential that we want to use as a parent for
129 if (type == "ma") or (type == "node"):
130 auth_kind = "authority,ma"
131 else: # user, slice, sa
132 auth_kind = "authority,sa"
134 cred.set_parent(self.api.auth.hierarchy.get_auth_cred(auth_hrn, kind=auth_kind))
139 return cred.save_to_string(save_parents=True)