1 #----------------------------------------------------------------------
2 # Copyright (c) 2014 Raytheon BBN Technologies
4 # Permission is hereby granted, free of charge, to any person obtaining
5 # a copy of this software and/or hardware specification (the "Work") to
6 # deal in the Work without restriction, including without limitation the
7 # rights to use, copy, modify, merge, publish, distribute, sublicense,
8 # and/or sell copies of the Work, and to permit persons to whom the Work
9 # is furnished to do so, subject to the following conditions:
11 # The above copyright notice and this permission notice shall be
12 # included in all copies or substantial portions of the Work.
14 # THE WORK IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
15 # OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
16 # MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
17 # NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
18 # HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
19 # WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
20 # OUT OF OR IN CONNECTION WITH THE WORK OR THE USE OR OTHER DEALINGS
22 #----------------------------------------------------------------------
24 from __future__ import print_function
26 from sfa.util.sfalogging import logger
27 from sfa.trust.credential import Credential
28 from sfa.trust.abac_credential import ABACCredential
33 # Factory for creating credentials of different sorts by type.
34 # Specifically, this factory can create standard SFA credentials
35 # and ABAC credentials from XML strings based on their identifying content
37 class CredentialFactory:
39 UNKNOWN_CREDENTIAL_TYPE = 'geni_unknown'
41 # Static Credential class method to determine the type of a credential
42 # string depending on its contents
44 def getType(credString):
45 credString_nowhitespace = re.sub('\s', '', credString)
46 if credString_nowhitespace.find('<type>abac</type>') > -1:
47 return ABACCredential.ABAC_CREDENTIAL_TYPE
48 elif credString_nowhitespace.find('<type>privilege</type>') > -1:
49 return Credential.SFA_CREDENTIAL_TYPE
51 st = credString_nowhitespace.find('<type>')
52 end = credString_nowhitespace.find('</type>', st)
53 return credString_nowhitespace[st + len('<type>'):end]
54 # return CredentialFactory.UNKNOWN_CREDENTIAL_TYPE
56 # Static Credential class method to create the appropriate credential
57 # (SFA or ABAC) depending on its type
59 def createCred(credString=None, credFile=None):
60 if not credString and not credFile:
61 raise Exception("CredentialFactory.createCred called with no argument")
64 credString = open(credFile).read()
65 except Exception as e:
66 logger.info("Error opening credential file %s: %s" % credFile, e)
69 # Try to treat the file as JSON, getting the cred_type from the struct
71 credO = json.loads(credString, encoding='ascii')
72 if 'geni_value' in credO and 'geni_type' in credO:
73 cred_type = credO['geni_type']
74 credString = credO['geni_value']
75 except Exception as e:
76 # It wasn't a struct. So the credString is XML. Pull the type directly from the string
77 logger.debug("Credential string not JSON: %s" % e)
78 cred_type = CredentialFactory.getType(credString)
80 if cred_type == Credential.SFA_CREDENTIAL_TYPE:
82 cred = Credential(string=credString)
84 except Exception as e:
86 msg = "credString started: %s" % credString[:50]
87 raise Exception("%s not a parsable SFA credential: %s. " % (credFile, e) + msg)
89 raise Exception("SFA Credential not parsable: %s. Cred start: %s..." % (e, credString[:50]))
91 elif cred_type == ABACCredential.ABAC_CREDENTIAL_TYPE:
93 cred = ABACCredential(string=credString)
95 except Exception as e:
97 raise Exception("%s not a parsable ABAC credential: %s" % (credFile, e))
99 raise Exception("ABAC Credential not parsable: %s. Cred start: %s..." % (e, credString[:50]))
101 raise Exception("Unknown credential type '%s'" % cred_type)
103 if __name__ == "__main__":
104 c2 = open('/tmp/sfa.xml').read()
105 cred1 = CredentialFactory.createCred(credFile='/tmp/cred.xml')
106 cred2 = CredentialFactory.createCred(credString=c2)
108 print("C1 = %s" % cred1)
109 print("C2 = %s" % cred2)
110 c1s = cred1.dump_string()
111 print("C1 = %s" % c1s)
112 # print "C2 = %s" % cred2.dump_string()