def decode(self):
if not self.xml:
return
doc = parseString(self.xml)
sigs = []
signed_cred = doc.getElementsByTagName("signed-credential")
# Is this a signed-cred or just a cred?
if len(signed_cred) > 0:
creds = signed_cred[0].getElementsByTagName("credential")
signatures = signed_cred[0].getElementsByTagName("signatures")
if len(signatures) > 0:
sigs = signatures[0].getElementsByTagName("Signature")
else:
creds = doc.getElementsByTagName("credential")
if creds is None or len(creds) == 0:
# malformed cred file
raise CredentialNotVerifiable("Malformed XML: No credential tag found")
# Just take the first cred if there are more than one
cred = creds[0]
self.set_refid(cred.getAttribute("xml:id"))
self.set_expiration(utcparse(getTextNode(cred, "expires")))
self.gidCaller = GID(string=getTextNode(cred, "owner_gid"))
self.gidObject = GID(string=getTextNode(cred, "target_gid"))
# Process privileges
privs = cred.getElementsByTagName("privileges")[0]
rlist = Rights()
for priv in privs.getElementsByTagName("privilege"):
kind = getTextNode(priv, "name")
deleg = str2bool(getTextNode(priv, "can_delegate"))
if kind == '*':
# Convert * into the default privileges for the credential's type
# Each inherits the delegatability from the * above
_ , type = urn_to_hrn(self.gidObject.get_urn())
rl = determine_rights(type, self.gidObject.get_urn())
for r in rl.rights:
r.delegate = deleg
rlist.add(r)
else:
rlist.add(Right(kind.strip(), deleg))
self.set_privileges(rlist)
# Is there a parent?
parent = cred.getElementsByTagName("parent")
if len(parent) > 0:
parent_doc = parent[0].getElementsByTagName("credential")[0]
parent_xml = parent_doc.toxml()
self.parent = Credential(string=parent_xml)
self.updateRefID()
# Assign the signatures to the credentials
for sig in sigs:
Sig = Signature(string=sig.toxml())
for cur_cred in self.get_credential_list():
if cur_cred.get_refid() == Sig.get_refid():
cur_cred.set_signature(Sig)
def determine_user_rights(self, caller_hrn, reg_record):
"""
Given a user credential and a record, determine what set of rights the
user should have to that record.
This is intended to replace determine_user_rights() and
verify_cancreate_credential()
"""
rl = Rights()
type = reg_record.type
if type == 'slice':
# researchers in the slice are in the DB as-is
researcher_hrns = [ user.hrn for user in reg_record.reg_researchers ]
# locating PIs attached to that slice
slice_pis=reg_record.get_pis()
pi_hrns = [ user.hrn for user in slice_pis ]
if (caller_hrn in researcher_hrns + pi_hrns):
rl.add('refresh')
rl.add('embed')
rl.add('bind')
rl.add('control')
rl.add('info')
elif type == 'authority':
pi_hrns = [ user.hrn for user in reg_record.reg_pis ]
if (caller_hrn == self.config.SFA_INTERFACE_HRN):
rl.add('authority')
rl.add('sa')
rl.add('ma')
if (caller_hrn in pi_hrns):
rl.add('authority')
rl.add('sa')
# NOTE: for the PL implementation, this 'operators' list
# amounted to users with 'tech' role in that site
# it seems like this is not needed any longer, so for now I just drop that
# operator_hrns = reg_record.get('operator',[])
# if (caller_hrn in operator_hrns):
# rl.add('authority')
# rl.add('ma')
elif type == 'user':
rl.add('refresh')
rl.add('resolve')
rl.add('info')
elif type == 'node':
rl.add('operator')
return rl
def set_privileges(self, privs):
if isinstance(privs, str):
self.privileges = Rights(string=privs)
else:
self.privileges = privs
def decode(self):
if not self.xml:
return
doc = parseString(self.xml)
sigs = []
signed_cred = doc.getElementsByTagName("signed-credential")
# Is this a signed-cred or just a cred?
if len(signed_cred) > 0:
creds = signed_cred[0].getElementsByTagName("credential")
signatures = signed_cred[0].getElementsByTagName("signatures")
if len(signatures) > 0:
sigs = signatures[0].getElementsByTagName("Signature")
else:
creds = doc.getElementsByTagName("credential")
if creds is None or len(creds) == 0:
# malformed cred file
raise CredentialNotVerifiable(
"Malformed XML: No credential tag found")
# Just take the first cred if there are more than one
cred = creds[0]
self.set_refid(cred.getAttribute("xml:id"))
self.set_expiration(utcparse(getTextNode(cred, "expires")))
self.gidCaller = GID(string=getTextNode(cred, "owner_gid"))
self.gidObject = GID(string=getTextNode(cred, "target_gid"))
# Process privileges
privs = cred.getElementsByTagName("privileges")[0]
rlist = Rights()
for priv in privs.getElementsByTagName("privilege"):
kind = getTextNode(priv, "name")
deleg = str2bool(getTextNode(priv, "can_delegate"))
if kind == '*':
# Convert * into the default privileges for the credential's type
# Each inherits the delegatability from the * above
_, type = urn_to_hrn(self.gidObject.get_urn())
rl = determine_rights(type, self.gidObject.get_urn())
for r in rl.rights:
r.delegate = deleg
rlist.add(r)
else:
rlist.add(Right(kind.strip(), deleg))
self.set_privileges(rlist)
# Is there a parent?
parent = cred.getElementsByTagName("parent")
if len(parent) > 0:
parent_doc = parent[0].getElementsByTagName("credential")[0]
parent_xml = parent_doc.toxml()
self.parent = Credential(string=parent_xml)
self.updateRefID()
# Assign the signatures to the credentials
for sig in sigs:
Sig = Signature(string=sig.toxml())
for cur_cred in self.get_credential_list():
if cur_cred.get_refid() == Sig.get_refid():
cur_cred.set_signature(Sig)
def determine_user_rights(self, caller_hrn, reg_record):
"""
Given a user credential and a record, determine what set of rights the
user should have to that record.
This is intended to replace determine_user_rights() and
verify_cancreate_credential()
"""
rl = Rights()
type = reg_record.type
if type == "slice":
# researchers in the slice are in the DB as-is
researcher_hrns = [user.hrn for user in reg_record.reg_researchers]
# locating PIs attached to that slice
slice_pis = reg_record.get_pis()
pi_hrns = [user.hrn for user in slice_pis]
if caller_hrn in researcher_hrns + pi_hrns:
rl.add("refresh")
rl.add("embed")
rl.add("bind")
rl.add("control")
rl.add("info")
elif type == "authority":
pi_hrns = [user.hrn for user in reg_record.reg_pis]
if caller_hrn == self.config.SFA_INTERFACE_HRN:
rl.add("authority")
rl.add("sa")
rl.add("ma")
if caller_hrn in pi_hrns:
rl.add("authority")
rl.add("sa")
# NOTE: for the PL implementation, this 'operators' list
# amounted to users with 'tech' role in that site
# it seems like this is not needed any longer, so for now I just drop that
# operator_hrns = reg_record.get('operator',[])
# if (caller_hrn in operator_hrns):
# rl.add('authority')
# rl.add('ma')
elif type == "user":
rl.add("refresh")
rl.add("resolve")
rl.add("info")
elif type == "node":
rl.add("operator")
return rl