3 # Copyright (c) 2003 Intel Corporation
6 # Copyright (c) 2004-2006 The Trustees of Princeton University
11 import xml.parsers.expat
18 from Exceptions import *
22 def create_auth_structure( vars, call_params ):
24 create and return an authentication structure for a Boot API
25 call. Vars contains the boot manager runtime variables, and
26 call_params is a tuple of the parameters that will be passed to the
27 API call. Return None if unable to (typically due to missing
28 keys in vars, such as node_id or node_key)
32 auth['AuthMethod']= 'hmac'
35 auth['node_id'] = vars['NODE_ID']
36 auth['node_ip'] = vars['NETWORK_SETTINGS']['ip']
40 #params= serialize_params(call_params)
42 #msg= "[" + "".join(params) + "]"
43 #node_hmac= hmac.new(vars['NODE_KEY'], msg.encode('utf-8'), sha).hexdigest()
44 node_hmac= hmac.new(vars['NODE_KEY'], "[]".encode('utf-8'), sha).hexdigest()
45 auth['value']= node_hmac
48 if not vars.has_key('SESSION'):
49 session = vars['API_SERVER_INST'].GetSession(auth)
50 auth_session['session'] = session
51 vars['SESSION'] = session
53 auth_session['session'] = vars['SESSION']
54 auth_session['AuthMethod'] = 'session'
63 def serialize_params( call_params ):
65 convert a list of parameters into a format that will be used in the
66 hmac generation. both the boot manager and plc must have a common
67 format. full documentation is in the boot manager technical document,
68 but essentially we are going to take all the values (and keys for
69 dictionary objects), and put them into a list. sort them, and combine
70 them into one long string encased in a set of braces.
75 for param in call_params:
76 if isinstance(param,list) or isinstance(param,tuple):
77 values += serialize_params(param)
78 elif isinstance(param,dict):
79 values += serialize_params(param.values())
80 elif isinstance(param,xmlrpclib.Boolean):
81 # bool was not a real type in Python <2.3 and had to be
82 # marshalled as a custom type in xmlrpclib. Make sure that
83 # bools serialize consistently.
87 values.append("False")
89 values.append(unicode(param))
94 def call_api_function( vars, function, user_params ):
96 call the named api function with params, and return the
97 value to the caller. the authentication structure is handled
98 automatically, and doesn't need to be passed in with params.
100 If the call fails, a BootManagerException is raised.
105 api_server= vars['API_SERVER_INST']
107 raise BootManagerException, "No connection to the API server exists."
109 if api_server is None:
113 if i[0] == function and i[1] == user_params:
115 raise BootManagerException, \
116 "Disconnected operation failed, insufficient stash."
118 auth= create_auth_structure(vars,user_params)
120 raise BootManagerException, \
121 "Could not create auth structure, missing values."
124 params= params + user_params
127 exec( "rc= api_server.%s(*params)" % function )
130 stash += [ [ function, user_params, rc ] ]
132 except xmlrpclib.Fault, fault:
133 raise BootManagerException, "API Fault: %s" % fault
134 except xmlrpclib.ProtocolError, err:
135 raise BootManagerException,"XML RPC protocol error: %s" % err
136 except xml.parsers.expat.ExpatError, err:
137 raise BootManagerException,"XML parsing error: %s" % err
141 mntpnt = '/tmp/stash'
142 def __init__(self, vars, mode):
143 utils.makedirs(self.mntpnt)
145 utils.sysexec('mount -t auto -U %s %s' % (vars['DISCONNECTED_OPERATION'], self.mntpnt))
146 # make sure it's not read-only
147 f = file('%s/api.cache' % self.mntpnt, 'a')
149 file.__init__(self, '%s/api.cache' % self.mntpnt, mode)
151 utils.sysexec_noerr('umount %s' % self.mntpnt)
152 raise BootManagerException, "Couldn't find API-cache for disconnected operation"
156 utils.sysexec_noerr('umount %s' % self.mntpnt)
161 stash = cPickle.load(s)
166 if vars['DISCONNECTED_OPERATION']:
168 cPickle.dump(stash, s)