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 network= vars['NETWORK_SETTINGS']
37 auth['node_id']= vars['NODE_ID']
38 auth['node_ip']= network['ip']
39 node_key= vars['NODE_KEY']
43 params= serialize_params(call_params)
45 msg= "[" + "".join(params) + "]"
46 node_hmac= hmac.new(node_key,msg.encode('utf-8'),sha).hexdigest()
47 auth['value']= node_hmac
53 def serialize_params( call_params ):
55 convert a list of parameters into a format that will be used in the
56 hmac generation. both the boot manager and plc must have a common
57 format. full documentation is in the boot manager technical document,
58 but essentially we are going to take all the values (and keys for
59 dictionary objects), and put them into a list. sort them, and combine
60 them into one long string encased in a set of braces.
65 for param in call_params:
66 if isinstance(param,list) or isinstance(param,tuple):
67 values += serialize_params(param)
68 elif isinstance(param,dict):
69 values += serialize_params(param.values())
70 elif isinstance(param,xmlrpclib.Boolean):
71 # bool was not a real type in Python <2.3 and had to be
72 # marshalled as a custom type in xmlrpclib. Make sure that
73 # bools serialize consistently.
77 values.append("False")
79 values.append(unicode(param))
84 def call_api_function( vars, function, user_params ):
86 call the named api function with params, and return the
87 value to the caller. the authentication structure is handled
88 automatically, and doesn't need to be passed in with params.
90 If the call fails, a BootManagerException is raised.
95 api_server= vars['API_SERVER_INST']
97 raise BootManagerException, "No connection to the API server exists."
99 if api_server is None:
103 if i[0] == function and i[1] == user_params:
105 raise BootManagerException, \
106 "Disconnected operation failed, insufficient stash."
108 auth= create_auth_structure(vars,user_params)
110 raise BootManagerException, \
111 "Could not create auth structure, missing values."
114 params= params + user_params
117 exec( "rc= api_server.%s(*params)" % function )
120 stash += [ [ function, user_params, rc ] ]
122 except xmlrpclib.Fault, fault:
123 raise BootManagerException, "API Fault: %s" % fault
124 except xmlrpclib.ProtocolError, err:
125 raise BootManagerException,"XML RPC protocol error: %s" % err
126 except xml.parsers.expat.ExpatError, err:
127 raise BootManagerException,"XML parsing error: %s" % err
131 mntpnt = '/tmp/stash'
132 def __init__(self, vars, mode):
133 utils.makedirs(self.mntpnt)
135 utils.sysexec('mount -t auto -U %s %s' % (vars['DISCONNECTED_OPERATION'], self.mntpnt))
136 # make sure it's not read-only
137 f = file('%s/api.cache' % self.mntpnt, 'a')
139 file.__init__(self, '%s/api.cache' % self.mntpnt, mode)
141 utils.sysexec_noerr('umount %s' % self.mntpnt)
142 raise BootManagerException, "Couldn't find API-cache for disconnected operation"
146 utils.sysexec_noerr('umount %s' % self.mntpnt)
151 stash = cPickle.load(s)
156 if vars['DISCONNECTED_OPERATION']:
158 cPickle.dump(stash, s)