1 | #!/usr/local/bin/python |
---|
2 | |
---|
3 | import gtk |
---|
4 | import gobject |
---|
5 | |
---|
6 | import ABAC |
---|
7 | import Creddy |
---|
8 | |
---|
9 | import sys, os |
---|
10 | import re |
---|
11 | import copy |
---|
12 | import base64 |
---|
13 | import ConfigParser |
---|
14 | |
---|
15 | from tempfile import mkdtemp |
---|
16 | from shutil import rmtree |
---|
17 | |
---|
18 | class proof: |
---|
19 | def __init__(self, name, prover, role, principal, creds): |
---|
20 | self.name = name |
---|
21 | self.prover = prover |
---|
22 | self.role = role |
---|
23 | self.principal = principal |
---|
24 | self.ctxt = ABAC.Context() |
---|
25 | self.keyid_to_cn = { } |
---|
26 | self.cn_to_keyid = { } |
---|
27 | attrs = [] |
---|
28 | try: |
---|
29 | d = mkdtemp() |
---|
30 | for c in creds: |
---|
31 | cc = self.pem_to_der(c) |
---|
32 | succ = self.ctxt.load_id_chunk(cc) |
---|
33 | if succ == ABAC.ABAC_CERT_SUCCESS: |
---|
34 | try: |
---|
35 | fn = os.path.join(d, 'file.pem') |
---|
36 | f = open(fn, 'w') |
---|
37 | f.write(cc) |
---|
38 | f.close() |
---|
39 | cid = Creddy.ID(fn) |
---|
40 | base_cn = cn = re.sub('_ID.pem$','',cid.cert_filename()) |
---|
41 | i = 0 |
---|
42 | while cn in self.cn_to_keyid: |
---|
43 | cn = '%s%03d' % (base_cn, i) |
---|
44 | i += 1 |
---|
45 | self.cn_to_keyid[cn] = cid.keyid() |
---|
46 | self.keyid_to_cn[cid.keyid()] = cn |
---|
47 | except EnvironmentError, e: |
---|
48 | print >>sys.stderr, '%s: %s' % (e.filename, e.strerror) |
---|
49 | else: |
---|
50 | attrs.append(cc) |
---|
51 | for c in attrs: |
---|
52 | self.ctxt.load_attribute_chunk(c) |
---|
53 | finally: |
---|
54 | rmtree(d) |
---|
55 | |
---|
56 | |
---|
57 | @staticmethod |
---|
58 | def pem_to_der(c): |
---|
59 | pat = '-----BEGIN CERTIFICATE-----(.*)-----END CERTIFICATE' |
---|
60 | m = re.match(pat, c, re.DOTALL) |
---|
61 | if m: return base64.b64decode(m.group(1)) |
---|
62 | else: return c |
---|
63 | |
---|
64 | def replace_keyids(self, s): |
---|
65 | for k, v in self.keyid_to_cn.items(): |
---|
66 | s = re.sub(k, v, s) |
---|
67 | return s |
---|
68 | |
---|
69 | def __str__(self): |
---|
70 | s = 'Name: %s\n' % self.name |
---|
71 | s += 'Prover: %s\n' % self.prover |
---|
72 | s += 'Principal: %s\n' % self.principal |
---|
73 | s += 'Role: %s\n' % self.role |
---|
74 | s += 'Creds: \n' |
---|
75 | for c in self.ctxt.credentials(): |
---|
76 | s += self.replace_keyids( |
---|
77 | '%s <- %s\n' % ( c.head().string(), c.tail().string())) |
---|
78 | return s |
---|
79 | |
---|
80 | class window(gtk.Window): |
---|
81 | ''' |
---|
82 | The main GUI class. It presents the various TreeViews and menus to |
---|
83 | save/load/add, to add credentials, identities and actions and to change the |
---|
84 | policy translation variable. It keeps its current size and location in the |
---|
85 | .abac_policy_tool.cfg file in the user's home. |
---|
86 | ''' |
---|
87 | |
---|
88 | # Definition of the menus |
---|
89 | ui_def = ''' |
---|
90 | <ui> |
---|
91 | <menubar> |
---|
92 | <menu action="FileMenu"> |
---|
93 | <menuitem name="Load" action="FileLoad"/> |
---|
94 | <menuitem name="Quit" action="FileQuit"/> |
---|
95 | </menu> |
---|
96 | </menubar> |
---|
97 | </ui> |
---|
98 | ''' |
---|
99 | # Path to the configuration |
---|
100 | cfg_path = os.path.join(os.path.expanduser('~'), '.abac_proof_explainer.cfg') |
---|
101 | |
---|
102 | @staticmethod |
---|
103 | def wrapit(widget): |
---|
104 | ''' |
---|
105 | Put widget into a ScrolledWindow with automatic scrollbars on both |
---|
106 | directions, and return the ScrolledWindow. |
---|
107 | ''' |
---|
108 | sw = gtk.ScrolledWindow() |
---|
109 | sw.set_policy(gtk.POLICY_AUTOMATIC, gtk.POLICY_AUTOMATIC) |
---|
110 | sw.add(widget) |
---|
111 | return sw |
---|
112 | |
---|
113 | def translate_keyids(self, s): |
---|
114 | for k, n in self.key_to_name: |
---|
115 | s = re.sub(k, n, s) |
---|
116 | return s |
---|
117 | |
---|
118 | def makeListView(self, l, title): |
---|
119 | lm = gtk.ListStore(gobject.TYPE_STRING) |
---|
120 | tv = gtk.TreeView(lm) |
---|
121 | tv.append_column(gtk.TreeViewColumn(title, |
---|
122 | gtk.CellRendererText(), text=0)) |
---|
123 | for v in l: |
---|
124 | lm.append((self.translate_keyids(v),)) |
---|
125 | return tv |
---|
126 | |
---|
127 | |
---|
128 | def report_error(self, message): |
---|
129 | ''' |
---|
130 | Put a MessageDialog up with the given message. This is a member method |
---|
131 | so that it can be centered on the window. |
---|
132 | ''' |
---|
133 | md = gtk.MessageDialog(self, gtk.DIALOG_MODAL, |
---|
134 | gtk.MESSAGE_ERROR, gtk.BUTTONS_CLOSE, |
---|
135 | message) |
---|
136 | md.run() |
---|
137 | md.destroy() |
---|
138 | |
---|
139 | def __init__(self, fn): |
---|
140 | ''' |
---|
141 | Initialize all the GTK hooks for menus, put the various TreeViews up |
---|
142 | (connected to the policy) and read teh configuration for current |
---|
143 | position. |
---|
144 | ''' |
---|
145 | gtk.Window.__init__(self, gtk.WINDOW_TOPLEVEL) |
---|
146 | self.key_to_name = [] |
---|
147 | try: |
---|
148 | f = open('./names', 'r') |
---|
149 | for l in f: |
---|
150 | m = re.match('(\\S+)\s+(\\S+)', l) |
---|
151 | if m: |
---|
152 | self.key_to_name.append((m.group(1), m.group(2))) |
---|
153 | f.close() |
---|
154 | except EnvironmentError: |
---|
155 | pass |
---|
156 | |
---|
157 | self.set_title('ABAC Policy Tool') |
---|
158 | self.connect('destroy', self.quit) |
---|
159 | self.connect('show', self.shown) |
---|
160 | self.connect('configure-event', self.changed) |
---|
161 | self.pos = (0,0) |
---|
162 | self.size = (500, 500) |
---|
163 | self.read_config() |
---|
164 | self.proofs = [] |
---|
165 | |
---|
166 | # Make the Menus real |
---|
167 | ui = gtk.UIManager() |
---|
168 | ag = gtk.ActionGroup('action') |
---|
169 | ag.add_actions(( |
---|
170 | ('FileMenu', None, 'File'), |
---|
171 | ('FileQuit', gtk.STOCK_QUIT, None, None, None, self.quit), |
---|
172 | )) |
---|
173 | # load and append call the same method with different user data - |
---|
174 | # whether to clear current policy or not. |
---|
175 | ag.add_actions(( |
---|
176 | ('FileLoad', gtk.STOCK_OPEN, None, None, None, self.load), |
---|
177 | ), True) |
---|
178 | ui.insert_action_group(ag, -1) |
---|
179 | ui.add_ui_from_string(window.ui_def) |
---|
180 | |
---|
181 | # Put it all together and show it. |
---|
182 | mb = ui.get_widget('ui/menubar') |
---|
183 | vb = gtk.VBox() |
---|
184 | vb.pack_start(mb, False, False, 0) |
---|
185 | #vb.pack_start(nb, True, True, 0) |
---|
186 | |
---|
187 | self.add(vb) |
---|
188 | if fn is not None: |
---|
189 | self.read_proofs(fn) |
---|
190 | # XXX multiple proofs |
---|
191 | self.get_child().add(self.interpret_proof(self.proofs[0])) |
---|
192 | self.show_all() |
---|
193 | |
---|
194 | def quit(self, widget=None, data=None): |
---|
195 | ''' |
---|
196 | Called from File->Quit in the menu. Save location/size and exit |
---|
197 | ''' |
---|
198 | self.save_config() |
---|
199 | gtk.main_quit() |
---|
200 | |
---|
201 | def load(self, widget=None, data=None): |
---|
202 | ''' |
---|
203 | Called to either load or append to the loaded policy. data is the |
---|
204 | clearit parameter to the load call. Other than that, just put up a |
---|
205 | requester and do the thing. |
---|
206 | ''' |
---|
207 | d = gtk.FileChooserDialog('Load file', self, |
---|
208 | gtk.FILE_CHOOSER_ACTION_OPEN, ( |
---|
209 | gtk.STOCK_CANCEL, gtk.RESPONSE_CANCEL, |
---|
210 | gtk.STOCK_OK, gtk.RESPONSE_OK)) |
---|
211 | d.set_select_multiple(False) |
---|
212 | d.set_current_folder('.') |
---|
213 | d.set_do_overwrite_confirmation(True) |
---|
214 | rv = d.run() |
---|
215 | d.hide() |
---|
216 | if rv == gtk.RESPONSE_OK: |
---|
217 | self.read_proofs(d.get_filename()) |
---|
218 | # XXX multiple proofs |
---|
219 | self.get_child().add(self.interpret_proof(self.proofs[0])) |
---|
220 | self.show_all() |
---|
221 | d.destroy() |
---|
222 | |
---|
223 | |
---|
224 | def shown(self, w): |
---|
225 | ''' |
---|
226 | Handles an event where the window appears. Move to the saved position |
---|
227 | and size. |
---|
228 | ''' |
---|
229 | self.move(*self.pos) |
---|
230 | self.resize(*self.size) |
---|
231 | |
---|
232 | def changed(self, w, e): |
---|
233 | ''' |
---|
234 | Handles an event where the window changes (resizes or moves). Remember |
---|
235 | the size and position. |
---|
236 | ''' |
---|
237 | self.pos = self.get_position() |
---|
238 | self.size = self.get_size() |
---|
239 | |
---|
240 | def get_intpair(self, sect, opt): |
---|
241 | ''' |
---|
242 | Utility to pull a pair of integers from a configuration file. The size |
---|
243 | and position are thsi kind of data, so this is used a couple places. |
---|
244 | ''' |
---|
245 | if not self.cfg.has_section(sect): |
---|
246 | self.cfg.add_section(sect) |
---|
247 | |
---|
248 | if self.cfg.has_option(sect, opt): |
---|
249 | try: |
---|
250 | return [int(x) for x in self.cfg.get(sect, opt).split(',', 1)] |
---|
251 | except ValueError: |
---|
252 | return None |
---|
253 | else: |
---|
254 | return None |
---|
255 | |
---|
256 | def read_config(self): |
---|
257 | ''' |
---|
258 | Get the saved size and position from the config file, if any |
---|
259 | ''' |
---|
260 | self.cfg = ConfigParser.SafeConfigParser() |
---|
261 | self.cfg.read(window.cfg_path) |
---|
262 | |
---|
263 | self.pos = self.get_intpair('geom', 'pos') or ( 0, 0) |
---|
264 | self.size = self.get_intpair('geom', 'size') or ( 500, 500) |
---|
265 | |
---|
266 | |
---|
267 | def save_config(self): |
---|
268 | ''' |
---|
269 | Save the current postion to the default config file. |
---|
270 | ''' |
---|
271 | self.cfg.set('geom', 'pos', '%d,%d' % self.pos) |
---|
272 | self.cfg.set('geom', 'size', '%d,%d' % self.size) |
---|
273 | try: |
---|
274 | f = open(window.cfg_path, 'w') |
---|
275 | self.cfg.write(f) |
---|
276 | f.close() |
---|
277 | except EnvironmentError, e: |
---|
278 | pass |
---|
279 | |
---|
280 | def read_proofs(self, fn): |
---|
281 | self.proofs = [] |
---|
282 | try: |
---|
283 | f = open(fn, 'r') |
---|
284 | creds = [] |
---|
285 | for line in f: |
---|
286 | line = line.strip() |
---|
287 | if line == '<proof>': |
---|
288 | prover = None |
---|
289 | principal = None |
---|
290 | role = None |
---|
291 | creds = [] |
---|
292 | elif line == '</proof>' : |
---|
293 | p = proof(name, prover, role, principal, creds) |
---|
294 | ok, pp = p.ctxt.query(role, principal) |
---|
295 | if not ok: self.proofs.append(p) |
---|
296 | |
---|
297 | m = re.match('<comment>(.*)</comment>', line) |
---|
298 | if m is not None: |
---|
299 | name = m.group(1) |
---|
300 | |
---|
301 | m = re.match('<principal>([0-9a-f]+)</principal>', line) |
---|
302 | if m is not None: |
---|
303 | principal = m.group(1) |
---|
304 | |
---|
305 | m = re.match('<prover>([0-9a-f]+)</prover>', line) |
---|
306 | if m is not None: |
---|
307 | prover = m.group(1) |
---|
308 | |
---|
309 | m = re.match('<attribute>(.*)</attribute>', line) |
---|
310 | if m is not None: |
---|
311 | role = m.group(1) |
---|
312 | |
---|
313 | m = re.match('<credential>(.*)</credential>', line) |
---|
314 | if m is not None: |
---|
315 | creds.append(base64.b64decode(m.group(1))) |
---|
316 | f.close() |
---|
317 | except EnvironmentError, e: |
---|
318 | self.report_error("Cannot open %s: %s" % (e.filename, e.strerror)) |
---|
319 | return |
---|
320 | |
---|
321 | def interpret_proof(self, p): |
---|
322 | roles = set() |
---|
323 | direct_roles = {} |
---|
324 | groles = set() |
---|
325 | principals = set() |
---|
326 | goals = set() |
---|
327 | attrs = set() |
---|
328 | ok, proof = p.ctxt.query(p.role, p.principal) |
---|
329 | for c in p.ctxt.credentials(): |
---|
330 | role = c.tail() |
---|
331 | if role.is_principal(): |
---|
332 | if role.string() != p.principal: |
---|
333 | principals.add(role.string()) |
---|
334 | else: |
---|
335 | assigner, r = c.head().string().split('.') |
---|
336 | direct_roles[r] = assigner |
---|
337 | else: |
---|
338 | r = role.string() |
---|
339 | for s in r.split('&'): |
---|
340 | roles.add(s.strip()) |
---|
341 | groles.add(r) |
---|
342 | |
---|
343 | role = c.head() |
---|
344 | roles.add(role.string()) |
---|
345 | groles.add(role.string()) |
---|
346 | |
---|
347 | for r in groles: |
---|
348 | ok, proof = p.ctxt.query(p.role, r) |
---|
349 | if ok : |
---|
350 | goals.add(r) |
---|
351 | for r in roles: |
---|
352 | ok, proof = p.ctxt.query(r, p.principal) |
---|
353 | if ok: |
---|
354 | attrs.add(r) |
---|
355 | |
---|
356 | |
---|
357 | split_goals = [ [s.strip() for s in g.split('&')] for g in goals ] |
---|
358 | plans = [] |
---|
359 | for sg in split_goals: |
---|
360 | pl = [] |
---|
361 | for g in sg: |
---|
362 | if g in attrs: |
---|
363 | continue |
---|
364 | if g.count('.') == 2: |
---|
365 | # linking role |
---|
366 | pr, rr, lr = g.split('.') |
---|
367 | if lr in direct_roles: |
---|
368 | pl.append('add %s to %s' % (direct_roles[lr], rr)) |
---|
369 | else: |
---|
370 | pl.append('someone with %s.%s must delegate %s to %s' % \ |
---|
371 | (pr, rr, lr, p.principal)) |
---|
372 | elif g.count('.') == 1: |
---|
373 | pl.append('add %s to %s' % (g, principal)) |
---|
374 | plans.append('\n'.join(pl)) |
---|
375 | |
---|
376 | vb = gtk.VBox() |
---|
377 | vb.set_border_width(20) |
---|
378 | vb.pack_start( |
---|
379 | self.wrapit( |
---|
380 | self.makeListView([p.prover], "Entity Blocking Access") |
---|
381 | ), True, True,0) |
---|
382 | vb.pack_start( |
---|
383 | self.wrapit( |
---|
384 | self.makeListView(plans, "Suggested Actions") |
---|
385 | ), True, True,0) |
---|
386 | vb.pack_start( |
---|
387 | self.wrapit( |
---|
388 | self.makeListView(goals, "Required Slice Attributes") |
---|
389 | ), True, True,0) |
---|
390 | |
---|
391 | vb.pack_start( |
---|
392 | self.wrapit( |
---|
393 | self.makeListView(attrs, "Slice Attributes Present") |
---|
394 | ), True, True,0) |
---|
395 | vb.show_all() |
---|
396 | return vb |
---|
397 | |
---|
398 | if len(sys.argv) > 1: |
---|
399 | fn = sys.argv[1] |
---|
400 | else: |
---|
401 | fn = None |
---|
402 | w = window(fn) |
---|
403 | gtk.main() |
---|