[af36abb] | 1 | #!/usr/local/bin/python |
---|
| 2 | |
---|
[39cd6e5] | 3 | import gtk |
---|
| 4 | import gobject |
---|
| 5 | |
---|
[af36abb] | 6 | import ABAC |
---|
| 7 | import Creddy |
---|
| 8 | |
---|
| 9 | import os |
---|
| 10 | import re |
---|
| 11 | import copy |
---|
| 12 | import base64 |
---|
[39cd6e5] | 13 | import ConfigParser |
---|
[af36abb] | 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 | |
---|
[39cd6e5] | 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 | |
---|
[08f776a] | 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): |
---|
[39cd6e5] | 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: |
---|
[08f776a] | 124 | lm.append((self.translate_keyids(v),)) |
---|
[39cd6e5] | 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): |
---|
| 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) |
---|
[08f776a] | 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 | |
---|
[39cd6e5] | 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 | self.show_all() |
---|
| 189 | |
---|
| 190 | def quit(self, widget=None, data=None): |
---|
| 191 | ''' |
---|
| 192 | Called from File->Quit in the menu. Save location/size and exit |
---|
| 193 | ''' |
---|
| 194 | self.save_config() |
---|
| 195 | gtk.main_quit() |
---|
| 196 | |
---|
| 197 | def load(self, widget=None, data=None): |
---|
| 198 | ''' |
---|
| 199 | Called to either load or append to the loaded policy. data is the |
---|
| 200 | clearit parameter to the load call. Other than that, just put up a |
---|
| 201 | requester and do the thing. |
---|
| 202 | ''' |
---|
| 203 | d = gtk.FileChooserDialog('Load file', self, |
---|
| 204 | gtk.FILE_CHOOSER_ACTION_OPEN, ( |
---|
| 205 | gtk.STOCK_CANCEL, gtk.RESPONSE_CANCEL, |
---|
| 206 | gtk.STOCK_OK, gtk.RESPONSE_OK)) |
---|
| 207 | d.set_select_multiple(False) |
---|
| 208 | d.set_current_folder('.') |
---|
| 209 | d.set_do_overwrite_confirmation(True) |
---|
| 210 | rv = d.run() |
---|
| 211 | d.hide() |
---|
| 212 | if rv == gtk.RESPONSE_OK: |
---|
| 213 | self.read_proofs(d.get_filename()) |
---|
| 214 | # XXX multiple proofs |
---|
| 215 | self.get_child().add(self.interpret_proof(self.proofs[0])) |
---|
| 216 | self.show_all() |
---|
| 217 | d.destroy() |
---|
| 218 | |
---|
| 219 | |
---|
| 220 | def shown(self, w): |
---|
| 221 | ''' |
---|
| 222 | Handles an event where the window appears. Move to the saved position |
---|
| 223 | and size. |
---|
| 224 | ''' |
---|
| 225 | self.move(*self.pos) |
---|
| 226 | self.resize(*self.size) |
---|
| 227 | |
---|
| 228 | def changed(self, w, e): |
---|
| 229 | ''' |
---|
| 230 | Handles an event where the window changes (resizes or moves). Remember |
---|
| 231 | the size and position. |
---|
| 232 | ''' |
---|
| 233 | self.pos = self.get_position() |
---|
| 234 | self.size = self.get_size() |
---|
| 235 | |
---|
| 236 | def get_intpair(self, sect, opt): |
---|
| 237 | ''' |
---|
| 238 | Utility to pull a pair of integers from a configuration file. The size |
---|
| 239 | and position are thsi kind of data, so this is used a couple places. |
---|
| 240 | ''' |
---|
| 241 | if not self.cfg.has_section(sect): |
---|
| 242 | self.cfg.add_section(sect) |
---|
| 243 | |
---|
| 244 | if self.cfg.has_option(sect, opt): |
---|
| 245 | try: |
---|
| 246 | return [int(x) for x in self.cfg.get(sect, opt).split(',', 1)] |
---|
| 247 | except ValueError: |
---|
| 248 | return None |
---|
| 249 | else: |
---|
| 250 | return None |
---|
| 251 | |
---|
| 252 | def read_config(self): |
---|
| 253 | ''' |
---|
| 254 | Get the saved size and position from the config file, if any |
---|
| 255 | ''' |
---|
| 256 | self.cfg = ConfigParser.SafeConfigParser() |
---|
| 257 | self.cfg.read(window.cfg_path) |
---|
| 258 | |
---|
| 259 | self.pos = self.get_intpair('geom', 'pos') or ( 0, 0) |
---|
| 260 | self.size = self.get_intpair('geom', 'size') or ( 500, 500) |
---|
| 261 | |
---|
| 262 | |
---|
| 263 | def save_config(self): |
---|
| 264 | ''' |
---|
| 265 | Save the current postion to the default config file. |
---|
| 266 | ''' |
---|
| 267 | self.cfg.set('geom', 'pos', '%d,%d' % self.pos) |
---|
| 268 | self.cfg.set('geom', 'size', '%d,%d' % self.size) |
---|
| 269 | try: |
---|
| 270 | f = open(window.cfg_path, 'w') |
---|
| 271 | self.cfg.write(f) |
---|
| 272 | f.close() |
---|
| 273 | except EnvironmentError, e: |
---|
| 274 | pass |
---|
| 275 | |
---|
| 276 | def read_proofs(self, fn): |
---|
| 277 | self.proofs = [] |
---|
| 278 | try: |
---|
| 279 | f = open(fn, 'r') |
---|
| 280 | creds = [] |
---|
| 281 | for line in f: |
---|
| 282 | line = line.strip() |
---|
| 283 | if line == '<proof>': |
---|
| 284 | prover = None |
---|
| 285 | principal = None |
---|
| 286 | role = None |
---|
| 287 | creds = [] |
---|
| 288 | elif line == '</proof>' : |
---|
| 289 | p = proof(name, prover, role, principal, creds) |
---|
| 290 | ok, pp = p.ctxt.query(role, principal) |
---|
| 291 | if not ok: self.proofs.append(p) |
---|
| 292 | |
---|
| 293 | m = re.match('<comment>(.*)</comment>', line) |
---|
| 294 | if m is not None: |
---|
| 295 | name = m.group(1) |
---|
| 296 | |
---|
| 297 | m = re.match('<principal>([0-9a-f]+)</principal>', line) |
---|
| 298 | if m is not None: |
---|
| 299 | principal = m.group(1) |
---|
| 300 | |
---|
| 301 | m = re.match('<prover>([0-9a-f]+)</prover>', line) |
---|
| 302 | if m is not None: |
---|
| 303 | prover = m.group(1) |
---|
| 304 | |
---|
| 305 | m = re.match('<attribute>(.*)</attribute>', line) |
---|
| 306 | if m is not None: |
---|
| 307 | role = m.group(1) |
---|
| 308 | |
---|
| 309 | m = re.match('<credential>(.*)</credential>', line) |
---|
| 310 | if m is not None: |
---|
| 311 | creds.append(base64.b64decode(m.group(1))) |
---|
| 312 | f.close() |
---|
| 313 | except EnvironmentError, e: |
---|
| 314 | self.report_error("Cannot open %s: %s" % (e.filename, e.strerror)) |
---|
| 315 | return |
---|
| 316 | |
---|
| 317 | def interpret_proof(self, p): |
---|
| 318 | roles = set() |
---|
| 319 | direct_roles = {} |
---|
| 320 | groles = set() |
---|
| 321 | principals = set() |
---|
| 322 | goals = set() |
---|
| 323 | attrs = set() |
---|
| 324 | ok, proof = p.ctxt.query(p.role, p.principal) |
---|
| 325 | for c in p.ctxt.credentials(): |
---|
| 326 | role = c.tail() |
---|
| 327 | if role.is_principal(): |
---|
| 328 | if role.string() != p.principal: |
---|
| 329 | principals.add(role.string()) |
---|
[af36abb] | 330 | else: |
---|
[39cd6e5] | 331 | assigner, r = c.head().string().split('.') |
---|
| 332 | direct_roles[r] = assigner |
---|
| 333 | else: |
---|
| 334 | r = role.string() |
---|
| 335 | for s in r.split('&'): |
---|
| 336 | roles.add(s.strip()) |
---|
| 337 | groles.add(r) |
---|
| 338 | |
---|
| 339 | role = c.head() |
---|
| 340 | roles.add(role.string()) |
---|
| 341 | groles.add(role.string()) |
---|
| 342 | |
---|
| 343 | for r in groles: |
---|
| 344 | ok, proof = p.ctxt.query(p.role, r) |
---|
| 345 | if ok : |
---|
| 346 | goals.add(r) |
---|
| 347 | for r in roles: |
---|
| 348 | ok, proof = p.ctxt.query(r, p.principal) |
---|
| 349 | if ok: |
---|
| 350 | attrs.add(r) |
---|
| 351 | |
---|
| 352 | |
---|
| 353 | split_goals = [ [s.strip() for s in g.split('&')] for g in goals ] |
---|
| 354 | plans = [] |
---|
| 355 | for sg in split_goals: |
---|
[08f776a] | 356 | pl = [] |
---|
[39cd6e5] | 357 | for g in sg: |
---|
| 358 | if g.count('.') == 2: |
---|
| 359 | # linking role |
---|
| 360 | pr, rr, lr = g.split('.') |
---|
| 361 | if lr in direct_roles: |
---|
[08f776a] | 362 | pl.append('add %s.%s to %s' % (pr, rr, direct_roles[lr])) |
---|
[39cd6e5] | 363 | else: |
---|
[08f776a] | 364 | pl.append('someone with %s.%s must delegate %s to %s' % \ |
---|
[39cd6e5] | 365 | (pr, rr, lr, p.principal)) |
---|
| 366 | elif g.count('.') == 1: |
---|
[08f776a] | 367 | pl.append('add %s to %s' % (g, principal)) |
---|
| 368 | plans.append('\n'.join(pl)) |
---|
[39cd6e5] | 369 | |
---|
| 370 | vb = gtk.VBox() |
---|
| 371 | vb.set_border_width(20) |
---|
[08f776a] | 372 | vb.pack_start( |
---|
| 373 | self.wrapit( |
---|
| 374 | self.makeListView([p.prover], "Entity Blocking Access") |
---|
| 375 | ), True, True,0) |
---|
[39cd6e5] | 376 | vb.pack_start( |
---|
| 377 | self.wrapit( |
---|
| 378 | self.makeListView(plans, "Suggested Actions") |
---|
| 379 | ), True, True,0) |
---|
| 380 | vb.pack_start( |
---|
| 381 | self.wrapit( |
---|
| 382 | self.makeListView(goals, "Required Slice Attributes") |
---|
| 383 | ), True, True,0) |
---|
| 384 | |
---|
| 385 | vb.pack_start( |
---|
| 386 | self.wrapit( |
---|
| 387 | self.makeListView(attrs, "Slice Attributes Present") |
---|
| 388 | ), True, True,0) |
---|
| 389 | vb.show_all() |
---|
| 390 | return vb |
---|
| 391 | |
---|
| 392 | w = window() |
---|
| 393 | gtk.main() |
---|