Commit | Line | Data |
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060ca767 | 1 | #! @PYTHON@ |
2 | # -*-python-*- | |
3 | ||
4 | ### External dependencies | |
5 | ||
6 | import catacomb as C | |
7 | import os as OS | |
8 | import sys as SYS | |
9 | import sre as RX | |
10 | import getopt as O | |
c77687d5 | 11 | import shutil as SH |
12 | import filecmp as FC | |
060ca767 | 13 | from cStringIO import StringIO |
14 | from errno import * | |
15 | from stat import * | |
16 | ||
17 | ### Useful regular expressions | |
18 | ||
c77687d5 | 19 | rx_comment = RX.compile(r'^\s*(#|$)') |
20 | rx_keyval = RX.compile(r'^\s*([-\w]+)(?:\s+(?!=)|\s*=\s*)(|\S|\S.*\S)\s*$') | |
21 | rx_dollarsubst = RX.compile(r'\$\{([-\w]+)\}') | |
22 | rx_atsubst = RX.compile(r'@([-\w]+)@') | |
23 | rx_nonalpha = RX.compile(r'\W') | |
24 | rx_seq = RX.compile(r'\<SEQ\>') | |
060ca767 | 25 | |
26 | ### Utility functions | |
27 | ||
28 | class SubprocessError (Exception): pass | |
29 | class VerifyError (Exception): pass | |
30 | ||
31 | quis = OS.path.basename(SYS.argv[0]) | |
32 | PACKAGE = "@PACKAGE@" | |
33 | VERSION = "@VERSION@" | |
34 | ||
35 | def moan(msg): | |
36 | SYS.stderr.write('%s: %s\n' % (quis, msg)) | |
37 | ||
38 | def die(msg, rc = 1): | |
39 | moan(msg) | |
40 | SYS.exit(rc) | |
41 | ||
42 | def subst(s, rx, map): | |
43 | out = StringIO() | |
44 | i = 0 | |
45 | for m in rx.finditer(s): | |
46 | out.write(s[i:m.start()] + map[m.group(1)]) | |
47 | i = m.end() | |
48 | out.write(s[i:]) | |
49 | return out.getvalue() | |
50 | ||
51 | def rmtree(path): | |
52 | try: | |
c77687d5 | 53 | st = OS.lstat(path) |
060ca767 | 54 | except OSError, err: |
55 | if err.errno == ENOENT: | |
56 | return | |
57 | raise | |
58 | if not S_ISDIR(st.st_mode): | |
59 | OS.unlink(path) | |
60 | else: | |
61 | cwd = OS.getcwd() | |
62 | try: | |
63 | OS.chdir(path) | |
64 | for i in OS.listdir('.'): | |
65 | rmtree(i) | |
66 | finally: | |
67 | OS.chdir(cwd) | |
68 | OS.rmdir(path) | |
69 | ||
70 | def zap(file): | |
71 | try: | |
72 | OS.unlink(file) | |
73 | except OSError, err: | |
74 | if err.errno == ENOENT: return | |
75 | raise | |
76 | ||
77 | def run(args): | |
78 | args = map(conf_subst, args.split()) | |
79 | nargs = [] | |
80 | for a in args: | |
81 | if len(a) > 0 and a[0] != '!': | |
82 | nargs += [a] | |
83 | else: | |
84 | nargs += a[1:].split() | |
85 | args = nargs | |
86 | print '+ %s' % ' '.join(args) | |
87 | rc = OS.spawnvp(OS.P_WAIT, args[0], args) | |
88 | if rc != 0: | |
89 | raise SubprocessError, rc | |
90 | ||
91 | def hexhyphens(bytes): | |
92 | out = StringIO() | |
93 | for i in xrange(0, len(bytes)): | |
94 | if i > 0 and i % 4 == 0: out.write('-') | |
95 | out.write('%02x' % ord(bytes[i])) | |
96 | return out.getvalue() | |
97 | ||
98 | def fingerprint(kf, ktag): | |
99 | h = C.gchashes[conf['fingerprint-hash']]() | |
100 | k = C.KeyFile(kf)[ktag].fingerprint(h, '-secret') | |
101 | return h.done() | |
102 | ||
103 | ### Read configuration | |
104 | ||
105 | class ConfigFileError (Exception): pass | |
106 | conf = {} | |
107 | ||
c77687d5 | 108 | def conf_subst(s): return subst(s, rx_dollarsubst, conf) |
060ca767 | 109 | |
110 | ## Read the file | |
111 | def conf_read(f): | |
112 | lno = 0 | |
113 | for line in file(f): | |
114 | lno += 1 | |
c77687d5 | 115 | if rx_comment.match(line): continue |
060ca767 | 116 | if line[-1] == '\n': line = line[:-1] |
c77687d5 | 117 | match = rx_keyval.match(line) |
060ca767 | 118 | if not match: |
119 | raise ConfigFileError, "%s:%d: bad line `%s'" % (f, lno, line) | |
120 | k, v = match.groups() | |
121 | conf[k] = conf_subst(v) | |
122 | ||
123 | ## Sift the wreckage | |
124 | def conf_defaults(): | |
c77687d5 | 125 | for k, v in [('repos-base', 'tripe-keys.tar.gz'), |
126 | ('sig-base', 'tripe-keys.sig-<SEQ>'), | |
127 | ('repos-url', '${base-url}${repos-base}'), | |
128 | ('sig-url', '${base-url}${sig-base}'), | |
129 | ('sig-file', '${base-dir}${sig-base}'), | |
130 | ('repos-file', '${base-dir}${repos-base}'), | |
060ca767 | 131 | ('conf-file', '${base-dir}tripe-keys.conf'), |
132 | ('kx', 'dh'), | |
133 | ('kx-param', lambda: {'dh': '-LS -b2048 -B256', | |
134 | 'ec': '-Cnist-p256'}[conf['kx']]), | |
135 | ('kx-expire', 'now + 1 year'), | |
136 | ('cipher', 'blowfish-cbc'), | |
137 | ('hash', 'sha256'), | |
138 | ('mgf', '${hash}-mgf'), | |
139 | ('mac', lambda: '%s-hmac/%d' % | |
140 | (conf['hash'], | |
141 | C.gchashes[conf['hash']].hashsz * 4)), | |
142 | ('sig', lambda: {'dh': 'dsa', 'ec': 'ecdsa'}[conf['kx']]), | |
143 | ('sig-fresh', 'always'), | |
144 | ('sig-genalg', lambda: {'kcdsa': 'dh', | |
145 | 'dsa': 'dsa', | |
146 | 'rsapkcs1': 'rsa', | |
147 | 'rsapss': 'rsa', | |
148 | 'ecdsa': 'ec', | |
149 | 'eckcdsa': 'ec'}[conf['sig']]), | |
150 | ('sig-param', lambda: {'dh': '-LS -b2048 -B256', | |
151 | 'dsa': '-b2048 -B256', | |
152 | 'ec': '-Cnist-p256', | |
153 | 'rsa': '-b2048'}[conf['sig-genalg']]), | |
154 | ('sig-hash', '${hash}'), | |
155 | ('sig-expire', 'forever'), | |
156 | ('fingerprint-hash', '${hash}')]: | |
157 | try: | |
158 | if k in conf: continue | |
159 | if type(v) == str: | |
160 | conf[k] = conf_subst(v) | |
161 | else: | |
162 | conf[k] = v() | |
163 | except KeyError, exc: | |
164 | if len(exc.args) == 0: raise | |
165 | conf[k] = '<missing-var %s>' % exc.args[0] | |
166 | ||
167 | ### Commands | |
168 | ||
169 | def version(fp = SYS.stdout): | |
170 | fp.write('%s, %s version %s\n' % (quis, PACKAGE, VERSION)) | |
171 | ||
172 | def usage(fp): | |
173 | fp.write('Usage: %s SUBCOMMAND [ARGS...]\n' % quis) | |
174 | ||
175 | def cmd_help(args): | |
176 | if len(args) == 0: | |
177 | version(SYS.stdout) | |
178 | ||
179 | usage(SYS.stdout) | |
180 | print """ | |
181 | Key management utility for TrIPE. | |
182 | ||
183 | Options supported: | |
184 | ||
e04c2d50 MW |
185 | -h, --help Show this help message. |
186 | -v, --version Show the version number. | |
187 | -u, --usage Show pointlessly short usage string. | |
060ca767 | 188 | |
189 | Subcommands available: | |
190 | """ | |
191 | args = commands.keys() | |
192 | args.sort() | |
193 | for c in args: | |
194 | func, min, max, help = commands[c] | |
195 | print '%s %s' % (c, help) | |
196 | ||
c77687d5 | 197 | def master_keys(): |
198 | if not OS.path.exists('master'): | |
199 | return | |
200 | for k in C.KeyFile('master'): | |
201 | if (k.type != 'tripe-keys-master' or | |
202 | k.expiredp or | |
203 | not k.tag.startswith('master-')): | |
204 | continue #?? | |
205 | yield k | |
206 | def master_sequence(k): | |
207 | return int(k.tag[7:]) | |
208 | def max_master_sequence(): | |
209 | seq = -1 | |
210 | for k in master_keys(): | |
211 | q = master_sequence(k) | |
212 | if q > seq: seq = q | |
213 | return seq | |
214 | def seqsubst(x, q): | |
215 | return rx_seq.sub(str(q), conf[x]) | |
216 | ||
217 | def cmd_newmaster(args): | |
218 | seq = max_master_sequence() + 1 | |
060ca767 | 219 | run('''key -kmaster add |
220 | -a${sig-genalg} !${sig-param} | |
c77687d5 | 221 | -e${sig-expire} -l -tmaster-%d tripe-keys-master |
222 | sig=${sig} hash=${sig-hash}''' % seq) | |
223 | run('key -kmaster extract -f-secret repos/master.pub') | |
060ca767 | 224 | |
c77687d5 | 225 | def cmd_setup(args): |
226 | OS.mkdir('repos') | |
060ca767 | 227 | run('''key -krepos/param add |
228 | -a${kx}-param !${kx-param} | |
229 | -eforever -tparam tripe-${kx}-param | |
230 | cipher=${cipher} hash=${hash} mac=${mac} mgf=${mgf}''') | |
c77687d5 | 231 | cmd_newmaster(args) |
060ca767 | 232 | |
233 | def cmd_upload(args): | |
234 | ||
235 | ## Sanitize the repository directory | |
236 | umask = OS.umask(0); OS.umask(umask) | |
237 | mode = 0666 & ~umask | |
238 | for f in OS.listdir('repos'): | |
239 | ff = OS.path.join('repos', f) | |
c77687d5 | 240 | if (f.startswith('master') or f.startswith('peer-')) \ |
241 | and f.endswith('.old'): | |
060ca767 | 242 | OS.unlink(ff) |
243 | continue | |
c77687d5 | 244 | OS.chmod(ff, mode) |
245 | ||
246 | rmtree('tmp') | |
247 | OS.mkdir('tmp') | |
248 | OS.symlink('../repos', 'tmp/repos') | |
249 | cwd = OS.getcwd() | |
250 | try: | |
251 | ||
252 | ## Build the configuration file | |
253 | seq = max_master_sequence() | |
254 | v = {'MASTER-SEQUENCE': str(seq), | |
255 | 'HK-MASTER': hexhyphens(fingerprint('repos/master.pub', | |
256 | 'master-%d' % seq))} | |
257 | fin = file('tripe-keys.master') | |
258 | fout = file('tmp/tripe-keys.conf', 'w') | |
259 | for line in fin: | |
260 | fout.write(subst(line, rx_atsubst, v)) | |
261 | fin.close(); fout.close() | |
262 | SH.copyfile('tmp/tripe-keys.conf', conf_subst('${conf-file}.new')) | |
263 | commit = [conf['repos-file'], conf['conf-file']] | |
264 | ||
265 | ## Make and sign the repository archive | |
266 | OS.chdir('tmp') | |
267 | run('tar chozf ${repos-file}.new .') | |
268 | OS.chdir(cwd) | |
269 | for k in master_keys(): | |
270 | seq = master_sequence(k) | |
271 | sigfile = seqsubst('sig-file', seq) | |
272 | run('''catsign -kmaster sign -abdC -kmaster-%d | |
273 | -o%s.new ${repos-file}.new''' % (seq, sigfile)) | |
274 | commit.append(sigfile) | |
275 | ||
276 | ## Commit the changes | |
277 | for base in commit: | |
278 | new = '%s.new' % base | |
279 | OS.rename(new, base) | |
280 | finally: | |
281 | OS.chdir(cwd) | |
e04c2d50 | 282 | rmtree('tmp') |
060ca767 | 283 | |
284 | def cmd_update(args): | |
285 | cwd = OS.getcwd() | |
286 | rmtree('tmp') | |
287 | try: | |
288 | ||
289 | ## Fetch a new distribution | |
290 | OS.mkdir('tmp') | |
291 | OS.chdir('tmp') | |
c77687d5 | 292 | seq = int(conf['master-sequence']) |
162fcf48 MW |
293 | run('curl -s -o tripe-keys.tar.gz ${repos-url}') |
294 | run('curl -s -o tripe-keys.sig %s' % seqsubst('sig-url', seq)) | |
060ca767 | 295 | run('tar xfz tripe-keys.tar.gz') |
296 | ||
297 | ## Verify the signature | |
c77687d5 | 298 | want = C.bytes(rx_nonalpha.sub('', conf['hk-master'])) |
299 | got = fingerprint('repos/master.pub', 'master-%d' % seq) | |
060ca767 | 300 | if want != got: raise VerifyError |
c77687d5 | 301 | run('''catsign -krepos/master.pub verify -avC -kmaster-%d |
302 | -t${sig-fresh} tripe-keys.sig tripe-keys.tar.gz''' % seq) | |
060ca767 | 303 | |
304 | ## OK: update our copy | |
305 | OS.chdir(cwd) | |
306 | if OS.path.exists('repos'): OS.rename('repos', 'repos.old') | |
307 | OS.rename('tmp/repos', 'repos') | |
c77687d5 | 308 | if not FC.cmp('tmp/tripe-keys.conf', 'tripe-keys.conf'): |
309 | moan('configuration file changed: recommend running another update') | |
310 | OS.rename('tmp/tripe-keys.conf', 'tripe-keys.conf') | |
060ca767 | 311 | rmtree('repos.old') |
312 | ||
313 | finally: | |
314 | OS.chdir(cwd) | |
315 | rmtree('tmp') | |
316 | cmd_rebuild(args) | |
317 | ||
318 | def cmd_rebuild(args): | |
319 | zap('keyring.pub') | |
320 | for i in OS.listdir('repos'): | |
321 | if i.startswith('peer-') and i.endswith('.pub'): | |
322 | run('key -kkeyring.pub merge %s' % OS.path.join('repos', i)) | |
323 | ||
324 | def cmd_generate(args): | |
325 | tag, = args | |
326 | keyring_pub = 'peer-%s.pub' % tag | |
327 | zap('keyring'); zap(keyring_pub) | |
328 | run('key -kkeyring merge repos/param') | |
329 | run('key -kkeyring add -a${kx} -pparam -e${kx-expire} -t%s tripe-${kx}' % | |
c77687d5 | 330 | tag) |
ca6eb20c | 331 | run('key -kkeyring extract -f-secret %s %s' % (keyring_pub, tag)) |
060ca767 | 332 | |
333 | def cmd_clean(args): | |
334 | rmtree('repos') | |
335 | rmtree('tmp') | |
c77687d5 | 336 | for i in OS.listdir('.'): |
337 | r = i | |
338 | if r.endswith('.old'): r = r[:-4] | |
339 | if (r == 'master' or r == 'param' or | |
340 | r == 'keyring' or r == 'keyring.pub' or r.startswith('peer-')): | |
341 | zap(i) | |
060ca767 | 342 | |
343 | ### Main driver | |
344 | ||
345 | class UsageError (Exception): pass | |
e04c2d50 | 346 | |
060ca767 | 347 | commands = {'help': (cmd_help, 0, 1, ''), |
c77687d5 | 348 | 'newmaster': (cmd_newmaster, 0, 0, ''), |
060ca767 | 349 | 'setup': (cmd_setup, 0, 0, ''), |
350 | 'upload': (cmd_upload, 0, 0, ''), | |
351 | 'update': (cmd_update, 0, 0, ''), | |
352 | 'clean': (cmd_clean, 0, 0, ''), | |
353 | 'generate': (cmd_generate, 1, 1, 'TAG'), | |
354 | 'rebuild': (cmd_rebuild, 0, 0, '')} | |
355 | ||
356 | def init(): | |
357 | for f in ['tripe-keys.master', 'tripe-keys.conf']: | |
358 | if OS.path.exists(f): | |
359 | conf_read(f) | |
360 | break | |
361 | conf_defaults() | |
362 | def main(argv): | |
363 | try: | |
364 | opts, args = O.getopt(argv[1:], 'hvu', | |
365 | ['help', 'version', 'usage']) | |
366 | except O.GetoptError, exc: | |
367 | moan(exc) | |
368 | usage(SYS.stderr) | |
369 | SYS.exit(1) | |
370 | for o, v in opts: | |
371 | if o in ('-h', '--help'): | |
372 | cmd_help([]) | |
373 | SYS.exit(0) | |
374 | elif o in ('-v', '--version'): | |
375 | version(SYS.stdout) | |
376 | SYS.exit(0) | |
377 | elif o in ('-u', '--usage'): | |
378 | usage(SYS.stdout) | |
379 | SYS.exit(0) | |
380 | if len(argv) < 2: | |
381 | cmd_help([]) | |
382 | else: | |
383 | c = argv[1] | |
384 | func, min, max, help = commands[c] | |
385 | args = argv[2:] | |
386 | if len(args) < min or (max > 0 and len(args) > max): | |
387 | raise UsageError, (c, help) | |
388 | func(args) | |
389 | ||
390 | init() | |
391 | main(SYS.argv) |