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(gz) Fix test failure on alpha by correcting format string for
 gc_chk_sha1_record (Martin [gz])

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bzrlib/gpg.py
1
 
# Copyright (C) 2005, 2011 Canonical Ltd
 
1
# Copyright (C) 2005 Canonical Ltd
2
2
#   Authors: Robert Collins <robert.collins@canonical.com>
3
3
#
4
4
# This program is free software; you can redistribute it and/or modify
19
19
 
20
20
import os
21
21
import sys
22
 
from StringIO import StringIO
23
22
 
24
23
from bzrlib.lazy_import import lazy_import
25
24
lazy_import(globals(), """
31
30
    trace,
32
31
    ui,
33
32
    )
34
 
from bzrlib.i18n import (
35
 
    gettext, 
36
 
    ngettext,
37
 
    )
38
33
""")
39
34
 
40
 
#verification results
41
 
SIGNATURE_VALID = 0
42
 
SIGNATURE_KEY_MISSING = 1
43
 
SIGNATURE_NOT_VALID = 2
44
 
SIGNATURE_NOT_SIGNED = 3
45
 
SIGNATURE_EXPIRED = 4
46
 
 
47
35
 
48
36
class DisabledGPGStrategy(object):
49
37
    """A GPG Strategy that makes everything fail."""
50
38
 
51
 
    @staticmethod
52
 
    def verify_signatures_available():
53
 
        return True
54
 
 
55
39
    def __init__(self, ignored):
56
40
        """Real strategies take a configuration."""
57
41
 
58
42
    def sign(self, content):
59
43
        raise errors.SigningFailed('Signing is disabled.')
60
44
 
61
 
    def verify(self, content, testament):
62
 
        raise errors.SignatureVerificationFailed('Signature verification is \
63
 
disabled.')
64
 
 
65
 
    def set_acceptable_keys(self, command_line_input):
66
 
        pass
67
 
 
68
45
 
69
46
class LoopbackGPGStrategy(object):
70
 
    """A GPG Strategy that acts like 'cat' - data is just passed through.
71
 
    Used in tests.
72
 
    """
73
 
 
74
 
    @staticmethod
75
 
    def verify_signatures_available():
76
 
        return True
 
47
    """A GPG Strategy that acts like 'cat' - data is just passed through."""
77
48
 
78
49
    def __init__(self, ignored):
79
50
        """Real strategies take a configuration."""
82
53
        return ("-----BEGIN PSEUDO-SIGNED CONTENT-----\n" + content +
83
54
                "-----END PSEUDO-SIGNED CONTENT-----\n")
84
55
 
85
 
    def verify(self, content, testament):
86
 
        return SIGNATURE_VALID, None
87
 
 
88
 
    def set_acceptable_keys(self, command_line_input):
89
 
        if command_line_input is not None:
90
 
            patterns = command_line_input.split(",")
91
 
            self.acceptable_keys = []
92
 
            for pattern in patterns:
93
 
                if pattern == "unknown":
94
 
                    pass
95
 
                else:
96
 
                    self.acceptable_keys.append(pattern)
97
 
 
98
 
    def do_verifications(self, revisions, repository):
99
 
        count = {SIGNATURE_VALID: 0,
100
 
                 SIGNATURE_KEY_MISSING: 0,
101
 
                 SIGNATURE_NOT_VALID: 0,
102
 
                 SIGNATURE_NOT_SIGNED: 0,
103
 
                 SIGNATURE_EXPIRED: 0}
104
 
        result = []
105
 
        all_verifiable = True
106
 
        for rev_id in revisions:
107
 
            verification_result, uid =\
108
 
                                repository.verify_revision(rev_id,self)
109
 
            result.append([rev_id, verification_result, uid])
110
 
            count[verification_result] += 1
111
 
            if verification_result != SIGNATURE_VALID:
112
 
                all_verifiable = False
113
 
        return (count, result, all_verifiable)
114
 
 
115
 
    def valid_commits_message(self, count):
116
 
        return gettext(u"{0} commits with valid signatures").format(
117
 
                                        count[SIGNATURE_VALID])            
118
 
 
119
 
    def unknown_key_message(self, count):
120
 
        return ngettext(u"{0} commit with unknown key",
121
 
                             u"{0} commits with unknown keys",
122
 
                             count[SIGNATURE_KEY_MISSING]).format(
123
 
                                        count[SIGNATURE_KEY_MISSING])
124
 
 
125
 
    def commit_not_valid_message(self, count):
126
 
        return ngettext(u"{0} commit not valid",
127
 
                             u"{0} commits not valid",
128
 
                             count[SIGNATURE_NOT_VALID]).format(
129
 
                                            count[SIGNATURE_NOT_VALID])
130
 
 
131
 
    def commit_not_signed_message(self, count):
132
 
        return ngettext(u"{0} commit not signed",
133
 
                             u"{0} commits not signed",
134
 
                             count[SIGNATURE_NOT_SIGNED]).format(
135
 
                                        count[SIGNATURE_NOT_SIGNED])
136
 
 
137
 
    def expired_commit_message(self, count):
138
 
        return ngettext(u"{0} commit with key now expired",
139
 
                        u"{0} commits with key now expired",
140
 
                        count[SIGNATURE_EXPIRED]).format(
141
 
                                        count[SIGNATURE_EXPIRED])
142
 
 
143
56
 
144
57
def _set_gpg_tty():
145
58
    tty = os.environ.get('TTY')
157
70
class GPGStrategy(object):
158
71
    """GPG Signing and checking facilities."""
159
72
 
160
 
    acceptable_keys = None
161
 
 
162
 
    @staticmethod
163
 
    def verify_signatures_available():
164
 
        """
165
 
        check if this strategy can verify signatures
166
 
 
167
 
        :return: boolean if this strategy can verify signatures
168
 
        """
169
 
        try:
170
 
            import gpgme
171
 
            return True
172
 
        except ImportError, error:
173
 
            return False
174
 
 
175
73
    def _command_line(self):
176
 
        
177
 
        return [self._config.gpg_signing_command(), '--clearsign', '-u',
178
 
                                                self._config.gpg_signing_key()]
 
74
        return [self._config.gpg_signing_command(), '--clearsign']
179
75
 
180
76
    def __init__(self, config):
181
77
        self._config = config
182
 
        try:
183
 
            import gpgme
184
 
            self.context = gpgme.Context()
185
 
        except ImportError, error:
186
 
            pass # can't use verify()
187
78
 
188
79
    def sign(self, content):
189
80
        if isinstance(content, unicode):
220
111
                raise errors.SigningFailed(self._command_line())
221
112
            else:
222
113
                raise
223
 
 
224
 
    def verify(self, content, testament):
225
 
        """Check content has a valid signature.
226
 
        
227
 
        :param content: the commit signature
228
 
        :param testament: the valid testament string for the commit
229
 
        
230
 
        :return: SIGNATURE_VALID or a failed SIGNATURE_ value, key uid if valid
231
 
        """
232
 
        try:
233
 
            import gpgme
234
 
        except ImportError, error:
235
 
            raise errors.GpgmeNotInstalled(error)
236
 
 
237
 
        signature = StringIO(content)
238
 
        plain_output = StringIO()
239
 
        
240
 
        try:
241
 
            result = self.context.verify(signature, None, plain_output)
242
 
        except gpgme.GpgmeError,error:
243
 
            raise errors.SignatureVerificationFailed(error[2])
244
 
 
245
 
        # No result if input is invalid.
246
 
        # test_verify_invalid()
247
 
        if len(result) == 0:
248
 
            return SIGNATURE_NOT_VALID, None
249
 
        # User has specified a list of acceptable keys, check our result is in it.
250
 
        # test_verify_unacceptable_key()
251
 
        fingerprint = result[0].fpr
252
 
        if self.acceptable_keys is not None:
253
 
            if not fingerprint in self.acceptable_keys:                
254
 
                return SIGNATURE_KEY_MISSING, fingerprint[-8:]
255
 
        # Check the signature actually matches the testament.
256
 
        # test_verify_bad_testament()
257
 
        if testament != plain_output.getvalue():
258
 
            return SIGNATURE_NOT_VALID, None 
259
 
        # Yay gpgme set the valid bit.
260
 
        # Can't write a test for this one as you can't set a key to be
261
 
        # trusted using gpgme.
262
 
        if result[0].summary & gpgme.SIGSUM_VALID:
263
 
            key = self.context.get_key(fingerprint)
264
 
            name = key.uids[0].name
265
 
            email = key.uids[0].email
266
 
            return SIGNATURE_VALID, name + " <" + email + ">"
267
 
        # Sigsum_red indicates a problem, unfortunatly I have not been able
268
 
        # to write any tests which actually set this.
269
 
        if result[0].summary & gpgme.SIGSUM_RED:
270
 
            return SIGNATURE_NOT_VALID, None
271
 
        # GPG does not know this key.
272
 
        # test_verify_unknown_key()
273
 
        if result[0].summary & gpgme.SIGSUM_KEY_MISSING:
274
 
            return SIGNATURE_KEY_MISSING, fingerprint[-8:]
275
 
        # Summary isn't set if sig is valid but key is untrusted
276
 
        # but if user has explicity set the key as acceptable we can validate it.
277
 
        if result[0].summary == 0 and self.acceptable_keys is not None:
278
 
            if fingerprint in self.acceptable_keys:
279
 
                # test_verify_untrusted_but_accepted()
280
 
                return SIGNATURE_VALID, None 
281
 
        # test_verify_valid_but_untrusted()
282
 
        if result[0].summary == 0 and self.acceptable_keys is None:
283
 
            return SIGNATURE_NOT_VALID, None
284
 
        if result[0].summary & gpgme.SIGSUM_KEY_EXPIRED:
285
 
            expires = self.context.get_key(result[0].fpr).subkeys[0].expires
286
 
            if expires > result[0].timestamp:
287
 
                # The expired key was not expired at time of signing.
288
 
                # test_verify_expired_but_valid()
289
 
                return SIGNATURE_EXPIRED, fingerprint[-8:]
290
 
            else:
291
 
                # I can't work out how to create a test where the signature
292
 
                # was expired at the time of signing.
293
 
                return SIGNATURE_NOT_VALID, None
294
 
        # A signature from a revoked key gets this.
295
 
        # test_verify_revoked_signature()
296
 
        if result[0].summary & gpgme.SIGSUM_SYS_ERROR:
297
 
            return SIGNATURE_NOT_VALID, None
298
 
        # Other error types such as revoked keys should (I think) be caught by
299
 
        # SIGSUM_RED so anything else means something is buggy.
300
 
        raise errors.SignatureVerificationFailed("Unknown GnuPG key "\
301
 
                                                 "verification result")
302
 
 
303
 
    def set_acceptable_keys(self, command_line_input):
304
 
        """sets the acceptable keys for verifying with this GPGStrategy
305
 
        
306
 
        :param command_line_input: comma separated list of patterns from
307
 
                                command line
308
 
        :return: nothing
309
 
        """
310
 
        key_patterns = None
311
 
        acceptable_keys_config = self._config.acceptable_keys()
312
 
        try:
313
 
            if isinstance(acceptable_keys_config, unicode):
314
 
                acceptable_keys_config = str(acceptable_keys_config)
315
 
        except UnicodeEncodeError:
316
 
            #gpg Context.keylist(pattern) does not like unicode
317
 
            raise errors.BzrCommandError(gettext('Only ASCII permitted in option names'))
318
 
 
319
 
        if acceptable_keys_config is not None:
320
 
            key_patterns = acceptable_keys_config
321
 
        if command_line_input is not None: #command line overrides config
322
 
            key_patterns = command_line_input
323
 
        if key_patterns is not None:
324
 
            patterns = key_patterns.split(",")
325
 
 
326
 
            self.acceptable_keys = []
327
 
            for pattern in patterns:
328
 
                result = self.context.keylist(pattern)
329
 
                found_key = False
330
 
                for key in result:
331
 
                    found_key = True
332
 
                    self.acceptable_keys.append(key.subkeys[0].fpr)
333
 
                    trace.mutter("Added acceptable key: " + key.subkeys[0].fpr)
334
 
                if not found_key:
335
 
                    trace.note(gettext(
336
 
                            "No GnuPG key results for pattern: {0}"
337
 
                                ).format(pattern))
338
 
 
339
 
    def do_verifications(self, revisions, repository,
340
 
                            process_events_callback=None):
341
 
        """do verifications on a set of revisions
342
 
        
343
 
        :param revisions: list of revision ids to verify
344
 
        :param repository: repository object
345
 
        :param process_events_callback: method to call for GUI frontends that
346
 
                                                want to keep their UI refreshed
347
 
        
348
 
        :return: count dictionary of results of each type,
349
 
                 result list for each revision,
350
 
                 boolean True if all results are verified successfully
351
 
        """
352
 
        count = {SIGNATURE_VALID: 0,
353
 
                 SIGNATURE_KEY_MISSING: 0,
354
 
                 SIGNATURE_NOT_VALID: 0,
355
 
                 SIGNATURE_NOT_SIGNED: 0,
356
 
                 SIGNATURE_EXPIRED: 0}
357
 
        result = []
358
 
        all_verifiable = True
359
 
        for rev_id in revisions:
360
 
            verification_result, uid =\
361
 
                                repository.verify_revision(rev_id,self)
362
 
            result.append([rev_id, verification_result, uid])
363
 
            count[verification_result] += 1
364
 
            if verification_result != SIGNATURE_VALID:
365
 
                all_verifiable = False
366
 
            if process_events_callback is not None:
367
 
                process_events_callback()
368
 
        return (count, result, all_verifiable)
369
 
 
370
 
    def verbose_valid_message(self, result):
371
 
        """takes a verify result and returns list of signed commits strings"""
372
 
        signers = {}
373
 
        for rev_id, validity, uid in result:
374
 
            if validity == SIGNATURE_VALID:
375
 
                signers.setdefault(uid, 0)
376
 
                signers[uid] += 1
377
 
        result = []
378
 
        for uid, number in signers.items():
379
 
             result.append( ngettext(u"{0} signed {1} commit", 
380
 
                             u"{0} signed {1} commits",
381
 
                             number).format(uid, number) )
382
 
        return result
383
 
 
384
 
 
385
 
    def verbose_not_valid_message(self, result, repo):
386
 
        """takes a verify result and returns list of not valid commit info"""
387
 
        signers = {}
388
 
        for rev_id, validity, empty in result:
389
 
            if validity == SIGNATURE_NOT_VALID:
390
 
                revision = repo.get_revision(rev_id)
391
 
                authors = ', '.join(revision.get_apparent_authors())
392
 
                signers.setdefault(authors, 0)
393
 
                signers[authors] += 1
394
 
        result = []
395
 
        for authors, number in signers.items():
396
 
            result.append( ngettext(u"{0} commit by author {1}", 
397
 
                                 u"{0} commits by author {1}",
398
 
                                 number).format(number, authors) )
399
 
        return result
400
 
 
401
 
    def verbose_not_signed_message(self, result, repo):
402
 
        """takes a verify result and returns list of not signed commit info"""
403
 
        signers = {}
404
 
        for rev_id, validity, empty in result:
405
 
            if validity == SIGNATURE_NOT_SIGNED:
406
 
                revision = repo.get_revision(rev_id)
407
 
                authors = ', '.join(revision.get_apparent_authors())
408
 
                signers.setdefault(authors, 0)
409
 
                signers[authors] += 1
410
 
        result = []
411
 
        for authors, number in signers.items():
412
 
            result.append( ngettext(u"{0} commit by author {1}", 
413
 
                                 u"{0} commits by author {1}",
414
 
                                 number).format(number, authors) )
415
 
        return result
416
 
 
417
 
    def verbose_missing_key_message(self, result):
418
 
        """takes a verify result and returns list of missing key info"""
419
 
        signers = {}
420
 
        for rev_id, validity, fingerprint in result:
421
 
            if validity == SIGNATURE_KEY_MISSING:
422
 
                signers.setdefault(fingerprint, 0)
423
 
                signers[fingerprint] += 1
424
 
        result = []
425
 
        for fingerprint, number in signers.items():
426
 
            result.append( ngettext(u"Unknown key {0} signed {1} commit", 
427
 
                                 u"Unknown key {0} signed {1} commits",
428
 
                                 number).format(fingerprint, number) )
429
 
        return result
430
 
 
431
 
    def verbose_expired_key_message(self, result, repo):
432
 
        """takes a verify result and returns list of expired key info"""
433
 
        signers = {}
434
 
        fingerprint_to_authors = {}
435
 
        for rev_id, validity, fingerprint in result:
436
 
            if validity == SIGNATURE_EXPIRED:
437
 
                revision = repo.get_revision(rev_id)
438
 
                authors = ', '.join(revision.get_apparent_authors())
439
 
                signers.setdefault(fingerprint, 0)
440
 
                signers[fingerprint] += 1
441
 
                fingerprint_to_authors[fingerprint] = authors
442
 
        result = []
443
 
        for fingerprint, number in signers.items():
444
 
            result.append(ngettext(u"{0} commit by author {1} with "\
445
 
                                    "key {2} now expired", 
446
 
                                   u"{0} commits by author {1} with key {2} now "\
447
 
                                    "expired",
448
 
                                    number).format(number,
449
 
                            fingerprint_to_authors[fingerprint], fingerprint) )
450
 
        return result
451
 
 
452
 
    def valid_commits_message(self, count):
453
 
        """returns message for number of commits"""
454
 
        return gettext(u"{0} commits with valid signatures").format(
455
 
                                        count[SIGNATURE_VALID])
456
 
 
457
 
    def unknown_key_message(self, count):
458
 
        """returns message for number of commits"""
459
 
        return ngettext(u"{0} commit with unknown key",
460
 
                        u"{0} commits with unknown keys",
461
 
                        count[SIGNATURE_KEY_MISSING]).format(
462
 
                                        count[SIGNATURE_KEY_MISSING])
463
 
 
464
 
    def commit_not_valid_message(self, count):
465
 
        """returns message for number of commits"""
466
 
        return ngettext(u"{0} commit not valid",
467
 
                        u"{0} commits not valid",
468
 
                        count[SIGNATURE_NOT_VALID]).format(
469
 
                                            count[SIGNATURE_NOT_VALID])
470
 
 
471
 
    def commit_not_signed_message(self, count):
472
 
        """returns message for number of commits"""
473
 
        return ngettext(u"{0} commit not signed",
474
 
                        u"{0} commits not signed",
475
 
                        count[SIGNATURE_NOT_SIGNED]).format(
476
 
                                        count[SIGNATURE_NOT_SIGNED])
477
 
 
478
 
    def expired_commit_message(self, count):
479
 
        """returns message for number of commits"""
480
 
        return ngettext(u"{0} commit with key now expired",
481
 
                        u"{0} commits with key now expired",
482
 
                        count[SIGNATURE_EXPIRED]).format(
483
 
                                    count[SIGNATURE_EXPIRED])