python/qemu: make 'args' style arguments immutable
[qemu.git] / tests / qemu-iotests / 149
blob852768f80a1c95a68984bd82d91688a413714d92
1 #!/usr/bin/env python3
3 # Copyright (C) 2016 Red Hat, Inc.
5 # This program is free software; you can redistribute it and/or modify
6 # it under the terms of the GNU General Public License as published by
7 # the Free Software Foundation; either version 2 of the License, or
8 # (at your option) any later version.
10 # This program is distributed in the hope that it will be useful,
11 # but WITHOUT ANY WARRANTY; without even the implied warranty of
12 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
13 # GNU General Public License for more details.
15 # You should have received a copy of the GNU General Public License
16 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
18 # Creator/Owner: Daniel P. Berrange <berrange@redhat.com>
20 # Exercise the QEMU 'luks' block driver to validate interoperability
21 # with the Linux dm-crypt + cryptsetup implementation
23 import subprocess
24 import os
25 import os.path
27 import base64
29 import iotests
32 class LUKSConfig(object):
33     """Represent configuration parameters for a single LUKS
34        setup to be tested"""
36     def __init__(self, name, cipher, keylen, mode, ivgen,
37                  ivgen_hash, hash, password=None, passwords=None):
39         self.name = name
40         self.cipher = cipher
41         self.keylen = keylen
42         self.mode = mode
43         self.ivgen = ivgen
44         self.ivgen_hash = ivgen_hash
45         self.hash = hash
47         if passwords is not None:
48             self.passwords = passwords
49         else:
50             self.passwords = {}
52             if password is None:
53                 self.passwords["0"] = "123456"
54             else:
55                 self.passwords["0"] = password
57     def __repr__(self):
58         return self.name
60     def image_name(self):
61         return "luks-%s.img" % self.name
63     def image_path(self):
64         return os.path.join(iotests.test_dir, self.image_name())
66     def device_name(self):
67         return "qiotest-145-%s" % self.name
69     def device_path(self):
70         return "/dev/mapper/" + self.device_name()
72     def first_password(self):
73         for i in range(8):
74             slot = str(i)
75             if slot in self.passwords:
76                 return (self.passwords[slot], slot)
77         raise Exception("No password found")
79     def first_password_base64(self):
80         (pw, slot) = self.first_password()
81         return base64.b64encode(pw.encode('ascii')).decode('ascii')
83     def active_slots(self):
84         slots = []
85         for i in range(8):
86             slot = str(i)
87             if slot in self.passwords:
88                 slots.append(slot)
89         return slots
91 def verify_passwordless_sudo():
92     """Check whether sudo is configured to allow
93        password-less access to commands"""
95     args = ["sudo", "-n", "/bin/true"]
97     proc = subprocess.Popen(args,
98                             stdin=subprocess.PIPE,
99                             stdout=subprocess.PIPE,
100                             stderr=subprocess.STDOUT,
101                             universal_newlines=True)
103     msg = proc.communicate()[0]
105     if proc.returncode != 0:
106         iotests.notrun('requires password-less sudo access: %s' % msg)
109 def cryptsetup(args, password=None):
110     """Run the cryptsetup command in batch mode"""
112     fullargs = ["sudo", "cryptsetup", "-q", "-v"]
113     fullargs.extend(args)
115     iotests.log(" ".join(fullargs), filters=[iotests.filter_test_dir])
116     proc = subprocess.Popen(fullargs,
117                             stdin=subprocess.PIPE,
118                             stdout=subprocess.PIPE,
119                             stderr=subprocess.STDOUT,
120                             universal_newlines=True)
122     msg = proc.communicate(password)[0]
124     if proc.returncode != 0:
125         raise Exception(msg)
128 def cryptsetup_add_password(config, slot):
129     """Add another password to a LUKS key slot"""
131     (password, mainslot) = config.first_password()
133     pwfile = os.path.join(iotests.test_dir, "passwd.txt")
134     with open(pwfile, "w") as fh:
135         fh.write(config.passwords[slot])
137     try:
138         args = ["luksAddKey", config.image_path(),
139                 "--key-slot", slot,
140                 "--key-file", "-",
141                 "--iter-time", "10",
142                 pwfile]
144         cryptsetup(args, password)
145     finally:
146         os.unlink(pwfile)
149 def cryptsetup_format(config):
150     """Format a new LUKS volume with cryptsetup, adding the
151     first key slot only"""
153     (password, slot) = config.first_password()
155     args = ["luksFormat", "--type", "luks1"]
156     cipher = config.cipher + "-" + config.mode + "-" + config.ivgen
157     if config.ivgen_hash is not None:
158         cipher = cipher + ":" + config.ivgen_hash
159     elif config.ivgen == "essiv":
160         cipher = cipher + ":" + "sha256"
161     args.extend(["--cipher", cipher])
162     if config.mode == "xts":
163         args.extend(["--key-size", str(config.keylen * 2)])
164     else:
165         args.extend(["--key-size", str(config.keylen)])
166     if config.hash is not None:
167         args.extend(["--hash", config.hash])
168     args.extend(["--key-slot", slot])
169     args.extend(["--key-file", "-"])
170     args.extend(["--iter-time", "10"])
171     args.append(config.image_path())
173     cryptsetup(args, password)
176 def chown(config):
177     """Set the ownership of a open LUKS device to this user"""
179     path = config.device_path()
181     args = ["sudo", "chown", "%d:%d" % (os.getuid(), os.getgid()), path]
182     iotests.log(" ".join(args), filters=[iotests.filter_chown])
183     proc = subprocess.Popen(args,
184                             stdin=subprocess.PIPE,
185                             stdout=subprocess.PIPE,
186                             stderr=subprocess.STDOUT)
188     msg = proc.communicate()[0]
190     if proc.returncode != 0:
191         raise Exception(msg)
194 def cryptsetup_open(config):
195     """Open an image as a LUKS device"""
197     (password, slot) = config.first_password()
199     args = ["luksOpen", config.image_path(), config.device_name()]
201     cryptsetup(args, password)
204 def cryptsetup_close(config):
205     """Close an active LUKS device """
207     args = ["luksClose", config.device_name()]
208     cryptsetup(args)
211 def delete_image(config):
212     """Delete a disk image"""
214     try:
215         os.unlink(config.image_path())
216         iotests.log("unlink %s" % config.image_path(),
217                     filters=[iotests.filter_test_dir])
218     except Exception as e:
219         pass
222 def create_image(config, size_mb):
223     """Create a bare disk image with requested size"""
225     delete_image(config)
226     iotests.log("truncate %s --size %dMB" % (config.image_path(), size_mb),
227                 filters=[iotests.filter_test_dir])
228     with open(config.image_path(), "w") as fn:
229         fn.truncate(size_mb * 1024 * 1024)
232 def qemu_img_create(config, size_mb):
233     """Create and format a disk image with LUKS using qemu-img"""
235     opts = [
236         "key-secret=sec0",
237         "iter-time=10",
238         "cipher-alg=%s-%d" % (config.cipher, config.keylen),
239         "cipher-mode=%s" % config.mode,
240         "ivgen-alg=%s" % config.ivgen,
241         "hash-alg=%s" % config.hash,
242     ]
243     if config.ivgen_hash is not None:
244         opts.append("ivgen-hash-alg=%s" % config.ivgen_hash)
246     args = ["create", "-f", "luks",
247             "--object",
248             ("secret,id=sec0,data=%s,format=base64" %
249              config.first_password_base64()),
250             "-o", ",".join(opts),
251             config.image_path(),
252             "%dM" % size_mb]
254     iotests.log("qemu-img " + " ".join(args), filters=[iotests.filter_test_dir])
255     iotests.log(iotests.qemu_img_pipe(*args), filters=[iotests.filter_test_dir])
257 def qemu_io_image_args(config, dev=False):
258     """Get the args for access an image or device with qemu-io"""
260     if dev:
261         return [
262             "--image-opts",
263             "driver=host_device,filename=%s" % config.device_path()]
264     else:
265         return [
266             "--object",
267             ("secret,id=sec0,data=%s,format=base64" %
268              config.first_password_base64()),
269             "--image-opts",
270             ("driver=luks,key-secret=sec0,file.filename=%s" %
271              config.image_path())]
273 def qemu_io_write_pattern(config, pattern, offset_mb, size_mb, dev=False):
274     """Write a pattern of data to a LUKS image or device"""
276     if dev:
277         chown(config)
278     args = ["-c", "write -P 0x%x %dM %dM" % (pattern, offset_mb, size_mb)]
279     args.extend(qemu_io_image_args(config, dev))
280     iotests.log("qemu-io " + " ".join(args), filters=[iotests.filter_test_dir])
281     iotests.log(iotests.qemu_io(*args), filters=[iotests.filter_test_dir,
282                                                  iotests.filter_qemu_io])
285 def qemu_io_read_pattern(config, pattern, offset_mb, size_mb, dev=False):
286     """Read a pattern of data to a LUKS image or device"""
288     if dev:
289         chown(config)
290     args = ["-c", "read -P 0x%x %dM %dM" % (pattern, offset_mb, size_mb)]
291     args.extend(qemu_io_image_args(config, dev))
292     iotests.log("qemu-io " + " ".join(args), filters=[iotests.filter_test_dir])
293     iotests.log(iotests.qemu_io(*args), filters=[iotests.filter_test_dir,
294                                                  iotests.filter_qemu_io])
297 def test_once(config, qemu_img=False):
298     """Run the test with a desired LUKS configuration. Can either
299        use qemu-img for creating the initial volume, or cryptsetup,
300        in order to test interoperability in both directions"""
302     iotests.log("# ================= %s %s =================" % (
303         "qemu-img" if qemu_img else "dm-crypt", config))
305     oneKB = 1024
306     oneMB = oneKB * 1024
307     oneGB = oneMB * 1024
308     oneTB = oneGB * 1024
310     # 4 TB, so that we pass the 32-bit sector number boundary.
311     # Important for testing correctness of some IV generators
312     # The files are sparse, so not actually using this much space
313     image_size = 4 * oneTB
314     if qemu_img:
315         iotests.log("# Create image")
316         qemu_img_create(config, image_size // oneMB)
317     else:
318         iotests.log("# Create image")
319         create_image(config, image_size // oneMB)
321     lowOffsetMB = 100
322     highOffsetMB = 3 * oneTB // oneMB
324     try:
325         if not qemu_img:
326             iotests.log("# Format image")
327             cryptsetup_format(config)
329             for slot in config.active_slots()[1:]:
330                 iotests.log("# Add password slot %s" % slot)
331                 cryptsetup_add_password(config, slot)
333         # First we'll open the image using cryptsetup and write a
334         # known pattern of data that we'll then verify with QEMU
336         iotests.log("# Open dev")
337         cryptsetup_open(config)
339         try:
340             iotests.log("# Write test pattern 0xa7")
341             qemu_io_write_pattern(config, 0xa7, lowOffsetMB, 10, dev=True)
342             iotests.log("# Write test pattern 0x13")
343             qemu_io_write_pattern(config, 0x13, highOffsetMB, 10, dev=True)
344         finally:
345             iotests.log("# Close dev")
346             cryptsetup_close(config)
348         # Ok, now we're using QEMU to verify the pattern just
349         # written via dm-crypt
351         iotests.log("# Read test pattern 0xa7")
352         qemu_io_read_pattern(config, 0xa7, lowOffsetMB, 10, dev=False)
353         iotests.log("# Read test pattern 0x13")
354         qemu_io_read_pattern(config, 0x13, highOffsetMB, 10, dev=False)
357         # Write a new pattern to the image, which we'll later
358         # verify with dm-crypt
359         iotests.log("# Write test pattern 0x91")
360         qemu_io_write_pattern(config, 0x91, lowOffsetMB, 10, dev=False)
361         iotests.log("# Write test pattern 0x5e")
362         qemu_io_write_pattern(config, 0x5e, highOffsetMB, 10, dev=False)
365         # Now we're opening the image with dm-crypt once more
366         # and verifying what QEMU wrote, completing the circle
367         iotests.log("# Open dev")
368         cryptsetup_open(config)
370         try:
371             iotests.log("# Read test pattern 0x91")
372             qemu_io_read_pattern(config, 0x91, lowOffsetMB, 10, dev=True)
373             iotests.log("# Read test pattern 0x5e")
374             qemu_io_read_pattern(config, 0x5e, highOffsetMB, 10, dev=True)
375         finally:
376             iotests.log("# Close dev")
377             cryptsetup_close(config)
378     finally:
379         iotests.log("# Delete image")
380         delete_image(config)
381         print()
384 # Obviously we only work with the luks image format
385 iotests.script_initialize(supported_fmts=['luks'])
387 # We need sudo in order to run cryptsetup to create
388 # dm-crypt devices. This is safe to use on any
389 # machine, since all dm-crypt devices are backed
390 # by newly created plain files, and have a dm-crypt
391 # name prefix of 'qiotest' to avoid clashing with
392 # user LUKS volumes
393 verify_passwordless_sudo()
396 # If we look at all permutations of cipher, key size,
397 # mode, ivgen, hash, there are ~1000 possible configs.
399 # We certainly don't want/need to test every permutation
400 # to get good validation of interoperability between QEMU
401 # and dm-crypt/cryptsetup.
403 # The configs below are a representative set that aim to
404 # exercise each axis of configurability.
406 configs = [
407     # A common LUKS default
408     LUKSConfig("aes-256-xts-plain64-sha1",
409                "aes", 256, "xts", "plain64", None, "sha1"),
412     # LUKS default but diff ciphers
413     LUKSConfig("twofish-256-xts-plain64-sha1",
414                "twofish", 256, "xts", "plain64", None, "sha1"),
415     LUKSConfig("serpent-256-xts-plain64-sha1",
416                "serpent", 256, "xts", "plain64", None, "sha1"),
417     # Should really be xts, but kernel doesn't support xts+cast5
418     # nor does it do essiv+cast5
419     LUKSConfig("cast5-128-cbc-plain64-sha1",
420                "cast5", 128, "cbc", "plain64", None, "sha1"),
421     LUKSConfig("cast6-256-xts-plain64-sha1",
422                "cast6", 256, "xts", "plain64", None, "sha1"),
425     # LUKS default but diff modes / ivgens
426     LUKSConfig("aes-256-cbc-plain-sha1",
427                "aes", 256, "cbc", "plain", None, "sha1"),
428     LUKSConfig("aes-256-cbc-plain64-sha1",
429                "aes", 256, "cbc", "plain64", None, "sha1"),
430     LUKSConfig("aes-256-cbc-essiv-sha256-sha1",
431                "aes", 256, "cbc", "essiv", "sha256", "sha1"),
432     LUKSConfig("aes-256-xts-essiv-sha256-sha1",
433                "aes", 256, "xts", "essiv", "sha256", "sha1"),
436     # LUKS default but smaller key sizes
437     LUKSConfig("aes-128-xts-plain64-sha256-sha1",
438                "aes", 128, "xts", "plain64", None, "sha1"),
439     LUKSConfig("aes-192-xts-plain64-sha256-sha1",
440                "aes", 192, "xts", "plain64", None, "sha1"),
442     LUKSConfig("twofish-128-xts-plain64-sha1",
443                "twofish", 128, "xts", "plain64", None, "sha1"),
444     LUKSConfig("twofish-192-xts-plain64-sha1",
445                "twofish", 192, "xts", "plain64", None, "sha1"),
447     LUKSConfig("serpent-128-xts-plain64-sha1",
448                "serpent", 128, "xts", "plain64", None, "sha1"),
449     LUKSConfig("serpent-192-xts-plain64-sha1",
450                "serpent", 192, "xts", "plain64", None, "sha1"),
452     LUKSConfig("cast6-128-xts-plain64-sha1",
453                "cast6", 128, "xts", "plain", None, "sha1"),
454     LUKSConfig("cast6-192-xts-plain64-sha1",
455                "cast6", 192, "xts", "plain64", None, "sha1"),
458     # LUKS default but diff hash
459     LUKSConfig("aes-256-xts-plain64-sha224",
460                "aes", 256, "xts", "plain64", None, "sha224"),
461     LUKSConfig("aes-256-xts-plain64-sha256",
462                "aes", 256, "xts", "plain64", None, "sha256"),
463     LUKSConfig("aes-256-xts-plain64-sha384",
464                "aes", 256, "xts", "plain64", None, "sha384"),
465     LUKSConfig("aes-256-xts-plain64-sha512",
466                "aes", 256, "xts", "plain64", None, "sha512"),
467     LUKSConfig("aes-256-xts-plain64-ripemd160",
468                "aes", 256, "xts", "plain64", None, "ripemd160"),
470     # Password in slot 3
471     LUKSConfig("aes-256-xts-plain-sha1-pwslot3",
472                "aes", 256, "xts", "plain", None, "sha1",
473                passwords={
474                    "3": "slot3",
475                }),
477     # Passwords in every slot
478     LUKSConfig("aes-256-xts-plain-sha1-pwallslots",
479                "aes", 256, "xts", "plain", None, "sha1",
480                passwords={
481                    "0": "slot1",
482                    "1": "slot1",
483                    "2": "slot2",
484                    "3": "slot3",
485                    "4": "slot4",
486                    "5": "slot5",
487                    "6": "slot6",
488                    "7": "slot7",
489                }),
491     # Check handling of default hash alg (sha256) with essiv
492     LUKSConfig("aes-256-cbc-essiv-auto-sha1",
493                "aes", 256, "cbc", "essiv", None, "sha1"),
495     # Check that a useless hash provided for 'plain64' iv gen
496     # is ignored and no error raised
497     LUKSConfig("aes-256-cbc-plain64-sha256-sha1",
498                "aes", 256, "cbc", "plain64", "sha256", "sha1"),
502 blacklist = [
503     # We don't have a cast-6 cipher impl for QEMU yet
504     "cast6-256-xts-plain64-sha1",
505     "cast6-128-xts-plain64-sha1",
506     "cast6-192-xts-plain64-sha1",
508     # GCrypt doesn't support Twofish with 192 bit key
509     "twofish-192-xts-plain64-sha1",
512 whitelist = []
513 if "LUKS_CONFIG" in os.environ:
514     whitelist = os.environ["LUKS_CONFIG"].split(",")
516 for config in configs:
517     if config.name in blacklist:
518         iotests.log("Skipping %s in blacklist" % config.name)
519         continue
521     if len(whitelist) > 0 and config.name not in whitelist:
522         iotests.log("Skipping %s not in whitelist" % config.name)
523         continue
525     test_once(config, qemu_img=False)
527     # XXX we should support setting passwords in a non-0
528     # key slot with 'qemu-img create' in future
529     (pw, slot) = config.first_password()
530     if slot == "0":
531         test_once(config, qemu_img=True)