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Merge pull request #912 from enkore/stuff/decrypt-integrity-test 

decrypt integrity test + some other tests
This commit is contained in:
enkore 2016-05-13 22:31:49 +02:00
parent d4225f7dda ad5ae32cc4
commit 0e8bd0ac6d
2 changed files with 143 additions and 66 deletions
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8
borg/testsuite/archiver.py
View File

@ -353,6 +353,14 @@ class ArchiverTestCase(ArchiverTestCaseBase):
# the interesting parts of info_output2 and info_output should be same
self.assert_equal(filter(info_output), filter(info_output2))
def test_symlink_extract(self):
self.create_test_files()
self.cmd('init', self.repository_location)
self.cmd('create', self.repository_location + '::test', 'input')
with changedir('output'):
self.cmd('extract', self.repository_location + '::test')
assert os.readlink('input/link1') == 'somewhere'
def test_atime(self):
self.create_test_files()
atime, mtime = 123456780, 234567890

189
borg/testsuite/key.py
View File

@ -1,17 +1,24 @@
import getpass
import os
import re
import shutil
import tempfile
from binascii import hexlify, unhexlify
import pytest
from ..crypto import bytes_to_long, num_aes_blocks
from ..key import PlaintextKey, PassphraseKey, KeyfileKey
from ..helpers import Location, Chunk, bin_to_hex
from . import BaseTestCase, environment_variable
from ..key import PlaintextKey, PassphraseKey, KeyfileKey, Passphrase, PasswordRetriesExceeded, bin_to_hex
from ..helpers import Location, Chunk, IntegrityError
class KeyTestCase(BaseTestCase):
@pytest.fixture(autouse=True)
def clean_env(monkeypatch):
# Workaround for some tests (testsuite/archiver) polluting the environment
monkeypatch.delenv('BORG_PASSPHRASE', False)
class TestKey:
class MockArgs:
location = Location(tempfile.mkstemp()[1])
@ -31,14 +38,10 @@ class KeyTestCase(BaseTestCase):
"""))
keyfile2_id = unhexlify('c3fbf14bc001ebcc3cd86e696c13482ed071740927cd7cbe1b01b4bfcee49314')
def setUp(self):
self.tmppath = tempfile.mkdtemp()
os.environ['BORG_KEYS_DIR'] = self.tmppath
self.tmppath2 = tempfile.mkdtemp()
def tearDown(self):
shutil.rmtree(self.tmppath)
shutil.rmtree(self.tmppath2)
@pytest.fixture
def keys_dir(self, request, monkeypatch, tmpdir):
monkeypatch.setenv('BORG_KEYS_DIR', tmpdir)
return tmpdir
class MockRepository:
class _Location:
@ -51,78 +54,144 @@ class KeyTestCase(BaseTestCase):
def test_plaintext(self):
key = PlaintextKey.create(None, None)
chunk = Chunk(b'foo')
self.assert_equal(hexlify(key.id_hash(chunk.data)), b'2c26b46b68ffc68ff99b453c1d30413413422d706483bfa0f98a5e886266e7ae')
self.assert_equal(chunk, key.decrypt(key.id_hash(chunk.data), key.encrypt(chunk)))
assert hexlify(key.id_hash(chunk.data)) == b'2c26b46b68ffc68ff99b453c1d30413413422d706483bfa0f98a5e886266e7ae'
assert chunk == key.decrypt(key.id_hash(chunk.data), key.encrypt(chunk))
def test_keyfile(self):
os.environ['BORG_PASSPHRASE'] = 'test'
def test_keyfile(self, monkeypatch, keys_dir):
monkeypatch.setenv('BORG_PASSPHRASE', 'test')
key = KeyfileKey.create(self.MockRepository(), self.MockArgs())
self.assert_equal(bytes_to_long(key.enc_cipher.iv, 8), 0)
assert bytes_to_long(key.enc_cipher.iv, 8) == 0
manifest = key.encrypt(Chunk(b'XXX'))
self.assert_equal(key.extract_nonce(manifest), 0)
assert key.extract_nonce(manifest) == 0
manifest2 = key.encrypt(Chunk(b'XXX'))
self.assert_not_equal(manifest, manifest2)
self.assert_equal(key.decrypt(None, manifest), key.decrypt(None, manifest2))
self.assert_equal(key.extract_nonce(manifest2), 1)
assert manifest != manifest2
assert key.decrypt(None, manifest) == key.decrypt(None, manifest2)
assert key.extract_nonce(manifest2) == 1
iv = key.extract_nonce(manifest)
key2 = KeyfileKey.detect(self.MockRepository(), manifest)
self.assert_equal(bytes_to_long(key2.enc_cipher.iv, 8), iv + num_aes_blocks(len(manifest) - KeyfileKey.PAYLOAD_OVERHEAD))
assert bytes_to_long(key2.enc_cipher.iv, 8) == iv + num_aes_blocks(len(manifest) - KeyfileKey.PAYLOAD_OVERHEAD)
# Key data sanity check
self.assert_equal(len(set([key2.id_key, key2.enc_key, key2.enc_hmac_key])), 3)
self.assert_equal(key2.chunk_seed == 0, False)
assert len({key2.id_key, key2.enc_key, key2.enc_hmac_key}) == 3
assert key2.chunk_seed != 0
chunk = Chunk(b'foo')
self.assert_equal(chunk, key2.decrypt(key.id_hash(chunk.data), key.encrypt(chunk)))
assert chunk == key2.decrypt(key.id_hash(chunk.data), key.encrypt(chunk))
def test_keyfile_kfenv(self):
keyfile = os.path.join(self.tmppath2, 'keyfile')
with environment_variable(BORG_KEY_FILE=keyfile, BORG_PASSPHRASE='testkf'):
assert not os.path.exists(keyfile)
def test_keyfile_kfenv(self, tmpdir, monkeypatch):
keyfile = tmpdir.join('keyfile')
monkeypatch.setenv('BORG_KEY_FILE', str(keyfile))
monkeypatch.setenv('BORG_PASSPHRASE', 'testkf')
assert not keyfile.exists()
key = KeyfileKey.create(self.MockRepository(), self.MockArgs())
assert os.path.exists(keyfile)
assert keyfile.exists()
chunk = Chunk(b'XXX')
chunk_id = key.id_hash(chunk.data)
chunk_cdata = key.encrypt(chunk)
key = KeyfileKey.detect(self.MockRepository(), chunk_cdata)
self.assert_equal(chunk, key.decrypt(chunk_id, chunk_cdata))
os.unlink(keyfile)
self.assert_raises(FileNotFoundError, KeyfileKey.detect, self.MockRepository(), chunk_cdata)
assert chunk == key.decrypt(chunk_id, chunk_cdata)
keyfile.remove()
with pytest.raises(FileNotFoundError):
KeyfileKey.detect(self.MockRepository(), chunk_cdata)
def test_keyfile2(self):
with open(os.path.join(os.environ['BORG_KEYS_DIR'], 'keyfile'), 'w') as fd:
def test_keyfile2(self, monkeypatch, keys_dir):
with keys_dir.join('keyfile').open('w') as fd:
fd.write(self.keyfile2_key_file)
os.environ['BORG_PASSPHRASE'] = 'passphrase'
monkeypatch.setenv('BORG_PASSPHRASE', 'passphrase')
key = KeyfileKey.detect(self.MockRepository(), self.keyfile2_cdata)
self.assert_equal(key.decrypt(self.keyfile2_id, self.keyfile2_cdata).data, b'payload')
assert key.decrypt(self.keyfile2_id, self.keyfile2_cdata).data == b'payload'
def test_keyfile2_kfenv(self):
keyfile = os.path.join(self.tmppath2, 'keyfile')
with open(keyfile, 'w') as fd:
def test_keyfile2_kfenv(self, tmpdir, monkeypatch):
keyfile = tmpdir.join('keyfile')
with keyfile.open('w') as fd:
fd.write(self.keyfile2_key_file)
with environment_variable(BORG_KEY_FILE=keyfile, BORG_PASSPHRASE='passphrase'):
monkeypatch.setenv('BORG_KEY_FILE', str(keyfile))
monkeypatch.setenv('BORG_PASSPHRASE', 'passphrase')
key = KeyfileKey.detect(self.MockRepository(), self.keyfile2_cdata)
self.assert_equal(key.decrypt(self.keyfile2_id, self.keyfile2_cdata).data, b'payload')
assert key.decrypt(self.keyfile2_id, self.keyfile2_cdata).data == b'payload'
def test_passphrase(self):
os.environ['BORG_PASSPHRASE'] = 'test'
def test_passphrase(self, keys_dir, monkeypatch):
monkeypatch.setenv('BORG_PASSPHRASE', 'test')
key = PassphraseKey.create(self.MockRepository(), None)
self.assert_equal(bytes_to_long(key.enc_cipher.iv, 8), 0)
self.assert_equal(hexlify(key.id_key), b'793b0717f9d8fb01c751a487e9b827897ceea62409870600013fbc6b4d8d7ca6')
self.assert_equal(hexlify(key.enc_hmac_key), b'b885a05d329a086627412a6142aaeb9f6c54ab7950f996dd65587251f6bc0901')
self.assert_equal(hexlify(key.enc_key), b'2ff3654c6daf7381dbbe718d2b20b4f1ea1e34caa6cc65f6bb3ac376b93fed2a')
self.assert_equal(key.chunk_seed, -775740477)
assert bytes_to_long(key.enc_cipher.iv, 8) == 0
assert hexlify(key.id_key) == b'793b0717f9d8fb01c751a487e9b827897ceea62409870600013fbc6b4d8d7ca6'
assert hexlify(key.enc_hmac_key) == b'b885a05d329a086627412a6142aaeb9f6c54ab7950f996dd65587251f6bc0901'
assert hexlify(key.enc_key) == b'2ff3654c6daf7381dbbe718d2b20b4f1ea1e34caa6cc65f6bb3ac376b93fed2a'
assert key.chunk_seed == -775740477
manifest = key.encrypt(Chunk(b'XXX'))
self.assert_equal(key.extract_nonce(manifest), 0)
assert key.extract_nonce(manifest) == 0
manifest2 = key.encrypt(Chunk(b'XXX'))
self.assert_not_equal(manifest, manifest2)
self.assert_equal(key.decrypt(None, manifest), key.decrypt(None, manifest2))
self.assert_equal(key.extract_nonce(manifest2), 1)
assert manifest != manifest2
assert key.decrypt(None, manifest) == key.decrypt(None, manifest2)
assert key.extract_nonce(manifest2) == 1
iv = key.extract_nonce(manifest)
key2 = PassphraseKey.detect(self.MockRepository(), manifest)
self.assert_equal(bytes_to_long(key2.enc_cipher.iv, 8), iv + num_aes_blocks(len(manifest) - PassphraseKey.PAYLOAD_OVERHEAD))
self.assert_equal(key.id_key, key2.id_key)
self.assert_equal(key.enc_hmac_key, key2.enc_hmac_key)
self.assert_equal(key.enc_key, key2.enc_key)
self.assert_equal(key.chunk_seed, key2.chunk_seed)
assert bytes_to_long(key2.enc_cipher.iv, 8) == iv + num_aes_blocks(len(manifest) - PassphraseKey.PAYLOAD_OVERHEAD)
assert key.id_key == key2.id_key
assert key.enc_hmac_key == key2.enc_hmac_key
assert key.enc_key == key2.enc_key
assert key.chunk_seed == key2.chunk_seed
chunk = Chunk(b'foo')
self.assert_equal(hexlify(key.id_hash(chunk.data)), b'818217cf07d37efad3860766dcdf1d21e401650fed2d76ed1d797d3aae925990')
self.assert_equal(chunk, key2.decrypt(key2.id_hash(chunk.data), key.encrypt(chunk)))
assert hexlify(key.id_hash(chunk.data)) == b'818217cf07d37efad3860766dcdf1d21e401650fed2d76ed1d797d3aae925990'
assert chunk == key2.decrypt(key2.id_hash(chunk.data), key.encrypt(chunk))
def _corrupt_byte(self, key, data, offset):
data = bytearray(data)
data[offset] += 1
with pytest.raises(IntegrityError):
key.decrypt("", data)
def test_decrypt_integrity(self, monkeypatch, keys_dir):
with keys_dir.join('keyfile').open('w') as fd:
fd.write(self.keyfile2_key_file)
monkeypatch.setenv('BORG_PASSPHRASE', 'passphrase')
key = KeyfileKey.detect(self.MockRepository(), self.keyfile2_cdata)
data = self.keyfile2_cdata
for i in range(len(data)):
self._corrupt_byte(key, data, i)
with pytest.raises(IntegrityError):
data = bytearray(self.keyfile2_cdata)
id = bytearray(key.id_hash(data)) # corrupt chunk id
id[12] = 0
key.decrypt(id, data)
class TestPassphrase:
def test_passphrase_new_verification(self, capsys, monkeypatch):
monkeypatch.setattr(getpass, 'getpass', lambda prompt: "12aöäü")
monkeypatch.setenv('BORG_DISPLAY_PASSPHRASE', 'no')
Passphrase.new()
out, err = capsys.readouterr()
assert "12" not in out
assert "12" not in err
monkeypatch.setenv('BORG_DISPLAY_PASSPHRASE', 'yes')
passphrase = Passphrase.new()
out, err = capsys.readouterr()
assert "313261c3b6c3a4c3bc" not in out
assert "313261c3b6c3a4c3bc" in err
assert passphrase == "12aöäü"
monkeypatch.setattr(getpass, 'getpass', lambda prompt: "1234/@=")
Passphrase.new()
out, err = capsys.readouterr()
assert "1234/@=" not in out
assert "1234/@=" in err
def test_passphrase_new_empty(self, capsys, monkeypatch):
monkeypatch.delenv('BORG_PASSPHRASE', False)
monkeypatch.setattr(getpass, 'getpass', lambda prompt: "")
with pytest.raises(PasswordRetriesExceeded):
Passphrase.new(allow_empty=False)
out, err = capsys.readouterr()
assert "must not be blank" in err
def test_passphrase_new_retries(self, monkeypatch):
monkeypatch.delenv('BORG_PASSPHRASE', False)
ascending_numbers = iter(range(20))
monkeypatch.setattr(getpass, 'getpass', lambda prompt: str(next(ascending_numbers)))
with pytest.raises(PasswordRetriesExceeded):
Passphrase.new()
def test_passphrase_repr(self):
assert "secret" not in repr(Passphrase("secret"))