def test_invalid_key(self, backend):
kdf = KBKDFHMAC(
hashes.SHA256(),
Mode.CounterMode,
32,
4,
4,
CounterLocation.BeforeFixed,
b"label",
b"context",
None,
backend=backend,
)
key = kdf.derive(b"material")
kdf = KBKDFHMAC(
hashes.SHA256(),
Mode.CounterMode,
32,
4,
4,
CounterLocation.BeforeFixed,
b"label",
b"context",
None,
backend=backend,
)
with pytest.raises(InvalidKey):
kdf.verify(b"material2", key)
def test_invalid_key(self):
kdf = KBKDFHMAC(hashes.SHA256(),
Mode.CounterMode,
32,
4,
4,
CounterLocation.BeforeFixed,
b'label',
b'context',
None,
backend=default_backend())
key = kdf.derive(b"material")
kdf = KBKDFHMAC(hashes.SHA256(),
Mode.CounterMode,
32,
4,
4,
CounterLocation.BeforeFixed,
b'label',
b'context',
None,
backend=default_backend())
with pytest.raises(InvalidKey):
kdf.verify(b"material2", key)
def test_invalid_key(self, backend):
kdf = KBKDFHMAC(hashes.SHA256(), Mode.CounterMode, 32, 4, 4,
CounterLocation.BeforeFixed, b'label', b'context',
None, backend=backend)
key = kdf.derive(b"material")
kdf = KBKDFHMAC(hashes.SHA256(), Mode.CounterMode, 32, 4, 4,
CounterLocation.BeforeFixed, b'label', b'context',
None, backend=backend)
with pytest.raises(InvalidKey):
kdf.verify(b"material2", key)
def test_already_finalized(self, backend):
kdf = KBKDFHMAC(hashes.SHA256(), Mode.CounterMode, 32, 4, 4,
CounterLocation.BeforeFixed, b'label', b'context',
None, backend=backend)
kdf.derive(b'material')
with pytest.raises(AlreadyFinalized):
kdf.derive(b'material2')
kdf = KBKDFHMAC(hashes.SHA256(), Mode.CounterMode, 32, 4, 4,
CounterLocation.BeforeFixed, b'label', b'context',
None, backend=backend)
key = kdf.derive(b'material')
with pytest.raises(AlreadyFinalized):
kdf.verify(b'material', key)
kdf = KBKDFHMAC(hashes.SHA256(), Mode.CounterMode, 32, 4, 4,
CounterLocation.BeforeFixed, b'label', b'context',
None, backend=backend)
kdf.verify(b'material', key)
with pytest.raises(AlreadyFinalized):
kdf.verify(b"material", key)
def test_already_finalized(self, backend):
kdf = KBKDFHMAC(
hashes.SHA256(),
Mode.CounterMode,
32,
4,
4,
CounterLocation.BeforeFixed,
b"label",
b"context",
None,
backend=backend,
)
kdf.derive(b"material")
with pytest.raises(AlreadyFinalized):
kdf.derive(b"material2")
kdf = KBKDFHMAC(
hashes.SHA256(),
Mode.CounterMode,
32,
4,
4,
CounterLocation.BeforeFixed,
b"label",
b"context",
None,
backend=backend,
)
key = kdf.derive(b"material")
with pytest.raises(AlreadyFinalized):
kdf.verify(b"material", key)
kdf = KBKDFHMAC(
hashes.SHA256(),
Mode.CounterMode,
32,
4,
4,
CounterLocation.BeforeFixed,
b"label",
b"context",
None,
backend=backend,
)
kdf.verify(b"material", key)
with pytest.raises(AlreadyFinalized):
kdf.verify(b"material", key)
def test_already_finalized(self):
kdf = KBKDFHMAC(hashes.SHA256(),
Mode.CounterMode,
32,
4,
4,
CounterLocation.BeforeFixed,
b'label',
b'context',
None,
backend=default_backend())
kdf.derive(b'material')
with pytest.raises(AlreadyFinalized):
kdf.derive(b'material2')
kdf = KBKDFHMAC(hashes.SHA256(),
Mode.CounterMode,
32,
4,
4,
CounterLocation.BeforeFixed,
b'label',
b'context',
None,
backend=default_backend())
key = kdf.derive(b'material')
with pytest.raises(AlreadyFinalized):
kdf.verify(b'material', key)
kdf = KBKDFHMAC(hashes.SHA256(),
Mode.CounterMode,
32,
4,
4,
CounterLocation.BeforeFixed,
b'label',
b'context',
None,
backend=default_backend())
kdf.verify(b'material', key)
with pytest.raises(AlreadyFinalized):
kdf.verify(b"material", key)