def test_ecdh_direct_hkdf_apply_with_ecdh_ss_p256(self):
rec = Recipient.from_jwk({
"kty":
"EC",
"alg":
"ECDH-SS+HKDF-256",
"d":
"kwibx3gas6Kz1V2fyQHKSnr-ybflddSjN0eOnbmLmyo",
"crv":
"P-256",
"kid":
"01",
"x":
"-eZXC6nV-xgthy8zZMCN8pcYSeE2XfWWqckA2fsxHPc",
"y":
"BGU5soLgsu_y7GN2I3EPUXS9EZ7Sw0qif-V70JtInFI",
})
with open(key_path("public_key_es256.pem")) as key_file:
pub_key = COSEKey.from_pem(key_file.read(), kid="01")
enc_key = rec.apply(recipient_key=pub_key,
salt=token_bytes(32),
context={"alg": "A128GCM"})
ctx = COSE.new(alg_auto_inclusion=True)
encoded = ctx.encode_and_encrypt(b"Hello world!",
enc_key,
recipients=[rec])
with open(key_path("private_key_es256.pem")) as key_file:
priv_key = COSEKey.from_pem(key_file.read(),
kid="01",
alg="ECDH-SS+HKDF-256")
assert b"Hello world!" == ctx.decode(encoded,
priv_key,
context={"alg": "A128GCM"})
def test_ecdh_direct_hkdf_apply_without_salt(self):
rec = Recipient.from_jwk({
"kty": "EC",
"crv": "P-256",
"alg": "ECDH-ES+HKDF-256"
})
with open(key_path("public_key_es256.pem")) as key_file:
pub_key = COSEKey.from_pem(key_file.read(), kid="01")
enc_key = rec.apply(
recipient_key=pub_key,
context=[
1,
[None, None, None],
[None, None, None],
[128, cbor2.dumps({1: -25})],
],
)
ctx = COSE.new(alg_auto_inclusion=True)
encoded = ctx.encode_and_encrypt(b"Hello world!",
enc_key,
recipients=[rec])
with open(key_path("private_key_es256.pem")) as key_file:
priv_key = COSEKey.from_pem(key_file.read(),
kid="01",
alg="ECDH-ES+HKDF-256")
assert b"Hello world!" == ctx.decode(encoded,
priv_key,
context={"alg": "A128GCM"})
def test_okp_key_derive_key_with_raw_context(self):
with open(key_path("private_key_x25519.pem")) as key_file:
private_key = COSEKey.from_pem(key_file.read(),
alg="ECDH-SS+HKDF-256")
pub_key = COSEKey.from_jwk({
"kty":
"OKP",
"alg":
"ECDH-ES+HKDF-256",
"kid":
"01",
"crv":
"X25519",
"x":
"y3wJq3uXPHeoCO4FubvTc7VcBuqpvUrSvU6ZMbHDTCI",
# "d": "vsJ1oX5NNi0IGdwGldiac75r-Utmq3Jq4LGv48Q_Qc4",
})
context = [
1,
[None, None, None],
[None, None, None],
[128, cbor2.dumps({1: -25})],
]
try:
private_key.derive_key(context, public_key=pub_key)
except Exception:
pytest.fail("derive_key() should not fail.")
def test_ecdh_direct_hkdf_apply_with_party_u_nonce(self):
nonce = token_bytes(32)
rec = Recipient.from_jwk({
"kty": "EC",
"crv": "P-256",
"alg": "ECDH-ES+HKDF-256"
})
with open(key_path("public_key_es256.pem")) as key_file:
pub_key = COSEKey.from_pem(key_file.read(), kid="01")
context = [
1,
[None, nonce, None],
[None, None, None],
[128, cbor2.dumps({1: -25})],
]
enc_key = rec.apply(recipient_key=pub_key, context=context)
assert nonce == rec._unprotected[-22]
ctx = COSE.new(alg_auto_inclusion=True)
encoded = ctx.encode_and_encrypt(b"Hello world!",
enc_key,
recipients=[rec])
with open(key_path("private_key_es256.pem")) as key_file:
priv_key = COSEKey.from_pem(key_file.read(),
kid="01",
alg="ECDH-ES+HKDF-256")
assert b"Hello world!" == ctx.decode(encoded,
priv_key,
context=context)
def test_ecdh_direct_hkdf_apply_with_ecdh_ss_p521_with_default_salt(self):
rec = Recipient.from_jwk({
"kty": "EC",
"alg": "ECDH-SS+HKDF-512",
"d":
"ADYyo73ZKicOjwGDYQ_ybZKnVzdAcxGm9OVAxQjzgVM4jaS-Iwtkz90oLdDz3shgKlDgtRK2Aa9lMhqR94hBo4IE",
"crv": "P-521",
"kid": "01",
"x":
"APkZitSJMJUMB-iPCt47sWu_CrnUHg6IAR4qjmHON-2u41Rjg6DNOS0LZYJJt-AVH5NgGVi8ElIfjo71b9HXCTOc",
"y":
"ASx-Cb--149HJ-e1KlSaY-1BOhwOdcTkxSt8BGbW7_hnGfzHsoXM3ywwNcp1Yad-FHUKwmCyMelMQEn2Rh4V2l3I",
"salt": "aabbccddeeff",
})
with open(key_path("public_key_es512.pem")) as key_file:
pub_key = COSEKey.from_pem(key_file.read(), kid="01")
enc_key = rec.apply(recipient_key=pub_key, context={"alg": "A128GCM"})
ctx = COSE.new(alg_auto_inclusion=True)
encoded = ctx.encode_and_encrypt(b"Hello world!",
enc_key,
recipients=[rec])
with open(key_path("private_key_es512.pem")) as key_file:
priv_key = COSEKey.from_pem(key_file.read(),
kid="01",
alg="ECDH-SS+HKDF-512")
assert b"Hello world!" == ctx.decode(encoded,
priv_key,
context={"alg": "A128GCM"})
def test_aes_key_wrap_apply_with_invalid_key(self):
key = COSEKey.from_symmetric_key(key="xxx", alg="HS256", kid="01")
ctx = AESKeyWrap({1: -3}, {},
sender_key=COSEKey.from_symmetric_key(alg="A128KW"))
with pytest.raises(EncodeError) as err:
ctx.apply(key, context={"alg": "A128GCM"})
pytest.fail("apply() should fail.")
assert "Failed to wrap key." in str(err.value)
def test_aes_key_wrap_wrap_key_without_alg(self):
key = COSEKey.from_symmetric_key(alg="A128GCM", kid="01")
ctx = AESKeyWrap({1: -3}, {},
sender_key=COSEKey.from_symmetric_key(alg="A128KW"))
with pytest.raises(ValueError) as err:
ctx.extract(key=key)
pytest.fail("extract() should fail.")
assert "alg should be set." in str(err.value)
def test_aes_key_wrap_wrap_key_without_ciphertext(self):
key = COSEKey.from_symmetric_key(alg="A128GCM", kid="01")
ctx = AESKeyWrap({1: -3}, {},
sender_key=COSEKey.from_symmetric_key(alg="A128KW"))
with pytest.raises(DecodeError) as err:
ctx.extract(key=key, alg="A128GCM")
pytest.fail("extract() should fail.")
assert "Failed to decode key." in str(err.value)
def test_ecdh_aes_key_wrap_extract_without_context(self):
enc_key = COSEKey.from_symmetric_key(alg="ChaCha20/Poly1305")
ctx = ECDH_AESKeyWrap({1: -29}, {4: b"01"})
with pytest.raises(ValueError) as err:
ctx.extract(enc_key, alg="ChaCha20/Poly1305")
pytest.fail("extract() should fail.")
assert "context should be set." in str(err.value)
def test_ec2_key_derive_key_with_invalid_alg(self, invalid_alg):
private_key = EC2Key({
1: 2,
-2:
b"\xa7\xddc*\xff\xc2?\x8b\xf8\x9c:\xad\xccDF\x9cZ \x04P\xef\x99\x0c=\xe6 w1\x08&\xba\xd9",
-3:
b"\xe2\xdb\xef\xfe\xb8\x8a\x12\xf27\xcb\x15:\x8a\xb9\x1a90B\x1a\x19^\xbc\xdc\xde\r\xb9s\xc1P\xf3\xaa\xdd",
-4:
b'\xe9\x16\x0c\xa96\x8d\xfa\xbc\xd5\xda"ua\xec\xf7\x96\r\x15\xf7_\xf3rb{\xb1\xde;\x99\x88\xafNh',
-1: 1,
3: -25,
})
pub_key = COSEKey.from_jwk({
"kty":
"EC",
"kid":
"01",
"crv":
"P-256",
"x":
"usWxHK2PmfnHKwXPS54m0kTcGJ90UiglWiGahtagnv8",
"y":
"IBOL-C3BttVivg-lSreASjpkttcsz-1rb7btKLv8EX4",
})
with pytest.raises(ValueError) as err:
private_key.derive_key({"alg": invalid_alg}, public_key=pub_key)
pytest.fail("derive_key() should fail.")
assert f"Unsupported or unknown alg for context information: {invalid_alg}." in str(
err.value)
def test_ec2_key_derive_key(self, alg):
private_key = EC2Key({
1: 2,
-2:
b"\xa7\xddc*\xff\xc2?\x8b\xf8\x9c:\xad\xccDF\x9cZ \x04P\xef\x99\x0c=\xe6 w1\x08&\xba\xd9",
-3:
b"\xe2\xdb\xef\xfe\xb8\x8a\x12\xf27\xcb\x15:\x8a\xb9\x1a90B\x1a\x19^\xbc\xdc\xde\r\xb9s\xc1P\xf3\xaa\xdd",
-4:
b'\xe9\x16\x0c\xa96\x8d\xfa\xbc\xd5\xda"ua\xec\xf7\x96\r\x15\xf7_\xf3rb{\xb1\xde;\x99\x88\xafNh',
-1: 1,
3: -25,
})
pub_key = COSEKey.from_jwk({
"kty":
"EC",
"kid":
"01",
"crv":
"P-256",
"x":
"usWxHK2PmfnHKwXPS54m0kTcGJ90UiglWiGahtagnv8",
"y":
"IBOL-C3BttVivg-lSreASjpkttcsz-1rb7btKLv8EX4",
})
try:
derived_key = private_key.derive_key({"alg": alg},
public_key=pub_key)
assert derived_key.kty == 4
except Exception:
pytest.fail("derive_key() should not fail.")
def test_ecdh_direct_hkdf_extract_with_invalid_private_key(
self, recipient_public_key):
rec = Recipient.from_jwk({
"kty": "EC",
"crv": "P-256",
"alg": "ECDH-ES+HKDF-256"
})
enc_key = rec.apply(recipient_key=recipient_public_key,
context={"alg": "A128GCM"})
ctx = COSE.new(alg_auto_inclusion=True)
encoded = ctx.encode_and_encrypt(b"Hello world!",
enc_key,
recipients=[rec])
another_priv_key = COSEKey.from_jwk({
"kty":
"EC",
"alg":
"ECDH-ES+HKDF-256",
"kid":
"01",
"crv":
"P-256",
"x":
"-eZXC6nV-xgthy8zZMCN8pcYSeE2XfWWqckA2fsxHPc",
"y":
"BGU5soLgsu_y7GN2I3EPUXS9EZ7Sw0qif-V70JtInFI",
"d":
"kwibx3gas6Kz1V2fyQHKSnr-ybflddSjN0eOnbmLmyo",
})
with pytest.raises(DecodeError) as err:
ctx.decode(encoded, another_priv_key, context={"alg": "A128GCM"})
pytest.fail("decode() should fail.")
assert "Failed to decrypt." in str(err.value)
def test_aes_key_wrap_constructor_with_invalid_alg(self):
with pytest.raises(ValueError) as err:
AESKeyWrap({1: -1}, {},
sender_key=COSEKey.from_symmetric_key(alg="A128KW"))
pytest.fail("AESKeyWrap() should fail.")
assert "algs in protected and sender_key do not match." in str(
err.value)
def test_direct_hkdf_verify_key_with_invalid_material(self):
material = COSEKey.from_symmetric_key(
key=base64url_decode(
"hJtXIZ2uSN5kbQfbtTNWbpdmhkV8FJG-Onbc6mxCcYg"),
alg="A256GCM",
)
ctx = DirectHKDF({1: -10}, {-20: b"aabbccddeeff"})
context = {
"alg": "AES-CCM-16-64-128",
"party_u": {
"identity": "lighting-client",
},
"party_v": {
"identity": "lighting-server",
},
"supp_pub": {
"other": "Encryption Example 02",
},
}
key = ctx.apply(
material,
context=context,
)
with pytest.raises(VerifyError) as err:
ctx.verify_key(
b"xxxxxxxxxx",
key.key,
context=context,
)
pytest.fail("verify_key() should fail.")
assert "Failed to verify key." in str(err.value)
def test_aes_key_wrap_apply_without_key(self):
ctx = AESKeyWrap({1: -3}, {},
sender_key=COSEKey.from_symmetric_key(alg="A128KW"))
with pytest.raises(ValueError) as err:
ctx.apply()
pytest.fail("apply() should fail.")
assert "key should be set." in str(err.value)
def test_direct_hkdf_extract_with_invalid_key(self):
key = COSEKey.from_symmetric_key(key="a", alg="HS256")
ctx = DirectHKDF({1: -10}, {-20: b"aabbccddeeff"})
with pytest.raises(ValueError) as err:
ctx.extract(key, alg="A128GCM")
pytest.fail("extract() should fail.")
assert "context should be set." in str(err.value)
def test_direct_hkdf_verify_key(self):
material = COSEKey.from_symmetric_key(
key=base64url_decode(
"hJtXIZ2uSN5kbQfbtTNWbpdmhkV8FJG-Onbc6mxCcYg"),
alg="A256GCM",
)
ctx = DirectHKDF({1: -10}, {-20: b"aabbccddeeff"})
context = {
"alg": "AES-CCM-16-64-128",
"party_u": {
"identity": "lighting-client",
},
"party_v": {
"identity": "lighting-server",
},
"supp_pub": {
"other": "Encryption Example 02",
},
}
key = ctx.apply(material, context=context)
ctx.verify_key(
base64url_decode("hJtXIZ2uSN5kbQfbtTNWbpdmhkV8FJG-Onbc6mxCcYg"),
key.key,
context=context,
)
def test_direct_hkdf_apply_without_alg(self):
material = COSEKey.from_symmetric_key(token_bytes(16))
ctx = DirectHKDF({1: -10}, {4: b"01"})
with pytest.raises(ValueError) as err:
ctx.apply(material)
pytest.fail("apply() should fail.")
assert "context should be set." in str(err.value)
def test_direct_hkdf_extract_with_invalid_context(self):
key = COSEKey.from_symmetric_key(alg="A128GCM")
ctx = DirectHKDF({1: -10}, {-20: b"aabbccddeeff"})
with pytest.raises(ValueError) as err:
ctx.extract(key, alg="A128GCM", context=[None, None, None])
pytest.fail("extract() should fail.")
assert "Invalid context information." in str(err.value)
def test_okp_key_derive_key_without_public_key(self):
with open(key_path("private_key_x25519.pem")) as key_file:
private_key = COSEKey.from_pem(key_file.read(),
alg="ECDH-SS+HKDF-256")
with pytest.raises(ValueError) as err:
private_key.derive_key({"alg": "A128GCM"})
assert "public_key should be set." in str(err.value)
def test_ecdh_direct_hkdf_through_cose_api_with_ecdh_es(
self, alg, crv, private_key_path, public_key_path):
sender_key = COSEKey.new({1: 2, -1: crv, 3: alg})
rec = Recipient.new(protected={1: alg}, sender_key=sender_key)
with open(key_path(public_key_path)) as key_file:
pub_key = COSEKey.from_pem(key_file.read(), kid="01")
enc_key = rec.apply(recipient_key=pub_key, context={"alg": "A128GCM"})
ctx = COSE.new(alg_auto_inclusion=True)
encoded = ctx.encode_and_encrypt(b"Hello world!",
enc_key,
recipients=[rec])
with open(key_path(private_key_path)) as key_file:
priv_key = COSEKey.from_pem(key_file.read(), kid="01", alg=alg)
assert b"Hello world!" == ctx.decode(encoded,
priv_key,
context={"alg": "A128GCM"})
def test_ecdh_aes_key_wrap_apply_without_context(self, sender_key_es):
enc_key = COSEKey.from_symmetric_key(alg="ChaCha20/Poly1305")
sender = ECDH_AESKeyWrap({1: -29}, {4: b"01"},
sender_key=sender_key_es)
with pytest.raises(ValueError) as err:
sender.apply(enc_key, recipient_key=recipient_public_key)
pytest.fail("apply() should fail.")
assert "context should be set." in str(err.value)
def recipient_public_key():
return COSEKey.from_jwk({
"kty": "EC",
"kid": "01",
"crv": "P-256",
"x": "Ze2loSV3wrroKUN_4zhwGhCqo3Xhu1td4QjeQ5wIVR0",
"y": "HlLtdXARY_f55A3fnzQbPcm6hgr34Mp8p-nuzQCE0Zw",
})
def test_aes_key_wrap_constructor_a256kw_invalid_key_length(self):
with pytest.raises(ValueError) as err:
AESKeyWrap(
{1: -5},
{},
sender_key=COSEKey.from_symmetric_key(key="xxx", alg="A256KW"),
)
pytest.fail("AESKeyWrap() should fail.")
assert "Invalid key length: 3." in str(err.value)
def test_aes_key_wrap_constructor_a256kw_with_key(self):
ctx = AESKeyWrap(
{1: -5},
{},
sender_key=COSEKey.from_symmetric_key(alg="A256KW",
key=token_bytes(32)),
)
assert isinstance(ctx, AESKeyWrap)
assert ctx.alg == -5
def test_ecdh_aes_key_wrap_apply_without_recipient_key(
self, sender_key_es):
enc_key = COSEKey.from_symmetric_key(alg="ChaCha20/Poly1305")
sender = ECDH_AESKeyWrap({1: -29}, {4: b"01"},
sender_key=sender_key_es)
with pytest.raises(ValueError) as err:
sender.apply(enc_key, context={"alg": "A128GCM"})
pytest.fail("apply() should fail.")
assert "recipient_key should be set in advance." in str(err.value)
def test_aes_key_wrap_constructor_a128kw_with_invalid_alg_in_sender_key(
self):
with pytest.raises(ValueError) as err:
AESKeyWrap(
{1: -3},
{},
sender_key=COSEKey.from_symmetric_key(alg="A128GCM"),
)
pytest.fail("AESKeyWrap() should fail.")
assert "Invalid alg in sender_key: 1." in str(err.value)
def recipient_private_key():
return COSEKey.from_jwk({
"kty": "EC",
"alg": "ECDH-ES+A128KW",
"kid": "01",
"crv": "P-256",
"x": "Ze2loSV3wrroKUN_4zhwGhCqo3Xhu1td4QjeQ5wIVR0",
"y": "HlLtdXARY_f55A3fnzQbPcm6hgr34Mp8p-nuzQCE0Zw",
"d": "r_kHyZ-a06rmxM3yESK84r1otSg-aQcVStkRhA-iCM8",
})
def test_direct_hkdf_apply_with_invalid_context(self, invalid, msg):
material = COSEKey.from_symmetric_key(
key=base64url_decode(
"hJtXIZ2uSN5kbQfbtTNWbpdmhkV8FJG-Onbc6mxCcYg"),
alg="A256GCM",
)
ctx = DirectHKDF({1: -10}, {-20: b"aabbccddeeff"})
with pytest.raises(ValueError) as err:
ctx.apply(key=material, context=invalid)
pytest.fail("apply() should fail.")
assert msg in str(err.value)
def test_direct_constructor(self):
k = COSEKey.from_symmetric_key(alg="HS256")
ctx = Direct({1: -6}, {})
assert isinstance(ctx, Direct)
assert ctx.alg == -6
with pytest.raises(NotImplementedError):
ctx.apply(k)
pytest.fail("apply() should fail.")
with pytest.raises(NotImplementedError):
ctx.extract(k)
pytest.fail("extract() should fail.")
