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# ------------------------------------
# Copyright (c) Microsoft Corporation.
# Licensed under the MIT License.
# ------------------------------------
import hashlib
import os
import pytest
from azure.keyvault.keys import KeyCurveName, KeyVaultKey
from azure.keyvault.keys.crypto import (EncryptionAlgorithm, KeyWrapAlgorithm,
SignatureAlgorithm)
from azure.keyvault.keys.crypto._providers import \
get_local_cryptography_provider
from keys import EC_KEYS, RSA_KEYS
@pytest.mark.parametrize(
"key,algorithm,hash_function",
(
(EC_KEYS[KeyCurveName.p_256], SignatureAlgorithm.es256, hashlib.sha256),
(EC_KEYS[KeyCurveName.p_256_k], SignatureAlgorithm.es256_k, hashlib.sha256),
(EC_KEYS[KeyCurveName.p_384], SignatureAlgorithm.es384, hashlib.sha384),
(EC_KEYS[KeyCurveName.p_521], SignatureAlgorithm.es512, hashlib.sha512),
),
)
def test_ec_sign_verify(key, algorithm, hash_function):
provider = get_local_cryptography_provider(key.key)
digest = hash_function(b"message").digest()
sign_result = provider.sign(algorithm, digest)
verify_result = provider.verify(sign_result.algorithm, digest, sign_result.signature)
assert verify_result.is_valid
@pytest.mark.parametrize("key", RSA_KEYS.values())
@pytest.mark.parametrize("algorithm", (a for a in EncryptionAlgorithm if a.startswith("RSA")))
def test_rsa_encrypt_decrypt(key, algorithm):
provider = get_local_cryptography_provider(key.key)
plaintext = b"plaintext"
encrypt_result = provider.encrypt(algorithm, plaintext)
decrypt_result = provider.decrypt(encrypt_result.algorithm, encrypt_result.ciphertext)
assert decrypt_result.plaintext == plaintext
@pytest.mark.parametrize(
"algorithm,key_size",
(
(EncryptionAlgorithm.a256_cbcpad, 32),
(EncryptionAlgorithm.a192_cbcpad, 24),
(EncryptionAlgorithm.a128_cbcpad, 16),
)
)
def test_symmetric_encrypt_decrypt(algorithm, key_size):
jwk = {
"k": os.urandom(key_size),
"kid":"http://localhost/keys/key/version",
"kty": "oct-HSM",
"key_ops": ("encrypt", "decrypt")
}
key = KeyVaultKey(key_id="http://localhost/keys/key/version", jwk=jwk)
provider = get_local_cryptography_provider(key.key)
plaintext = b"plaintext"
iv = os.urandom(16)
encrypt_result = provider.encrypt(algorithm, plaintext, iv=iv)
assert encrypt_result.key_id == key.id
assert encrypt_result.iv == iv
decrypt_result = provider.decrypt(encrypt_result.algorithm, encrypt_result.ciphertext, iv=encrypt_result.iv)
assert decrypt_result.plaintext == plaintext
# Try with no IV to verify that we generate one for local crypto
encrypt_result = provider.encrypt(algorithm, plaintext, iv=None)
assert encrypt_result.key_id == key.id
assert len(encrypt_result.iv) == 16
decrypt_result = provider.decrypt(encrypt_result.algorithm, encrypt_result.ciphertext, iv=encrypt_result.iv)
assert decrypt_result.plaintext == plaintext
@pytest.mark.parametrize("key", RSA_KEYS.values())
@pytest.mark.parametrize(
"algorithm,hash_function",
(
(
(SignatureAlgorithm.ps256, hashlib.sha256),
(SignatureAlgorithm.ps384, hashlib.sha384),
(SignatureAlgorithm.ps512, hashlib.sha512),
(SignatureAlgorithm.rs256, hashlib.sha256),
(SignatureAlgorithm.rs384, hashlib.sha384),
(SignatureAlgorithm.rs512, hashlib.sha512),
)
),
)
def test_rsa_sign_verify(key, algorithm, hash_function):
message = b"message"
provider = get_local_cryptography_provider(key.key)
digest = hash_function(message).digest()
sign_result = provider.sign(algorithm, digest)
verify_result = provider.verify(sign_result.algorithm, digest, sign_result.signature)
assert verify_result.is_valid
@pytest.mark.parametrize("key", RSA_KEYS.values())
@pytest.mark.parametrize("algorithm", (a for a in KeyWrapAlgorithm if a.startswith("RSA")))
def test_rsa_wrap_unwrap(key, algorithm):
plaintext = b"arbitrary bytes"
key.key.kid = key.id
provider = get_local_cryptography_provider(key.key)
wrap_result = provider.wrap_key(algorithm, plaintext)
assert wrap_result.key_id == key.id
unwrap_result = provider.unwrap_key(wrap_result.algorithm, wrap_result.encrypted_key)
assert unwrap_result.key == plaintext
@pytest.mark.parametrize("algorithm", (a for a in KeyWrapAlgorithm if a.startswith("A")))
def test_symmetric_wrap_unwrap(algorithm):
jwk = {
"k": os.urandom(32),
"kid":"http://localhost/keys/key/version",
"kty": "oct",
"key_ops": ("unwrapKey", "wrapKey")
}
key = KeyVaultKey(key_id="http://localhost/keys/key/version", jwk=jwk)
provider = get_local_cryptography_provider(key.key)
key_bytes = os.urandom(32)
wrap_result = provider.wrap_key(algorithm, key_bytes)
assert wrap_result.key_id == key.id
unwrap_result = provider.unwrap_key(wrap_result.algorithm, wrap_result.encrypted_key)
assert unwrap_result.key == key_bytes
@pytest.mark.parametrize("key", RSA_KEYS.values())
@pytest.mark.parametrize(
"algorithm",
[a for a in KeyWrapAlgorithm if not a.startswith("RSA")] + [a for a in SignatureAlgorithm if a.startswith("ES")],
)
def test_unsupported_rsa_operations(key, algorithm):
"""The crypto provider should raise NotImplementedError when a key doesn't support an operation or algorithm"""
provider = get_local_cryptography_provider(key.key)
if isinstance(algorithm, EncryptionAlgorithm):
with pytest.raises(NotImplementedError):
provider.encrypt(algorithm, b"...")
with pytest.raises(NotImplementedError):
provider.decrypt(algorithm, b"...")
if isinstance(algorithm, KeyWrapAlgorithm):
with pytest.raises(NotImplementedError):
provider.wrap_key(algorithm, b"...")
with pytest.raises(NotImplementedError):
provider.unwrap_key(algorithm, b"...")
elif isinstance(algorithm, SignatureAlgorithm):
with pytest.raises(NotImplementedError):
provider.sign(algorithm, b"...")
with pytest.raises(NotImplementedError):
provider.verify(algorithm, b"...", b"...")
@pytest.mark.parametrize("key", EC_KEYS.values())
@pytest.mark.parametrize(
"algorithm",
[a for a in KeyWrapAlgorithm if a.startswith("RSA")]
+ [a for a in SignatureAlgorithm if not a.startswith("ES")]
+ list(EncryptionAlgorithm),
)
def test_unsupported_ec_operations(key, algorithm):
"""The crypto provider should raise NotImplementedError when a key doesn't support an operation or algorithm"""
provider = get_local_cryptography_provider(key.key)
if isinstance(algorithm, EncryptionAlgorithm):
with pytest.raises(NotImplementedError):
provider.encrypt(algorithm, b"...")
with pytest.raises(NotImplementedError):
provider.decrypt(algorithm, b"...")
if isinstance(algorithm, KeyWrapAlgorithm):
with pytest.raises(NotImplementedError):
provider.wrap_key(algorithm, b"...")
with pytest.raises(NotImplementedError):
provider.unwrap_key(algorithm, b"...")
elif isinstance(algorithm, SignatureAlgorithm):
with pytest.raises(NotImplementedError):
provider.sign(algorithm, b"...")
with pytest.raises(NotImplementedError):
provider.verify(algorithm, b"...", b"...")
@pytest.mark.parametrize(
"algorithm",
[a for a in KeyWrapAlgorithm if a.startswith("RSA")]
+ list(SignatureAlgorithm)
+ [a for a in EncryptionAlgorithm if not a.endswith("PAD")],
)
def test_unsupported_symmetric_operations(algorithm):
"""The crypto provider should raise NotImplementedError when a key doesn't support an operation or algorithm"""
jwk = {"k": os.urandom(32), "kty": "oct", "key_ops": ("unwrapKey", "wrapKey")}
key = KeyVaultKey(key_id="http://localhost/keys/key/version", jwk=jwk)
provider = get_local_cryptography_provider(key.key)
if isinstance(algorithm, EncryptionAlgorithm):
with pytest.raises(NotImplementedError):
provider.encrypt(algorithm, b"...")
with pytest.raises(NotImplementedError):
provider.decrypt(algorithm, b"...")
if isinstance(algorithm, KeyWrapAlgorithm):
with pytest.raises(NotImplementedError):
provider.wrap_key(algorithm, b"...")
with pytest.raises(NotImplementedError):
provider.unwrap_key(algorithm, b"...")
elif isinstance(algorithm, SignatureAlgorithm):
with pytest.raises(NotImplementedError):
provider.sign(algorithm, b"...")
with pytest.raises(NotImplementedError):
provider.verify(algorithm, b"...", b"...")
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