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from ..utils import base64url_encode, ensure_binary
class Key:
"""
A simple interface for implementing JWK keys.
"""
def __init__(self, key, algorithm):
pass
def sign(self, msg):
raise NotImplementedError()
def verify(self, msg, sig):
raise NotImplementedError()
def public_key(self):
raise NotImplementedError()
def to_pem(self):
raise NotImplementedError()
def to_dict(self):
raise NotImplementedError()
def encrypt(self, plain_text, aad=None):
"""
Encrypt the plain text and generate an auth tag if appropriate
Args:
plain_text (bytes): Data to encrypt
aad (bytes, optional): Authenticated Additional Data if key's algorithm supports auth mode
Returns:
(bytes, bytes, bytes): IV, cipher text, and auth tag
"""
raise NotImplementedError()
def decrypt(self, cipher_text, iv=None, aad=None, tag=None):
"""
Decrypt the cipher text and validate the auth tag if present
Args:
cipher_text (bytes): Cipher text to decrypt
iv (bytes): IV if block mode
aad (bytes): Additional Authenticated Data to verify if auth mode
tag (bytes): Authentication tag if auth mode
Returns:
bytes: Decrypted value
"""
raise NotImplementedError()
def wrap_key(self, key_data):
"""
Wrap the the plain text key data
Args:
key_data (bytes): Key data to wrap
Returns:
bytes: Wrapped key
"""
raise NotImplementedError()
def unwrap_key(self, wrapped_key):
"""
Unwrap the the wrapped key data
Args:
wrapped_key (bytes): Wrapped key data to unwrap
Returns:
bytes: Unwrapped key
"""
raise NotImplementedError()
class DIRKey(Key):
def __init__(self, key_data, algorithm):
self._key = ensure_binary(key_data)
self._alg = algorithm
def to_dict(self):
return {
"alg": self._alg,
"kty": "oct",
"k": base64url_encode(self._key),
}
|
