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