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int poly1305_init(void **state,
const uint8_t *r,
size_t r_len,
const uint8_t *s,
size_t s_len);
int poly1305_destroy(void *state);
int poly1305_update(void *state,
const uint8_t *in,
size_t len);
int poly1305_digest(const void *state,
uint8_t *digest,
size_t len);
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) � Poly1305_MACz�An Poly1305 MAC object.
Do not instantiate directly. Use the :func:`new` function.
:ivar digest_size: the size in bytes of the resulting MAC tag
:vartype digest_size: integer
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� t |� t t |� � t |� t t |� � � }|rt d|z � �t |j � t j � | _ |r| j |� y y )Nr z Parameter r is not 16 bytes longz Parameter s is not 16 bytes longz%Error %d while instantiating Poly1305)�len�
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address_ofr r r �get�poly1305_destroy�_state�update)�self�r�s�data�state�results �:/usr/lib/python3/dist-packages/Cryptodome/Hash/Poly1305.py�__init__zPoly1305_MAC.__init__? s� � � �q�6�R�<� � ?�@� @� �q�6�R�<� � ?�@� @� ��
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|� t t |� � � }|rt d|z � �| S )z�Authenticate the next chunk of message.
Args:
data (byte string/byte array/memoryview): The next chunk of data
z8You can only call 'digest' or 'hexdigest' on this objectz$Error %d while hashing Poly1305 data)
r � TypeErrorr �poly1305_updater r r r r r )r r! r# s r$ r zPoly1305_MAC.updateV sd � � �=�=�� V�W� W� �.�.�t�{�{���/@�/:�4�/@�/7��D� �/B�D�� � � C�f� L�M� M�� r& c � � t � �)N)�NotImplementedError)r s r$ �copyzPoly1305_MAC.copyg s � �!�#�#r& c �" � | j r | j S t d� }t j | j j � |t
t |� � � }|rt d|z � �t |� | _ | j S )z�Return the **binary** (non-printable) MAC tag of the message
authenticated so far.
:return: The MAC tag digest, computed over the data processed so far.
Binary form.
:rtype: byte string
r z'Error %d while creating Poly1305 digest)
r r r �poly1305_digestr r r r r r
)r �bfrr# s r$ �digestzPoly1305_MAC.digestj sx � � �=�=��=�=� �"�2�&�� �.�.�t�{�{���/@�/2�/7��C��/A�C�� � � F�� O�P� P�&�s�+��
��}�}� r& c � � dj t | j � � D �cg c] }dt |� z �� c}� S c c}w )z�Return the **printable** MAC tag of the message authenticated so far.
:return: The MAC tag, computed over the data processed so far.
Hexadecimal encoded.
:rtype: string
� z%02x)�join�tupler0 r )r �xs r$ � hexdigestzPoly1305_MAC.hexdigest� sD � � �w�w�!&�t�{�{�}�!5�7� � ��a��(� 7� 8� 8�� 7s �Ac �� � t d� }t j d||�� }t j d|| j � �� }|j � |j � k7 r t d� �y)ah Verify that a given **binary** MAC (computed by another party)
is valid.
Args:
mac_tag (byte string/byte string/memoryview): the expected MAC of the message.
Raises:
ValueError: if the MAC does not match. It means that the message
has been tampered with or that the MAC key is incorrect.
r � )� digest_bits�keyr! zMAC check failedN)r r �newr0 r )r �mac_tag�secret�mac1�mac2s r$ �verifyzPoly1305_MAC.verify� s] � � "�"�%���{�{�s��W�E���{�{�s��T�[�[�]�K�� �;�;�=�D�K�K�M� )� � /�0� 0� *r& c �J � | j t t |� � � y)a~ Verify that a given **printable** MAC (computed by another party)
is valid.
Args:
hex_mac_tag (string): the expected MAC of the message,
as a hexadecimal string.
Raises:
ValueError: if the MAC does not match. It means that the message
has been tampered with or that the MAC key is incorrect.
N)r@ r r )r � hex_mac_tags r$ � hexverifyzPoly1305_MAC.hexverify� s � �
� � �I�g�k� 2�3�4r& N) �__name__�
__module__� __qualname__�__doc__� digest_sizer% r r, r0 r6 r@ rC � r& r$ r r 5 s1 � �� �K� �.�"$� �, 8�1�(
5r& r c �z � | j dd� }t |d� s t d� �| j dd� }|� t d� �| j dd� }| j dd� }| rt d t | � z � �|j ||� \ }}}t
|||� }t dd|� |_ |S )
a� Create a new Poly1305 MAC object.
Args:
key (bytes/bytearray/memoryview):
The 32-byte key for the Poly1305 object.
cipher (module from ``Cryptodome.Cipher``):
The cipher algorithm to use for deriving the Poly1305
key pair *(r, s)*.
It can only be ``Cryptodome.Cipher.AES`` or ``Cryptodome.Cipher.ChaCha20``.
nonce (bytes/bytearray/memoryview):
Optional. The non-repeatable value to use for the MAC of this message.
It must be 16 bytes long for ``AES`` and 8 or 12 bytes for ``ChaCha20``.
If not passed, a random nonce is created; you will find it in the
``nonce`` attribute of the new object.
data (bytes/bytearray/memoryview):
Optional. The very first chunk of the message to authenticate.
It is equivalent to an early call to ``update()``.
Returns:
A :class:`Poly1305_MAC` object
�cipherN�_derive_Poly1305_key_pairz*Parameter 'cipher' must be AES or ChaCha20r: z You must pass a parameter 'key'�noncer! zUnknown parameters: ) �pop�hasattrr r( �strrL r r rM )�kwargsrK �
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