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d d � � YZ d S( s4 Module with definitions common to all block ciphers.i����Ni i i ( t *i i i i i c C sQ | j | � } t | � | k rG | r: t d | � � n | | } n | pP | S( sF Find a parameter in tuple and dictionary arguments a function receivess! Parameter '%s' is specified twice( t gett lent
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n | S| j j | � S( sX Encrypt data with the key and the parameters set at initialization.
The cipher object is stateful; encryption of a long block
of data can be broken up in two or more calls to `encrypt()`.
That is, the statement:
>>> c.encrypt(a) + c.encrypt(b)
is always equivalent to:
>>> c.encrypt(a+b)
That also means that you cannot reuse an object for encrypting
or decrypting other data with the same key.
This function does not perform any padding.
- For `MODE_ECB`, `MODE_CBC`, and `MODE_OFB`, *plaintext* length
(in bytes) must be a multiple of *block_size*.
- For `MODE_CFB`, *plaintext* length (in bytes) must be a multiple
of *segment_size*/8.
- For `MODE_CTR`, *plaintext* can be of any length.
- For `MODE_OPENPGP`, *plaintext* must be a multiple of *block_size*,
unless it is the last chunk of the message.
:Parameters:
plaintext : byte string
The piece of data to encrypt.
:Return:
the encrypted data, as a byte string. It is as long as
*plaintext* with one exception: when encrypting the first message
chunk with `MODE_OPENPGP`, the encypted IV is prepended to the
returned ciphertext.
i sF Only the last chunk is allowed to have length not multiple of %d bytesR ( R R R R R R t TrueR R R R R ( R t plaintextt padding_lengtht paddedt res( ( s= /usr/lib64/python2.7/site-packages/Crypto/Cipher/blockalgo.pyR � s '!
c C s� | j t k r� | j t | � | j | j } | d k r� | j rZ t d | j � � n t | _ | t d � | } | j j | � t | � } n | j j | � } | S| j j | � S( s� Decrypt data with the key and the parameters set at initialization.
The cipher object is stateful; decryption of a long block
of data can be broken up in two or more calls to `decrypt()`.
That is, the statement:
>>> c.decrypt(a) + c.decrypt(b)
is always equivalent to:
>>> c.decrypt(a+b)
That also means that you cannot reuse an object for encrypting
or decrypting other data with the same key.
This function does not perform any padding.
- For `MODE_ECB`, `MODE_CBC`, and `MODE_OFB`, *ciphertext* length
(in bytes) must be a multiple of *block_size*.
- For `MODE_CFB`, *ciphertext* length (in bytes) must be a multiple
of *segment_size*/8.
- For `MODE_CTR`, *ciphertext* can be of any length.
- For `MODE_OPENPGP`, *plaintext* must be a multiple of *block_size*,
unless it is the last chunk of the message.
:Parameters:
ciphertext : byte string
The piece of data to decrypt.
:Return: the decrypted data (byte string, as long as *ciphertext*).
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ciphertextR% R& R' ( ( s= /usr/lib64/python2.7/site-packages/Crypto/Cipher/blockalgo.pyR � s "! ( t __name__t
__module__t __doc__R" R R ( ( ( s= /usr/lib64/python2.7/site-packages/Crypto/Cipher/blockalgo.pyR � s 3 ;( ( R+ t syst version_infot Crypto.Util.py21compatt Crypto.Util.py3compatR t MODE_CBCR t MODE_PGPt MODE_OFBt MODE_CTRR t NoneR
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