Classe « BlockAlgo »

Méthode Crypto.Cipher.blockalgo.BlockAlgo.decrypt

Signature de la méthode decrypt

def decrypt(self, ciphertext) 

Description

decrypt.__doc__

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*).