coretex.cryptography.aes.decryptor.StreamDecryptor Class Reference

Public Member Functions
Generator[bytes, None, None]	feed (self, bytes data)
bytes	flush (self)

Detailed Description

    Implements functionality for decrypting a stream of bytes
    using AES 256.

Definition at line 28 of file decryptor.py.

Member Function Documentation

feed()

Generator[bytes, None, None] coretex.cryptography.aes.decryptor.StreamDecryptor.feed	(		self,
		bytes	data
	)

    Decrypts the data using AES 256.

    Parameters
    ----------
    data : bytes
        data which should be decrypted

    Returns
    -------
    Generator[bytes, None, None] -> yields decrypted data in chunks

Definition at line 49 of file decryptor.py.

    def feed(self, data: bytes) -> Generator[bytes, None, None]:
        """
            Decrypts the data using AES 256.
 
            Parameters
            ----------
            data : bytes
                data which should be decrypted
 
            Returns
            -------
            Generator[bytes, None, None] -> yields decrypted data in chunks
        """
 
        self._buffer.append(data)
 
        while self._buffer.remaining >= self.chunkSize:
            chunk = self._buffer.getBytes(self.chunkSize)
            yield self._decryptor.update(chunk)
 

flush()

bytes coretex.cryptography.aes.decryptor.StreamDecryptor.flush

(

self

)

    Decrypts any remaining data using AES 256.

    Returns
    -------
    bytes -> decrypted data

Definition at line 69 of file decryptor.py.

    def flush(self) -> bytes:
        """
            Decrypts any remaining data using AES 256.
 
            Returns
            -------
            bytes -> decrypted data
        """
 
        # Decrypt chunk
        chunk = self._buffer.getRemaining()
        chunk = self._decryptor.update(chunk) + self._decryptor.finalize()
 
        # Unpad chunk
        try:
            unpadder = padding.PKCS7(AES_BLOCK_SIZE * 8).unpadder()
            return unpadder.update(chunk) + unpadder.finalize()
        except ValueError:
            # If unpadding failed either the key is wrong or
            # the padding was not performed during encryption
            # because ciphertext bytes were divisible by AES
            # block size so there was no need for padding
            return chunk
 
 

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The documentation for this class was generated from the following file:

• coretex/cryptography/aes/decryptor.py