Esempio n. 1
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 def _decrypt(self, stream):
     super(KDB3File, self)._decrypt(stream)
     
     data = aes_cbc_decrypt(stream.read(), self.master_key, 
         self.header.EncryptionIV)
     data = unpad(data)
     
     if self.header.ContentHash == sha256(data):
         # put data in bytes io
         self.in_buffer = io.BytesIO(data)
         # set successful decryption flag
         self.opened = True
     else:
         raise IOError('Master key invalid.')
Esempio n. 2
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    def _decrypt(self, stream):
        super(KDB3File, self)._decrypt(stream)

        data = aes_cbc_decrypt(stream.read(), self.master_key,
                               self.header.EncryptionIV)
        data = unpad(data)

        if self.header.ContentHash == sha256(data):
            # put data in bytes io
            self.in_buffer = io.BytesIO(data)
            # set successful decryption flag
            self.opened = True
        else:
            raise IOError('Master key invalid.')
Esempio n. 3
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    def _decrypt(self, stream):
        """
        Build the master key from header settings and key-hash list.
        
        Start reading from `stream` after the header and decrypt all the data.
        Remove padding as needed and feed into hashed block reader, set as
        in-buffer.
        """
        super(KDB4File, self)._decrypt(stream)

        data = aes_cbc_decrypt(stream.read(), self.master_key,
                               self.header.EncryptionIV)
        data = unpad(data)

        length = len(self.header.StreamStartBytes)
        if self.header.StreamStartBytes == data[:length]:
            # skip startbytes and wrap data in a hashed block io
            self.in_buffer = HashedBlockIO(bytes=data[length:])
            # set successful decryption flag
            self.opened = True
        else:
            raise IOError('Master key invalid.')
Esempio n. 4
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    def _decrypt(self, stream):
        """
        Build the master key from header settings and key-hash list.

        Start reading from `stream` after the header and decrypt all the data.
        Remove padding as needed and feed into hashed block reader, set as
        in-buffer.
        """
        super(KDB4File, self)._decrypt(stream)

        data = aes_cbc_decrypt(stream.read(), self.master_key,
            self.header.EncryptionIV)
        data = unpad(data)

        length = len(self.header.StreamStartBytes)
        if self.header.StreamStartBytes == data[:length]:
            # skip startbytes and wrap data in a hashed block io
            self.in_buffer = HashedBlockIO(bytes=data[length:])
            # set successful decryption flag
            self.opened = True
        else:
            raise IOError('Master key invalid.')