Python get_blocks Exemples

Exemple #1

Fichier : CBC_MAC.py Projet : suspectpart/crypto

	def sign(self, message):
		message = mac_pad(message, self.BLOCK_SIZE)	
		tag = b'\x00' * self.BLOCK_SIZE

		for block in get_blocks(message, self.BLOCK_SIZE):
			tag = self.cipher1.encrypt(xor(block, tag))

		return self.cipher2.encrypt(tag)

Exemple #2

Fichier : CMAC.py Projet : suspectpart/crypto

	def sign(self, message):
		last_block_key = self.k2 if len(message) % self.BLOCK_SIZE == 0 else self.k1
		if last_block_key == self.k1:
			message = mac_pad(message, self.BLOCK_SIZE)

		tag = b'\x00' * self.BLOCK_SIZE

		for block in get_blocks(message[:-self.BLOCK_SIZE], self.BLOCK_SIZE):
			tag = self.cipher.encrypt(xor(block, tag))

		last_block = message[-self.BLOCK_SIZE:]
		return self.cipher.encrypt(xor(last_block_key, xor(last_block, tag)))