oss2/crypto.py [197:215]:
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    def create_content_material(self):
        plain_key = self.get_key()
        encrypted_key = self.__encrypt_data(plain_key)
        plain_iv = self.get_iv()
        encrypted_iv = self.__encrypt_data(plain_iv)
        cipher = copy.copy(self.cipher)
        wrap_alg = self.wrap_alg
        mat_desc = self.mat_desc

        cipher.initialize(plain_key, plain_iv)

        content_crypto_material = models.ContentCryptoMaterial(cipher, wrap_alg, encrypted_key, encrypted_iv,
                                                               mat_desc)
        return content_crypto_material

    def __encrypt_data(self, data):
        return self.__encrypt_obj.encrypt(data)

    def __decrypt_data(self, data):
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oss2/crypto.py [265:283]:
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    def create_content_material(self):
        plain_key = self.get_key()
        encrypted_key = self.__encrypt_data(plain_key)
        plain_iv = self.get_iv()
        encrypted_iv = self.__encrypt_data(plain_iv)
        cipher = copy.copy(self.cipher)
        wrap_alg = self.wrap_alg
        mat_desc = self.mat_desc

        cipher.initialize(plain_key, plain_iv)

        content_crypto_material = models.ContentCryptoMaterial(cipher, wrap_alg, encrypted_key, encrypted_iv,
                                                               mat_desc)
        return content_crypto_material

    def __encrypt_data(self, data):
        return self.__encrypt_obj.encrypt(data)

    def __decrypt_data(self, data):
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