Source code for mindarmour.attacks.attack

# Copyright 2019 Huawei Technologies Co., Ltd
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
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"""
Base Class of Attack.
"""
from abc import abstractmethod

import numpy as np

from mindarmour.utils._check_param import check_pair_numpy_param, \
    check_int_positive
from mindarmour.utils.logger import LogUtil

LOGGER = LogUtil.get_instance()
TAG = 'Attack'


[docs]class Attack: """ The abstract base class for all attack classes creating adversarial examples. """ def __init__(self): pass
[docs] def batch_generate(self, inputs, labels, batch_size=64): """ Generate adversarial examples in batch, based on input samples and their labels. Args: inputs (numpy.ndarray): Samples based on which adversarial examples are generated. labels (numpy.ndarray): Labels of samples, whose values determined by specific attacks. batch_size (int): The number of samples in one batch. Returns: numpy.ndarray, generated adversarial examples Examples: >>> inputs = np.array([[0.2, 0.4, 0.5, 0.2], [0.7, 0.2, 0.4, 0.3]]) >>> labels = np.array([3, 0]) >>> advs = attack.batch_generate(inputs, labels, batch_size=2) """ arr_x, arr_y = check_pair_numpy_param('inputs', inputs, 'labels', labels) len_x = arr_x.shape[0] batch_size = check_int_positive('batch_size', batch_size) batchs = int(len_x / batch_size) rest = len_x - batchs*batch_size res = [] for i in range(batchs): x_batch = arr_x[i*batch_size: (i + 1)*batch_size] y_batch = arr_y[i*batch_size: (i + 1)*batch_size] adv_x = self.generate(x_batch, y_batch) # Black-attack methods will return 3 values, just get the second. res.append(adv_x[1] if isinstance(adv_x, tuple) else adv_x) if rest != 0: x_batch = arr_x[batchs*batch_size:] y_batch = arr_y[batchs*batch_size:] adv_x = self.generate(x_batch, y_batch) # Black-attack methods will return 3 values, just get the second. res.append(adv_x[1] if isinstance(adv_x, tuple) else adv_x) adv_x = np.concatenate(res, axis=0) return adv_x
[docs] @abstractmethod def generate(self, inputs, labels): """ Generate adversarial examples based on normal samples and their labels. Args: inputs (numpy.ndarray): Samples based on which adversarial examples are generated. labels (numpy.ndarray): Labels of samples, whose values determined by specific attacks. Raises: NotImplementedError: It is an abstract method. """ msg = 'The function generate() is an abstract function in class ' \ '`Attack` and should be implemented in child class.' LOGGER.error(TAG, msg) raise NotImplementedError(msg)