# The MIT License (MIT)
#
# Copyright shifvb 2015
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in all
# copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
# SOFTWARE.


def encrypt(plain_data: bytes):
    '''
    Encrypt data by simply alter bytes
    :param plain_data: plain bytes
    :return: encrypted bytes
    '''
    b = bytearray(plain_data)
    for i in range(len(b)):
        if b[i] < 255:
            b[i] += 1
        else:
            b[i] = 0
    return bytes(b)


def test():
    import os
    import sys
    sys.path.append(os.path.join(os.path.dirname(__file__), '../'))
    from http_proxy.lib.decrypt import decrypt

    b = bytes(range(0, 256))
    assert b == decrypt(encrypt(b))
    for d in b:
        print(d,  end=' ')

if __name__ == '__main__':
    test()

# The MIT License (MIT)
#
# Copyright shifvb 2015
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in all
# copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
# SOFTWARE.


def encrypt(plain_data: bytes):
    '''
    Encrypt data by simply alter bytes
    :param plain_data: plain bytes
    :return: encrypted bytes
    '''
    b = bytearray(plain_data)
    for i in range(len(b)):
        if b[i] < 255:
            b[i] += 1
        else:
            b[i] = 0
    return bytes(b)

fix import path and remove test function in encrypt.py