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"""smartcard.guid

Utility functions to handle GUIDs as strings or list of bytes

__author__ = "http://www.gemalto.com"

Copyright 2001-2012 gemalto
Author: Jean-Daniel Aussel, mailto:jean-daniel.aussel@gemalto.com

This file is part of pyscard.

pyscard is free software; you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 2.1 of the License, or
(at your option) any later version.

pyscard is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU Lesser General Public License for more details.

You should have received a copy of the GNU Lesser General Public License
along with pyscard; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
"""
from __future__ import print_function
import uuid

# guid is ulong+ushort+ushort+uchar[8]


def strToGUID(s):
    """Converts a GUID string into a list of bytes.

    >>> strToGUID('{AD4F1667-EA75-4124-84D4-641B3B197C65}')
    [103, 22, 79, 173, 117, 234, 36, 65, 132, 212, 100, 27, 59, 25, 124, 101]
    """
    dat = uuid.UUID(hex=s)
    if isinstance(dat.bytes_le, str):
        # Python 2
        dat = [ord(e) for e in dat.bytes_le]
    else:
        # Python 3
        dat = list(dat.bytes_le)
    return dat


def GUIDToStr(g):
    """Converts a GUID sequence of bytes into a string.

    >>> GUIDToStr([103,22,79,173,  117,234,  36,65,
    ...            132, 212, 100, 27, 59, 25, 124, 101])
    '{AD4F1667-EA75-4124-84D4-641B3B197C65}'
    """
    try:
        dat = uuid.UUID(bytes_le=bytes(g))
    except:
        dat = uuid.UUID(bytes_le=''.join(map(chr, g)))
    return '{' + str(dat).upper() + '}'


if __name__ == "__main__":
    """Small sample illustrating the use of guid.py."""
    guid_in = '{AD4F1667-EA75-4124-84D4-641B3B197C65}'
    print(guid_in)
    dummycardguid1 = strToGUID(guid_in)
    print(dummycardguid1)
    guid_out = GUIDToStr(dummycardguid1)
    print(guid_out)
    if guid_in != guid_out:
        print("Failure")
    else:
        print("Success")