TSS hashing on Python

tss_hash.py

import os
from ctypes import cdll, create_string_buffer
import binascii
import logging

logger = logging.getLogger()

TSS_HASH_SHA1 = 0x00000001

def main():
    try:
        if os.name == "posix":
            tspi_lib = cdll.LoadLibrary("libtspi.so.1")
        elif os.name == "nt":
            tspi_lib = cdll.LoadLibrary("TSS.NET.dll")
    except OSError, e:
        logging.error('Error loading C library: \n%r' %
            (e))
        raise SystemExit(1)

    str = "The quick brown fox jumps over the lazy dog"
    digest = create_string_buffer(20)

    result = tspi_lib.Trspi_Hash(TSS_HASH_SHA1, len(str), str, digest)

    print('Hash=' + binascii.hexlify(digest.raw))

if __name__ == "__main__":
    main()