python-pskc branch master updated. 0.2-9-gebe46f2

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http://arthurdejong.org/git/python-pskc/commit/?id=ebe46f2e9cd2a43a50e153d29e48a0b7ac82c88c

commit ebe46f2e9cd2a43a50e153d29e48a0b7ac82c88c
Author: Arthur de Jong <arthur@arthurdejong.org>
Date:   Sun Oct 12 21:24:58 2014 +0200

    Provide a sample pskc2csv script
    
    This is a simple command-line utility that reads a PSKC file and outputs
    information on keys as CSV.

diff --git a/pskc2csv.py b/pskc2csv.py
new file mode 100755
index 0000000..6276369
--- /dev/null
+++ b/pskc2csv.py
@@ -0,0 +1,127 @@
+#!/usr/bin/env python
+# coding: utf-8
+
+# pskc2csv.py - script to convert a PSKC file to CSV
+#
+# Copyright (C) 2014 Arthur de Jong
+#
+# This library 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.
+#
+# This library 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 this library; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+# 02110-1301 USA
+
+import argparse
+import csv
+import operator
+import sys
+import getpass
+from binascii import b2a_hex
+
+import pskc
+from pskc.exceptions import DecryptionError
+
+
+version_string = '''
+pskc2csv (python-pskc) %s
+Written by Arthur de Jong.
+
+Copyright (C) 2014 Arthur de Jong
+This is free software; see the source for copying conditions.  There is NO
+warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+'''.strip() % pskc.__version__
+
+
+class VersionAction(argparse.Action):
+
+    def __init__(self, option_strings, dest,
+                 help='output version information and exit'):
+        super(VersionAction, self).__init__(
+            option_strings=option_strings,
+            dest=argparse.SUPPRESS,
+            default=argparse.SUPPRESS,
+            nargs=0,
+            help=help)
+
+    def __call__(self, parser, namespace, values, option_string=None):
+        print version_string
+        parser.exit()
+
+epilog = '''
+supported columns:
+  id, serial, secret, counter, time_offset, time_interval, interval,
+  time_drift, issuer, manufacturer, response_length, algorithm
+And any other properties of pskc.key.Key instances.
+
+Report bugs to <python-pskc-users@lists.arthurdejong.org>.
+'''.strip()
+
+# set up command line parser
+parser = argparse.ArgumentParser(
+    formatter_class=argparse.RawDescriptionHelpFormatter,
+    description='Convert a PSKC file to CSV.', epilog=epilog)
+parser.add_argument(
+    'input', metavar='FILE', help='the PSKC file to read')
+parser.add_argument(
+    '-V', '--version', action=VersionAction)
+parser.add_argument(
+    '-o', '--output', metavar='FILE',
+    help='write CSV to file instead of stdout')
+parser.add_argument(
+    '-c', '--columns', metavar='COL,COL', type=lambda x: x.split(','),
+    help='list of columns to export',
+    default='serial,secret,algorithm,response_length,time_interval')
+
+
+def password_prompt(pskcfile):
+    """Prompt for a password and use the password to decrypt."""
+    prompt = 'Password: '
+    if pskcfile.encryption.key_name:
+        prompt = '%s: ' % pskcfile.encryption.key_name
+    passwd = getpass.getpass(prompt)
+    pskcfile.encryption.derive_key(passwd)
+
+
+def get_column(key, column):
+    """Return a string value for the given column."""
+    value = operator.attrgetter(column)(key)
+    if column == 'secret':
+        return b2a_hex(value)
+    return value
+
+
+def is_encrypted(pskcfile):
+    """Check whether the PSKC file is encrypted."""
+    try:
+        pskcfile.keys[0].secret
+    except DecryptionError:
+        return True
+    except IndexError:
+        pass
+    return False
+
+
+if __name__ == '__main__':
+    # parse command-line arguments
+    args = parser.parse_args()
+    # open and parse input PSKC file
+    pskcfile = pskc.PSKC(args.input)
+    # see if we should prompt for a password
+    if sys.stdin.isatty() and is_encrypted(pskcfile):
+        password_prompt(pskcfile)
+    # open output CSV file, write header and keys
+    with open(args.output, 'wb') if args.output else sys.stdout as output:
+        csvfile = csv.writer(output, quoting=csv.QUOTE_MINIMAL)
+        csvfile.writerow(args.columns)
+        for key in pskcfile.keys:
+            csvfile.writerow([
+                get_column(key, column) for column in args.columns])

-----------------------------------------------------------------------

Summary of changes:
 pskc2csv.py |  127 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 127 insertions(+)
 create mode 100755 pskc2csv.py


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