#!/usr/bin/env python
#
# Public Domain 2014-2016 MongoDB, Inc.
# Public Domain 2008-2014 WiredTiger, Inc.
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# This is free and unencumbered software released into the public domain.
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# test_encrypt07.py
#   Salvage encrypted databases
#

import os, run, string, codecs
import wiredtiger, wttest
from wtscenario import multiply_scenarios, number_scenarios
import test_salvage

# Run the regular salvage test, but with encryption on
class test_encrypt07(test_salvage.test_salvage):

    uri='table:test_encrypt07'
    sys_encrypt='rotn'
    sys_encrypt_args=',keyid=13'      # This is rot13

    nrecords = 5000
    bigvalue = "abcdefghij" * 1007    # len(bigvalue) = 10070

    # Override WiredTigerTestCase, we have extensions.
    def setUpConnectionOpen(self, dir):
        encarg = 'encryption=(name={0}{1}),'.format(
            self.sys_encrypt, self.sys_encrypt_args)
        extarg = self.extensionArg([('encryptors', self.sys_encrypt)])
        conn = self.wiredtiger_open(dir,
               'create,error_prefix="{0}: ",{1}{2}'.format(
                self.shortid(), encarg, extarg))
        self.pr(`conn`)
        return conn

    # Return the wiredtiger_open extension argument for a shared library.
    def extensionArg(self, exts):
        extfiles = []
        for ext in exts:
            (dirname, name) = ext
            if name != None and name != 'none':
                testdir = os.path.dirname(__file__)
                extdir = os.path.join(run.wt_builddir, 'ext', dirname)
                extfile = os.path.join(
                    extdir, name, '.libs', 'libwiredtiger_' + name + '.so')
                if not os.path.exists(extfile):
                    self.skipTest('extension "' + extfile + '" not built')
                if not extfile in extfiles:
                    extfiles.append(extfile)
        if len(extfiles) == 0:
            return ''
        else:
            return ',extensions=["' + '","'.join(extfiles) + '"]'

    def rot13(self, s):
        return codecs.encode(s, 'rot_13')

    # overrides test_salvage.damage.
    # When we're looking in the file for our 'unique' set of bytes,
    # (to find a physical spot to damage) we'll need to search for
    # the rot13 encrypted string.
    def damage(self, tablename):
        self.damage_inner(tablename, self.rot13(self.unique))

if __name__ == '__main__':
    wttest.run()