#!/usr/bin/env python
#
# Public Domain 2014-2015 MongoDB, Inc.
# Public Domain 2008-2014 WiredTiger, Inc.
#
# This is free and unencumbered software released into the public domain.
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# distribute this software, either in source code form or as a compiled
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# of this software dedicate any and all copyright interest in the
# software to the public domain. We make this dedication for the benefit
# of the public at large and to the detriment of our heirs and
# successors. We intend this dedication to be an overt act of
# relinquishment in perpetuity of all present and future rights to this
# software under copyright law.
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# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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#
# test_encrypt01.py
#   Basic block encryption operations
#

import os, run, random
import wiredtiger, wttest
from wtscenario import multiply_scenarios, number_scenarios

# Test basic encryption
class test_encrypt01(wttest.WiredTigerTestCase):

    types = [
        ('file', dict(uri='file:test_encrypt01')),
        ('table', dict(uri='table:test_encrypt01')),
    ]
    encrypt = [
        ('none', dict( sys_encrypt='none', sys_encrypt_args='',
            file_encrypt='none', file_encrypt_args='')),
        ('nop', dict( sys_encrypt='nop', sys_encrypt_args='',
            file_encrypt='nop', file_encrypt_args='')),
        ('rotn', dict( sys_encrypt='rotn', sys_encrypt_args=',keyid=11',
            file_encrypt='rotn', file_encrypt_args=',keyid=13')),
        ('rotn-none', dict( sys_encrypt='rotn', sys_encrypt_args=',keyid=9',
            file_encrypt='none',  file_encrypt_args=''))
    ]
    compress = [
        ('none', dict(log_compress=None, block_compress=None)),
        ('nop', dict(log_compress='nop', block_compress='nop')),
        ('lz4', dict(log_compress='lz4', block_compress='lz4')),
        ('bzip2', dict(log_compress='bzip2', block_compress='bzip2')),
        ('snappy', dict(log_compress='snappy', block_compress='snappy')),
        ('zlib', dict(log_compress='zlib', block_compress='zlib')),
        ('bzip2-none', dict(log_compress='bzip2', block_compress=None)),
        ('none-snappy', dict(log_compress=None, block_compress='snappy')),
        ('snappy-lz4', dict(log_compress='snappy', block_compress='lz4')),
    ]
    scenarios = number_scenarios(multiply_scenarios('.', types,
                                                    encrypt, compress))

    nrecords = 5000
    bigvalue = "abcdefghij" * 1001    # len(bigvalue) = 10010

    # Override WiredTigerTestCase, we have extensions.
    def setUpConnectionOpen(self, dir):
        encarg = 'encryption=(name={0}{1}),'.format(
            self.sys_encrypt, self.sys_encrypt_args)
        comparg = ''
        if self.log_compress != None:
            comparg='log=(compressor={0}),'.format(self.log_compress)
        extarg = self.extensionArg([('encryptors', self.sys_encrypt),
            ('encryptors', self.file_encrypt),
            ('compressors', self.block_compress),
            ('compressors', self.log_compress)])
        conn = wiredtiger.wiredtiger_open(dir,
            'create,error_prefix="{0}: ",{1}{2}{3}'.format(
                self.shortid(), encarg, comparg, 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) + '"]'

    # Create a table, add keys with both big and small values, then verify them.
    def test_encrypt(self):
        params = 'key_format=S,value_format=S'
        if self.file_encrypt != None:
            params += ',encryption=(name=' + self.file_encrypt + \
                      self.file_encrypt_args + ')'
        if self.block_compress != None:
            params += ',block_compressor=' + self.block_compress

        self.session.create(self.uri, params)
        cursor = self.session.open_cursor(self.uri, None)
        r = random.Random()
        r.seed(0)
        for idx in xrange(1,self.nrecords):
            start = r.randint(0,9)
            key = self.bigvalue[start:r.randint(0,100)] + str(idx)
            val = self.bigvalue[start:r.randint(0,10000)] + str(idx)
            cursor.set_key(key)
            cursor.set_value(val)
            cursor.insert()
        cursor.close()

        # Force the cache to disk, so we read
        # compressed/encrypted pages from disk.
        self.reopen_conn()

        cursor = self.session.open_cursor(self.uri, None)
        r.seed(0)
        for idx in xrange(1,self.nrecords):
            start = r.randint(0,9)
            key = self.bigvalue[start:r.randint(0,100)] + str(idx)
            val = self.bigvalue[start:r.randint(0,10000)] + str(idx)
            cursor.set_key(key)
            self.assertEqual(cursor.search(), 0)
            self.assertEquals(cursor.get_value(), val)
        cursor.close()


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