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enable secure delete on all encrypted databases

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This commit is contained in:
Stephen Lombardo 2012-05-18 02:22:40 -04:00
parent 0e8cdf4b25
commit c2f7cd7926
2 changed files with 9 additions and 2 deletions
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5
src/crypto.c
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@ -239,6 +239,11 @@ int sqlite3CodecAttach(sqlite3* db, int nDb, const void *zKey, int nKey) {
codec_set_btree_to_codec_pagesize(db, pDb, ctx); codec_set_btree_to_codec_pagesize(db, pDb, ctx);
/* force secure delete. This has the benefit of wiping internal data when deleted
and also ensures that all pages are written to disk (i.e. not skipped by
sqlite3PagerDontWrite optimizations) */
sqlite3BtreeSecureDelete(pDb->pBt, 1);
/* if fd is null, then this is an in-memory database and /* if fd is null, then this is an in-memory database and
we dont' want to overwrite the AutoVacuum settings we dont' want to overwrite the AutoVacuum settings
if not null, then set to the default */ if not null, then set to the default */

6
test/crypto.test
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@ -271,7 +271,9 @@ file delete -force test.db
# delete another 50% # delete another 50%
# then rekey it. Make sure it is immediately # then rekey it. Make sure it is immediately
# readable. Then close it and make sure it can be # readable. Then close it and make sure it can be
# read back # read back. This test will ensure that Secure Delete
# is enabled and all pages are being written and are not
# being optimized out by sqlite3PagerDontWrite
do_test rekey-delete-and-query-1 { do_test rekey-delete-and-query-1 {
sqlite_orig db test.db sqlite_orig db test.db
@ -311,7 +313,7 @@ do_test rekey-delete-and-query-1 {
PRAGMA rekey = 'test321'; PRAGMA rekey = 'test321';
SELECT count(*) > 1 FROM t1; SELECT count(*) > 1 FROM t1;
} }
} {} } {1}
db close db close
file delete -force test.db file delete -force test.db