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notes about implementation of rekey functionality

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Stephen Lombardo 2008-08-04 14:25:45 -04:00
parent 211a71ea9c
commit 694dfbb47b
1 changed files with 18 additions and 1 deletions
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19
src/crypto.c
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@ -266,8 +266,25 @@ int sqlite3_key(sqlite3 *db, const void *pKey, int nKey) {
}
}
/* FIXME - this should change the password for the database! */
/* sqlite3_rekey
** Given a database, this will reencrypt the database using a new key.
** There are two possible modes of operation. The first is rekeying
** an existing database that was not previously encrypted. The second
** is to change the key on an existing database.
**
** The proposed logic for this function follows:
** 1. Determine if there is already a key present
** 2. If there is NOT already a key present, create one and attach a codec (key would be null)
** 3. Initialize a ctx->new_key parameter of the codec
** 3. Create a transaction on the database
** 4. Iterate through each page, reading it and then writing it.
** 5. If that goes ok then commit and put ctx->new_key into ctx->key
**
** Note: this will require modifications to the sqlite3Codec to support new_key
**
*/
int sqlite3_rekey(sqlite3 *db, const void *pKey, int nKey) {
/* FIXME - this should change the password for the database! */
printf("sorry sqlite3_rekey is not implemented yet\n");
sqlite3_key(db, pKey, nKey);
}