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sqlcipher
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Merge branch 'prerelease' of https://github.com/sqlcipher/sqlcipher into Xcode5

This commit is contained in:
Billy Gray 2013-09-12 15:57:01 -04:00
parent 4093d93e68 9d84aca41d
commit 3019c79930
1 changed files with 16 additions and 9 deletions
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25
src/crypto_impl.c
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@ -906,11 +906,11 @@ const char* sqlcipher_codec_get_cipher_provider(codec_ctx *ctx) {
} }
static int sqlcipher_check_connection(const char *filename, char *key, int key_sz, char *sql) { static int sqlcipher_check_connection(const char *filename, char *key, int key_sz, char *sql, int *user_version) {
int rc; int rc;
sqlite3 *db = NULL; sqlite3 *db = NULL;
sqlite3_stmt *statement = NULL; sqlite3_stmt *statement = NULL;
char *query_sqlite_master = "SELECT count(*) FROM sqlite_master;"; char *query_user_version = "PRAGMA user_version;";
rc = sqlite3_open(filename, &db); rc = sqlite3_open(filename, &db);
if(rc != SQLITE_OK){ if(rc != SQLITE_OK){
@ -924,11 +924,13 @@ static int sqlcipher_check_connection(const char *filename, char *key, int key_s
if(rc != SQLITE_OK){ if(rc != SQLITE_OK){
goto cleanup; goto cleanup;
} }
rc = sqlite3_prepare(db, query_sqlite_master, -1, &statement, NULL); rc = sqlite3_prepare(db, query_user_version, -1, &statement, NULL);
if(rc != SQLITE_OK){ if(rc != SQLITE_OK){
goto cleanup; goto cleanup;
} }
if(sqlite3_step(statement) == SQLITE_ROW){ rc = sqlite3_step(statement);
if(rc == SQLITE_ROW){
*user_version = sqlite3_column_int(statement, 0);
rc = SQLITE_OK; rc = SQLITE_OK;
} }
@ -958,8 +960,10 @@ int sqlcipher_codec_ctx_migrate(codec_ctx *ctx) {
char *pragma_hmac_off = "PRAGMA cipher_use_hmac = OFF;"; char *pragma_hmac_off = "PRAGMA cipher_use_hmac = OFF;";
char *pragma_4k_kdf_iter = "PRAGMA kdf_iter = 4000;"; char *pragma_4k_kdf_iter = "PRAGMA kdf_iter = 4000;";
char *pragma_1x_and_4k; char *pragma_1x_and_4k;
char *set_user_version;
char *key; char *key;
int key_sz; int key_sz;
int user_version = 0;
int upgrade_1x_format = 0; int upgrade_1x_format = 0;
int upgrade_4k_format = 0; int upgrade_4k_format = 0;
static const unsigned char aCopy[] = { static const unsigned char aCopy[] = {
@ -977,18 +981,18 @@ int sqlcipher_codec_ctx_migrate(codec_ctx *ctx) {
memcpy(key, ctx->read_ctx->pass, ctx->read_ctx->pass_sz); memcpy(key, ctx->read_ctx->pass, ctx->read_ctx->pass_sz);
if(db_filename){ if(db_filename){
const char* commands[4]; const char* commands[5];
char *attach_command = sqlite3_mprintf("ATTACH DATABASE '%s-migrated' as migrate KEY '%s';", char *attach_command = sqlite3_mprintf("ATTACH DATABASE '%s-migrated' as migrate KEY '%q';",
db_filename, key); db_filename, key);
int rc = sqlcipher_check_connection(db_filename, key, key_sz, ""); int rc = sqlcipher_check_connection(db_filename, key, key_sz, "", &user_version);
if(rc == SQLITE_OK){ if(rc == SQLITE_OK){
CODEC_TRACE(("No upgrade required - exiting\n")); CODEC_TRACE(("No upgrade required - exiting\n"));
goto exit; goto exit;
} }
// Version 2 - check for 4k with hmac format // Version 2 - check for 4k with hmac format
rc = sqlcipher_check_connection(db_filename, key, key_sz, pragma_4k_kdf_iter); rc = sqlcipher_check_connection(db_filename, key, key_sz, pragma_4k_kdf_iter, &user_version);
if(rc == SQLITE_OK) { if(rc == SQLITE_OK) {
CODEC_TRACE(("Version 2 format found\n")); CODEC_TRACE(("Version 2 format found\n"));
upgrade_4k_format = 1; upgrade_4k_format = 1;
@ -997,7 +1001,7 @@ int sqlcipher_codec_ctx_migrate(codec_ctx *ctx) {
// Version 1 - check both no hmac and 4k together // Version 1 - check both no hmac and 4k together
pragma_1x_and_4k = sqlite3_mprintf("%s%s", pragma_hmac_off, pragma_1x_and_4k = sqlite3_mprintf("%s%s", pragma_hmac_off,
pragma_4k_kdf_iter); pragma_4k_kdf_iter);
rc = sqlcipher_check_connection(db_filename, key, key_sz, pragma_1x_and_4k); rc = sqlcipher_check_connection(db_filename, key, key_sz, pragma_1x_and_4k, &user_version);
sqlite3_free(pragma_1x_and_4k); sqlite3_free(pragma_1x_and_4k);
if(rc == SQLITE_OK) { if(rc == SQLITE_OK) {
CODEC_TRACE(("Version 1 format found\n")); CODEC_TRACE(("Version 1 format found\n"));
@ -1010,10 +1014,12 @@ int sqlcipher_codec_ctx_migrate(codec_ctx *ctx) {
goto handle_error; goto handle_error;
} }
set_user_version = sqlite3_mprintf("PRAGMA migrate.user_version = %d;", user_version);
commands[0] = upgrade_4k_format == 1 ? pragma_4k_kdf_iter : ""; commands[0] = upgrade_4k_format == 1 ? pragma_4k_kdf_iter : "";
commands[1] = upgrade_1x_format == 1 ? pragma_hmac_off : ""; commands[1] = upgrade_1x_format == 1 ? pragma_hmac_off : "";
commands[2] = attach_command; commands[2] = attach_command;
commands[3] = "SELECT sqlcipher_export('migrate');"; commands[3] = "SELECT sqlcipher_export('migrate');";
commands[4] = set_user_version;
for(command_idx = 0; command_idx < ArraySize(commands); command_idx++){ for(command_idx = 0; command_idx < ArraySize(commands); command_idx++){
const char *command = commands[command_idx]; const char *command = commands[command_idx];
@ -1026,6 +1032,7 @@ int sqlcipher_codec_ctx_migrate(codec_ctx *ctx) {
} }
} }
sqlite3_free(attach_command); sqlite3_free(attach_command);
sqlite3_free(set_user_version);
sqlcipher_free(key, key_sz); sqlcipher_free(key, key_sz);
if(rc == SQLITE_OK){ if(rc == SQLITE_OK){