我看到了以下页面,并且我知道我应该执行查询“ PRAGMA cipher_migrate”。
https://www.zetetic.net/sqlcipher/sqlcipher-api/#cipher_migrate
但是我不知道如何在FMDatabase上使用它。以下代码不起作用...
(似乎不仅执行时间错了...)
如果您尝试使用FMDatabase将SQLCipher ver.2.x DB迁移到ver.3.x,请让我知道您的解决方法。
- (FMDatabase *)openDB {
NSArray *directories = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *directory = [directories objectAtIndex:0];
NSString *path = [directory stringByAppendingPathComponent:dbFileName];
FMDatabase *dataBase = [FMDatabase databaseWithPath:path];
NSUserDefaults *userDefault = [NSUserDefaults standardUserDefaults];
int version = [userDefault integerForKey:DATABASE_TABLE_VERSION];
if(version==1){
if(![dataBase openWithFlags:SQLITE_OPEN_READWRITE]){
@throw [NSException exceptionWithName:@"DBException"
reason:@"openWithFlags"
userInfo:nil];
}
if(![dataBase setKey:SQLCIPHER_KEY]){
@throw [NSException exceptionWithName:@"DBException"
reason:@"setKey"
userInfo:nil];
}
if(![dataBase executeStatements:@"PRAGMA kdf_iter = 4000"]){
@throw [NSException exceptionWithName:@"DBException"
reason:@"executeStatements:kdf_iter"
userInfo:nil];
}
[userDefault setInteger:2 forKey:DATABASE_TABLE_VERSION];
[userDefault synchronize];
return dataBase;
}
if(![dataBase open]){
@throw [NSException exceptionWithName:@"DBException"
reason:@"open"
userInfo:nil];
}
if(![dataBase setKey:SQLCIPHER_KEY]){
@throw [NSException exceptionWithName:@"DBException"
reason:@"setKey"
userInfo:nil];
}
return dataBase;
}
- (NSMutableArray *)selectUser{
FMDatabase *dataBase = [self openDB];
NSString *sql = @"select * from t_user";
FMResultSet *resultSet = [dataBase executeQuery:sql];
NSMutableArray *mutableArray = [NSMutableArray arrayWithObjects: nil];
while ([resultSet next]){
[mutableArray addObject:[resultSet resultDictionary]];
}
[resultSet close];
[dataBase close];
return mutableArray;
}
最佳答案
我认为您需要在连接之后和任何执行之前设置密码密钥。
另外,如果您使用
PRAGMA kdf_iter = 4000
你不需要用
PRAGMA cipher_migrate
关于ios - 迁移SQLCipher版本。 2.x DB到ver。 FMDB使用的3.x,我们在Stack Overflow上找到一个类似的问题:https://stackoverflow.com/questions/27036546/