RNCryptor "encryptData" returning null

Question

New to iOS dev, trying to work on encoding data for secure data storage in db.

I found the current example here: https://github.com/RNCryptor/RNCryptor-objc

This is my code.

NSString * aPassword =@"tempkey";

NSData *data = [@"Data" dataUsingEncoding:NSUTF8StringEncoding];
NSError *error;
NSData *encryptedData = [RNEncryptor encryptData:data
                                    withSettings:kRNCryptorAES256Settings
                                        password:aPassword
                                           error:&error];


NSLog(@"Data: %@", [[NSString alloc] initWithData:encryptedData encoding:NSUTF8StringEncoding]);

My log

2016-10-20 11:41:52.662 BlueBoard[57245:10027277] Data: (null)

Am I missing a step in this process? I've confirmed that it's null because it the db its being stored as null as well.

Answer 1

Your issue isn't that encryptedData is nil, it's that you are attempted to create an NSString from data that doesn't represent a string.

If you wish to convert encryptedData into a string for storage or other purposes, you should convert the data into a Base 64 encoded representation. Do this with the base64EncodedStringWithOptions: method.

NSString *base64String = [encryptedData base64EncodedStringWithOptions:0];

Of course when you want to decrypt the string later, you will need to convert the Base 64 encoded string back into NSData, and then decrypt that data.