Re: Community Suggestions on Encryption
Re: Community Suggestions on Encryption
- Subject: Re: Community Suggestions on Encryption
- From: Jean-Daniel Dupas <email@hidden>
- Date: Tue, 15 Feb 2011 16:52:39 +0100
Le 15 févr. 2011 à 16:35, Brad Stone a écrit :
> I've been doing a lot of hunting to find a simple way for me to encrypt an NSString and NSData. I've found a bunch of useful blogs like Cocoa Nut (http://cocoa-nut.de/?tag=encryption, Deusty:Using OpenSSL in Cocoa (http://deusty.blogspot.com/2007/01/using-openssl-in-cocoa.html) and the SSCrypto site (http://septicus.com/products/opensource/). The thing is however that these, among others I've found (like "cocoa-ae"s from 2009), are dated. The SSCrypto files haven't been updated since 2006 and these blogs are of similar age.
>
> My question is simple: can I get this done without having to dive deep into the world of OpenSSL? If so, how?
>
> I have about four NSString iVars and one NSData iVar I want to encrypt. I wrote my own test code to encrypt/decrypt an NSString on the fly and have it work with core data transparently to the user. I'm at the point now where I need to replace that test code with something real. From all I've read, OpenSSL is the way to go but I've also read it's very difficult to implement. I know nothing about it. What initially attracted me to SSCrypto is that it's simple (i.e. NSData *decryptedText = [crypto decrypt:@"aes256"]) but I'm worried about using something relatively old and using a third party framework.
>
For AES (and SHA, and HMAC), use CommonCrypto API which is part of libSystem.
man CCCryptor for details. (or search in Xcode doc).
-- Jean-Daniel
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