[aerogear-dev] Queries on "AeroGear-Crypto-iOS" Library

[Corinne Krych]

On 21 Feb 2014, at 13:35, Saravanan V <saru2020 at gmail.com> wrote:

> 
> 
> 
> Thanks & Regards,.
> Saravanan V
> 
> 
> On Fri, Feb 21, 2014 at 4:53 PM, Corinne Krych <corinnekrych at gmail.com> wrote:
> 
> On 21 Feb 2014, at 10:42, Saravanan V <saru2020 at gmail.com> wrote:
> 
> > Hello Everyone,
> >
> > I just viewed the AeroGear-Crypto-iOS Library here :
> > https://github.com/aerogear/aerogear-crypto-ios
> >
> > Can someone answer few of my questions:
> > * What is the Algorithm being used for Encryption/Decryption?
> 
> For symmetric we currently use common crypto and CBC mode  (see http://aerogear.org/docs/guides/iOSCookbook/#crypto)
> but we plan for the next release to go with NaCi lib (for a broader range of algorithms - GCM )
> 
> --> The GitHub sample does provide Asymmetric example. 
> So, what is the Algorithm used for Asymmetric ??
>  
> > * What is the Key Length used? (Can we use 1024?)
> 
> not yet
> --> "AGRandomGenerator" does provide an API to get random bytes. 
> [AGRandomGenerator randomBytes:<length>]; 
> 
> So, does it mean that we could have the key in any size??
> 

Nope the fact that AGRandomGenerator take length as parameter is because it is a generic random generator (defaulted to 16bytes) 

but for for Asymm we check the length of key:
https://github.com/aerogear/aerogear-crypto-ios/blob/master/crypto-sdk/AGVerifyKey.m#L28
32bytes.

For asymmetric cryptography, we use ed25519.


> > * What is the algorithm used for Digital Signature ?
> 
> coming soon
> I leave that one for our security @abstractj ;)
> 
> >
> >
> > Thanks & Regards,.
> > Saravanan V
> > _______________________________________________
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> > aerogear-dev at lists.jboss.org
> > https://lists.jboss.org/mailman/listinfo/aerogear-dev
> 
> 
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