Hello, On Thu, Aug 25, 2011 at 3:16 AM, Nic Wise <n...@fastchicken.co.nz> wrote: > This could be worth a look: > > http://iphonedevelopment.blogspot.com/2009/04/crypto-library.html
That looks like an ObjectiveC wrapper. Since CommonCrypto is a C-based API it would be easier to p/invoke directly. > however, it also could be that generating a 2048 bit key is just a > LONG operation, which takes a while on a slow CPU.... > > how long does it take on the desktop (ie, same code in a commandline app)? > > On Wed, Aug 24, 2011 at 22:15, monojobs <sj...@rocketmail.com> wrote: >> Hello, >> >> I am currently trying to generate a RSA key pair for an app I am working >> on. The issue is that using RSACryptoServiceProvider (which internally uses >> RSAManaged) is horribly slow. Generating even a small 512 bit key pair >> takes ~7 seconds on device. 1024 bit takes ~15s. The big issue is that >> 2048 bit takes minutes. This seems be a problem with how RSAManaged is >> implemented specifically how BigInteger is used. I realize that generating >> a RSA key pair is an expensive operation, however, the 2048 bit case is not >> usable. Time will vary a lot depending on your device. I'm not aware (did not really check) of any RSA-accelerated iOS devices (like some have accelerated support for AES and SHA1). Other devices, like smartcards, generally use specialized hardware to ensure such operations are "fast enough". >> Does anyone know of any Mono bindings to native crypto library? >> >> I have tried to use MonoTouch.Security.SecKey.GenerateKeyPair, however, it >> always returns with a SecStatusCode.Unimplemented. There is a good >> possibility that I am using it incorrectly as well, so if anyone has an >> example it would be much appreciated. Fill a bug report, with an attached test case, and we'll look into the 'Unimplemented' bit. Sebastien >> >> Thanks! >> >> >> -- >> View this message in context: >> http://monotouch.2284126.n4.nabble.com/RSA-key-pair-generation-tp3766685p3766685.html >> Sent from the MonoTouch mailing list archive at Nabble.com. >> _______________________________________________ >> MonoTouch mailing list >> MonoTouch@lists.ximian.com >> http://lists.ximian.com/mailman/listinfo/monotouch >> > > > > -- > Nic Wise > t. +44 7788 592 806 | @fastchicken | http://www.linkedin.com/in/nicwise > b. http://www.fastchicken.co.nz/ > > mobileAgent (for FreeAgent): get your accounts in your pocket. > http://goo.gl/IuBU > Trip Wallet: Keep track of your budget on the go: http://goo.gl/ePhKa > London Bike App: Find the nearest Boris Bike, and get riding! > http://goo.gl/Icp2 > _______________________________________________ > MonoTouch mailing list > MonoTouch@lists.ximian.com > http://lists.ximian.com/mailman/listinfo/monotouch > _______________________________________________ MonoTouch mailing list MonoTouch@lists.ximian.com http://lists.ximian.com/mailman/listinfo/monotouch
