Re: Share and store RSA - public key in java server and vice versa
Re: Share and store RSA - public key in java server and vice versa
- Subject: Re: Share and store RSA - public key in java server and vice versa
- From: Jens Alfke <email@hidden>
- Date: Tue, 13 May 2014 09:37:47 -0700
On May 13, 2014, at 22:20, Devarshi Kulshreshtha <email@hidden> wrote:
> In CyrptoExercise sample provided by apple, we have a wrapper class: SecKeyWrapper.
First, I think CryptoExercise is out of date. It’s not included in Xcode 5.1’s doc set. I found it on Apple’s website, but it looks like it was last updated for iOS 3, and it has a bunch of obsolete workarounds for running in the simulator (a long time ago the Keychain APIs were different in the device and simulator environments.)
> Shall I use below code to create and send an encoded string to server:
> 1. SecKeyWrapper *keyWrapper = [SecKeyWrapper sharedWrapper];
> 2. NSData *publicKeyData = [keyWrapper getPublicKeyBits];
It’s sample code, not a black box, so you can look at what it does yourself. The two lines you gave aren’t going to do anything by themselves — getPublicKeyBits just reads an already-existing public key out of the Keychain and encodes it. You have to generate the key first.
—Jens
PS: This discussion really belongs on the apple_cdsa list, which is for crypto/security discussions. Unfortunately Apple’s engineers never help out on that list (unlike on xcode-users or macnetworkprog), but there are some other fairly knowledgeable people there.
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