Can I get the modulus or exponent from a SecKeyRef object in Swift?

Question

In Swift, I created a SecKeyRef object by calling SecTrustCopyPublicKey on some raw X509 certificate data. This is what this SecKeyRef object looks like.

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Answer 1

I've been down the same path trying to do SSL Public Key Pinning. The API's are pretty much non-existent, and the solution I found was to put it in the Keychain which you can then retrieve as NSData (which can then be Base64 Encoded). It's horrible but the only thing I could find after a day or so of research (without resorting to bundling OpenSSL with my app).

I ported some of my code over to Swift, but I haven't tested it very much so I'm not 100% sure that it works: https://gist.github.com/chedabob/64a4cdc4a1194d815814

It's based off this Obj-C code (which I'm confident works as it's in a production app): https://gist.github.com/chedabob/49eed109a3dfcad4bd41