Better support for `operationPrompt` about ellipticcurvekeypair HOT 4 OPEN

Yep. Thanks for chiming in.

One additional constraint is that we don’t want to query the private key excessively for devices that doesnt support the access control flag «privateKeyUsage».

from ellipticcurvekeypair.

I've had to do the same in my own implementation i.e. use operationPrompt pre iOS 11.x

I don't think you currently have any other choice and although it's not so nice, it is a necessary evil for the moment.

from ellipticcurvekeypair.

Looks like a reasonable solution. I'm not sure if you implied this or not but this enum could also be utilized at the API level?

let config = EllipticCurveKeyPair.Config(
...
                operationPrompt: EllipticCurveKeyPair.Prompt.string("Message"),
                // or EllipticCurveKeyPair.Prompt.context(context)
...)

from ellipticcurvekeypair.

Yes, it could. Users could also write the shorter version (omitting EllipticCurveKeyPair.Prompt)

let config = EllipticCurveKeyPair.Config(
...
                operationPrompt: .string("Message"),
...)

since the type is known.

I was looking for non-breaking changes, but it seems like a good idea to do a breaking change in order to get this right.

from ellipticcurvekeypair.