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Re: [PHP] Importing ECDSA public key from javascript/subtlecrypto




Hello Adam,

Thanks for your reply.
There are two issues with the pem-jwk package:
1) It's an npm-package and using browserify didn't seem to produce a usable
file.
2) When you look into the code you see that it uses RSAPublicKey.encode,
while I need ECDSA keys.

I also looked into generating a crt from within PHP, but the standard is
complex and I don't have the time nor skills at this time to build something
like that myself.

On 06/09/17 19:20, Adam Jon Richardson wrote:
> On Fri, Jun 9, 2017 at 4:38 AM, Martijn van Duren <php@xxxxxxxxxxxxxxxxxx>
> wrote:
>>
>>
>> For a project I'm working on I need to import an ECDSA public key into
>> the openssl extension to verify data/signatures send by the client. The
>> key has been verified, so that's no problem.
>>
>> The problem is the fact that subtlecrypto exports the key as raw, spki,
>> or jwk, while non of these can be imported into the openssl extension.
>>
>> Can anyone inform me on a way to make the key compatible with the
>> openssl interface, be it on the javascript side or the php side.
>>
>> Martijn van Duren
> 
> 
> Well, you could fiddle with trying to base64 the raw output and create a
> pem-formatted crt file of your own using PHP, but this npm package looks
> easier if you export as a jwk and then use the package to convert to a pem:
> https://www.npmjs.com/package/pem-jwk
> 
> Adam
> 

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