Issue verifying child certificate using RSA

[alxdavids]

I have a child certificate that is signed by an issuing certificate using an RSA key. When I run:

issuingCert.checkSignature(childCert);

I get the following error:

wrong public key type

I noticed that the error occurs here: https://github.com/fidm/x509/blob/master/src/pki.ts#L267 and that only the hashAlgorithm is passed (which is SHA-256). When running createVerify("SHA-256") an ECDSA verifier is created. When I replaced hashAlgorithm with RSA-SHA256, verification worked.

So I think the fix is to check for the public key type before accepting hashAlgorithm.