ValidationHandler issues in version 5.0.0

Hey! First off, good work on reducing bundle-size when moving to browser-API’s instead of 3rd party libs! However, there’s some new issues with the JwksValidationHandler:

First off, the inferred algorithm is missing a hyphen when compared to the accepted algorithms listed on the API documentation for SubtleCrypto#digest:

https://developer.mozilla.org/en-US/docs/Web/API/SubtleCrypto/digest

In my case the inferred algorithm is sha256, but the missing hyphen leaves me with this exception when it runs crypto.subtle.digest():

DOMException: Algorithm: Unrecognized name

I think this can be sorted by adding the hyphen here: https://github.com/manfredsteyer/angular-oauth2-oidc/blob/master/projects/lib/src/token-validation/validation-handler.ts#L78 so the inferred algorithm would be sha-256

Secondly, in ValidationHandler#validateAtHash I get this error: angular-oauth2-oidc.js?5916:1185 DOMException: Failed to execute 'btoa' on 'Window': The string to be encoded contains characters outside of the Latin1 range. when running btoa(leftMostHalf) located here: https://github.com/manfredsteyer/angular-oauth2-oidc/blob/master/projects/lib/src/token-validation/validation-handler.ts#L49

[manfredsteyer]

Thx again for this report. Unfortunately, we’ve tested this under the wrong circumstances. Now it works as before using jsrasign.

But we are sill looking into ways to get rid of it.

https://github.com/manfredsteyer/angular-oauth2-oidc/releases/tag/5.0.2

[enterprisebug]

Same with me. When using JwksValidationHandler i get the error in console:

of course the error goes away when using a NullValidationHandler