We have encountered a problem where loading JSON Web Keys (JWKs) results in the following error message:

"failed to validate JSON Web Key: failed to validate JWK: marshaled JWK does not match original JWK"

The JWK is set as follows:

                "kty": "EC",
                "crv": "P-256",
                "alg": "ES256"

Upon investigation, we found that the problem lies in one of the key coordinates starting with a leading zero. For example:
The x coordinate starts with "ALTu..." After the coordinate is changed with the following function

However, after calling Set.Bytes() on this value, the leading zero disappears..

This discrepancy leads to the original error message because the deepEqual check here no longer validates correctly.

We recommend addressing this issue by ensuring consistent handling of leading zeros in key coordinates during JWK validation.

We hope to hear soon from you!

Kind regards,
Hauke