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https://issues.apache.org/jira/browse/CXF-8402?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17260274#comment-17260274
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Colm O hEigeartaigh commented on CXF-8402:
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Can you provide some examples of leading zeros? I don't see anything obvious in 
the spec mandating this: https://tools.ietf.org/html/rfc7517

> JwkUtils::fromECPublicKey returns key coordinates without leading zero
> ----------------------------------------------------------------------
>
>                 Key: CXF-8402
>                 URL: https://issues.apache.org/jira/browse/CXF-8402
>             Project: CXF
>          Issue Type: Bug
>            Reporter: Dimitri Witkowski
>            Assignee: Colm O hEigeartaigh
>            Priority: Major
>
> Hi!
> {{JwkUtils::fromECPublicKey}} returns key coordinates without leading zeroes 
> because it's using {{BigInteger.toByteArray()}}, which returns only necessary 
> bytes to encode a big integer value, here: 
> [https://github.com/apache/cxf/blob/master/rt/rs/security/jose-parent/jose/src/main/java/org/apache/cxf/rs/security/jose/jwk/JwkUtils.java#L378]
> This causes issues in different libraries, almost everywhere leading zeroes 
> are expected to be present so that coordinate length is not changed depending 
> on data.



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