package com.auth0.jwt.interfaces; /** * The Header class represents the 1st part of the JWT, where the Header value is hold. */ public interface Header { /** * Getter for the Algorithm "alg" claim defined in the JWT's Header. If the claim is missing it will return null. * * @return the Algorithm defined or null. */ String getAlgorithm(); /** * Getter for the Type "typ" claim defined in the JWT's Header. If the claim is missing it will return null. * * @return the Type defined or null. */ String getType(); /** * Getter for the Content Type "cty" claim defined in the JWT's Header. If the claim is missing it will return null. * * @return the Content Type defined or null. */ String getContentType(); /** * Get the value of the "kid" claim, or null if it's not available. * * @return the Key ID value or null. */ String getKeyId(); /** * Get a Private Claim given it's name. If the Claim wasn't specified in the Header, a NullClaim will be returned. * * @param name the name of the Claim to retrieve. * @return a non-null Claim. */ Claim getHeaderClaim(String name); }