keyResolverList.add(new KeyResolver(new X509SKIResolver()));
keyResolverList.add(new KeyResolver(new RetrievalMethodResolver()));
keyResolverList.add(new KeyResolver(new X509SubjectNameResolver()));
keyResolverList.add(new KeyResolver(new X509IssuerSerialResolver()));
keyResolverList.add(new KeyResolver(new DEREncodedKeyValueResolver()));
keyResolverList.add(new KeyResolver(new KeyInfoReferenceResolver()));
keyResolverList.add(new KeyResolver(new X509DigestResolver()));
resolverVector.addAll(keyResolverList);
}