public void test() throws IOException, CodecException, Asn1Exception, InterruptedException {
		byte[] data = getFile("/home/pls/Desktop/error.sig");
		data = Base64.decode(data);
		ContentInfo contentInfo = ASN1Utils.toASN1Obj(ContentInfo.class, data);
		SignedData sd = (SignedData) contentInfo.content;
		SignerInfo info = sd.signerInfos.elements[0];

		for (Attribute a : info.unsignedAttrs.elements) {
			if (a.values.elements[0] instanceof RevocationValues) {
				RevocationValues rv = (RevocationValues) a.values.elements[0];

				BasicOCSPResponse response = rv.ocspVals.elements[0];

				for (int i = 0; i < 20; i++) {
					System.out.println(response.tbsResponseData.producedAt.getTime().getTimeInMillis());
					Thread.sleep(17);
				}

				System.out.println("thisUpdate:" + response.tbsResponseData.responses.elements[0].thisUpdate.value);

				System.out.println("producedAt:" + response.tbsResponseData.producedAt.value);
				System.out.println("nextUpdate:" + response.tbsResponseData.responses.elements[0].nextUpdate.value);
				System.out.println("producedAt < nextUpdate " +
					  (response.tbsResponseData.producedAt.compareTo(response.tbsResponseData.responses.elements[0].nextUpdate) < 0));
			}
		}
}