import org.bouncycastle.asn1.smime.SMIMECapabilities; //导入依赖的package包/类
private CertEtcToken(ASN1TaggedObject choice)
{
    this.tagNo = choice.getTagNo();

    switch (tagNo)
    {
    case TAG_CERTIFICATE:
        value = Certificate.getInstance(choice, false);
        break;
    case TAG_ESSCERTID:
        value = ESSCertID.getInstance(choice.getObject());
        break;
    case TAG_PKISTATUS:
        value = PKIStatusInfo.getInstance(choice, false);
        break;
    case TAG_ASSERTION:
        value = ContentInfo.getInstance(choice.getObject());
        break;
    case TAG_CRL:
        value = CertificateList.getInstance(choice, false);
        break;
    case TAG_OCSPCERTSTATUS:
        value = CertStatus.getInstance(choice.getObject());
        break;
    case TAG_OCSPCERTID:
        value = CertID.getInstance(choice, false);
        break;
    case TAG_OCSPRESPONSE:
        value = OCSPResponse.getInstance(choice, false);
        break;
    case TAG_CAPABILITIES:
        value = SMIMECapabilities.getInstance(choice.getObject());
        break;
    default:
        throw new IllegalArgumentException("Unknown tag: " + tagNo);
    }
}
 

import org.bouncycastle.asn1.smime.SMIMECapabilities; //导入依赖的package包/类
/**
 * Get S/MIME capabilities (1.2.840.113549.1.9.15) extension value as a string.
 * 
 * <pre>
 * SMIMECapability ::= SEQUENCE {
 *   capabilityID OBJECT IDENTIFIER,
 *   parameters ANY DEFINED BY capabilityID OPTIONAL }
 * SMIMECapabilities ::= SEQUENCE OF SMIMECapability
 * </pre>
 * 
 * @see <a href="http://tools.ietf.org/html/rfc2633">RFC 2633</a>
 * @param bValue The octet string value
 * @return Extension value as a string
 * @throws IOException If an I/O problem occurs
 */
private String getSmimeCapabilitiesStringValue(byte[] bValue)
    throws IOException
{
	SMIMECapabilities caps = SMIMECapabilities.getInstance(ASN1Primitive.fromByteArray(bValue));

	String sParams = RB.getString("SmimeParameters");

	StringBuilder sb = new StringBuilder();

	for (Object o : caps.getCapabilities(null))
	{

		SMIMECapability cap = (SMIMECapability) o;

		String sCapId = cap.getCapabilityID().getId();
		String sCap = getRes(sCapId, "UnrecognisedSmimeCapability");

		if (sb.length() != 0)
		{
			sb.append("<br>");
		}
		sb.append("<ul><li>");
		sb.append(MessageFormat.format(sCap, sCapId));

		ASN1Encodable params;
		if ((params = cap.getParameters()) != null)
		{
			sb.append("<ul><li>");
			sb.append(sParams);
			sb.append(": ");
			sb.append(stringify(params));
			sb.append("</li></ul>");
		}

		sb.append("</li></ul>");
	}

	return sb.toString();
}