Example usage for org.bouncycastle.asn1.smime SMIMEAttributes smimeCapabilities

Introduction

In this page you can find the example usage for org.bouncycastle.asn1.smime SMIMEAttributes smimeCapabilities.

Prototype

ASN1ObjectIdentifier smimeCapabilities

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Usage

From source file:mitm.common.security.smime.SMIMEAttributeUtils.java

License:Open Source License

/**
 * Returns a list of SMIMECapability objects if the AttributeTable contains the 
 * smimeCapabilities attribute. If no attributes are found an empty list is returned.
 * //from w  w w  . j av  a  2s.co m
 * @param attributes
 */
public static List<SMIMECapability> getSMIMECapabilities(AttributeTable attributes) {
    List<SMIMECapability> capabilities = new LinkedList<SMIMECapability>();

    if (attributes != null) {
        Attribute attr = attributes.get(SMIMEAttributes.smimeCapabilities);

        if (attr != null) {
            ASN1Set set = attr.getAttrValues();

            if (set != null && set.size() > 0) {
                ASN1Encodable obj = set.getObjectAt(0);

                if (obj instanceof ASN1Sequence) {
                    ASN1Sequence sequence = (ASN1Sequence) obj;

                    for (int i = 0; i < sequence.size(); i++) {
                        ASN1Encodable der = sequence.getObjectAt(i);

                        if (der instanceof ASN1Sequence) {
                            SMIMECapability capability = new SMIMECapability((ASN1Sequence) der);

                            capabilities.add(capability);
                        }
                    }
                }
            }
        }
    }

    return capabilities;
}

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