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The Bouncy Castle Java APIs for the OpenPGP Protocol. The APIs are designed primarily to be used in conjunction with the BC LTS provider but may also be used with other providers providing cryptographic services.

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package org.bouncycastle.bcpg.sig;

import org.bouncycastle.bcpg.SignatureSubpacket;
import org.bouncycastle.bcpg.SignatureSubpacketTags;

/**
 * Signature Subpacket encoding the level and amount of trust the issuer places into the certified key or identity.
 *
 * @see 
 *     RFC4880 - Trust Packet
 * @see 
 *     RFC9580 - Trust Signature
 */
public class TrustSignature 
    extends SignatureSubpacket
{    
    private static byte[] intToByteArray(
        int    v1,
        int    v2)
    {
        byte[]    data = new byte[2];
        
        data[0] = (byte)v1;
        data[1] = (byte)v2;
        
        return data;
    }
    
    public TrustSignature(
        boolean    critical,
        boolean    isLongLength,
        byte[]     data)
    {
        super(SignatureSubpacketTags.TRUST_SIG, critical, isLongLength, data);
    }
    
    public TrustSignature(
        boolean    critical,
        int        depth,
        int        trustAmount)
    {
        super(SignatureSubpacketTags.TRUST_SIG, critical, false, intToByteArray(depth, trustAmount));
    }
    
    public int getDepth()
    {
        return data[0] & 0xff;
    }
    
    public int getTrustAmount()
    {
        return data[1] & 0xff;
    }
}