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The Bouncy Castle Java APIs for the TLS, including a JSSE provider. The APIs are designed primarily to be used in conjunction with the BC FIPS provider. The APIs may also be used with other providers although if being used in a FIPS context it is the responsibility of the user to ensure that any other providers used are FIPS certified and used appropriately.

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package org.bouncycastle.tls;

/**
 * RFC 2246
 * 
 * Note that the values here are implementation-specific and arbitrary. It is recommended not to
 * depend on the particular values (e.g. serialization).
 */
public class KeyExchangeAlgorithm
{
    /*
     * NOTE: We interpret TLS 1.3 cipher suites as having a NULL key exchange
     */
    public static final int NULL = 0;

    public static final int RSA = 1;
    public static final int RSA_EXPORT = 2;
    public static final int DHE_DSS = 3;
    public static final int DHE_DSS_EXPORT = 4;
    public static final int DHE_RSA = 5;
    public static final int DHE_RSA_EXPORT = 6;
    public static final int DH_DSS = 7;
    public static final int DH_DSS_EXPORT = 8;
    public static final int DH_RSA = 9;
    public static final int DH_RSA_EXPORT = 10;
    public static final int DH_anon = 11;
    public static final int DH_anon_EXPORT = 12;

    /*
     * RFC 4279
     */
    public static final int PSK = 13;
    public static final int DHE_PSK = 14;
    public static final int RSA_PSK = 15;

    /*
     * RFC 4429
     */
    public static final int ECDH_ECDSA = 16;
    public static final int ECDHE_ECDSA = 17;
    public static final int ECDH_RSA = 18;
    public static final int ECDHE_RSA = 19;
    public static final int ECDH_anon = 20;

    /*
     * RFC 5054
     */
    public static final int SRP = 21;
    public static final int SRP_DSS = 22;
    public static final int SRP_RSA = 23;
    
    /*
     * RFC 5489
     */
    public static final int ECDHE_PSK = 24;

    /*
     * GMT 0024-2014
     */
    public static final int SM2 = 25;

    public static boolean isAnonymous(int keyExchangeAlgorithm)
    {
        switch (keyExchangeAlgorithm)
        {
        case DH_anon:
        case DH_anon_EXPORT:
        case ECDH_anon:
            return true;
        default:
            return false;
        }
    }
}