http://www.bouncycastle.org/java.html: The Bouncy Castle Crypto package is a Java implementation of cryptographic algorithms. This jar contains JCE provider and lightweight API for the Bouncy Castle Cryptography APIs for JDK 1.5 to JDK 1.8.
  • The Legion of the Bouncy Castle Inc. 
package org.bouncycastle.crypto.tls;

public class SRTPProtectionProfile
{
    /*
     * RFC 5764 4.1.2.
     */
    public static final int SRTP_AES128_CM_HMAC_SHA1_80 = 0x0001;
    public static final int SRTP_AES128_CM_HMAC_SHA1_32 = 0x0002;
    public static final int SRTP_NULL_HMAC_SHA1_80 = 0x0005;
    public static final int SRTP_NULL_HMAC_SHA1_32 = 0x0006;

    /*
     * RFC 7714 14.2.
     */
    public static final int SRTP_AEAD_AES_128_GCM = 0x0007;
    public static final int SRTP_AEAD_AES_256_GCM = 0x0008;
}