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 * obtain a copy of the License at
 * https://glassfish.dev.java.net/public/CDDL+GPL_1_1.html
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// Portions Copyright [2018-2019] [Payara Foundation and/or its affiliates]

package org.glassfish.security.common;

import javax.net.ssl.SSLServerSocketFactory;
import java.util.HashMap;
import java.util.Map;

/**
 * This class represents the information associated to ciphers. It also maintains a HashMap from configName to
 * CipherInfo.
 * 
 * @author Shing Wai Chan
 */
public class CipherInfo {

    private static final short TLS = 0x4;

    // The old names mapped to the standard names as existed
    private static final String[][] OLD_CIPHER_MAPPING = {
            // IWS 6.x or earlier
            {"rsa_null_md5"   , "SSL_RSA_WITH_NULL_MD5"},
            {"rsa_null_sha"   , "SSL_RSA_WITH_NULL_SHA"},
            {"rsa_rc4_40_md5" , "SSL_RSA_EXPORT_WITH_RC4_40_MD5"},
            {"rsa_rc4_128_md5", "SSL_RSA_WITH_RC4_128_MD5"},
            {"rsa_rc4_128_sha", "SSL_RSA_WITH_RC4_128_SHA"},
            {"rsa_3des_sha"   , "SSL_RSA_WITH_3DES_EDE_CBC_SHA"},
            {"fips_des_sha"   , "SSL_RSA_WITH_DES_CBC_SHA"},
            {"rsa_des_sha"    , "SSL_RSA_WITH_DES_CBC_SHA"},

            // backward compatible with AS 9.0 or earlier
            {"SSL_RSA_WITH_NULL_MD5", "SSL_RSA_WITH_NULL_MD5"},
            {"SSL_RSA_WITH_NULL_SHA", "SSL_RSA_WITH_NULL_SHA"}
        };

    private static final Map ciphers = new HashMap();

    private final String configName;
    private final String cipherName;
    private final short protocolVersion;

    static {
        int len = OLD_CIPHER_MAPPING.length;
        for (int i = 0; i < len; i++) {
            String nonStdName = OLD_CIPHER_MAPPING[i][0];
            String stdName = OLD_CIPHER_MAPPING[i][1];
            ciphers.put(nonStdName, new CipherInfo(nonStdName, stdName, TLS));
        }

        SSLServerSocketFactory factory = (SSLServerSocketFactory) SSLServerSocketFactory.getDefault();
        String[] supportedCiphers = factory.getDefaultCipherSuites();
        len = supportedCiphers.length;
        for (int i = 0; i < len; i++) {
            String s = supportedCiphers[i];
            ciphers.put(s, new CipherInfo(s, s, TLS));
        }
    }

    /**
     * @param configName name used in domain.xml, sun-acc.xml
     * @param cipherName name that may depends on backend
     * @param protocolVersion
     */
    private CipherInfo(String configName, String cipherName, short protocolVersion) {
        this.configName = configName;
        this.cipherName = cipherName;
        this.protocolVersion = protocolVersion;
    }

    public static CipherInfo getCipherInfo(String configName) {
        return (CipherInfo) ciphers.get(configName);
    }

    public String getConfigName() {
        return configName;
    }

    public String getCipherName() {
        return cipherName;
    }

    public boolean isTLS() {
        return (protocolVersion & TLS) == TLS;
    }
}