org.bouncycastle.jsse.BCSNIHostName Maven / Gradle / Ivy

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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.jsse;

import java.io.UnsupportedEncodingException;
import java.util.Locale;
import java.util.regex.Pattern;

public final class BCSNIHostName extends BCSNIServerName
{
    public static BCSNIMatcher createSNIMatcher(String regex)
    {
        if (regex == null)
        {
            throw new NullPointerException("'regex' cannot be null");
        }

        return new BCSNIHostNameMatcher(regex);
    }

    private final String hostName;

    private static String fromAscii(byte[] bs)
    {
        try
        {
            return new String(bs, "ASCII");
        }
        catch (UnsupportedEncodingException e)
        {
            throw new RuntimeException(e);
        }
    }

    private static byte[] toAscii(String s)
    {
        try
        {
            return s.getBytes("ASCII");
        }
        catch (UnsupportedEncodingException e)
        {
            throw new RuntimeException(e);
        }
    }

    public BCSNIHostName(String hostName)
    {
        super(BCStandardConstants.SNI_HOST_NAME, toAscii(hostName));

        this.hostName = hostName;
    }

    public BCSNIHostName(byte[] asciiEncoding)
    {
        super(BCStandardConstants.SNI_HOST_NAME, asciiEncoding);

        this.hostName = fromAscii(asciiEncoding);
    }

    public String getAsciiName()
    {
        return hostName;
    }

    public boolean equals(Object obj)
    {
        if (this == obj)
        {
            return true;
        }
        if (!(obj instanceof BCSNIHostName))
        {
            return false;
        }
        BCSNIHostName other = (BCSNIHostName)obj;
        return hostName.equalsIgnoreCase(other.hostName);
    }

    public int hashCode()
    {
        return hostName.toUpperCase(Locale.ENGLISH).hashCode();
    }

    private static final class BCSNIHostNameMatcher
        extends BCSNIMatcher
    {
        private final Pattern pattern;

        BCSNIHostNameMatcher(String regex)
        {
            super(BCStandardConstants.SNI_HOST_NAME);

            this.pattern = Pattern.compile(regex, Pattern.CASE_INSENSITIVE);
        }

        public boolean matches(BCSNIServerName serverName)
        {
            if (serverName == null || serverName.getType() != BCStandardConstants.SNI_HOST_NAME)
            {
                return false;
            }

            String hostName = fromAscii(serverName.getEncoded());

            return pattern.matcher(hostName).matches();
        }
    }
}