nl.open.jwtdependency.org.bouncycastle.crypto.tls.ProtocolVersion Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of java-jwt-nodependencies Show documentation

This is a drop in replacement for the auth0 java-jwt library (see https://github.com/auth0/java-jwt). This jar makes sure there are no external dependencies (e.g. fasterXml, Apacha Commons) needed. This is useful when deploying to an application server (e.g. tomcat with Alfreso or Pega).

The newest version!

package org.bouncycastle.crypto.tls;

import java.io.IOException;

import org.bouncycastle.util.Strings;

public final class ProtocolVersion
{
    public static final ProtocolVersion SSLv3 = new ProtocolVersion(0x0300, "SSL 3.0");
    public static final ProtocolVersion TLSv10 = new ProtocolVersion(0x0301, "TLS 1.0");
    public static final ProtocolVersion TLSv11 = new ProtocolVersion(0x0302, "TLS 1.1");
    public static final ProtocolVersion TLSv12 = new ProtocolVersion(0x0303, "TLS 1.2");
    public static final ProtocolVersion DTLSv10 = new ProtocolVersion(0xFEFF, "DTLS 1.0");
    public static final ProtocolVersion DTLSv12 = new ProtocolVersion(0xFEFD, "DTLS 1.2");

    private int version;
    private String name;

    private ProtocolVersion(int v, String name)
    {
        this.version = v & 0xffff;
        this.name = name;
    }

    public int getFullVersion()
    {
        return version;
    }

    public int getMajorVersion()
    {
        return version >> 8;
    }

    public int getMinorVersion()
    {
        return version & 0xff;
    }

    public boolean isDTLS()
    {
        return getMajorVersion() == 0xFE;
    }

    public boolean isSSL()
    {
        return this == SSLv3;
    }

    public boolean isTLS()
    {
        return getMajorVersion() == 0x03;
    }

    public ProtocolVersion getEquivalentTLSVersion()
    {
        if (!isDTLS())
        {
            return this;
        }
        if (this == DTLSv10)
        {
            return TLSv11;
        }
        return TLSv12;
    }

    public boolean isEqualOrEarlierVersionOf(ProtocolVersion version)
    {
        if (getMajorVersion() != version.getMajorVersion())
        {
            return false;
        }
        int diffMinorVersion = version.getMinorVersion() - getMinorVersion();
        return isDTLS() ? diffMinorVersion <= 0 : diffMinorVersion >= 0;
    }

    public boolean isLaterVersionOf(ProtocolVersion version)
    {
        if (getMajorVersion() != version.getMajorVersion())
        {
            return false;
        }
        int diffMinorVersion = version.getMinorVersion() - getMinorVersion();
        return isDTLS() ? diffMinorVersion > 0 : diffMinorVersion < 0;
    }

    public boolean equals(Object other)
    {
        return this == other || (other instanceof ProtocolVersion && equals((ProtocolVersion)other));
    }

    public boolean equals(ProtocolVersion other)
    {
        return other != null && this.version == other.version;
    }

    public int hashCode()
    {
        return version;
    }

    public static ProtocolVersion get(int major, int minor)
        throws IOException
    {
        switch (major)
        {
        case 0x03:
        {
            switch (minor)
            {
            case 0x00:
                return SSLv3;
            case 0x01:
                return TLSv10;
            case 0x02:
                return TLSv11;
            case 0x03:
                return TLSv12;
            }
            return getUnknownVersion(major, minor, "TLS");
        }
        case 0xFE:
        {
            switch (minor)
            {
            case 0xFF:
                return DTLSv10;
            case 0xFE:
                throw new TlsFatalAlert(AlertDescription.illegal_parameter);
            case 0xFD:
                return DTLSv12;
            }
            return getUnknownVersion(major, minor, "DTLS");
        }
        default:
        {
            throw new TlsFatalAlert(AlertDescription.illegal_parameter);
        }
        }
    }

    public String toString()
    {
        return name;
    }

    private static ProtocolVersion getUnknownVersion(int major, int minor, String prefix)
        throws IOException
    {
        TlsUtils.checkUint8(major);
        TlsUtils.checkUint8(minor);

        int v = (major << 8) | minor;
        String hex = Strings.toUpperCase(Integer.toHexString(0x10000 | v).substring(1));
        return new ProtocolVersion(v, prefix + " 0x" + hex);
    }
}