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org.bouncycastle.tls.ProtocolVersion Maven / Gradle / Ivy
package org.bouncycastle.tls;
import java.util.Vector;
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 TLSv13 = new ProtocolVersion(0x0304, "TLS 1.3");
public static final ProtocolVersion DTLSv10 = new ProtocolVersion(0xFEFF, "DTLS 1.0");
public static final ProtocolVersion DTLSv12 = new ProtocolVersion(0xFEFD, "DTLS 1.2");
public static final ProtocolVersion DTLSv13 = new ProtocolVersion(0xFEFC, "DTLS 1.3");
static final ProtocolVersion CLIENT_EARLIEST_SUPPORTED_DTLS = DTLSv10;
static final ProtocolVersion CLIENT_EARLIEST_SUPPORTED_TLS = SSLv3;
static final ProtocolVersion CLIENT_LATEST_SUPPORTED_DTLS = DTLSv12;
static final ProtocolVersion CLIENT_LATEST_SUPPORTED_TLS = TLSv13;
static final ProtocolVersion SERVER_EARLIEST_SUPPORTED_DTLS = DTLSv10;
static final ProtocolVersion SERVER_EARLIEST_SUPPORTED_TLS = SSLv3;
static final ProtocolVersion SERVER_LATEST_SUPPORTED_DTLS = DTLSv12;
static final ProtocolVersion SERVER_LATEST_SUPPORTED_TLS = TLSv13;
public static boolean contains(ProtocolVersion[] versions, ProtocolVersion version)
{
if (versions != null && version != null)
{
for (int i = 0; i < versions.length; ++i)
{
if (version.equals(versions[i]))
{
return true;
}
}
}
return false;
}
public static ProtocolVersion getEarliestDTLS(ProtocolVersion[] versions)
{
ProtocolVersion earliest = null;
if (null != versions)
{
for (int i = 0; i < versions.length; ++i)
{
ProtocolVersion next = versions[i];
if (null != next && next.isDTLS())
{
if (null == earliest || next.getMinorVersion() > earliest.getMinorVersion())
{
earliest = next;
}
}
}
}
return earliest;
}
public static ProtocolVersion getEarliestTLS(ProtocolVersion[] versions)
{
ProtocolVersion earliest = null;
if (null != versions)
{
for (int i = 0; i < versions.length; ++i)
{
ProtocolVersion next = versions[i];
if (null != next && next.isTLS())
{
if (null == earliest || next.getMinorVersion() < earliest.getMinorVersion())
{
earliest = next;
}
}
}
}
return earliest;
}
public static ProtocolVersion getLatestDTLS(ProtocolVersion[] versions)
{
ProtocolVersion latest = null;
if (null != versions)
{
for (int i = 0; i < versions.length; ++i)
{
ProtocolVersion next = versions[i];
if (null != next && next.isDTLS())
{
if (null == latest || next.getMinorVersion() < latest.getMinorVersion())
{
latest = next;
}
}
}
}
return latest;
}
public static ProtocolVersion getLatestTLS(ProtocolVersion[] versions)
{
ProtocolVersion latest = null;
if (null != versions)
{
for (int i = 0; i < versions.length; ++i)
{
ProtocolVersion next = versions[i];
if (null != next && next.isTLS())
{
if (null == latest || next.getMinorVersion() > latest.getMinorVersion())
{
latest = next;
}
}
}
}
return latest;
}
static boolean isSupportedDTLSVersionClient(ProtocolVersion version)
{
return null != version
&& version.isEqualOrLaterVersionOf(CLIENT_EARLIEST_SUPPORTED_DTLS)
&& version.isEqualOrEarlierVersionOf(CLIENT_LATEST_SUPPORTED_DTLS);
}
static boolean isSupportedDTLSVersionServer(ProtocolVersion version)
{
return null != version
&& version.isEqualOrLaterVersionOf(SERVER_EARLIEST_SUPPORTED_DTLS)
&& version.isEqualOrEarlierVersionOf(SERVER_LATEST_SUPPORTED_DTLS);
}
static boolean isSupportedTLSVersionClient(ProtocolVersion version)
{
if (null == version)
{
return false;
}
int fullVersion = version.getFullVersion();
return fullVersion >= CLIENT_EARLIEST_SUPPORTED_TLS.getFullVersion()
&& fullVersion <= CLIENT_LATEST_SUPPORTED_TLS.getFullVersion();
}
static boolean isSupportedTLSVersionServer(ProtocolVersion version)
{
if (null == version)
{
return false;
}
int fullVersion = version.getFullVersion();
return fullVersion >= SERVER_EARLIEST_SUPPORTED_TLS.getFullVersion()
&& fullVersion <= SERVER_LATEST_SUPPORTED_TLS.getFullVersion();
}
private int version;
private String name;
private ProtocolVersion(int v, String name)
{
this.version = v & 0xFFFF;
this.name = name;
}
public ProtocolVersion[] downTo(ProtocolVersion min)
{
if (!isEqualOrLaterVersionOf(min))
{
throw new IllegalArgumentException("'min' must be an equal or earlier version of this one");
}
Vector result = new Vector();
result.addElement(this);
ProtocolVersion current = this;
while (!current.equals(min))
{
current = current.getPreviousVersion();
result.addElement(current);
}
ProtocolVersion[] versions = new ProtocolVersion[result.size()];
for (int i = 0; i < result.size(); ++i)
{
versions[i] = (ProtocolVersion)result.elementAt(i);
}
return versions;
}
public int getFullVersion()
{
return version;
}
public int getMajorVersion()
{
return version >> 8;
}
public int getMinorVersion()
{
return version & 0xFF;
}
public String getName()
{
return name;
}
public boolean isDTLS()
{
return getMajorVersion() == 0xFE;
}
public boolean isSSL()
{
return this == SSLv3;
}
public boolean isTLS()
{
return getMajorVersion() == 0x03;
}
public ProtocolVersion getEquivalentTLSVersion()
{
switch (getMajorVersion())
{
case 0x03:
return this;
case 0xFE:
switch(getMinorVersion())
{
case 0xFF:
return TLSv11;
case 0xFD:
return TLSv12;
case 0xFC:
return TLSv13;
default:
return null;
}
default:
return null;
}
}
public ProtocolVersion getNextVersion()
{
int major = getMajorVersion(), minor = getMinorVersion();
switch (major)
{
case 0x03:
switch (minor)
{
case 0xFF:
return null;
default:
return get(major, minor + 1);
}
case 0xFE:
switch(minor)
{
case 0x00:
return null;
case 0xFF:
return DTLSv12;
default:
return get(major, minor - 1);
}
default:
return null;
}
}
public ProtocolVersion getPreviousVersion()
{
int major = getMajorVersion(), minor = getMinorVersion();
switch (major)
{
case 0x03:
switch (minor)
{
case 0x00:
return null;
default:
return get(major, minor - 1);
}
case 0xFE:
switch(minor)
{
case 0xFF:
return null;
case 0xFD:
return DTLSv10;
default:
return get(major, minor + 1);
}
default:
return null;
}
}
public boolean isEarlierVersionOf(ProtocolVersion version)
{
if (null == version || getMajorVersion() != version.getMajorVersion())
{
return false;
}
int diffMinorVersion = getMinorVersion() - version.getMinorVersion();
return isDTLS() ? diffMinorVersion > 0 : diffMinorVersion < 0;
}
public boolean isEqualOrEarlierVersionOf(ProtocolVersion version)
{
if (null == version || getMajorVersion() != version.getMajorVersion())
{
return false;
}
int diffMinorVersion = getMinorVersion() - version.getMinorVersion();
return isDTLS() ? diffMinorVersion >= 0 : diffMinorVersion <= 0;
}
public boolean isEqualOrLaterVersionOf(ProtocolVersion version)
{
if (null == version || getMajorVersion() != version.getMajorVersion())
{
return false;
}
int diffMinorVersion = getMinorVersion() - version.getMinorVersion();
return isDTLS() ? diffMinorVersion <= 0 : diffMinorVersion >= 0;
}
public boolean isLaterVersionOf(ProtocolVersion version)
{
if (null == version || getMajorVersion() != version.getMajorVersion())
{
return false;
}
int diffMinorVersion = getMinorVersion() - version.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)
{
switch (major)
{
case 0x03:
{
switch (minor)
{
case 0x00:
return SSLv3;
case 0x01:
return TLSv10;
case 0x02:
return TLSv11;
case 0x03:
return TLSv12;
case 0x04:
return TLSv13;
}
return getUnknownVersion(major, minor, "TLS");
}
case 0xFE:
{
switch (minor)
{
case 0xFF:
return DTLSv10;
case 0xFE:
throw new IllegalArgumentException("{0xFE, 0xFE} is a reserved protocol version");
case 0xFD:
return DTLSv12;
case 0xFC:
return DTLSv13;
}
return getUnknownVersion(major, minor, "DTLS");
}
default:
{
return getUnknownVersion(major, minor, "UNKNOWN");
}
}
}
public ProtocolVersion[] only()
{
return new ProtocolVersion[]{ this };
}
public String toString()
{
return name;
}
private static void checkUint8(int versionOctet)
{
if (!TlsUtils.isValidUint8(versionOctet))
{
throw new IllegalArgumentException("'versionOctet' is not a valid octet");
}
}
private static ProtocolVersion getUnknownVersion(int major, int minor, String prefix)
{
checkUint8(major);
checkUint8(minor);
int v = (major << 8) | minor;
String hex = Strings.toUpperCase(Integer.toHexString(0x10000 | v).substring(1));
return new ProtocolVersion(v, prefix + " 0x" + hex);
}
}
