int negotiateAuthenticationTight() throws Exception {
int nAuthTypes = is.readInt();
if (nAuthTypes == 0) return AuthNone;
readCapabilityList(authCaps, nAuthTypes);
for (int i = 0; i < authCaps.numEnabled(); i++) {
int authType = authCaps.getByOrder(i);
if (authType == AuthNone || authType == AuthVNC) {
writeInt(authType);
return authType;
}
}
throw new Exception("No suitable authentication scheme found");
}
void readCapabilityList(CapsContainer caps, int count) throws IOException {
int code;
byte[] vendor = new byte[4];
byte[] name = new byte[8];
for (int i = 0; i < count; i++) {
code = is.readInt();
readFully(vendor);
readFully(name);
caps.enable(new CapabilityInfo(code, vendor, name));
}
}
void initCapabilities() {
tunnelCaps = new CapsContainer();
authCaps = new CapsContainer();
serverMsgCaps = new CapsContainer();
clientMsgCaps = new CapsContainer();
encodingCaps = new CapsContainer();
// Supported authentication methods
authCaps.add(AuthNone, StandardVendor, SigAuthNone, "No authentication");
authCaps.add(AuthVNC, StandardVendor, SigAuthVNC, "Standard VNC password authentication");
// Supported encoding types
encodingCaps.add(
EncodingCopyRect, StandardVendor, SigEncodingCopyRect, "Standard CopyRect encoding");
encodingCaps.add(EncodingRRE, StandardVendor, SigEncodingRRE, "Standard RRE encoding");
encodingCaps.add(EncodingCoRRE, StandardVendor, SigEncodingCoRRE, "Standard CoRRE encoding");
encodingCaps.add(
EncodingHextile, StandardVendor, SigEncodingHextile, "Standard Hextile encoding");
encodingCaps.add(EncodingZRLE, StandardVendor, SigEncodingZRLE, "Standard ZRLE encoding");
encodingCaps.add(EncodingZlib, TridiaVncVendor, SigEncodingZlib, "Zlib encoding");
encodingCaps.add(EncodingTight, TightVncVendor, SigEncodingTight, "Tight encoding");
// Supported pseudo-encoding types
encodingCaps.add(
EncodingCompressLevel0, TightVncVendor, SigEncodingCompressLevel0, "Compression level");
encodingCaps.add(
EncodingQualityLevel0, TightVncVendor, SigEncodingQualityLevel0, "JPEG quality level");
encodingCaps.add(
EncodingXCursor, TightVncVendor, SigEncodingXCursor, "X-style cursor shape update");
encodingCaps.add(
EncodingRichCursor,
TightVncVendor,
SigEncodingRichCursor,
"Rich-color cursor shape update");
encodingCaps.add(
EncodingPointerPos, TightVncVendor, SigEncodingPointerPos, "Pointer position update");
encodingCaps.add(
EncodingLastRect, TightVncVendor, SigEncodingLastRect, "LastRect protocol extension");
encodingCaps.add(
EncodingNewFBSize, TightVncVendor, SigEncodingNewFBSize, "Framebuffer size change");
}