/*
* Tell the client what security type will be used (protocol 3.3).
*/
static void
rfbSendSecurityType(rfbClientPtr cl, int32_t securityType)
{
uint32_t value32;
/* Send the value. */
value32 = Swap32IfLE(securityType);
if (rfbWriteExact(cl, (char *)&value32, 4) < 0) {
rfbLogPerror("rfbSendSecurityType: write");
rfbCloseClient(cl);
return;
}
/* Decide what to do next. */
switch (securityType) {
case rfbSecTypeNone:
/* Dispatch client input to rfbProcessClientInitMessage. */
cl->state = RFB_INITIALISATION;
break;
case rfbSecTypeVncAuth:
/* Begin the standard VNC authentication procedure. */
rfbVncAuthSendChallenge(cl);
break;
default:
/* Impossible case (hopefully). */
rfbLogPerror("rfbSendSecurityType: assertion failed");
rfbCloseClient(cl);
}
}
void
rfbProcessClientAuthType(rfbClientPtr cl)
{
uint32_t auth_type;
int n, i;
rfbTightClientPtr rtcp = rfbGetTightClientData(cl);
rfbLog("tightvnc-filetransfer/rfbProcessClientAuthType\n");
if(rtcp == NULL)
return;
/* Read authentication type selected by the client. */
n = rfbReadExact(cl, (char *)&auth_type, sizeof(auth_type));
if (n <= 0) {
if (n == 0)
rfbLog("rfbProcessClientAuthType: client gone\n");
else
rfbLogPerror("rfbProcessClientAuthType: read");
rfbCloseClient(cl);
return;
}
auth_type = Swap32IfLE(auth_type);
/* Make sure it was present in the list sent by the server. */
for (i = 0; i < rtcp->nAuthCaps; i++) {
if (auth_type == rtcp->authCaps[i])
break;
}
if (i >= rtcp->nAuthCaps) {
rfbLog("rfbProcessClientAuthType: "
"wrong authentication type requested\n");
rfbCloseClient(cl);
return;
}
switch (auth_type) {
case rfbAuthNone:
/* Dispatch client input to rfbProcessClientInitMessage. */
#ifdef USE_SECTYPE_TIGHT_FOR_RFB_3_8
SECTYPE_TIGHT_FOR_RFB_3_8
#endif
cl->state = RFB_INITIALISATION;
break;
case rfbAuthVNC:
rfbVncAuthSendChallenge(cl);
break;
default:
rfbLog("rfbProcessClientAuthType: unknown authentication scheme\n");
rfbCloseClient(cl);
}
}
// =========================================================================
// 函数功能：处理客户端的安全类型信息
// 输入参数：待交流的客户端cl
// 输出参数：
// 返回值 ：
// 说明 ： 只有3.7及其以上版本的server才会让cl选择安全类型
// =========================================================================void
void rfbProcessClientSecurityType(rfbClientPtr cl)
{
int n;
u8 chosenType;
u32 authResult;
/* Read the security type. */
n = ReadExact(cl, (char *)&chosenType, 1);
if (n <= 0) {
if (n == 0)
debug_printf("rfbProcessClientSecurityType: client gone\n");
else
debug_printf("rfbProcessClientSecurityType: read");
rfbCloseClient(cl);
return;
}
/* Make sure it was present in the list sent by the server. */
switch (chosenType)
{
case rfbConnFailed:
debug_printf("The client %s connfailed!\n",cl->host);
cl->state = RFB_INITIALISATION;
break;
case rfbNoAuth:
debug_printf("The client %s need no auth!\n",cl->host);
//对于3.8版本仍然需要把结果返还回去
if((cl->protocolMajorVersion==3)&&(cl->protocolMinorVersion>7))
{
authResult = Swap32IfLE(rfbVncAuthOK);
if (WriteExact(cl, (char *)&authResult, 4) < 0) {
debug_printf("rfbAuthProcessClientMessage: write");
rfbCloseClient(cl);
break;
}
}
cl->state = RFB_INITIALISATION;
break;
case rfbVncAuth:
debug_printf("The client %s need vncauth!\n",cl->host);
rfbVncAuthSendChallenge(cl);//发送挑战信息
break;
default:
debug_printf("No supported security method--%d\n",chosenType);
rfbCloseClient(cl);
break;
}
return;
}
