// =========================================================================
// 函数功能：处理客户端对挑战信息的响应
// 输入参数：待交流的客户端cl
// 输出参数：
// 返回值 ：
// 说明 ：当响应消息失败时，3.7以上的版本会发送失败的原因，而3.7及其以下会直接
// 关闭客户端
// =========================================================================
void rfbAuthProcessClientMessage(rfbClientPtr cl)
{
char *passwd="123";
int n;
u8 response[CHALLENGESIZE];
u32 authResult;
if ((n = ReadExact(cl, (char *)response, CHALLENGESIZE)) <= 0) {
if (n != 0)
debug_printf("rfbAuthProcessClientMessage: read");
rfbCloseClient(cl);
return;
}
rfbEncryptBytes(cl->authChallenge, passwd);
if (memcmp(cl->authChallenge, response, CHALLENGESIZE) != 0) {
debug_printf("rfbAuthProcessClientMessage: authentication failed from %s\n",
cl->host);
authResult = Swap32IfLE(rfbVncAuthFailed);
if (WriteExact(cl, (char *)&authResult, 4) < 0) {
debug_printf("rfbAuthProcessClientMessage: write");
rfbClientSendString(cl,"challengdge failed\n");
}
rfbCloseClient(cl);
return;
}
else
{
debug_printf("challendge success ---cl=%s",cl->host);
}
authResult = Swap32IfLE(rfbVncAuthOK);
if (WriteExact(cl, (char *)&authResult, 4) < 0) {
debug_printf("rfbAuthProcessClientMessage: write");
rfbCloseClient(cl);
return;
}
cl->state = RFB_INITIALISATION;
}
/* response is cl->authChallenge vncEncrypted with passwd */
static rfbBool rfbDefaultPasswordCheck(rfbClientPtr cl,const char* response,int len)
{
int i;
char *passwd=rfbDecryptPasswdFromFile(cl->screen->authPasswdData);
if(!passwd) {
rfbErr("Couldn't read password file: %s\n",cl->screen->authPasswdData);
return(FALSE);
}
rfbEncryptBytes(cl->authChallenge, passwd);
/* Lose the password from memory */
for (i = strlen(passwd); i >= 0; i--) {
passwd[i] = '\0';
}
free(passwd);
if (memcmp(cl->authChallenge, response, len) != 0) {
rfbErr("authProcessClientMessage: authentication failed from %s\n",
cl->host);
return(FALSE);
}
return(TRUE);
}
/* for this method, authPasswdData is really a pointer to an array
of char*'s, where the last pointer is 0. */
rfbBool rfbCheckPasswordByList(rfbClientPtr cl,const char* response,int len)
{
char **passwds;
int i=0;
for(passwds=(char**)cl->screen->authPasswdData;*passwds;passwds++,i++) {
uint8_t auth_tmp[CHALLENGESIZE];
memcpy((char *)auth_tmp, (char *)cl->authChallenge, CHALLENGESIZE);
rfbEncryptBytes(auth_tmp, *passwds);
if (memcmp(auth_tmp, response, len) == 0) {
if(i>=cl->screen->authPasswdFirstViewOnly)
cl->viewOnly=TRUE;
return(TRUE);
}
}
rfbErr("authProcessClientMessage: authentication failed from %s\n",
cl->host);
return(FALSE);
}
