X-Git-Url: https://git.distorted.org.uk/~mdw/sgt/putty/blobdiff_plain/1ddda1ca78c0458141b45197544597c566184b6f..5321c0c69fbb8966982687d208ffc5f0c17ba191:/windows/windlg.c

diff --git a/windows/windlg.c b/windows/windlg.c
index 04470cd6..89038714 100644
--- a/windows/windlg.c
+++ b/windows/windlg.c
@@ -701,6 +701,28 @@ void showabout(HWND hwnd)
     DialogBox(hinst, MAKEINTRESOURCE(IDD_ABOUTBOX), hwnd, AboutProc);
 }
 
+/* Helper function for verify_ssh_host_key(). */
+static VOID CALLBACK verify_ssh_host_key_help(LPHELPINFO lpHelpInfo)
+{
+    if (help_path) {
+	char *context = NULL;
+#define CHECK_CTX(name) \
+	do { \
+	    if (lpHelpInfo->dwContextId == WINHELP_CTXID_ ## name) \
+		context = WINHELP_CTX_ ## name; \
+	} while (0)
+	CHECK_CTX(errors_hostkey_absent);
+	CHECK_CTX(errors_hostkey_changed);
+#undef CHECK_CTX
+	if (context) {
+	    char *cmd = dupprintf("JI(`',`%s')", context);
+	    WinHelp(hwnd, help_path, HELP_COMMAND, (DWORD)cmd);
+	    sfree(cmd);
+	    requested_help = TRUE;
+	}
+    }
+}
+
 void verify_ssh_host_key(void *frontend, char *host, int port, char *keytype,
 			 char *keystr, char *fingerprint)
 {
@@ -738,6 +760,22 @@ void verify_ssh_host_key(void *frontend, char *host, int port, char *keytype,
 
     static const char mbtitle[] = "%s Security Alert";
 
+    UINT help_button = 0;
+    MSGBOXPARAMS mbox;
+
+    /*
+     * We use MessageBoxIndirect() because it allows us to specify a
+     * callback function for the Help button.
+     */
+    mbox.cbSize = sizeof(mbox);
+    mbox.hwndOwner = hwnd;
+    mbox.lpfnMsgBoxCallback = &verify_ssh_host_key_help;
+    mbox.dwLanguageId = LANG_NEUTRAL;
+
+    /* Do we have a help file? */
+    if (help_path)
+	help_button = MB_HELP;
+
     /*
      * Verify the key against the registry.
      */
@@ -747,13 +785,15 @@ void verify_ssh_host_key(void *frontend, char *host, int port, char *keytype,
 	return;
     if (ret == 2) {		       /* key was different */
 	int mbret;
-	char *message, *title;
-	message = dupprintf(wrongmsg, appname, keytype, fingerprint, appname);
-	title = dupprintf(mbtitle, appname);
-	mbret = MessageBox(NULL, message, title,
-			   MB_ICONWARNING | MB_YESNOCANCEL | MB_DEFBUTTON3);
-	sfree(message);
-	sfree(title);
+	mbox.lpszText = dupprintf(wrongmsg, appname, keytype, fingerprint,
+				  appname);
+	mbox.lpszCaption = dupprintf(mbtitle, appname);
+	mbox.dwContextHelpId = HELPCTXID(errors_hostkey_changed);
+	mbox.dwStyle = MB_ICONWARNING | MB_YESNOCANCEL | MB_DEFBUTTON3 |
+	    help_button;
+	mbret = MessageBoxIndirect(&mbox);
+	sfree((void *)mbox.lpszText);
+	sfree((void *)mbox.lpszCaption);
 	if (mbret == IDYES)
 	    store_host_key(host, port, keytype, keystr);
 	if (mbret == IDCANCEL)
@@ -761,13 +801,14 @@ void verify_ssh_host_key(void *frontend, char *host, int port, char *keytype,
     }
     if (ret == 1) {		       /* key was absent */
 	int mbret;
-	char *message, *title;
-	message = dupprintf(absentmsg, keytype, fingerprint, appname);
-	title = dupprintf(mbtitle, appname);
-	mbret = MessageBox(NULL, message, title,
-			   MB_ICONWARNING | MB_YESNOCANCEL | MB_DEFBUTTON3);
-	sfree(message);
-	sfree(title);
+	mbox.lpszText = dupprintf(absentmsg, keytype, fingerprint, appname);
+	mbox.lpszCaption = dupprintf(mbtitle, appname);
+	mbox.dwContextHelpId = HELPCTXID(errors_hostkey_absent);
+	mbox.dwStyle = MB_ICONWARNING | MB_YESNOCANCEL | MB_DEFBUTTON3 |
+	    help_button;
+	mbret = MessageBoxIndirect(&mbox);
+	sfree((void *)mbox.lpszText);
+	sfree((void *)mbox.lpszCaption);
 	if (mbret == IDYES)
 	    store_host_key(host, port, keytype, keystr);
 	if (mbret == IDCANCEL)