On Tue, Apr 18, 2023 at 09:40:11AM -0400, [email protected] wrote:
> From: Selva Nair <[email protected]>
>
> - We assume that all text passed to the management interface
> and written to log file are in Unicode (UTF-8). This is broken by
> the use of the ANSI version of FormatMessage() for Windows error
> messages. Fix by using FormatMessageW() and converting the UTF-16
> result to UTF-8.
>
> Github: fixes OpenVPN/openvpn#319
>
> Signed-off-by: Selva Nair <[email protected]>
> ---
> src/openvpn/error.c | 15 ++++++++++-----
> 1 file changed, 10 insertions(+), 5 deletions(-)
>
> diff --git a/src/openvpn/error.c b/src/openvpn/error.c
> index a2c9aa4c..ef821fcd 100644
> --- a/src/openvpn/error.c
> +++ b/src/openvpn/error.c
> @@ -970,19 +970,24 @@ strerror_win32(DWORD errnum, struct gc_arena *gc)
>
> /* format a windows error message */
> {
> - char message[256];
> + wchar_t wmessage[256];
> + char *message = NULL;
> struct buffer out = alloc_buf_gc(256, gc);
> - const int status = FormatMessage(
> + const int status = FormatMessageW(
According to the documentation the function returns DWORD, not int.
When we touch the code anyway, we should clean that up.
> FORMAT_MESSAGE_IGNORE_INSERTS
> | FORMAT_MESSAGE_FROM_SYSTEM
> | FORMAT_MESSAGE_ARGUMENT_ARRAY,
> NULL,
> errnum,
> 0,
> - message,
> - sizeof(message),
> + wmessage,
> + SIZE(wmessage),
> NULL);
> - if (!status)
> + if (status)
> + {
> + message = utf16to8(wmessage, gc);
> + }
> + if (!status || !message)
> {
> buf_printf(&out, "[Unknown Win32 Error]");
> }
> --
> 2.34.1
>
>
>
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--
Frank Lichtenheld
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