On Sun, 10 Jul 2011 06:55:32 -0500
[email protected] wrote:

> From: Shirish Pargaonkar <[email protected]>
> 
> 
> When using NTLMSSP authentication mechanism, if server mandates
> signing, keep the flags in type 3 messages of the NTLMSSP exchange
> same as in type 1 messages (i.e. keep the indicated capabilities same).
> 
> Some of the servers such as Samba, expect the flags such as
> Negotiate_Key_Exchange in type 3 message of NTLMSSP exchange as well.
> Some servers like Windows do not.
> 
> https://bugzilla.samba.org/show_bug.cgi?id=8212
> 
> 
> Signed-off-by: Shirish Pargaonkar <shirishpargaonkar@gmail>
> ---
>  fs/cifs/sess.c |   10 +++++-----
>  1 files changed, 5 insertions(+), 5 deletions(-)
> 
> diff --git a/fs/cifs/sess.c b/fs/cifs/sess.c
> index 3892ab8..d3e6196 100644
> --- a/fs/cifs/sess.c
> +++ b/fs/cifs/sess.c
> @@ -428,8 +428,7 @@ static void build_ntlmssp_negotiate_blob(unsigned char 
> *pbuffer,
>                       (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED)) {
>               flags |= NTLMSSP_NEGOTIATE_SIGN;
>               if (!ses->server->session_estab)
> -                     flags |= NTLMSSP_NEGOTIATE_KEY_XCH |
> -                             NTLMSSP_NEGOTIATE_EXTENDED_SEC;
> +                     flags |= NTLMSSP_NEGOTIATE_KEY_XCH;
>       }
>  
>       sec_blob->NegotiateFlags = cpu_to_le32(flags);
> @@ -465,10 +464,11 @@ static int build_ntlmssp_auth_blob(unsigned char 
> *pbuffer,
>               NTLMSSP_NEGOTIATE_128 | NTLMSSP_NEGOTIATE_UNICODE |
>               NTLMSSP_NEGOTIATE_NTLM | NTLMSSP_NEGOTIATE_EXTENDED_SEC;
>       if (ses->server->sec_mode &
> -        (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED))
> +        (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED)) {
>               flags |= NTLMSSP_NEGOTIATE_SIGN;
> -     if (ses->server->sec_mode & SECMODE_SIGN_REQUIRED)
> -             flags |= NTLMSSP_NEGOTIATE_ALWAYS_SIGN;
> +             if (!ses->server->session_estab)
> +                     flags |= NTLMSSP_NEGOTIATE_KEY_XCH;
> +     }
>  
>       tmp = pbuffer + sizeof(AUTHENTICATE_MESSAGE);
>       sec_blob->NegotiateFlags = cpu_to_le32(flags);

Looks reasonable...

Acked-by: Jeff Layton <[email protected]>
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