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authorShirish Pargaonkar <shirishpargaonkar@gmail.com>2013-08-29 17:35:10 +0400
committerSteve French <smfrench@gmail.com>2013-09-08 23:47:49 +0400
commit5c234aa5e33ed9037354a4c94d0d3e0350abe5eb (patch)
tree8576ec4eb00a2adca7517d6bee0bc4a781c21ab8 /fs/cifs/sess.c
parentd4e63bd6e40da30e965e8947b98ba75c6b973c62 (diff)
downloadlinux-5c234aa5e33ed9037354a4c94d0d3e0350abe5eb.tar.xz
cifs: Add a variable specific to NTLMSSP for key exchange.
Add a variable specific to NTLMSSP authentication to determine whether to exchange keys during negotiation and authentication phases. Since session key for smb1 is per smb connection, once a very first sesion is established, there is no need for key exchange during subsequent session setups. As a result, smb1 session setup code sets this variable as false. Since session key for smb2 and smb3 is per smb connection, we need to exchange keys to generate session key for every sesion being established. As a result, smb2/3 session setup code sets this variable as true. Acked-by: Jeff Layton <jlayton@samba.org> Signed-off-by: Shirish Pargaonkar <shirishpargaonkar@gmail.com> Signed-off-by: Steve French <smfrench@gmail.com>
Diffstat (limited to 'fs/cifs/sess.c')
-rw-r--r--fs/cifs/sess.c8
1 files changed, 6 insertions, 2 deletions
diff --git a/fs/cifs/sess.c b/fs/cifs/sess.c
index acea6c4ded47..5f99b7f19e78 100644
--- a/fs/cifs/sess.c
+++ b/fs/cifs/sess.c
@@ -428,7 +428,8 @@ void build_ntlmssp_negotiate_blob(unsigned char *pbuffer,
NTLMSSP_NEGOTIATE_NTLM | NTLMSSP_NEGOTIATE_EXTENDED_SEC;
if (ses->server->sign) {
flags |= NTLMSSP_NEGOTIATE_SIGN;
- if (!ses->server->session_estab)
+ if (!ses->server->session_estab ||
+ ses->ntlmssp->sesskey_per_smbsess)
flags |= NTLMSSP_NEGOTIATE_KEY_XCH;
}
@@ -466,7 +467,8 @@ int build_ntlmssp_auth_blob(unsigned char *pbuffer,
NTLMSSP_NEGOTIATE_NTLM | NTLMSSP_NEGOTIATE_EXTENDED_SEC;
if (ses->server->sign) {
flags |= NTLMSSP_NEGOTIATE_SIGN;
- if (!ses->server->session_estab)
+ if (!ses->server->session_estab ||
+ ses->ntlmssp->sesskey_per_smbsess)
flags |= NTLMSSP_NEGOTIATE_KEY_XCH;
}
@@ -641,6 +643,8 @@ CIFS_SessSetup(const unsigned int xid, struct cifs_ses *ses,
ses->ntlmssp = kmalloc(sizeof(struct ntlmssp_auth), GFP_KERNEL);
if (!ses->ntlmssp)
return -ENOMEM;
+ ses->ntlmssp->sesskey_per_smbsess = false;
+
}
ssetup_ntlmssp_authenticate: