diff options
| author | Pavel Shilovsky <pshilov@microsoft.com> | 2016-11-07 18:20:50 -0800 |
|---|---|---|
| committer | Ben Hutchings <ben@decadent.org.uk> | 2019-04-04 16:14:12 +0100 |
| commit | cbf513cb2080cc507f4b1f2d1a95141e64c87db3 (patch) | |
| tree | 3b68ee6f76606f2e667aa4577ec73f7896f449ea | |
| parent | 553ae0f9207b1779e4da88b53f3a1f0cb0c127c6 (diff) | |
CIFS: Enable encryption during session setup phase
commit cabfb3680f78981d26c078a26e5c748531257ebb upstream.
In order to allow encryption on SMB connection we need to exchange
a session key and generate encryption and decryption keys.
Signed-off-by: Pavel Shilovsky <pshilov@microsoft.com>
[bwh: Backported to 3.16:
- SMB2_sess_establish_session() has not been split out from SMB2_sess_setup()
and there is additional cleanup to do on error, so keep the
'goto keygen_exit'
- Adjust context]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
| -rw-r--r-- | fs/cifs/sess.c | 22 | ||||
| -rw-r--r-- | fs/cifs/smb2pdu.c | 8 |
2 files changed, 11 insertions, 19 deletions
diff --git a/fs/cifs/sess.c b/fs/cifs/sess.c index 7426b06741ce..d7218c16ba70 100644 --- a/fs/cifs/sess.c +++ b/fs/cifs/sess.c @@ -343,13 +343,12 @@ void build_ntlmssp_negotiate_blob(unsigned char *pbuffer, /* BB is NTLMV2 session security format easier to use here? */ flags = NTLMSSP_NEGOTIATE_56 | NTLMSSP_REQUEST_TARGET | NTLMSSP_NEGOTIATE_128 | NTLMSSP_NEGOTIATE_UNICODE | - NTLMSSP_NEGOTIATE_NTLM | NTLMSSP_NEGOTIATE_EXTENDED_SEC; - if (ses->server->sign) { + NTLMSSP_NEGOTIATE_NTLM | NTLMSSP_NEGOTIATE_EXTENDED_SEC | + NTLMSSP_NEGOTIATE_SEAL; + if (ses->server->sign) flags |= NTLMSSP_NEGOTIATE_SIGN; - if (!ses->server->session_estab || - ses->ntlmssp->sesskey_per_smbsess) - flags |= NTLMSSP_NEGOTIATE_KEY_XCH; - } + if (!ses->server->session_estab || ses->ntlmssp->sesskey_per_smbsess) + flags |= NTLMSSP_NEGOTIATE_KEY_XCH; sec_blob->NegotiateFlags = cpu_to_le32(flags); @@ -412,13 +411,12 @@ int build_ntlmssp_auth_blob(unsigned char **pbuffer, flags = NTLMSSP_NEGOTIATE_56 | NTLMSSP_REQUEST_TARGET | NTLMSSP_NEGOTIATE_TARGET_INFO | NTLMSSP_NEGOTIATE_128 | NTLMSSP_NEGOTIATE_UNICODE | - NTLMSSP_NEGOTIATE_NTLM | NTLMSSP_NEGOTIATE_EXTENDED_SEC; - if (ses->server->sign) { + NTLMSSP_NEGOTIATE_NTLM | NTLMSSP_NEGOTIATE_EXTENDED_SEC | + NTLMSSP_NEGOTIATE_SEAL; + if (ses->server->sign) flags |= NTLMSSP_NEGOTIATE_SIGN; - if (!ses->server->session_estab || - ses->ntlmssp->sesskey_per_smbsess) - flags |= NTLMSSP_NEGOTIATE_KEY_XCH; - } + if (!ses->server->session_estab || ses->ntlmssp->sesskey_per_smbsess) + flags |= NTLMSSP_NEGOTIATE_KEY_XCH; tmp = *pbuffer + sizeof(AUTHENTICATE_MESSAGE); sec_blob->NegotiateFlags = cpu_to_le32(flags); diff --git a/fs/cifs/smb2pdu.c b/fs/cifs/smb2pdu.c index 219fdc07aa6b..6a5b70240a08 100644 --- a/fs/cifs/smb2pdu.c +++ b/fs/cifs/smb2pdu.c @@ -764,10 +764,8 @@ ssetup_exit: if (!rc) { mutex_lock(&server->srv_mutex); - if (server->sign && server->ops->generate_signingkey) { + if (server->ops->generate_signingkey) { rc = server->ops->generate_signingkey(ses); - kfree(ses->auth_key.response); - ses->auth_key.response = NULL; if (rc) { cifs_dbg(FYI, "SMB3 session key generation failed\n"); @@ -789,10 +787,6 @@ ssetup_exit: } keygen_exit: - if (!server->sign) { - kfree(ses->auth_key.response); - ses->auth_key.response = NULL; - } kfree(ses->ntlmssp); return rc; |