}
#endif
-int
-SMB2_sess_setup(const unsigned int xid, struct cifs_ses *ses,
- const struct nls_table *nls_cp)
+static void
+SMB2_sess_auth_rawntlmssp_authenticate(struct SMB2_sess_data *sess_data);
+
+static void
+SMB2_sess_auth_rawntlmssp_negotiate(struct SMB2_sess_data *sess_data)
{
- struct smb2_sess_setup_req *req;
+ int rc;
+ struct cifs_ses *ses = sess_data->ses;
struct smb2_sess_setup_rsp *rsp = NULL;
- struct kvec iov[2];
- int rc = 0;
- int resp_buftype = CIFS_NO_BUFFER;
- __le32 phase = NtLmNegotiate; /* NTLMSSP, if needed, is multistage */
- struct TCP_Server_Info *server = ses->server;
- u16 blob_length = 0;
- char *security_blob = NULL;
- unsigned char *ntlmssp_blob = NULL;
+ char *ntlmssp_blob = NULL;
bool use_spnego = false; /* else use raw ntlmssp */
- u64 previous_session = ses->Suid;
- struct SMB2_sess_data *sess_data;
-
- cifs_dbg(FYI, "Session Setup\n");
-
- if (!server) {
- WARN(1, "%s: server is NULL!\n", __func__);
- return -EIO;
- }
-
- sess_data = kzalloc(sizeof(struct SMB2_sess_data), GFP_KERNEL);
- if (!sess_data)
- return -ENOMEM;
- sess_data->xid = xid;
- sess_data->ses = ses;
- sess_data->buf0_type = CIFS_NO_BUFFER;
- sess_data->nls_cp = (struct nls_table *) nls_cp;
- sess_data->previous_session = ses->Suid;
-
- if (ses->sectype == Kerberos) {
- SMB2_auth_kerberos(sess_data);
- goto out;
- }
-
- /*
- * If we are here due to reconnect, free per-smb session key
- * in case signing was required.
- */
- kfree(ses->auth_key.response);
- ses->auth_key.response = NULL;
+ u16 blob_length = 0;
/*
* If memory allocation is successful, caller of this function
* frees it.
*/
ses->ntlmssp = kmalloc(sizeof(struct ntlmssp_auth), GFP_KERNEL);
- if (!ses->ntlmssp)
- return -ENOMEM;
+ if (!ses->ntlmssp) {
+ rc = -ENOMEM;
+ goto out_err;
+ }
ses->ntlmssp->sesskey_per_smbsess = true;
- /* FIXME: allow for other auth types besides NTLMSSP (e.g. krb5) */
- if (ses->sectype != Kerberos && ses->sectype != RawNTLMSSP)
- ses->sectype = RawNTLMSSP;
-
-ssetup_ntlmssp_authenticate:
- if (phase == NtLmChallenge)
- phase = NtLmAuthenticate; /* if ntlmssp, now final phase */
-
- rc = small_smb2_init(SMB2_SESSION_SETUP, NULL, (void **) &req);
+ rc = SMB2_sess_alloc_buffer(sess_data);
if (rc)
- return rc;
-
- req->hdr.SessionId = 0; /* First session, not a reauthenticate */
+ goto out_err;
- /* if reconnect, we need to send previous sess id, otherwise it is 0 */
- req->PreviousSessionId = previous_session;
+ ntlmssp_blob = kmalloc(sizeof(struct _NEGOTIATE_MESSAGE),
+ GFP_KERNEL);
+ if (ntlmssp_blob == NULL) {
+ rc = -ENOMEM;
+ goto out;
+ }
- req->Flags = 0; /* MBZ */
- /* to enable echos and oplocks */
- req->hdr.CreditRequest = cpu_to_le16(3);
+ build_ntlmssp_negotiate_blob(ntlmssp_blob, ses);
+ if (use_spnego) {
+ /* BB eventually need to add this */
+ cifs_dbg(VFS, "spnego not supported for SMB2 yet\n");
+ rc = -EOPNOTSUPP;
+ goto out;
+ } else {
+ blob_length = sizeof(struct _NEGOTIATE_MESSAGE);
+ /* with raw NTLMSSP we don't encapsulate in SPNEGO */
+ }
+ sess_data->iov[1].iov_base = ntlmssp_blob;
+ sess_data->iov[1].iov_len = blob_length;
- /* only one of SMB2 signing flags may be set in SMB2 request */
- if (server->sign)
- req->SecurityMode = SMB2_NEGOTIATE_SIGNING_REQUIRED;
- else if (global_secflags & CIFSSEC_MAY_SIGN) /* one flag unlike MUST_ */
- req->SecurityMode = SMB2_NEGOTIATE_SIGNING_ENABLED;
- else
- req->SecurityMode = 0;
+ rc = SMB2_sess_sendreceive(sess_data);
+ rsp = (struct smb2_sess_setup_rsp *)sess_data->iov[0].iov_base;
- req->Capabilities = 0;
- req->Channel = 0; /* MBZ */
+ /* If true, rc here is expected and not an error */
+ if (sess_data->buf0_type != CIFS_NO_BUFFER &&
+ rsp->hdr.Status == STATUS_MORE_PROCESSING_REQUIRED)
+ rc = 0;
- iov[0].iov_base = (char *)req;
- /* 4 for rfc1002 length field and 1 for pad */
- iov[0].iov_len = get_rfc1002_length(req) + 4 - 1;
+ if (rc)
+ goto out;
- if (phase == NtLmNegotiate) {
- ntlmssp_blob = kmalloc(sizeof(struct _NEGOTIATE_MESSAGE),
- GFP_KERNEL);
- if (ntlmssp_blob == NULL) {
- rc = -ENOMEM;
- goto ssetup_exit;
- }
- build_ntlmssp_negotiate_blob(ntlmssp_blob, ses);
- if (use_spnego) {
- /* blob_length = build_spnego_ntlmssp_blob(
- &security_blob,
- sizeof(struct _NEGOTIATE_MESSAGE),
- ntlmssp_blob); */
- /* BB eventually need to add this */
- cifs_dbg(VFS, "spnego not supported for SMB2 yet\n");
- rc = -EOPNOTSUPP;
- kfree(ntlmssp_blob);
- goto ssetup_exit;
- } else {
- blob_length = sizeof(struct _NEGOTIATE_MESSAGE);
- /* with raw NTLMSSP we don't encapsulate in SPNEGO */
- security_blob = ntlmssp_blob;
- }
- iov[1].iov_base = security_blob;
- iov[1].iov_len = blob_length;
- } else if (phase == NtLmAuthenticate) {
- req->hdr.SessionId = ses->Suid;
- rc = build_ntlmssp_auth_blob(&ntlmssp_blob, &blob_length, ses,
- nls_cp);
- if (rc) {
- cifs_dbg(FYI, "build_ntlmssp_auth_blob failed %d\n",
- rc);
- goto ssetup_exit; /* BB double check error handling */
- }
- if (use_spnego) {
- /* blob_length = build_spnego_ntlmssp_blob(
- &security_blob,
- blob_length,
- ntlmssp_blob); */
- cifs_dbg(VFS, "spnego not supported for SMB2 yet\n");
- rc = -EOPNOTSUPP;
- kfree(ntlmssp_blob);
- goto ssetup_exit;
- } else {
- security_blob = ntlmssp_blob;
- }
- iov[1].iov_base = security_blob;
- iov[1].iov_len = blob_length;
- } else {
- cifs_dbg(VFS, "illegal ntlmssp phase\n");
+ if (offsetof(struct smb2_sess_setup_rsp, Buffer) - 4 !=
+ le16_to_cpu(rsp->SecurityBufferOffset)) {
+ cifs_dbg(VFS, "Invalid security buffer offset %d\n",
+ le16_to_cpu(rsp->SecurityBufferOffset));
rc = -EIO;
- goto ssetup_exit;
+ goto out;
}
+ rc = decode_ntlmssp_challenge(rsp->Buffer,
+ le16_to_cpu(rsp->SecurityBufferLength), ses);
+ if (rc)
+ goto out;
- /* Testing shows that buffer offset must be at location of Buffer[0] */
- req->SecurityBufferOffset =
- cpu_to_le16(sizeof(struct smb2_sess_setup_req) -
- 1 /* pad */ - 4 /* rfc1001 len */);
- req->SecurityBufferLength = cpu_to_le16(blob_length);
+ cifs_dbg(FYI, "rawntlmssp session setup challenge phase\n");
- inc_rfc1001_len(req, blob_length - 1 /* pad */);
- /* BB add code to build os and lm fields */
+ ses->Suid = rsp->hdr.SessionId;
+ ses->session_flags = le16_to_cpu(rsp->SessionFlags);
+ if (ses->session_flags & SMB2_SESSION_FLAG_ENCRYPT_DATA)
+ cifs_dbg(VFS, "SMB3 encryption not supported yet\n");
- rc = SendReceive2(xid, ses, iov, 2, &resp_buftype,
- CIFS_LOG_ERROR | CIFS_NEG_OP);
+out:
+ kfree(ntlmssp_blob);
+ SMB2_sess_free_buffer(sess_data);
+ if (!rc) {
+ sess_data->result = 0;
+ sess_data->func = SMB2_sess_auth_rawntlmssp_authenticate;
+ return;
+ }
+out_err:
+ kfree(ses->ntlmssp);
+ ses->ntlmssp = NULL;
+ sess_data->result = rc;
+ sess_data->func = NULL;
+}
- kfree(security_blob);
- rsp = (struct smb2_sess_setup_rsp *)iov[0].iov_base;
- ses->Suid = rsp->hdr.SessionId;
- if (resp_buftype != CIFS_NO_BUFFER &&
- rsp->hdr.Status == STATUS_MORE_PROCESSING_REQUIRED) {
- if (phase != NtLmNegotiate) {
- cifs_dbg(VFS, "Unexpected more processing error\n");
- goto ssetup_exit;
- }
- if (offsetof(struct smb2_sess_setup_rsp, Buffer) - 4 !=
- le16_to_cpu(rsp->SecurityBufferOffset)) {
- cifs_dbg(VFS, "Invalid security buffer offset %d\n",
- le16_to_cpu(rsp->SecurityBufferOffset));
- rc = -EIO;
- goto ssetup_exit;
- }
+static void
+SMB2_sess_auth_rawntlmssp_authenticate(struct SMB2_sess_data *sess_data)
+{
+ int rc;
+ struct cifs_ses *ses = sess_data->ses;
+ struct smb2_sess_setup_req *req;
+ struct smb2_sess_setup_rsp *rsp = NULL;
+ unsigned char *ntlmssp_blob = NULL;
+ bool use_spnego = false; /* else use raw ntlmssp */
+ u16 blob_length = 0;
+
+ rc = SMB2_sess_alloc_buffer(sess_data);
+ if (rc)
+ goto out;
+
+ req = (struct smb2_sess_setup_req *) sess_data->iov[0].iov_base;
+ req->hdr.SessionId = ses->Suid;
- /* NTLMSSP Negotiate sent now processing challenge (response) */
- phase = NtLmChallenge; /* process ntlmssp challenge */
- rc = 0; /* MORE_PROCESSING is not an error here but expected */
- rc = decode_ntlmssp_challenge(rsp->Buffer,
- le16_to_cpu(rsp->SecurityBufferLength), ses);
+ rc = build_ntlmssp_auth_blob(&ntlmssp_blob, &blob_length, ses,
+ sess_data->nls_cp);
+ if (rc) {
+ cifs_dbg(FYI, "build_ntlmssp_auth_blob failed %d\n", rc);
+ goto out;
}
- /*
- * BB eventually add code for SPNEGO decoding of NtlmChallenge blob,
- * but at least the raw NTLMSSP case works.
- */
- /*
- * No tcon so can't do
- * cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_fail[SMB2...]);
- */
- if (rc != 0)
- goto ssetup_exit;
+ if (use_spnego) {
+ /* BB eventually need to add this */
+ cifs_dbg(VFS, "spnego not supported for SMB2 yet\n");
+ rc = -EOPNOTSUPP;
+ goto out;
+ }
+ sess_data->iov[1].iov_base = ntlmssp_blob;
+ sess_data->iov[1].iov_len = blob_length;
+
+ rc = SMB2_sess_sendreceive(sess_data);
+ if (rc)
+ goto out;
+
+ rsp = (struct smb2_sess_setup_rsp *)sess_data->iov[0].iov_base;
+ ses->Suid = rsp->hdr.SessionId;
ses->session_flags = le16_to_cpu(rsp->SessionFlags);
if (ses->session_flags & SMB2_SESSION_FLAG_ENCRYPT_DATA)
cifs_dbg(VFS, "SMB3 encryption not supported yet\n");
-ssetup_exit:
- free_rsp_buf(resp_buftype, rsp);
- /* if ntlmssp, and negotiate succeeded, proceed to authenticate phase */
- if ((phase == NtLmChallenge) && (rc == 0))
- goto ssetup_ntlmssp_authenticate;
+ rc = SMB2_sess_establish_session(sess_data);
+out:
+ kfree(ntlmssp_blob);
+ SMB2_sess_free_buffer(sess_data);
+ kfree(ses->ntlmssp);
+ ses->ntlmssp = NULL;
+ sess_data->result = rc;
+ sess_data->func = NULL;
+}
- if (!rc) {
- mutex_lock(&server->srv_mutex);
- if (server->sign && 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");
- mutex_unlock(&server->srv_mutex);
- goto keygen_exit;
- }
- }
- if (!server->session_estab) {
- server->sequence_number = 0x2;
- server->session_estab = true;
- }
- mutex_unlock(&server->srv_mutex);
+static int
+SMB2_select_sec(struct cifs_ses *ses, struct SMB2_sess_data *sess_data)
+{
+ if (ses->sectype != Kerberos && ses->sectype != RawNTLMSSP)
+ ses->sectype = RawNTLMSSP;
- cifs_dbg(FYI, "SMB2/3 session established successfully\n");
- spin_lock(&GlobalMid_Lock);
- ses->status = CifsGood;
- ses->need_reconnect = false;
- spin_unlock(&GlobalMid_Lock);
+ switch (ses->sectype) {
+ case Kerberos:
+ sess_data->func = SMB2_auth_kerberos;
+ break;
+ case RawNTLMSSP:
+ sess_data->func = SMB2_sess_auth_rawntlmssp_negotiate;
+ break;
+ default:
+ cifs_dbg(VFS, "secType %d not supported!\n", ses->sectype);
+ return -EOPNOTSUPP;
}
-keygen_exit:
- if (!server->sign) {
- kfree(ses->auth_key.response);
- ses->auth_key.response = NULL;
+ return 0;
+}
+
+int
+SMB2_sess_setup(const unsigned int xid, struct cifs_ses *ses,
+ const struct nls_table *nls_cp)
+{
+ int rc = 0;
+ struct TCP_Server_Info *server = ses->server;
+ struct SMB2_sess_data *sess_data;
+
+ cifs_dbg(FYI, "Session Setup\n");
+
+ if (!server) {
+ WARN(1, "%s: server is NULL!\n", __func__);
+ return -EIO;
}
- kfree(ses->ntlmssp);
- return rc;
-out:
+ sess_data = kzalloc(sizeof(struct SMB2_sess_data), GFP_KERNEL);
+ if (!sess_data)
+ return -ENOMEM;
+
+ rc = SMB2_select_sec(ses, sess_data);
+ if (rc)
+ goto out;
+ sess_data->xid = xid;
+ sess_data->ses = ses;
+ sess_data->buf0_type = CIFS_NO_BUFFER;
+ sess_data->nls_cp = (struct nls_table *) nls_cp;
+
+ while (sess_data->func)
+ sess_data->func(sess_data);
+
rc = sess_data->result;
+out:
kfree(sess_data);
return rc;
}
projects / cascardo / linux.git / commitdiff