*/
#include "includes.h"
+#include "smbd/smbd.h"
#include "smbd/globals.h"
#include "../libcli/smb/smb_common.h"
#include "../libcli/auth/spnego.h"
-#include "ntlmssp.h"
+#include "../libcli/auth/ntlmssp.h"
+#include "ntlmssp_wrap.h"
+#include "../librpc/gen_ndr/krb5pac.h"
+#include "libads/kerberos_proto.h"
+#include "../lib/util/asn1.h"
static NTSTATUS smbd_smb2_session_setup(struct smbd_smb2_request *smb2req,
uint64_t in_session_id,
return 0;
}
+static NTSTATUS setup_ntlmssp_session_info(struct smbd_smb2_session *session,
+ NTSTATUS status)
+{
+ if (NT_STATUS_IS_OK(status)) {
+ status = auth_ntlmssp_steal_session_info(session,
+ session->auth_ntlmssp_state,
+ &session->session_info);
+ } else {
+ /* Note that this session_info won't have a session
+ * key. But for map to guest, that's exactly the right
+ * thing - we can't reasonably guess the key the
+ * client wants, as the password was wrong */
+ status = do_map_to_guest(status,
+ &session->session_info,
+ auth_ntlmssp_get_username(session->auth_ntlmssp_state),
+ auth_ntlmssp_get_domain(session->auth_ntlmssp_state));
+ }
+ return status;
+}
+
+#ifdef HAVE_KRB5
static NTSTATUS smbd_smb2_session_setup_krb5(struct smbd_smb2_session *session,
struct smbd_smb2_request *smb2req,
- const DATA_BLOB *psecblob_in,
- const char *kerb_mech,
+ uint8_t in_security_mode,
+ const DATA_BLOB *secblob,
+ const char *mechOID,
uint16_t *out_session_flags,
DATA_BLOB *out_security_buffer,
uint64_t *out_session_id)
{
- return NT_STATUS_NOT_IMPLEMENTED;
+ DATA_BLOB ap_rep = data_blob_null;
+ DATA_BLOB ap_rep_wrapped = data_blob_null;
+ DATA_BLOB ticket = data_blob_null;
+ DATA_BLOB session_key = data_blob_null;
+ DATA_BLOB secblob_out = data_blob_null;
+ uint8 tok_id[2];
+ struct PAC_LOGON_INFO *logon_info = NULL;
+ char *principal = NULL;
+ char *user = NULL;
+ char *domain = NULL;
+ struct passwd *pw = NULL;
+ NTSTATUS status;
+ char *real_username;
+ fstring tmp;
+ bool username_was_mapped = false;
+ bool map_domainuser_to_guest = false;
+
+ if (!spnego_parse_krb5_wrap(talloc_tos(), *secblob, &ticket, tok_id)) {
+ status = NT_STATUS_LOGON_FAILURE;
+ goto fail;
+ }
+
+ status = ads_verify_ticket(smb2req, lp_realm(), 0, &ticket,
+ &principal, &logon_info, &ap_rep,
+ &session_key, true);
+
+ if (!NT_STATUS_IS_OK(status)) {
+ DEBUG(1,("smb2: Failed to verify incoming ticket with error %s!\n",
+ nt_errstr(status)));
+ if (!NT_STATUS_EQUAL(status, NT_STATUS_TIME_DIFFERENCE_AT_DC)) {
+ status = NT_STATUS_LOGON_FAILURE;
+ }
+ goto fail;
+ }
+
+ status = get_user_from_kerberos_info(talloc_tos(),
+ smb2req->sconn->client_id.name,
+ principal, logon_info,
+ &username_was_mapped,
+ &map_domainuser_to_guest,
+ &user, &domain,
+ &real_username, &pw);
+ if (!NT_STATUS_IS_OK(status)) {
+ goto fail;
+ }
+
+ /* save the PAC data if we have it */
+ if (logon_info) {
+ netsamlogon_cache_store(user, &logon_info->info3);
+ }
+
+ /* setup the string used by %U */
+ sub_set_smb_name(real_username);
+
+ /* reload services so that the new %U is taken into account */
+ reload_services(smb2req->sconn->msg_ctx, smb2req->sconn->sock, true);
+
+ status = make_server_info_krb5(session,
+ user, domain, real_username, pw,
+ logon_info, map_domainuser_to_guest,
+ &session->session_info);
+ if (!NT_STATUS_IS_OK(status)) {
+ DEBUG(1, ("smb2: make_server_info_krb5 failed\n"));
+ goto fail;
+ }
+
+
+ session->session_info->nss_token |= username_was_mapped;
+
+ /* we need to build the token for the user. make_session_info_guest()
+ already does this */
+
+ if (!session->session_info->security_token ) {
+ status = create_local_token(session->session_info);
+ if (!NT_STATUS_IS_OK(status)) {
+ DEBUG(10,("smb2: failed to create local token: %s\n",
+ nt_errstr(status)));
+ goto fail;
+ }
+ }
+
+ if ((in_security_mode & SMB2_NEGOTIATE_SIGNING_REQUIRED) ||
+ lp_server_signing() == Required) {
+ session->do_signing = true;
+ }
+
+ if (session->session_info->guest) {
+ /* we map anonymous to guest internally */
+ *out_session_flags |= SMB2_SESSION_FLAG_IS_GUEST;
+ *out_session_flags |= SMB2_SESSION_FLAG_IS_NULL;
+ /* force no signing */
+ session->do_signing = false;
+ }
+
+ data_blob_free(&session->session_info->user_session_key);
+ session->session_info->user_session_key =
+ data_blob_talloc(
+ session->session_info,
+ session_key.data,
+ session_key.length);
+ if (session_key.length > 0) {
+ if (session->session_info->user_session_key.data == NULL) {
+ status = NT_STATUS_NO_MEMORY;
+ goto fail;
+ }
+ }
+ session->session_key = session->session_info->user_session_key;
+
+ session->compat_vuser = talloc_zero(session, user_struct);
+ if (session->compat_vuser == NULL) {
+ status = NT_STATUS_NO_MEMORY;
+ goto fail;
+ }
+ session->compat_vuser->auth_ntlmssp_state = NULL;
+ session->compat_vuser->homes_snum = -1;
+ session->compat_vuser->session_info = session->session_info;
+ session->compat_vuser->session_keystr = NULL;
+ session->compat_vuser->vuid = session->vuid;
+ DLIST_ADD(session->sconn->smb1.sessions.validated_users, session->compat_vuser);
+
+ /* This is a potentially untrusted username */
+ alpha_strcpy(tmp, user, ". _-$", sizeof(tmp));
+ session->session_info->sanitized_username =
+ talloc_strdup(session->session_info, tmp);
+
+ if (!session->session_info->guest) {
+ session->compat_vuser->homes_snum =
+ register_homes_share(session->session_info->unix_name);
+ }
+
+ if (!session_claim(session->sconn, session->compat_vuser)) {
+ DEBUG(1, ("smb2: Failed to claim session "
+ "for vuid=%d\n",
+ session->compat_vuser->vuid));
+ goto fail;
+ }
+
+ session->status = NT_STATUS_OK;
+
+ /*
+ * we attach the session to the request
+ * so that the response can be signed
+ */
+ smb2req->session = session;
+ if (session->do_signing) {
+ smb2req->do_signing = true;
+ }
+
+ global_client_caps |= (CAP_LEVEL_II_OPLOCKS|CAP_STATUS32);
+ status = NT_STATUS_OK;
+
+ /* wrap that up in a nice GSS-API wrapping */
+ ap_rep_wrapped = spnego_gen_krb5_wrap(talloc_tos(), ap_rep,
+ TOK_ID_KRB_AP_REP);
+
+ secblob_out = spnego_gen_auth_response(
+ talloc_tos(),
+ &ap_rep_wrapped,
+ status,
+ mechOID);
+
+ *out_security_buffer = data_blob_talloc(smb2req,
+ secblob_out.data,
+ secblob_out.length);
+ if (secblob_out.data && out_security_buffer->data == NULL) {
+ status = NT_STATUS_NO_MEMORY;
+ goto fail;
+ }
+
+ data_blob_free(&ap_rep);
+ data_blob_free(&ap_rep_wrapped);
+ data_blob_free(&ticket);
+ data_blob_free(&session_key);
+ data_blob_free(&secblob_out);
+
+ *out_session_id = session->vuid;
+
+ return NT_STATUS_OK;
+
+ fail:
+
+ data_blob_free(&ap_rep);
+ data_blob_free(&ap_rep_wrapped);
+ data_blob_free(&ticket);
+ data_blob_free(&session_key);
+ data_blob_free(&secblob_out);
+
+ ap_rep_wrapped = data_blob_null;
+ secblob_out = spnego_gen_auth_response(
+ talloc_tos(),
+ &ap_rep_wrapped,
+ status,
+ mechOID);
+
+ *out_security_buffer = data_blob_talloc(smb2req,
+ secblob_out.data,
+ secblob_out.length);
+ data_blob_free(&secblob_out);
+ return status;
}
+#endif
static NTSTATUS smbd_smb2_spnego_negotiate(struct smbd_smb2_session *session,
struct smbd_smb2_request *smb2req,
+ uint8_t in_security_mode,
DATA_BLOB in_security_buffer,
uint16_t *out_session_flags,
DATA_BLOB *out_security_buffer,
{
DATA_BLOB secblob_in = data_blob_null;
DATA_BLOB chal_out = data_blob_null;
- DATA_BLOB secblob_out = data_blob_null;
char *kerb_mech = NULL;
NTSTATUS status;
/* Ensure we have no old NTLM state around. */
- auth_ntlmssp_end(&session->auth_ntlmssp_state);
+ TALLOC_FREE(session->auth_ntlmssp_state);
- status = parse_spnego_mechanisms(in_security_buffer,
+ status = parse_spnego_mechanisms(talloc_tos(), in_security_buffer,
&secblob_in, &kerb_mech);
if (!NT_STATUS_IS_OK(status)) {
goto out;
USE_KERBEROS_KEYTAB) ) {
status = smbd_smb2_session_setup_krb5(session,
smb2req,
+ in_security_mode,
&secblob_in,
kerb_mech,
out_session_flags,
}
#endif
- status = auth_ntlmssp_start(&session->auth_ntlmssp_state);
- if (!NT_STATUS_IS_OK(status)) {
- goto out;
- }
+ if (kerb_mech) {
+ /* The mechtoken is a krb5 ticket, but
+ * we need to fall back to NTLM. */
- status = auth_ntlmssp_update(session->auth_ntlmssp_state,
- secblob_in,
- &chal_out);
+ DEBUG(3,("smb2: Got krb5 ticket in SPNEGO "
+ "but set to downgrade to NTLMSSP\n"));
+
+ status = NT_STATUS_MORE_PROCESSING_REQUIRED;
+ } else {
+ /* Fall back to NTLMSSP. */
+ status = auth_ntlmssp_start(&session->auth_ntlmssp_state);
+ if (!NT_STATUS_IS_OK(status)) {
+ goto out;
+ }
+
+ status = auth_ntlmssp_update(session->auth_ntlmssp_state,
+ secblob_in,
+ &chal_out);
+ }
if (!NT_STATUS_IS_OK(status) &&
!NT_STATUS_EQUAL(status,
goto out;
}
- secblob_out = spnego_gen_auth_response(&chal_out,
+ *out_security_buffer = spnego_gen_auth_response(smb2req,
+ &chal_out,
status,
OID_NTLMSSP);
- *out_security_buffer = data_blob_talloc(smb2req,
- secblob_out.data,
- secblob_out.length);
if (out_security_buffer->data == NULL) {
status = NT_STATUS_NO_MEMORY;
goto out;
out:
data_blob_free(&secblob_in);
- data_blob_free(&secblob_out);
data_blob_free(&chal_out);
- SAFE_FREE(kerb_mech);
+ TALLOC_FREE(kerb_mech);
if (!NT_STATUS_IS_OK(status) &&
!NT_STATUS_EQUAL(status,
NT_STATUS_MORE_PROCESSING_REQUIRED)) {
- auth_ntlmssp_end(&session->auth_ntlmssp_state);
+ TALLOC_FREE(session->auth_ntlmssp_state);
TALLOC_FREE(session);
}
return status;
struct smbd_smb2_request *smb2req,
uint8_t in_security_mode,
DATA_BLOB in_security_buffer,
- uint16_t *out_session_flags)
+ uint16_t *out_session_flags,
+ uint64_t *out_session_id)
{
+ fstring tmp;
+
if ((in_security_mode & SMB2_NEGOTIATE_SIGNING_REQUIRED) ||
lp_server_signing() == Required) {
session->do_signing = true;
}
- if (session->auth_ntlmssp_state->server_info->guest) {
+ if (session->session_info->guest) {
/* we map anonymous to guest internally */
*out_session_flags |= SMB2_SESSION_FLAG_IS_GUEST;
*out_session_flags |= SMB2_SESSION_FLAG_IS_NULL;
session->do_signing = false;
}
- session->server_info = session->auth_ntlmssp_state->server_info;
- data_blob_free(&session->server_info->user_session_key);
- session->server_info->user_session_key =
- data_blob_talloc(
- session->server_info,
- session->auth_ntlmssp_state->ntlmssp_state->session_key.data,
- session->auth_ntlmssp_state->ntlmssp_state->session_key.length);
- if (session->auth_ntlmssp_state->ntlmssp_state->session_key.length > 0) {
- if (session->server_info->user_session_key.data == NULL) {
- auth_ntlmssp_end(&session->auth_ntlmssp_state);
- TALLOC_FREE(session);
- return NT_STATUS_NO_MEMORY;
- }
- }
- session->session_key = session->server_info->user_session_key;
+ session->session_key = session->session_info->user_session_key;
session->compat_vuser = talloc_zero(session, user_struct);
if (session->compat_vuser == NULL) {
- auth_ntlmssp_end(&session->auth_ntlmssp_state);
+ TALLOC_FREE(session->auth_ntlmssp_state);
TALLOC_FREE(session);
return NT_STATUS_NO_MEMORY;
}
session->compat_vuser->auth_ntlmssp_state = session->auth_ntlmssp_state;
session->compat_vuser->homes_snum = -1;
- session->compat_vuser->server_info = session->server_info;
+ session->compat_vuser->session_info = session->session_info;
session->compat_vuser->session_keystr = NULL;
session->compat_vuser->vuid = session->vuid;
DLIST_ADD(session->sconn->smb1.sessions.validated_users, session->compat_vuser);
+ /* This is a potentially untrusted username */
+ alpha_strcpy(tmp,
+ auth_ntlmssp_get_username(session->auth_ntlmssp_state),
+ ". _-$",
+ sizeof(tmp));
+ session->session_info->sanitized_username = talloc_strdup(
+ session->session_info, tmp);
+
+ if (!session->compat_vuser->session_info->guest) {
+ session->compat_vuser->homes_snum =
+ register_homes_share(session->session_info->unix_name);
+ }
+
+ if (!session_claim(session->sconn, session->compat_vuser)) {
+ DEBUG(1, ("smb2: Failed to claim session "
+ "for vuid=%d\n",
+ session->compat_vuser->vuid));
+ TALLOC_FREE(session->auth_ntlmssp_state);
+ TALLOC_FREE(session);
+ return NT_STATUS_LOGON_FAILURE;
+ }
+
+
session->status = NT_STATUS_OK;
/*
}
global_client_caps |= (CAP_LEVEL_II_OPLOCKS|CAP_STATUS32);
+
+ *out_session_id = session->vuid;
+
return NT_STATUS_OK;
}
{
DATA_BLOB auth = data_blob_null;
DATA_BLOB auth_out = data_blob_null;
- DATA_BLOB secblob_out = data_blob_null;
NTSTATUS status;
- if (!spnego_parse_auth(in_security_buffer, &auth)) {
+ if (!spnego_parse_auth(talloc_tos(), in_security_buffer, &auth)) {
TALLOC_FREE(session);
return NT_STATUS_LOGON_FAILURE;
}
+ if (auth.data[0] == ASN1_APPLICATION(0)) {
+ /* Might be a second negTokenTarg packet */
+ DATA_BLOB secblob_in = data_blob_null;
+ char *kerb_mech = NULL;
+
+ status = parse_spnego_mechanisms(talloc_tos(),
+ in_security_buffer,
+ &secblob_in, &kerb_mech);
+ if (!NT_STATUS_IS_OK(status)) {
+ TALLOC_FREE(session);
+ return status;
+ }
+
+#ifdef HAVE_KRB5
+ if (kerb_mech && ((lp_security()==SEC_ADS) ||
+ USE_KERBEROS_KEYTAB) ) {
+ status = smbd_smb2_session_setup_krb5(session,
+ smb2req,
+ in_security_mode,
+ &secblob_in,
+ kerb_mech,
+ out_session_flags,
+ out_security_buffer,
+ out_session_id);
+
+ data_blob_free(&secblob_in);
+ TALLOC_FREE(kerb_mech);
+ if (!NT_STATUS_IS_OK(status)) {
+ TALLOC_FREE(session);
+ }
+ return status;
+ }
+#endif
+
+ /* Can't blunder into NTLMSSP auth if we have
+ * a krb5 ticket. */
+
+ if (kerb_mech) {
+ DEBUG(3,("smb2: network "
+ "misconfiguration, client sent us a "
+ "krb5 ticket and kerberos security "
+ "not enabled\n"));
+ TALLOC_FREE(session);
+ data_blob_free(&secblob_in);
+ TALLOC_FREE(kerb_mech);
+ return NT_STATUS_LOGON_FAILURE;
+ }
+
+ data_blob_free(&secblob_in);
+ }
+
+ if (session->auth_ntlmssp_state == NULL) {
+ status = auth_ntlmssp_start(&session->auth_ntlmssp_state);
+ if (!NT_STATUS_IS_OK(status)) {
+ data_blob_free(&auth);
+ TALLOC_FREE(session);
+ return status;
+ }
+ }
+
status = auth_ntlmssp_update(session->auth_ntlmssp_state,
auth,
&auth_out);
- if (!NT_STATUS_IS_OK(status)) {
- auth_ntlmssp_end(&session->auth_ntlmssp_state);
+ /* We need to call setup_ntlmssp_session_info() if status==NT_STATUS_OK,
+ or if status is anything except NT_STATUS_MORE_PROCESSING_REQUIRED,
+ as this can trigger map to guest. */
+ if (!NT_STATUS_EQUAL(status, NT_STATUS_MORE_PROCESSING_REQUIRED)) {
+ status = setup_ntlmssp_session_info(session, status);
+ }
+
+ if (!NT_STATUS_IS_OK(status) &&
+ !NT_STATUS_EQUAL(status, NT_STATUS_MORE_PROCESSING_REQUIRED)) {
+ TALLOC_FREE(session->auth_ntlmssp_state);
data_blob_free(&auth);
TALLOC_FREE(session);
return status;
data_blob_free(&auth);
- secblob_out = spnego_gen_auth_response(&auth_out,
- status, NULL);
+ *out_security_buffer = spnego_gen_auth_response(smb2req,
+ &auth_out, status, NULL);
- *out_security_buffer = data_blob_talloc(smb2req,
- secblob_out.data,
- secblob_out.length);
if (out_security_buffer->data == NULL) {
- auth_ntlmssp_end(&session->auth_ntlmssp_state);
+ TALLOC_FREE(session->auth_ntlmssp_state);
TALLOC_FREE(session);
return NT_STATUS_NO_MEMORY;
}
*out_session_id = session->vuid;
+ if (NT_STATUS_EQUAL(status, NT_STATUS_MORE_PROCESSING_REQUIRED)) {
+ return NT_STATUS_MORE_PROCESSING_REQUIRED;
+ }
+
+ /* We're done - claim the session. */
return smbd_smb2_common_ntlmssp_auth_return(session,
smb2req,
in_security_mode,
in_security_buffer,
- out_session_flags);
+ out_session_flags,
+ out_session_id);
}
static NTSTATUS smbd_smb2_raw_ntlmssp_auth(struct smbd_smb2_session *session,
*out_security_buffer = data_blob_talloc(smb2req,
secblob_out.data,
secblob_out.length);
- if (out_security_buffer->data == NULL) {
- auth_ntlmssp_end(&session->auth_ntlmssp_state);
+ if (secblob_out.data && out_security_buffer->data == NULL) {
+ TALLOC_FREE(session->auth_ntlmssp_state);
TALLOC_FREE(session);
return NT_STATUS_NO_MEMORY;
}
*out_session_id = session->vuid;
return status;
}
+
+ status = setup_ntlmssp_session_info(session, status);
+
if (!NT_STATUS_IS_OK(status)) {
- auth_ntlmssp_end(&session->auth_ntlmssp_state);
+ TALLOC_FREE(session->auth_ntlmssp_state);
TALLOC_FREE(session);
return status;
}
smb2req,
in_security_mode,
in_security_buffer,
- out_session_flags);
+ out_session_flags,
+ out_session_id);
}
static NTSTATUS smbd_smb2_session_setup(struct smbd_smb2_request *smb2req,
if (in_security_buffer.data[0] == ASN1_APPLICATION(0)) {
return smbd_smb2_spnego_negotiate(session,
smb2req,
+ in_security_mode,
in_security_buffer,
out_session_flags,
out_security_buffer,
/* Unknown packet type. */
DEBUG(1,("Unknown packet type %u in smb2 sessionsetup\n",
(unsigned int)in_security_buffer.data[0] ));
- auth_ntlmssp_end(&session->auth_ntlmssp_state);
+ TALLOC_FREE(session->auth_ntlmssp_state);
TALLOC_FREE(session);
return NT_STATUS_LOGON_FAILURE;
}
return NT_STATUS_ACCESS_DENIED;
}
- set_current_user_info(session->server_info->sanitized_username,
- session->server_info->unix_name,
- pdb_get_domain(session->server_info->sam_account));
+ set_current_user_info(session->session_info->sanitized_username,
+ session->session_info->unix_name,
+ session->session_info->info3->base.domain.string);
req->session = session;
git.samba.org / amitay / samba.git / blobdiff