static NTSTATUS smbd_smb2_reauth_generic_return(struct smbXsrv_session *session, struct smbd_smb2_request *smb2req, struct auth_session_info *session_info, uint16_t *out_session_flags, uint64_t *out_session_id) { NTSTATUS status; struct smbXsrv_session *x = session; data_blob_clear_free(&session_info->session_key); session_info->session_key = data_blob_dup_talloc(session_info, x->global->application_key); if (session_info->session_key.data == NULL) { return NT_STATUS_NO_MEMORY; } session->compat->session_info = session_info; session->compat->vuid = session->global->session_wire_id; session->compat->homes_snum = register_homes_share(session_info->unix_info->unix_name); set_current_user_info(session_info->unix_info->sanitized_username, session_info->unix_info->unix_name, session_info->info->domain_name); reload_services(smb2req->sconn, conn_snum_used, true); session->status = NT_STATUS_OK; TALLOC_FREE(session->global->auth_session_info); session->global->auth_session_info = session_info; session->global->auth_session_info_seqnum += 1; session->global->channels[0].auth_session_info_seqnum = session->global->auth_session_info_seqnum; session->global->auth_time = timeval_to_nttime(&smb2req->request_time); session->global->expiration_time = gensec_expire_time(session->gensec); status = smbXsrv_session_update(session); if (!NT_STATUS_IS_OK(status)) { DEBUG(0, ("smb2: Failed to update session for vuid=%llu - %s\n", (unsigned long long)session->compat->vuid, nt_errstr(status))); return NT_STATUS_LOGON_FAILURE; } conn_clear_vuid_caches(smb2req->sconn, session->compat->vuid); if (security_session_user_level(session_info, NULL) >= SECURITY_USER) { smb2req->do_signing = true; } *out_session_id = session->global->session_wire_id; return NT_STATUS_OK; }
static void reply_sesssetup_and_X_spnego(struct smb_request *req) { const uint8_t *p; DATA_BLOB in_blob; DATA_BLOB out_blob = data_blob_null; size_t bufrem; char *tmp; const char *native_os; const char *native_lanman; const char *primary_domain; uint16_t data_blob_len = SVAL(req->vwv+7, 0); enum remote_arch_types ra_type = get_remote_arch(); uint64_t vuid = req->vuid; NTSTATUS status = NT_STATUS_OK; struct smbXsrv_connection *xconn = req->xconn; struct smbd_server_connection *sconn = req->sconn; uint16_t action = 0; bool is_authenticated = false; NTTIME now = timeval_to_nttime(&req->request_time); struct smbXsrv_session *session = NULL; uint16_t smb_bufsize = SVAL(req->vwv+2, 0); uint32_t client_caps = IVAL(req->vwv+10, 0); struct smbXsrv_session_auth0 *auth; DEBUG(3,("Doing spnego session setup\n")); if (!xconn->smb1.sessions.done_sesssetup) { global_client_caps = client_caps; if (!(global_client_caps & CAP_STATUS32)) { remove_from_common_flags2(FLAGS2_32_BIT_ERROR_CODES); } } p = req->buf; if (data_blob_len == 0) { /* an invalid request */ reply_nterror(req, nt_status_squash(NT_STATUS_LOGON_FAILURE)); return; } bufrem = smbreq_bufrem(req, p); /* pull the spnego blob */ in_blob = data_blob_const(p, MIN(bufrem, data_blob_len)); #if 0 file_save("negotiate.dat", in_blob.data, in_blob.length); #endif p = req->buf + in_blob.length; p += srvstr_pull_req_talloc(talloc_tos(), req, &tmp, p, STR_TERMINATE); native_os = tmp ? tmp : ""; p += srvstr_pull_req_talloc(talloc_tos(), req, &tmp, p, STR_TERMINATE); native_lanman = tmp ? tmp : ""; p += srvstr_pull_req_talloc(talloc_tos(), req, &tmp, p, STR_TERMINATE); primary_domain = tmp ? tmp : ""; DEBUG(3,("NativeOS=[%s] NativeLanMan=[%s] PrimaryDomain=[%s]\n", native_os, native_lanman, primary_domain)); if ( ra_type == RA_WIN2K ) { /* Vista sets neither the OS or lanman strings */ if ( !strlen(native_os) && !strlen(native_lanman) ) set_remote_arch(RA_VISTA); /* Windows 2003 doesn't set the native lanman string, but does set primary domain which is a bug I think */ if ( !strlen(native_lanman) ) { ra_lanman_string( primary_domain ); } else { ra_lanman_string( native_lanman ); } } else if ( ra_type == RA_VISTA ) { if ( strncmp(native_os, "Mac OS X", 8) == 0 ) { set_remote_arch(RA_OSX); } } if (vuid != 0) { status = smb1srv_session_lookup(xconn, vuid, now, &session); if (NT_STATUS_EQUAL(status, NT_STATUS_USER_SESSION_DELETED)) { reply_force_doserror(req, ERRSRV, ERRbaduid); return; } if (NT_STATUS_EQUAL(status, NT_STATUS_NETWORK_SESSION_EXPIRED)) { status = NT_STATUS_OK; } if (NT_STATUS_IS_OK(status)) { session->status = NT_STATUS_MORE_PROCESSING_REQUIRED; status = NT_STATUS_MORE_PROCESSING_REQUIRED; TALLOC_FREE(session->pending_auth); } if (!NT_STATUS_EQUAL(status, NT_STATUS_MORE_PROCESSING_REQUIRED)) { reply_nterror(req, nt_status_squash(status)); return; } } if (session == NULL) { /* create a new session */ status = smbXsrv_session_create(xconn, now, &session); if (!NT_STATUS_IS_OK(status)) { reply_nterror(req, nt_status_squash(status)); return; } } status = smbXsrv_session_find_auth(session, xconn, now, &auth); if (!NT_STATUS_IS_OK(status)) { status = smbXsrv_session_create_auth(session, xconn, now, 0, /* flags */ 0, /* security */ &auth); if (!NT_STATUS_IS_OK(status)) { reply_nterror(req, nt_status_squash(status)); return; } } if (auth->gensec == NULL) { status = auth_generic_prepare(session, xconn->remote_address, xconn->local_address, "SMB", &auth->gensec); if (!NT_STATUS_IS_OK(status)) { TALLOC_FREE(session); reply_nterror(req, nt_status_squash(status)); return; } gensec_want_feature(auth->gensec, GENSEC_FEATURE_SESSION_KEY); gensec_want_feature(auth->gensec, GENSEC_FEATURE_UNIX_TOKEN); gensec_want_feature(auth->gensec, GENSEC_FEATURE_SMB_TRANSPORT); status = gensec_start_mech_by_oid(auth->gensec, GENSEC_OID_SPNEGO); if (!NT_STATUS_IS_OK(status)) { DEBUG(0, ("Failed to start SPNEGO handler!\n")); TALLOC_FREE(session);; reply_nterror(req, nt_status_squash(status)); return; } } become_root(); status = gensec_update(auth->gensec, talloc_tos(), in_blob, &out_blob); unbecome_root(); if (!NT_STATUS_IS_OK(status) && !NT_STATUS_EQUAL(status, NT_STATUS_MORE_PROCESSING_REQUIRED)) { TALLOC_FREE(session); reply_nterror(req, nt_status_squash(status)); return; } if (NT_STATUS_IS_OK(status) && session->global->auth_session_info == NULL) { struct auth_session_info *session_info = NULL; status = gensec_session_info(auth->gensec, session, &session_info); if (!NT_STATUS_IS_OK(status)) { DEBUG(1,("Failed to generate session_info " "(user and group token) for session setup: %s\n", nt_errstr(status))); data_blob_free(&out_blob); TALLOC_FREE(session); reply_nterror(req, nt_status_squash(status)); return; } if (security_session_user_level(session_info, NULL) == SECURITY_GUEST) { action |= SMB_SETUP_GUEST; } if (session_info->session_key.length > 0) { struct smbXsrv_session *x = session; /* * Note: the SMB1 signing key is not truncated to 16 byte! */ x->global->signing_key = data_blob_dup_talloc(x->global, session_info->session_key); if (x->global->signing_key.data == NULL) { data_blob_free(&out_blob); TALLOC_FREE(session); reply_nterror(req, NT_STATUS_NO_MEMORY); return; } /* * clear the session key * the first tcon will add setup the application key */ data_blob_clear_free(&session_info->session_key); } session->compat = talloc_zero(session, struct user_struct); if (session->compat == NULL) { data_blob_free(&out_blob); TALLOC_FREE(session); reply_nterror(req, NT_STATUS_NO_MEMORY); return; } session->compat->session = session; session->compat->homes_snum = -1; session->compat->session_info = session_info; session->compat->session_keystr = NULL; session->compat->vuid = session->global->session_wire_id; DLIST_ADD(sconn->users, session->compat); sconn->num_users++; if (security_session_user_level(session_info, NULL) >= SECURITY_USER) { is_authenticated = true; session->compat->homes_snum = register_homes_share(session_info->unix_info->unix_name); } if (srv_is_signing_negotiated(xconn) && is_authenticated && session->global->signing_key.length > 0) { /* * Try and turn on server signing on the first non-guest * sessionsetup. */ srv_set_signing(xconn, session->global->signing_key, data_blob_null); } set_current_user_info(session_info->unix_info->sanitized_username, session_info->unix_info->unix_name, session_info->info->domain_name); session->status = NT_STATUS_OK; session->global->auth_session_info = talloc_move(session->global, &session_info); session->global->auth_session_info_seqnum += 1; session->global->channels[0].auth_session_info_seqnum = session->global->auth_session_info_seqnum; session->global->auth_time = now; if (client_caps & CAP_DYNAMIC_REAUTH) { session->global->expiration_time = gensec_expire_time(auth->gensec); } else { session->global->expiration_time = GENSEC_EXPIRE_TIME_INFINITY; } if (!session_claim(session)) { DEBUG(1, ("smb1: Failed to claim session for vuid=%llu\n", (unsigned long long)session->compat->vuid)); data_blob_free(&out_blob); TALLOC_FREE(session); reply_nterror(req, NT_STATUS_LOGON_FAILURE); return; } status = smbXsrv_session_update(session); if (!NT_STATUS_IS_OK(status)) { DEBUG(0, ("smb1: Failed to update session for vuid=%llu - %s\n", (unsigned long long)session->compat->vuid, nt_errstr(status))); data_blob_free(&out_blob); TALLOC_FREE(session); reply_nterror(req, NT_STATUS_LOGON_FAILURE); return; } if (!xconn->smb1.sessions.done_sesssetup) { if (smb_bufsize < SMB_BUFFER_SIZE_MIN) { reply_force_doserror(req, ERRSRV, ERRerror); return; } xconn->smb1.sessions.max_send = smb_bufsize; xconn->smb1.sessions.done_sesssetup = true; } /* current_user_info is changed on new vuid */ reload_services(sconn, conn_snum_used, true); } else if (NT_STATUS_IS_OK(status)) {
static NTSTATUS smbd_smb2_auth_generic_return(struct smbXsrv_session *session, struct smbd_smb2_request *smb2req, uint8_t in_security_mode, struct auth_session_info *session_info, uint16_t *out_session_flags, uint64_t *out_session_id) { NTSTATUS status; bool guest = false; uint8_t session_key[16]; struct smbXsrv_session *x = session; struct smbXsrv_connection *xconn = smb2req->xconn; struct _derivation { DATA_BLOB label; DATA_BLOB context; }; struct { struct _derivation signing; struct _derivation encryption; struct _derivation decryption; struct _derivation application; } derivation = { }; if (xconn->protocol >= PROTOCOL_SMB3_10) { struct smbXsrv_preauth *preauth; struct _derivation *d; DATA_BLOB p; struct hc_sha512state sctx; size_t i; preauth = talloc_move(smb2req, &session->preauth); samba_SHA512_Init(&sctx); samba_SHA512_Update(&sctx, preauth->sha512_value, sizeof(preauth->sha512_value)); for (i = 1; i < smb2req->in.vector_count; i++) { samba_SHA512_Update(&sctx, smb2req->in.vector[i].iov_base, smb2req->in.vector[i].iov_len); } samba_SHA512_Final(preauth->sha512_value, &sctx); p = data_blob_const(preauth->sha512_value, sizeof(preauth->sha512_value)); d = &derivation.signing; d->label = data_blob_string_const_null("SMBSigningKey"); d->context = p; d = &derivation.decryption; d->label = data_blob_string_const_null("SMBC2SCipherKey"); d->context = p; d = &derivation.encryption; d->label = data_blob_string_const_null("SMBS2CCipherKey"); d->context = p; d = &derivation.application; d->label = data_blob_string_const_null("SMBAppKey"); d->context = p; } else if (xconn->protocol >= PROTOCOL_SMB2_24) { struct _derivation *d; d = &derivation.signing; d->label = data_blob_string_const_null("SMB2AESCMAC"); d->context = data_blob_string_const_null("SmbSign"); d = &derivation.decryption; d->label = data_blob_string_const_null("SMB2AESCCM"); d->context = data_blob_string_const_null("ServerIn "); d = &derivation.encryption; d->label = data_blob_string_const_null("SMB2AESCCM"); d->context = data_blob_string_const_null("ServerOut"); d = &derivation.application; d->label = data_blob_string_const_null("SMB2APP"); d->context = data_blob_string_const_null("SmbRpc"); } if ((in_security_mode & SMB2_NEGOTIATE_SIGNING_REQUIRED) || (xconn->smb2.server.security_mode & SMB2_NEGOTIATE_SIGNING_REQUIRED)) { x->global->signing_required = true; } if ((lp_smb_encrypt(-1) >= SMB_SIGNING_DESIRED) && (xconn->smb2.client.capabilities & SMB2_CAP_ENCRYPTION)) { x->encryption_desired = true; } if (lp_smb_encrypt(-1) == SMB_SIGNING_REQUIRED) { x->encryption_desired = true; x->global->encryption_required = true; } if (security_session_user_level(session_info, NULL) < SECURITY_USER) { /* 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 */ x->global->signing_required = false; guest = true; } if (guest && x->global->encryption_required) { DEBUG(1,("reject guest session as encryption is required\n")); return NT_STATUS_ACCESS_DENIED; } if (xconn->smb2.server.cipher == 0) { if (x->global->encryption_required) { DEBUG(1,("reject session with dialect[0x%04X] " "as encryption is required\n", xconn->smb2.server.dialect)); return NT_STATUS_ACCESS_DENIED; } } if (x->encryption_desired) { *out_session_flags |= SMB2_SESSION_FLAG_ENCRYPT_DATA; } ZERO_STRUCT(session_key); memcpy(session_key, session_info->session_key.data, MIN(session_info->session_key.length, sizeof(session_key))); x->global->signing_key = data_blob_talloc(x->global, session_key, sizeof(session_key)); if (x->global->signing_key.data == NULL) { ZERO_STRUCT(session_key); return NT_STATUS_NO_MEMORY; } if (xconn->protocol >= PROTOCOL_SMB2_24) { struct _derivation *d = &derivation.signing; smb2_key_derivation(session_key, sizeof(session_key), d->label.data, d->label.length, d->context.data, d->context.length, x->global->signing_key.data); } if (xconn->protocol >= PROTOCOL_SMB2_24) { struct _derivation *d = &derivation.decryption; x->global->decryption_key = data_blob_talloc(x->global, session_key, sizeof(session_key)); if (x->global->decryption_key.data == NULL) { ZERO_STRUCT(session_key); return NT_STATUS_NO_MEMORY; } smb2_key_derivation(session_key, sizeof(session_key), d->label.data, d->label.length, d->context.data, d->context.length, x->global->decryption_key.data); } if (xconn->protocol >= PROTOCOL_SMB2_24) { struct _derivation *d = &derivation.encryption; size_t nonce_size; x->global->encryption_key = data_blob_talloc(x->global, session_key, sizeof(session_key)); if (x->global->encryption_key.data == NULL) { ZERO_STRUCT(session_key); return NT_STATUS_NO_MEMORY; } smb2_key_derivation(session_key, sizeof(session_key), d->label.data, d->label.length, d->context.data, d->context.length, x->global->encryption_key.data); /* * CCM and GCM algorithms must never have their * nonce wrap, or the security of the whole * communication and the keys is destroyed. * We must drop the connection once we have * transfered too much data. * * NOTE: We assume nonces greater than 8 bytes. */ generate_random_buffer((uint8_t *)&x->nonce_high_random, sizeof(x->nonce_high_random)); switch (xconn->smb2.server.cipher) { case SMB2_ENCRYPTION_AES128_CCM: nonce_size = AES_CCM_128_NONCE_SIZE; break; case SMB2_ENCRYPTION_AES128_GCM: nonce_size = AES_GCM_128_IV_SIZE; break; default: nonce_size = 0; break; } x->nonce_high_max = SMB2_NONCE_HIGH_MAX(nonce_size); x->nonce_high = 0; x->nonce_low = 0; } x->global->application_key = data_blob_dup_talloc(x->global, x->global->signing_key); if (x->global->application_key.data == NULL) { ZERO_STRUCT(session_key); return NT_STATUS_NO_MEMORY; } if (xconn->protocol >= PROTOCOL_SMB2_24) { struct _derivation *d = &derivation.application; smb2_key_derivation(session_key, sizeof(session_key), d->label.data, d->label.length, d->context.data, d->context.length, x->global->application_key.data); } ZERO_STRUCT(session_key); x->global->channels[0].signing_key = data_blob_dup_talloc(x->global->channels, x->global->signing_key); if (x->global->channels[0].signing_key.data == NULL) { return NT_STATUS_NO_MEMORY; } data_blob_clear_free(&session_info->session_key); session_info->session_key = data_blob_dup_talloc(session_info, x->global->application_key); if (session_info->session_key.data == NULL) { return NT_STATUS_NO_MEMORY; } session->compat = talloc_zero(session, struct user_struct); if (session->compat == NULL) { return NT_STATUS_NO_MEMORY; } session->compat->session = session; session->compat->homes_snum = -1; session->compat->session_info = session_info; session->compat->session_keystr = NULL; session->compat->vuid = session->global->session_wire_id; DLIST_ADD(smb2req->sconn->users, session->compat); smb2req->sconn->num_users++; if (security_session_user_level(session_info, NULL) >= SECURITY_USER) { session->compat->homes_snum = register_homes_share(session_info->unix_info->unix_name); } set_current_user_info(session_info->unix_info->sanitized_username, session_info->unix_info->unix_name, session_info->info->domain_name); reload_services(smb2req->sconn, conn_snum_used, true); session->status = NT_STATUS_OK; session->global->auth_session_info = session_info; session->global->auth_session_info_seqnum += 1; session->global->channels[0].auth_session_info_seqnum = session->global->auth_session_info_seqnum; session->global->auth_time = timeval_to_nttime(&smb2req->request_time); session->global->expiration_time = gensec_expire_time(session->gensec); if (!session_claim(session)) { DEBUG(1, ("smb2: Failed to claim session " "for vuid=%llu\n", (unsigned long long)session->compat->vuid)); return NT_STATUS_LOGON_FAILURE; } status = smbXsrv_session_update(session); if (!NT_STATUS_IS_OK(status)) { DEBUG(0, ("smb2: Failed to update session for vuid=%llu - %s\n", (unsigned long long)session->compat->vuid, nt_errstr(status))); return NT_STATUS_LOGON_FAILURE; } /* * we attach the session to the request * so that the response can be signed */ if (!guest) { smb2req->do_signing = true; } global_client_caps |= (CAP_LEVEL_II_OPLOCKS|CAP_STATUS32); *out_session_id = session->global->session_wire_id; return NT_STATUS_OK; }
int register_existing_vuid(uint16 vuid, auth_serversupplied_info *server_info, DATA_BLOB response_blob, const char *smb_name) { fstring tmp; user_struct *vuser; vuser = get_partial_auth_user_struct(vuid); if (!vuser) { goto fail; } /* Use this to keep tabs on all our info from the authentication */ vuser->server_info = talloc_move(vuser, &server_info); /* This is a potentially untrusted username */ alpha_strcpy(tmp, smb_name, ". _-$", sizeof(tmp)); vuser->server_info->sanitized_username = talloc_strdup( vuser->server_info, tmp); DEBUG(10,("register_existing_vuid: (%u,%u) %s %s %s guest=%d\n", (unsigned int)vuser->server_info->utok.uid, (unsigned int)vuser->server_info->utok.gid, vuser->server_info->unix_name, vuser->server_info->sanitized_username, pdb_get_domain(vuser->server_info->sam_account), vuser->server_info->guest )); DEBUG(3, ("register_existing_vuid: User name: %s\t" "Real name: %s\n", vuser->server_info->unix_name, pdb_get_fullname(vuser->server_info->sam_account))); if (!vuser->server_info->ptok) { DEBUG(1, ("register_existing_vuid: server_info does not " "contain a user_token - cannot continue\n")); goto fail; } DEBUG(3,("register_existing_vuid: UNIX uid %d is UNIX user %s, " "and will be vuid %u\n", (int)vuser->server_info->utok.uid, vuser->server_info->unix_name, vuser->vuid)); if (!session_claim(vuser)) { DEBUG(1, ("register_existing_vuid: Failed to claim session " "for vuid=%d\n", vuser->vuid)); goto fail; } /* Register a home dir service for this user if (a) This is not a guest connection, (b) we have a home directory defined (c) there s not an existing static share by that name If a share exists by this name (autoloaded or not) reuse it . */ vuser->homes_snum = -1; if (!vuser->server_info->guest) { vuser->homes_snum = register_homes_share( vuser->server_info->unix_name); } if (srv_is_signing_negotiated() && !vuser->server_info->guest && !srv_signing_started()) { /* Try and turn on server signing on the first non-guest * sessionsetup. */ srv_set_signing(vuser->server_info->user_session_key, response_blob); } /* fill in the current_user_info struct */ set_current_user_info( vuser->server_info->sanitized_username, vuser->server_info->unix_name, pdb_get_domain(vuser->server_info->sam_account)); return vuser->vuid; fail: if (vuser) { invalidate_vuid(vuid); } return UID_FIELD_INVALID; }
static NTSTATUS smbd_smb2_auth_generic_return(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, uint64_t *out_session_id) { bool guest = false; if ((in_security_mode & SMB2_NEGOTIATE_SIGNING_REQUIRED) || lp_server_signing() == SMB_SIGNING_REQUIRED) { session->do_signing = true; } if (security_session_user_level(session->session_info, NULL) < SECURITY_USER) { /* 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; guest = true; } session->session_key = session->session_info->session_key; session->compat_vuser = talloc_zero(session, user_struct); if (session->compat_vuser == NULL) { TALLOC_FREE(session); return NT_STATUS_NO_MEMORY; } session->compat_vuser->gensec_security = session->gensec_security; 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); if (security_session_user_level(session->session_info, NULL) >= SECURITY_USER) { session->compat_vuser->homes_snum = register_homes_share(session->session_info->unix_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); return NT_STATUS_LOGON_FAILURE; } set_current_user_info(session->session_info->unix_info->sanitized_username, session->session_info->unix_info->unix_name, session->session_info->info->domain_name); reload_services(smb2req->sconn, conn_snum_used, true); session->status = NT_STATUS_OK; /* * we attach the session to the request * so that the response can be signed */ smb2req->session = session; if (!guest) { smb2req->do_signing = true; } global_client_caps |= (CAP_LEVEL_II_OPLOCKS|CAP_STATUS32); *out_session_id = session->vuid; return NT_STATUS_OK; }
static NTSTATUS smbd_smb2_session_setup_krb5(struct smbd_smb2_session *session, struct smbd_smb2_request *smb2req, 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) { 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; 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(), session->sconn->remote_hostname, 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_session_info_krb5(session, user, domain, real_username, pw, logon_info, map_domainuser_to_guest, username_was_mapped, &session_key, &session->session_info); if (!NT_STATUS_IS_OK(status)) { DEBUG(1, ("smb2: make_server_info_krb5 failed\n")); goto fail; } if ((in_security_mode & SMB2_NEGOTIATE_SIGNING_REQUIRED) || lp_server_signing() == Required) { session->do_signing = true; } if (security_session_user_level(session->session_info, NULL) < SECURITY_USER) { /* 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; } session->session_key = session->session_info->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); if (security_session_user_level(session->session_info, NULL) >= SECURITY_USER) { session->compat_vuser->homes_snum = register_homes_share(session->session_info->unix_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; }
static NTSTATUS smbd_smb2_common_ntlmssp_auth_return(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, uint64_t *out_session_id) { fstring tmp; bool guest = false; 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; guest = true; } session->session_key = session->session_info->user_session_key; session->compat_vuser = talloc_zero(session, user_struct); if (session->compat_vuser == NULL) { 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->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; /* * we attach the session to the request * so that the response can be signed */ smb2req->session = session; if (!guest) { smb2req->do_signing = true; } global_client_caps |= (CAP_LEVEL_II_OPLOCKS|CAP_STATUS32); *out_session_id = session->vuid; return NT_STATUS_OK; }
static NTSTATUS smbd_smb2_auth_generic_return(struct smbXsrv_session *session, struct smbd_smb2_request *smb2req, uint8_t in_security_mode, struct auth_session_info *session_info, uint16_t *out_session_flags, uint64_t *out_session_id) { NTSTATUS status; bool guest = false; uint8_t session_key[16]; struct smbXsrv_session *x = session; struct smbXsrv_connection *xconn = smb2req->xconn; if ((in_security_mode & SMB2_NEGOTIATE_SIGNING_REQUIRED) || lp_server_signing() == SMB_SIGNING_REQUIRED) { x->global->signing_required = true; } if (lp_smb_encrypt(-1) == SMB_SIGNING_REQUIRED) { x->global->encryption_required = true; } if (security_session_user_level(session_info, NULL) < SECURITY_USER) { /* 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 */ x->global->signing_required = false; guest = true; } if (guest && x->global->encryption_required) { DEBUG(1,("reject guest session as encryption is required\n")); return NT_STATUS_ACCESS_DENIED; } if (xconn->smb2.server.cipher == 0) { if (x->global->encryption_required) { DEBUG(1,("reject session with dialect[0x%04X] " "as encryption is required\n", xconn->smb2.server.dialect)); return NT_STATUS_ACCESS_DENIED; } } if (x->global->encryption_required) { *out_session_flags |= SMB2_SESSION_FLAG_ENCRYPT_DATA; } ZERO_STRUCT(session_key); memcpy(session_key, session_info->session_key.data, MIN(session_info->session_key.length, sizeof(session_key))); x->global->signing_key = data_blob_talloc(x->global, session_key, sizeof(session_key)); if (x->global->signing_key.data == NULL) { ZERO_STRUCT(session_key); return NT_STATUS_NO_MEMORY; } if (xconn->protocol >= PROTOCOL_SMB2_24) { const DATA_BLOB label = data_blob_string_const_null("SMB2AESCMAC"); const DATA_BLOB context = data_blob_string_const_null("SmbSign"); smb2_key_derivation(session_key, sizeof(session_key), label.data, label.length, context.data, context.length, x->global->signing_key.data); } if (xconn->protocol >= PROTOCOL_SMB2_24) { const DATA_BLOB label = data_blob_string_const_null("SMB2AESCCM"); const DATA_BLOB context = data_blob_string_const_null("ServerIn "); x->global->decryption_key = data_blob_talloc(x->global, session_key, sizeof(session_key)); if (x->global->decryption_key.data == NULL) { ZERO_STRUCT(session_key); return NT_STATUS_NO_MEMORY; } smb2_key_derivation(session_key, sizeof(session_key), label.data, label.length, context.data, context.length, x->global->decryption_key.data); } if (xconn->protocol >= PROTOCOL_SMB2_24) { const DATA_BLOB label = data_blob_string_const_null("SMB2AESCCM"); const DATA_BLOB context = data_blob_string_const_null("ServerOut"); x->global->encryption_key = data_blob_talloc(x->global, session_key, sizeof(session_key)); if (x->global->encryption_key.data == NULL) { ZERO_STRUCT(session_key); return NT_STATUS_NO_MEMORY; } smb2_key_derivation(session_key, sizeof(session_key), label.data, label.length, context.data, context.length, x->global->encryption_key.data); generate_random_buffer((uint8_t *)&x->nonce_high, sizeof(x->nonce_high)); x->nonce_low = 1; } x->global->application_key = data_blob_dup_talloc(x->global, x->global->signing_key); if (x->global->application_key.data == NULL) { ZERO_STRUCT(session_key); return NT_STATUS_NO_MEMORY; } if (xconn->protocol >= PROTOCOL_SMB2_24) { const DATA_BLOB label = data_blob_string_const_null("SMB2APP"); const DATA_BLOB context = data_blob_string_const_null("SmbRpc"); smb2_key_derivation(session_key, sizeof(session_key), label.data, label.length, context.data, context.length, x->global->application_key.data); } ZERO_STRUCT(session_key); x->global->channels[0].signing_key = data_blob_dup_talloc(x->global->channels, x->global->signing_key); if (x->global->channels[0].signing_key.data == NULL) { return NT_STATUS_NO_MEMORY; } data_blob_clear_free(&session_info->session_key); session_info->session_key = data_blob_dup_talloc(session_info, x->global->application_key); if (session_info->session_key.data == NULL) { return NT_STATUS_NO_MEMORY; } session->compat = talloc_zero(session, struct user_struct); if (session->compat == NULL) { return NT_STATUS_NO_MEMORY; } session->compat->session = session; session->compat->homes_snum = -1; session->compat->session_info = session_info; session->compat->session_keystr = NULL; session->compat->vuid = session->global->session_wire_id; DLIST_ADD(smb2req->sconn->users, session->compat); smb2req->sconn->num_users++; if (security_session_user_level(session_info, NULL) >= SECURITY_USER) { session->compat->homes_snum = register_homes_share(session_info->unix_info->unix_name); } set_current_user_info(session_info->unix_info->sanitized_username, session_info->unix_info->unix_name, session_info->info->domain_name); reload_services(smb2req->sconn, conn_snum_used, true); session->status = NT_STATUS_OK; session->global->auth_session_info = session_info; session->global->auth_session_info_seqnum += 1; session->global->channels[0].auth_session_info_seqnum = session->global->auth_session_info_seqnum; session->global->auth_time = timeval_to_nttime(&smb2req->request_time); session->global->expiration_time = gensec_expire_time(session->gensec); if (!session_claim(session)) { DEBUG(1, ("smb2: Failed to claim session " "for vuid=%llu\n", (unsigned long long)session->compat->vuid)); return NT_STATUS_LOGON_FAILURE; } status = smbXsrv_session_update(session); if (!NT_STATUS_IS_OK(status)) { DEBUG(0, ("smb2: Failed to update session for vuid=%llu - %s\n", (unsigned long long)session->compat->vuid, nt_errstr(status))); return NT_STATUS_LOGON_FAILURE; } /* * we attach the session to the request * so that the response can be signed */ smb2req->session = session; if (!guest) { smb2req->do_signing = true; } global_client_caps |= (CAP_LEVEL_II_OPLOCKS|CAP_STATUS32); *out_session_id = session->global->session_wire_id; return NT_STATUS_OK; }