diff options
Diffstat (limited to 'source3')
| -rw-r--r-- | source3/smbd/smb2_sesssetup.c | 467 |
1 files changed, 7 insertions, 460 deletions
diff --git a/source3/smbd/smb2_sesssetup.c b/source3/smbd/smb2_sesssetup.c index 3163ac0794..3f6a2d7d51 100644 --- a/source3/smbd/smb2_sesssetup.c +++ b/source3/smbd/smb2_sesssetup.c @@ -23,12 +23,7 @@ #include "smbd/smbd.h" #include "smbd/globals.h" #include "../libcli/smb/smb_common.h" -#include "../libcli/auth/spnego.h" #include "../auth/gensec/gensec.h" -#include "../auth/ntlmssp/ntlmssp.h" -#include "../librpc/gen_ndr/krb5pac.h" -#include "libads/kerberos_proto.h" -#include "../lib/util/asn1.h" #include "auth.h" #include "../lib/tsocket/tsocket.h" #include "../libcli/security/security.h" @@ -143,292 +138,6 @@ static int smbd_smb2_session_destructor(struct smbd_smb2_session *session) return 0; } -#ifdef HAVE_KRB5 -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; - bool 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, conn_snum_used, 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() == 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) { - status = NT_STATUS_NO_MEMORY; - goto fail; - } - session->compat_vuser->gensec_security = 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; - } - - 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); - 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, - uint64_t *out_session_id) -{ - DATA_BLOB secblob_in = data_blob_null; - DATA_BLOB chal_out = data_blob_null; - char *kerb_mech = NULL; - NTSTATUS status; - - /* Ensure we have no old NTLM state around. */ - TALLOC_FREE(session->gensec_security); - - status = parse_spnego_mechanisms(talloc_tos(), in_security_buffer, - &secblob_in, &kerb_mech); - if (!NT_STATUS_IS_OK(status)) { - goto out; - } - -#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); - - goto out; - } -#endif - - if (kerb_mech) { - /* The mechtoken is a krb5 ticket, but - * we need to fall back to NTLM. */ - - 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_generic_prepare(session, session->sconn->remote_address, - &session->gensec_security); - if (!NT_STATUS_IS_OK(status)) { - goto out; - } - - gensec_want_feature(session->gensec_security, GENSEC_FEATURE_SESSION_KEY); - gensec_want_feature(session->gensec_security, GENSEC_FEATURE_UNIX_TOKEN); - - status = gensec_start_mech_by_oid(session->gensec_security, GENSEC_OID_NTLMSSP); - if (!NT_STATUS_IS_OK(status)) { - goto out; - } - - status = gensec_update(session->gensec_security, - talloc_tos(), NULL, - secblob_in, - &chal_out); - } - - if (!NT_STATUS_IS_OK(status) && - !NT_STATUS_EQUAL(status, - NT_STATUS_MORE_PROCESSING_REQUIRED)) { - goto out; - } - - *out_security_buffer = spnego_gen_auth_response(smb2req, - &chal_out, - status, - OID_NTLMSSP); - if (out_security_buffer->data == NULL) { - status = NT_STATUS_NO_MEMORY; - goto out; - } - *out_session_id = session->vuid; - - out: - - data_blob_free(&secblob_in); - data_blob_free(&chal_out); - TALLOC_FREE(kerb_mech); - if (!NT_STATUS_IS_OK(status) && - !NT_STATUS_EQUAL(status, - NT_STATUS_MORE_PROCESSING_REQUIRED)) { - TALLOC_FREE(session); - } - 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, @@ -503,138 +212,6 @@ static NTSTATUS smbd_smb2_common_ntlmssp_auth_return(struct smbd_smb2_session *s return NT_STATUS_OK; } -static NTSTATUS smbd_smb2_spnego_auth(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, - uint64_t *out_session_id) -{ - DATA_BLOB auth = data_blob_null; - DATA_BLOB auth_out = data_blob_null; - NTSTATUS status; - - 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->gensec_security == NULL) { - status = auth_generic_prepare(session, session->sconn->remote_address, - &session->gensec_security); - if (!NT_STATUS_IS_OK(status)) { - data_blob_free(&auth); - TALLOC_FREE(session); - return status; - } - - gensec_want_feature(session->gensec_security, GENSEC_FEATURE_SESSION_KEY); - gensec_want_feature(session->gensec_security, GENSEC_FEATURE_UNIX_TOKEN); - - status = gensec_start_mech_by_oid(session->gensec_security, GENSEC_OID_NTLMSSP); - if (!NT_STATUS_IS_OK(status)) { - data_blob_free(&auth); - TALLOC_FREE(session); - return status; - } - } - - status = gensec_update(session->gensec_security, - talloc_tos(), NULL, - auth, - &auth_out); - /* If status is NT_STATUS_OK then we need to get the token. - * Map to guest is now internal to auth_ntlmssp */ - if (NT_STATUS_IS_OK(status)) { - status = gensec_session_info(session->gensec_security, - session, - &session->session_info); - } - - if (!NT_STATUS_IS_OK(status) && - !NT_STATUS_EQUAL(status, NT_STATUS_MORE_PROCESSING_REQUIRED)) { - data_blob_free(&auth); - TALLOC_FREE(session); - return status; - } - - data_blob_free(&auth); - - *out_security_buffer = spnego_gen_auth_response(smb2req, - &auth_out, status, NULL); - - if (out_security_buffer->data == NULL) { - 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_id); -} - static NTSTATUS smbd_smb2_raw_ntlmssp_auth(struct smbd_smb2_session *session, struct smbd_smb2_request *smb2req, uint8_t in_security_mode, @@ -754,43 +331,13 @@ static NTSTATUS smbd_smb2_session_setup(struct smbd_smb2_request *smb2req, return NT_STATUS_REQUEST_NOT_ACCEPTED; } - /* Handle either raw NTLMSSP or hand off the whole blob to - * GENSEC. The processing at this layer is essentially - * identical regardless. In particular, both rely only on the - * status code (not the contents of the packet) and do not - * wrap the result */ - if (session->sconn->use_gensec_hook - || ntlmssp_blob_matches_magic(&in_security_buffer)) { - return smbd_smb2_raw_ntlmssp_auth(session, - smb2req, - in_security_mode, - in_security_buffer, - out_session_flags, - out_security_buffer, - out_session_id); - } else 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, - out_session_id); - } else if (in_security_buffer.data[0] == ASN1_CONTEXT(1)) { - return smbd_smb2_spnego_auth(session, - smb2req, - in_security_mode, - in_security_buffer, - out_session_flags, - out_security_buffer, - out_session_id); - } - - /* Unknown packet type. */ - DEBUG(1,("Unknown packet type %u in smb2 sessionsetup\n", - (unsigned int)in_security_buffer.data[0] )); - TALLOC_FREE(session); - return NT_STATUS_LOGON_FAILURE; + return smbd_smb2_raw_ntlmssp_auth(session, + smb2req, + in_security_mode, + in_security_buffer, + out_session_flags, + out_security_buffer, + out_session_id); } NTSTATUS smbd_smb2_request_process_logoff(struct smbd_smb2_request *req) |