From 996850e7c3bae8fa2f3fcb3f2e3a811c1e6c162f Mon Sep 17 00:00:00 2001 From: Andreas Schneider Date: Fri, 29 Mar 2019 11:34:53 +0100 Subject: [PATCH 01/11] s3:libads: Print more information when LDAP fails Currently we just get an error but don't know what exactly we tried to do in 'net ads join -d10'. BUG: https://bugzilla.samba.org/show_bug.cgi?id=13861 Signed-off-by: Andreas Schneider Reviewed-by: Ralph Boehme Reviewed-by: Andrew Bartlett (cherry picked from commit 40669e3739eb5cde135c371e2c8134d3f11a16a5) --- source3/libads/ldap.c | 12 ++++++++++-- 1 file changed, 10 insertions(+), 2 deletions(-) diff --git a/source3/libads/ldap.c b/source3/libads/ldap.c index 13846695bd4..110f74a2dbb 100644 --- a/source3/libads/ldap.c +++ b/source3/libads/ldap.c @@ -1521,8 +1521,10 @@ static void ads_print_error(int ret, LDAP *ld) if (ret != 0) { char *ld_error = NULL; ldap_get_option(ld, LDAP_OPT_ERROR_STRING, &ld_error); - DEBUG(10,("AD LDAP failure %d (%s):\n%s\n", ret, - ldap_err2string(ret), ld_error)); + DBG_ERR("AD LDAP ERROR: %d (%s): %s\n", + ret, + ldap_err2string(ret), + ld_error); SAFE_FREE(ld_error); } } @@ -1549,6 +1551,8 @@ ADS_STATUS ads_gen_mod(ADS_STRUCT *ads, const char *mod_dn, ADS_MODLIST mods) (char) 1}; LDAPControl *controls[2]; + DBG_INFO("AD LDAP: Modifying %s\n", mod_dn); + controls[0] = &PermitModify; controls[1] = NULL; @@ -1580,6 +1584,8 @@ ADS_STATUS ads_gen_add(ADS_STRUCT *ads, const char *new_dn, ADS_MODLIST mods) char *utf8_dn = NULL; size_t converted_size; + DBG_INFO("AD LDAP: Adding %s\n", new_dn); + if (!push_utf8_talloc(talloc_tos(), &utf8_dn, new_dn, &converted_size)) { DEBUG(1, ("ads_gen_add: push_utf8_talloc failed!")); return ADS_ERROR_NT(NT_STATUS_NO_MEMORY); @@ -1612,6 +1618,8 @@ ADS_STATUS ads_del_dn(ADS_STRUCT *ads, char *del_dn) return ADS_ERROR_NT(NT_STATUS_NO_MEMORY); } + DBG_INFO("AD LDAP: Deleting %s\n", del_dn); + ret = ldap_delete_s(ads->ldap.ld, utf8_dn); ads_print_error(ret, ads->ldap.ld); TALLOC_FREE(utf8_dn); -- 2.21.0 From 5fe5419bd6617fb33c7aafce20e1eeb3edd2f35f Mon Sep 17 00:00:00 2001 From: Andreas Schneider Date: Wed, 27 Mar 2019 16:45:39 +0100 Subject: [PATCH 02/11] s3:libsmb: Add some useful debug output to cliconnect BUG: https://bugzilla.samba.org/show_bug.cgi?id=13861 Signed-off-by: Andreas Schneider Reviewed-by: Ralph Boehme Reviewed-by: Andrew Bartlett (cherry picked from commit 011a47f04dabe22095a30d284662d8ca50463ee8) --- source3/libsmb/cliconnect.c | 13 +++++++++++++ 1 file changed, 13 insertions(+) diff --git a/source3/libsmb/cliconnect.c b/source3/libsmb/cliconnect.c index 837299d9220..9a3d3c769f9 100644 --- a/source3/libsmb/cliconnect.c +++ b/source3/libsmb/cliconnect.c @@ -345,6 +345,8 @@ NTSTATUS cli_session_creds_prepare_krb5(struct cli_state *cli, return NT_STATUS_OK; } + DBG_INFO("Doing kinit for %s to access %s\n", + user_principal, target_hostname); /* * TODO: This should be done within the gensec layer @@ -374,6 +376,11 @@ NTSTATUS cli_session_creds_prepare_krb5(struct cli_state *cli, */ } + DBG_DEBUG("Successfully authenticated as %s to access %s using " + "Kerberos\n", + user_principal, + target_hostname); + TALLOC_FREE(frame); return NT_STATUS_OK; } @@ -1293,6 +1300,10 @@ static struct tevent_req *cli_session_setup_spnego_send( return tevent_req_post(req, ev); } + DBG_INFO("Connect to %s as %s using SPNEGO\n", + target_hostname, + cli_credentials_get_principal(creds, talloc_tos())); + subreq = cli_session_setup_gensec_send(state, ev, cli, creds, target_service, target_hostname); if (tevent_req_nomem(subreq, req)) { @@ -1496,6 +1507,8 @@ struct tevent_req *cli_session_setup_creds_send(TALLOC_CTX *mem_ctx, return tevent_req_post(req, ev); } + DBG_INFO("Connect to %s as %s using NTLM\n", domain, username); + if ((sec_mode & NEGOTIATE_SECURITY_CHALLENGE_RESPONSE) == 0) { bool use_unicode = smbXcli_conn_use_unicode(cli->conn); uint8_t *bytes = NULL; -- 2.21.0 From 0ad85d0c8d5f1c0a8a2fc9bed2e685e3421195bc Mon Sep 17 00:00:00 2001 From: Guenther Deschner Date: Mon, 1 Apr 2019 17:46:39 +0200 Subject: [PATCH 03/11] s3:libnet: Fix debug message in libnet_DomainJoin() A newline is missing but also use DBG_INFO macro and cleanup spelling. Signed-off-by: Guenther Deschner Reviewed-by: Ralph Boehme Reviewed-by: Andrew Bartlett (cherry picked from commit 3a33c360071bb7cada58f1f71ccd8949fda70662) --- source3/libnet/libnet_join.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/source3/libnet/libnet_join.c b/source3/libnet/libnet_join.c index 27fc5135442..ddc00f7ad7c 100644 --- a/source3/libnet/libnet_join.c +++ b/source3/libnet/libnet_join.c @@ -2664,8 +2664,8 @@ static WERROR libnet_DomainJoin(TALLOC_CTX *mem_ctx, return WERR_NERR_DEFAULTJOINREQUIRED; } - DEBUG(5, ("failed to precreate account in ou %s: %s", - r->in.account_ou, ads_errstr(ads_status))); + DBG_INFO("Failed to pre-create account in OU %s: %s\n", + r->in.account_ou, ads_errstr(ads_status)); } rpc_join: -- 2.21.0 From d6802828cc9a0dbdd667966faea7cc331479179b Mon Sep 17 00:00:00 2001 From: Guenther Deschner Date: Wed, 27 Mar 2019 17:51:04 +0100 Subject: [PATCH 04/11] auth:ntlmssp: Add back CRAP ndr debug output This got lost somehow during refactoring. This is still viable information when trying to figure out what is going wrong when authenticating a user over NTLMSSP. BUG: https://bugzilla.samba.org/show_bug.cgi?id=13861 Signed-off-by: Guenther Deschner Reviewed-by: Ralph Boehme Reviewed-by: Andrew Bartlett (cherry picked from commit 9e92654899db3c951bee0203415a15737402e7b7) --- auth/ntlmssp/ntlmssp_client.c | 32 ++++++++++++++++++++++++++++++++ 1 file changed, 32 insertions(+) diff --git a/auth/ntlmssp/ntlmssp_client.c b/auth/ntlmssp/ntlmssp_client.c index ab406a2c5be..8e49dcee5ea 100644 --- a/auth/ntlmssp/ntlmssp_client.c +++ b/auth/ntlmssp/ntlmssp_client.c @@ -342,6 +342,22 @@ NTSTATUS ntlmssp_client_challenge(struct gensec_security *gensec_security, } } + if (DEBUGLEVEL >= 10) { + struct CHALLENGE_MESSAGE *challenge = + talloc(ntlmssp_state, struct CHALLENGE_MESSAGE); + if (challenge != NULL) { + NTSTATUS status; + challenge->NegotiateFlags = chal_flags; + status = ntlmssp_pull_CHALLENGE_MESSAGE( + &in, challenge, challenge); + if (NT_STATUS_IS_OK(status)) { + NDR_PRINT_DEBUG(CHALLENGE_MESSAGE, + challenge); + } + TALLOC_FREE(challenge); + } + } + if (chal_flags & NTLMSSP_TARGET_TYPE_SERVER) { ntlmssp_state->server.is_standalone = true; } else { @@ -702,6 +718,22 @@ NTSTATUS ntlmssp_client_challenge(struct gensec_security *gensec_security, return nt_status; } + if (DEBUGLEVEL >= 10) { + struct AUTHENTICATE_MESSAGE *authenticate = + talloc(ntlmssp_state, struct AUTHENTICATE_MESSAGE); + if (authenticate != NULL) { + NTSTATUS status; + authenticate->NegotiateFlags = ntlmssp_state->neg_flags; + status = ntlmssp_pull_AUTHENTICATE_MESSAGE( + out, authenticate, authenticate); + if (NT_STATUS_IS_OK(status)) { + NDR_PRINT_DEBUG(AUTHENTICATE_MESSAGE, + authenticate); + } + TALLOC_FREE(authenticate); + } + } + /* * We always include the MIC, even without: * av_flags->Value.AvFlags |= NTLMSSP_AVFLAG_MIC_IN_AUTHENTICATE_MESSAGE; -- 2.21.0 From 9a4a76ad58a96903129d1aef0c5ac05a9beeda4b Mon Sep 17 00:00:00 2001 From: Andreas Schneider Date: Mon, 1 Apr 2019 15:59:10 +0200 Subject: [PATCH 05/11] auth:creds: Prefer the principal over DOMAIN/username when using NTLM If we want to authenticate using -Wadmin@otherdomain the DC should do take care of the authentication with the right DC for us. BUG: https://bugzilla.samba.org/show_bug.cgi?id=13861 Pair-Programmed-With: Guenther Deschner Signed-off-by: Guenther Deschner Signed-off-by: Andreas Schneider Reviewed-by: Ralph Boehme Reviewed-by: Andrew Bartlett (cherry picked from commit 5c7f0a6902cfdd698e5f4159d37537bb4c9c1cc3) --- auth/credentials/credentials.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/auth/credentials/credentials.c b/auth/credentials/credentials.c index 4663185c979..7ef58d0752c 100644 --- a/auth/credentials/credentials.c +++ b/auth/credentials/credentials.c @@ -1115,7 +1115,7 @@ _PUBLIC_ void cli_credentials_get_ntlm_username_domain(struct cli_credentials *c const char **username, const char **domain) { - if (cred->principal_obtained > cred->username_obtained) { + if (cred->principal_obtained >= cred->username_obtained) { *domain = talloc_strdup(mem_ctx, ""); *username = cli_credentials_get_principal(cred, mem_ctx); } else { -- 2.21.0 From 40267b96b2d596bf92139bbc794337fa828e63d5 Mon Sep 17 00:00:00 2001 From: Andreas Schneider Date: Mon, 1 Apr 2019 16:39:45 +0200 Subject: [PATCH 06/11] s3:libnet: Use more secure name for the JOIN krb5.conf Currently we create krb5.conf..JOIN, use krb5.conf._JOIN_ instead. BUG: https://bugzilla.samba.org/show_bug.cgi?id=13861 Signed-off-by: Andreas Schneider Reviewed-by: Ralph Boehme Reviewed-by: Andrew Bartlett (cherry picked from commit b7f0c64514a28cfb5d2cdee683c18943b97ea753) --- source3/libnet/libnet_join.c | 8 +++++--- 1 file changed, 5 insertions(+), 3 deletions(-) diff --git a/source3/libnet/libnet_join.c b/source3/libnet/libnet_join.c index ddc00f7ad7c..e052306523d 100644 --- a/source3/libnet/libnet_join.c +++ b/source3/libnet/libnet_join.c @@ -2598,12 +2598,14 @@ static WERROR libnet_DomainJoin(TALLOC_CTX *mem_ctx, } /* The domain parameter is only used as modifier - * to krb5.conf file name. .JOIN is is not a valid + * to krb5.conf file name. _JOIN_ is is not a valid * NetBIOS name so it cannot clash with another domain * -- Uri. */ - create_local_private_krb5_conf_for_domain( - pre_connect_realm, ".JOIN", sitename, &ss); + create_local_private_krb5_conf_for_domain(pre_connect_realm, + "_JOIN_", + sitename, + &ss); } status = libnet_join_lookup_dc_rpc(mem_ctx, r, &cli); -- 2.21.0 From cdc7199588e89eec42f30d0ea00f406911739763 Mon Sep 17 00:00:00 2001 From: Andreas Schneider Date: Mon, 1 Apr 2019 16:47:26 +0200 Subject: [PATCH 07/11] s3:libads: Make sure we can lookup KDCs which are not configured BUG: https://bugzilla.samba.org/show_bug.cgi?id=13861 Pair-Programmed-With: Guenther Deschner Signed-off-by: Guenther Deschner Signed-off-by: Andreas Schneider Reviewed-by: Ralph Boehme Reviewed-by: Andrew Bartlett (cherry picked from commit c016afc832543514ebf7ecda1fbe6b272ea533d6) --- source3/libads/kerberos.c | 12 ++++++++++-- 1 file changed, 10 insertions(+), 2 deletions(-) diff --git a/source3/libads/kerberos.c b/source3/libads/kerberos.c index e623f2456a8..360cdd741da 100644 --- a/source3/libads/kerberos.c +++ b/source3/libads/kerberos.c @@ -673,11 +673,19 @@ bool create_local_private_krb5_conf_for_domain(const char *realm, } #endif + /* + * We are setting 'dns_lookup_kdc' to true, because we want to lookup + * KDCs which are not configured via DNS SRV records, eg. if we do: + * + * net ads join -Uadmin@otherdomain + */ file_contents = talloc_asprintf(fname, - "[libdefaults]\n\tdefault_realm = %s\n" + "[libdefaults]\n" + "\tdefault_realm = %s\n" "%s" - "\tdns_lookup_realm = false\n\n" + "\tdns_lookup_realm = false\n" + "\tdns_lookup_kdc = true\n\n" "[realms]\n\t%s = {\n" "%s\t}\n" "%s\n", -- 2.21.0 From 85d85aa3f79ab0a4c3f3f3aad94d7ed545992a45 Mon Sep 17 00:00:00 2001 From: Guenther Deschner Date: Mon, 1 Apr 2019 17:40:03 +0200 Subject: [PATCH 08/11] s3:ldap: Leave add machine code early for pre-existing accounts This avoids numerous LDAP constraint violation errors when we try to re-precreate an already existing machine account. BUG: https://bugzilla.samba.org/show_bug.cgi?id=13861 Pair-Programmed-With: Andreas Schneider Signed-off-by: Guenther Deschner Signed-off-by: Andreas Schneider Reviewed-by: Ralph Boehme Reviewed-by: Andrew Bartlett (cherry picked from commit 2044ca0e20bd3180720a82506b3af041d14b5c68) --- source3/libads/ldap.c | 10 +++++++++- 1 file changed, 9 insertions(+), 1 deletion(-) diff --git a/source3/libads/ldap.c b/source3/libads/ldap.c index 110f74a2dbb..e191ea792a8 100644 --- a/source3/libads/ldap.c +++ b/source3/libads/ldap.c @@ -2120,6 +2120,15 @@ ADS_STATUS ads_create_machine_acct(ADS_STRUCT *ads, goto done; } + ret = ads_find_machine_acct(ads, &res, machine_escaped); + ads_msgfree(ads, res); + if (ADS_ERR_OK(ret)) { + DBG_DEBUG("Host account for %s already exists.\n", + machine_escaped); + ret = ADS_ERROR_LDAP(LDAP_ALREADY_EXISTS); + goto done; + } + new_dn = talloc_asprintf(ctx, "cn=%s,%s", machine_escaped, org_unit); samAccountName = talloc_asprintf(ctx, "%s$", machine_name); @@ -2155,7 +2164,6 @@ ADS_STATUS ads_create_machine_acct(ADS_STRUCT *ads, done: SAFE_FREE(machine_escaped); - ads_msgfree(ads, res); talloc_destroy(ctx); return ret; -- 2.21.0 From ff8c3e197107621f9398515120a33239940a507b Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?G=C3=BCnther=20Deschner?= Date: Tue, 2 Apr 2019 13:14:06 +0200 Subject: [PATCH 09/11] s3-libnet_join: always pass down admin domain to ads layer Otherwise we could loose the information that a non-default domain name has been used for admin creds. BUG: https://bugzilla.samba.org/show_bug.cgi?id=13861 Guenther Signed-off-by: Guenther Deschner Reviewed-by: Andreas Schneider (cherry picked from commit ea29aa27cbac4253ee1701fed99a3e0811f7475d) --- source3/libnet/libnet_join.c | 12 ++++++++++++ 1 file changed, 12 insertions(+) diff --git a/source3/libnet/libnet_join.c b/source3/libnet/libnet_join.c index e052306523d..fc7429e6a23 100644 --- a/source3/libnet/libnet_join.c +++ b/source3/libnet/libnet_join.c @@ -205,7 +205,19 @@ static ADS_STATUS libnet_join_connect_ads(TALLOC_CTX *mem_ctx, password = r->in.machine_password; ccname = "MEMORY:libnet_join_machine_creds"; } else { + char *p = NULL; + username = r->in.admin_account; + + p = strchr(r->in.admin_account, '@'); + if (p == NULL) { + username = talloc_asprintf(mem_ctx, "%s@%s", + r->in.admin_account, + r->in.admin_domain); + } + if (username == NULL) { + return ADS_ERROR(LDAP_NO_MEMORY); + } password = r->in.admin_password; /* -- 2.21.0 From a3939fb583bb21abb34ec4179ffeb65e9a621279 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?G=C3=BCnther=20Deschner?= Date: Tue, 2 Apr 2019 13:16:11 +0200 Subject: [PATCH 10/11] s3-libnet_join: setup libnet join error string when AD connect fails BUG: https://bugzilla.samba.org/show_bug.cgi?id=13861 Guenther Signed-off-by: Guenther Deschner Reviewed-by: Andreas Schneider (cherry picked from commit 68121f46c74df9cef7a377040d01ba75cdcf5a26) --- source3/libnet/libnet_join.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/source3/libnet/libnet_join.c b/source3/libnet/libnet_join.c index fc7429e6a23..6d3fc1fe01f 100644 --- a/source3/libnet/libnet_join.c +++ b/source3/libnet/libnet_join.c @@ -2655,6 +2655,9 @@ static WERROR libnet_DomainJoin(TALLOC_CTX *mem_ctx, ads_status = libnet_join_connect_ads_user(mem_ctx, r); if (!ADS_ERR_OK(ads_status)) { + libnet_join_set_error_string(mem_ctx, r, + "failed to connect to AD: %s", + ads_errstr(ads_status)); return WERR_NERR_DEFAULTJOINREQUIRED; } -- 2.21.0 From d91788b9f257a3e87d9ad460bc4a3e8b8f1d49c3 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?G=C3=BCnther=20Deschner?= Date: Tue, 2 Apr 2019 13:16:55 +0200 Subject: [PATCH 11/11] s3-libnet_join: allow fallback to NTLMSSP auth in libnet_join When a non-DNS and non-default admin domain is provided during the join sometimes we might not be able to kinit with 'user@SHORTDOMAINNAME' (e.g. when the winbind krb5 locator is not installed). In that case lets fallback to NTLMSSP, like we do in winbind. BUG: https://bugzilla.samba.org/show_bug.cgi?id=13861 Guenther Signed-off-by: Guenther Deschner Reviewed-by: Andreas Schneider Autobuild-User(master): Andreas Schneider Autobuild-Date(master): Wed Apr 3 18:57:31 UTC 2019 on sn-devel-144 (cherry picked from commit 377d27359ccdb8f2680fda36ca388f44456590e5) --- source3/libnet/libnet_join.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/source3/libnet/libnet_join.c b/source3/libnet/libnet_join.c index 6d3fc1fe01f..b876d7ea89f 100644 --- a/source3/libnet/libnet_join.c +++ b/source3/libnet/libnet_join.c @@ -145,6 +145,8 @@ static ADS_STATUS libnet_connect_ads(const char *dns_domain_name, return ADS_ERROR_LDAP(LDAP_NO_MEMORY); } + my_ads->auth.flags |= ADS_AUTH_ALLOW_NTLMSSP; + if (user_name) { SAFE_FREE(my_ads->auth.user_name); my_ads->auth.user_name = SMB_STRDUP(user_name); -- 2.21.0