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adcli.14918
0015-update-allow-to-add-service-names.patch
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File 0015-update-allow-to-add-service-names.patch of Package adcli.14918
From 8629dd3a8be410d7d13e034af5f07adb26d52da4 Mon Sep 17 00:00:00 2001 From: Sumit Bose <sbose@redhat.com> Date: Mon, 4 Jun 2018 10:49:33 +0200 Subject: [PATCH 15/25] update: allow to add service names Related to https://bugzilla.redhat.com/show_bug.cgi?id=1547013 https://bugzilla.redhat.com/show_bug.cgi?id=1545568 --- library/adenroll.c | 136 +++++++++++++++++++++++++++++++++------------------- library/adkrb5.c | 113 +++++++++++++++++++++++++++++++++++++++++++ library/adprivate.h | 6 +++ 3 files changed, 206 insertions(+), 49 deletions(-) diff --git a/library/adenroll.c b/library/adenroll.c index 1cc8ffc..6b6630f 100644 --- a/library/adenroll.c +++ b/library/adenroll.c @@ -300,13 +300,37 @@ ensure_service_names (adcli_result res, } static adcli_result -ensure_service_principals (adcli_result res, - adcli_enroll *enroll) +add_service_names_to_service_principals (adcli_enroll *enroll) { char *name; int length = 0; int i; + if (enroll->service_principals != NULL) { + length = seq_count (enroll->service_principals); + } + + for (i = 0; enroll->service_names[i] != NULL; i++) { + if (asprintf (&name, "%s/%s", enroll->service_names[i], enroll->computer_name) < 0) + return_unexpected_if_reached (); + enroll->service_principals = _adcli_strv_add (enroll->service_principals, + name, &length); + + if (enroll->host_fqdn) { + if (asprintf (&name, "%s/%s", enroll->service_names[i], enroll->host_fqdn) < 0) + return_unexpected_if_reached (); + enroll->service_principals = _adcli_strv_add (enroll->service_principals, + name, &length); + } + } + + return ADCLI_SUCCESS; +} + +static adcli_result +ensure_service_principals (adcli_result res, + adcli_enroll *enroll) +{ if (res != ADCLI_SUCCESS) return res; @@ -314,20 +338,7 @@ ensure_service_principals (adcli_result res, if (!enroll->service_principals) { assert (enroll->service_names != NULL); - - for (i = 0; enroll->service_names[i] != NULL; i++) { - if (asprintf (&name, "%s/%s", enroll->service_names[i], enroll->computer_name) < 0) - return_unexpected_if_reached (); - enroll->service_principals = _adcli_strv_add (enroll->service_principals, - name, &length); - - if (enroll->host_fqdn) { - if (asprintf (&name, "%s/%s", enroll->service_names[i], enroll->host_fqdn) < 0) - return_unexpected_if_reached (); - enroll->service_principals = _adcli_strv_add (enroll->service_principals, - name, &length); - } - } + return add_service_names_to_service_principals (enroll); } return ADCLI_SUCCESS; @@ -351,6 +362,7 @@ ensure_keytab_principals (adcli_result res, return_unexpected_if_fail (k5 != NULL); enroll->keytab_principals = calloc (count + 3, sizeof (krb5_principal)); + return_unexpected_if_fail (enroll->keytab_principals != NULL); at = 0; /* First add the principal for the computer account name */ @@ -1261,7 +1273,7 @@ update_computer_account (adcli_enroll *enroll) } } - if (res == ADCLI_SUCCESS && !enroll->user_princpal_generate) { + if (res == ADCLI_SUCCESS && enroll->user_principal != NULL && !enroll->user_princpal_generate) { char *vals_userPrincipalName[] = { enroll->user_principal, NULL }; LDAPMod userPrincipalName = { LDAP_MOD_REPLACE, "userPrincipalName", { vals_userPrincipalName, }, }; LDAPMod *mods[] = { &userPrincipalName, NULL, }; @@ -1514,7 +1526,8 @@ add_principal_to_keytab (adcli_enroll *enroll, krb5_context k5, krb5_principal principal, const char *principal_name, - int *which_salt) + int *which_salt, + adcli_enroll_flags flags) { match_principal_kvno closure; krb5_data password; @@ -1542,41 +1555,47 @@ add_principal_to_keytab (adcli_enroll *enroll, enroll->keytab_name); } - password.data = enroll->computer_password; - password.length = strlen (enroll->computer_password); - enctypes = adcli_enroll_get_keytab_enctypes (enroll); - /* - * So we need to discover which salt to use. As a side effect we are - * also testing that our account works. - */ + if (flags & ADCLI_ENROLL_PASSWORD_VALID) { + code = _adcli_krb5_keytab_copy_entries (k5, enroll->keytab, principal, + enroll->kvno, enctypes); + } else { - salts = build_principal_salts (enroll, k5, principal); - return_unexpected_if_fail (salts != NULL); + password.data = enroll->computer_password; + password.length = strlen (enroll->computer_password); - if (*which_salt < 0) { - code = _adcli_krb5_keytab_discover_salt (k5, principal, enroll->kvno, &password, - enctypes, salts, which_salt); - if (code != 0) { - _adcli_warn ("Couldn't authenticate with keytab while discovering which salt to use: %s: %s", - principal_name, krb5_get_error_message (k5, code)); - *which_salt = DEFAULT_SALT; - } else { - assert (*which_salt >= 0); - _adcli_info ("Discovered which keytab salt to use"); + /* + * So we need to discover which salt to use. As a side effect we are + * also testing that our account works. + */ + + salts = build_principal_salts (enroll, k5, principal); + return_unexpected_if_fail (salts != NULL); + + if (*which_salt < 0) { + code = _adcli_krb5_keytab_discover_salt (k5, principal, enroll->kvno, &password, + enctypes, salts, which_salt); + if (code != 0) { + _adcli_warn ("Couldn't authenticate with keytab while discovering which salt to use: %s: %s", + principal_name, krb5_get_error_message (k5, code)); + *which_salt = DEFAULT_SALT; + } else { + assert (*which_salt >= 0); + _adcli_info ("Discovered which keytab salt to use"); + } } - } - code = _adcli_krb5_keytab_add_entries (k5, enroll->keytab, principal, - enroll->kvno, &password, enctypes, &salts[*which_salt]); + code = _adcli_krb5_keytab_add_entries (k5, enroll->keytab, principal, + enroll->kvno, &password, enctypes, &salts[*which_salt]); - free_principal_salts (k5, salts); + free_principal_salts (k5, salts); - if (code != 0) { - _adcli_err ("Couldn't add keytab entries: %s: %s", - enroll->keytab_name, krb5_get_error_message (k5, code)); - return ADCLI_ERR_FAIL; + if (code != 0) { + _adcli_err ("Couldn't add keytab entries: %s: %s", + enroll->keytab_name, krb5_get_error_message (k5, code)); + return ADCLI_ERR_FAIL; + } } @@ -1586,7 +1605,8 @@ add_principal_to_keytab (adcli_enroll *enroll, } static adcli_result -update_keytab_for_principals (adcli_enroll *enroll) +update_keytab_for_principals (adcli_enroll *enroll, + adcli_enroll_flags flags) { krb5_context k5; adcli_result res; @@ -1603,7 +1623,7 @@ update_keytab_for_principals (adcli_enroll *enroll) if (krb5_unparse_name (k5, enroll->keytab_principals[i], &name) != 0) name = ""; res = add_principal_to_keytab (enroll, k5, enroll->keytab_principals[i], - name, &which_salt); + name, &which_salt, flags); krb5_free_unparsed_name (k5, name); if (res != ADCLI_SUCCESS) @@ -1765,6 +1785,20 @@ enroll_join_or_update_tasks (adcli_enroll *enroll, /* We ignore failures of setting these fields */ update_and_calculate_enctypes (enroll); update_computer_account (enroll); + + /* service_names is only set from input on the command line, so no + * additional check for explicit is needed here */ + if (enroll->service_names != NULL) { + res = add_service_names_to_service_principals (enroll); + if (res != ADCLI_SUCCESS) { + return res; + } + res = ensure_keytab_principals (res, enroll); + if (res != ADCLI_SUCCESS) { + return res; + } + } + update_service_principals (enroll); if (flags & ADCLI_ENROLL_NO_KEYTAB) @@ -1775,7 +1809,7 @@ enroll_join_or_update_tasks (adcli_enroll *enroll, * that we use for salting. */ - return update_keytab_for_principals (enroll); + return update_keytab_for_principals (enroll, flags); } adcli_result @@ -1876,7 +1910,11 @@ adcli_enroll_update (adcli_enroll *enroll, if (_adcli_check_nt_time_string_lifetime (value, adcli_enroll_get_computer_password_lifetime (enroll))) { - flags |= ADCLI_ENROLL_NO_KEYTAB; + /* Do not update keytab if neither new service principals have + * to be added nor the user principal has to be changed. */ + if (enroll->service_names == NULL && (enroll->user_principal == NULL || enroll->user_princpal_generate)) { + flags |= ADCLI_ENROLL_NO_KEYTAB; + } flags |= ADCLI_ENROLL_PASSWORD_VALID; } free (value); diff --git a/library/adkrb5.c b/library/adkrb5.c index b0e903e..033c181 100644 --- a/library/adkrb5.c +++ b/library/adkrb5.c @@ -204,6 +204,119 @@ _adcli_krb5_open_keytab (krb5_context k5, return ADCLI_SUCCESS; } +typedef struct { + krb5_kvno kvno; + krb5_enctype enctype; + int matched; +} match_enctype_kvno; + +static krb5_boolean +match_enctype_and_kvno (krb5_context k5, + krb5_keytab_entry *entry, + void *data) +{ + krb5_boolean similar = FALSE; + match_enctype_kvno *closure = data; + krb5_error_code code; + + assert (closure->enctype); + + code = krb5_c_enctype_compare (k5, closure->enctype, entry->key.enctype, + &similar); + + if (code == 0 && entry->vno == closure->kvno && similar) { + closure->matched = 1; + return 1; + } + + return 0; +} + +static krb5_error_code +_adcli_krb5_get_keyblock (krb5_context k5, + krb5_keytab keytab, + krb5_keyblock *keyblock, + krb5_boolean (* match_func) (krb5_context, + krb5_keytab_entry *, + void *), + void *match_data) +{ + krb5_kt_cursor cursor; + krb5_keytab_entry entry; + krb5_error_code code; + + code = krb5_kt_start_seq_get (k5, keytab, &cursor); + if (code == KRB5_KT_END || code == ENOENT) + return 0; + else if (code != 0) + return code; + + for (;;) { + code = krb5_kt_next_entry (k5, keytab, &entry, &cursor); + if (code != 0) + break; + + /* See if we should remove this entry */ + if (!match_func (k5, &entry, match_data)) { + krb5_free_keytab_entry_contents (k5, &entry); + continue; + } + + code = krb5_copy_keyblock_contents (k5, &entry.key, keyblock); + krb5_free_keytab_entry_contents (k5, &entry); + break; + + + } + + if (code == KRB5_KT_END) + code = 0; + + krb5_kt_end_seq_get (k5, keytab, &cursor); + return code; +} + +krb5_error_code +_adcli_krb5_keytab_copy_entries (krb5_context k5, + krb5_keytab keytab, + krb5_principal principal, + krb5_kvno kvno, + krb5_enctype *enctypes) +{ + krb5_keytab_entry entry; + krb5_error_code code; + int i; + match_enctype_kvno closure; + + for (i = 0; enctypes[i] != 0; i++) { + + closure.kvno = kvno; + closure.enctype = enctypes[i]; + closure.matched = 0; + + memset (&entry, 0, sizeof (entry)); + + code = _adcli_krb5_get_keyblock (k5, keytab, &entry.key, + match_enctype_and_kvno, &closure); + if (code != 0) { + return code; + } + + + entry.principal = principal; + entry.vno = kvno; + + code = krb5_kt_add_entry (k5, keytab, &entry); + + entry.principal = NULL; + krb5_free_keytab_entry_contents (k5, &entry); + + if (code != 0) + return code; + } + + return 0; +} krb5_error_code _adcli_krb5_keytab_add_entries (krb5_context k5, diff --git a/library/adprivate.h b/library/adprivate.h index 83a88f6..7485249 100644 --- a/library/adprivate.h +++ b/library/adprivate.h @@ -282,6 +282,12 @@ krb5_enctype * _adcli_krb5_parse_enctypes (const char *value); char * _adcli_krb5_format_enctypes (krb5_enctype *enctypes); +krb5_error_code _adcli_krb5_keytab_copy_entries (krb5_context k5, + krb5_keytab keytab, + krb5_principal principal, + krb5_kvno kvno, + krb5_enctype *enctypes); + struct _adcli_attrs { LDAPMod **mods; int len; -- 2.16.4
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