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a3b937064c
sssd/0056-TOOLS-Add-a-new-sssctl-command-access-report.patch
Lukas Slebodnik 1dedfbb334 Resolves: upstream#3523 - ABRT crash - /usr/libexec/sssd/sssd_nss in setnetgrent_result_timeout 
Resolves: upstream#3588 - sssd_nss consumes more memory until restarted
                          or machine swaps
Resolves: failure in glibc tests
          https://sourceware.org/bugzilla/show_bug.cgi?id=22530
Resolves: upstream#3451 - When sssd is configured with id_provider proxy and
                          auth_provider ldap, login fails if the LDAP server
                          is not allowing anonymous binds
Resolves: upstream#3285 - SSSD needs restart after incorrect clock is
                          corrected with AD
Resolves: upstream#3586 - Give a more detailed debug and system-log message
                          if krb5_init_context() failed
Resolves: rhbz#1431153 - SSSD ships a drop-in configuration snippet
                         in /etc/systemd/system
Backport few upstream features from 1.16.1
2017-12-04 21:42:37 +01:00

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From f4d860aa678d899fdcbcd8c991c99b3b85c5c8e0 Mon Sep 17 00:00:00 2001
From: Jakub Hrozek <jhrozek@redhat.com>
Date: Mon, 23 Oct 2017 18:08:12 +0200
Subject: [PATCH 56/79] TOOLS: Add a new sssctl command access-report
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
Resolves:
https://pagure.io/SSSD/sssd/issue/2840
Reviewed-by: Pavel Březina <pbrezina@redhat.com>
Reviewed-by: Fabiano Fidêncio <fidencio@redhat.com>
---
Makefile.am | 1 +
src/tools/sssctl/sssctl.c | 1 +
src/tools/sssctl/sssctl.h | 5 +
src/tools/sssctl/sssctl_access_report.c | 435 ++++++++++++++++++++++++++++++++
4 files changed, 442 insertions(+)
create mode 100644 src/tools/sssctl/sssctl_access_report.c
diff --git a/Makefile.am b/Makefile.am
index 04e7d59e9fb0fdbdd420573e7d737a9a465b66ea..4c8fe64c3e689c0d411277d58995a4c0fb008dc1 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -1752,6 +1752,7 @@ sssctl_SOURCES = \
src/tools/sssctl/sssctl_sifp.c \
src/tools/sssctl/sssctl_config.c \
src/tools/sssctl/sssctl_user_checks.c \
+ src/tools/sssctl/sssctl_access_report.c \
$(SSSD_TOOLS_OBJ) \
$(NULL)
sssctl_LDADD = \
diff --git a/src/tools/sssctl/sssctl.c b/src/tools/sssctl/sssctl.c
index d9bc897c1a32954bbdd2d4ae2b0a9fb6d2c34752..afaa84bc0b44a0fc91fe8b62c0c1fd36ac4e1e0b 100644
--- a/src/tools/sssctl/sssctl.c
+++ b/src/tools/sssctl/sssctl.c
@@ -264,6 +264,7 @@ int main(int argc, const char **argv)
SSS_TOOL_COMMAND("domain-list", "List available domains", 0, sssctl_domain_list),
SSS_TOOL_COMMAND("domain-status", "Print information about domain", 0, sssctl_domain_status),
SSS_TOOL_COMMAND("user-checks", "Print information about a user and check authentication", 0, sssctl_user_checks),
+ SSS_TOOL_COMMAND("access-report", "Generate access report for a domain", 0, sssctl_access_report),
SSS_TOOL_DELIMITER("Information about cached content:"),
SSS_TOOL_COMMAND("user-show", "Information about cached user", 0, sssctl_user_show),
SSS_TOOL_COMMAND("group-show", "Information about cached group", 0, sssctl_group_show),
diff --git a/src/tools/sssctl/sssctl.h b/src/tools/sssctl/sssctl.h
index 22ca5d41e2c084e64b58bc5aa066414b002e7e8b..70fc19eff07317c264978a1ecb9159ae3acdfced 100644
--- a/src/tools/sssctl/sssctl.h
+++ b/src/tools/sssctl/sssctl.h
@@ -133,4 +133,9 @@ errno_t sssctl_config_check(struct sss_cmdline *cmdline,
errno_t sssctl_user_checks(struct sss_cmdline *cmdline,
struct sss_tool_ctx *tool_ctx,
void *pvt);
+
+errno_t sssctl_access_report(struct sss_cmdline *cmdline,
+ struct sss_tool_ctx *tool_ctx,
+ void *pvt);
+
#endif /* _SSSCTL_H_ */
diff --git a/src/tools/sssctl/sssctl_access_report.c b/src/tools/sssctl/sssctl_access_report.c
new file mode 100644
index 0000000000000000000000000000000000000000..11172329817b4dedaca480ab8a4537149853c330
--- /dev/null
+++ b/src/tools/sssctl/sssctl_access_report.c
@@ -0,0 +1,435 @@
+/*
+ Copyright (C) 2017 Red Hat
+
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU Lesser General Public License as published by
+ the Free Software Foundation; either version 3 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include <security/pam_appl.h>
+
+#include "util/util.h"
+#include "tools/common/sss_tools.h"
+#include "tools/sssctl/sssctl.h"
+
+/*
+ * We're searching the cache directly..
+ */
+#include "providers/ipa/ipa_hbac_private.h"
+#include "providers/ipa/ipa_rules_common.h"
+
+#ifdef HAVE_SECURITY_PAM_MISC_H
+# include <security/pam_misc.h>
+#elif defined(HAVE_SECURITY_OPENPAM_H)
+# include <security/openpam.h>
+#endif
+
+#ifdef HAVE_SECURITY_PAM_MISC_H
+static struct pam_conv conv = {
+ misc_conv,
+ NULL
+};
+#elif defined(HAVE_SECURITY_OPENPAM_H)
+static struct pam_conv conv = {
+ openpam_ttyconv,
+ NULL
+};
+#else
+# error "Missing text based pam conversation function"
+#endif
+
+#ifndef DEFAULT_SERVICE
+#define DEFAULT_SERVICE "system-auth"
+#endif /* DEFAULT_SERVICE */
+
+#ifndef DEFAULT_USER
+#define DEFAULT_USER "admin"
+#endif /* DEFAULT_USER */
+
+typedef errno_t (*sssctl_dom_access_reporter_fn)(struct sss_tool_ctx *tool_ctx,
+ const char *user,
+ const char *service,
+ struct sss_domain_info *domain);
+
+static errno_t run_pam_acct(struct sss_tool_ctx *tool_ctx,
+ const char *user,
+ const char *service,
+ struct sss_domain_info *domain)
+{
+ errno_t ret;
+ pam_handle_t *pamh;
+
+ ret = pam_start(service, user, &conv, &pamh);
+ if (ret != PAM_SUCCESS) {
+ ERROR("pam_start failed: %s\n", pam_strerror(pamh, ret));
+ return EIO;
+ }
+
+ ret = pam_acct_mgmt(pamh, 0);
+ pam_end(pamh, ret);
+ return ret;
+}
+
+static errno_t get_rdn_value(TALLOC_CTX *mem_ctx,
+ struct sss_domain_info *dom,
+ const char *dn_attr,
+ const char **_rdn_value)
+{
+ errno_t ret;
+ TALLOC_CTX *tmp_ctx;
+ struct ldb_dn *dn = NULL;
+ const struct ldb_val *rdn_val;
+ const char *rdn_str;
+
+ tmp_ctx = talloc_new(NULL);
+ if (tmp_ctx == NULL) {
+ return ENOMEM;
+ }
+
+ dn = ldb_dn_new(tmp_ctx, sysdb_ctx_get_ldb(dom->sysdb), dn_attr);
+ if (dn == NULL) {
+ ret = ENOMEM;
+ goto done;
+ }
+
+ rdn_val = ldb_dn_get_rdn_val(dn);
+ if (rdn_val == NULL) {
+ DEBUG(SSSDBG_OP_FAILURE, "No RDN value?\n");
+ ret = ENOMEM;
+ goto done;
+ }
+
+ rdn_str = talloc_strndup(tmp_ctx,
+ (const char *)rdn_val->data,
+ rdn_val->length);
+ if (rdn_str == NULL) {
+ ret = ENOMEM;
+ goto done;
+ }
+
+ ret = EOK;
+ *_rdn_value = talloc_steal(mem_ctx, rdn_str);
+done:
+ talloc_zfree(tmp_ctx);
+ return ret;
+}
+
+static errno_t is_member_group(struct sss_domain_info *dom,
+ const char *dn_attr,
+ const char *group_rdn,
+ bool *_is_group)
+{
+ const char *comp_name;
+ const struct ldb_val *comp_val;
+ TALLOC_CTX *tmp_ctx;
+ bool is_group = false;
+ errno_t ret;
+ struct ldb_dn *dn = NULL;
+
+ tmp_ctx = talloc_new(NULL);
+ if (tmp_ctx == NULL) {
+ return ENOMEM;
+ }
+
+ dn = ldb_dn_new(tmp_ctx, sysdb_ctx_get_ldb(dom->sysdb), dn_attr);
+ if (dn == NULL) {
+ ret = ENOMEM;
+ goto done;
+ }
+
+ comp_name = ldb_dn_get_component_name(dn, 1);
+ comp_val = ldb_dn_get_component_val(dn, 1);
+ if (strcasecmp("cn", comp_name) == 0
+ && strncasecmp(group_rdn,
+ (const char *) comp_val->data,
+ comp_val->length) == 0) {
+ is_group = true;
+ }
+
+ ret = EOK;
+done:
+ *_is_group = is_group;
+ talloc_zfree(tmp_ctx);
+ return ret;
+}
+
+static void print_category(struct sss_domain_info *domain,
+ struct ldb_message *rule_msg,
+ const char *category_attr_name,
+ const char *category_label)
+{
+ struct ldb_message_element *category_attr;
+
+ category_attr = ldb_msg_find_element(rule_msg, category_attr_name);
+ if (category_attr == NULL) {
+ DEBUG(SSSDBG_MINOR_FAILURE, "Cannot find %s\n", category_attr_name);
+ return;
+ }
+
+ if (category_attr->num_values > 0) {
+ PRINT("\t%s: ", category_label);
+ for (unsigned i = 0; i < category_attr->num_values; i++) {
+ PRINT("%s%s",
+ i > 0 ? ", " : "",
+ (const char *) category_attr->values[i].data);
+ }
+ PRINT("\n");
+ }
+}
+
+static void print_member_attr(struct sss_domain_info *domain,
+ struct ldb_message *rule_msg,
+ const char *member_attr_name,
+ const char *group_rdn,
+ const char *object_label,
+ const char *group_label)
+{
+ errno_t ret;
+ TALLOC_CTX *tmp_ctx = NULL;
+ const char **member_names = NULL;
+ size_t name_count = 0;
+ const char **member_group_names = NULL;
+ size_t group_count = 0;
+ struct ldb_message_element *member_attr = NULL;
+
+ tmp_ctx = talloc_new(NULL);
+ if (tmp_ctx == NULL) {
+ return;
+ }
+
+ member_attr = ldb_msg_find_element(rule_msg, member_attr_name);
+ if (member_attr == NULL) {
+ DEBUG(SSSDBG_MINOR_FAILURE, "Cannot find %s\n", member_attr_name);
+ goto done;
+ }
+
+ member_names = talloc_zero_array(tmp_ctx,
+ const char *,
+ member_attr->num_values + 1);
+ member_group_names = talloc_zero_array(tmp_ctx,
+ const char *,
+ member_attr->num_values + 1);
+ if (member_names == NULL || member_group_names == NULL) {
+ DEBUG(SSSDBG_CRIT_FAILURE, "OOM?\n");
+ goto done;
+ }
+
+ for (size_t i = 0; i < member_attr->num_values; i++) {
+ bool is_group;
+ const char *rdn_string;
+ const char *dn_attr;
+
+ dn_attr = (const char *) member_attr->values[i].data;
+
+ ret = is_member_group(domain, dn_attr, group_rdn, &is_group);
+ if (ret != EOK) {
+ continue;
+ }
+
+ ret = get_rdn_value(tmp_ctx, domain, dn_attr, &rdn_string);
+ if (ret != EOK) {
+ continue;
+ }
+
+ if (is_group == false) {
+ member_names[name_count] = talloc_steal(member_names,
+ rdn_string);
+ if (member_names[name_count] == NULL) {
+ goto done;
+ }
+ name_count++;
+ } else {
+ member_group_names[group_count] = talloc_strdup(member_group_names,
+ rdn_string);
+ if (member_group_names[group_count] == NULL) {
+ goto done;
+ }
+ group_count++;
+ }
+ }
+
+ if (member_names[0] != NULL) {
+ PRINT("\t%s: ", object_label);
+ for (int i = 0; member_names[i]; i++) {
+ PRINT("%s%s", i > 0 ? ", " : "", member_names[i]);
+ }
+ PRINT("\n");
+ }
+
+ if (member_group_names[0] != NULL) {
+ PRINT("\t%s: ", group_label);
+ for (int i = 0; member_group_names[i]; i++) {
+ PRINT("%s%s", i > 0 ? ", " : "", member_group_names[i]);
+ }
+ PRINT("\n");
+ }
+
+done:
+ talloc_free(tmp_ctx);
+}
+
+static void print_ipa_hbac_rule(struct sss_domain_info *domain,
+ struct ldb_message *rule_msg)
+{
+ struct ldb_message_element *el;
+
+ el = ldb_msg_find_element(rule_msg, IPA_CN);
+ if (el == NULL || el->num_values < 1) {
+ DEBUG(SSSDBG_MINOR_FAILURE, "A rule with no name\n");
+ return;
+ }
+
+ PRINT("Rule name: %1$s\n", el->values[0].data);
+
+ print_member_attr(domain,
+ rule_msg,
+ IPA_MEMBER_USER,
+ "groups",
+ _("Member users"),
+ _("Member groups"));
+ print_category(domain,
+ rule_msg,
+ IPA_USER_CATEGORY,
+ _("User category"));
+
+ print_member_attr(domain,
+ rule_msg,
+ IPA_MEMBER_SERVICE,
+ "hbacservicegroups",
+ _("Member services"),
+ _("Member service groups"));
+ print_category(domain,
+ rule_msg,
+ IPA_SERVICE_CATEGORY,
+ _("Service category"));
+
+ PRINT("\n");
+}
+
+static errno_t sssctl_ipa_access_report(struct sss_tool_ctx *tool_ctx,
+ const char *user,
+ const char *service,
+ struct sss_domain_info *domain)
+{
+ TALLOC_CTX *tmp_ctx = NULL;
+ const char *filter = NULL;
+ errno_t ret;
+ const char *attrs[] = {
+ OBJECTCLASS,
+ IPA_CN,
+ IPA_MEMBER_USER,
+ IPA_USER_CATEGORY,
+ IPA_MEMBER_SERVICE,
+ IPA_SERVICE_CATEGORY,
+ IPA_MEMBER_HOST,
+ IPA_HOST_CATEGORY,
+ NULL,
+ };
+ size_t rule_count;
+ struct ldb_message **msgs = NULL;
+
+ /* Run the pam account phase to make sure the rules are fetched by SSSD */
+ ret = run_pam_acct(tool_ctx, user, service, domain);
+ if (ret != PAM_SUCCESS && ret != PAM_PERM_DENIED) {
+ ERROR("Cannot run the PAM account phase, reporting stale rules\n");
+ /* Non-fatal */
+ }
+
+ tmp_ctx = talloc_new(tool_ctx);
+ if (tmp_ctx == NULL) {
+ return ENOMEM;
+ }
+
+ filter = talloc_asprintf(tmp_ctx, "(objectClass=%s)", IPA_HBAC_RULE);
+ if (filter == NULL) {
+ ret = ENOMEM;
+ goto done;
+ }
+
+ ret = sysdb_search_custom(tmp_ctx, domain, filter,
+ HBAC_RULES_SUBDIR, attrs,
+ &rule_count, &msgs);
+ if (ret != EOK && ret != ENOENT) {
+ DEBUG(SSSDBG_CRIT_FAILURE, "Error looking up HBAC rules\n");
+ goto done;
+ }
+
+ if (ret == ENOENT) {
+ PRINT("No cached rules. All users will be denied access\n");
+ ret = EOK;
+ goto done;
+ }
+
+ PRINT("%1$zu rules cached\n\n", rule_count);
+
+ for (size_t i = 0; i < rule_count; i++) {
+ print_ipa_hbac_rule(domain, msgs[i]);
+ }
+
+ ret = EOK;
+done:
+ talloc_zfree(tmp_ctx);
+ return ret;
+}
+
+sssctl_dom_access_reporter_fn get_report_fn(const char *provider)
+{
+ if (strcmp(provider, "ipa") == 0) {
+ return sssctl_ipa_access_report;
+ }
+
+ return NULL;
+}
+
+errno_t sssctl_access_report(struct sss_cmdline *cmdline,
+ struct sss_tool_ctx *tool_ctx,
+ void *pvt)
+{
+ errno_t ret;
+ const char *domname = NULL;
+ sssctl_dom_access_reporter_fn reporter;
+ struct sss_domain_info *dom;
+ const char *user = DEFAULT_USER;
+ const char *service = DEFAULT_SERVICE;
+
+ /* Parse command line. */
+ struct poptOption options[] = {
+ { "user", 'u', POPT_ARG_STRING, &user, 0,
+ _("PAM user, default: " DEFAULT_USER), NULL },
+ { "service", 's', POPT_ARG_STRING, &service, 0,
+ _("PAM service, default: " DEFAULT_SERVICE), NULL },
+ POPT_TABLEEND
+ };
+
+ ret = sss_tool_popt_ex(cmdline, options, SSS_TOOL_OPT_OPTIONAL,
+ NULL, NULL, "DOMAIN", _("Specify domain name."),
+ &domname, NULL);
+ if (ret != EOK) {
+ DEBUG(SSSDBG_CRIT_FAILURE, "Unable to parse command arguments\n");
+ return ret;
+ }
+
+ dom = find_domain_by_name(tool_ctx->domains, domname, true);
+ if (dom == NULL) {
+ ERROR("Cannot find domain %1$s\n", domname);
+ return ERR_DOMAIN_NOT_FOUND;
+ }
+
+ reporter = get_report_fn(dom->provider);
+ if (reporter == NULL) {
+ ERROR("Access report not implemented for domains of type %1$s\n",
+ dom->provider);
+ return ret;
+ }
+
+ return reporter(tool_ctx, user, service, dom);
+}
--
2.15.1
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