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-rw-r--r--libapol/src/class-perm-query.c327
1 files changed, 327 insertions, 0 deletions
diff --git a/libapol/src/class-perm-query.c b/libapol/src/class-perm-query.c
new file mode 100644
index 0000000..938994d
--- /dev/null
+++ b/libapol/src/class-perm-query.c
@@ -0,0 +1,327 @@
+/**
+ * @file
+ *
+ * Provides a way for setools to make queries about classes, commons,
+ * and permissions within a policy. The caller obtains a query
+ * object, fills in its parameters, and then runs the query; it
+ * obtains a vector of results. Searches are conjunctive -- all
+ * fields of the search query must match for a datum to be added to
+ * the results query.
+ *
+ * @author Jeremy A. Mowery jmowery@tresys.com
+ * @author Jason Tang jtang@tresys.com
+ *
+ * Copyright (C) 2006-2007 Tresys Technology, LLC
+ *
+ * This library 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 2.1 of the License, or (at your option) any later version.
+ *
+ * This library 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 library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include "policy-query-internal.h"
+#include <errno.h>
+#include <string.h>
+
+struct apol_class_query
+{
+ char *class_name, *common_name;
+ unsigned int flags;
+ regex_t *class_regex, *common_regex;
+};
+
+struct apol_common_query
+{
+ char *common_name;
+ unsigned int flags;
+ regex_t *regex;
+};
+
+struct apol_perm_query
+{
+ char *perm_name;
+ unsigned int flags;
+ regex_t *regex;
+};
+
+/******************** class queries ********************/
+
+int apol_class_get_by_query(const apol_policy_t * p, apol_class_query_t * c, apol_vector_t ** v)
+{
+ qpol_iterator_t *iter = NULL, *perm_iter = NULL;
+ int retval = -1, append_class;
+ *v = NULL;
+ if (qpol_policy_get_class_iter(p->p, &iter) < 0) {
+ return -1;
+ }
+ if ((*v = apol_vector_create(NULL)) == NULL) {
+ ERR(p, "%s", strerror(errno));
+ goto cleanup;
+ }
+ for (; !qpol_iterator_end(iter); qpol_iterator_next(iter)) {
+ qpol_class_t *class_datum;
+ if (qpol_iterator_get_item(iter, (void **)&class_datum) < 0) {
+ goto cleanup;
+ }
+ append_class = 1;
+ if (c != NULL) {
+ const char *class_name, *common_name = NULL;
+ const qpol_common_t *common_datum;
+ int compval;
+ if (qpol_class_get_name(p->p, class_datum, &class_name) < 0) {
+ goto cleanup;
+ }
+ compval = apol_compare(p, class_name, c->class_name, c->flags, &(c->class_regex));
+ if (compval < 0) {
+ goto cleanup;
+ } else if (compval == 0) {
+ continue;
+ }
+ if (qpol_class_get_common(p->p, class_datum, &common_datum) < 0) {
+ goto cleanup;
+ }
+ if (common_datum == NULL) {
+ if (c->common_name != NULL && c->common_name[0] != '\0') {
+ continue;
+ }
+ } else {
+ if (qpol_common_get_name(p->p, common_datum, &common_name) < 0) {
+ goto cleanup;
+ }
+ compval = apol_compare(p, common_name, c->common_name, c->flags, &(c->common_regex));
+ if (compval < 0) {
+ goto cleanup;
+ } else if (compval == 0) {
+ continue;
+ }
+ }
+ }
+ if (append_class && apol_vector_append(*v, class_datum)) {
+ ERR(p, "%s", strerror(ENOMEM));
+ goto cleanup;
+ }
+ }
+
+ retval = 0;
+ cleanup:
+ if (retval != 0) {
+ apol_vector_destroy(v);
+ }
+ qpol_iterator_destroy(&iter);
+ qpol_iterator_destroy(&perm_iter);
+ return retval;
+}
+
+apol_class_query_t *apol_class_query_create(void)
+{
+ return calloc(1, sizeof(apol_class_query_t));
+}
+
+void apol_class_query_destroy(apol_class_query_t ** c)
+{
+ if (*c != NULL) {
+ free((*c)->class_name);
+ free((*c)->common_name);
+ apol_regex_destroy(&(*c)->class_regex);
+ apol_regex_destroy(&(*c)->common_regex);
+ free(*c);
+ *c = NULL;
+ }
+}
+
+int apol_class_query_set_class(const apol_policy_t * p, apol_class_query_t * c, const char *name)
+{
+ return apol_query_set(p, &c->class_name, &c->class_regex, name);
+}
+
+int apol_class_query_set_common(const apol_policy_t * p, apol_class_query_t * c, const char *name)
+{
+ return apol_query_set(p, &c->common_name, &c->common_regex, name);
+}
+
+int apol_class_query_set_regex(const apol_policy_t * p, apol_class_query_t * c, int is_regex)
+{
+ return apol_query_set_regex(p, &c->flags, is_regex);
+}
+
+/******************** common queries ********************/
+
+int apol_common_get_by_query(const apol_policy_t * p, apol_common_query_t * c, apol_vector_t ** v)
+{
+ qpol_iterator_t *iter = NULL;
+ int retval = -1;
+ *v = NULL;
+ if (qpol_policy_get_common_iter(p->p, &iter) < 0) {
+ return -1;
+ }
+ if ((*v = apol_vector_create(NULL)) == NULL) {
+ ERR(p, "%s", strerror(errno));
+ goto cleanup;
+ }
+ for (; !qpol_iterator_end(iter); qpol_iterator_next(iter)) {
+ qpol_common_t *common_datum;
+ if (qpol_iterator_get_item(iter, (void **)&common_datum) < 0) {
+ goto cleanup;
+ }
+ if (c != NULL) {
+ const char *common_name = NULL;
+ int compval;
+ if (qpol_common_get_name(p->p, common_datum, &common_name) < 0) {
+ goto cleanup;
+ }
+ compval = apol_compare(p, common_name, c->common_name, c->flags, &(c->regex));
+ if (compval < 0) {
+ goto cleanup;
+ } else if (compval == 0) {
+ continue;
+ }
+ }
+ if (apol_vector_append(*v, common_datum)) {
+ ERR(p, "%s", strerror(errno));
+ goto cleanup;
+ }
+ }
+
+ retval = 0;
+ cleanup:
+ if (retval != 0) {
+ apol_vector_destroy(v);
+ }
+ qpol_iterator_destroy(&iter);
+ return retval;
+}
+
+apol_common_query_t *apol_common_query_create(void)
+{
+ return calloc(1, sizeof(apol_common_query_t));
+}
+
+void apol_common_query_destroy(apol_common_query_t ** c)
+{
+ if (*c != NULL) {
+ free((*c)->common_name);
+ apol_regex_destroy(&(*c)->regex);
+ free(*c);
+ *c = NULL;
+ }
+}
+
+int apol_common_query_set_common(const apol_policy_t * p, apol_common_query_t * c, const char *name)
+{
+ return apol_query_set(p, &c->common_name, &c->regex, name);
+}
+
+int apol_common_query_set_regex(const apol_policy_t * p, apol_common_query_t * c, int is_regex)
+{
+ return apol_query_set_regex(p, &c->flags, is_regex);
+}
+
+/******************** permission queries ********************/
+
+int apol_perm_get_by_query(const apol_policy_t * p, apol_perm_query_t * pq, apol_vector_t ** v)
+{
+ qpol_iterator_t *class_iter = NULL, *common_iter = NULL, *perm_iter = NULL;
+ int retval = -1, compval;
+ char *perm_name;
+ *v = NULL;
+ if (qpol_policy_get_class_iter(p->p, &class_iter) < 0 || qpol_policy_get_common_iter(p->p, &common_iter) < 0) {
+ goto cleanup;
+ }
+ if ((*v = apol_vector_create(NULL)) == NULL) {
+ ERR(p, "%s", strerror(errno));
+ goto cleanup;
+ }
+ for (; !qpol_iterator_end(class_iter); qpol_iterator_next(class_iter)) {
+ qpol_class_t *class_datum;
+ if (qpol_iterator_get_item(class_iter, (void **)&class_datum) < 0 ||
+ qpol_class_get_perm_iter(p->p, class_datum, &perm_iter) < 0) {
+ goto cleanup;
+ }
+ for (; !qpol_iterator_end(perm_iter); qpol_iterator_next(perm_iter)) {
+ if (qpol_iterator_get_item(perm_iter, (void **)&perm_name) < 0) {
+ goto cleanup;
+ }
+ if (pq == NULL) {
+ compval = 1;
+ } else {
+ compval = apol_compare(p, perm_name, pq->perm_name, pq->flags, &(pq->regex));
+ }
+ if (compval < 0) {
+ goto cleanup;
+ } else if (compval == 1 && apol_vector_append_unique(*v, perm_name, apol_str_strcmp, NULL) < 0) {
+ ERR(p, "%s", strerror(ENOMEM));
+ goto cleanup;
+ }
+ }
+ qpol_iterator_destroy(&perm_iter);
+ }
+
+ for (; !qpol_iterator_end(common_iter); qpol_iterator_next(common_iter)) {
+ qpol_common_t *common_datum;
+ if (qpol_iterator_get_item(common_iter, (void **)&common_datum) < 0 ||
+ qpol_common_get_perm_iter(p->p, common_datum, &perm_iter) < 0) {
+ goto cleanup;
+ }
+ for (; !qpol_iterator_end(perm_iter); qpol_iterator_next(perm_iter)) {
+ if (qpol_iterator_get_item(perm_iter, (void **)&perm_name) < 0) {
+ goto cleanup;
+ }
+ if (pq == NULL) {
+ compval = 1;
+ } else {
+ compval = apol_compare(p, perm_name, pq->perm_name, pq->flags, &(pq->regex));
+ }
+ if (compval < 0) {
+ goto cleanup;
+ } else if (compval == 1 && apol_vector_append_unique(*v, perm_name, apol_str_strcmp, NULL) < 0) {
+ ERR(p, "%s", strerror(ENOMEM));
+ goto cleanup;
+ }
+ }
+ qpol_iterator_destroy(&perm_iter);
+ }
+
+ retval = 0;
+ cleanup:
+ if (retval != 0) {
+ apol_vector_destroy(v);
+ }
+ qpol_iterator_destroy(&class_iter);
+ qpol_iterator_destroy(&common_iter);
+ qpol_iterator_destroy(&perm_iter);
+ return retval;
+}
+
+apol_perm_query_t *apol_perm_query_create(void)
+{
+ return calloc(1, sizeof(apol_perm_query_t));
+}
+
+void apol_perm_query_destroy(apol_perm_query_t ** pq)
+{
+ if (*pq != NULL) {
+ free((*pq)->perm_name);
+ apol_regex_destroy(&(*pq)->regex);
+ free(*pq);
+ *pq = NULL;
+ }
+}
+
+int apol_perm_query_set_perm(const apol_policy_t * p, apol_perm_query_t * pq, const char *name)
+{
+ return apol_query_set(p, &pq->perm_name, &pq->regex, name);
+}
+
+int apol_perm_query_set_regex(const apol_policy_t * p, apol_perm_query_t * pq, int is_regex)
+{
+ return apol_query_set_regex(p, &pq->flags, is_regex);
+}
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