diff options
Diffstat (limited to 'libapol/src/type-query.c')
| -rw-r--r-- | libapol/src/type-query.c | 202 |
1 files changed, 202 insertions, 0 deletions
diff --git a/libapol/src/type-query.c b/libapol/src/type-query.c new file mode 100644 index 0000000..7ead836 --- /dev/null +++ b/libapol/src/type-query.c @@ -0,0 +1,202 @@ +/** + * @file + * + * Provides a way for setools to make queries about types and + * attributes 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> + +struct apol_type_query +{ + char *type_name; + unsigned int flags; + regex_t *regex; +}; + +struct apol_attr_query +{ + char *attr_name; + unsigned int flags; + regex_t *regex; +}; + +/******************** type queries ********************/ + +int apol_type_get_by_query(const apol_policy_t * p, apol_type_query_t * t, apol_vector_t ** v) +{ + qpol_iterator_t *iter; + int retval = -1; + *v = NULL; + if (qpol_policy_get_type_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)) { + const qpol_type_t *type; + unsigned char isattr, isalias; + if (qpol_iterator_get_item(iter, (void **)&type) < 0) { + goto cleanup; + } + if (qpol_type_get_isattr(p->p, type, &isattr) < 0 || qpol_type_get_isalias(p->p, type, &isalias) < 0) { + goto cleanup; + } + if (isattr || isalias) { + continue; + } + if (t != NULL) { + int compval = apol_compare_type(p, + type, t->type_name, + t->flags, &(t->regex)); + if (compval < 0) { + goto cleanup; + } else if (compval == 0) { + continue; + } + } + if (apol_vector_append(*v, (void *)type)) { + ERR(p, "%s", strerror(ENOMEM)); + goto cleanup; + } + } + + retval = 0; + cleanup: + if (retval != 0) { + apol_vector_destroy(v); + } + qpol_iterator_destroy(&iter); + return retval; +} + +apol_type_query_t *apol_type_query_create(void) +{ + return calloc(1, sizeof(apol_type_query_t)); +} + +void apol_type_query_destroy(apol_type_query_t ** t) +{ + if (*t != NULL) { + free((*t)->type_name); + apol_regex_destroy(&(*t)->regex); + free(*t); + *t = NULL; + } +} + +int apol_type_query_set_type(const apol_policy_t * p, apol_type_query_t * t, const char *name) +{ + return apol_query_set(p, &t->type_name, &t->regex, name); +} + +int apol_type_query_set_regex(const apol_policy_t * p, apol_type_query_t * t, int is_regex) +{ + return apol_query_set_regex(p, &t->flags, is_regex); +} + +/******************** attribute queries ********************/ + +int apol_attr_get_by_query(const apol_policy_t * p, apol_attr_query_t * a, apol_vector_t ** v) +{ + qpol_iterator_t *iter; + int retval = -1; + *v = NULL; + if (qpol_policy_get_type_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_type_t *type; + unsigned char isattr, isalias; + if (qpol_iterator_get_item(iter, (void **)&type) < 0) { + goto cleanup; + } + if (qpol_type_get_isattr(p->p, type, &isattr) < 0 || qpol_type_get_isalias(p->p, type, &isalias) < 0) { + goto cleanup; + } + if (!isattr || isalias) { + continue; + } + if (a != NULL) { + const char *attr_name; + int compval; + if (qpol_type_get_name(p->p, type, &attr_name) < 0) { + goto cleanup; + } + compval = apol_compare(p, attr_name, a->attr_name, a->flags, &(a->regex)); + if (compval < 0) { + goto cleanup; + } else if (compval == 0) { + continue; + } + } + if (apol_vector_append(*v, type)) { + ERR(p, "%s", strerror(ENOMEM)); + goto cleanup; + } + } + + retval = 0; + cleanup: + if (retval != 0) { + apol_vector_destroy(v); + } + qpol_iterator_destroy(&iter); + return retval; +} + +apol_attr_query_t *apol_attr_query_create(void) +{ + return calloc(1, sizeof(apol_attr_query_t)); +} + +void apol_attr_query_destroy(apol_attr_query_t ** a) +{ + if (*a != NULL) { + free((*a)->attr_name); + apol_regex_destroy(&(*a)->regex); + free(*a); + *a = NULL; + } +} + +int apol_attr_query_set_attr(const apol_policy_t * p, apol_attr_query_t * a, const char *name) +{ + return apol_query_set(p, &a->attr_name, &a->regex, name); +} + +int apol_attr_query_set_regex(const apol_policy_t * p, apol_attr_query_t * a, int is_regex) +{ + return apol_query_set_regex(p, &a->flags, is_regex); +} |