diff options
Diffstat (limited to 'libapol/src/constraint-query.c')
| -rw-r--r-- | libapol/src/constraint-query.c | 217 |
1 files changed, 217 insertions, 0 deletions
diff --git a/libapol/src/constraint-query.c b/libapol/src/constraint-query.c new file mode 100644 index 0000000..5495975 --- /dev/null +++ b/libapol/src/constraint-query.c @@ -0,0 +1,217 @@ +/** + * @file + * + * Provides a way for setools to make queries about constraint and + * validatetrans statements 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. + * + * @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_constraint_query +{ + char *class_name, *perm_name; + unsigned int flags; + regex_t *class_regex, *perm_regex; +}; + +struct apol_validatetrans_query +{ + char *class_name; + unsigned int flags; + regex_t *regex; +}; + +/******************** constraint queries ********************/ + +int apol_constraint_get_by_query(const apol_policy_t * p, apol_constraint_query_t * c, apol_vector_t ** v) +{ + qpol_iterator_t *iter = NULL, *perm_iter = NULL; + int retval = -1; + *v = NULL; + if (qpol_policy_get_constraint_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_constraint_t *constraint; + if (qpol_iterator_get_item(iter, (void **)&constraint) < 0) { + goto cleanup; + } + if (c != NULL) { + const qpol_class_t *class_datum; + const char *class_name; + int compval; + if (qpol_constraint_get_class(p->p, constraint, &class_datum) < 0 || + 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) { + free(constraint); + continue; + } + + if (qpol_constraint_get_perm_iter(p->p, constraint, &perm_iter) < 0) { + goto cleanup; + } + compval = apol_compare_iter(p, perm_iter, c->perm_name, c->flags, &(c->perm_regex), 1); + qpol_iterator_destroy(&perm_iter); + if (compval < 0) { + goto cleanup; + } else if (compval == 0) { + free(constraint); + continue; + } + } + if (apol_vector_append(*v, constraint)) { + 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_constraint_query_t *apol_constraint_query_create(void) +{ + return calloc(1, sizeof(apol_constraint_query_t)); +} + +void apol_constraint_query_destroy(apol_constraint_query_t ** c) +{ + if (*c != NULL) { + free((*c)->class_name); + free((*c)->perm_name); + apol_regex_destroy(&(*c)->class_regex); + apol_regex_destroy(&(*c)->perm_regex); + free(*c); + *c = NULL; + } +} + +int apol_constraint_query_set_class(const apol_policy_t * p, apol_constraint_query_t * c, const char *name) +{ + return apol_query_set(p, &c->class_name, &c->class_regex, name); +} + +int apol_constraint_query_set_perm(const apol_policy_t * p, apol_constraint_query_t * c, const char *name) +{ + return apol_query_set(p, &c->perm_name, &c->perm_regex, name); +} + +int apol_constraint_query_set_regex(const apol_policy_t * p, apol_constraint_query_t * c, int is_regex) +{ + return apol_query_set_regex(p, &c->flags, is_regex); +} + +/******************** validatetrans queries ********************/ + +int apol_validatetrans_get_by_query(const apol_policy_t * p, apol_validatetrans_query_t * vt, apol_vector_t ** v) +{ + qpol_iterator_t *iter = NULL; + int retval = -1; + *v = NULL; + if (qpol_policy_get_validatetrans_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_validatetrans_t *validatetrans; + if (qpol_iterator_get_item(iter, (void **)&validatetrans) < 0) { + goto cleanup; + } + if (vt != NULL) { + const qpol_class_t *class_datum; + const char *class_name; + int compval; + if (qpol_validatetrans_get_class(p->p, validatetrans, &class_datum) < 0 || + qpol_class_get_name(p->p, class_datum, &class_name) < 0) { + goto cleanup; + } + compval = apol_compare(p, class_name, vt->class_name, vt->flags, &(vt->regex)); + if (compval < 0) { + goto cleanup; + } else if (compval == 0) { + free(validatetrans); + continue; + } + } + if (apol_vector_append(*v, validatetrans)) { + ERR(p, "%s", strerror(ENOMEM)); + goto cleanup; + } + } + + retval = 0; + cleanup: + if (retval != 0) { + apol_vector_destroy(v); + } + qpol_iterator_destroy(&iter); + return retval; +} + +apol_validatetrans_query_t *apol_validatetrans_query_create(void) +{ + return calloc(1, sizeof(apol_validatetrans_query_t)); +} + +void apol_validatetrans_query_destroy(apol_validatetrans_query_t ** vt) +{ + if (*vt != NULL) { + free((*vt)->class_name); + apol_regex_destroy(&(*vt)->regex); + free(*vt); + *vt = NULL; + } +} + +int apol_validatetrans_query_set_class(const apol_policy_t * p, apol_validatetrans_query_t * vt, const char *name) +{ + return apol_query_set(p, &vt->class_name, &vt->regex, name); +} + +int apol_validatetrans_query_set_regex(const apol_policy_t * p, apol_validatetrans_query_t * vt, int is_regex) +{ + return apol_query_set_regex(p, &vt->flags, is_regex); +} |