diff options
Diffstat (limited to 'libapol/src/mls-query.c')
| -rw-r--r-- | libapol/src/mls-query.c | 248 |
1 files changed, 248 insertions, 0 deletions
diff --git a/libapol/src/mls-query.c b/libapol/src/mls-query.c new file mode 100644 index 0000000..6fccc54 --- /dev/null +++ b/libapol/src/mls-query.c @@ -0,0 +1,248 @@ +/** + * @file + * Implementation for querying MLS components. + * + * @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 <config.h> + +#include <assert.h> +#include <errno.h> +#include <regex.h> +#include <stdlib.h> +#include <string.h> + +#include <qpol/iterator.h> + +#include "policy-query-internal.h" +#include <apol/vector.h> + +struct apol_level_query +{ + char *sens_name, *cat_name; + unsigned int flags; + regex_t *sens_regex, *cat_regex; +}; + +struct apol_cat_query +{ + char *cat_name; + unsigned int flags; + regex_t *regex; +}; + +int apol_mls_sens_compare(const apol_policy_t * p, const char *sens1, const char *sens2) +{ + const qpol_level_t *level_datum1, *level_datum2; + if (qpol_policy_get_level_by_name(p->p, sens1, &level_datum1) < 0 || + qpol_policy_get_level_by_name(p->p, sens2, &level_datum2) < 0) { + return -1; + } + if (level_datum1 == level_datum2) { + return 1; + } + return 0; +} + +int apol_mls_cats_compare(const apol_policy_t * p, const char *cat1, const char *cat2) +{ + const qpol_cat_t *qcat1, *qcat2; + if (qpol_policy_get_cat_by_name(p->p, cat1, &qcat1) < 0 || qpol_policy_get_cat_by_name(p->p, cat2, &qcat2) < 0) { + return -1; + } + if (qcat1 == qcat2) { + return 1; + } + return 0; +} + +/******************** level queries ********************/ + +int apol_level_get_by_query(const apol_policy_t * p, apol_level_query_t * l, apol_vector_t ** v) +{ + qpol_iterator_t *iter, *cat_iter = NULL; + int retval = -1, append_level; + *v = NULL; + if (qpol_policy_get_level_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_level_t *level; + unsigned char isalias; + if (qpol_iterator_get_item(iter, (void **)&level) < 0 || qpol_level_get_isalias(p->p, level, &isalias) < 0) { + goto cleanup; + } + if (isalias) { + continue; + } + append_level = 1; + if (l != NULL) { + int compval = apol_compare_level(p, + level, l->sens_name, + l->flags, &(l->sens_regex)); + if (compval < 0) { + goto cleanup; + } else if (compval == 0) { + continue; + } + if (qpol_level_get_cat_iter(p->p, level, &cat_iter) < 0) { + goto cleanup; + } + append_level = 0; + for (; !qpol_iterator_end(cat_iter); qpol_iterator_next(cat_iter)) { + qpol_cat_t *cat; + if (qpol_iterator_get_item(cat_iter, (void **)&cat) < 0) { + goto cleanup; + } + compval = apol_compare_cat(p, cat, l->cat_name, l->flags, &(l->cat_regex)); + if (compval < 0) { + goto cleanup; + } else if (compval == 1) { + append_level = 1; + break; + } + } + qpol_iterator_destroy(&cat_iter); + } + if (append_level && apol_vector_append(*v, level)) { + ERR(p, "%s", strerror(ENOMEM)); + goto cleanup; + } + } + + retval = 0; + cleanup: + if (retval != 0) { + apol_vector_destroy(v); + } + qpol_iterator_destroy(&iter); + qpol_iterator_destroy(&cat_iter); + return retval; +} + +apol_level_query_t *apol_level_query_create(void) +{ + return calloc(1, sizeof(apol_level_query_t)); +} + +void apol_level_query_destroy(apol_level_query_t ** l) +{ + if (*l != NULL) { + free((*l)->sens_name); + free((*l)->cat_name); + apol_regex_destroy(&(*l)->sens_regex); + apol_regex_destroy(&(*l)->cat_regex); + free(*l); + *l = NULL; + } +} + +int apol_level_query_set_sens(const apol_policy_t * p, apol_level_query_t * l, const char *name) +{ + return apol_query_set(p, &l->sens_name, &l->sens_regex, name); +} + +int apol_level_query_set_cat(const apol_policy_t * p, apol_level_query_t * l, const char *name) +{ + return apol_query_set(p, &l->cat_name, &l->cat_regex, name); +} + +int apol_level_query_set_regex(const apol_policy_t * p, apol_level_query_t * l, int is_regex) +{ + return apol_query_set_regex(p, &l->flags, is_regex); +} + +/******************** category queries ********************/ + +int apol_cat_get_by_query(const apol_policy_t * p, apol_cat_query_t * c, apol_vector_t ** v) +{ + qpol_iterator_t *iter; + int retval = -1; + *v = NULL; + if (qpol_policy_get_cat_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_cat_t *cat; + unsigned char isalias; + if (qpol_iterator_get_item(iter, (void **)&cat) < 0 || qpol_cat_get_isalias(p->p, cat, &isalias) < 0) { + goto cleanup; + } + if (isalias) { + continue; + } + if (c != NULL) { + int compval = apol_compare_cat(p, + cat, c->cat_name, + c->flags, &(c->regex)); + if (compval < 0) { + goto cleanup; + } else if (compval == 0) { + continue; + } + } + if (apol_vector_append(*v, cat)) { + ERR(p, "%s", strerror(ENOMEM)); + goto cleanup; + } + } + + retval = 0; + cleanup: + if (retval != 0) { + apol_vector_destroy(v); + } + qpol_iterator_destroy(&iter); + return retval; +} + +apol_cat_query_t *apol_cat_query_create(void) +{ + return calloc(1, sizeof(apol_cat_query_t)); +} + +void apol_cat_query_destroy(apol_cat_query_t ** c) +{ + if (*c != NULL) { + free((*c)->cat_name); + apol_regex_destroy(&(*c)->regex); + free(*c); + *c = NULL; + } +} + +int apol_cat_query_set_cat(const apol_policy_t * p, apol_cat_query_t * c, const char *name) +{ + return apol_query_set(p, &c->cat_name, &c->regex, name); +} + +int apol_cat_query_set_regex(const apol_policy_t * p, apol_cat_query_t * c, int is_regex) +{ + return apol_query_set_regex(p, &c->flags, is_regex); +} |