diff options
Diffstat (limited to 'libapol/src/user-query.c')
-rw-r--r-- | libapol/src/user-query.c | 198 |
1 files changed, 198 insertions, 0 deletions
diff --git a/libapol/src/user-query.c b/libapol/src/user-query.c new file mode 100644 index 0000000..066e005 --- /dev/null +++ b/libapol/src/user-query.c @@ -0,0 +1,198 @@ +/** + * @file + * + * Provides a way for setools to make queries about users 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_user_query +{ + char *user_name, *role_name; + apol_mls_level_t *default_level; + apol_mls_range_t *range; + unsigned int flags; + regex_t *user_regex, *role_regex; +}; + +/******************** user queries ********************/ + +int apol_user_get_by_query(const apol_policy_t * p, apol_user_query_t * u, apol_vector_t ** v) +{ + qpol_iterator_t *iter = NULL, *role_iter = NULL; + apol_mls_level_t *default_level = NULL; + apol_mls_range_t *range = NULL; + int retval = -1, append_user; + *v = NULL; + if (qpol_policy_get_user_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_user_t *user; + if (qpol_iterator_get_item(iter, (void **)&user) < 0) { + goto cleanup; + } + append_user = 1; + if (u != NULL) { + const char *user_name; + int compval; + const qpol_mls_level_t *mls_default_level; + const qpol_mls_range_t *mls_range; + + qpol_iterator_destroy(&role_iter); + apol_mls_level_destroy(&default_level); + apol_mls_range_destroy(&range); + + if (qpol_user_get_name(p->p, user, &user_name) < 0) { + goto cleanup; + } + compval = apol_compare(p, user_name, u->user_name, u->flags, &(u->user_regex)); + if (compval < 0) { + goto cleanup; + } else if (compval == 0) { + continue; + } + if (qpol_user_get_role_iter(p->p, user, &role_iter) < 0) { + goto cleanup; + } + if (u->role_name != NULL && u->role_name[0] != '\0') { + append_user = 0; + for (; !qpol_iterator_end(role_iter); qpol_iterator_next(role_iter)) { + qpol_role_t *role; + const char *role_name; + if (qpol_iterator_get_item(role_iter, (void **)&role) < 0 || + qpol_role_get_name(p->p, role, &role_name) < 0) { + goto cleanup; + } + compval = apol_compare(p, role_name, u->role_name, u->flags, &(u->role_regex)); + if (compval < 0) { + goto cleanup; + } else if (compval == 1) { + append_user = 1; + break; + } + } + } + if (apol_policy_is_mls(p)) { + if (qpol_user_get_dfltlevel(p->p, user, &mls_default_level) < 0 || + (default_level = apol_mls_level_create_from_qpol_mls_level(p, mls_default_level)) == NULL) { + goto cleanup; + } + compval = apol_mls_level_compare(p, default_level, u->default_level); + apol_mls_level_destroy(&default_level); + if (compval < 0) { + goto cleanup; + } else if (compval != APOL_MLS_EQ) { + continue; + } + + if (qpol_user_get_range(p->p, user, &mls_range) < 0 || + (range = apol_mls_range_create_from_qpol_mls_range(p, mls_range)) == NULL) { + goto cleanup; + } + compval = apol_mls_range_compare(p, range, u->range, u->flags); + apol_mls_range_destroy(&range); + if (compval < 0) { + goto cleanup; + } else if (compval == 0) { + continue; + } + } + } + if (append_user && apol_vector_append(*v, user)) { + ERR(p, "%s", strerror(ENOMEM)); + goto cleanup; + } + } + retval = 0; + cleanup: + if (retval != 0) { + apol_vector_destroy(v); + } + qpol_iterator_destroy(&iter); + qpol_iterator_destroy(&role_iter); + apol_mls_level_destroy(&default_level); + apol_mls_range_destroy(&range); + return retval; +} + +apol_user_query_t *apol_user_query_create(void) +{ + return calloc(1, sizeof(apol_user_query_t)); +} + +void apol_user_query_destroy(apol_user_query_t ** u) +{ + if (*u != NULL) { + free((*u)->user_name); + free((*u)->role_name); + apol_mls_level_destroy(&((*u)->default_level)); + apol_mls_range_destroy(&((*u)->range)); + apol_regex_destroy(&(*u)->user_regex); + apol_regex_destroy(&(*u)->role_regex); + free(*u); + *u = NULL; + } +} + +int apol_user_query_set_user(const apol_policy_t * p, apol_user_query_t * u, const char *name) +{ + return apol_query_set(p, &u->user_name, &u->user_regex, name); +} + +int apol_user_query_set_role(const apol_policy_t * p, apol_user_query_t * u, const char *role) +{ + return apol_query_set(p, &u->role_name, &u->role_regex, role); +} + +int apol_user_query_set_default_level(const apol_policy_t * p + __attribute__ ((unused)), apol_user_query_t * u, apol_mls_level_t * level) +{ + u->default_level = level; + return 0; +} + +int apol_user_query_set_range(const apol_policy_t * p __attribute__ ((unused)), + apol_user_query_t * u, apol_mls_range_t * range, unsigned int range_match) +{ + if (u->range != NULL) { + apol_mls_range_destroy(&u->range); + } + u->range = range; + u->flags = (u->flags & ~APOL_QUERY_FLAGS) | range_match; + return 0; +} + +int apol_user_query_set_regex(const apol_policy_t * p, apol_user_query_t * u, int is_regex) +{ + return apol_query_set_regex(p, &u->flags, is_regex); +} |