diff options
Diffstat (limited to 'libapol/src/terule-query.c')
| -rw-r--r-- | libapol/src/terule-query.c | 1049 |
1 files changed, 1049 insertions, 0 deletions
diff --git a/libapol/src/terule-query.c b/libapol/src/terule-query.c new file mode 100644 index 0000000..80a7eff --- /dev/null +++ b/libapol/src/terule-query.c @@ -0,0 +1,1049 @@ +/** + * @file + * + * Provides a way for setools to make queries about type enforcement + * rules 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) 2006-2008 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 <apol/bst.h> +#include <qpol/policy_extend.h> +#include <errno.h> +#include <string.h> + +struct apol_terule_query +{ + char *source, *target, *default_type, *bool_name; + apol_vector_t *classes; + unsigned int rules; + unsigned int flags; +}; + +/** + * Common semantic rule selection routine used in get*rule_by_query. + * @param p Policy to search. + * @param v Vector of rules to populate (of type qpol_terule_t). + * @param rule_type Mask of rules to search. + * @param flags Query options as specified by the apol_terule_query. + * @param source_list If non-NULL, list of types to use as source. + * If NULL, accept all types. + * @param target_list If non-NULL, list of types to use as target. + * If NULL, accept all types. + * @param class_list If non-NULL, list of classes to use. + * If NULL, accept all classes. + * @param default_list If non-NULL, list of types to use as default. + * If NULL, accept all types. + * @param bool_name If non-NULL, find conditional rules affected by this boolean. + * If NULL, all rules will be considered (including unconditional rules). + * @return 0 on success and < 0 on failure. + */ +static int rule_select(const apol_policy_t * p, apol_vector_t * v, uint32_t rule_type, unsigned int flags, + const apol_vector_t * source_list, const apol_vector_t * target_list, const apol_vector_t * class_list, + const apol_vector_t * default_list, const char *bool_name) +{ + qpol_iterator_t *iter = NULL; + int only_enabled = flags & APOL_QUERY_ONLY_ENABLED; + int is_regex = flags & APOL_QUERY_REGEX; + int source_as_any = flags & APOL_QUERY_SOURCE_AS_ANY; + int retv = -1; + regex_t *bool_regex = NULL; + + if (qpol_policy_get_terule_iter(p->p, rule_type, &iter) < 0) { + goto cleanup; + } + + for (; !qpol_iterator_end(iter); qpol_iterator_next(iter)) { + qpol_terule_t *rule; + uint32_t is_enabled; + const qpol_cond_t *cond = NULL; + int match_source = 0, match_target = 0, match_default = 0, match_bool = 0; + size_t i; + if (qpol_iterator_get_item(iter, (void **)&rule) < 0) { + goto cleanup; + } + + if (qpol_terule_get_is_enabled(p->p, rule, &is_enabled) < 0) { + goto cleanup; + } + if (!is_enabled && only_enabled) { + continue; + } + + if (bool_name != NULL) { + if (qpol_terule_get_cond(p->p, rule, &cond) < 0) { + goto cleanup; + } + if (cond == NULL) { + continue; /* skip unconditional rule */ + } + match_bool = apol_compare_cond_expr(p, cond, bool_name, is_regex, &bool_regex); + if (match_bool < 0) { + goto cleanup; + } else if (match_bool == 0) { + continue; + } + } + + if (source_list == NULL) { + match_source = 1; + } else { + const qpol_type_t *source_type; + if (qpol_terule_get_source_type(p->p, rule, &source_type) < 0) { + goto cleanup; + } + if (apol_vector_get_index(source_list, source_type, NULL, NULL, &i) == 0) { + match_source = 1; + } + } + + /* if source did not match, but treating source symbol + * as any field, then delay rejecting this rule until + * the target and default have been checked */ + if (!source_as_any && !match_source) { + continue; + } + + if (target_list == NULL || (source_as_any && match_source)) { + match_target = 1; + } else { + const qpol_type_t *target_type; + if (qpol_terule_get_target_type(p->p, rule, &target_type) < 0) { + goto cleanup; + } + if (apol_vector_get_index(target_list, target_type, NULL, NULL, &i) == 0) { + match_target = 1; + } + } + + if (!source_as_any && !match_target) { + continue; + } + + if (default_list == NULL || (source_as_any && match_source) || (source_as_any && match_target)) { + match_default = 1; + } else { + const qpol_type_t *default_type; + if (qpol_terule_get_default_type(p->p, rule, &default_type) < 0) { + goto cleanup; + } + if (apol_vector_get_index(default_list, default_type, NULL, NULL, &i) == 0) { + match_default = 1; + } + } + + if (!source_as_any && !match_default) { + continue; + } + /* at least one thing must match if source_as_any was given */ + if (source_as_any && (!match_source && !match_target && !match_default)) { + continue; + } + + if (class_list != NULL) { + const qpol_class_t *obj_class; + if (qpol_terule_get_object_class(p->p, rule, &obj_class) < 0) { + goto cleanup; + } + if (apol_vector_get_index(class_list, obj_class, NULL, NULL, &i) < 0) { + continue; + } + } + + if (apol_vector_append(v, rule)) { + ERR(p, "%s", strerror(ENOMEM)); + goto cleanup; + } + } + + retv = 0; + + cleanup: + apol_regex_destroy(&bool_regex); + qpol_iterator_destroy(&iter); + return retv; +} + +int apol_terule_get_by_query(const apol_policy_t * p, const apol_terule_query_t * t, apol_vector_t ** v) +{ + apol_vector_t *source_list = NULL, *target_list = NULL, *class_list = NULL, *default_list = NULL; + int retval = -1, source_as_any = 0, is_regex = 0; + char *bool_name = NULL; + *v = NULL; + unsigned int flags = 0; + + uint32_t rule_type = QPOL_RULE_TYPE_TRANS | QPOL_RULE_TYPE_MEMBER | QPOL_RULE_TYPE_CHANGE; + if (t != NULL) { + if (t->rules != 0) { + rule_type &= t->rules; + } + flags = t->flags; + is_regex = t->flags & APOL_QUERY_REGEX; + bool_name = t->bool_name; + if (t->source != NULL && + (source_list = + apol_query_create_candidate_type_list(p, t->source, is_regex, + t->flags & APOL_QUERY_SOURCE_INDIRECT, + ((t->flags & (APOL_QUERY_SOURCE_TYPE | APOL_QUERY_SOURCE_ATTRIBUTE)) / + APOL_QUERY_SOURCE_TYPE))) == NULL) { + goto cleanup; + } + if ((t->flags & APOL_QUERY_SOURCE_AS_ANY) && t->source != NULL) { + default_list = target_list = source_list; + source_as_any = 1; + } else { + if (t->target != NULL && + (target_list = + apol_query_create_candidate_type_list(p, t->target, is_regex, + t->flags & APOL_QUERY_TARGET_INDIRECT, + ((t-> + flags & (APOL_QUERY_TARGET_TYPE | APOL_QUERY_TARGET_ATTRIBUTE)) + / APOL_QUERY_TARGET_TYPE))) == NULL) { + goto cleanup; + } + if (t->default_type != NULL && + (default_list = + apol_query_create_candidate_type_list(p, t->default_type, is_regex, 0, + APOL_QUERY_SYMBOL_IS_TYPE)) == NULL) { + goto cleanup; + } + } + if (t->classes != NULL && + apol_vector_get_size(t->classes) > 0 && + (class_list = apol_query_create_candidate_class_list(p, t->classes)) == NULL) { + goto cleanup; + } + } + + if ((*v = apol_vector_create(NULL)) == NULL) { + ERR(p, "%s", strerror(errno)); + goto cleanup; + } + + if (rule_select(p, *v, rule_type, flags, source_list, target_list, class_list, default_list, bool_name)) { + goto cleanup; + } + + retval = 0; + cleanup: + if (retval != 0) { + apol_vector_destroy(v); + } + apol_vector_destroy(&source_list); + if (!source_as_any) { + apol_vector_destroy(&target_list); + apol_vector_destroy(&default_list); + } + apol_vector_destroy(&class_list); + return retval; +} + +int apol_syn_terule_get_by_query(const apol_policy_t * p, const apol_terule_query_t * t, apol_vector_t ** v) +{ + apol_vector_t *source_list = NULL, *target_list = NULL, *class_list = NULL, *default_list = NULL, *syn_v = NULL; + int retval = -1, source_as_any = 0, is_regex = 0; + char *bool_name = NULL; + *v = NULL; + size_t i; + unsigned int flags = 0; + + if (!p || !qpol_policy_has_capability(apol_policy_get_qpol(p), QPOL_CAP_SYN_RULES)) { + ERR(p, "%s", strerror(EINVAL)); + goto cleanup; + } + + uint32_t rule_type = QPOL_RULE_TYPE_TRANS | QPOL_RULE_TYPE_MEMBER | QPOL_RULE_TYPE_CHANGE; + if (t != NULL) { + if (t->rules != 0) { + rule_type &= t->rules; + } + flags = t->flags; + is_regex = t->flags & APOL_QUERY_REGEX; + bool_name = t->bool_name; + if (t->source != NULL && + (source_list = + apol_query_create_candidate_syn_type_list(p, t->source, is_regex, + t->flags & APOL_QUERY_SOURCE_INDIRECT, + ((t->flags & (APOL_QUERY_SOURCE_TYPE | + APOL_QUERY_SOURCE_ATTRIBUTE)) / + APOL_QUERY_SOURCE_TYPE))) == NULL) { + goto cleanup; + } + if ((t->flags & APOL_QUERY_SOURCE_AS_ANY) && t->source != NULL) { + default_list = target_list = source_list; + source_as_any = 1; + } else { + if (t->target != NULL && + (target_list = + apol_query_create_candidate_syn_type_list(p, t->target, is_regex, + t->flags & APOL_QUERY_TARGET_INDIRECT, + ((t->flags & (APOL_QUERY_TARGET_TYPE | + APOL_QUERY_TARGET_ATTRIBUTE)) + / APOL_QUERY_TARGET_TYPE))) == NULL) { + goto cleanup; + } + if (t->default_type != NULL && + (default_list = + apol_query_create_candidate_type_list(p, t->default_type, is_regex, 0, + APOL_QUERY_SYMBOL_IS_TYPE)) == NULL) { + goto cleanup; + } + } + if (t->classes != NULL && + apol_vector_get_size(t->classes) > 0 && + (class_list = apol_query_create_candidate_class_list(p, t->classes)) == NULL) { + goto cleanup; + } + } + + if ((*v = apol_vector_create(NULL)) == NULL) { + ERR(p, "%s", strerror(errno)); + goto cleanup; + } + + if (rule_select(p, *v, rule_type, flags, source_list, target_list, class_list, default_list, bool_name)) { + goto cleanup; + } + + syn_v = apol_terule_list_to_syn_terules(p, *v); + if (!syn_v) { + goto cleanup; + } + apol_vector_destroy(v); + *v = syn_v; + syn_v = NULL; + + /* if source and target are indirect skip post filtering type sets */ + if ((t->flags & APOL_QUERY_SOURCE_INDIRECT) && (t->flags & (APOL_QUERY_TARGET_INDIRECT | APOL_QUERY_SOURCE_AS_ANY))) { + retval = 0; + goto cleanup; + } + /* if not searching by source, target, or default we are done */ + if (!source_list && !target_list && !default_list) { + retval = 0; + goto cleanup; + } + + if (source_list && !(t->flags & APOL_QUERY_SOURCE_INDIRECT)) { + apol_vector_destroy(&source_list); + source_list = + apol_query_create_candidate_type_list(p, t->source, is_regex, 0, + ((t->flags & (APOL_QUERY_SOURCE_TYPE | APOL_QUERY_SOURCE_ATTRIBUTE)) / + APOL_QUERY_SOURCE_TYPE)); + if (!source_list) + goto cleanup; + } + if (target_list && (source_as_any || !(t->flags & APOL_QUERY_TARGET_INDIRECT))) { + if (source_as_any) { + target_list = source_list; + } else { + apol_vector_destroy(&target_list); + target_list = + apol_query_create_candidate_type_list(p, t->target, is_regex, 0, + ((t->flags & (APOL_QUERY_SOURCE_TYPE | + APOL_QUERY_SOURCE_ATTRIBUTE)) / + APOL_QUERY_SOURCE_TYPE)); + if (!target_list) + goto cleanup; + } + } + if (source_as_any) { + default_list = source_list; + } + + for (i = 0; i < apol_vector_get_size(*v); i++) { + qpol_syn_terule_t *srule = apol_vector_get_element(*v, i); + const qpol_type_set_t *stypes = NULL, *ttypes = NULL; + const qpol_type_t *dflt = NULL; + size_t j; + int uses_source = 0, uses_target = 0, uses_default = 0; + qpol_syn_terule_get_source_type_set(p->p, srule, &stypes); + qpol_syn_terule_get_target_type_set(p->p, srule, &ttypes); + if (source_list && !(t->flags & APOL_QUERY_SOURCE_INDIRECT)) { + uses_source = apol_query_type_set_uses_types_directly(p, stypes, source_list); + if (uses_source < 0) + goto cleanup; + } else if (source_list && (t->flags & APOL_QUERY_SOURCE_INDIRECT)) { + uses_source = 1; + } else if (!source_list) { + uses_source = 1; + } + + if (target_list + && !(t->flags & APOL_QUERY_TARGET_INDIRECT || (source_as_any && t->flags & APOL_QUERY_SOURCE_INDIRECT))) { + uses_target = apol_query_type_set_uses_types_directly(p, ttypes, target_list); + if (uses_target < 0) + goto cleanup; + } else if (target_list + && (t->flags & APOL_QUERY_TARGET_INDIRECT || (source_as_any && t->flags & APOL_QUERY_SOURCE_INDIRECT))) { + uses_target = 1; + } else if (!target_list) { + uses_target = 1; + } + + if (default_list) { + qpol_syn_terule_get_default_type(p->p, srule, &dflt); + if (!apol_vector_get_index(default_list, (void *)dflt, NULL, NULL, &j)) + uses_default = 1; + } else if (!default_list) { + uses_default = 1; + } + + if (!((uses_source && uses_target && uses_default) + || (source_as_any && (uses_source || uses_target || uses_default)))) { + apol_vector_remove(*v, i); + i--; + } + } + + retval = 0; + cleanup: + if (retval != 0) { + apol_vector_destroy(v); + } + apol_vector_destroy(&syn_v); + apol_vector_destroy(&source_list); + if (!source_as_any) { + apol_vector_destroy(&target_list); + apol_vector_destroy(&default_list); + } + apol_vector_destroy(&class_list); + return retval; +} + +apol_terule_query_t *apol_terule_query_create(void) +{ + apol_terule_query_t *t = calloc(1, sizeof(apol_terule_query_t)); + if (t != NULL) { + t->rules = ~0U; + t->flags = + (APOL_QUERY_SOURCE_TYPE | APOL_QUERY_SOURCE_ATTRIBUTE | APOL_QUERY_TARGET_TYPE | + APOL_QUERY_TARGET_ATTRIBUTE); + } + return t; +} + +void apol_terule_query_destroy(apol_terule_query_t ** t) +{ + if (*t != NULL) { + free((*t)->source); + free((*t)->target); + free((*t)->default_type); + free((*t)->bool_name); + apol_vector_destroy(&(*t)->classes); + free(*t); + *t = NULL; + } +} + +int apol_terule_query_set_rules(const apol_policy_t * p __attribute__ ((unused)), apol_terule_query_t * t, unsigned int rules) +{ + if (rules != 0) { + t->rules = rules; + } else { + t->rules = ~0U; + } + return 0; +} + +int apol_terule_query_set_source(const apol_policy_t * p, apol_terule_query_t * t, const char *symbol, int is_indirect) +{ + apol_query_set_flag(p, &t->flags, is_indirect, APOL_QUERY_SOURCE_INDIRECT); + return apol_query_set(p, &t->source, NULL, symbol); +} + +int apol_terule_query_set_source_component(const apol_policy_t * p, apol_terule_query_t * t, unsigned int component) +{ + if (!t || !(component & APOL_QUERY_SYMBOL_IS_BOTH)) { + ERR(p, "%s", strerror(EINVAL)); + errno = EINVAL; + return -1; + } + apol_query_set_flag(p, &t->flags, component & APOL_QUERY_SYMBOL_IS_TYPE, APOL_QUERY_SOURCE_TYPE); + apol_query_set_flag(p, &t->flags, component & APOL_QUERY_SYMBOL_IS_ATTRIBUTE, APOL_QUERY_SOURCE_ATTRIBUTE); + return 0; +} + +int apol_terule_query_set_target(const apol_policy_t * p, apol_terule_query_t * t, const char *symbol, int is_indirect) +{ + apol_query_set_flag(p, &t->flags, is_indirect, APOL_QUERY_TARGET_INDIRECT); + return apol_query_set(p, &t->target, NULL, symbol); +} + +int apol_terule_query_set_target_component(const apol_policy_t * p, apol_terule_query_t * t, unsigned int component) +{ + if (!t || !(component & APOL_QUERY_SYMBOL_IS_BOTH)) { + ERR(p, "%s", strerror(EINVAL)); + errno = EINVAL; + return -1; + } + apol_query_set_flag(p, &t->flags, component & APOL_QUERY_SYMBOL_IS_TYPE, APOL_QUERY_TARGET_TYPE); + apol_query_set_flag(p, &t->flags, component & APOL_QUERY_SYMBOL_IS_ATTRIBUTE, APOL_QUERY_TARGET_ATTRIBUTE); + return 0; +} + +int apol_terule_query_set_default(const apol_policy_t * p, apol_terule_query_t * t, const char *symbol) +{ + return apol_query_set(p, &t->default_type, NULL, symbol); +} + +int apol_terule_query_append_class(const apol_policy_t * p, apol_terule_query_t * t, const char *obj_class) +{ + char *s = NULL; + if (obj_class == NULL) { + apol_vector_destroy(&t->classes); + } else if ((s = strdup(obj_class)) == NULL || (t->classes == NULL && (t->classes = apol_vector_create(free)) == NULL) + || apol_vector_append(t->classes, s) < 0) { + ERR(p, "%s", strerror(errno)); + free(s); + return -1; + } + return 0; +} + +int apol_terule_query_set_bool(const apol_policy_t * p, apol_terule_query_t * t, const char *bool_name) +{ + return apol_query_set(p, &t->bool_name, NULL, bool_name); +} + +int apol_terule_query_set_enabled(const apol_policy_t * p, apol_terule_query_t * t, int is_enabled) +{ + return apol_query_set_flag(p, &t->flags, is_enabled, APOL_QUERY_ONLY_ENABLED); +} + +int apol_terule_query_set_source_any(const apol_policy_t * p, apol_terule_query_t * t, int is_any) +{ + return apol_query_set_flag(p, &t->flags, is_any, APOL_QUERY_SOURCE_AS_ANY); +} + +int apol_terule_query_set_regex(const apol_policy_t * p, apol_terule_query_t * t, int is_regex) +{ + return apol_query_set_regex(p, &t->flags, is_regex); +} + +/** + * Comparison function for two syntactic terules. Will return -1 if + * a's line number is before b's, 1 if b is greater. + */ +static int apol_syn_terule_comp(const void *a, const void *b, void *data) +{ + qpol_syn_terule_t *r1 = (qpol_syn_terule_t *) a; + qpol_syn_terule_t *r2 = (qpol_syn_terule_t *) b; + apol_policy_t *p = (apol_policy_t *) data; + unsigned long num1, num2; + if (qpol_syn_terule_get_lineno(p->p, r1, &num1) < 0 || qpol_syn_terule_get_lineno(p->p, r2, &num2) < 0) { + return 0; + } + if (num1 != num2) { + return (int)num1 - (int)num2; + } + return (int)((char *)r1 - (char *)r2); +} + +apol_vector_t *apol_terule_to_syn_terules(const apol_policy_t * p, const qpol_terule_t * rule) +{ + apol_vector_t *v = NULL; + qpol_iterator_t *iter = NULL; + qpol_syn_terule_t *syn_terule; + int retval = -1, error = 0; + if (qpol_terule_get_syn_terule_iter(p->p, rule, &iter) < 0) { + error = errno; + goto cleanup; + } + if ((v = apol_vector_create(NULL)) == NULL) { + error = errno; + ERR(p, "%s", strerror(error)); + goto cleanup; + } + for (; !qpol_iterator_end(iter); qpol_iterator_next(iter)) { + if (qpol_iterator_get_item(iter, (void **)&syn_terule) < 0) { + error = errno; + ERR(p, "%s", strerror(error)); + goto cleanup; + } + if (apol_vector_append(v, syn_terule) < 0) { + error = errno; + ERR(p, "%s", strerror(error)); + goto cleanup; + } + } + apol_vector_sort_uniquify(v, apol_syn_terule_comp, (void *)p); + retval = 0; + cleanup: + qpol_iterator_destroy(&iter); + if (retval != 0) { + apol_vector_destroy(&v); + errno = error; + return NULL; + } + return v; +} + +apol_vector_t *apol_terule_list_to_syn_terules(const apol_policy_t * p, const apol_vector_t * rules) +{ + apol_bst_t *b = NULL; + qpol_terule_t *rule; + qpol_iterator_t *iter = NULL; + qpol_syn_terule_t *syn_terule; + apol_vector_t *v = NULL; + size_t i; + int retval = -1, error = 0; + + if ((b = apol_bst_create(apol_syn_terule_comp, NULL)) == NULL) { + error = errno; + ERR(p, "%s", strerror(error)); + goto cleanup; + } + for (i = 0; i < apol_vector_get_size(rules); i++) { + rule = apol_vector_get_element(rules, i); + if (qpol_terule_get_syn_terule_iter(p->p, rule, &iter) < 0) { + error = errno; + goto cleanup; + } + for (; !qpol_iterator_end(iter); qpol_iterator_next(iter)) { + if (qpol_iterator_get_item(iter, (void **)&syn_terule) < 0) { + error = errno; + ERR(p, "%s", strerror(error)); + goto cleanup; + } + if (apol_bst_insert(b, syn_terule, (void *)p) < 0) { + error = errno; + ERR(p, "%s", strerror(error)); + goto cleanup; + } + } + qpol_iterator_destroy(&iter); + } + if ((v = apol_bst_get_vector(b, 1)) == NULL) { + error = errno; + ERR(p, "%s", strerror(error)); + goto cleanup; + } + retval = 0; + cleanup: + apol_bst_destroy(&b); + qpol_iterator_destroy(&iter); + if (retval != 0) { + errno = error; + return NULL; + } + return v; +} + +char *apol_terule_render(const apol_policy_t * policy, const qpol_terule_t * rule) +{ + char *tmp = NULL; + const char *tmp_name = NULL; + const char *rule_type_str; + int error = 0; + size_t tmp_sz = 0; + uint32_t rule_type = 0; + const qpol_type_t *type = NULL; + const qpol_class_t *obj_class = NULL; + + if (!policy || !rule) { + ERR(policy, "%s", strerror(EINVAL)); + errno = EINVAL; + return NULL; + } + + /* rule type */ + if (qpol_terule_get_rule_type(policy->p, rule, &rule_type)) { + return NULL; + } + if (!(rule_type &= (QPOL_RULE_TYPE_TRANS | QPOL_RULE_TYPE_CHANGE | QPOL_RULE_TYPE_MEMBER))) { + ERR(policy, "%s", "Invalid TE rule type"); + errno = EINVAL; + return NULL; + } + if (!(rule_type_str = apol_rule_type_to_str(rule_type))) { + ERR(policy, "%s", "Could not get TE rule type's string"); + errno = EINVAL; + return NULL; + } + if (apol_str_appendf(&tmp, &tmp_sz, "%s ", rule_type_str)) { + error = errno; + ERR(policy, "%s", strerror(error)); + goto err; + } + + /* source type */ + if (qpol_terule_get_source_type(policy->p, rule, &type)) { + error = errno; + goto err; + } + if (qpol_type_get_name(policy->p, type, &tmp_name)) { + error = errno; + goto err; + } + if (apol_str_appendf(&tmp, &tmp_sz, "%s ", tmp_name)) { + error = errno; + ERR(policy, "%s", strerror(error)); + goto err; + } + + /* target type */ + if (qpol_terule_get_target_type(policy->p, rule, &type)) { + error = errno; + goto err; + } + if (qpol_type_get_name(policy->p, type, &tmp_name)) { + error = errno; + goto err; + } + if (apol_str_appendf(&tmp, &tmp_sz, "%s : ", tmp_name)) { + error = errno; + ERR(policy, "%s", strerror(error)); + goto err; + } + + /* object class */ + if (qpol_terule_get_object_class(policy->p, rule, &obj_class)) { + error = errno; + goto err; + } + if (qpol_class_get_name(policy->p, obj_class, &tmp_name)) { + error = errno; + goto err; + } + if (apol_str_appendf(&tmp, &tmp_sz, "%s ", tmp_name)) { + error = errno; + ERR(policy, "%s", strerror(error)); + goto err; + } + + /* default type */ + if (qpol_terule_get_default_type(policy->p, rule, &type)) { + error = errno; + goto err; + } + if (qpol_type_get_name(policy->p, type, &tmp_name)) { + error = errno; + goto err; + } + if (apol_str_appendf(&tmp, &tmp_sz, "%s;", tmp_name)) { + error = errno; + ERR(policy, "%s", strerror(error)); + goto err; + } + + return tmp; + + err: + free(tmp); + errno = error; + return NULL; +} + +char *apol_syn_terule_render(const apol_policy_t * policy, const qpol_syn_terule_t * rule) +{ + char *tmp = NULL; + const char *tmp_name = NULL; + const char *rule_type_str; + int error = 0; + uint32_t rule_type = 0, star = 0, comp = 0; + const qpol_type_t *type = NULL; + const qpol_class_t *obj_class = NULL; + qpol_iterator_t *iter = NULL, *iter2 = NULL; + size_t tmp_sz = 0, iter_sz = 0, iter2_sz = 0; + const qpol_type_set_t *set = NULL; + + if (!policy || !rule) { + ERR(policy, "%s", strerror(EINVAL)); + errno = EINVAL; + return NULL; + } + + /* rule type */ + if (qpol_syn_terule_get_rule_type(policy->p, rule, &rule_type)) { + return NULL; + } + if (!(rule_type &= (QPOL_RULE_TYPE_TRANS | QPOL_RULE_TYPE_CHANGE | QPOL_RULE_TYPE_MEMBER))) { + ERR(policy, "%s", "Invalid TE rule type"); + errno = EINVAL; + return NULL; + } + if (!(rule_type_str = apol_rule_type_to_str(rule_type))) { + ERR(policy, "%s", "Could not get TE rule type's string"); + errno = EINVAL; + return NULL; + } + if (apol_str_appendf(&tmp, &tmp_sz, "%s ", rule_type_str)) { + error = errno; + ERR(policy, "%s", strerror(error)); + goto err; + } + + /* source type set */ + if (qpol_syn_terule_get_source_type_set(policy->p, rule, &set)) { + error = errno; + goto err; + } + if (qpol_type_set_get_is_star(policy->p, set, &star)) { + error = errno; + goto err; + } + if (star) { + if (apol_str_append(&tmp, &tmp_sz, "* ")) { + error = errno; + ERR(policy, "%s", strerror(error)); + goto err; + } + } else { + if (qpol_type_set_get_is_comp(policy->p, set, &comp)) { + error = errno; + goto err; + } + if (comp) { + if (apol_str_append(&tmp, &tmp_sz, "~")) { + error = errno; + ERR(policy, "%s", strerror(error)); + goto err; + } + } + if (qpol_type_set_get_included_types_iter(policy->p, set, &iter)) { + error = errno; + goto err; + } + if (qpol_type_set_get_subtracted_types_iter(policy->p, set, &iter2)) { + error = errno; + goto err; + } + if (qpol_iterator_get_size(iter, &iter_sz) || qpol_iterator_get_size(iter2, &iter2_sz)) { + error = errno; + ERR(policy, "%s", strerror(error)); + goto err; + } + if (iter_sz + iter2_sz > 1) { + if (apol_str_append(&tmp, &tmp_sz, "{ ")) { + error = errno; + ERR(policy, "%s", strerror(error)); + goto err; + } + } + for (; !qpol_iterator_end(iter); qpol_iterator_next(iter)) { + if (qpol_iterator_get_item(iter, (void **)&type)) { + error = errno; + ERR(policy, "%s", strerror(error)); + goto err; + } + if (qpol_type_get_name(policy->p, type, &tmp_name)) { + error = errno; + goto err; + } + if (apol_str_appendf(&tmp, &tmp_sz, "%s ", tmp_name)) { + error = errno; + ERR(policy, "%s", strerror(error)); + goto err; + } + } + for (; !qpol_iterator_end(iter2); qpol_iterator_next(iter2)) { + if (qpol_iterator_get_item(iter2, (void **)&type)) { + error = errno; + ERR(policy, "%s", strerror(error)); + goto err; + } + if (qpol_type_get_name(policy->p, type, &tmp_name)) { + error = errno; + goto err; + } + if (apol_str_appendf(&tmp, &tmp_sz, "-%s ", tmp_name)) { + error = errno; + ERR(policy, "%s", strerror(error)); + goto err; + } + } + qpol_iterator_destroy(&iter); + qpol_iterator_destroy(&iter2); + if (iter_sz + iter2_sz > 1) { + if (apol_str_append(&tmp, &tmp_sz, "} ")) { + error = errno; + ERR(policy, "%s", strerror(error)); + goto err; + } + } + } + + /* target type set */ + if (qpol_syn_terule_get_target_type_set(policy->p, rule, &set)) { + error = errno; + goto err; + } + if (qpol_type_set_get_is_star(policy->p, set, &star)) { + error = errno; + goto err; + } + if (star) { + if (apol_str_append(&tmp, &tmp_sz, "* ")) { + error = errno; + ERR(policy, "%s", strerror(error)); + goto err; + } + } else { + if (qpol_type_set_get_is_comp(policy->p, set, &comp)) { + error = errno; + goto err; + } + if (comp) { + if (apol_str_append(&tmp, &tmp_sz, "~")) { + error = errno; + ERR(policy, "%s", strerror(error)); + goto err; + } + } + if (qpol_type_set_get_included_types_iter(policy->p, set, &iter)) { + error = errno; + goto err; + } + if (qpol_type_set_get_subtracted_types_iter(policy->p, set, &iter2)) { + error = errno; + goto err; + } + if (qpol_iterator_get_size(iter, &iter_sz) || qpol_iterator_get_size(iter2, &iter2_sz)) { + error = errno; + ERR(policy, "%s", strerror(error)); + goto err; + } + if (iter_sz + iter2_sz > 1) { + if (apol_str_append(&tmp, &tmp_sz, "{ ")) { + error = errno; + ERR(policy, "%s", strerror(error)); + goto err; + } + } + for (; !qpol_iterator_end(iter); qpol_iterator_next(iter)) { + if (qpol_iterator_get_item(iter, (void **)&type)) { + error = errno; + ERR(policy, "%s", strerror(error)); + goto err; + } + if (qpol_type_get_name(policy->p, type, &tmp_name)) { + error = errno; + goto err; + } + if (apol_str_appendf(&tmp, &tmp_sz, "%s ", tmp_name)) { + error = errno; + ERR(policy, "%s", strerror(error)); + goto err; + } + } + for (; !qpol_iterator_end(iter2); qpol_iterator_next(iter2)) { + if (qpol_iterator_get_item(iter2, (void **)&type)) { + error = errno; + ERR(policy, "%s", strerror(error)); + goto err; + } + if (qpol_type_get_name(policy->p, type, &tmp_name)) { + error = errno; + goto err; + } + if (apol_str_appendf(&tmp, &tmp_sz, "-%s ", tmp_name)) { + error = errno; + ERR(policy, "%s", strerror(error)); + goto err; + } + } + qpol_iterator_destroy(&iter); + qpol_iterator_destroy(&iter2); + if (iter_sz + iter2_sz > 1) { + if (apol_str_append(&tmp, &tmp_sz, "} ")) { + error = errno; + ERR(policy, "%s", strerror(error)); + goto err; + } + } + } + + if (apol_str_append(&tmp, &tmp_sz, ": ")) { + error = errno; + ERR(policy, "%s", strerror(error)); + goto err; + } + + /* object classes */ + if (qpol_syn_terule_get_class_iter(policy->p, rule, &iter)) { + error = errno; + goto err; + } + if (qpol_iterator_get_size(iter, &iter_sz)) { + error = errno; + ERR(policy, "%s", strerror(error)); + goto err; + } + if (iter_sz > 1) { + if (apol_str_append(&tmp, &tmp_sz, "{ ")) { + error = errno; + ERR(policy, "%s", strerror(error)); + goto err; + } + } + for (; !qpol_iterator_end(iter); qpol_iterator_next(iter)) { + if (qpol_iterator_get_item(iter, (void **)&obj_class)) { + error = errno; + ERR(policy, "%s", strerror(error)); + goto err; + } + if (qpol_class_get_name(policy->p, obj_class, &tmp_name)) { + error = errno; + goto err; + } + if (apol_str_appendf(&tmp, &tmp_sz, "%s ", tmp_name)) { + error = errno; + ERR(policy, "%s", strerror(error)); + goto err; + } + } + qpol_iterator_destroy(&iter); + if (iter_sz > 1) { + if (apol_str_append(&tmp, &tmp_sz, "} ")) { + error = errno; + ERR(policy, "%s", strerror(error)); + goto err; + } + } + + /* default type */ + if (qpol_syn_terule_get_default_type(policy->p, rule, &type)) { + error = errno; + goto err; + } + if (qpol_type_get_name(policy->p, type, &tmp_name)) { + error = errno; + goto err; + } + if (apol_str_appendf(&tmp, &tmp_sz, "%s;", tmp_name)) { + error = errno; + ERR(policy, "%s", strerror(error)); + goto err; + } + + return tmp; + + err: + free(tmp); + qpol_iterator_destroy(&iter); + qpol_iterator_destroy(&iter2); + errno = error; + return NULL; +} |