110 lines
2.0 KiB
C
110 lines
2.0 KiB
C
#include "selinux.h"
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#include "objsec.h"
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#include "linux/version.h"
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#include "../klog.h" // IWYU pragma: keep
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#ifndef KSU_COMPAT_USE_SELINUX_STATE
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#include "avc.h"
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#endif
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#define KERNEL_SU_DOMAIN "u:r:su:s0"
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static u32 ksu_sid;
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static int transive_to_domain(const char *domain)
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{
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struct cred *cred;
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struct task_security_struct *tsec;
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u32 sid;
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int error;
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cred = (struct cred *)__task_cred(current);
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tsec = cred->security;
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if (!tsec) {
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pr_err("tsec == NULL!\n");
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return -1;
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}
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error = security_secctx_to_secid(domain, strlen(domain), &sid);
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if (error) {
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pr_info("security_secctx_to_secid %s -> sid: %d, error: %d\n", domain, sid, error);
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}
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if (!error) {
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if (!ksu_sid)
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ksu_sid = sid;
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tsec->sid = sid;
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tsec->create_sid = 0;
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tsec->keycreate_sid = 0;
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tsec->sockcreate_sid = 0;
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}
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return error;
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}
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void setup_selinux(const char *domain)
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{
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if (transive_to_domain(domain)) {
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pr_err("transive domain failed.");
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return;
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}
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/* we didn't need this now, we have change selinux rules when boot!
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if (!is_domain_permissive) {
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if (set_domain_permissive() == 0) {
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is_domain_permissive = true;
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}
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}*/
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}
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void setenforce(bool enforce)
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{
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#ifdef CONFIG_SECURITY_SELINUX_DEVELOP
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#ifdef KSU_COMPAT_USE_SELINUX_STATE
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selinux_state.enforcing = enforce;
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#else
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selinux_enforcing = enforce;
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#endif
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#endif
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}
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bool getenforce()
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{
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#ifdef CONFIG_SECURITY_SELINUX_DISABLE
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#ifdef KSU_COMPAT_USE_SELINUX_STATE
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if (selinux_state.disabled) {
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#else
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if (selinux_disabled) {
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#endif
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return false;
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}
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#endif
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#ifdef CONFIG_SECURITY_SELINUX_DEVELOP
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#ifdef KSU_COMPAT_USE_SELINUX_STATE
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return selinux_state.enforcing;
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#else
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return selinux_enforcing;
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#endif
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#else
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return true;
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#endif
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}
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#if (LINUX_VERSION_CODE < KERNEL_VERSION(5, 10, 0)) && \
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!defined(KSU_COMPAT_HAS_CURRENT_SID)
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/*
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* get the subjective security ID of the current task
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*/
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static inline u32 current_sid(void)
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{
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const struct task_security_struct *tsec = current_security();
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return tsec->sid;
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}
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#endif
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bool is_ksu_domain()
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{
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return ksu_sid && current_sid() == ksu_sid;
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}
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