#include <string.h>
#include <sys/param.h>
#include <sys/ucred.h>
#include <sys/malloc.h>
#include <sys/sbuf.h>
#include <sys/vnode.h>
#include <sys/proc.h>
#include <sys/proc_internal.h>
#include <sys/kauth.h>
#include <sys/imgact.h>
#include <mach/mach_types.h>
#include <kern/task.h>
#include <security/mac_internal.h>
#include <security/mac_mach_internal.h>
#include <bsd/security/audit/audit.h>
struct label *
mac_cred_label_alloc(void)
{
struct label *label;
label = mac_labelzone_alloc(MAC_WAITOK);
if (label == NULL)
return (NULL);
MAC_PERFORM(cred_label_init, label);
return (label);
}
void
mac_cred_label_init(struct ucred *cred)
{
cred->cr_label = mac_cred_label_alloc();
}
void
mac_cred_label_free(struct label *label)
{
MAC_PERFORM(cred_label_destroy, label);
mac_labelzone_free(label);
}
int
mac_cred_label_compare(struct label *a, struct label *b)
{
return (bcmp(a, b, sizeof (*a)) == 0);
}
int
mac_cred_label_externalize_audit(struct proc *p, struct mac *mac)
{
kauth_cred_t cr;
int error;
cr = kauth_cred_proc_ref(p);
error = MAC_EXTERNALIZE_AUDIT(cred, cr->cr_label,
mac->m_string, mac->m_buflen);
kauth_cred_unref(&cr);
return (error);
}
void
mac_cred_label_destroy(kauth_cred_t cred)
{
mac_cred_label_free(cred->cr_label);
cred->cr_label = NULL;
}
int
mac_cred_label_externalize(struct label *label, char *elements,
char *outbuf, size_t outbuflen, int flags __unused)
{
int error = 0;
error = MAC_EXTERNALIZE(cred, label, elements, outbuf, outbuflen);
return (error);
}
int
mac_cred_label_internalize(struct label *label, char *string)
{
int error;
error = MAC_INTERNALIZE(cred, label, string);
return (error);
}
void
mac_cred_label_associate_fork(kauth_cred_t cred, proc_t proc)
{
MAC_PERFORM(cred_label_associate_fork, cred, proc);
}
void
mac_cred_label_associate_kernel(kauth_cred_t cred)
{
MAC_PERFORM(cred_label_associate_kernel, cred);
}
void
mac_cred_label_associate_user(kauth_cred_t cred)
{
MAC_PERFORM(cred_label_associate_user, cred);
}
void
mac_cred_label_associate(struct ucred *parent_cred, struct ucred *child_cred)
{
MAC_PERFORM(cred_label_associate, parent_cred, child_cred);
}
int
mac_execve_enter(user_addr_t mac_p, struct image_params *imgp)
{
struct user_mac mac;
struct label *execlabel;
char *buffer;
int error;
size_t ulen;
if (mac_p == USER_ADDR_NULL)
return (0);
if (IS_64BIT_PROCESS(current_proc())) {
struct user64_mac mac64;
error = copyin(mac_p, &mac64, sizeof(mac64));
mac.m_buflen = mac64.m_buflen;
mac.m_string = mac64.m_string;
} else {
struct user32_mac mac32;
error = copyin(mac_p, &mac32, sizeof(mac32));
mac.m_buflen = mac32.m_buflen;
mac.m_string = mac32.m_string;
}
if (error)
return (error);
error = mac_check_structmac_consistent(&mac);
if (error)
return (error);
execlabel = mac_cred_label_alloc();
MALLOC(buffer, char *, mac.m_buflen, M_MACTEMP, M_WAITOK);
error = copyinstr(CAST_USER_ADDR_T(mac.m_string), buffer, mac.m_buflen, &ulen);
if (error)
goto out;
AUDIT_ARG(mac_string, buffer);
error = mac_cred_label_internalize(execlabel, buffer);
out:
if (error) {
mac_cred_label_free(execlabel);
execlabel = NULL;
}
imgp->ip_execlabelp = execlabel;
FREE(buffer, M_MACTEMP);
return (error);
}
void
mac_cred_label_update(kauth_cred_t cred, struct label *newlabel)
{
posix_cred_t pcred = posix_cred_get(cred);
pcred->cr_flags |= CRF_MAC_ENFORCE;
MAC_PERFORM(cred_label_update, cred, newlabel);
}
int
mac_cred_check_label_update(kauth_cred_t cred, struct label *newlabel)
{
int error;
#if SECURITY_MAC_CHECK_ENFORCE
if (!mac_proc_enforce)
return 0;
#endif
MAC_CHECK(cred_check_label_update, cred, newlabel);
return (error);
}
int
mac_cred_check_visible(kauth_cred_t u1, kauth_cred_t u2)
{
int error;
#if SECURITY_MAC_CHECK_ENFORCE
if (!mac_proc_enforce)
return 0;
#endif
MAC_CHECK(cred_check_visible, u1, u2);
return (error);
}
int
mac_proc_check_debug(proc_t curp, struct proc *proc)
{
kauth_cred_t cred;
int error;
#if SECURITY_MAC_CHECK_ENFORCE
if (!mac_proc_enforce)
return 0;
#endif
if (!mac_proc_check_enforce(curp))
return 0;
cred = kauth_cred_proc_ref(curp);
MAC_CHECK(proc_check_debug, cred, proc);
kauth_cred_unref(&cred);
return (error);
}
int
mac_proc_check_fork(proc_t curp)
{
kauth_cred_t cred;
int error;
#if SECURITY_MAC_CHECK_ENFORCE
if (!mac_proc_enforce)
return 0;
#endif
if (!mac_proc_check_enforce(curp))
return 0;
cred = kauth_cred_proc_ref(curp);
MAC_CHECK(proc_check_fork, cred, curp);
kauth_cred_unref(&cred);
return (error);
}
int
mac_proc_check_get_task_name(struct ucred *cred, struct proc *p)
{
int error;
MAC_CHECK(proc_check_get_task_name, cred, p);
return (error);
}
int
mac_proc_check_get_task(struct ucred *cred, struct proc *p)
{
int error;
MAC_CHECK(proc_check_get_task, cred, p);
return (error);
}
int
mac_proc_check_expose_task(struct ucred *cred, struct proc *p)
{
int error;
MAC_CHECK(proc_check_expose_task, cred, p);
return (error);
}
int
mac_proc_check_inherit_ipc_ports(struct proc *p, struct vnode *cur_vp, off_t cur_offset, struct vnode *img_vp, off_t img_offset, struct vnode *scriptvp)
{
int error;
MAC_CHECK(proc_check_inherit_ipc_ports, p, cur_vp, cur_offset, img_vp, img_offset, scriptvp);
return (error);
}
int
mac_proc_check_map_anon(proc_t proc, user_addr_t u_addr,
user_size_t u_size, int prot, int flags, int *maxprot)
{
kauth_cred_t cred;
int error;
#if SECURITY_MAC_CHECK_ENFORCE
if (!mac_vm_enforce)
return 0;
#endif
if (!mac_proc_check_enforce(proc))
return (0);
cred = kauth_cred_proc_ref(proc);
MAC_CHECK(proc_check_map_anon, proc, cred, u_addr, u_size, prot, flags, maxprot);
kauth_cred_unref(&cred);
return (error);
}
int
mac_proc_check_mprotect(proc_t proc,
user_addr_t addr, user_size_t size, int prot)
{
kauth_cred_t cred;
int error;
#if SECURITY_MAC_CHECK_ENFORCE
if (!mac_vm_enforce)
return 0;
#endif
if (!mac_proc_check_enforce(proc))
return (0);
cred = kauth_cred_proc_ref(proc);
MAC_CHECK(proc_check_mprotect, cred, proc, addr, size, prot);
kauth_cred_unref(&cred);
return (error);
}
int
mac_proc_check_run_cs_invalid(proc_t proc)
{
int error;
#if SECURITY_MAC_CHECK_ENFORCE
if (!mac_vm_enforce)
return 0;
#endif
MAC_CHECK(proc_check_run_cs_invalid, proc);
return (error);
}
int
mac_proc_check_sched(proc_t curp, struct proc *proc)
{
kauth_cred_t cred;
int error;
#if SECURITY_MAC_CHECK_ENFORCE
if (!mac_proc_enforce)
return 0;
#endif
if (!mac_proc_check_enforce(curp))
return 0;
cred = kauth_cred_proc_ref(curp);
MAC_CHECK(proc_check_sched, cred, proc);
kauth_cred_unref(&cred);
return (error);
}
int
mac_proc_check_signal(proc_t curp, struct proc *proc, int signum)
{
kauth_cred_t cred;
int error;
#if SECURITY_MAC_CHECK_ENFORCE
if (!mac_proc_enforce)
return 0;
#endif
if (!mac_proc_check_enforce(curp))
return 0;
cred = kauth_cred_proc_ref(curp);
MAC_CHECK(proc_check_signal, cred, proc, signum);
kauth_cred_unref(&cred);
return (error);
}
int
mac_proc_check_wait(proc_t curp, struct proc *proc)
{
kauth_cred_t cred;
int error;
#if SECURITY_MAC_CHECK_ENFORCE
if (!mac_proc_enforce)
return 0;
#endif
if (!mac_proc_check_enforce(curp))
return 0;
cred = kauth_cred_proc_ref(curp);
MAC_CHECK(proc_check_wait, cred, proc);
kauth_cred_unref(&cred);
return (error);
}
void
mac_proc_notify_exit(struct proc *proc)
{
MAC_PERFORM(proc_notify_exit, proc);
}
int
mac_proc_check_suspend_resume(proc_t curp, int sr)
{
kauth_cred_t cred;
int error;
#if SECURITY_MAC_CHECK_ENFORCE
if (!mac_proc_enforce)
return 0;
#endif
if (!mac_proc_check_enforce(curp))
return 0;
cred = kauth_cred_proc_ref(curp);
MAC_CHECK(proc_check_suspend_resume, cred, curp, sr);
kauth_cred_unref(&cred);
return (error);
}
int
mac_proc_check_ledger(proc_t curp, proc_t proc, int ledger_op)
{
kauth_cred_t cred;
int error = 0;
#if SECURITY_MAC_CHECK_ENFORCE
if (!mac_proc_enforce)
return 0;
#endif
if (!mac_proc_check_enforce(curp))
return 0;
cred = kauth_cred_proc_ref(curp);
MAC_CHECK(proc_check_ledger, cred, proc, ledger_op);
kauth_cred_unref(&cred);
return (error);
}
int
mac_proc_check_proc_info(proc_t curp, proc_t target, int callnum, int flavor)
{
kauth_cred_t cred;
int error = 0;
#if SECURITY_MAC_CHECK_ENFORCE
if (!mac_proc_enforce)
return 0;
#endif
if (!mac_proc_check_enforce(curp))
return 0;
cred = kauth_cred_proc_ref(curp);
MAC_CHECK(proc_check_proc_info, cred, target, callnum, flavor);
kauth_cred_unref(&cred);
return (error);
}
int
mac_proc_check_get_cs_info(proc_t curp, proc_t target, unsigned int op)
{
kauth_cred_t cred;
int error = 0;
#if SECURITY_MAC_CHECK_ENFORCE
if (!mac_proc_enforce)
return 0;
#endif
if (!mac_proc_check_enforce(curp))
return 0;
cred = kauth_cred_proc_ref(curp);
MAC_CHECK(proc_check_get_cs_info, cred, target, op);
kauth_cred_unref(&cred);
return (error);
}
int
mac_proc_check_set_cs_info(proc_t curp, proc_t target, unsigned int op)
{
kauth_cred_t cred;
int error = 0;
#if SECURITY_MAC_CHECK_ENFORCE
if (!mac_proc_enforce)
return 0;
#endif
if (!mac_proc_check_enforce(curp))
return 0;
cred = kauth_cred_proc_ref(curp);
MAC_CHECK(proc_check_set_cs_info, cred, target, op);
kauth_cred_unref(&cred);
return (error);
}