void set_sec_ctx(uid_t uid, gid_t gid, int ngroups, gid_t *groups, const struct security_token *token)
{
struct sec_ctx *ctx_p = &sec_ctx_stack[sec_ctx_stack_ndx];
/* Set the security context */
DEBUG(4, ("setting sec ctx (%u, %u) - sec_ctx_stack_ndx = %d\n",
(unsigned int)uid, (unsigned int)gid, sec_ctx_stack_ndx));
security_token_debug(DBGC_CLASS, 5, token);
debug_unix_user_token(DBGC_CLASS, 5, uid, gid, ngroups, groups);
/* Change uid, gid and supplementary group list. */
set_unix_security_ctx(uid, gid, ngroups, groups);
ctx_p->ut.ngroups = ngroups;
SAFE_FREE(ctx_p->ut.groups);
if (token && (token == ctx_p->token)) {
smb_panic("DUPLICATE_TOKEN");
}
TALLOC_FREE(ctx_p->token);
if (ngroups) {
ctx_p->ut.groups = (gid_t *)memdup(groups,
sizeof(gid_t) * ngroups);
if (!ctx_p->ut.groups) {
smb_panic("memdup failed");
}
} else {
ctx_p->ut.groups = NULL;
}
if (token) {
ctx_p->token = dup_nt_token(NULL, token);
if (!ctx_p->token) {
smb_panic("dup_nt_token failed");
}
} else {
ctx_p->token = NULL;
}
ctx_p->ut.uid = uid;
ctx_p->ut.gid = gid;
/* Update current_user stuff */
current_user.ut.uid = uid;
current_user.ut.gid = gid;
current_user.ut.ngroups = ngroups;
current_user.ut.groups = groups;
current_user.nt_user_token = ctx_p->token;
}
bool pop_sec_ctx(void)
{
struct sec_ctx *ctx_p;
struct sec_ctx *prev_ctx_p;
/* Check for stack underflow */
if (sec_ctx_stack_ndx == 0) {
DEBUG(0, ("Security context stack underflow!\n"));
smb_panic("Security context stack underflow!");
}
ctx_p = &sec_ctx_stack[sec_ctx_stack_ndx];
/* Clear previous user info */
ctx_p->ut.uid = (uid_t)-1;
ctx_p->ut.gid = (gid_t)-1;
SAFE_FREE(ctx_p->ut.groups);
ctx_p->ut.ngroups = 0;
TALLOC_FREE(ctx_p->token);
/* Pop back previous user */
sec_ctx_stack_ndx--;
prev_ctx_p = &sec_ctx_stack[sec_ctx_stack_ndx];
/* Change uid, gid and supplementary group list. */
set_unix_security_ctx(prev_ctx_p->ut.uid,
prev_ctx_p->ut.gid,
prev_ctx_p->ut.ngroups,
prev_ctx_p->ut.groups);
/* Update current_user stuff */
current_user.ut.uid = prev_ctx_p->ut.uid;
current_user.ut.gid = prev_ctx_p->ut.gid;
current_user.ut.ngroups = prev_ctx_p->ut.ngroups;
current_user.ut.groups = prev_ctx_p->ut.groups;
current_user.nt_user_token = prev_ctx_p->token;
DEBUG(4, ("pop_sec_ctx (%u, %u) - sec_ctx_stack_ndx = %d\n",
(unsigned int)geteuid(), (unsigned int)getegid(), sec_ctx_stack_ndx));
return True;
}