1 // SPDX-License-Identifier: GPL-2.0
2 
3 /*
4  * Copyright 2020 Google LLC.
5  */
6 
7 #include "vmlinux.h"
8 #include <errno.h>
9 #include <bpf/bpf_helpers.h>
10 #include <bpf/bpf_tracing.h>
11 
12 long ima_hash_ret = -1;
13 u64 ima_hash = 0;
14 u32 monitored_pid = 0;
15 
16 char _license[] SEC("license") = "GPL";
17 
18 SEC("lsm.s/bprm_committed_creds")
19 int BPF_PROG(ima, struct linux_binprm *bprm)
20 {
21 	u32 pid = bpf_get_current_pid_tgid() >> 32;
22 
23 	if (pid == monitored_pid)
24 		ima_hash_ret = bpf_ima_inode_hash(bprm->file->f_inode,
25 						  &ima_hash, sizeof(ima_hash));
26 
27 	return 0;
28 }
29