59 lines
1.3 KiB
C
59 lines
1.3 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
|
|
|
|
#include <linux/kernel.h>
|
|
#include <linux/key.h>
|
|
#include <keys/asymmetric-type.h>
|
|
|
|
int x509_load_certificate_list(const u8 cert_list[],
|
|
const unsigned long list_size,
|
|
const struct key *keyring)
|
|
{
|
|
key_ref_t key;
|
|
const u8 *p, *end;
|
|
size_t plen;
|
|
|
|
p = cert_list;
|
|
end = p + list_size;
|
|
while (p < end) {
|
|
/* Each cert begins with an ASN.1 SEQUENCE tag and must be more
|
|
* than 256 bytes in size.
|
|
*/
|
|
if (end - p < 4)
|
|
goto dodgy_cert;
|
|
if (p[0] != 0x30 &&
|
|
p[1] != 0x82)
|
|
goto dodgy_cert;
|
|
plen = (p[2] << 8) | p[3];
|
|
plen += 4;
|
|
if (plen > end - p)
|
|
goto dodgy_cert;
|
|
|
|
key = key_create_or_update(make_key_ref(keyring, 1),
|
|
"asymmetric",
|
|
NULL,
|
|
p,
|
|
plen,
|
|
((KEY_POS_ALL & ~KEY_POS_SETATTR) |
|
|
KEY_USR_VIEW | KEY_USR_READ),
|
|
KEY_ALLOC_NOT_IN_QUOTA |
|
|
KEY_ALLOC_BUILT_IN |
|
|
KEY_ALLOC_BYPASS_RESTRICTION);
|
|
if (IS_ERR(key)) {
|
|
pr_err("Problem loading in-kernel X.509 certificate (%ld)\n",
|
|
PTR_ERR(key));
|
|
} else {
|
|
pr_notice("Loaded X.509 cert '%s'\n",
|
|
key_ref_to_ptr(key)->description);
|
|
key_ref_put(key);
|
|
}
|
|
p += plen;
|
|
}
|
|
|
|
return 0;
|
|
|
|
dodgy_cert:
|
|
pr_err("Problem parsing in-kernel X.509 certificate list\n");
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL_GPL(x509_load_certificate_list);
|