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block: sed-opal: keystore access for SED Opal keys

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Allow for permanent SED authentication keys by
reading/writing to the SED Opal non-volatile keystore.

Signed-off-by: Greg Joyce <gjoyce@linux.vnet.ibm.com>
Reviewed-by: Jonathan Derrick <jonathan.derrick@linux.dev>
Link: https://lore.kernel.org/r/20231004201957.1451669-3-gjoyce@linux.vnet.ibm.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Greg Joyce 2023-10-04 15:19:56 -05:00 committed by Jens Axboe
parent 96ff37ceb2
commit 5dd339722f
1 changed files with 16 additions and 2 deletions
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18
block/sed-opal.c
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@ -18,6 +18,7 @@
#include <linux/uaccess.h>
#include <uapi/linux/sed-opal.h>
#include <linux/sed-opal.h>
#include <linux/sed-opal-key.h>
#include <linux/string.h>
#include <linux/kdev_t.h>
#include <linux/key.h>
@ -3019,7 +3020,13 @@ static int opal_set_new_pw(struct opal_dev *dev, struct opal_new_pw *opal_pw)
if (ret)
return ret;
/* update keyring with new password */
/* update keyring and key store with new password */
ret = sed_write_key(OPAL_AUTH_KEY,
opal_pw->new_user_pw.opal_key.key,
opal_pw->new_user_pw.opal_key.key_len);
if (ret != -EOPNOTSUPP)
pr_warn("error updating SED key: %d\n", ret);
ret = update_sed_opal_key(OPAL_AUTH_KEY,
opal_pw->new_user_pw.opal_key.key,
opal_pw->new_user_pw.opal_key.key_len);
@ -3292,6 +3299,8 @@ EXPORT_SYMBOL_GPL(sed_ioctl);
static int __init sed_opal_init(void)
{
struct key *kr;
char init_sed_key[OPAL_KEY_MAX];
int keylen = OPAL_KEY_MAX - 1;
kr = keyring_alloc(".sed_opal",
GLOBAL_ROOT_UID, GLOBAL_ROOT_GID, current_cred(),
@ -3304,6 +3313,11 @@ static int __init sed_opal_init(void)
sed_opal_keyring = kr;
return 0;
if (sed_read_key(OPAL_AUTH_KEY, init_sed_key, &keylen) < 0) {
memset(init_sed_key, '\0', sizeof(init_sed_key));
keylen = OPAL_KEY_MAX - 1;
}
return update_sed_opal_key(OPAL_AUTH_KEY, init_sed_key, keylen);
}
late_initcall(sed_opal_init);