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acpi/nfit, libnvdimm/security: add Intel DSM 1.8 master passphrase support

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With Intel DSM 1.8 [1] two new security DSMs are introduced. Enable/update
master passphrase and master secure erase. The master passphrase allows
a secure erase to be performed without the user passphrase that is set on
the NVDIMM. The commands of master_update and master_erase are added to
the sysfs knob in order to initiate the DSMs. They are similar in opeartion
mechanism compare to update and erase.

[1]: http://pmem.io/documents/NVDIMM_DSM_Interface-V1.8.pdf

Signed-off-by: Dave Jiang <dave.jiang@intel.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
This commit is contained in:
Dave Jiang 2018-12-10 10:53:22 -07:00 committed by Dan Williams
parent 7d988097c5
commit 89fa9d8ea7
6 changed files with 118 additions and 49 deletions
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2
drivers/acpi/nfit/core.c
View File

@ -389,6 +389,8 @@ static u8 nfit_dsm_revid(unsigned family, unsigned func)
[NVDIMM_INTEL_SECURE_ERASE] = 2,
[NVDIMM_INTEL_OVERWRITE] = 2,
[NVDIMM_INTEL_QUERY_OVERWRITE] = 2,
[NVDIMM_INTEL_SET_MASTER_PASSPHRASE] = 2,
[NVDIMM_INTEL_MASTER_SECURE_ERASE] = 2,
},
};
u8 id;

39
drivers/acpi/nfit/intel.c
View File

@ -7,7 +7,8 @@
#include "intel.h"
#include "nfit.h"
static enum nvdimm_security_state intel_security_state(struct nvdimm *nvdimm)
static enum nvdimm_security_state intel_security_state(struct nvdimm *nvdimm,
enum nvdimm_passphrase_type ptype)
{
struct nfit_mem *nfit_mem = nvdimm_provider_data(nvdimm);
struct {
@ -33,7 +34,7 @@ static enum nvdimm_security_state intel_security_state(struct nvdimm *nvdimm)
* The DSM spec states that the security state is indeterminate
* until the overwrite DSM completes.
*/
if (nvdimm_in_overwrite(nvdimm))
if (nvdimm_in_overwrite(nvdimm) && ptype == NVDIMM_USER)
return NVDIMM_SECURITY_OVERWRITE;
rc = nvdimm_ctl(nvdimm, ND_CMD_CALL, &nd_cmd, sizeof(nd_cmd), NULL);
@ -43,17 +44,28 @@ static enum nvdimm_security_state intel_security_state(struct nvdimm *nvdimm)
return -EIO;
/* check and see if security is enabled and locked */
if (ptype == NVDIMM_MASTER) {
if (nd_cmd.cmd.extended_state & ND_INTEL_SEC_ESTATE_ENABLED)
return NVDIMM_SECURITY_UNLOCKED;
else if (nd_cmd.cmd.extended_state &
ND_INTEL_SEC_ESTATE_PLIMIT)
return NVDIMM_SECURITY_FROZEN;
} else {
if (nd_cmd.cmd.state & ND_INTEL_SEC_STATE_UNSUPPORTED)
return -ENXIO;
else if (nd_cmd.cmd.state & ND_INTEL_SEC_STATE_ENABLED) {
if (nd_cmd.cmd.state & ND_INTEL_SEC_STATE_LOCKED)
return NVDIMM_SECURITY_LOCKED;
else if (nd_cmd.cmd.state & ND_INTEL_SEC_STATE_FROZEN ||
nd_cmd.cmd.state & ND_INTEL_SEC_STATE_PLIMIT)
else if (nd_cmd.cmd.state & ND_INTEL_SEC_STATE_FROZEN
|| nd_cmd.cmd.state &
ND_INTEL_SEC_STATE_PLIMIT)
return NVDIMM_SECURITY_FROZEN;
else
return NVDIMM_SECURITY_UNLOCKED;
}
}
/* this should cover master security disabled as well */
return NVDIMM_SECURITY_DISABLED;
}
@ -86,24 +98,28 @@ static int intel_security_freeze(struct nvdimm *nvdimm)
static int intel_security_change_key(struct nvdimm *nvdimm,
const struct nvdimm_key_data *old_data,
const struct nvdimm_key_data *new_data)
const struct nvdimm_key_data *new_data,
enum nvdimm_passphrase_type ptype)
{
struct nfit_mem *nfit_mem = nvdimm_provider_data(nvdimm);
unsigned int cmd = ptype == NVDIMM_MASTER ?
NVDIMM_INTEL_SET_MASTER_PASSPHRASE :
NVDIMM_INTEL_SET_PASSPHRASE;
struct {
struct nd_cmd_pkg pkg;
struct nd_intel_set_passphrase cmd;
} nd_cmd = {
.pkg = {
.nd_command = NVDIMM_INTEL_SET_PASSPHRASE,
.nd_family = NVDIMM_FAMILY_INTEL,
.nd_size_in = ND_INTEL_PASSPHRASE_SIZE * 2,
.nd_size_out = ND_INTEL_STATUS_SIZE,
.nd_fw_size = ND_INTEL_STATUS_SIZE,
.nd_command = cmd,
},
};
int rc;
if (!test_bit(NVDIMM_INTEL_SET_PASSPHRASE, &nfit_mem->dsm_mask))
if (!test_bit(cmd, &nfit_mem->dsm_mask))
return -ENOTTY;
if (old_data)
@ -212,10 +228,13 @@ static int intel_security_disable(struct nvdimm *nvdimm,
}
static int intel_security_erase(struct nvdimm *nvdimm,
const struct nvdimm_key_data *key)
const struct nvdimm_key_data *key,
enum nvdimm_passphrase_type ptype)
{
int rc;
struct nfit_mem *nfit_mem = nvdimm_provider_data(nvdimm);
unsigned int cmd = ptype == NVDIMM_MASTER ?
NVDIMM_INTEL_MASTER_SECURE_ERASE : NVDIMM_INTEL_SECURE_ERASE;
struct {
struct nd_cmd_pkg pkg;
struct nd_intel_secure_erase cmd;
@ -225,11 +244,11 @@ static int intel_security_erase(struct nvdimm *nvdimm,
.nd_size_in = ND_INTEL_PASSPHRASE_SIZE,
.nd_size_out = ND_INTEL_STATUS_SIZE,
.nd_fw_size = ND_INTEL_STATUS_SIZE,
.nd_command = NVDIMM_INTEL_SECURE_ERASE,
.nd_command = cmd,
},
};
if (!test_bit(NVDIMM_INTEL_SECURE_ERASE, &nfit_mem->dsm_mask))
if (!test_bit(cmd, &nfit_mem->dsm_mask))
return -ENOTTY;
/* flush all cache before we erase DIMM */

24
drivers/nvdimm/dimm_devs.c
View File

@ -386,6 +386,8 @@ static ssize_t security_show(struct device *dev,
return sprintf(buf, "frozen\n");
case NVDIMM_SECURITY_OVERWRITE:
return sprintf(buf, "overwrite\n");
default:
return -ENOTTY;
}
return -ENOTTY;
@ -396,7 +398,9 @@ static ssize_t security_show(struct device *dev,
C( OP_DISABLE, "disable", 2), \
C( OP_UPDATE, "update", 3), \
C( OP_ERASE, "erase", 2), \
C( OP_OVERWRITE, "overwrite", 2)
C( OP_OVERWRITE, "overwrite", 2), \
C( OP_MASTER_UPDATE, "master_update", 3), \
C( OP_MASTER_ERASE, "master_erase", 2)
#undef C
#define C(a, b, c) a
enum nvdimmsec_op_ids { OPS };
@ -449,13 +453,21 @@ static ssize_t __security_store(struct device *dev, const char *buf, size_t len)
rc = nvdimm_security_disable(nvdimm, key);
} else if (i == OP_UPDATE) {
dev_dbg(dev, "update %u %u\n", key, newkey);
rc = nvdimm_security_update(nvdimm, key, newkey);
rc = nvdimm_security_update(nvdimm, key, newkey, NVDIMM_USER);
} else if (i == OP_ERASE) {
dev_dbg(dev, "erase %u\n", key);
rc = nvdimm_security_erase(nvdimm, key);
rc = nvdimm_security_erase(nvdimm, key, NVDIMM_USER);
} else if (i == OP_OVERWRITE) {
dev_dbg(dev, "overwrite %u\n", key);
rc = nvdimm_security_overwrite(nvdimm, key);
} else if (i == OP_MASTER_UPDATE) {
dev_dbg(dev, "master_update %u %u\n", key, newkey);
rc = nvdimm_security_update(nvdimm, key, newkey,
NVDIMM_MASTER);
} else if (i == OP_MASTER_ERASE) {
dev_dbg(dev, "master_erase %u\n", key);
rc = nvdimm_security_erase(nvdimm, key,
NVDIMM_MASTER);
} else
return -EINVAL;
@ -557,7 +569,9 @@ struct nvdimm *__nvdimm_create(struct nvdimm_bus *nvdimm_bus,
* Security state must be initialized before device_add() for
* attribute visibility.
*/
nvdimm->sec.state = nvdimm_security_state(nvdimm);
/* get security state and extended (master) state */
nvdimm->sec.state = nvdimm_security_state(nvdimm, NVDIMM_USER);
nvdimm->sec.ext_state = nvdimm_security_state(nvdimm, NVDIMM_MASTER);
nd_device_register(dev);
return nvdimm;
@ -598,7 +612,7 @@ int nvdimm_security_freeze(struct nvdimm *nvdimm)
}
rc = nvdimm->sec.ops->freeze(nvdimm);
nvdimm->sec.state = nvdimm_security_state(nvdimm);
nvdimm->sec.state = nvdimm_security_state(nvdimm, NVDIMM_USER);
return rc;
}

21
drivers/nvdimm/nd-core.h
View File

@ -46,6 +46,7 @@ struct nvdimm {
struct {
const struct nvdimm_security_ops *ops;
enum nvdimm_security_state state;
enum nvdimm_security_state ext_state;
unsigned int overwrite_tmo;
struct kernfs_node *overwrite_state;
} sec;
@ -53,19 +54,21 @@ struct nvdimm {
};
static inline enum nvdimm_security_state nvdimm_security_state(
struct nvdimm *nvdimm)
struct nvdimm *nvdimm, bool master)
{
if (!nvdimm->sec.ops)
return -ENXIO;
return nvdimm->sec.ops->state(nvdimm);
return nvdimm->sec.ops->state(nvdimm, master);
}
int nvdimm_security_freeze(struct nvdimm *nvdimm);
#if IS_ENABLED(CONFIG_NVDIMM_KEYS)
int nvdimm_security_disable(struct nvdimm *nvdimm, unsigned int keyid);
int nvdimm_security_update(struct nvdimm *nvdimm, unsigned int keyid,
unsigned int new_keyid);
int nvdimm_security_erase(struct nvdimm *nvdimm, unsigned int keyid);
unsigned int new_keyid,
enum nvdimm_passphrase_type pass_type);
int nvdimm_security_erase(struct nvdimm *nvdimm, unsigned int keyid,
enum nvdimm_passphrase_type pass_type);
int nvdimm_security_overwrite(struct nvdimm *nvdimm, unsigned int keyid);
void nvdimm_security_overwrite_query(struct work_struct *work);
#else
@ -74,12 +77,16 @@ static inline int nvdimm_security_disable(struct nvdimm *nvdimm,
{
return -EOPNOTSUPP;
}
static inline int nvdimm_security_update(struct nvdimm *nvdimm, unsigned int keyid,
unsigned int new_keyid)
static inline int nvdimm_security_update(struct nvdimm *nvdimm,
unsigned int keyid,
unsigned int new_keyid,
enum nvdimm_passphrase_type pass_type)
{
return -EOPNOTSUPP;
}
static inline int nvdimm_security_erase(struct nvdimm *nvdimm, unsigned int keyid)
static inline int nvdimm_security_erase(struct nvdimm *nvdimm,
unsigned int keyid,
enum nvdimm_passphrase_type pass_type)
{
return -EOPNOTSUPP;
}

43
drivers/nvdimm/security.c
View File

@ -121,7 +121,8 @@ static struct key *nvdimm_key_revalidate(struct nvdimm *nvdimm)
* Send the same key to the hardware as new and old key to
* verify that the key is good.
*/
rc = nvdimm->sec.ops->change_key(nvdimm, key_data(key), key_data(key));
rc = nvdimm->sec.ops->change_key(nvdimm, key_data(key),
key_data(key), NVDIMM_USER);
if (rc < 0) {
nvdimm_put_key(key);
key = NULL;
@ -173,7 +174,7 @@ static int __nvdimm_security_unlock(struct nvdimm *nvdimm)
rc == 0 ? "success" : "fail");
nvdimm_put_key(key);
nvdimm->sec.state = nvdimm_security_state(nvdimm);
nvdimm->sec.state = nvdimm_security_state(nvdimm, NVDIMM_USER);
return rc;
}
@ -222,12 +223,13 @@ int nvdimm_security_disable(struct nvdimm *nvdimm, unsigned int keyid)
rc == 0 ? "success" : "fail");
nvdimm_put_key(key);
nvdimm->sec.state = nvdimm_security_state(nvdimm);
nvdimm->sec.state = nvdimm_security_state(nvdimm, NVDIMM_USER);
return rc;
}
int nvdimm_security_update(struct nvdimm *nvdimm, unsigned int keyid,
unsigned int new_keyid)
unsigned int new_keyid,
enum nvdimm_passphrase_type pass_type)
{
struct device *dev = &nvdimm->dev;
struct nvdimm_bus *nvdimm_bus = walk_to_nvdimm_bus(dev);
@ -262,18 +264,25 @@ int nvdimm_security_update(struct nvdimm *nvdimm, unsigned int keyid,
}
rc = nvdimm->sec.ops->change_key(nvdimm, key ? key_data(key) : NULL,
key_data(newkey));
dev_dbg(dev, "key: %d %d update: %s\n",
key_data(newkey), pass_type);
dev_dbg(dev, "key: %d %d update%s: %s\n",
key_serial(key), key_serial(newkey),
pass_type == NVDIMM_MASTER ? "(master)" : "(user)",
rc == 0 ? "success" : "fail");
nvdimm_put_key(newkey);
nvdimm_put_key(key);
nvdimm->sec.state = nvdimm_security_state(nvdimm);
if (pass_type == NVDIMM_MASTER)
nvdimm->sec.ext_state = nvdimm_security_state(nvdimm,
NVDIMM_MASTER);
else
nvdimm->sec.state = nvdimm_security_state(nvdimm,
NVDIMM_USER);
return rc;
}
int nvdimm_security_erase(struct nvdimm *nvdimm, unsigned int keyid)
int nvdimm_security_erase(struct nvdimm *nvdimm, unsigned int keyid,
enum nvdimm_passphrase_type pass_type)
{
struct device *dev = &nvdimm->dev;
struct nvdimm_bus *nvdimm_bus = walk_to_nvdimm_bus(dev);
@ -303,16 +312,24 @@ int nvdimm_security_erase(struct nvdimm *nvdimm, unsigned int keyid)
return -EBUSY;
}
if (nvdimm->sec.ext_state != NVDIMM_SECURITY_UNLOCKED
&& pass_type == NVDIMM_MASTER) {
dev_warn(dev,
"Attempt to secure erase in wrong master state.\n");
return -EOPNOTSUPP;
}
key = nvdimm_lookup_user_key(nvdimm, keyid, NVDIMM_BASE_KEY);
if (!key)
return -ENOKEY;
rc = nvdimm->sec.ops->erase(nvdimm, key_data(key));
dev_dbg(dev, "key: %d erase: %s\n", key_serial(key),
rc = nvdimm->sec.ops->erase(nvdimm, key_data(key), pass_type);
dev_dbg(dev, "key: %d erase%s: %s\n", key_serial(key),
pass_type == NVDIMM_MASTER ? "(master)" : "(user)",
rc == 0 ? "success" : "fail");
nvdimm_put_key(key);
nvdimm->sec.state = nvdimm_security_state(nvdimm);
nvdimm->sec.state = nvdimm_security_state(nvdimm, NVDIMM_USER);
return rc;
}
@ -375,6 +392,7 @@ int nvdimm_security_overwrite(struct nvdimm *nvdimm, unsigned int keyid)
get_device(dev);
queue_delayed_work(system_wq, &nvdimm->dwork, 0);
}
return rc;
}
@ -421,7 +439,8 @@ void __nvdimm_security_overwrite_query(struct nvdimm *nvdimm)
clear_bit(NDD_SECURITY_OVERWRITE, &nvdimm->flags);
clear_bit(NDD_WORK_PENDING, &nvdimm->flags);
put_device(&nvdimm->dev);
nvdimm->sec.state = nvdimm_security_state(nvdimm);
nvdimm->sec.state = nvdimm_security_state(nvdimm, NVDIMM_USER);
nvdimm->sec.ext_state = nvdimm_security_state(nvdimm, NVDIMM_MASTER);
}
void nvdimm_security_overwrite_query(struct work_struct *work)

14
include/linux/libnvdimm.h
View File

@ -174,18 +174,26 @@ struct nvdimm_key_data {
u8 data[NVDIMM_PASSPHRASE_LEN];
};
enum nvdimm_passphrase_type {
NVDIMM_USER,
NVDIMM_MASTER,
};
struct nvdimm_security_ops {
enum nvdimm_security_state (*state)(struct nvdimm *nvdimm);
enum nvdimm_security_state (*state)(struct nvdimm *nvdimm,
enum nvdimm_passphrase_type pass_type);
int (*freeze)(struct nvdimm *nvdimm);
int (*change_key)(struct nvdimm *nvdimm,
const struct nvdimm_key_data *old_data,
const struct nvdimm_key_data *new_data);
const struct nvdimm_key_data *new_data,
enum nvdimm_passphrase_type pass_type);
int (*unlock)(struct nvdimm *nvdimm,
const struct nvdimm_key_data *key_data);
int (*disable)(struct nvdimm *nvdimm,
const struct nvdimm_key_data *key_data);
int (*erase)(struct nvdimm *nvdimm,
const struct nvdimm_key_data *key_data);
const struct nvdimm_key_data *key_data,
enum nvdimm_passphrase_type pass_type);
int (*overwrite)(struct nvdimm *nvdimm,
const struct nvdimm_key_data *key_data);
int (*query_overwrite)(struct nvdimm *nvdimm);