From 89fa9d8ea7bdfa841d19044485cec5f4171069e5 Mon Sep 17 00:00:00 2001 From: Dave Jiang Date: Mon, 10 Dec 2018 10:53:22 -0700 Subject: acpi/nfit, libnvdimm/security: add Intel DSM 1.8 master passphrase support 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 Signed-off-by: Dan Williams --- drivers/nvdimm/dimm_devs.c | 34 ++++++++++++++++++++++++---------- drivers/nvdimm/nd-core.h | 21 ++++++++++++++------- drivers/nvdimm/security.c | 43 +++++++++++++++++++++++++++++++------------ 3 files changed, 69 insertions(+), 29 deletions(-) (limited to 'drivers/nvdimm') diff --git a/drivers/nvdimm/dimm_devs.c b/drivers/nvdimm/dimm_devs.c index 6affa270abd3..bd3f156463b1 100644 --- a/drivers/nvdimm/dimm_devs.c +++ b/drivers/nvdimm/dimm_devs.c @@ -386,17 +386,21 @@ 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; } -#define OPS \ - C( OP_FREEZE, "freeze", 1), \ - C( OP_DISABLE, "disable", 2), \ - C( OP_UPDATE, "update", 3), \ - C( OP_ERASE, "erase", 2), \ - C( OP_OVERWRITE, "overwrite", 2) +#define OPS \ + C( OP_FREEZE, "freeze", 1), \ + C( OP_DISABLE, "disable", 2), \ + C( OP_UPDATE, "update", 3), \ + C( OP_ERASE, "erase", 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; } diff --git a/drivers/nvdimm/nd-core.h b/drivers/nvdimm/nd-core.h index 952d688982d8..52d20d9f39f6 100644 --- a/drivers/nvdimm/nd-core.h +++ b/drivers/nvdimm/nd-core.h @@ -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; } diff --git a/drivers/nvdimm/security.c b/drivers/nvdimm/security.c index 5055979f89c4..d9a39dc251e9 100644 --- a/drivers/nvdimm/security.c +++ b/drivers/nvdimm/security.c @@ -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) -- cgit v1.2.3