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-rw-r--r--security/integrity/digsig.c31
-rw-r--r--security/integrity/digsig_asymmetric.c2
-rw-r--r--security/integrity/evm/evm_crypto.c2
-rw-r--r--security/integrity/ima/ima_mok.c13
-rw-r--r--security/integrity/integrity.h6
-rw-r--r--security/integrity/platform_certs/platform_keyring.c14
6 files changed, 39 insertions, 29 deletions
diff --git a/security/integrity/digsig.c b/security/integrity/digsig.c
index 4582bc26770a..ceb10553a6ba 100644
--- a/security/integrity/digsig.c
+++ b/security/integrity/digsig.c
@@ -47,7 +47,8 @@ int integrity_digsig_verify(const unsigned int id, const char *sig, int siglen,
if (!keyring[id]) {
keyring[id] =
- request_key(&key_type_keyring, keyring_name[id], NULL);
+ request_key(&key_type_keyring, keyring_name[id],
+ NULL, NULL);
if (IS_ERR(keyring[id])) {
int err = PTR_ERR(keyring[id]);
pr_err("no %s keyring: %d\n", keyring_name[id], err);
@@ -69,14 +70,14 @@ int integrity_digsig_verify(const unsigned int id, const char *sig, int siglen,
return -EOPNOTSUPP;
}
-static int __integrity_init_keyring(const unsigned int id, key_perm_t perm,
+static int __integrity_init_keyring(const unsigned int id, struct key_acl *acl,
struct key_restriction *restriction)
{
const struct cred *cred = current_cred();
int err = 0;
keyring[id] = keyring_alloc(keyring_name[id], KUIDT_INIT(0),
- KGIDT_INIT(0), cred, perm,
+ KGIDT_INIT(0), cred, acl,
KEY_ALLOC_NOT_IN_QUOTA, restriction, NULL);
if (IS_ERR(keyring[id])) {
err = PTR_ERR(keyring[id]);
@@ -94,10 +95,7 @@ static int __integrity_init_keyring(const unsigned int id, key_perm_t perm,
int __init integrity_init_keyring(const unsigned int id)
{
struct key_restriction *restriction;
- key_perm_t perm;
-
- perm = (KEY_POS_ALL & ~KEY_POS_SETATTR) | KEY_USR_VIEW
- | KEY_USR_READ | KEY_USR_SEARCH;
+ struct key_acl *acl = &internal_keyring_acl;
if (id == INTEGRITY_KEYRING_PLATFORM) {
restriction = NULL;
@@ -112,14 +110,14 @@ int __init integrity_init_keyring(const unsigned int id)
return -ENOMEM;
restriction->check = restrict_link_to_ima;
- perm |= KEY_USR_WRITE;
+ acl = &internal_writable_keyring_acl;
out:
- return __integrity_init_keyring(id, perm, restriction);
+ return __integrity_init_keyring(id, acl, restriction);
}
-int __init integrity_add_key(const unsigned int id, const void *data,
- off_t size, key_perm_t perm)
+static int __init integrity_add_key(const unsigned int id, const void *data,
+ off_t size, struct key_acl *acl)
{
key_ref_t key;
int rc = 0;
@@ -128,7 +126,7 @@ int __init integrity_add_key(const unsigned int id, const void *data,
return -EINVAL;
key = key_create_or_update(make_key_ref(keyring[id], 1), "asymmetric",
- NULL, data, size, perm,
+ NULL, data, size, acl ?: &internal_key_acl,
KEY_ALLOC_NOT_IN_QUOTA);
if (IS_ERR(key)) {
rc = PTR_ERR(key);
@@ -148,7 +146,6 @@ int __init integrity_load_x509(const unsigned int id, const char *path)
void *data;
loff_t size;
int rc;
- key_perm_t perm;
rc = kernel_read_file_from_path(path, &data, &size, 0,
READING_X509_CERTIFICATE);
@@ -157,21 +154,19 @@ int __init integrity_load_x509(const unsigned int id, const char *path)
return rc;
}
- perm = (KEY_POS_ALL & ~KEY_POS_SETATTR) | KEY_USR_VIEW | KEY_USR_READ;
-
pr_info("Loading X.509 certificate: %s\n", path);
- rc = integrity_add_key(id, (const void *)data, size, perm);
+ rc = integrity_add_key(id, data, size, NULL);
vfree(data);
return rc;
}
int __init integrity_load_cert(const unsigned int id, const char *source,
- const void *data, size_t len, key_perm_t perm)
+ const void *data, size_t len, struct key_acl *acl)
{
if (!data)
return -EINVAL;
pr_info("Loading X.509 certificate: %s\n", source);
- return integrity_add_key(id, data, len, perm);
+ return integrity_add_key(id, data, len, acl);
}
diff --git a/security/integrity/digsig_asymmetric.c b/security/integrity/digsig_asymmetric.c
index 55aec161d0e1..a29df775fdd8 100644
--- a/security/integrity/digsig_asymmetric.c
+++ b/security/integrity/digsig_asymmetric.c
@@ -53,7 +53,7 @@ static struct key *request_asymmetric_key(struct key *keyring, uint32_t keyid)
else
key = key_ref_to_ptr(kref);
} else {
- key = request_key(&key_type_asymmetric, name, NULL);
+ key = request_key(&key_type_asymmetric, name, NULL, NULL);
}
if (IS_ERR(key)) {
diff --git a/security/integrity/evm/evm_crypto.c b/security/integrity/evm/evm_crypto.c
index d485f6fc908e..466eebd3b4aa 100644
--- a/security/integrity/evm/evm_crypto.c
+++ b/security/integrity/evm/evm_crypto.c
@@ -356,7 +356,7 @@ int evm_init_key(void)
struct encrypted_key_payload *ekp;
int rc;
- evm_key = request_key(&key_type_encrypted, EVMKEY, NULL);
+ evm_key = request_key(&key_type_encrypted, EVMKEY, NULL, NULL);
if (IS_ERR(evm_key))
return -ENOENT;
diff --git a/security/integrity/ima/ima_mok.c b/security/integrity/ima/ima_mok.c
index 36cadadbfba4..b52ae1476ec3 100644
--- a/security/integrity/ima/ima_mok.c
+++ b/security/integrity/ima/ima_mok.c
@@ -16,6 +16,15 @@
#include <keys/system_keyring.h>
+static struct key_acl integrity_blacklist_keyring_acl = {
+ .usage = REFCOUNT_INIT(1),
+ .nr_ace = 2,
+ .aces = {
+ KEY_POSSESSOR_ACE(KEY_ACE_SEARCH | KEY_ACE_WRITE),
+ KEY_OWNER_ACE(KEY_ACE_VIEW | KEY_ACE_READ | KEY_ACE_WRITE | KEY_ACE_SEARCH),
+ }
+};
+
struct key *ima_blacklist_keyring;
/*
@@ -35,9 +44,7 @@ __init int ima_mok_init(void)
ima_blacklist_keyring = keyring_alloc(".ima_blacklist",
KUIDT_INIT(0), KGIDT_INIT(0), current_cred(),
- (KEY_POS_ALL & ~KEY_POS_SETATTR) |
- KEY_USR_VIEW | KEY_USR_READ |
- KEY_USR_WRITE | KEY_USR_SEARCH,
+ &integrity_blacklist_keyring_acl,
KEY_ALLOC_NOT_IN_QUOTA,
restriction, NULL);
diff --git a/security/integrity/integrity.h b/security/integrity/integrity.h
index 65377848fbc5..45f4aef83e29 100644
--- a/security/integrity/integrity.h
+++ b/security/integrity/integrity.h
@@ -12,6 +12,8 @@
#include <linux/key.h>
#include <linux/audit.h>
+struct key_acl;
+
/* iint action cache flags */
#define IMA_MEASURE 0x00000001
#define IMA_MEASURED 0x00000002
@@ -149,7 +151,7 @@ int integrity_digsig_verify(const unsigned int id, const char *sig, int siglen,
int __init integrity_init_keyring(const unsigned int id);
int __init integrity_load_x509(const unsigned int id, const char *path);
int __init integrity_load_cert(const unsigned int id, const char *source,
- const void *data, size_t len, key_perm_t perm);
+ const void *data, size_t len, struct key_acl *acl);
#else
static inline int integrity_digsig_verify(const unsigned int id,
@@ -167,7 +169,7 @@ static inline int integrity_init_keyring(const unsigned int id)
static inline int __init integrity_load_cert(const unsigned int id,
const char *source,
const void *data, size_t len,
- key_perm_t perm)
+ struct key_acl *acl)
{
return 0;
}
diff --git a/security/integrity/platform_certs/platform_keyring.c b/security/integrity/platform_certs/platform_keyring.c
index bcafd7387729..7646e35f2d91 100644
--- a/security/integrity/platform_certs/platform_keyring.c
+++ b/security/integrity/platform_certs/platform_keyring.c
@@ -14,6 +14,15 @@
#include <linux/slab.h>
#include "../integrity.h"
+static struct key_acl platform_key_acl = {
+ .usage = REFCOUNT_INIT(1),
+ .nr_ace = 2,
+ .aces = {
+ KEY_POSSESSOR_ACE(KEY_ACE_SEARCH | KEY_ACE_READ),
+ KEY_OWNER_ACE(KEY_ACE_VIEW),
+ }
+};
+
/**
* add_to_platform_keyring - Add to platform keyring without validation.
* @source: Source of key
@@ -26,13 +35,10 @@
void __init add_to_platform_keyring(const char *source, const void *data,
size_t len)
{
- key_perm_t perm;
int rc;
- perm = (KEY_POS_ALL & ~KEY_POS_SETATTR) | KEY_USR_VIEW;
-
rc = integrity_load_cert(INTEGRITY_KEYRING_PLATFORM, source, data, len,
- perm);
+ &platform_key_acl);
if (rc)
pr_info("Error adding keys to platform keyring %s\n", source);
}
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.