summaryrefslogtreecommitdiffstats
path: root/security/integrity
diff options
context:
space:
mode:
Diffstat (limited to 'security/integrity')
-rw-r--r--security/integrity/ima/ima.h1
-rw-r--r--security/integrity/ima/ima_init.c4
-rw-r--r--security/integrity/ima/ima_queue.c27
3 files changed, 31 insertions, 1 deletions
diff --git a/security/integrity/ima/ima.h b/security/integrity/ima/ima.h
index cc12f3449a72..89d65cf8053d 100644
--- a/security/integrity/ima/ima.h
+++ b/security/integrity/ima/ima.h
@@ -153,6 +153,7 @@ int ima_measurements_show(struct seq_file *m, void *v);
unsigned long ima_get_binary_runtime_size(void);
int ima_init_template(void);
void ima_init_template_list(void);
+int __init ima_init_digests(void);
/*
* used to protect h_table and sha_table
diff --git a/security/integrity/ima/ima_init.c b/security/integrity/ima/ima_init.c
index 6bb42a9c5e47..6c9295449751 100644
--- a/security/integrity/ima/ima_init.c
+++ b/security/integrity/ima/ima_init.c
@@ -123,8 +123,12 @@ int __init ima_init(void)
if (rc != 0)
return rc;
+ /* It can be called before ima_init_digests(), it does not use TPM. */
ima_load_kexec_buffer();
+ rc = ima_init_digests();
+ if (rc != 0)
+ return rc;
rc = ima_add_boot_aggregate(); /* boot aggregate must be first entry */
if (rc != 0)
return rc;
diff --git a/security/integrity/ima/ima_queue.c b/security/integrity/ima/ima_queue.c
index 0e41dc1df1d4..6b6d044e0440 100644
--- a/security/integrity/ima/ima_queue.c
+++ b/security/integrity/ima/ima_queue.c
@@ -27,6 +27,9 @@
#define AUDIT_CAUSE_LEN_MAX 32
+/* pre-allocated array of tpm_digest structures to extend a PCR */
+static struct tpm_digest *digests;
+
LIST_HEAD(ima_measurements); /* list of all measurements */
#ifdef CONFIG_IMA_KEXEC
static unsigned long binary_runtime_size;
@@ -140,11 +143,15 @@ unsigned long ima_get_binary_runtime_size(void)
static int ima_pcr_extend(const u8 *hash, int pcr)
{
int result = 0;
+ int i;
if (!ima_tpm_chip)
return result;
- result = tpm_pcr_extend(ima_tpm_chip, pcr, hash);
+ for (i = 0; i < ima_tpm_chip->nr_allocated_banks; i++)
+ memcpy(digests[i].digest, hash, TPM_DIGEST_SIZE);
+
+ result = tpm_pcr_extend(ima_tpm_chip, pcr, digests);
if (result != 0)
pr_err("Error Communicating to TPM chip, result: %d\n", result);
return result;
@@ -211,3 +218,21 @@ int ima_restore_measurement_entry(struct ima_template_entry *entry)
mutex_unlock(&ima_extend_list_mutex);
return result;
}
+
+int __init ima_init_digests(void)
+{
+ int i;
+
+ if (!ima_tpm_chip)
+ return 0;
+
+ digests = kcalloc(ima_tpm_chip->nr_allocated_banks, sizeof(*digests),
+ GFP_NOFS);
+ if (!digests)
+ return -ENOMEM;
+
+ for (i = 0; i < ima_tpm_chip->nr_allocated_banks; i++)
+ digests[i].alg_id = ima_tpm_chip->allocated_banks[i].alg_id;
+
+ return 0;
+}