diff options
| -rw-r--r-- | security/integrity/ima/ima.h | 2 | ||||
| -rw-r--r-- | security/integrity/ima/ima_crypto.c | 24 | ||||
| -rw-r--r-- | security/integrity/ima/ima_init.c | 10 |
3 files changed, 31 insertions, 5 deletions
diff --git a/security/integrity/ima/ima.h b/security/integrity/ima/ima.h index 52393edfbfd..e0e1cde6e67 100644 --- a/security/integrity/ima/ima.h +++ b/security/integrity/ima/ima.h @@ -73,7 +73,7 @@ int ima_add_template_entry(struct ima_template_entry *entry, int violation, int ima_calc_file_hash(struct file *file, struct ima_digest_data *hash); int ima_calc_buffer_hash(const void *data, int len, struct ima_digest_data *hash); -int ima_calc_boot_aggregate(char *digest); +int __init ima_calc_boot_aggregate(struct ima_digest_data *hash); void ima_add_violation(struct inode *inode, const unsigned char *filename, const char *op, const char *cause); int ima_init_crypto(void); diff --git a/security/integrity/ima/ima_crypto.c b/security/integrity/ima/ima_crypto.c index e2be2524a37..22be23f13b3 100644 --- a/security/integrity/ima/ima_crypto.c +++ b/security/integrity/ima/ima_crypto.c @@ -184,16 +184,17 @@ static void __init ima_pcrread(int idx, u8 *pcr) /* * Calculate the boot aggregate hash */ -int __init ima_calc_boot_aggregate(char *digest) +static int __init ima_calc_boot_aggregate_tfm(char *digest, + struct crypto_shash *tfm) { u8 pcr_i[TPM_DIGEST_SIZE]; int rc, i; struct { struct shash_desc shash; - char ctx[crypto_shash_descsize(ima_shash_tfm)]; + char ctx[crypto_shash_descsize(tfm)]; } desc; - desc.shash.tfm = ima_shash_tfm; + desc.shash.tfm = tfm; desc.shash.flags = 0; rc = crypto_shash_init(&desc.shash); @@ -210,3 +211,20 @@ int __init ima_calc_boot_aggregate(char *digest) crypto_shash_final(&desc.shash, digest); return rc; } + +int __init ima_calc_boot_aggregate(struct ima_digest_data *hash) +{ + struct crypto_shash *tfm; + int rc; + + tfm = ima_alloc_tfm(hash->algo); + if (IS_ERR(tfm)) + return PTR_ERR(tfm); + + hash->length = crypto_shash_digestsize(tfm); + rc = ima_calc_boot_aggregate_tfm(hash->digest, tfm); + + ima_free_tfm(tfm); + + return rc; +} diff --git a/security/integrity/ima/ima_init.c b/security/integrity/ima/ima_init.c index 9d0243c1055..77cd5005f2d 100644 --- a/security/integrity/ima/ima_init.c +++ b/security/integrity/ima/ima_init.c @@ -18,6 +18,7 @@ #include <linux/scatterlist.h> #include <linux/slab.h> #include <linux/err.h> +#include <crypto/hash_info.h> #include "ima.h" /* name for boot aggregate entry */ @@ -46,6 +47,10 @@ static void __init ima_add_boot_aggregate(void) const char *audit_cause = "ENOMEM"; int result = -ENOMEM; int violation = 1; + struct { + struct ima_digest_data hdr; + char digest[TPM_DIGEST_SIZE]; + } hash; entry = kmalloc(sizeof(*entry), GFP_KERNEL); if (!entry) @@ -56,12 +61,15 @@ static void __init ima_add_boot_aggregate(void) IMA_EVENT_NAME_LEN_MAX); if (ima_used_chip) { violation = 0; - result = ima_calc_boot_aggregate(entry->template.digest); + hash.hdr.algo = HASH_ALGO_SHA1; + result = ima_calc_boot_aggregate(&hash.hdr); if (result < 0) { audit_cause = "hashing_error"; kfree(entry); goto err_out; } + memcpy(entry->template.digest, hash.hdr.digest, + hash.hdr.length); } result = ima_store_template(entry, violation, NULL); if (result < 0) |