Messages in this thread Patch in this message | | | From | Dmitry Kasatkin <> | Subject | [PATCH 12/20] ima: provide buffer hash calculation function | Date | Wed, 23 Apr 2014 16:30:30 +0300 |
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This patch provides convenient buffer hash calculation function.
Signed-off-by: Dmitry Kasatkin <d.kasatkin@samsung.com> --- security/integrity/ima/ima.h | 1 + security/integrity/ima/ima_crypto.c | 11 +++++++++-- 2 files changed, 10 insertions(+), 2 deletions(-)
diff --git a/security/integrity/ima/ima.h b/security/integrity/ima/ima.h index f4c1e8dd..a5d5ccb 100644 --- a/security/integrity/ima/ima.h +++ b/security/integrity/ima/ima.h @@ -98,6 +98,7 @@ int ima_add_template_entry(struct ima_template_entry *entry, int violation, const char *op, struct inode *inode, const unsigned char *filename); int ima_calc_file_hash(struct file *file, struct ima_digest_data *hash); +int ima_calc_buffer_hash(const void *buf, int len, struct ima_digest_data *hash); int ima_calc_field_array_hash(struct ima_field_data *field_data, struct ima_template_desc *desc, int num_fields, struct ima_digest_data *hash); diff --git a/security/integrity/ima/ima_crypto.c b/security/integrity/ima/ima_crypto.c index 139e7f7..50c78c0 100644 --- a/security/integrity/ima/ima_crypto.c +++ b/security/integrity/ima/ima_crypto.c @@ -434,13 +434,13 @@ static int ima_calc_field_array_hash_tfm(struct ima_field_data *field_data, u8 *data_to_hash = field_data[i].data; u32 datalen = field_data[i].len; - if (strcmp(td->name, IMA_TEMPLATE_IMA_NAME) != 0) { + if (td && strcmp(td->name, IMA_TEMPLATE_IMA_NAME) != 0) { rc = crypto_shash_update(&desc.shash, (const u8 *) &field_data[i].len, sizeof(field_data[i].len)); if (rc) break; - } else if (strcmp(td->fields[i]->field_id, "n") == 0) { + } else if (td && strcmp(td->fields[i]->field_id, "n") == 0) { memcpy(buffer, data_to_hash, datalen); data_to_hash = buffer; datalen = IMA_EVENT_NAME_LEN_MAX + 1; @@ -475,6 +475,13 @@ int ima_calc_field_array_hash(struct ima_field_data *field_data, return rc; } +int ima_calc_buffer_hash(const void *buf, int len, struct ima_digest_data *hash) +{ + struct ima_field_data fd = { .data = (u8 *)buf, .len = len }; + + return ima_calc_field_array_hash(&fd, NULL, 1, hash); +} + static void __init ima_pcrread(int idx, u8 *pcr) { if (!ima_used_chip) -- 1.8.3.2
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