/*
* This function writes the digest of an event (without size limit).
*/
int ima_eventdigest_ng_init(struct ima_event_data *event_data,
struct ima_field_data *field_data)
{
u8 *cur_digest = NULL, hash_algo = HASH_ALGO_SHA1;
u32 cur_digestsize = 0;
if (event_data->violation) /* recording a violation. */
goto out;
cur_digest = event_data->iint->ima_hash->digest;
cur_digestsize = event_data->iint->ima_hash->length;
hash_algo = event_data->iint->ima_hash->algo;
out:
return ima_eventdigest_init_common(cur_digest, cur_digestsize,
hash_algo, field_data);
}
/*
* This function writes the digest of an event (with size limit).
*/
int ima_eventdigest_init(struct integrity_iint_cache *iint, struct file *file,
const unsigned char *filename,
struct evm_ima_xattr_data *xattr_value, int xattr_len,
struct ima_field_data *field_data)
{
struct {
struct ima_digest_data hdr;
char digest[IMA_MAX_DIGEST_SIZE];
} hash;
u8 *cur_digest = NULL;
u32 cur_digestsize = 0;
struct inode *inode;
int result;
memset(&hash, 0, sizeof(hash));
if (!iint) /* recording a violation. */
goto out;
if (ima_template_hash_algo_allowed(iint->ima_hash->algo)) {
cur_digest = iint->ima_hash->digest;
cur_digestsize = iint->ima_hash->length;
goto out;
}
if (!file) /* missing info to re-calculate the digest */
return -EINVAL;
inode = file_inode(file);
hash.hdr.algo = ima_template_hash_algo_allowed(ima_hash_algo) ?
ima_hash_algo : HASH_ALGO_SHA1;
result = ima_calc_file_hash(file, &hash.hdr);
if (result) {
integrity_audit_msg(AUDIT_INTEGRITY_DATA, inode,
filename, "collect_data",
"failed", result, 0);
return result;
}
cur_digest = hash.hdr.digest;
cur_digestsize = hash.hdr.length;
out:
return ima_eventdigest_init_common(cur_digest, cur_digestsize,
HASH_ALGO__LAST, field_data);
}
/*
* This function writes the digest of an event (without size limit).
*/
int ima_eventdigest_ng_init(struct integrity_iint_cache *iint,
struct file *file, const unsigned char *filename,
struct evm_ima_xattr_data *xattr_value,
int xattr_len, struct ima_field_data *field_data)
{
u8 *cur_digest = NULL, hash_algo = HASH_ALGO_SHA1;
u32 cur_digestsize = 0;
/* If iint is NULL, we are recording a violation. */
if (!iint)
goto out;
cur_digest = iint->ima_hash->digest;
cur_digestsize = iint->ima_hash->length;
hash_algo = iint->ima_hash->algo;
out:
return ima_eventdigest_init_common(cur_digest, cur_digestsize,
hash_algo, field_data);
}
