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integrity: Small code improvements

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These changes are too small to warrant their own patches:

The keyid and sig_size members of struct signature_v2_hdr are in BE format,
so use a type that makes this assumption explicit. Also, use beXX_to_cpu
instead of __beXX_to_cpu to read them.

Change integrity_kernel_read to take a void * buffer instead of char *
buffer, so that callers don't have to use a cast if they provide a buffer
that isn't a char *.

Add missing #endif comment in ima.h pointing out which macro it refers to.

Add missing fall through comment in ima_appraise.c.

Constify mask_tokens and func_tokens arrays.

Signed-off-by: Thiago Jung Bauermann <bauerman@linux.vnet.ibm.com>
Signed-off-by: Mimi Zohar <zohar@linux.vnet.ibm.com>
This commit is contained in:
Thiago Jung Bauermann 2017-06-07 22:49:10 -03:00 committed by Mimi Zohar
parent e4586c79d4
commit bb543e3959
6 changed files with 11 additions and 9 deletions
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4
security/integrity/digsig_asymmetric.c
View File

@ -92,13 +92,13 @@ int asymmetric_verify(struct key *keyring, const char *sig,
siglen -= sizeof(*hdr);
if (siglen != __be16_to_cpu(hdr->sig_size))
if (siglen != be16_to_cpu(hdr->sig_size))
return -EBADMSG;
if (hdr->hash_algo >= HASH_ALGO__LAST)
return -ENOPKG;
key = request_asymmetric_key(keyring, __be32_to_cpu(hdr->keyid));
key = request_asymmetric_key(keyring, be32_to_cpu(hdr->keyid));
if (IS_ERR(key))
return PTR_ERR(key);

2
security/integrity/iint.c
View File

@ -182,7 +182,7 @@ security_initcall(integrity_iintcache_init);
*
*/
int integrity_kernel_read(struct file *file, loff_t offset,
char *addr, unsigned long count)
void *addr, unsigned long count)
{
mm_segment_t old_fs;
char __user *buf = (char __user *)addr;

2
security/integrity/ima/ima.h
View File

@ -284,7 +284,7 @@ static inline int ima_read_xattr(struct dentry *dentry,
return 0;
}
#endif
#endif /* CONFIG_IMA_APPRAISE */
/* LSM based policy rules require audit */
#ifdef CONFIG_IMA_LSM_RULES

1
security/integrity/ima/ima_appraise.c
View File

@ -240,6 +240,7 @@ int ima_appraise_measurement(enum ima_hooks func,
case IMA_XATTR_DIGEST_NG:
/* first byte contains algorithm id */
hash_start = 1;
/* fall through */
case IMA_XATTR_DIGEST:
if (iint->flags & IMA_DIGSIG_REQUIRED) {
cause = "IMA-signature-required";

4
security/integrity/ima/ima_policy.c
View File

@ -965,7 +965,7 @@ enum {
mask_exec = 0, mask_write, mask_read, mask_append
};
static char *mask_tokens[] = {
static const char *const mask_tokens[] = {
"MAY_EXEC",
"MAY_WRITE",
"MAY_READ",
@ -979,7 +979,7 @@ enum {
func_policy
};
static char *func_tokens[] = {
static const char *const func_tokens[] = {
"FILE_CHECK",
"MMAP_CHECK",
"BPRM_CHECK",

7
security/integrity/integrity.h
View File

@ -92,8 +92,8 @@ struct signature_v2_hdr {
uint8_t type; /* xattr type */
uint8_t version; /* signature format version */
uint8_t hash_algo; /* Digest algorithm [enum hash_algo] */
uint32_t keyid; /* IMA key identifier - not X509/PGP specific */
uint16_t sig_size; /* signature size */
__be32 keyid; /* IMA key identifier - not X509/PGP specific */
__be16 sig_size; /* signature size */
uint8_t sig[0]; /* signature payload */
} __packed;
@ -118,7 +118,8 @@ struct integrity_iint_cache {
struct integrity_iint_cache *integrity_iint_find(struct inode *inode);
int integrity_kernel_read(struct file *file, loff_t offset,
char *addr, unsigned long count);
void *addr, unsigned long count);
int __init integrity_read_file(const char *path, char **data);
#define INTEGRITY_KEYRING_EVM 0