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Diffstat (limited to 'security/apparmor/crypto.c')
-rw-r--r--security/apparmor/crypto.c39
1 files changed, 38 insertions, 1 deletions
diff --git a/security/apparmor/crypto.c b/security/apparmor/crypto.c
index b75dab0df1cb..de8dc78b6144 100644
--- a/security/apparmor/crypto.c
+++ b/security/apparmor/crypto.c
@@ -29,6 +29,43 @@ unsigned int aa_hash_size(void)
return apparmor_hash_size;
}
+char *aa_calc_hash(void *data, size_t len)
+{
+ struct {
+ struct shash_desc shash;
+ char ctx[crypto_shash_descsize(apparmor_tfm)];
+ } desc;
+ char *hash = NULL;
+ int error = -ENOMEM;
+
+ if (!apparmor_tfm)
+ return NULL;
+
+ hash = kzalloc(apparmor_hash_size, GFP_KERNEL);
+ if (!hash)
+ goto fail;
+
+ desc.shash.tfm = apparmor_tfm;
+ desc.shash.flags = 0;
+
+ error = crypto_shash_init(&desc.shash);
+ if (error)
+ goto fail;
+ error = crypto_shash_update(&desc.shash, (u8 *) data, len);
+ if (error)
+ goto fail;
+ error = crypto_shash_final(&desc.shash, hash);
+ if (error)
+ goto fail;
+
+ return hash;
+
+fail:
+ kfree(hash);
+
+ return ERR_PTR(error);
+}
+
int aa_calc_profile_hash(struct aa_profile *profile, u32 version, void *start,
size_t len)
{
@@ -37,7 +74,7 @@ int aa_calc_profile_hash(struct aa_profile *profile, u32 version, void *start,
char ctx[crypto_shash_descsize(apparmor_tfm)];
} desc;
int error = -ENOMEM;
- u32 le32_version = cpu_to_le32(version);
+ __le32 le32_version = cpu_to_le32(version);
if (!aa_g_hash_policy)
return 0;