diff options
Diffstat (limited to 'security/apparmor/crypto.c')
| -rw-r--r-- | security/apparmor/crypto.c | 39 |
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; |