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Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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1234567891011121314151617181920212223242526272829303132333435363738394041424344454647484950515253545556575859606162// SPDX-License-Identifier: GPL-2.0-only/* * AppArmor security module * * This file contains AppArmor policy loading interface function definitions. * * Copyright 2013 Canonical Ltd. * * Fns to provide a checksum of policy that has been loaded this can be * compared to userspace policy compiles to check loaded policy is what * it should be. */
#include <crypto/sha2.h>
#include "include/apparmor.h"#include "include/crypto.h"
unsigned int aa_hash_size(void){ return SHA256_DIGEST_SIZE;}
char *aa_calc_hash(void *data, size_t len){ char *hash;
hash = kzalloc(SHA256_DIGEST_SIZE, GFP_KERNEL); if (!hash) return ERR_PTR(-ENOMEM);
sha256(data, len, hash); return hash;}
int aa_calc_profile_hash(struct aa_profile *profile, u32 version, void *start, size_t len){ struct sha256_ctx sctx; __le32 le32_version = cpu_to_le32(version);
if (!aa_g_hash_policy) return 0;
profile->hash = kzalloc(SHA256_DIGEST_SIZE, GFP_KERNEL); if (!profile->hash) return -ENOMEM;
sha256_init(&sctx); sha256_update(&sctx, (u8 *)&le32_version, 4); sha256_update(&sctx, (u8 *)start, len); sha256_final(&sctx, profile->hash); return 0;}
int __init init_profile_hash(void){ if (apparmor_initialized) aa_info_message("AppArmor sha256 policy hashing enabled"); return 0;}