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yaml --- r: 352874 b: refs/heads/master c: 74de668 h: refs/heads/master v: v3
git-mirror · Feb 6, 2013 · 385c0ae · 385c0ae
1 parent 1180d9d
commit 385c0ae
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Showing 5 changed files with 19 additions and 1 deletion.
diff --git a/[refs] b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 6e38bfaad6c83bdd07eb659f9bfd50f8d71a5a46
+refs/heads/master: 74de66842473bdafa798010e58f1999ec70a8983
diff --git a/trunk/security/integrity/evm/Kconfig b/trunk/security/integrity/evm/Kconfig
@@ -11,3 +11,16 @@ config EVM
 	  integrity attacks.
 
 	  If you are unsure how to answer this question, answer N.
+
+config EVM_HMAC_VERSION
+	int "EVM HMAC version"
+	depends on EVM
+	default 2
+	help
+	  This options adds EVM HMAC version support.
+	  1 - original version
+	  2 - add per filesystem unique identifier (UUID) (default)
+
+	  WARNING: changing the HMAC calculation method or adding 
+	  additional info to the calculation, requires existing EVM
+	  labeled file systems to be relabeled.  
diff --git a/trunk/security/integrity/evm/evm.h b/trunk/security/integrity/evm/evm.h
@@ -24,6 +24,7 @@
 extern int evm_initialized;
 extern char *evm_hmac;
 extern char *evm_hash;
+extern int evm_hmac_version;
 
 extern struct crypto_shash *hmac_tfm;
 extern struct crypto_shash *hash_tfm;

diff --git a/trunk/security/integrity/evm/evm_crypto.c b/trunk/security/integrity/evm/evm_crypto.c
@@ -110,6 +110,9 @@ static void hmac_add_misc(struct shash_desc *desc, struct inode *inode,
 	hmac_misc.gid = from_kgid(&init_user_ns, inode->i_gid);
 	hmac_misc.mode = inode->i_mode;
 	crypto_shash_update(desc, (const u8 *)&hmac_misc, sizeof hmac_misc);
+	if (evm_hmac_version > 1)
+		crypto_shash_update(desc, inode->i_sb->s_uuid,
+				    sizeof(inode->i_sb->s_uuid));
 	crypto_shash_final(desc, digest);
 }
 

diff --git a/trunk/security/integrity/evm/evm_main.c b/trunk/security/integrity/evm/evm_main.c
@@ -26,6 +26,7 @@ int evm_initialized;
 
 char *evm_hmac = "hmac(sha1)";
 char *evm_hash = "sha1";
+int evm_hmac_version = CONFIG_EVM_HMAC_VERSION;
 
 char *evm_config_xattrnames[] = {
 #ifdef CONFIG_SECURITY_SELINUX