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authorLinus Torvalds <torvalds@linux-foundation.org>2013-02-21 08:18:12 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2013-02-21 08:18:12 -0800
commit33673dcb372b5d8179c22127ca71deb5f3dc7016 (patch)
treed182e9dc6aa127375a92b5eb619d6cd2ddc23ce7 /security/integrity/evm
parentfe9453a1dcb5fb146f9653267e78f4a558066f6f (diff)
parent5b2660326039a32b28766cb4c1a8b1bdcfadc375 (diff)
downloadop-kernel-dev-33673dcb372b5d8179c22127ca71deb5f3dc7016.zip
op-kernel-dev-33673dcb372b5d8179c22127ca71deb5f3dc7016.tar.gz
Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security
Pull security subsystem updates from James Morris: "This is basically a maintenance update for the TPM driver and EVM/IMA" Fix up conflicts in lib/digsig.c and security/integrity/ima/ima_main.c * 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security: (45 commits) tpm/ibmvtpm: build only when IBM pseries is configured ima: digital signature verification using asymmetric keys ima: rename hash calculation functions ima: use new crypto_shash API instead of old crypto_hash ima: add policy support for file system uuid evm: add file system uuid to EVM hmac tpm_tis: check pnp_acpi_device return code char/tpm/tpm_i2c_stm_st33: drop temporary variable for return value char/tpm/tpm_i2c_stm_st33: remove dead assignment in tpm_st33_i2c_probe char/tpm/tpm_i2c_stm_st33: Remove __devexit attribute char/tpm/tpm_i2c_stm_st33: Don't use memcpy for one byte assignment tpm_i2c_stm_st33: removed unused variables/code TPM: Wait for TPM_ACCESS tpmRegValidSts to go high at startup tpm: Fix cancellation of TPM commands (interrupt mode) tpm: Fix cancellation of TPM commands (polling mode) tpm: Store TPM vendor ID TPM: Work around buggy TPMs that block during continue self test tpm_i2c_stm_st33: fix oops when i2c client is unavailable char/tpm: Use struct dev_pm_ops for power management TPM: STMicroelectronics ST33 I2C BUILD STUFF ...
Diffstat (limited to 'security/integrity/evm')
-rw-r--r--security/integrity/evm/Kconfig13
-rw-r--r--security/integrity/evm/evm.h2
-rw-r--r--security/integrity/evm/evm_crypto.c3
-rw-r--r--security/integrity/evm/evm_main.c10
-rw-r--r--security/integrity/evm/evm_secfs.c6
5 files changed, 18 insertions, 16 deletions
diff --git a/security/integrity/evm/Kconfig b/security/integrity/evm/Kconfig
index afbb59d..fea9749 100644
--- a/security/integrity/evm/Kconfig
+++ b/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/security/integrity/evm/evm.h b/security/integrity/evm/evm.h
index c885247..30bd1ec 100644
--- a/security/integrity/evm/evm.h
+++ b/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;
@@ -45,6 +46,5 @@ extern int evm_calc_hash(struct dentry *dentry, const char *req_xattr_name,
extern int evm_init_hmac(struct inode *inode, const struct xattr *xattr,
char *hmac_val);
extern int evm_init_secfs(void);
-extern void evm_cleanup_secfs(void);
#endif
diff --git a/security/integrity/evm/evm_crypto.c b/security/integrity/evm/evm_crypto.c
index 7dd538e..3bab89e 100644
--- a/security/integrity/evm/evm_crypto.c
+++ b/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/security/integrity/evm/evm_main.c b/security/integrity/evm/evm_main.c
index eb54845..cdbde17 100644
--- a/security/integrity/evm/evm_main.c
+++ b/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
@@ -427,15 +428,6 @@ err:
return error;
}
-static void __exit cleanup_evm(void)
-{
- evm_cleanup_secfs();
- if (hmac_tfm)
- crypto_free_shash(hmac_tfm);
- if (hash_tfm)
- crypto_free_shash(hash_tfm);
-}
-
/*
* evm_display_config - list the EVM protected security extended attributes
*/
diff --git a/security/integrity/evm/evm_secfs.c b/security/integrity/evm/evm_secfs.c
index ac76299..30f670a 100644
--- a/security/integrity/evm/evm_secfs.c
+++ b/security/integrity/evm/evm_secfs.c
@@ -100,9 +100,3 @@ int __init evm_init_secfs(void)
error = -EFAULT;
return error;
}
-
-void __exit evm_cleanup_secfs(void)
-{
- if (evm_init_tpm)
- securityfs_remove(evm_init_tpm);
-}
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