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Merge branch 'next' into for-linus

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Conflicts:
	security/integrity/evm/evm_crypto.c

Resolved upstream fix vs. next conflict manually.

Signed-off-by: James Morris <jmorris@namei.org>
This commit is contained in:
James Morris
2012-01-09 12:16:48 +11:00
parent 805a6af8db 7b7e5916aa
commit 8fcc995495
59 changed files with 7027 additions and 144 deletions
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76
security/integrity/evm/evm_crypto.c
View File

@@ -26,44 +26,56 @@ static unsigned char evmkey[MAX_KEY_SIZE];
static int evmkey_len = MAX_KEY_SIZE;
struct crypto_shash *hmac_tfm;
struct crypto_shash *hash_tfm;
static DEFINE_MUTEX(mutex);
static struct shash_desc *init_desc(void)
static struct shash_desc *init_desc(char type)
{
int rc;
long rc;
char *algo;
struct crypto_shash **tfm;
struct shash_desc *desc;
if (hmac_tfm == NULL) {
if (type == EVM_XATTR_HMAC) {
tfm = &hmac_tfm;
algo = evm_hmac;
} else {
tfm = &hash_tfm;
algo = evm_hash;
}
if (*tfm == NULL) {
mutex_lock(&mutex);
if (hmac_tfm)
if (*tfm)
goto out;
hmac_tfm = crypto_alloc_shash(evm_hmac, 0, CRYPTO_ALG_ASYNC);
if (IS_ERR(hmac_tfm)) {
pr_err("Can not allocate %s (reason: %ld)\n",
evm_hmac, PTR_ERR(hmac_tfm));
rc = PTR_ERR(hmac_tfm);
hmac_tfm = NULL;
*tfm = crypto_alloc_shash(algo, 0, CRYPTO_ALG_ASYNC);
if (IS_ERR(*tfm)) {
rc = PTR_ERR(*tfm);
pr_err("Can not allocate %s (reason: %ld)\n", algo, rc);
*tfm = NULL;
mutex_unlock(&mutex);
return ERR_PTR(rc);
}
rc = crypto_shash_setkey(hmac_tfm, evmkey, evmkey_len);
if (rc) {
crypto_free_shash(hmac_tfm);
hmac_tfm = NULL;
mutex_unlock(&mutex);
return ERR_PTR(rc);
if (type == EVM_XATTR_HMAC) {
rc = crypto_shash_setkey(*tfm, evmkey, evmkey_len);
if (rc) {
crypto_free_shash(*tfm);
*tfm = NULL;
mutex_unlock(&mutex);
return ERR_PTR(rc);
}
}
out:
mutex_unlock(&mutex);
}
desc = kmalloc(sizeof(*desc) + crypto_shash_descsize(hmac_tfm),
desc = kmalloc(sizeof(*desc) + crypto_shash_descsize(*tfm),
GFP_KERNEL);
if (!desc)
return ERR_PTR(-ENOMEM);
desc->tfm = hmac_tfm;
desc->tfm = *tfm;
desc->flags = CRYPTO_TFM_REQ_MAY_SLEEP;
rc = crypto_shash_init(desc);
@@ -108,9 +120,11 @@ static void hmac_add_misc(struct shash_desc *desc, struct inode *inode,
* the hmac using the requested xattr value. Don't alloc/free memory for
* each xattr, but attempt to re-use the previously allocated memory.
*/
int evm_calc_hmac(struct dentry *dentry, const char *req_xattr_name,
const char *req_xattr_value, size_t req_xattr_value_len,
char *digest)
static int evm_calc_hmac_or_hash(struct dentry *dentry,
const char *req_xattr_name,
const char *req_xattr_value,
size_t req_xattr_value_len,
char type, char *digest)
{
struct inode *inode = dentry->d_inode;
struct shash_desc *desc;
@@ -122,7 +136,7 @@ int evm_calc_hmac(struct dentry *dentry, const char *req_xattr_name,
if (!inode->i_op || !inode->i_op->getxattr)
return -EOPNOTSUPP;
desc = init_desc();
desc = init_desc(type);
if (IS_ERR(desc))
return PTR_ERR(desc);
@@ -156,6 +170,22 @@ out:
return error;
}
int evm_calc_hmac(struct dentry *dentry, const char *req_xattr_name,
const char *req_xattr_value, size_t req_xattr_value_len,
char *digest)
{
return evm_calc_hmac_or_hash(dentry, req_xattr_name, req_xattr_value,
req_xattr_value_len, EVM_XATTR_HMAC, digest);
}
int evm_calc_hash(struct dentry *dentry, const char *req_xattr_name,
const char *req_xattr_value, size_t req_xattr_value_len,
char *digest)
{
return evm_calc_hmac_or_hash(dentry, req_xattr_name, req_xattr_value,
req_xattr_value_len, IMA_XATTR_DIGEST, digest);
}
/*
* Calculate the hmac and update security.evm xattr
*
@@ -186,7 +216,7 @@ int evm_init_hmac(struct inode *inode, const struct xattr *lsm_xattr,
{
struct shash_desc *desc;
desc = init_desc();
desc = init_desc(EVM_XATTR_HMAC);
if (IS_ERR(desc)) {
printk(KERN_INFO "init_desc failed\n");
return PTR_ERR(desc);