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ecryptfs: use crypto_shash_tfm_digest()

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Instead of manually allocating a 'struct shash_desc' on the stack and
calling crypto_shash_digest(), switch to using the new helper function
crypto_shash_tfm_digest() which does this for us.

Cc: ecryptfs@vger.kernel.org
Signed-off-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Eric Biggers 2020-05-01 22:31:16 -07:00 committed by Herbert Xu
parent 3e185a56eb
commit 1979811388
1 changed files with 1 additions and 16 deletions
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17
fs/ecryptfs/crypto.c
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@ -48,18 +48,6 @@ void ecryptfs_from_hex(char *dst, char *src, int dst_size)
}
}
static int ecryptfs_hash_digest(struct crypto_shash *tfm,
char *src, int len, char *dst)
{
SHASH_DESC_ON_STACK(desc, tfm);
int err;
desc->tfm = tfm;
err = crypto_shash_digest(desc, src, len, dst);
shash_desc_zero(desc);
return err;
}
/**
* ecryptfs_calculate_md5 - calculates the md5 of @src
* @dst: Pointer to 16 bytes of allocated memory
@ -74,11 +62,8 @@ static int ecryptfs_calculate_md5(char *dst,
struct ecryptfs_crypt_stat *crypt_stat,
char *src, int len)
{
struct crypto_shash *tfm;
int rc = 0;
int rc = crypto_shash_tfm_digest(crypt_stat->hash_tfm, src, len, dst);
tfm = crypt_stat->hash_tfm;
rc = ecryptfs_hash_digest(tfm, src, len, dst);
if (rc) {
printk(KERN_ERR
"%s: Error computing crypto hash; rc = [%d]\n",