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Diffstat (limited to 'crypto/ahash.c')
-rw-r--r--crypto/ahash.c42
1 files changed, 26 insertions, 16 deletions
diff --git a/crypto/ahash.c b/crypto/ahash.c
index 5d320a811f75..81e2767e2164 100644
--- a/crypto/ahash.c
+++ b/crypto/ahash.c
@@ -86,17 +86,17 @@ static int hash_walk_new_entry(struct crypto_hash_walk *walk)
int crypto_hash_walk_done(struct crypto_hash_walk *walk, int err)
{
unsigned int alignmask = walk->alignmask;
- unsigned int nbytes = walk->entrylen;
walk->data -= walk->offset;
- if (nbytes && walk->offset & alignmask && !err) {
- walk->offset = ALIGN(walk->offset, alignmask + 1);
- nbytes = min(nbytes,
- ((unsigned int)(PAGE_SIZE)) - walk->offset);
- walk->entrylen -= nbytes;
+ if (walk->entrylen && (walk->offset & alignmask) && !err) {
+ unsigned int nbytes;
+ walk->offset = ALIGN(walk->offset, alignmask + 1);
+ nbytes = min(walk->entrylen,
+ (unsigned int)(PAGE_SIZE - walk->offset));
if (nbytes) {
+ walk->entrylen -= nbytes;
walk->data += walk->offset;
return nbytes;
}
@@ -116,7 +116,7 @@ int crypto_hash_walk_done(struct crypto_hash_walk *walk, int err)
if (err)
return err;
- if (nbytes) {
+ if (walk->entrylen) {
walk->offset = 0;
walk->pg++;
return hash_walk_next(walk);
@@ -190,6 +190,21 @@ static int ahash_setkey_unaligned(struct crypto_ahash *tfm, const u8 *key,
return ret;
}
+static int ahash_nosetkey(struct crypto_ahash *tfm, const u8 *key,
+ unsigned int keylen)
+{
+ return -ENOSYS;
+}
+
+static void ahash_set_needkey(struct crypto_ahash *tfm)
+{
+ const struct hash_alg_common *alg = crypto_hash_alg_common(tfm);
+
+ if (tfm->setkey != ahash_nosetkey &&
+ !(alg->base.cra_flags & CRYPTO_ALG_OPTIONAL_KEY))
+ crypto_ahash_set_flags(tfm, CRYPTO_TFM_NEED_KEY);
+}
+
int crypto_ahash_setkey(struct crypto_ahash *tfm, const u8 *key,
unsigned int keylen)
{
@@ -201,20 +216,16 @@ int crypto_ahash_setkey(struct crypto_ahash *tfm, const u8 *key,
else
err = tfm->setkey(tfm, key, keylen);
- if (err)
+ if (unlikely(err)) {
+ ahash_set_needkey(tfm);
return err;
+ }
crypto_ahash_clear_flags(tfm, CRYPTO_TFM_NEED_KEY);
return 0;
}
EXPORT_SYMBOL_GPL(crypto_ahash_setkey);
-static int ahash_nosetkey(struct crypto_ahash *tfm, const u8 *key,
- unsigned int keylen)
-{
- return -ENOSYS;
-}
-
static inline unsigned int ahash_align_buffer_size(unsigned len,
unsigned long mask)
{
@@ -489,8 +500,7 @@ static int crypto_ahash_init_tfm(struct crypto_tfm *tfm)
if (alg->setkey) {
hash->setkey = alg->setkey;
- if (!(alg->halg.base.cra_flags & CRYPTO_ALG_OPTIONAL_KEY))
- crypto_ahash_set_flags(hash, CRYPTO_TFM_NEED_KEY);
+ ahash_set_needkey(hash);
}
return 0;