dmaengine, async_tx: support alignment checks

[safe/jmp/linux-2.6] / crypto / shash.c

diff --git a/crypto/shash.c b/crypto/shash.c
index 50d69a4..2ccc8b0 100644 (file)
--- a/crypto/shash.c
+++ b/crypto/shash.c
@@ -18,15 +18,10 @@
 #include <linux/slab.h>
 #include <linux/seq_file.h>
 
-static const struct crypto_type crypto_shash_type;
-
-static inline struct crypto_shash *__crypto_shash_cast(struct crypto_tfm *tfm)
-{
-       return container_of(tfm, struct crypto_shash, base);
-}
-
 #include "internal.h"
 
+static const struct crypto_type crypto_shash_type;
+
 static int shash_setkey_unaligned(struct crypto_shash *tfm, const u8 *key,
                                  unsigned int keylen)
 {
@@ -55,6 +50,9 @@ int crypto_shash_setkey(struct crypto_shash *tfm, const u8 *key,
        struct shash_alg *shash = crypto_shash_alg(tfm);
        unsigned long alignmask = crypto_shash_alignmask(tfm);
 
+       if (!shash->setkey)
+               return -ENOSYS;
+
        if ((unsigned long)key & alignmask)
                return shash_setkey_unaligned(tfm, key, keylen);
 
@@ -79,6 +77,9 @@ static int shash_update_unaligned(struct shash_desc *desc, const u8 *data,
        u8 buf[shash_align_buffer_size(unaligned_len, alignmask)]
                __attribute__ ((aligned));
 
+       if (unaligned_len > len)
+               unaligned_len = len;
+
        memcpy(buf, data, unaligned_len);
 
        return shash->update(desc, buf, unaligned_len) ?:
@@ -279,8 +280,7 @@ static int crypto_init_shash_ops_async(struct crypto_tfm *tfm)
        if (!crypto_mod_get(calg))
                return -EAGAIN;
 
-       shash = __crypto_shash_cast(crypto_create_tfm(
-               calg, &crypto_shash_type));
+       shash = crypto_create_tfm(calg, &crypto_shash_type);
        if (IS_ERR(shash)) {
                crypto_mod_put(calg);
                return PTR_ERR(shash);
@@ -385,10 +385,14 @@ static int crypto_init_shash_ops_compat(struct crypto_tfm *tfm)
        struct shash_desc *desc = crypto_tfm_ctx(tfm);
        struct crypto_shash *shash;
 
-       shash = __crypto_shash_cast(crypto_create_tfm(
-               calg, &crypto_shash_type));
-       if (IS_ERR(shash))
+       if (!crypto_mod_get(calg))
+               return -EAGAIN;
+
+       shash = crypto_create_tfm(calg, &crypto_shash_type);
+       if (IS_ERR(shash)) {
+               crypto_mod_put(calg);
                return PTR_ERR(shash);
+       }
 
        desc->tfm = shash;
        tfm->exit = crypto_exit_shash_ops_compat;
@@ -434,8 +438,6 @@ static unsigned int crypto_shash_ctxsize(struct crypto_alg *alg, u32 type,
 static int crypto_shash_init_tfm(struct crypto_tfm *tfm,
                                 const struct crypto_type *frontend)
 {
-       if (frontend->type != CRYPTO_ALG_TYPE_SHASH)
-               return -EINVAL;
        return 0;
 }
 
@@ -474,8 +476,7 @@ static const struct crypto_type crypto_shash_type = {
 struct crypto_shash *crypto_alloc_shash(const char *alg_name, u32 type,
                                        u32 mask)
 {
-       return __crypto_shash_cast(
-               crypto_alloc_tfm(alg_name, &crypto_shash_type, type, mask));
+       return crypto_alloc_tfm(alg_name, &crypto_shash_type, type, mask);
 }
 EXPORT_SYMBOL_GPL(crypto_alloc_shash);