crypto: ahash - Convert to new style algorithms
This patch converts crypto_ahash to the new style. The old ahash
algorithm type is retained until the existing ahash implementations
are also converted. All ahash users will automatically get the
new crypto_ahash type.
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
diff --git a/crypto/ahash.c b/crypto/ahash.c
index f347637..8385193 100644
--- a/crypto/ahash.c
+++ b/crypto/ahash.c
@@ -24,6 +24,12 @@
#include "internal.h"
+static inline struct ahash_alg *crypto_ahash_alg(struct crypto_ahash *hash)
+{
+ return container_of(crypto_hash_alg_common(hash), struct ahash_alg,
+ halg);
+}
+
static int hash_walk_next(struct crypto_hash_walk *walk)
{
unsigned int alignmask = walk->alignmask;
@@ -169,30 +175,11 @@
return -ENOSYS;
}
-int crypto_ahash_import(struct ahash_request *req, const u8 *in)
-{
- struct crypto_ahash *tfm = crypto_ahash_reqtfm(req);
- struct ahash_alg *alg = crypto_ahash_alg(tfm);
-
- memcpy(ahash_request_ctx(req), in, crypto_ahash_reqsize(tfm));
-
- if (alg->reinit)
- alg->reinit(req);
-
- return 0;
-}
-EXPORT_SYMBOL_GPL(crypto_ahash_import);
-
-static unsigned int crypto_ahash_ctxsize(struct crypto_alg *alg, u32 type,
- u32 mask)
-{
- return alg->cra_ctxsize;
-}
-
static int crypto_init_ahash_ops(struct crypto_tfm *tfm, u32 type, u32 mask)
{
- struct ahash_alg *alg = &tfm->__crt_alg->cra_ahash;
- struct ahash_tfm *crt = &tfm->crt_ahash;
+ struct old_ahash_alg *alg = &tfm->__crt_alg->cra_ahash;
+ struct crypto_ahash *crt = __crypto_ahash_cast(tfm);
+ struct ahash_alg *nalg = crypto_ahash_alg(crt);
if (alg->digestsize > PAGE_SIZE / 8)
return -EINVAL;
@@ -204,9 +191,42 @@
crt->setkey = alg->setkey ? ahash_setkey : ahash_nosetkey;
crt->digestsize = alg->digestsize;
+ nalg->setkey = alg->setkey;
+ nalg->halg.digestsize = alg->digestsize;
+
return 0;
}
+static int crypto_ahash_init_tfm(struct crypto_tfm *tfm)
+{
+ struct crypto_ahash *hash = __crypto_ahash_cast(tfm);
+ struct ahash_alg *alg = crypto_ahash_alg(hash);
+ struct old_ahash_alg *oalg = crypto_old_ahash_alg(hash);
+
+ if (tfm->__crt_alg->cra_type != &crypto_ahash_type)
+ return crypto_init_shash_ops_async(tfm);
+
+ if (oalg->init)
+ return crypto_init_ahash_ops(tfm, 0, 0);
+
+ hash->init = alg->init;
+ hash->update = alg->update;
+ hash->final = alg->final;
+ hash->digest = alg->digest;
+ hash->setkey = alg->setkey ? ahash_setkey : ahash_nosetkey;
+ hash->digestsize = alg->halg.digestsize;
+
+ return 0;
+}
+
+static unsigned int crypto_ahash_extsize(struct crypto_alg *alg)
+{
+ if (alg->cra_type == &crypto_ahash_type)
+ return alg->cra_ctxsize;
+
+ return sizeof(struct crypto_shash *);
+}
+
static void crypto_ahash_show(struct seq_file *m, struct crypto_alg *alg)
__attribute__ ((unused));
static void crypto_ahash_show(struct seq_file *m, struct crypto_alg *alg)
@@ -215,17 +235,29 @@
seq_printf(m, "async : %s\n", alg->cra_flags & CRYPTO_ALG_ASYNC ?
"yes" : "no");
seq_printf(m, "blocksize : %u\n", alg->cra_blocksize);
- seq_printf(m, "digestsize : %u\n", alg->cra_ahash.digestsize);
+ seq_printf(m, "digestsize : %u\n",
+ __crypto_hash_alg_common(alg)->digestsize);
}
const struct crypto_type crypto_ahash_type = {
- .ctxsize = crypto_ahash_ctxsize,
- .init = crypto_init_ahash_ops,
+ .extsize = crypto_ahash_extsize,
+ .init_tfm = crypto_ahash_init_tfm,
#ifdef CONFIG_PROC_FS
.show = crypto_ahash_show,
#endif
+ .maskclear = ~CRYPTO_ALG_TYPE_MASK,
+ .maskset = CRYPTO_ALG_TYPE_AHASH_MASK,
+ .type = CRYPTO_ALG_TYPE_AHASH,
+ .tfmsize = offsetof(struct crypto_ahash, base),
};
EXPORT_SYMBOL_GPL(crypto_ahash_type);
+struct crypto_ahash *crypto_alloc_ahash(const char *alg_name, u32 type,
+ u32 mask)
+{
+ return crypto_alloc_tfm(alg_name, &crypto_ahash_type, type, mask);
+}
+EXPORT_SYMBOL_GPL(crypto_alloc_ahash);
+
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("Asynchronous cryptographic hash type");