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crypto: ahash - Convert to new style algorithms

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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>
This commit is contained in:
Herbert Xu
2009-07-14 12:28:26 +08:00
parent 2ca33da1de
commit 88056ec346
5 changed files with 148 additions and 91 deletions
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82
crypto/ahash.c
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@@ -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 @@ static int ahash_nosetkey(struct crypto_ahash *tfm, const u8 *key,
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 @@ static int crypto_init_ahash_ops(struct crypto_tfm *tfm, u32 type, u32 mask)
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 @@ static void crypto_ahash_show(struct seq_file *m, struct crypto_alg *alg)
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");