aboutsummaryrefslogtreecommitdiffstats
diff options
context:
space:
mode:
authorHuang Ying <ying.huang@intel.com>2009-01-18 00:19:46 -0500
committerHerbert Xu <herbert@gondor.apana.org.au>2009-02-18 03:48:05 -0500
commit1cac2cbc76b9f3fce0d4ccc374e724e7f2533a47 (patch)
treeea54d0d42ca3775a57620cb3c4c115e15d96d9a3
parent1693531e9ef11959300617c68a8322ad006b5475 (diff)
crypto: cryptd - Add support to access underlying blkcipher
cryptd_alloc_ablkcipher() will allocate a cryptd-ed ablkcipher for specified algorithm name. The new allocated one is guaranteed to be cryptd-ed ablkcipher, so the blkcipher underlying can be gotten via cryptd_ablkcipher_child(). Signed-off-by: Huang Ying <ying.huang@intel.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
-rw-r--r--crypto/cryptd.c35
-rw-r--r--include/crypto/cryptd.h27
2 files changed, 62 insertions, 0 deletions
diff --git a/crypto/cryptd.c b/crypto/cryptd.c
index d29e06b350ff..93b98c525b3a 100644
--- a/crypto/cryptd.c
+++ b/crypto/cryptd.c
@@ -12,6 +12,7 @@
12 12
13#include <crypto/algapi.h> 13#include <crypto/algapi.h>
14#include <crypto/internal/hash.h> 14#include <crypto/internal/hash.h>
15#include <crypto/cryptd.h>
15#include <linux/err.h> 16#include <linux/err.h>
16#include <linux/init.h> 17#include <linux/init.h>
17#include <linux/kernel.h> 18#include <linux/kernel.h>
@@ -537,6 +538,40 @@ static struct crypto_template cryptd_tmpl = {
537 .module = THIS_MODULE, 538 .module = THIS_MODULE,
538}; 539};
539 540
541struct cryptd_ablkcipher *cryptd_alloc_ablkcipher(const char *alg_name,
542 u32 type, u32 mask)
543{
544 char cryptd_alg_name[CRYPTO_MAX_ALG_NAME];
545 struct crypto_ablkcipher *tfm;
546
547 if (snprintf(cryptd_alg_name, CRYPTO_MAX_ALG_NAME,
548 "cryptd(%s)", alg_name) >= CRYPTO_MAX_ALG_NAME)
549 return ERR_PTR(-EINVAL);
550 tfm = crypto_alloc_ablkcipher(cryptd_alg_name, type, mask);
551 if (IS_ERR(tfm))
552 return ERR_CAST(tfm);
553 if (crypto_ablkcipher_tfm(tfm)->__crt_alg->cra_module != THIS_MODULE) {
554 crypto_free_ablkcipher(tfm);
555 return ERR_PTR(-EINVAL);
556 }
557
558 return __cryptd_ablkcipher_cast(tfm);
559}
560EXPORT_SYMBOL_GPL(cryptd_alloc_ablkcipher);
561
562struct crypto_blkcipher *cryptd_ablkcipher_child(struct cryptd_ablkcipher *tfm)
563{
564 struct cryptd_blkcipher_ctx *ctx = crypto_ablkcipher_ctx(&tfm->base);
565 return ctx->child;
566}
567EXPORT_SYMBOL_GPL(cryptd_ablkcipher_child);
568
569void cryptd_free_ablkcipher(struct cryptd_ablkcipher *tfm)
570{
571 crypto_free_ablkcipher(&tfm->base);
572}
573EXPORT_SYMBOL_GPL(cryptd_free_ablkcipher);
574
540static inline int cryptd_create_thread(struct cryptd_state *state, 575static inline int cryptd_create_thread(struct cryptd_state *state,
541 int (*fn)(void *data), const char *name) 576 int (*fn)(void *data), const char *name)
542{ 577{
diff --git a/include/crypto/cryptd.h b/include/crypto/cryptd.h
new file mode 100644
index 000000000000..55fa7bbdbc71
--- /dev/null
+++ b/include/crypto/cryptd.h
@@ -0,0 +1,27 @@
1/*
2 * Software async crypto daemon
3 */
4
5#ifndef _CRYPTO_CRYPT_H
6#define _CRYPTO_CRYPT_H
7
8#include <linux/crypto.h>
9#include <linux/kernel.h>
10
11struct cryptd_ablkcipher {
12 struct crypto_ablkcipher base;
13};
14
15static inline struct cryptd_ablkcipher *__cryptd_ablkcipher_cast(
16 struct crypto_ablkcipher *tfm)
17{
18 return (struct cryptd_ablkcipher *)tfm;
19}
20
21/* alg_name should be algorithm to be cryptd-ed */
22struct cryptd_ablkcipher *cryptd_alloc_ablkcipher(const char *alg_name,
23 u32 type, u32 mask);
24struct crypto_blkcipher *cryptd_ablkcipher_child(struct cryptd_ablkcipher *tfm);
25void cryptd_free_ablkcipher(struct cryptd_ablkcipher *tfm);
26
27#endif