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| author | Huang Ying <ying.huang@intel.com> | 2009-01-18 16:19:46 +1100 |
|---|---|---|
| committer | Herbert Xu <herbert@gondor.apana.org.au> | 2009-02-18 16:48:05 +0800 |
| commit | 1cac2cbc76b9f3fce0d4ccc374e724e7f2533a47 (patch) | |
| tree | ea54d0d42ca3775a57620cb3c4c115e15d96d9a3 /crypto/cryptd.c | |
| parent | 1693531e9ef11959300617c68a8322ad006b5475 (diff) | |
| download | lwn-1cac2cbc76b9f3fce0d4ccc374e724e7f2533a47.tar.gz lwn-1cac2cbc76b9f3fce0d4ccc374e724e7f2533a47.zip | |
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>
Diffstat (limited to 'crypto/cryptd.c')
| -rw-r--r-- | crypto/cryptd.c | 35 |
1 files changed, 35 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 @@ #include <crypto/algapi.h> #include <crypto/internal/hash.h> +#include <crypto/cryptd.h> #include <linux/err.h> #include <linux/init.h> #include <linux/kernel.h> @@ -537,6 +538,40 @@ static struct crypto_template cryptd_tmpl = { .module = THIS_MODULE, }; +struct cryptd_ablkcipher *cryptd_alloc_ablkcipher(const char *alg_name, + u32 type, u32 mask) +{ + char cryptd_alg_name[CRYPTO_MAX_ALG_NAME]; + struct crypto_ablkcipher *tfm; + + if (snprintf(cryptd_alg_name, CRYPTO_MAX_ALG_NAME, + "cryptd(%s)", alg_name) >= CRYPTO_MAX_ALG_NAME) + return ERR_PTR(-EINVAL); + tfm = crypto_alloc_ablkcipher(cryptd_alg_name, type, mask); + if (IS_ERR(tfm)) + return ERR_CAST(tfm); + if (crypto_ablkcipher_tfm(tfm)->__crt_alg->cra_module != THIS_MODULE) { + crypto_free_ablkcipher(tfm); + return ERR_PTR(-EINVAL); + } + + return __cryptd_ablkcipher_cast(tfm); +} +EXPORT_SYMBOL_GPL(cryptd_alloc_ablkcipher); + +struct crypto_blkcipher *cryptd_ablkcipher_child(struct cryptd_ablkcipher *tfm) +{ + struct cryptd_blkcipher_ctx *ctx = crypto_ablkcipher_ctx(&tfm->base); + return ctx->child; +} +EXPORT_SYMBOL_GPL(cryptd_ablkcipher_child); + +void cryptd_free_ablkcipher(struct cryptd_ablkcipher *tfm) +{ + crypto_free_ablkcipher(&tfm->base); +} +EXPORT_SYMBOL_GPL(cryptd_free_ablkcipher); + static inline int cryptd_create_thread(struct cryptd_state *state, int (*fn)(void *data), const char *name) { |