From: Huang Ying Subject: [PATCH crypto -v4 1/2] AES-NI: Add support to access underlying blkcipher under cryptd ablkcipher Date: Thu, 15 Jan 2009 16:28:33 +0800 Message-ID: <1232008113.5937.199.camel@yhuang-dev.sh.intel.com> Mime-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="=-NFsqTVtTOo3iHRL2zHfp" Cc: Sebastian Siewior , linux-kernel@vger.kernel.org, linux-crypto@vger.kernel.org To: Herbert Xu Return-path: Received: from mga11.intel.com ([192.55.52.93]:58402 "EHLO mga11.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756923AbZAOI2s (ORCPT ); Thu, 15 Jan 2009 03:28:48 -0500 Sender: linux-crypto-owner@vger.kernel.org List-ID: --=-NFsqTVtTOo3iHRL2zHfp Content-Type: text/plain Content-Transfer-Encoding: quoted-printable 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 --- crypto/cryptd.c | 30 ++++++++++++++++++++++++++++++ include/crypto/algapi.h | 16 ++++++++++++++++ 2 files changed, 46 insertions(+) --- a/crypto/cryptd.c +++ b/crypto/cryptd.c @@ -537,6 +537,36 @@ static struct crypto_template cryptd_tmp .module =3D THIS_MODULE, }; =20 +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) >=3D CRYPTO_MAX_ALG_NAME) + return ERR_PTR(-EINVAL); + tfm =3D crypto_alloc_ablkcipher(cryptd_alg_name, type, mask); + BUG_ON(crypto_ablkcipher_tfm(tfm)->__crt_alg->cra_module !=3D + THIS_MODULE); + + 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 =3D 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) { --- a/include/crypto/algapi.h +++ b/include/crypto/algapi.h @@ -94,6 +94,10 @@ struct blkcipher_walk { unsigned int blocksize; }; =20 +struct cryptd_ablkcipher { + struct crypto_ablkcipher base; +}; + extern const struct crypto_type crypto_ablkcipher_type; extern const struct crypto_type crypto_aead_type; extern const struct crypto_type crypto_blkcipher_type; @@ -145,6 +149,18 @@ int blkcipher_walk_virt_block(struct blk struct blkcipher_walk *walk, unsigned int blocksize); =20 +static inline struct cryptd_ablkcipher *__cryptd_ablkcipher_cast( + struct crypto_ablkcipher *tfm) +{ + return (struct cryptd_ablkcipher *)tfm; +} + +/* alg_name should be algorithm to be cryptd-ed */ +struct cryptd_ablkcipher *cryptd_alloc_ablkcipher(const char *alg_name, + u32 type, u32 mask); +struct crypto_blkcipher *cryptd_ablkcipher_child(struct cryptd_ablkcipher = *tfm); +void cryptd_free_ablkcipher(struct cryptd_ablkcipher *tfm); + static inline void *crypto_tfm_ctx_aligned(struct crypto_tfm *tfm) { unsigned long addr =3D (unsigned long)crypto_tfm_ctx(tfm); --=-NFsqTVtTOo3iHRL2zHfp Content-Type: application/pgp-signature; name=signature.asc Content-Description: This is a digitally signed message part -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.9 (GNU/Linux) iEYEABECAAYFAklu860ACgkQKhFGF+eHlphHvwCffdN2xpP/qRzW/MaPEOpWmSFT glgAmwcA1x5G9deCQ/cacGD+X/wHS6Ps =xfBZ -----END PGP SIGNATURE----- --=-NFsqTVtTOo3iHRL2zHfp--