diff options
| -rw-r--r-- | crypto/ctr.c | 173 | ||||
| -rw-r--r-- | crypto/tcrypt.c | 4 | ||||
| -rw-r--r-- | crypto/tcrypt.h | 1 |
3 files changed, 115 insertions, 63 deletions
diff --git a/crypto/ctr.c b/crypto/ctr.c index 4ca7222..1f2997c 100644 --- a/crypto/ctr.c +++ b/crypto/ctr.c @@ -12,6 +12,7 @@ #include <crypto/algapi.h> #include <crypto/ctr.h> +#include <crypto/internal/skcipher.h> #include <linux/err.h> #include <linux/init.h> #include <linux/kernel.h> @@ -25,10 +26,15 @@ struct crypto_ctr_ctx { }; struct crypto_rfc3686_ctx { - struct crypto_blkcipher *child; + struct crypto_ablkcipher *child; u8 nonce[CTR_RFC3686_NONCE_SIZE]; }; +struct crypto_rfc3686_req_ctx { + u8 iv[CTR_RFC3686_BLOCK_SIZE]; + struct ablkcipher_request subreq CRYPTO_MINALIGN_ATTR; +}; + static int crypto_ctr_setkey(struct crypto_tfm *parent, const u8 *key, unsigned int keylen) { @@ -243,11 +249,11 @@ static struct crypto_template crypto_ctr_tmpl = { .module = THIS_MODULE, }; -static int crypto_rfc3686_setkey(struct crypto_tfm *parent, const u8 *key, - unsigned int keylen) +static int crypto_rfc3686_setkey(struct crypto_ablkcipher *parent, + const u8 *key, unsigned int keylen) { - struct crypto_rfc3686_ctx *ctx = crypto_tfm_ctx(parent); - struct crypto_blkcipher *child = ctx->child; + struct crypto_rfc3686_ctx *ctx = crypto_ablkcipher_ctx(parent); + struct crypto_ablkcipher *child = ctx->child; int err; /* the nonce is stored in bytes at end of key */ @@ -259,59 +265,64 @@ static int crypto_rfc3686_setkey(struct crypto_tfm *parent, const u8 *key, keylen -= CTR_RFC3686_NONCE_SIZE; - crypto_blkcipher_clear_flags(child, CRYPTO_TFM_REQ_MASK); - crypto_blkcipher_set_flags(child, crypto_tfm_get_flags(parent) & - CRYPTO_TFM_REQ_MASK); - err = crypto_blkcipher_setkey(child, key, keylen); - crypto_tfm_set_flags(parent, crypto_blkcipher_get_flags(child) & - CRYPTO_TFM_RES_MASK); + crypto_ablkcipher_clear_flags(child, CRYPTO_TFM_REQ_MASK); + crypto_ablkcipher_set_flags(child, crypto_ablkcipher_get_flags(parent) & + CRYPTO_TFM_REQ_MASK); + err = crypto_ablkcipher_setkey(child, key, keylen); + crypto_ablkcipher_set_flags(parent, crypto_ablkcipher_get_flags(child) & + CRYPTO_TFM_RES_MASK); return err; } -static int crypto_rfc3686_crypt(struct blkcipher_desc *desc, - struct scatterlist *dst, - struct scatterlist *src, unsigned int nbytes) +static int crypto_rfc3686_crypt(struct ablkcipher_request *req) { - struct crypto_blkcipher *tfm = desc->tfm; - struct crypto_rfc3686_ctx *ctx = crypto_blkcipher_ctx(tfm); - struct crypto_blkcipher *child = ctx->child; - unsigned long alignmask = crypto_blkcipher_alignmask(tfm); - u8 ivblk[CTR_RFC3686_BLOCK_SIZE + alignmask]; - u8 *iv = PTR_ALIGN(ivblk + 0, alignmask + 1); - u8 *info = desc->info; - int err; + struct crypto_ablkcipher *tfm = crypto_ablkcipher_reqtfm(req); + struct crypto_rfc3686_ctx *ctx = crypto_ablkcipher_ctx(tfm); + struct crypto_ablkcipher *child = ctx->child; + unsigned long align = crypto_ablkcipher_alignmask(tfm); + struct crypto_rfc3686_req_ctx *rctx = + (void *)PTR_ALIGN((u8 *)ablkcipher_request_ctx(req), align + 1); + struct ablkcipher_request *subreq = &rctx->subreq; + u8 *iv = rctx->iv; /* set up counter block */ memcpy(iv, ctx->nonce, CTR_RFC3686_NONCE_SIZE); - memcpy(iv + CTR_RFC3686_NONCE_SIZE, info, CTR_RFC3686_IV_SIZE); + memcpy(iv + CTR_RFC3686_NONCE_SIZE, req->info, CTR_RFC3686_IV_SIZE); /* initialize counter portion of counter block */ *(__be32 *)(iv + CTR_RFC3686_NONCE_SIZE + CTR_RFC3686_IV_SIZE) = cpu_to_be32(1); - desc->tfm = child; - desc->info = iv; - err = crypto_blkcipher_encrypt_iv(desc, dst, src, nbytes); - desc->tfm = tfm; - desc->info = info; + ablkcipher_request_set_tfm(subreq, child); + ablkcipher_request_set_callback(subreq, req->base.flags, + req->base.complete, req->base.data); + ablkcipher_request_set_crypt(subreq, req->src, req->dst, req->nbytes, + iv); - return err; + return crypto_ablkcipher_encrypt(subreq); } static int crypto_rfc3686_init_tfm(struct crypto_tfm *tfm) { struct crypto_instance *inst = (void *)tfm->__crt_alg; - struct crypto_spawn *spawn = crypto_instance_ctx(inst); + struct crypto_skcipher_spawn *spawn = crypto_instance_ctx(inst); struct crypto_rfc3686_ctx *ctx = crypto_tfm_ctx(tfm); - struct crypto_blkcipher *cipher; + struct crypto_ablkcipher *cipher; + unsigned long align; - cipher = crypto_spawn_blkcipher(spawn); + cipher = crypto_spawn_skcipher(spawn); if (IS_ERR(cipher)) return PTR_ERR(cipher); ctx->child = cipher; + align = crypto_tfm_alg_alignmask(tfm); + align &= ~(crypto_tfm_ctx_alignment() - 1); + tfm->crt_ablkcipher.reqsize = align + + sizeof(struct crypto_rfc3686_req_ctx) + + crypto_ablkcipher_reqsize(cipher); + return 0; } @@ -319,74 +330,110 @@ static void crypto_rfc3686_exit_tfm(struct crypto_tfm *tfm) { struct crypto_rfc3686_ctx *ctx = crypto_tfm_ctx(tfm); - crypto_free_blkcipher(ctx->child); + crypto_free_ablkcipher(ctx->child); } static struct crypto_instance *crypto_rfc3686_alloc(struct rtattr **tb) { + struct crypto_attr_type *algt; struct crypto_instance *inst; struct crypto_alg *alg; + struct crypto_skcipher_spawn *spawn; + const char *cipher_name; int err; - err = crypto_check_attr_type(tb, CRYPTO_ALG_TYPE_BLKCIPHER); - if (err) + algt = crypto_get_attr_type(tb); + err = PTR_ERR(algt); + if (IS_ERR(algt)) return ERR_PTR(err); - alg = crypto_attr_alg(tb[1], CRYPTO_ALG_TYPE_BLKCIPHER, - CRYPTO_ALG_TYPE_MASK); - err = PTR_ERR(alg); - if (IS_ERR(alg)) + if ((algt->type ^ CRYPTO_ALG_TYPE_BLKCIPHER) & algt->mask) + return ERR_PTR(-EINVAL); + + cipher_name = crypto_attr_alg_name(tb[1]); + err = PTR_ERR(cipher_name); + if (IS_ERR(cipher_name)) return ERR_PTR(err); + inst = kzalloc(sizeof(*inst) + sizeof(*spawn), GFP_KERNEL); + if (!inst) + return ERR_PTR(-ENOMEM); + + spawn = crypto_instance_ctx(inst); + + crypto_set_skcipher_spawn(spawn, inst); + err = crypto_grab_skcipher(spawn, cipher_name, 0, + crypto_requires_sync(algt->type, + algt->mask)); + if (err) + goto err_free_inst; + + alg = crypto_skcipher_spawn_alg(spawn); + /* We only support 16-byte blocks. */ err = -EINVAL; - if (alg->cra_blkcipher.ivsize != CTR_RFC3686_BLOCK_SIZE) - goto out_put_alg; + if (alg->cra_ablkcipher.ivsize != CTR_RFC3686_BLOCK_SIZE) + goto err_drop_spawn; /* Not a stream cipher? */ if (alg->cra_blocksize != 1) - goto out_put_alg; + goto err_drop_spawn; - inst = crypto_alloc_instance("rfc3686", alg); - if (IS_ERR(inst)) - goto out; + err = -ENAMETOOLONG; + if (snprintf(inst->alg.cra_name, CRYPTO_MAX_ALG_NAME, "rfc3686(%s)", + alg->cra_name) >= CRYPTO_MAX_ALG_NAME) + goto err_drop_spawn; + if (snprintf(inst->alg.cra_driver_name, CRYPTO_MAX_ALG_NAME, + "rfc3686(%s)", alg->cra_driver_name) >= + CRYPTO_MAX_ALG_NAME) + goto err_drop_spawn; - inst->alg.cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER; inst->alg.cra_priority = alg->cra_priority; inst->alg.cra_blocksize = 1; inst->alg.cra_alignmask = alg->cra_alignmask; - inst->alg.cra_type = &crypto_blkcipher_type; - inst->alg.cra_blkcipher.ivsize = CTR_RFC3686_IV_SIZE; - inst->alg.cra_blkcipher.min_keysize = alg->cra_blkcipher.min_keysize - + CTR_RFC3686_NONCE_SIZE; - inst->alg.cra_blkcipher.max_keysize = alg->cra_blkcipher.max_keysize - + CTR_RFC3686_NONCE_SIZE; + inst->alg.cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | + (alg->cra_flags & CRYPTO_ALG_ASYNC); + inst->alg.cra_type = &crypto_ablkcipher_type; + + inst->alg.cra_ablkcipher.ivsize = CTR_RFC3686_IV_SIZE; + inst->alg.cra_ablkcipher.min_keysize = + alg->cra_ablkcipher.min_keysize + CTR_RFC3686_NONCE_SIZE; + inst->alg.cra_ablkcipher.max_keysize = + alg->cra_ablkcipher.max_keysize + CTR_RFC3686_NONCE_SIZE; - inst->alg.cra_blkcipher.geniv = "seqiv"; + inst->alg.cra_ablkcipher.geniv = "seqiv"; + + inst->alg.cra_ablkcipher.setkey = crypto_rfc3686_setkey; + inst->alg.cra_ablkcipher.encrypt = crypto_rfc3686_crypt; + inst->alg.cra_ablkcipher.decrypt = crypto_rfc3686_crypt; inst->alg.cra_ctxsize = sizeof(struct crypto_rfc3686_ctx); inst->alg.cra_init = crypto_rfc3686_init_tfm; inst->alg.cra_exit = crypto_rfc3686_exit_tfm; - inst->alg.cra_blkcipher.setkey = crypto_rfc3686_setkey; - inst->alg.cra_blkcipher.encrypt = crypto_rfc3686_crypt; - inst->alg.cra_blkcipher.decrypt = crypto_rfc3686_crypt; - -out: - crypto_mod_put(alg); return inst; -out_put_alg: - inst = ERR_PTR(err); - goto out; +err_drop_spawn: + crypto_drop_skcipher(spawn); +err_free_inst: + kfree(inst); + return ERR_PTR(err); +} + +static void crypto_rfc3686_free(struct crypto_instance *inst) +{ + struct crypto_skcipher_spawn *spawn = crypto_instance_ctx(inst); + + crypto_drop_skcipher(spawn); + kfree(inst); } static struct crypto_template crypto_rfc3686_tmpl = { .name = "rfc3686", .alloc = crypto_rfc3686_alloc, - .free = crypto_ctr_free, + .free = crypto_rfc3686_free, .module = THIS_MODULE, }; diff --git a/crypto/tcrypt.c b/crypto/tcrypt.c index 7ae2130..87ef7d6 100644 --- a/crypto/tcrypt.c +++ b/crypto/tcrypt.c @@ -1591,6 +1591,10 @@ static int do_test(int m) speed_template_16_24_32); test_acipher_speed("ofb(aes)", DECRYPT, sec, NULL, 0, speed_template_16_24_32); + test_acipher_speed("rfc3686(ctr(aes))", ENCRYPT, sec, NULL, 0, + speed_template_20_28_36); + test_acipher_speed("rfc3686(ctr(aes))", DECRYPT, sec, NULL, 0, + speed_template_20_28_36); break; case 501: diff --git a/crypto/tcrypt.h b/crypto/tcrypt.h index cd20685..ecdeeb1 100644 --- a/crypto/tcrypt.h +++ b/crypto/tcrypt.h @@ -51,6 +51,7 @@ static u8 speed_template_8_16[] = {8, 16, 0}; static u8 speed_template_8_32[] = {8, 32, 0}; static u8 speed_template_16_32[] = {16, 32, 0}; static u8 speed_template_16_24_32[] = {16, 24, 32, 0}; +static u8 speed_template_20_28_36[] = {20, 28, 36, 0}; static u8 speed_template_32_40_48[] = {32, 40, 48, 0}; static u8 speed_template_32_48[] = {32, 48, 0}; static u8 speed_template_32_48_64[] = {32, 48, 64, 0}; 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