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crypto: cryptd - remove ability to instantiate ablkciphers
Remove cryptd_alloc_ablkcipher() and the ability of cryptd to create
algorithms with the deprecated "ablkcipher" type.
This has been unused since commit 0e145b477d ("crypto: ablk_helper -
remove ablk_helper"). Instead, cryptd_alloc_skcipher() is used.
Signed-off-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Eric Biggers
Herbert Xu
parent
8c3fffe399
commit
0a877e354a
249
crypto/cryptd.c
249
crypto/cryptd.c
@ -65,15 +65,6 @@ struct aead_instance_ctx {
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struct cryptd_queue *queue;
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};
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struct cryptd_blkcipher_ctx {
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atomic_t refcnt;
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struct crypto_blkcipher *child;
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};
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struct cryptd_blkcipher_request_ctx {
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crypto_completion_t complete;
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};
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struct cryptd_skcipher_ctx {
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atomic_t refcnt;
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struct crypto_sync_skcipher *child;
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@ -216,129 +207,6 @@ static inline void cryptd_check_internal(struct rtattr **tb, u32 *type,
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*mask |= algt->mask & CRYPTO_ALG_INTERNAL;
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}
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static int cryptd_blkcipher_setkey(struct crypto_ablkcipher *parent,
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const u8 *key, unsigned int keylen)
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{
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struct cryptd_blkcipher_ctx *ctx = crypto_ablkcipher_ctx(parent);
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struct crypto_blkcipher *child = ctx->child;
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int err;
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crypto_blkcipher_clear_flags(child, CRYPTO_TFM_REQ_MASK);
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crypto_blkcipher_set_flags(child, crypto_ablkcipher_get_flags(parent) &
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CRYPTO_TFM_REQ_MASK);
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err = crypto_blkcipher_setkey(child, key, keylen);
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crypto_ablkcipher_set_flags(parent, crypto_blkcipher_get_flags(child) &
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CRYPTO_TFM_RES_MASK);
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return err;
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}
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static void cryptd_blkcipher_crypt(struct ablkcipher_request *req,
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struct crypto_blkcipher *child,
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int err,
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int (*crypt)(struct blkcipher_desc *desc,
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struct scatterlist *dst,
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struct scatterlist *src,
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unsigned int len))
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{
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struct cryptd_blkcipher_request_ctx *rctx;
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struct cryptd_blkcipher_ctx *ctx;
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struct crypto_ablkcipher *tfm;
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struct blkcipher_desc desc;
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int refcnt;
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rctx = ablkcipher_request_ctx(req);
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if (unlikely(err == -EINPROGRESS))
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goto out;
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desc.tfm = child;
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desc.info = req->info;
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desc.flags = CRYPTO_TFM_REQ_MAY_SLEEP;
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err = crypt(&desc, req->dst, req->src, req->nbytes);
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req->base.complete = rctx->complete;
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out:
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tfm = crypto_ablkcipher_reqtfm(req);
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ctx = crypto_ablkcipher_ctx(tfm);
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refcnt = atomic_read(&ctx->refcnt);
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local_bh_disable();
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rctx->complete(&req->base, err);
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local_bh_enable();
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if (err != -EINPROGRESS && refcnt && atomic_dec_and_test(&ctx->refcnt))
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crypto_free_ablkcipher(tfm);
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}
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static void cryptd_blkcipher_encrypt(struct crypto_async_request *req, int err)
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{
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struct cryptd_blkcipher_ctx *ctx = crypto_tfm_ctx(req->tfm);
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struct crypto_blkcipher *child = ctx->child;
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cryptd_blkcipher_crypt(ablkcipher_request_cast(req), child, err,
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crypto_blkcipher_crt(child)->encrypt);
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}
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static void cryptd_blkcipher_decrypt(struct crypto_async_request *req, int err)
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{
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struct cryptd_blkcipher_ctx *ctx = crypto_tfm_ctx(req->tfm);
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struct crypto_blkcipher *child = ctx->child;
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cryptd_blkcipher_crypt(ablkcipher_request_cast(req), child, err,
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crypto_blkcipher_crt(child)->decrypt);
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}
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static int cryptd_blkcipher_enqueue(struct ablkcipher_request *req,
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crypto_completion_t compl)
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{
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struct cryptd_blkcipher_request_ctx *rctx = ablkcipher_request_ctx(req);
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struct crypto_ablkcipher *tfm = crypto_ablkcipher_reqtfm(req);
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struct cryptd_queue *queue;
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queue = cryptd_get_queue(crypto_ablkcipher_tfm(tfm));
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rctx->complete = req->base.complete;
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req->base.complete = compl;
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return cryptd_enqueue_request(queue, &req->base);
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}
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static int cryptd_blkcipher_encrypt_enqueue(struct ablkcipher_request *req)
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{
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return cryptd_blkcipher_enqueue(req, cryptd_blkcipher_encrypt);
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}
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static int cryptd_blkcipher_decrypt_enqueue(struct ablkcipher_request *req)
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{
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return cryptd_blkcipher_enqueue(req, cryptd_blkcipher_decrypt);
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}
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static int cryptd_blkcipher_init_tfm(struct crypto_tfm *tfm)
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{
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struct crypto_instance *inst = crypto_tfm_alg_instance(tfm);
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struct cryptd_instance_ctx *ictx = crypto_instance_ctx(inst);
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struct crypto_spawn *spawn = &ictx->spawn;
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struct cryptd_blkcipher_ctx *ctx = crypto_tfm_ctx(tfm);
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struct crypto_blkcipher *cipher;
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cipher = crypto_spawn_blkcipher(spawn);
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if (IS_ERR(cipher))
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return PTR_ERR(cipher);
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ctx->child = cipher;
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tfm->crt_ablkcipher.reqsize =
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sizeof(struct cryptd_blkcipher_request_ctx);
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return 0;
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}
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static void cryptd_blkcipher_exit_tfm(struct crypto_tfm *tfm)
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{
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struct cryptd_blkcipher_ctx *ctx = crypto_tfm_ctx(tfm);
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crypto_free_blkcipher(ctx->child);
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}
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static int cryptd_init_instance(struct crypto_instance *inst,
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struct crypto_alg *alg)
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{
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@ -382,67 +250,6 @@ out_free_inst:
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goto out;
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}
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static int cryptd_create_blkcipher(struct crypto_template *tmpl,
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struct rtattr **tb,
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struct cryptd_queue *queue)
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{
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struct cryptd_instance_ctx *ctx;
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struct crypto_instance *inst;
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struct crypto_alg *alg;
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u32 type = CRYPTO_ALG_TYPE_BLKCIPHER;
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u32 mask = CRYPTO_ALG_TYPE_MASK;
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int err;
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cryptd_check_internal(tb, &type, &mask);
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alg = crypto_get_attr_alg(tb, type, mask);
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if (IS_ERR(alg))
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return PTR_ERR(alg);
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inst = cryptd_alloc_instance(alg, 0, sizeof(*ctx));
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err = PTR_ERR(inst);
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if (IS_ERR(inst))
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goto out_put_alg;
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ctx = crypto_instance_ctx(inst);
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ctx->queue = queue;
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err = crypto_init_spawn(&ctx->spawn, alg, inst,
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CRYPTO_ALG_TYPE_MASK | CRYPTO_ALG_ASYNC);
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if (err)
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goto out_free_inst;
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type = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC;
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if (alg->cra_flags & CRYPTO_ALG_INTERNAL)
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type |= CRYPTO_ALG_INTERNAL;
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inst->alg.cra_flags = type;
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inst->alg.cra_type = &crypto_ablkcipher_type;
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inst->alg.cra_ablkcipher.ivsize = alg->cra_blkcipher.ivsize;
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inst->alg.cra_ablkcipher.min_keysize = alg->cra_blkcipher.min_keysize;
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inst->alg.cra_ablkcipher.max_keysize = alg->cra_blkcipher.max_keysize;
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inst->alg.cra_ctxsize = sizeof(struct cryptd_blkcipher_ctx);
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inst->alg.cra_init = cryptd_blkcipher_init_tfm;
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inst->alg.cra_exit = cryptd_blkcipher_exit_tfm;
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inst->alg.cra_ablkcipher.setkey = cryptd_blkcipher_setkey;
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inst->alg.cra_ablkcipher.encrypt = cryptd_blkcipher_encrypt_enqueue;
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inst->alg.cra_ablkcipher.decrypt = cryptd_blkcipher_decrypt_enqueue;
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err = crypto_register_instance(tmpl, inst);
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if (err) {
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crypto_drop_spawn(&ctx->spawn);
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out_free_inst:
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kfree(inst);
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}
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out_put_alg:
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crypto_mod_put(alg);
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return err;
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}
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static int cryptd_skcipher_setkey(struct crypto_skcipher *parent,
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const u8 *key, unsigned int keylen)
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{
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@ -1118,10 +925,6 @@ static int cryptd_create(struct crypto_template *tmpl, struct rtattr **tb)
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switch (algt->type & algt->mask & CRYPTO_ALG_TYPE_MASK) {
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case CRYPTO_ALG_TYPE_BLKCIPHER:
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if ((algt->type & CRYPTO_ALG_TYPE_MASK) ==
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CRYPTO_ALG_TYPE_BLKCIPHER)
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return cryptd_create_blkcipher(tmpl, tb, &queue);
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return cryptd_create_skcipher(tmpl, tb, &queue);
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case CRYPTO_ALG_TYPE_DIGEST:
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return cryptd_create_hash(tmpl, tb, &queue);
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@ -1160,58 +963,6 @@ static struct crypto_template cryptd_tmpl = {
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.module = THIS_MODULE,
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};
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struct cryptd_ablkcipher *cryptd_alloc_ablkcipher(const char *alg_name,
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u32 type, u32 mask)
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{
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char cryptd_alg_name[CRYPTO_MAX_ALG_NAME];
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struct cryptd_blkcipher_ctx *ctx;
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struct crypto_tfm *tfm;
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if (snprintf(cryptd_alg_name, CRYPTO_MAX_ALG_NAME,
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"cryptd(%s)", alg_name) >= CRYPTO_MAX_ALG_NAME)
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return ERR_PTR(-EINVAL);
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type = crypto_skcipher_type(type);
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mask &= ~CRYPTO_ALG_TYPE_MASK;
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mask |= CRYPTO_ALG_TYPE_BLKCIPHER_MASK;
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tfm = crypto_alloc_base(cryptd_alg_name, type, mask);
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if (IS_ERR(tfm))
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return ERR_CAST(tfm);
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if (tfm->__crt_alg->cra_module != THIS_MODULE) {
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crypto_free_tfm(tfm);
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return ERR_PTR(-EINVAL);
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}
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ctx = crypto_tfm_ctx(tfm);
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atomic_set(&ctx->refcnt, 1);
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return __cryptd_ablkcipher_cast(__crypto_ablkcipher_cast(tfm));
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}
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EXPORT_SYMBOL_GPL(cryptd_alloc_ablkcipher);
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struct crypto_blkcipher *cryptd_ablkcipher_child(struct cryptd_ablkcipher *tfm)
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{
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struct cryptd_blkcipher_ctx *ctx = crypto_ablkcipher_ctx(&tfm->base);
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return ctx->child;
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}
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EXPORT_SYMBOL_GPL(cryptd_ablkcipher_child);
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bool cryptd_ablkcipher_queued(struct cryptd_ablkcipher *tfm)
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{
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struct cryptd_blkcipher_ctx *ctx = crypto_ablkcipher_ctx(&tfm->base);
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return atomic_read(&ctx->refcnt) - 1;
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}
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EXPORT_SYMBOL_GPL(cryptd_ablkcipher_queued);
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void cryptd_free_ablkcipher(struct cryptd_ablkcipher *tfm)
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{
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struct cryptd_blkcipher_ctx *ctx = crypto_ablkcipher_ctx(&tfm->base);
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if (atomic_dec_and_test(&ctx->refcnt))
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crypto_free_ablkcipher(&tfm->base);
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}
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EXPORT_SYMBOL_GPL(cryptd_free_ablkcipher);
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struct cryptd_skcipher *cryptd_alloc_skcipher(const char *alg_name,
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u32 type, u32 mask)
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{
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@ -18,27 +18,11 @@
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#include <crypto/hash.h>
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#include <crypto/skcipher.h>
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struct cryptd_ablkcipher {
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struct crypto_ablkcipher base;
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};
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static inline struct cryptd_ablkcipher *__cryptd_ablkcipher_cast(
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struct crypto_ablkcipher *tfm)
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{
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return (struct cryptd_ablkcipher *)tfm;
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}
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/* alg_name should be algorithm to be cryptd-ed */
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struct cryptd_ablkcipher *cryptd_alloc_ablkcipher(const char *alg_name,
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u32 type, u32 mask);
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struct crypto_blkcipher *cryptd_ablkcipher_child(struct cryptd_ablkcipher *tfm);
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bool cryptd_ablkcipher_queued(struct cryptd_ablkcipher *tfm);
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void cryptd_free_ablkcipher(struct cryptd_ablkcipher *tfm);
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struct cryptd_skcipher {
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struct crypto_skcipher base;
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};
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/* alg_name should be algorithm to be cryptd-ed */
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struct cryptd_skcipher *cryptd_alloc_skcipher(const char *alg_name,
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u32 type, u32 mask);
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struct crypto_skcipher *cryptd_skcipher_child(struct cryptd_skcipher *tfm);
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