crypto: ccm - Use skcipher
This patch converts ccm to use the new skcipher interface as opposed to ablkcipher. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>hifive-unleashed-5.1
Herbert Xu
parent
b2b39c2f97
commit
464b93a3c7
72
crypto/ccm.c
72
crypto/ccm.c
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@ -28,7 +28,7 @@ struct ccm_instance_ctx {
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struct crypto_ccm_ctx {
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struct crypto_cipher *cipher;
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struct crypto_ablkcipher *ctr;
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struct crypto_skcipher *ctr;
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};
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struct crypto_rfc4309_ctx {
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@ -50,7 +50,7 @@ struct crypto_ccm_req_priv_ctx {
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u32 flags;
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struct scatterlist src[3];
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struct scatterlist dst[3];
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struct ablkcipher_request abreq;
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struct skcipher_request skreq;
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};
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static inline struct crypto_ccm_req_priv_ctx *crypto_ccm_reqctx(
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@ -83,15 +83,15 @@ static int crypto_ccm_setkey(struct crypto_aead *aead, const u8 *key,
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unsigned int keylen)
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{
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struct crypto_ccm_ctx *ctx = crypto_aead_ctx(aead);
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struct crypto_ablkcipher *ctr = ctx->ctr;
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struct crypto_skcipher *ctr = ctx->ctr;
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struct crypto_cipher *tfm = ctx->cipher;
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int err = 0;
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crypto_ablkcipher_clear_flags(ctr, CRYPTO_TFM_REQ_MASK);
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crypto_ablkcipher_set_flags(ctr, crypto_aead_get_flags(aead) &
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CRYPTO_TFM_REQ_MASK);
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err = crypto_ablkcipher_setkey(ctr, key, keylen);
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crypto_aead_set_flags(aead, crypto_ablkcipher_get_flags(ctr) &
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crypto_skcipher_clear_flags(ctr, CRYPTO_TFM_REQ_MASK);
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crypto_skcipher_set_flags(ctr, crypto_aead_get_flags(aead) &
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CRYPTO_TFM_REQ_MASK);
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err = crypto_skcipher_setkey(ctr, key, keylen);
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crypto_aead_set_flags(aead, crypto_skcipher_get_flags(ctr) &
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CRYPTO_TFM_RES_MASK);
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if (err)
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goto out;
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@ -347,7 +347,7 @@ static int crypto_ccm_encrypt(struct aead_request *req)
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struct crypto_aead *aead = crypto_aead_reqtfm(req);
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struct crypto_ccm_ctx *ctx = crypto_aead_ctx(aead);
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struct crypto_ccm_req_priv_ctx *pctx = crypto_ccm_reqctx(req);
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struct ablkcipher_request *abreq = &pctx->abreq;
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struct skcipher_request *skreq = &pctx->skreq;
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struct scatterlist *dst;
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unsigned int cryptlen = req->cryptlen;
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u8 *odata = pctx->odata;
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@ -366,11 +366,11 @@ static int crypto_ccm_encrypt(struct aead_request *req)
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if (req->src != req->dst)
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dst = pctx->dst;
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ablkcipher_request_set_tfm(abreq, ctx->ctr);
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ablkcipher_request_set_callback(abreq, pctx->flags,
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crypto_ccm_encrypt_done, req);
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ablkcipher_request_set_crypt(abreq, pctx->src, dst, cryptlen + 16, iv);
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err = crypto_ablkcipher_encrypt(abreq);
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skcipher_request_set_tfm(skreq, ctx->ctr);
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skcipher_request_set_callback(skreq, pctx->flags,
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crypto_ccm_encrypt_done, req);
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skcipher_request_set_crypt(skreq, pctx->src, dst, cryptlen + 16, iv);
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err = crypto_skcipher_encrypt(skreq);
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if (err)
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return err;
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@ -407,7 +407,7 @@ static int crypto_ccm_decrypt(struct aead_request *req)
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struct crypto_aead *aead = crypto_aead_reqtfm(req);
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struct crypto_ccm_ctx *ctx = crypto_aead_ctx(aead);
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struct crypto_ccm_req_priv_ctx *pctx = crypto_ccm_reqctx(req);
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struct ablkcipher_request *abreq = &pctx->abreq;
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struct skcipher_request *skreq = &pctx->skreq;
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struct scatterlist *dst;
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unsigned int authsize = crypto_aead_authsize(aead);
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unsigned int cryptlen = req->cryptlen;
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@ -429,11 +429,11 @@ static int crypto_ccm_decrypt(struct aead_request *req)
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if (req->src != req->dst)
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dst = pctx->dst;
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ablkcipher_request_set_tfm(abreq, ctx->ctr);
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ablkcipher_request_set_callback(abreq, pctx->flags,
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crypto_ccm_decrypt_done, req);
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ablkcipher_request_set_crypt(abreq, pctx->src, dst, cryptlen + 16, iv);
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err = crypto_ablkcipher_decrypt(abreq);
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skcipher_request_set_tfm(skreq, ctx->ctr);
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skcipher_request_set_callback(skreq, pctx->flags,
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crypto_ccm_decrypt_done, req);
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skcipher_request_set_crypt(skreq, pctx->src, dst, cryptlen + 16, iv);
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err = crypto_skcipher_decrypt(skreq);
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if (err)
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return err;
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@ -454,7 +454,7 @@ static int crypto_ccm_init_tfm(struct crypto_aead *tfm)
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struct ccm_instance_ctx *ictx = aead_instance_ctx(inst);
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struct crypto_ccm_ctx *ctx = crypto_aead_ctx(tfm);
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struct crypto_cipher *cipher;
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struct crypto_ablkcipher *ctr;
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struct crypto_skcipher *ctr;
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unsigned long align;
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int err;
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@ -462,7 +462,7 @@ static int crypto_ccm_init_tfm(struct crypto_aead *tfm)
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if (IS_ERR(cipher))
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return PTR_ERR(cipher);
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ctr = crypto_spawn_skcipher(&ictx->ctr);
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ctr = crypto_spawn_skcipher2(&ictx->ctr);
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err = PTR_ERR(ctr);
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if (IS_ERR(ctr))
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goto err_free_cipher;
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@ -475,7 +475,7 @@ static int crypto_ccm_init_tfm(struct crypto_aead *tfm)
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crypto_aead_set_reqsize(
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tfm,
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align + sizeof(struct crypto_ccm_req_priv_ctx) +
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crypto_ablkcipher_reqsize(ctr));
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crypto_skcipher_reqsize(ctr));
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return 0;
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@ -489,7 +489,7 @@ static void crypto_ccm_exit_tfm(struct crypto_aead *tfm)
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struct crypto_ccm_ctx *ctx = crypto_aead_ctx(tfm);
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crypto_free_cipher(ctx->cipher);
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crypto_free_ablkcipher(ctx->ctr);
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crypto_free_skcipher(ctx->ctr);
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}
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static void crypto_ccm_free(struct aead_instance *inst)
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@ -509,7 +509,7 @@ static int crypto_ccm_create_common(struct crypto_template *tmpl,
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{
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struct crypto_attr_type *algt;
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struct aead_instance *inst;
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struct crypto_alg *ctr;
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struct skcipher_alg *ctr;
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struct crypto_alg *cipher;
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struct ccm_instance_ctx *ictx;
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int err;
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@ -544,39 +544,40 @@ static int crypto_ccm_create_common(struct crypto_template *tmpl,
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goto err_free_inst;
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crypto_set_skcipher_spawn(&ictx->ctr, aead_crypto_instance(inst));
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err = crypto_grab_skcipher(&ictx->ctr, ctr_name, 0,
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crypto_requires_sync(algt->type,
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algt->mask));
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err = crypto_grab_skcipher2(&ictx->ctr, ctr_name, 0,
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crypto_requires_sync(algt->type,
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algt->mask));
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if (err)
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goto err_drop_cipher;
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ctr = crypto_skcipher_spawn_alg(&ictx->ctr);
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ctr = crypto_spawn_skcipher_alg(&ictx->ctr);
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/* Not a stream cipher? */
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err = -EINVAL;
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if (ctr->cra_blocksize != 1)
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if (ctr->base.cra_blocksize != 1)
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goto err_drop_ctr;
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/* We want the real thing! */
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if (ctr->cra_ablkcipher.ivsize != 16)
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if (crypto_skcipher_alg_ivsize(ctr) != 16)
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goto err_drop_ctr;
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err = -ENAMETOOLONG;
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if (snprintf(inst->alg.base.cra_driver_name, CRYPTO_MAX_ALG_NAME,
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"ccm_base(%s,%s)", ctr->cra_driver_name,
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"ccm_base(%s,%s)", ctr->base.cra_driver_name,
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cipher->cra_driver_name) >= CRYPTO_MAX_ALG_NAME)
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goto err_drop_ctr;
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memcpy(inst->alg.base.cra_name, full_name, CRYPTO_MAX_ALG_NAME);
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inst->alg.base.cra_flags = ctr->cra_flags & CRYPTO_ALG_ASYNC;
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inst->alg.base.cra_flags = ctr->base.cra_flags & CRYPTO_ALG_ASYNC;
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inst->alg.base.cra_priority = (cipher->cra_priority +
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ctr->cra_priority) / 2;
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ctr->base.cra_priority) / 2;
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inst->alg.base.cra_blocksize = 1;
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inst->alg.base.cra_alignmask = cipher->cra_alignmask |
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ctr->cra_alignmask |
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ctr->base.cra_alignmask |
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(__alignof__(u32) - 1);
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inst->alg.ivsize = 16;
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inst->alg.chunksize = crypto_skcipher_alg_chunksize(ctr);
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inst->alg.maxauthsize = 16;
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inst->alg.base.cra_ctxsize = sizeof(struct crypto_ccm_ctx);
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inst->alg.init = crypto_ccm_init_tfm;
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@ -863,6 +864,7 @@ static int crypto_rfc4309_create(struct crypto_template *tmpl,
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inst->alg.base.cra_alignmask = alg->base.cra_alignmask;
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inst->alg.ivsize = 8;
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inst->alg.chunksize = crypto_aead_alg_chunksize(alg);
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inst->alg.maxauthsize = 16;
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inst->alg.base.cra_ctxsize = sizeof(struct crypto_rfc4309_ctx);
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