X-Git-Url: http://pilppa.org/gitweb/gitweb.cgi?a=blobdiff_plain;f=crypto%2Fauthenc.c;h=4b226768752abed604033f708d093f0b04aee41b;hb=89027d35aa5b8f45ce0f7fa0911db85b46563da0;hp=a61dea1c2fe680ff6d776f4a08c5bb470986b7ab;hpb=e236d4a89a2ffbc8aa18064161f4f159c4d89b4a;p=linux-2.6-omap-h63xx.git diff --git a/crypto/authenc.c b/crypto/authenc.c index a61dea1c2fe..4b226768752 100644 --- a/crypto/authenc.c +++ b/crypto/authenc.c @@ -10,8 +10,10 @@ * */ -#include +#include +#include #include +#include #include #include #include @@ -20,11 +22,9 @@ #include #include -#include "scatterwalk.h" - struct authenc_instance_ctx { struct crypto_spawn auth; - struct crypto_spawn enc; + struct crypto_skcipher_spawn enc; }; struct crypto_authenc_ctx { @@ -45,7 +45,7 @@ static int crypto_authenc_setkey(struct crypto_aead *authenc, const u8 *key, struct crypto_authenc_key_param *param; int err = -EINVAL; - if (keylen < sizeof(*rta)) + if (!RTA_OK(rta, keylen)) goto badkey; if (rta->rta_type != CRYPTO_AUTHENC_KEYA_PARAM) goto badkey; @@ -88,17 +88,32 @@ badkey: goto out; } -static int crypto_authenc_hash(struct aead_request *req) +static void authenc_chain(struct scatterlist *head, struct scatterlist *sg, + int chain) +{ + if (chain) { + head->length += sg->length; + sg = scatterwalk_sg_next(sg); + } + + if (sg) + scatterwalk_sg_chain(head, 2, sg); + else + sg_mark_end(head); +} + +static u8 *crypto_authenc_hash(struct aead_request *req, unsigned int flags, + struct scatterlist *cipher, + unsigned int cryptlen) { struct crypto_aead *authenc = crypto_aead_reqtfm(req); struct crypto_authenc_ctx *ctx = crypto_aead_ctx(authenc); struct crypto_hash *auth = ctx->auth; struct hash_desc desc = { .tfm = auth, + .flags = aead_request_flags(req) & flags, }; u8 *hash = aead_request_ctx(req); - struct scatterlist *dst = req->dst; - unsigned int cryptlen = req->cryptlen; int err; hash = (u8 *)ALIGN((unsigned long)hash + crypto_hash_alignmask(auth), @@ -113,7 +128,7 @@ static int crypto_authenc_hash(struct aead_request *req) if (err) goto auth_unlock; - err = crypto_hash_update(&desc, dst, cryptlen); + err = crypto_hash_update(&desc, cipher, cryptlen); if (err) goto auth_unlock; @@ -122,9 +137,36 @@ auth_unlock: spin_unlock_bh(&ctx->auth_lock); if (err) - return err; + return ERR_PTR(err); + + return hash; +} - scatterwalk_map_and_copy(hash, dst, cryptlen, +static int crypto_authenc_genicv(struct aead_request *req, u8 *iv, + unsigned int flags) +{ + struct crypto_aead *authenc = crypto_aead_reqtfm(req); + struct scatterlist *dst = req->dst; + struct scatterlist cipher[2]; + struct page *dstp; + unsigned int ivsize = crypto_aead_ivsize(authenc); + unsigned int cryptlen; + u8 *vdst; + u8 *hash; + + dstp = sg_page(dst); + vdst = PageHighMem(dstp) ? NULL : page_address(dstp) + dst->offset; + + sg_init_table(cipher, 2); + sg_set_buf(cipher, iv, ivsize); + authenc_chain(cipher, dst, vdst == iv + ivsize); + + cryptlen = req->cryptlen + ivsize; + hash = crypto_authenc_hash(req, flags, cipher, cryptlen); + if (IS_ERR(hash)) + return PTR_ERR(hash); + + scatterwalk_map_and_copy(hash, cipher, cryptlen, crypto_aead_authsize(authenc), 1); return 0; } @@ -132,8 +174,16 @@ auth_unlock: static void crypto_authenc_encrypt_done(struct crypto_async_request *req, int err) { - if (!err) - err = crypto_authenc_hash(req->data); + if (!err) { + struct aead_request *areq = req->data; + struct crypto_aead *authenc = crypto_aead_reqtfm(areq); + struct crypto_authenc_ctx *ctx = crypto_aead_ctx(authenc); + struct ablkcipher_request *abreq = aead_request_ctx(areq); + u8 *iv = (u8 *)(abreq + 1) + + crypto_ablkcipher_reqsize(ctx->enc); + + err = crypto_authenc_genicv(areq, iv, 0); + } aead_request_complete(req->data, err); } @@ -143,70 +193,100 @@ static int crypto_authenc_encrypt(struct aead_request *req) struct crypto_aead *authenc = crypto_aead_reqtfm(req); struct crypto_authenc_ctx *ctx = crypto_aead_ctx(authenc); struct ablkcipher_request *abreq = aead_request_ctx(req); + struct crypto_ablkcipher *enc = ctx->enc; + struct scatterlist *dst = req->dst; + unsigned int cryptlen = req->cryptlen; + u8 *iv = (u8 *)(abreq + 1) + crypto_ablkcipher_reqsize(enc); int err; - ablkcipher_request_set_tfm(abreq, ctx->enc); + ablkcipher_request_set_tfm(abreq, enc); ablkcipher_request_set_callback(abreq, aead_request_flags(req), crypto_authenc_encrypt_done, req); - ablkcipher_request_set_crypt(abreq, req->src, req->dst, req->cryptlen, - req->iv); + ablkcipher_request_set_crypt(abreq, req->src, dst, cryptlen, req->iv); + + memcpy(iv, req->iv, crypto_aead_ivsize(authenc)); err = crypto_ablkcipher_encrypt(abreq); if (err) return err; - return crypto_authenc_hash(req); + return crypto_authenc_genicv(req, iv, CRYPTO_TFM_REQ_MAY_SLEEP); } -static int crypto_authenc_verify(struct aead_request *req) +static void crypto_authenc_givencrypt_done(struct crypto_async_request *req, + int err) { - struct crypto_aead *authenc = crypto_aead_reqtfm(req); + if (!err) { + struct aead_request *areq = req->data; + struct skcipher_givcrypt_request *greq = aead_request_ctx(areq); + + err = crypto_authenc_genicv(areq, greq->giv, 0); + } + + aead_request_complete(req->data, err); +} + +static int crypto_authenc_givencrypt(struct aead_givcrypt_request *req) +{ + struct crypto_aead *authenc = aead_givcrypt_reqtfm(req); struct crypto_authenc_ctx *ctx = crypto_aead_ctx(authenc); - struct crypto_hash *auth = ctx->auth; - struct hash_desc desc = { - .tfm = auth, - .flags = aead_request_flags(req), - }; - u8 *ohash = aead_request_ctx(req); - u8 *ihash; - struct scatterlist *src = req->src; - unsigned int cryptlen = req->cryptlen; - unsigned int authsize; + struct aead_request *areq = &req->areq; + struct skcipher_givcrypt_request *greq = aead_request_ctx(areq); + u8 *iv = req->giv; int err; - ohash = (u8 *)ALIGN((unsigned long)ohash + crypto_hash_alignmask(auth), - crypto_hash_alignmask(auth) + 1); - ihash = ohash + crypto_hash_digestsize(auth); + skcipher_givcrypt_set_tfm(greq, ctx->enc); + skcipher_givcrypt_set_callback(greq, aead_request_flags(areq), + crypto_authenc_givencrypt_done, areq); + skcipher_givcrypt_set_crypt(greq, areq->src, areq->dst, areq->cryptlen, + areq->iv); + skcipher_givcrypt_set_giv(greq, iv, req->seq); - spin_lock_bh(&ctx->auth_lock); - err = crypto_hash_init(&desc); - if (err) - goto auth_unlock; - - err = crypto_hash_update(&desc, req->assoc, req->assoclen); + err = crypto_skcipher_givencrypt(greq); if (err) - goto auth_unlock; + return err; - err = crypto_hash_update(&desc, src, cryptlen); - if (err) - goto auth_unlock; + return crypto_authenc_genicv(areq, iv, CRYPTO_TFM_REQ_MAY_SLEEP); +} - err = crypto_hash_final(&desc, ohash); -auth_unlock: - spin_unlock_bh(&ctx->auth_lock); +static int crypto_authenc_verify(struct aead_request *req, + struct scatterlist *cipher, + unsigned int cryptlen) +{ + struct crypto_aead *authenc = crypto_aead_reqtfm(req); + u8 *ohash; + u8 *ihash; + unsigned int authsize; - if (err) - return err; + ohash = crypto_authenc_hash(req, CRYPTO_TFM_REQ_MAY_SLEEP, cipher, + cryptlen); + if (IS_ERR(ohash)) + return PTR_ERR(ohash); authsize = crypto_aead_authsize(authenc); - scatterwalk_map_and_copy(ihash, src, cryptlen, authsize, 0); - return memcmp(ihash, ohash, authsize) ? -EINVAL : 0; + ihash = ohash + authsize; + scatterwalk_map_and_copy(ihash, cipher, cryptlen, authsize, 0); + return memcmp(ihash, ohash, authsize) ? -EBADMSG: 0; } -static void crypto_authenc_decrypt_done(struct crypto_async_request *req, - int err) +static int crypto_authenc_iverify(struct aead_request *req, u8 *iv, + unsigned int cryptlen) { - aead_request_complete(req->data, err); + struct crypto_aead *authenc = crypto_aead_reqtfm(req); + struct scatterlist *src = req->src; + struct scatterlist cipher[2]; + struct page *srcp; + unsigned int ivsize = crypto_aead_ivsize(authenc); + u8 *vsrc; + + srcp = sg_page(src); + vsrc = PageHighMem(srcp) ? NULL : page_address(srcp) + src->offset; + + sg_init_table(cipher, 2); + sg_set_buf(cipher, iv, ivsize); + authenc_chain(cipher, src, vsrc == iv + ivsize); + + return crypto_authenc_verify(req, cipher, cryptlen + ivsize); } static int crypto_authenc_decrypt(struct aead_request *req) @@ -214,17 +294,23 @@ static int crypto_authenc_decrypt(struct aead_request *req) struct crypto_aead *authenc = crypto_aead_reqtfm(req); struct crypto_authenc_ctx *ctx = crypto_aead_ctx(authenc); struct ablkcipher_request *abreq = aead_request_ctx(req); + unsigned int cryptlen = req->cryptlen; + unsigned int authsize = crypto_aead_authsize(authenc); + u8 *iv = req->iv; int err; - err = crypto_authenc_verify(req); + if (cryptlen < authsize) + return -EINVAL; + cryptlen -= authsize; + + err = crypto_authenc_iverify(req, iv, cryptlen); if (err) return err; ablkcipher_request_set_tfm(abreq, ctx->enc); ablkcipher_request_set_callback(abreq, aead_request_flags(req), - crypto_authenc_decrypt_done, req); - ablkcipher_request_set_crypt(abreq, req->src, req->dst, req->cryptlen, - req->iv); + req->base.complete, req->base.data); + ablkcipher_request_set_crypt(abreq, req->src, req->dst, cryptlen, iv); return crypto_ablkcipher_decrypt(abreq); } @@ -242,7 +328,7 @@ static int crypto_authenc_init_tfm(struct crypto_tfm *tfm) if (IS_ERR(auth)) return PTR_ERR(auth); - enc = crypto_spawn_ablkcipher(&ictx->enc); + enc = crypto_spawn_skcipher(&ictx->enc); err = PTR_ERR(enc); if (IS_ERR(enc)) goto err_free_hash; @@ -253,8 +339,9 @@ static int crypto_authenc_init_tfm(struct crypto_tfm *tfm) (crypto_hash_alignmask(auth) & ~(crypto_tfm_ctx_alignment() - 1)) + crypto_hash_digestsize(auth) * 2, - sizeof(struct ablkcipher_request) + - crypto_ablkcipher_reqsize(enc)); + sizeof(struct skcipher_givcrypt_request) + + crypto_ablkcipher_reqsize(enc) + + crypto_ablkcipher_ivsize(enc)); spin_lock_init(&ctx->auth_lock); @@ -275,42 +362,36 @@ static void crypto_authenc_exit_tfm(struct crypto_tfm *tfm) static struct crypto_instance *crypto_authenc_alloc(struct rtattr **tb) { + struct crypto_attr_type *algt; struct crypto_instance *inst; struct crypto_alg *auth; struct crypto_alg *enc; struct authenc_instance_ctx *ctx; + const char *enc_name; int err; - err = crypto_check_attr_type(tb, CRYPTO_ALG_TYPE_AEAD); - if (err) + algt = crypto_get_attr_type(tb); + err = PTR_ERR(algt); + if (IS_ERR(algt)) return ERR_PTR(err); + if ((algt->type ^ CRYPTO_ALG_TYPE_AEAD) & algt->mask) + return ERR_PTR(-EINVAL); + auth = crypto_attr_alg(tb[1], CRYPTO_ALG_TYPE_HASH, CRYPTO_ALG_TYPE_HASH_MASK); if (IS_ERR(auth)) return ERR_PTR(PTR_ERR(auth)); - enc = crypto_attr_alg(tb[2], CRYPTO_ALG_TYPE_BLKCIPHER, - CRYPTO_ALG_TYPE_BLKCIPHER_MASK); - inst = ERR_PTR(PTR_ERR(enc)); - if (IS_ERR(enc)) + enc_name = crypto_attr_alg_name(tb[2]); + err = PTR_ERR(enc_name); + if (IS_ERR(enc_name)) goto out_put_auth; inst = kzalloc(sizeof(*inst) + sizeof(*ctx), GFP_KERNEL); err = -ENOMEM; if (!inst) - goto out_put_enc; - - err = -ENAMETOOLONG; - if (snprintf(inst->alg.cra_name, CRYPTO_MAX_ALG_NAME, - "authenc(%s,%s)", auth->cra_name, enc->cra_name) >= - CRYPTO_MAX_ALG_NAME) - goto err_free_inst; - - if (snprintf(inst->alg.cra_driver_name, CRYPTO_MAX_ALG_NAME, - "authenc(%s,%s)", auth->cra_driver_name, - enc->cra_driver_name) >= CRYPTO_MAX_ALG_NAME) - goto err_free_inst; + goto out_put_auth; ctx = crypto_instance_ctx(inst); @@ -318,17 +399,34 @@ static struct crypto_instance *crypto_authenc_alloc(struct rtattr **tb) if (err) goto err_free_inst; - err = crypto_init_spawn(&ctx->enc, enc, inst, CRYPTO_ALG_TYPE_MASK); + crypto_set_skcipher_spawn(&ctx->enc, inst); + err = crypto_grab_skcipher(&ctx->enc, enc_name, 0, + crypto_requires_sync(algt->type, + algt->mask)); if (err) goto err_drop_auth; - inst->alg.cra_flags = CRYPTO_ALG_TYPE_AEAD | CRYPTO_ALG_ASYNC; + enc = crypto_skcipher_spawn_alg(&ctx->enc); + + err = -ENAMETOOLONG; + if (snprintf(inst->alg.cra_name, CRYPTO_MAX_ALG_NAME, + "authenc(%s,%s)", auth->cra_name, enc->cra_name) >= + CRYPTO_MAX_ALG_NAME) + goto err_drop_enc; + + if (snprintf(inst->alg.cra_driver_name, CRYPTO_MAX_ALG_NAME, + "authenc(%s,%s)", auth->cra_driver_name, + enc->cra_driver_name) >= CRYPTO_MAX_ALG_NAME) + goto err_drop_enc; + + inst->alg.cra_flags = CRYPTO_ALG_TYPE_AEAD; + inst->alg.cra_flags |= enc->cra_flags & CRYPTO_ALG_ASYNC; inst->alg.cra_priority = enc->cra_priority * 10 + auth->cra_priority; inst->alg.cra_blocksize = enc->cra_blocksize; inst->alg.cra_alignmask = auth->cra_alignmask | enc->cra_alignmask; inst->alg.cra_type = &crypto_aead_type; - inst->alg.cra_aead.ivsize = enc->cra_blkcipher.ivsize; + inst->alg.cra_aead.ivsize = enc->cra_ablkcipher.ivsize; inst->alg.cra_aead.maxauthsize = auth->cra_type == &crypto_hash_type ? auth->cra_hash.digestsize : auth->cra_digest.dia_digestsize; @@ -341,18 +439,19 @@ static struct crypto_instance *crypto_authenc_alloc(struct rtattr **tb) inst->alg.cra_aead.setkey = crypto_authenc_setkey; inst->alg.cra_aead.encrypt = crypto_authenc_encrypt; inst->alg.cra_aead.decrypt = crypto_authenc_decrypt; + inst->alg.cra_aead.givencrypt = crypto_authenc_givencrypt; out: - crypto_mod_put(enc); -out_put_auth: crypto_mod_put(auth); return inst; +err_drop_enc: + crypto_drop_skcipher(&ctx->enc); err_drop_auth: crypto_drop_spawn(&ctx->auth); err_free_inst: kfree(inst); -out_put_enc: +out_put_auth: inst = ERR_PTR(err); goto out; } @@ -361,7 +460,7 @@ static void crypto_authenc_free(struct crypto_instance *inst) { struct authenc_instance_ctx *ctx = crypto_instance_ctx(inst); - crypto_drop_spawn(&ctx->enc); + crypto_drop_skcipher(&ctx->enc); crypto_drop_spawn(&ctx->auth); kfree(inst); }