diff options
| -rw-r--r-- | crypto/gcm.c | 905 |
1 files changed, 373 insertions, 532 deletions
diff --git a/crypto/gcm.c b/crypto/gcm.c index fc2b55e..7d32d47 100644 --- a/crypto/gcm.c +++ b/crypto/gcm.c @@ -49,25 +49,22 @@ struct crypto_rfc4543_ctx { }; struct crypto_rfc4543_req_ctx { - u8 auth_tag[16]; - u8 assocbuf[32]; - struct scatterlist cipher[1]; - struct scatterlist payload[2]; - struct scatterlist assoc[2]; struct aead_request subreq; }; struct crypto_gcm_ghash_ctx { unsigned int cryptlen; struct scatterlist *src; - void (*complete)(struct aead_request *req, int err); + int (*complete)(struct aead_request *req, u32 flags); }; struct crypto_gcm_req_priv_ctx { + u8 iv[16]; u8 auth_tag[16]; u8 iauth_tag[16]; - struct scatterlist src[2]; - struct scatterlist dst[2]; + struct scatterlist src[3]; + struct scatterlist dst[3]; + struct scatterlist sg; struct crypto_gcm_ghash_ctx ghash_ctx; union { struct ahash_request ahreq; @@ -80,7 +77,12 @@ struct crypto_gcm_setkey_result { struct completion completion; }; -static void *gcm_zeroes; +static struct { + u8 buf[16]; + struct scatterlist sg; +} *gcm_zeroes; + +static int crypto_rfc4543_copy_src_to_dst(struct aead_request *req, bool enc); static inline struct crypto_gcm_req_priv_ctx *crypto_gcm_reqctx( struct aead_request *req) @@ -120,15 +122,13 @@ static int crypto_gcm_setkey(struct crypto_aead *aead, const u8 *key, crypto_ablkcipher_clear_flags(ctr, CRYPTO_TFM_REQ_MASK); crypto_ablkcipher_set_flags(ctr, crypto_aead_get_flags(aead) & - CRYPTO_TFM_REQ_MASK); - + CRYPTO_TFM_REQ_MASK); err = crypto_ablkcipher_setkey(ctr, key, keylen); + crypto_aead_set_flags(aead, crypto_ablkcipher_get_flags(ctr) & + CRYPTO_TFM_RES_MASK); if (err) return err; - crypto_aead_set_flags(aead, crypto_ablkcipher_get_flags(ctr) & - CRYPTO_TFM_RES_MASK); - data = kzalloc(sizeof(*data) + crypto_ablkcipher_reqsize(ctr), GFP_KERNEL); if (!data) @@ -163,7 +163,7 @@ static int crypto_gcm_setkey(struct crypto_aead *aead, const u8 *key, CRYPTO_TFM_RES_MASK); out: - kfree(data); + kzfree(data); return err; } @@ -186,35 +186,46 @@ static int crypto_gcm_setauthsize(struct crypto_aead *tfm, return 0; } -static void crypto_gcm_init_crypt(struct ablkcipher_request *ablk_req, - struct aead_request *req, - unsigned int cryptlen) +static void crypto_gcm_init_common(struct aead_request *req) { - struct crypto_aead *aead = crypto_aead_reqtfm(req); - struct crypto_gcm_ctx *ctx = crypto_aead_ctx(aead); struct crypto_gcm_req_priv_ctx *pctx = crypto_gcm_reqctx(req); - struct scatterlist *dst; __be32 counter = cpu_to_be32(1); + struct scatterlist *sg; memset(pctx->auth_tag, 0, sizeof(pctx->auth_tag)); - memcpy(req->iv + 12, &counter, 4); + memcpy(pctx->iv, req->iv, 12); + memcpy(pctx->iv + 12, &counter, 4); - sg_init_table(pctx->src, 2); + sg_init_table(pctx->src, 3); sg_set_buf(pctx->src, pctx->auth_tag, sizeof(pctx->auth_tag)); - scatterwalk_sg_chain(pctx->src, 2, req->src); + sg = scatterwalk_ffwd(pctx->src + 1, req->src, req->assoclen); + if (sg != pctx->src + 1) + scatterwalk_sg_chain(pctx->src, 2, sg); - dst = pctx->src; if (req->src != req->dst) { - sg_init_table(pctx->dst, 2); + sg_init_table(pctx->dst, 3); sg_set_buf(pctx->dst, pctx->auth_tag, sizeof(pctx->auth_tag)); - scatterwalk_sg_chain(pctx->dst, 2, req->dst); - dst = pctx->dst; + sg = scatterwalk_ffwd(pctx->dst + 1, req->dst, req->assoclen); + if (sg != pctx->dst + 1) + scatterwalk_sg_chain(pctx->dst, 2, sg); } +} + +static void crypto_gcm_init_crypt(struct aead_request *req, + unsigned int cryptlen) +{ + struct crypto_aead *aead = crypto_aead_reqtfm(req); + struct crypto_gcm_ctx *ctx = crypto_aead_ctx(aead); + struct crypto_gcm_req_priv_ctx *pctx = crypto_gcm_reqctx(req); + struct ablkcipher_request *ablk_req = &pctx->u.abreq; + struct scatterlist *dst; + + dst = req->src == req->dst ? pctx->src : pctx->dst; ablkcipher_request_set_tfm(ablk_req, ctx->ctr); ablkcipher_request_set_crypt(ablk_req, pctx->src, dst, cryptlen + sizeof(pctx->auth_tag), - req->iv); + pctx->iv); } static inline unsigned int gcm_remain(unsigned int len) @@ -224,41 +235,31 @@ static inline unsigned int gcm_remain(unsigned int len) } static void gcm_hash_len_done(struct crypto_async_request *areq, int err); -static void gcm_hash_final_done(struct crypto_async_request *areq, int err); static int gcm_hash_update(struct aead_request *req, - struct crypto_gcm_req_priv_ctx *pctx, crypto_completion_t compl, struct scatterlist *src, - unsigned int len) + unsigned int len, u32 flags) { + struct crypto_gcm_req_priv_ctx *pctx = crypto_gcm_reqctx(req); struct ahash_request *ahreq = &pctx->u.ahreq; - ahash_request_set_callback(ahreq, aead_request_flags(req), - compl, req); + ahash_request_set_callback(ahreq, flags, compl, req); ahash_request_set_crypt(ahreq, src, NULL, len); return crypto_ahash_update(ahreq); } static int gcm_hash_remain(struct aead_request *req, - struct crypto_gcm_req_priv_ctx *pctx, unsigned int remain, - crypto_completion_t compl) + crypto_completion_t compl, u32 flags) { - struct ahash_request *ahreq = &pctx->u.ahreq; - - ahash_request_set_callback(ahreq, aead_request_flags(req), - compl, req); - sg_init_one(pctx->src, gcm_zeroes, remain); - ahash_request_set_crypt(ahreq, pctx->src, NULL, remain); - - return crypto_ahash_update(ahreq); + return gcm_hash_update(req, compl, &gcm_zeroes->sg, remain, flags); } -static int gcm_hash_len(struct aead_request *req, - struct crypto_gcm_req_priv_ctx *pctx) +static int gcm_hash_len(struct aead_request *req, u32 flags) { + struct crypto_gcm_req_priv_ctx *pctx = crypto_gcm_reqctx(req); struct ahash_request *ahreq = &pctx->u.ahreq; struct crypto_gcm_ghash_ctx *gctx = &pctx->ghash_ctx; u128 lengths; @@ -266,76 +267,41 @@ static int gcm_hash_len(struct aead_request *req, lengths.a = cpu_to_be64(req->assoclen * 8); lengths.b = cpu_to_be64(gctx->cryptlen * 8); memcpy(pctx->iauth_tag, &lengths, 16); - sg_init_one(pctx->src, pctx->iauth_tag, 16); - ahash_request_set_callback(ahreq, aead_request_flags(req), - gcm_hash_len_done, req); - ahash_request_set_crypt(ahreq, pctx->src, - NULL, sizeof(lengths)); - - return crypto_ahash_update(ahreq); -} - -static int gcm_hash_final(struct aead_request *req, - struct crypto_gcm_req_priv_ctx *pctx) -{ - struct ahash_request *ahreq = &pctx->u.ahreq; - - ahash_request_set_callback(ahreq, aead_request_flags(req), - gcm_hash_final_done, req); - ahash_request_set_crypt(ahreq, NULL, pctx->iauth_tag, 0); + sg_init_one(&pctx->sg, pctx->iauth_tag, 16); + ahash_request_set_callback(ahreq, flags, gcm_hash_len_done, req); + ahash_request_set_crypt(ahreq, &pctx->sg, + pctx->iauth_tag, sizeof(lengths)); - return crypto_ahash_final(ahreq); + return crypto_ahash_finup(ahreq); } -static void __gcm_hash_final_done(struct aead_request *req, int err) +static int gcm_hash_len_continue(struct aead_request *req, u32 flags) { struct crypto_gcm_req_priv_ctx *pctx = crypto_gcm_reqctx(req); struct crypto_gcm_ghash_ctx *gctx = &pctx->ghash_ctx; - if (!err) - crypto_xor(pctx->auth_tag, pctx->iauth_tag, 16); - - gctx->complete(req, err); + return gctx->complete(req, flags); } -static void gcm_hash_final_done(struct crypto_async_request *areq, int err) +static void gcm_hash_len_done(struct crypto_async_request *areq, int err) { struct aead_request *req = areq->data; - __gcm_hash_final_done(req, err); -} - -static void __gcm_hash_len_done(struct aead_request *req, int err) -{ - struct crypto_gcm_req_priv_ctx *pctx = crypto_gcm_reqctx(req); - - if (!err) { - err = gcm_hash_final(req, pctx); - if (err == -EINPROGRESS || err == -EBUSY) - return; - } - - __gcm_hash_final_done(req, err); -} + if (err) + goto out; -static void gcm_hash_len_done(struct crypto_async_request *areq, int err) -{ - struct aead_request *req = areq->data; + err = gcm_hash_len_continue(req, 0); + if (err == -EINPROGRESS) + return; - __gcm_hash_len_done(req, err); +out: + aead_request_complete(req, err); } -static void __gcm_hash_crypt_remain_done(struct aead_request *req, int err) +static int gcm_hash_crypt_remain_continue(struct aead_request *req, u32 flags) { - struct crypto_gcm_req_priv_ctx *pctx = crypto_gcm_reqctx(req); - - if (!err) { - err = gcm_hash_len(req, pctx); - if (err == -EINPROGRESS || err == -EBUSY) - return; - } - - __gcm_hash_len_done(req, err); + return gcm_hash_len(req, flags) ?: + gcm_hash_len_continue(req, flags); } static void gcm_hash_crypt_remain_done(struct crypto_async_request *areq, @@ -343,55 +309,58 @@ static void gcm_hash_crypt_remain_done(struct crypto_async_request *areq, { struct aead_request *req = areq->data; - __gcm_hash_crypt_remain_done(req, err); + if (err) + goto out; + + err = gcm_hash_crypt_remain_continue(req, 0); + if (err == -EINPROGRESS) + return; + +out: + aead_request_complete(req, err); } -static void __gcm_hash_crypt_done(struct aead_request *req, int err) +static int gcm_hash_crypt_continue(struct aead_request *req, u32 flags) { struct crypto_gcm_req_priv_ctx *pctx = crypto_gcm_reqctx(req); struct crypto_gcm_ghash_ctx *gctx = &pctx->ghash_ctx; unsigned int remain; - if (!err) { - remain = gcm_remain(gctx->cryptlen); - BUG_ON(!remain); - err = gcm_hash_remain(req, pctx, remain, - gcm_hash_crypt_remain_done); - if (err == -EINPROGRESS || err == -EBUSY) - return; - } + remain = gcm_remain(gctx->cryptlen); + if (remain) + return gcm_hash_remain(req, remain, + gcm_hash_crypt_remain_done, flags) ?: + gcm_hash_crypt_remain_continue(req, flags); - __gcm_hash_crypt_remain_done(req, err); + return gcm_hash_crypt_remain_continue(req, flags); } static void gcm_hash_crypt_done(struct crypto_async_request *areq, int err) { struct aead_request *req = areq->data; - __gcm_hash_crypt_done(req, err); + if (err) + goto out; + + err = gcm_hash_crypt_continue(req, 0); + if (err == -EINPROGRESS) + return; + +out: + aead_request_complete(req, err); } -static void __gcm_hash_assoc_remain_done(struct aead_request *req, int err) +static int gcm_hash_assoc_remain_continue(struct aead_request *req, u32 flags) { struct crypto_gcm_req_priv_ctx *pctx = crypto_gcm_reqctx(req); struct crypto_gcm_ghash_ctx *gctx = &pctx->ghash_ctx; - crypto_completion_t compl; - unsigned int remain = 0; - - if (!err && gctx->cryptlen) { - remain = gcm_remain(gctx->cryptlen); - compl = remain ? gcm_hash_crypt_done : - gcm_hash_crypt_remain_done; - err = gcm_hash_update(req, pctx, compl, - gctx->src, gctx->cryptlen); - if (err == -EINPROGRESS || err == -EBUSY) - return; - } - if (remain) - __gcm_hash_crypt_done(req, err); - else - __gcm_hash_crypt_remain_done(req, err); + if (gctx->cryptlen) + return gcm_hash_update(req, gcm_hash_crypt_done, + gctx->src, gctx->cryptlen, flags) ?: + gcm_hash_crypt_continue(req, flags); + + return gcm_hash_crypt_remain_continue(req, flags); } static void gcm_hash_assoc_remain_done(struct crypto_async_request *areq, @@ -399,146 +368,120 @@ static void gcm_hash_assoc_remain_done(struct crypto_async_request *areq, { struct aead_request *req = areq->data; - __gcm_hash_assoc_remain_done(req, err); + if (err) + goto out; + + err = gcm_hash_assoc_remain_continue(req, 0); + if (err == -EINPROGRESS) + return; + +out: + aead_request_complete(req, err); } -static void __gcm_hash_assoc_done(struct aead_request *req, int err) +static int gcm_hash_assoc_continue(struct aead_request *req, u32 flags) { - struct crypto_gcm_req_priv_ctx *pctx = crypto_gcm_reqctx(req); unsigned int remain; - if (!err) { - remain = gcm_remain(req->assoclen); - BUG_ON(!remain); - err = gcm_hash_remain(req, pctx, remain, - gcm_hash_assoc_remain_done); - if (err == -EINPROGRESS || err == -EBUSY) - return; - } + remain = gcm_remain(req->assoclen); + if (remain) + return gcm_hash_remain(req, remain, + gcm_hash_assoc_remain_done, flags) ?: + gcm_hash_assoc_remain_continue(req, flags); - __gcm_hash_assoc_remain_done(req, err); + return gcm_hash_assoc_remain_continue(req, flags); } static void gcm_hash_assoc_done(struct crypto_async_request *areq, int err) { struct aead_request *req = areq->data; - __gcm_hash_assoc_done(req, err); + if (err) + goto out; + + err = gcm_hash_assoc_continue(req, 0); + if (err == -EINPROGRESS) + return; + +out: + aead_request_complete(req, err); } -static void __gcm_hash_init_done(struct aead_request *req, int err) +static int gcm_hash_init_continue(struct aead_request *req, u32 flags) { - struct crypto_gcm_req_priv_ctx *pctx = crypto_gcm_reqctx(req); - crypto_completion_t compl; - unsigned int remain = 0; - - if (!err && req->assoclen) { - remain = gcm_remain(req->assoclen); - compl = remain ? gcm_hash_assoc_done : - gcm_hash_assoc_remain_done; - err = gcm_hash_update(req, pctx, compl, - req->assoc, req->assoclen); - if (err == -EINPROGRESS || err == -EBUSY) - return; - } + if (req->assoclen) + return gcm_hash_update(req, gcm_hash_assoc_done, + req->src, req->assoclen, flags) ?: + gcm_hash_assoc_continue(req, flags); - if (remain) - __gcm_hash_assoc_done(req, err); - else - __gcm_hash_assoc_remain_done(req, err); + return gcm_hash_assoc_remain_continue(req, flags); } static void gcm_hash_init_done(struct crypto_async_request *areq, int err) { struct aead_request *req = areq->data; - __gcm_hash_init_done(req, err); + if (err) + goto out; + + err = gcm_hash_init_continue(req, 0); + if (err == -EINPROGRESS) + return; + +out: + aead_request_complete(req, err); } -static int gcm_hash(struct aead_request *req, - struct crypto_gcm_req_priv_ctx *pctx) +static int gcm_hash(struct aead_request *req, u32 flags) { + struct crypto_gcm_req_priv_ctx *pctx = crypto_gcm_reqctx(req); struct ahash_request *ahreq = &pctx->u.ahreq; - struct crypto_gcm_ghash_ctx *gctx = &pctx->ghash_ctx; - struct crypto_gcm_ctx *ctx = crypto_tfm_ctx(req->base.tfm); - unsigned int remain; - crypto_completion_t compl; - int err; + struct crypto_gcm_ctx *ctx = crypto_aead_ctx(crypto_aead_reqtfm(req)); ahash_request_set_tfm(ahreq, ctx->ghash); - ahash_request_set_callback(ahreq, aead_request_flags(req), - gcm_hash_init_done, req); - err = crypto_ahash_init(ahreq); - if (err) - return err; - remain = gcm_remain(req->assoclen); - compl = remain ? gcm_hash_assoc_done : gcm_hash_assoc_remain_done; - err = gcm_hash_update(req, pctx, compl, req->assoc, req->assoclen); - if (err) - return err; - if (remain) { - err = gcm_hash_remain(req, pctx, remain, - gcm_hash_assoc_remain_done); - if (err) - return err; - } - remain = gcm_remain(gctx->cryptlen); - compl = remain ? gcm_hash_crypt_done : gcm_hash_crypt_remain_done; - err = gcm_hash_update(req, pctx, compl, gctx->src, gctx->cryptlen); - if (err) - return err; - if (remain) { - err = gcm_hash_remain(req, pctx, remain, - gcm_hash_crypt_remain_done); - if (err) - return err; - } - err = gcm_hash_len(req, pctx); - if (err) - return err; - err = gcm_hash_final(req, pctx); - if (err) - return err; - - return 0; + ahash_request_set_callback(ahreq, flags, gcm_hash_init_done, req); + return crypto_ahash_init(ahreq) ?: + gcm_hash_init_continue(req, flags); } -static void gcm_enc_copy_hash(struct aead_request *req, - struct crypto_gcm_req_priv_ctx *pctx) +static int gcm_enc_copy_hash(struct aead_request *req, u32 flags) { + struct crypto_gcm_req_priv_ctx *pctx = crypto_gcm_reqctx(req); struct crypto_aead *aead = crypto_aead_reqtfm(req); u8 *auth_tag = pctx->auth_tag; - scatterwalk_map_and_copy(auth_tag, req->dst, req->cryptlen, + crypto_xor(auth_tag, pctx->iauth_tag, 16); + scatterwalk_map_and_copy(auth_tag, req->dst, + req->assoclen + req->cryptlen, crypto_aead_authsize(aead), 1); + return 0; } -static void gcm_enc_hash_done(struct aead_request *req, int err) +static int gcm_encrypt_continue(struct aead_request *req, u32 flags) { struct crypto_gcm_req_priv_ctx *pctx = crypto_gcm_reqctx(req); + struct crypto_gcm_ghash_ctx *gctx = &pctx->ghash_ctx; - if (!err) - gcm_enc_copy_hash(req, pctx); + gctx->src = sg_next(req->src == req->dst ? pctx->src : pctx->dst); + gctx->cryptlen = req->cryptlen; + gctx->complete = gcm_enc_copy_hash; - aead_request_complete(req, err); + return gcm_hash(req, flags); } static void gcm_encrypt_done(struct crypto_async_request *areq, int err) { struct aead_request *req = areq->data; - struct crypto_gcm_req_priv_ctx *pctx = crypto_gcm_reqctx(req); - if (!err) { - err = gcm_hash(req, pctx); - if (err == -EINPROGRESS || err == -EBUSY) - return; - else if (!err) { - crypto_xor(pctx->auth_tag, pctx->iauth_tag, 16); - gcm_enc_copy_hash(req, pctx); - } - } + if (err) + goto out; + + err = gcm_encrypt_continue(req, 0); + if (err == -EINPROGRESS) + return; +out: aead_request_complete(req, err); } @@ -546,34 +489,19 @@ static int crypto_gcm_encrypt(struct aead_request *req) { struct crypto_gcm_req_priv_ctx *pctx = crypto_gcm_reqctx(req); struct ablkcipher_request *abreq = &pctx->u.abreq; - struct crypto_gcm_ghash_ctx *gctx = &pctx->ghash_ctx; - int err; - - crypto_gcm_init_crypt(abreq, req, req->cryptlen); - ablkcipher_request_set_callback(abreq, aead_request_flags(req), - gcm_encrypt_done, req); - - gctx->src = req->dst; - gctx->cryptlen = req->cryptlen; - gctx->complete = gcm_enc_hash_done; - - err = crypto_ablkcipher_encrypt(abreq); - if (err) - return err; - - err = gcm_hash(req, pctx); - if (err) - return err; + u32 flags = aead_request_flags(req); - crypto_xor(pctx->auth_tag, pctx->iauth_tag, 16); - gcm_enc_copy_hash(req, pctx); + crypto_gcm_init_common(req); + crypto_gcm_init_crypt(req, req->cryptlen); + ablkcipher_request_set_callback(abreq, flags, gcm_encrypt_done, req); - return 0; + return crypto_ablkcipher_encrypt(abreq) ?: + gcm_encrypt_continue(req, flags); } -static int crypto_gcm_verify(struct aead_request *req, - struct crypto_gcm_req_priv_ctx *pctx) +static int crypto_gcm_verify(struct aead_request *req) { + struct crypto_gcm_req_priv_ctx *pctx = crypto_gcm_reqctx(req); struct crypto_aead *aead = crypto_aead_reqtfm(req); u8 *auth_tag = pctx->auth_tag; u8 *iauth_tag = pctx->iauth_tag; @@ -581,78 +509,57 @@ static int crypto_gcm_verify(struct aead_request *req, unsigned int cryptlen = req->cryptlen - authsize; crypto_xor(auth_tag, iauth_tag, 16); - scatterwalk_map_and_copy(iauth_tag, req->src, cryptlen, authsize, 0); + scatterwalk_map_and_copy(iauth_tag, req->src, + req->assoclen + cryptlen, authsize, 0); return crypto_memneq(iauth_tag, auth_tag, authsize) ? -EBADMSG : 0; } static void gcm_decrypt_done(struct crypto_async_request *areq, int err) { struct aead_request *req = areq->data; - struct crypto_gcm_req_priv_ctx *pctx = crypto_gcm_reqctx(req); if (!err) - err = crypto_gcm_verify(req, pctx); + err = crypto_gcm_verify(req); aead_request_complete(req, err); } -static void gcm_dec_hash_done(struct aead_request *req, int err) +static int gcm_dec_hash_continue(struct aead_request *req, u32 flags) { struct crypto_gcm_req_priv_ctx *pctx = crypto_gcm_reqctx(req); struct ablkcipher_request *abreq = &pctx->u.abreq; struct crypto_gcm_ghash_ctx *gctx = &pctx->ghash_ctx; - if (!err) { - ablkcipher_request_set_callback(abreq, aead_request_flags(req), - gcm_decrypt_done, req); - crypto_gcm_init_crypt(abreq, req, gctx->cryptlen); - err = crypto_ablkcipher_decrypt(abreq); - if (err == -EINPROGRESS || err == -EBUSY) - return; - else if (!err) - err = crypto_gcm_verify(req, pctx); - } - - aead_request_complete(req, err); + crypto_gcm_init_crypt(req, gctx->cryptlen); + ablkcipher_request_set_callback(abreq, flags, gcm_decrypt_done, req); + return crypto_ablkcipher_decrypt(abreq) ?: crypto_gcm_verify(req); } static int crypto_gcm_decrypt(struct aead_request *req) { struct crypto_aead *aead = crypto_aead_reqtfm(req); struct crypto_gcm_req_priv_ctx *pctx = crypto_gcm_reqctx(req); - struct ablkcipher_request *abreq = &pctx->u.abreq; struct crypto_gcm_ghash_ctx *gctx = &pctx->ghash_ctx; unsigned int authsize = crypto_aead_authsize(aead); unsigned int cryptlen = req->cryptlen; - int err; + u32 flags = aead_request_flags(req); - if (cryptlen < authsize) - return -EINVAL; cryptlen -= authsize; - gctx->src = req->src; - gctx->cryptlen = cryptlen; - gctx->complete = gcm_dec_hash_done; - - err = gcm_hash(req, pctx); - if (err) - return err; + crypto_gcm_init_common(req); - ablkcipher_request_set_callback(abreq, aead_request_flags(req), - gcm_decrypt_done, req); - crypto_gcm_init_crypt(abreq, req, cryptlen); - err = crypto_ablkcipher_decrypt(abreq); - if (err) - return err; + gctx->src = sg_next(pctx->src); + gctx->cryptlen = cryptlen; + gctx->complete = gcm_dec_hash_continue; - return crypto_gcm_verify(req, pctx); + return gcm_hash(req, flags); } -static int crypto_gcm_init_tfm(struct crypto_tfm *tfm) +static int crypto_gcm_init_tfm(struct crypto_aead *tfm) { - struct crypto_instance *inst = (void *)tfm->__crt_alg; - struct gcm_instance_ctx *ictx = crypto_instance_ctx(inst); - struct crypto_gcm_ctx *ctx = crypto_tfm_ctx(tfm); + struct aead_instance *inst = aead_alg_instance(tfm); + struct gcm_instance_ctx *ictx = aead_instance_ctx(inst); + struct crypto_gcm_ctx *ctx = crypto_aead_ctx(tfm); struct crypto_ablkcipher *ctr; struct crypto_ahash *ghash; unsigned long align; @@ -670,9 +577,9 @@ static int crypto_gcm_init_tfm(struct crypto_tfm *tfm) ctx->ctr = ctr; ctx->ghash = ghash; - align = crypto_tfm_alg_alignmask(tfm); + align = crypto_aead_alignmask(tfm); align &= ~(crypto_tfm_ctx_alignment() - 1); - crypto_aead_set_reqsize(__crypto_aead_cast(tfm), + crypto_aead_set_reqsize(tfm, align + offsetof(struct crypto_gcm_req_priv_ctx, u) + max(sizeof(struct ablkcipher_request) + crypto_ablkcipher_reqsize(ctr), @@ -686,53 +593,59 @@ err_free_hash: return err; } -static void crypto_gcm_exit_tfm(struct crypto_tfm *tfm) +static void crypto_gcm_exit_tfm(struct crypto_aead *tfm) { - struct crypto_gcm_ctx *ctx = crypto_tfm_ctx(tfm); + struct crypto_gcm_ctx *ctx = crypto_aead_ctx(tfm); crypto_free_ahash(ctx->ghash); crypto_free_ablkcipher(ctx->ctr); } -static struct crypto_instance *crypto_gcm_alloc_common(struct rtattr **tb, - const char *full_name, - const char *ctr_name, - const char *ghash_name) +static int crypto_gcm_create_common(struct crypto_template *tmpl, + struct rtattr **tb, + const char *full_name, + const char *ctr_name, + const char *ghash_name) { struct crypto_attr_type *algt; - struct crypto_instance *inst; + struct aead_instance *inst; struct crypto_alg *ctr; struct crypto_alg *ghash_alg; - struct ahash_alg *ghash_ahash_alg; + struct hash_alg_common *ghash; struct gcm_instance_ctx *ctx; int err; algt = crypto_get_attr_type(tb); if (IS_ERR(algt)) - return ERR_CAST(algt); + return PTR_ERR(algt); if ((algt->type ^ CRYPTO_ALG_TYPE_AEAD) & algt->mask) - return ERR_PTR(-EINVAL); + return -EINVAL; ghash_alg = crypto_find_alg(ghash_name, &crypto_ahash_type, CRYPTO_ALG_TYPE_HASH, CRYPTO_ALG_TYPE_AHASH_MASK); if (IS_ERR(ghash_alg)) - return ERR_CAST(ghash_alg); + return PTR_ERR(ghash_alg); + + ghash = __crypto_hash_alg_common(ghash_alg); err = -ENOMEM; inst = kzalloc(sizeof(*inst) + sizeof(*ctx), GFP_KERNEL); if (!inst) goto out_put_ghash; - ctx = crypto_instance_ctx(inst); - ghash_ahash_alg = container_of(ghash_alg, struct ahash_alg, halg.base); - err = crypto_init_ahash_spawn(&ctx->ghash, &ghash_ahash_alg->halg, - inst); + ctx = aead_instance_ctx(inst); + err = crypto_init_ahash_spawn(&ctx->ghash, ghash, + aead_crypto_instance(inst)); if (err) goto err_free_inst; - crypto_set_skcipher_spawn(&ctx->ctr, inst); + err = -EINVAL; + if (ghash->digestsize != 16) + goto err_drop_ghash; + + crypto_set_skcipher_spawn(&ctx->ctr, aead_crypto_instance(inst)); err = crypto_grab_skcipher(&ctx->ctr, ctr_name, 0, crypto_requires_sync(algt->type, algt->mask)); @@ -751,33 +664,38 @@ static struct crypto_instance *crypto_gcm_alloc_common(struct rtattr **tb, goto out_put_ctr; err = -ENAMETOOLONG; - if (snprintf(inst->alg.cra_driver_name, CRYPTO_MAX_ALG_NAME, + if (snprintf(inst->alg.base.cra_driver_name, CRYPTO_MAX_ALG_NAME, "gcm_base(%s,%s)", ctr->cra_driver_name, ghash_alg->cra_driver_name) >= CRYPTO_MAX_ALG_NAME) goto out_put_ctr; - memcpy(inst->alg.cra_name, full_name, CRYPTO_MAX_ALG_NAME); - - inst->alg.cra_flags = CRYPTO_ALG_TYPE_AEAD; - inst->alg.cra_flags |= ctr->cra_flags & CRYPTO_ALG_ASYNC; - inst->alg.cra_priority = ctr->cra_priority; - inst->alg.cra_blocksize = 1; - inst->alg.cra_alignmask = ctr->cra_alignmask | (__alignof__(u64) - 1); - inst->alg.cra_type = &crypto_aead_type; - inst->alg.cra_aead.ivsize = 16; - inst->alg.cra_aead.maxauthsize = 16; - inst->alg.cra_ctxsize = sizeof(struct crypto_gcm_ctx); - inst->alg.cra_init = crypto_gcm_init_tfm; - inst->alg.cra_exit = crypto_gcm_exit_tfm; - inst->alg.cra_aead.setkey = crypto_gcm_setkey; - inst->alg.cra_aead.setauthsize = crypto_gcm_setauthsize; - inst->alg.cra_aead.encrypt = crypto_gcm_encrypt; - inst->alg.cra_aead.decrypt = crypto_gcm_decrypt; + memcpy(inst->alg.base.cra_name, full_name, CRYPTO_MAX_ALG_NAME); + + inst->alg.base.cra_flags = (ghash->base.cra_flags | ctr->cra_flags) & + CRYPTO_ALG_ASYNC; + inst->alg.base.cra_priority = (ghash->base.cra_priority + + ctr->cra_priority) / 2; + inst->alg.base.cra_blocksize = 1; + inst->alg.base.cra_alignmask = ghash->base.cra_alignmask | + ctr->cra_alignmask; + inst->alg.base.cra_ctxsize = sizeof(struct crypto_gcm_ctx); + inst->alg.ivsize = 12; + inst->alg.maxauthsize = 16; + inst->alg.init = crypto_gcm_init_tfm; + inst->alg.exit = crypto_gcm_exit_tfm; + inst->alg.setkey = crypto_gcm_setkey; + inst->alg.setauthsize = crypto_gcm_setauthsize; + inst->alg.encrypt = crypto_gcm_encrypt; + inst->alg.decrypt = crypto_gcm_decrypt; + + err = aead_register_instance(tmpl, inst); + if (err) + goto out_put_ctr; -out: +out_put_ghash: crypto_mod_put(ghash_alg); - return inst; + return err; out_put_ctr: crypto_drop_skcipher(&ctx->ctr); @@ -785,12 +703,10 @@ err_drop_ghash: crypto_drop_ahash(&ctx->ghash); err_free_inst: kfree(inst); -out_put_ghash: - inst = ERR_PTR(err); - goto out; + goto out_put_ghash; } -static struct crypto_instance *crypto_gcm_alloc(struct rtattr **tb) +static int crypto_gcm_create(struct crypto_template *tmpl, struct rtattr **tb) { const char *cipher_name; char ctr_name[CRYPTO_MAX_ALG_NAME]; @@ -798,17 +714,18 @@ static struct crypto_instance *crypto_gcm_alloc(struct rtattr **tb) cipher_name = crypto_attr_alg_name(tb[1]); if (IS_ERR(cipher_name)) - return ERR_CAST(cipher_name); + return PTR_ERR(cipher_name); if (snprintf(ctr_name, CRYPTO_MAX_ALG_NAME, "ctr(%s)", cipher_name) >= CRYPTO_MAX_ALG_NAME) - return ERR_PTR(-ENAMETOOLONG); + return -ENAMETOOLONG; if (snprintf(full_name, CRYPTO_MAX_ALG_NAME, "gcm(%s)", cipher_name) >= CRYPTO_MAX_ALG_NAME) - return ERR_PTR(-ENAMETOOLONG); + return -ENAMETOOLONG; - return crypto_gcm_alloc_common(tb, full_name, ctr_name, "ghash"); + return crypto_gcm_create_common(tmpl, tb, full_name, + ctr_name, "ghash"); } static void crypto_gcm_free(struct crypto_instance *inst) @@ -817,17 +734,18 @@ static void crypto_gcm_free(struct crypto_instance *inst) crypto_drop_skcipher(&ctx->ctr); crypto_drop_ahash(&ctx->ghash); - kfree(inst); + kfree(aead_instance(inst)); } static struct crypto_template crypto_gcm_tmpl = { .name = "gcm", - .alloc = crypto_gcm_alloc, + .create = crypto_gcm_create, .free = crypto_gcm_free, .module = THIS_MODULE, }; -static struct crypto_instance *crypto_gcm_base_alloc(struct rtattr **tb) +static int crypto_gcm_base_create(struct crypto_template *tmpl, + struct rtattr **tb) { const char *ctr_name; const char *ghash_name; @@ -835,22 +753,23 @@ static struct crypto_instance *crypto_gcm_base_alloc(struct rtattr **tb) ctr_name = crypto_attr_alg_name(tb[1]); if (IS_ERR(ctr_name)) - return ERR_CAST(ctr_name); + return PTR_ERR(ctr_name); ghash_name = crypto_attr_alg_name(tb[2]); if (IS_ERR(ghash_name)) - return ERR_CAST(ghash_name); + return PTR_ERR(ghash_name); if (snprintf(full_name, CRYPTO_MAX_ALG_NAME, "gcm_base(%s,%s)", ctr_name, ghash_name) >= CRYPTO_MAX_ALG_NAME) - return ERR_PTR(-ENAMETOOLONG); + return -ENAMETOOLONG; - return crypto_gcm_alloc_common(tb, full_name, ctr_name, ghash_name); + return crypto_gcm_create_common(tmpl, tb, full_name, + ctr_name, ghash_name); } static struct crypto_template crypto_gcm_base_tmpl = { .name = "gcm_base", - .alloc = crypto_gcm_base_alloc, + .create = crypto_gcm_base_create, .free = crypto_gcm_free, .module = THIS_MODULE, }; @@ -911,7 +830,7 @@ static struct aead_request *crypto_rfc4106_crypt(struct aead_request *req) aead_request_set_callback(subreq, req->base.flags, req->base.complete, req->base.data); aead_request_set_crypt(subreq, req->src, req->dst, req->cryptlen, iv); - aead_request_set_assoc(subreq, req->assoc, req->assoclen); + aead_request_set_ad(subreq, req->assoclen); return subreq; } @@ -930,11 +849,11 @@ static int crypto_rfc4106_decrypt(struct aead_request *req) return crypto_aead_decrypt(req); } -static int crypto_rfc4106_init_tfm(struct crypto_tfm *tfm) +static int crypto_rfc4106_init_tfm(struct crypto_aead *tfm) { - struct crypto_instance *inst = (void *)tfm->__crt_alg; - struct crypto_aead_spawn *spawn = crypto_instance_ctx(inst); - struct crypto_rfc4106_ctx *ctx = crypto_tfm_ctx(tfm); + struct aead_instance *inst = aead_alg_instance(tfm); + struct crypto_aead_spawn *spawn = aead_instance_ctx(inst); + struct crypto_rfc4106_ctx *ctx = crypto_aead_ctx(tfm); struct crypto_aead *aead; unsigned long align; @@ -946,126 +865,120 @@ static int crypto_rfc4106_init_tfm(struct crypto_tfm *tfm) align = crypto_aead_alignmask(aead); align &= ~(crypto_tfm_ctx_alignment() - 1); - crypto_aead_set_reqsize(__crypto_aead_cast(tfm), + crypto_aead_set_reqsize( + tfm, sizeof(struct aead_request) + ALIGN(crypto_aead_reqsize(aead), crypto_tfm_ctx_alignment()) + - align + 16); + align + 12); return 0; } -static void crypto_rfc4106_exit_tfm(struct crypto_tfm *tfm) +static void crypto_rfc4106_exit_tfm(struct crypto_aead *tfm) { - struct crypto_rfc4106_ctx *ctx = crypto_tfm_ctx(tfm); + struct crypto_rfc4106_ctx *ctx = crypto_aead_ctx(tfm); crypto_free_aead(ctx->child); } -static struct crypto_instance *crypto_rfc4106_alloc(struct rtattr **tb) +static int crypto_rfc4106_create(struct crypto_template *tmpl, + struct rtattr **tb) { struct crypto_attr_type *algt; - struct crypto_instance *inst; + struct aead_instance *inst; struct crypto_aead_spawn *spawn; - struct crypto_alg *alg; + struct aead_alg *alg; const char *ccm_name; int err; algt = crypto_get_attr_type(tb); if (IS_ERR(algt)) - return ERR_CAST(algt); + return PTR_ERR(algt); if ((algt->type ^ CRYPTO_ALG_TYPE_AEAD) & algt->mask) - return ERR_PTR(-EINVAL); + return -EINVAL; ccm_name = crypto_attr_alg_name(tb[1]); if (IS_ERR(ccm_name)) - return ERR_CAST(ccm_name); + return PTR_ERR(ccm_name); inst = kzalloc(sizeof(*inst) + sizeof(*spawn), GFP_KERNEL); if (!inst) - return ERR_PTR(-ENOMEM); + return -ENOMEM; - spawn = crypto_instance_ctx(inst); - crypto_set_aead_spawn(spawn, inst); + spawn = aead_instance_ctx(inst); + crypto_set_aead_spawn(spawn, aead_crypto_instance(inst)); err = crypto_grab_aead(spawn, ccm_name, 0, crypto_requires_sync(algt->type, algt->mask)); if (err) goto out_free_inst; - alg = crypto_aead_spawn_alg(spawn); + alg = crypto_spawn_aead_alg(spawn); err = -EINVAL; - /* We only support 16-byte blocks. */ - if (alg->cra_aead.ivsize != 16) + /* Underlying IV size must be 12. */ + if (crypto_aead_alg_ivsize(alg) != 12) goto out_drop_alg; /* Not a stream cipher? */ - if (alg->cra_blocksize != 1) + if (alg->base.cra_blocksize != 1) goto out_drop_alg; err = -ENAMETOOLONG; - if (snprintf(inst->alg.cra_name, CRYPTO_MAX_ALG_NAME, - "rfc4106(%s)", alg->cra_name) >= CRYPTO_MAX_ALG_NAME || - snprintf(inst->alg.cra_driver_name, CRYPTO_MAX_ALG_NAME, - "rfc4106(%s)", alg->cra_driver_name) >= + if (snprintf(inst->alg.base.cra_name, CRYPTO_MAX_ALG_NAME, + "rfc4106(%s)", alg->base.cra_name) >= + CRYPTO_MAX_ALG_NAME || + snprintf(inst->alg.base.cra_driver_name, CRYPTO_MAX_ALG_NAME, + "rfc4106(%s)", alg->base.cra_driver_name) >= CRYPTO_MAX_ALG_NAME) goto out_drop_alg; - inst->alg.cra_flags = CRYPTO_ALG_TYPE_AEAD; - inst->alg.cra_flags |= alg->cra_flags & CRYPTO_ALG_ASYNC; - inst->alg.cra_priority = alg->cra_priority; - inst->alg.cra_blocksize = 1; - inst->alg.cra_alignmask = alg->cra_alignmask; - inst->alg.cra_type = &crypto_nivaead_type; + inst->alg.base.cra_flags |= alg->base.cra_flags & CRYPTO_ALG_ASYNC; + inst->alg.base.cra_priority = alg->base.cra_priority; + inst->alg.base.cra_blocksize = 1; + inst->alg.base.cra_alignmask = alg->base.cra_alignmask; - inst->alg.cra_aead.ivsize = 8; - inst->alg.cra_aead.maxauthsize = 16; + inst->alg.base.cra_ctxsize = sizeof(struct crypto_rfc4106_ctx); - inst->alg.cra_ctxsize = sizeof(struct crypto_rfc4106_ctx); + inst->alg.ivsize = 8; + inst->alg.maxauthsize = crypto_aead_alg_maxauthsize(alg); - inst->alg.cra_init = crypto_rfc4106_init_tfm; - inst->alg.cra_exit = crypto_rfc4106_exit_tfm; + inst->alg.init = crypto_rfc4106_init_tfm; + inst->alg.exit = crypto_rfc4106_exit_tfm; - inst->alg.cra_aead.setkey = crypto_rfc4106_setkey; - inst->alg.cra_aead.setauthsize = crypto_rfc4106_setauthsize; - inst->alg.cra_aead.encrypt = crypto_rfc4106_encrypt; - inst->alg.cra_aead.decrypt = crypto_rfc4106_decrypt; + inst->alg.setkey = crypto_rfc4106_setkey; + inst->alg.setauthsize = crypto_rfc4106_setauthsize; + inst->alg.encrypt = crypto_rfc4106_encrypt; + inst->alg.decrypt = crypto_rfc4106_decrypt; - inst->alg.cra_aead.geniv = "seqiv"; + err = aead_register_instance(tmpl, inst); + if (err) + goto out_drop_alg; out: - return inst; + return err; out_drop_alg: crypto_drop_aead(spawn); out_free_inst: kfree(inst); - inst = ERR_PTR(err); goto out; } static void crypto_rfc4106_free(struct crypto_instance *inst) { - crypto_drop_spawn(crypto_instance_ctx(inst)); - kfree(inst); + crypto_drop_aead(crypto_instance_ctx(inst)); + kfree(aead_instance(inst)); } static struct crypto_template crypto_rfc4106_tmpl = { .name = "rfc4106", - .alloc = crypto_rfc4106_alloc, + .create = crypto_rfc4106_create, .free = crypto_rfc4106_free, .module = THIS_MODULE, }; -static inline struct crypto_rfc4543_req_ctx *crypto_rfc4543_reqctx( - struct aead_request *req) -{ - unsigned long align = crypto_aead_alignmask(crypto_aead_reqtfm(req)); - - return (void *)PTR_ALIGN((u8 *)aead_request_ctx(req), align + 1); -} - static int crypto_rfc4543_setkey(struct crypto_aead *parent, const u8 *key, unsigned int keylen) { @@ -1100,83 +1013,35 @@ static int crypto_rfc4543_setauthsize(struct crypto_aead *parent, return crypto_aead_setauthsize(ctx->child, authsize); } -static void crypto_rfc4543_done(struct crypto_async_request *areq, int err) -{ - struct aead_request *req = areq->data; - struct crypto_aead *aead = crypto_aead_reqtfm(req); - struct crypto_rfc4543_req_ctx *rctx = crypto_rfc4543_reqctx(req); - - if (!err) { - scatterwalk_map_and_copy(rctx->auth_tag, req->dst, - req->cryptlen, - crypto_aead_authsize(aead), 1); - } - - aead_request_complete(req, err); -} - -static struct aead_request *crypto_rfc4543_crypt(struct aead_request *req, - bool enc) +static int crypto_rfc4543_crypt(struct aead_request *req, bool enc) { struct crypto_aead *aead = crypto_aead_reqtfm(req); struct crypto_rfc4543_ctx *ctx = crypto_aead_ctx(aead); - struct crypto_rfc4543_req_ctx *rctx = crypto_rfc4543_reqctx(req); + struct crypto_rfc4543_req_ctx *rctx = aead_request_ctx(req); struct aead_request *subreq = &rctx->subreq; - struct scatterlist *src = req->src; - struct scatterlist *cipher = rctx->cipher; - struct scatterlist *payload = rctx->payload; - struct scatterlist *assoc = rctx->assoc; unsigned int authsize = crypto_aead_authsize(aead); - unsigned int assoclen = req->assoclen; - struct page *srcp; - u8 *vsrc; u8 *iv = PTR_ALIGN((u8 *)(rctx + 1) + crypto_aead_reqsize(ctx->child), crypto_aead_alignmask(ctx->child) + 1); + int err; + + if (req->src != req->dst) { + err = crypto_rfc4543_copy_src_to_dst(req, enc); + if (err) + return err; + } memcpy(iv, ctx->nonce, 4); memcpy(iv + 4, req->iv, 8); - /* construct cipher/plaintext */ - if (enc) - memset(rctx->auth_tag, 0, authsize); - else - scatterwalk_map_and_copy(rctx->auth_tag, src, - req->cryptlen - authsize, - authsize, 0); - - sg_init_one(cipher, rctx->auth_tag, authsize); - - /* construct the aad */ - srcp = sg_page(src); - vsrc = PageHighMem(srcp) ? NULL : page_address(srcp) + src->offset; - - sg_init_table(payload, 2); - sg_set_buf(payload, req->iv, 8); - scatterwalk_crypto_chain(payload, src, vsrc == req->iv + 8, 2); - assoclen += 8 + req->cryptlen - (enc ? 0 : authsize); - - if (req->assoc->length == req->assoclen) { - sg_init_table(assoc, 2); - sg_set_page(assoc, sg_page(req->assoc), req->assoc->length, - req->assoc->offset); - } else { - BUG_ON(req->assoclen > sizeof(rctx->assocbuf)); - - scatterwalk_map_and_copy(rctx->assocbuf, req->assoc, 0, - req->assoclen, 0); - - sg_init_table(assoc, 2); - sg_set_buf(assoc, rctx->assocbuf, req->assoclen); - } - scatterwalk_crypto_chain(assoc, payload, 0, 2); - aead_request_set_tfm(subreq, ctx->child); - aead_request_set_callback(subreq, req->base.flags, crypto_rfc4543_done, - req); - aead_request_set_crypt(subreq, cipher, cipher, enc ? 0 : authsize, iv); - aead_request_set_assoc(subreq, assoc, assoclen); - - return subreq; + aead_request_set_callback(subreq, req->base.flags, + req->base.complete, req->base.data); + aead_request_set_crypt(subreq, req->src, req->dst, + enc ? 0 : authsize, iv); + aead_request_set_ad(subreq, req->assoclen + req->cryptlen - + subreq->cryptlen); + + return enc ? crypto_aead_encrypt(subreq) : crypto_aead_decrypt(subreq); } static int crypto_rfc4543_copy_src_to_dst(struct aead_request *req, bool enc) @@ -1184,7 +1049,8 @@ static int crypto_rfc4543_copy_src_to_dst(struct aead_request *req, bool enc) struct crypto_aead *aead = crypto_aead_reqtfm(req); struct crypto_rfc4543_ctx *ctx = crypto_aead_ctx(aead); unsigned int authsize = crypto_aead_authsize(aead); - unsigned int nbytes = req->cryptlen - (enc ? 0 : authsize); + unsigned int nbytes = req->assoclen + req->cryptlen - + (enc ? 0 : authsize); struct blkcipher_desc desc = { .tfm = ctx->null, }; @@ -1194,49 +1060,20 @@ static int crypto_rfc4543_copy_src_to_dst(struct aead_request *req, bool enc) static int crypto_rfc4543_encrypt(struct aead_request *req) { - struct crypto_aead *aead = crypto_aead_reqtfm(req); - struct crypto_rfc4543_req_ctx *rctx = crypto_rfc4543_reqctx(req); - struct aead_request *subreq; - int err; - - if (req->src != req->dst) { - err = crypto_rfc4543_copy_src_to_dst(req, true); - if (err) - return err; - } - - subreq = crypto_rfc4543_crypt(req, true); - err = crypto_aead_encrypt(subreq); - if (err) - return err; - - scatterwalk_map_and_copy(rctx->auth_tag, req->dst, req->cryptlen, - crypto_aead_authsize(aead), 1); - - return 0; + return crypto_rfc4543_crypt(req, true); } static int crypto_rfc4543_decrypt(struct aead_request *req) { - int err; - - if (req->src != req->dst) { - err = crypto_rfc4543_copy_src_to_dst(req, false); - if (err) - return err; - } - - req = crypto_rfc4543_crypt(req, false); - - return crypto_aead_decrypt(req); + return crypto_rfc4543_crypt(req, false); } -static int crypto_rfc4543_init_tfm(struct crypto_tfm *tfm) +static int crypto_rfc4543_init_tfm(struct crypto_aead *tfm) { - struct crypto_instance *inst = (void *)tfm->__crt_alg; - struct crypto_rfc4543_instance_ctx *ictx = crypto_instance_ctx(inst); + struct aead_instance *inst = aead_alg_instance(tfm); + struct crypto_rfc4543_instance_ctx *ictx = aead_instance_ctx(inst); struct crypto_aead_spawn *spawn = &ictx->aead; - struct crypto_rfc4543_ctx *ctx = crypto_tfm_ctx(tfm); + struct crypto_rfc4543_ctx *ctx = crypto_aead_ctx(tfm); struct crypto_aead *aead; struct crypto_blkcipher *null; unsigned long align; @@ -1256,10 +1093,11 @@ static int crypto_rfc4543_init_tfm(struct crypto_tfm *tfm) align = crypto_aead_alignmask(aead); align &= ~(crypto_tfm_ctx_alignment() - 1); - crypto_aead_set_reqsize(__crypto_aead_cast(tfm), + crypto_aead_set_reqsize( + tfm, sizeof(struct crypto_rfc4543_req_ctx) + ALIGN(crypto_aead_reqsize(aead), crypto_tfm_ctx_alignment()) + - align + 16); + align + 12); return 0; @@ -1268,97 +1106,98 @@ err_free_aead: return err; } -static void crypto_rfc4543_exit_tfm(struct crypto_tfm *tfm) +static void crypto_rfc4543_exit_tfm(struct crypto_aead *tfm) { - struct crypto_rfc4543_ctx *ctx = crypto_tfm_ctx(tfm); + struct crypto_rfc4543_ctx *ctx = crypto_aead_ctx(tfm); crypto_free_aead(ctx->child); crypto_put_default_null_skcipher(); } -static struct crypto_instance *crypto_rfc4543_alloc(struct rtattr **tb) +static int crypto_rfc4543_create(struct crypto_template *tmpl, + struct rtattr **tb) { struct crypto_attr_type *algt; - struct crypto_instance *inst; + struct aead_instance *inst; struct crypto_aead_spawn *spawn; - struct crypto_alg *alg; + struct aead_alg *alg; struct crypto_rfc4543_instance_ctx *ctx; const char *ccm_name; int err; algt = crypto_get_attr_type(tb); if (IS_ERR(algt)) - return ERR_CAST(algt); + return PTR_ERR(algt); if ((algt->type ^ CRYPTO_ALG_TYPE_AEAD) & algt->mask) - return ERR_PTR(-EINVAL); + return -EINVAL; ccm_name = crypto_attr_alg_name(tb[1]); if (IS_ERR(ccm_name)) - return ERR_CAST(ccm_name); + return PTR_ERR(ccm_name); inst = kzalloc(sizeof(*inst) + sizeof(*ctx), GFP_KERNEL); if (!inst) - return ERR_PTR(-ENOMEM); + return -ENOMEM; - ctx = crypto_instance_ctx(inst); + ctx = aead_instance_ctx(inst); spawn = &ctx->aead; - crypto_set_aead_spawn(spawn, inst); + crypto_set_aead_spawn(spawn, aead_crypto_instance(inst)); err = crypto_grab_aead(spawn, ccm_name, 0, crypto_requires_sync(algt->type, algt->mask)); if (err) goto out_free_inst; - alg = crypto_aead_spawn_alg(spawn); + alg = crypto_spawn_aead_alg(spawn); err = -EINVAL; - /* We only support 16-byte blocks. */ - if (alg->cra_aead.ivsize != 16) + /* Underlying IV size must be 12. */ + if (crypto_aead_alg_ivsize(alg) != 12) goto out_drop_alg; /* Not a stream cipher? */ - if (alg->cra_blocksize != 1) + if (alg->base.cra_blocksize != 1) goto out_drop_alg; err = -ENAMETOOLONG; - if (snprintf(inst->alg.cra_name, CRYPTO_MAX_ALG_NAME, - "rfc4543(%s)", alg->cra_name) >= CRYPTO_MAX_ALG_NAME || - snprintf(inst->alg.cra_driver_name, CRYPTO_MAX_ALG_NAME, - "rfc4543(%s)", alg->cra_driver_name) >= + if (snprintf(inst->alg.base.cra_name, CRYPTO_MAX_ALG_NAME, + "rfc4543(%s)", alg->base.cra_name) >= + CRYPTO_MAX_ALG_NAME || + snprintf(inst->alg.base.cra_driver_name, CRYPTO_MAX_ALG_NAME, + "rfc4543(%s)", alg->base.cra_driver_name) >= CRYPTO_MAX_ALG_NAME) goto out_drop_alg; - inst->alg.cra_flags = CRYPTO_ALG_TYPE_AEAD; - inst->alg.cra_flags |= alg->cra_flags & CRYPTO_ALG_ASYNC; - inst->alg.cra_priority = alg->cra_priority; - inst->alg.cra_blocksize = 1; - inst->alg.cra_alignmask = alg->cra_alignmask; - inst->alg.cra_type = &crypto_nivaead_type; + inst->alg.base.cra_flags = alg->base.cra_flags & CRYPTO_ALG_ASYNC; + inst->alg.base.cra_priority = alg->base.cra_priority; + inst->alg.base.cra_blocksize = 1; + inst->alg.base.cra_alignmask = alg->base.cra_alignmask; - inst->alg.cra_aead.ivsize = 8; - inst->alg.cra_aead.maxauthsize = 16; + inst->alg.base.cra_ctxsize = sizeof(struct crypto_rfc4543_ctx); - inst->alg.cra_ctxsize = sizeof(struct crypto_rfc4543_ctx); + inst->alg.ivsize = 8; + inst->alg.maxauthsize = crypto_aead_alg_maxauthsize(alg); - inst->alg.cra_init = crypto_rfc4543_init_tfm; - inst->alg.cra_exit = crypto_rfc4543_exit_tfm; + inst->alg.init = crypto_rfc4543_init_tfm; + inst->alg.exit = crypto_rfc4543_exit_tfm; - inst->alg.cra_aead.setkey = crypto_rfc4543_setkey; - inst->alg.cra_aead.setauthsize = crypto_rfc4543_setauthsize; - inst->alg.cra_aead.encrypt = crypto_rfc4543_encrypt; - inst->alg.cra_aead.decrypt = crypto_rfc4543_decrypt; + inst->alg.setkey = crypto_rfc4543_setkey; + inst->alg.setauthsize = crypto_rfc4543_setauthsize; + inst->alg.encrypt = crypto_rfc4543_encrypt; + inst->alg.decrypt = crypto_rfc4543_decrypt; - inst->alg.cra_aead.geniv = "seqiv"; + err = aead_register_instance(tmpl, inst); + if (err) + goto out_drop_alg; out: - return inst; + return err; out_drop_alg: crypto_drop_aead(spawn); out_free_inst: kfree(inst); - inst = ERR_PTR(err); goto out; } @@ -1368,12 +1207,12 @@ static void crypto_rfc4543_free(struct crypto_instance *inst) crypto_drop_aead(&ctx->aead); - kfree(inst); + kfree(aead_instance(inst)); } static struct crypto_template crypto_rfc4543_tmpl = { .name = "rfc4543", - .alloc = crypto_rfc4543_alloc, + .create = crypto_rfc4543_create, .free = crypto_rfc4543_free, .module = THIS_MODULE, }; @@ -1382,10 +1221,12 @@ static int __init crypto_gcm_module_init(void) { int err; - gcm_zeroes = kzalloc(16, GFP_KERNEL); + gcm_zeroes = kzalloc(sizeof(*gcm_zeroes), GFP_KERNEL); if (!gcm_zeroes) return -ENOMEM; + sg_init_one(&gcm_zeroes->sg, gcm_zeroes->buf, sizeof(gcm_zeroes->buf)); + err = crypto_register_template(&crypto_gcm_base_tmpl); if (err) goto out; |
