diff options
author | Herbert Xu <herbert@gondor.apana.org.au> | 2016-07-12 13:17:50 +0800 |
---|---|---|
committer | Herbert Xu <herbert@gondor.apana.org.au> | 2016-07-18 17:35:46 +0800 |
commit | 3a01d0ee2b991c8c267620e63a4ab47cd8c30cc4 (patch) | |
tree | 5c8d3aa7fb5fbaa3ae9d80883e9057c0395b7def /crypto/seqiv.c | |
parent | 6cf80a296575723aed6ce6c695581540202bfc6b (diff) | |
download | op-kernel-dev-3a01d0ee2b991c8c267620e63a4ab47cd8c30cc4.zip op-kernel-dev-3a01d0ee2b991c8c267620e63a4ab47cd8c30cc4.tar.gz |
crypto: skcipher - Remove top-level givcipher interface
This patch removes the old crypto_grab_skcipher helper and replaces
it with crypto_grab_skcipher2.
As this is the final entry point into givcipher this patch also
removes all traces of the top-level givcipher interface, including
all implicit IV generators such as chainiv.
The bottom-level givcipher interface remains until the drivers
using it are converted.
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'crypto/seqiv.c')
-rw-r--r-- | crypto/seqiv.c | 162 |
1 files changed, 4 insertions, 158 deletions
diff --git a/crypto/seqiv.c b/crypto/seqiv.c index a859b3a..c704923 100644 --- a/crypto/seqiv.c +++ b/crypto/seqiv.c @@ -14,50 +14,17 @@ */ #include <crypto/internal/geniv.h> -#include <crypto/internal/skcipher.h> -#include <crypto/rng.h> #include <crypto/scatterwalk.h> +#include <crypto/skcipher.h> #include <linux/err.h> #include <linux/init.h> #include <linux/kernel.h> #include <linux/module.h> #include <linux/slab.h> -#include <linux/spinlock.h> #include <linux/string.h> -struct seqiv_ctx { - spinlock_t lock; - u8 salt[] __attribute__ ((aligned(__alignof__(u32)))); -}; - static void seqiv_free(struct crypto_instance *inst); -static void seqiv_complete2(struct skcipher_givcrypt_request *req, int err) -{ - struct ablkcipher_request *subreq = skcipher_givcrypt_reqctx(req); - struct crypto_ablkcipher *geniv; - - if (err == -EINPROGRESS) - return; - - if (err) - goto out; - - geniv = skcipher_givcrypt_reqtfm(req); - memcpy(req->creq.info, subreq->info, crypto_ablkcipher_ivsize(geniv)); - -out: - kfree(subreq->info); -} - -static void seqiv_complete(struct crypto_async_request *base, int err) -{ - struct skcipher_givcrypt_request *req = base->data; - - seqiv_complete2(req, err); - skcipher_givcrypt_complete(req, err); -} - static void seqiv_aead_encrypt_complete2(struct aead_request *req, int err) { struct aead_request *subreq = aead_request_ctx(req); @@ -85,65 +52,6 @@ static void seqiv_aead_encrypt_complete(struct crypto_async_request *base, aead_request_complete(req, err); } -static void seqiv_geniv(struct seqiv_ctx *ctx, u8 *info, u64 seq, - unsigned int ivsize) -{ - unsigned int len = ivsize; - - if (ivsize > sizeof(u64)) { - memset(info, 0, ivsize - sizeof(u64)); - len = sizeof(u64); - } - seq = cpu_to_be64(seq); - memcpy(info + ivsize - len, &seq, len); - crypto_xor(info, ctx->salt, ivsize); -} - -static int seqiv_givencrypt(struct skcipher_givcrypt_request *req) -{ - struct crypto_ablkcipher *geniv = skcipher_givcrypt_reqtfm(req); - struct seqiv_ctx *ctx = crypto_ablkcipher_ctx(geniv); - struct ablkcipher_request *subreq = skcipher_givcrypt_reqctx(req); - crypto_completion_t compl; - void *data; - u8 *info; - unsigned int ivsize; - int err; - - ablkcipher_request_set_tfm(subreq, skcipher_geniv_cipher(geniv)); - - compl = req->creq.base.complete; - data = req->creq.base.data; - info = req->creq.info; - - ivsize = crypto_ablkcipher_ivsize(geniv); - - if (unlikely(!IS_ALIGNED((unsigned long)info, - crypto_ablkcipher_alignmask(geniv) + 1))) { - info = kmalloc(ivsize, req->creq.base.flags & - CRYPTO_TFM_REQ_MAY_SLEEP ? GFP_KERNEL: - GFP_ATOMIC); - if (!info) - return -ENOMEM; - - compl = seqiv_complete; - data = req; - } - - ablkcipher_request_set_callback(subreq, req->creq.base.flags, compl, - data); - ablkcipher_request_set_crypt(subreq, req->creq.src, req->creq.dst, - req->creq.nbytes, info); - - seqiv_geniv(ctx, info, req->seq, ivsize); - memcpy(req->giv, info, ivsize); - - err = crypto_ablkcipher_encrypt(subreq); - if (unlikely(info != req->creq.info)) - seqiv_complete2(req, err); - return err; -} - static int seqiv_aead_encrypt(struct aead_request *req) { struct crypto_aead *geniv = crypto_aead_reqtfm(req); @@ -233,62 +141,6 @@ static int seqiv_aead_decrypt(struct aead_request *req) return crypto_aead_decrypt(subreq); } -static int seqiv_init(struct crypto_tfm *tfm) -{ - struct crypto_ablkcipher *geniv = __crypto_ablkcipher_cast(tfm); - struct seqiv_ctx *ctx = crypto_ablkcipher_ctx(geniv); - int err; - - spin_lock_init(&ctx->lock); - - tfm->crt_ablkcipher.reqsize = sizeof(struct ablkcipher_request); - - err = 0; - if (!crypto_get_default_rng()) { - crypto_ablkcipher_crt(geniv)->givencrypt = seqiv_givencrypt; - err = crypto_rng_get_bytes(crypto_default_rng, ctx->salt, - crypto_ablkcipher_ivsize(geniv)); - crypto_put_default_rng(); - } - - return err ?: skcipher_geniv_init(tfm); -} - -static int seqiv_ablkcipher_create(struct crypto_template *tmpl, - struct rtattr **tb) -{ - struct crypto_instance *inst; - int err; - - inst = skcipher_geniv_alloc(tmpl, tb, 0, 0); - - if (IS_ERR(inst)) - return PTR_ERR(inst); - - err = -EINVAL; - if (inst->alg.cra_ablkcipher.ivsize < sizeof(u64)) - goto free_inst; - - inst->alg.cra_init = seqiv_init; - inst->alg.cra_exit = skcipher_geniv_exit; - - inst->alg.cra_ctxsize += inst->alg.cra_ablkcipher.ivsize; - inst->alg.cra_ctxsize += sizeof(struct seqiv_ctx); - - inst->alg.cra_alignmask |= __alignof__(u32) - 1; - - err = crypto_register_instance(tmpl, inst); - if (err) - goto free_inst; - -out: - return err; - -free_inst: - skcipher_geniv_free(inst); - goto out; -} - static int seqiv_aead_create(struct crypto_template *tmpl, struct rtattr **tb) { struct aead_instance *inst; @@ -334,26 +186,20 @@ free_inst: static int seqiv_create(struct crypto_template *tmpl, struct rtattr **tb) { struct crypto_attr_type *algt; - int err; algt = crypto_get_attr_type(tb); if (IS_ERR(algt)) return PTR_ERR(algt); if ((algt->type ^ CRYPTO_ALG_TYPE_AEAD) & CRYPTO_ALG_TYPE_MASK) - err = seqiv_ablkcipher_create(tmpl, tb); - else - err = seqiv_aead_create(tmpl, tb); + return -EINVAL; - return err; + return seqiv_aead_create(tmpl, tb); } static void seqiv_free(struct crypto_instance *inst) { - if ((inst->alg.cra_flags ^ CRYPTO_ALG_TYPE_AEAD) & CRYPTO_ALG_TYPE_MASK) - skcipher_geniv_free(inst); - else - aead_geniv_free(aead_instance(inst)); + aead_geniv_free(aead_instance(inst)); } static struct crypto_template seqiv_tmpl = { |