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crypto: essiv - Handle lskcipher spawns

Browse source 
Add code to handle an underlying lskcihper object when grabbing
an skcipher spawn.

Fixes: 31865c4c4d ("crypto: skcipher - Add lskcipher")
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Herbert Xu 2023-10-03 11:43:20 +08:00
parent ab6223dc3e
commit 4822ed7e85
1 changed files with 10 additions and 10 deletions
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20
crypto/essiv.c
View file

@ -442,6 +442,7 @@ static bool essiv_supported_algorithms(const char *essiv_cipher_name,
static int essiv_create(struct crypto_template *tmpl, struct rtattr **tb)
{
struct skcipher_alg_common *skcipher_alg = NULL;
struct crypto_attr_type *algt;
const char *inner_cipher_name;
const char *shash_name;
@ -450,7 +451,6 @@ static int essiv_create(struct crypto_template *tmpl, struct rtattr **tb)
struct crypto_instance *inst;
struct crypto_alg *base, *block_base;
struct essiv_instance_ctx *ictx;
struct skcipher_alg *skcipher_alg = NULL;
struct aead_alg *aead_alg = NULL;
struct crypto_alg *_hash_alg;
struct shash_alg *hash_alg;
@ -475,7 +475,7 @@ static int essiv_create(struct crypto_template *tmpl, struct rtattr **tb)
mask = crypto_algt_inherited_mask(algt);
switch (type) {
case CRYPTO_ALG_TYPE_SKCIPHER:
case CRYPTO_ALG_TYPE_LSKCIPHER:
skcipher_inst = kzalloc(sizeof(*skcipher_inst) +
sizeof(*ictx), GFP_KERNEL);
if (!skcipher_inst)
@ -489,9 +489,10 @@ static int essiv_create(struct crypto_template *tmpl, struct rtattr **tb)
inner_cipher_name, 0, mask);
if (err)
goto out_free_inst;
skcipher_alg = crypto_spawn_skcipher_alg(&ictx->u.skcipher_spawn);
skcipher_alg = crypto_spawn_skcipher_alg_common(
&ictx->u.skcipher_spawn);
block_base = &skcipher_alg->base;
ivsize = crypto_skcipher_alg_ivsize(skcipher_alg);
ivsize = skcipher_alg->ivsize;
break;
case CRYPTO_ALG_TYPE_AEAD:
@ -574,18 +575,17 @@ static int essiv_create(struct crypto_template *tmpl, struct rtattr **tb)
base->cra_alignmask = block_base->cra_alignmask;
base->cra_priority = block_base->cra_priority;
if (type == CRYPTO_ALG_TYPE_SKCIPHER) {
if (type == CRYPTO_ALG_TYPE_LSKCIPHER) {
skcipher_inst->alg.setkey = essiv_skcipher_setkey;
skcipher_inst->alg.encrypt = essiv_skcipher_encrypt;
skcipher_inst->alg.decrypt = essiv_skcipher_decrypt;
skcipher_inst->alg.init = essiv_skcipher_init_tfm;
skcipher_inst->alg.exit = essiv_skcipher_exit_tfm;
skcipher_inst->alg.min_keysize = crypto_skcipher_alg_min_keysize(skcipher_alg);
skcipher_inst->alg.max_keysize = crypto_skcipher_alg_max_keysize(skcipher_alg);
skcipher_inst->alg.min_keysize = skcipher_alg->min_keysize;
skcipher_inst->alg.max_keysize = skcipher_alg->max_keysize;
skcipher_inst->alg.ivsize = ivsize;
skcipher_inst->alg.chunksize = crypto_skcipher_alg_chunksize(skcipher_alg);
skcipher_inst->alg.walksize = crypto_skcipher_alg_walksize(skcipher_alg);
skcipher_inst->alg.chunksize = skcipher_alg->chunksize;
skcipher_inst->free = essiv_skcipher_free_instance;
@ -616,7 +616,7 @@ static int essiv_create(struct crypto_template *tmpl, struct rtattr **tb)
out_free_hash:
crypto_mod_put(_hash_alg);
out_drop_skcipher:
if (type == CRYPTO_ALG_TYPE_SKCIPHER)
if (type == CRYPTO_ALG_TYPE_LSKCIPHER)
crypto_drop_skcipher(&ictx->u.skcipher_spawn);
else
crypto_drop_aead(&ictx->u.aead_spawn);