diff options
Diffstat (limited to 'crypto/shash.c')
| -rw-r--r-- | crypto/shash.c | 39 |
1 files changed, 28 insertions, 11 deletions
diff --git a/crypto/shash.c b/crypto/shash.c index 131e14d2b57..d8e0f8f8d67 100644 --- a/crypto/shash.c +++ b/crypto/shash.c @@ -300,14 +300,16 @@ static int crypto_init_shash_ops_async(struct crypto_tfm *tfm) static int shash_compat_setkey(struct crypto_hash *tfm, const u8 *key, unsigned int keylen) { - struct shash_desc *desc = crypto_hash_ctx(tfm); + struct shash_desc **descp = crypto_hash_ctx(tfm); + struct shash_desc *desc = *descp; return crypto_shash_setkey(desc->tfm, key, keylen); } static int shash_compat_init(struct hash_desc *hdesc) { - struct shash_desc *desc = crypto_hash_ctx(hdesc->tfm); + struct shash_desc **descp = crypto_hash_ctx(hdesc->tfm); + struct shash_desc *desc = *descp; desc->flags = hdesc->flags; @@ -317,7 +319,8 @@ static int shash_compat_init(struct hash_desc *hdesc) static int shash_compat_update(struct hash_desc *hdesc, struct scatterlist *sg, unsigned int len) { - struct shash_desc *desc = crypto_hash_ctx(hdesc->tfm); + struct shash_desc **descp = crypto_hash_ctx(hdesc->tfm); + struct shash_desc *desc = *descp; struct crypto_hash_walk walk; int nbytes; @@ -330,7 +333,9 @@ static int shash_compat_update(struct hash_desc *hdesc, struct scatterlist *sg, static int shash_compat_final(struct hash_desc *hdesc, u8 *out) { - return crypto_shash_final(crypto_hash_ctx(hdesc->tfm), out); + struct shash_desc **descp = crypto_hash_ctx(hdesc->tfm); + + return crypto_shash_final(*descp, out); } static int shash_compat_digest(struct hash_desc *hdesc, struct scatterlist *sg, @@ -340,7 +345,8 @@ static int shash_compat_digest(struct hash_desc *hdesc, struct scatterlist *sg, int err; if (nbytes < min(sg->length, ((unsigned int)(PAGE_SIZE)) - offset)) { - struct shash_desc *desc = crypto_hash_ctx(hdesc->tfm); + struct shash_desc **descp = crypto_hash_ctx(hdesc->tfm); + struct shash_desc *desc = *descp; void *data; desc->flags = hdesc->flags; @@ -368,9 +374,11 @@ out: static void crypto_exit_shash_ops_compat(struct crypto_tfm *tfm) { - struct shash_desc *desc= crypto_tfm_ctx(tfm); + struct shash_desc **descp = crypto_tfm_ctx(tfm); + struct shash_desc *desc = *descp; crypto_free_shash(desc->tfm); + kzfree(desc); } static int crypto_init_shash_ops_compat(struct crypto_tfm *tfm) @@ -378,8 +386,9 @@ static int crypto_init_shash_ops_compat(struct crypto_tfm *tfm) struct hash_tfm *crt = &tfm->crt_hash; struct crypto_alg *calg = tfm->__crt_alg; struct shash_alg *alg = __crypto_shash_alg(calg); - struct shash_desc *desc = crypto_tfm_ctx(tfm); + struct shash_desc **descp = crypto_tfm_ctx(tfm); struct crypto_shash *shash; + struct shash_desc *desc; if (!crypto_mod_get(calg)) return -EAGAIN; @@ -390,6 +399,14 @@ static int crypto_init_shash_ops_compat(struct crypto_tfm *tfm) return PTR_ERR(shash); } + desc = kmalloc(sizeof(*desc) + crypto_shash_descsize(shash), + GFP_KERNEL); + if (!desc) { + crypto_free_shash(shash); + return -ENOMEM; + } + + *descp = desc; desc->tfm = shash; tfm->exit = crypto_exit_shash_ops_compat; @@ -419,11 +436,9 @@ static int crypto_init_shash_ops(struct crypto_tfm *tfm, u32 type, u32 mask) static unsigned int crypto_shash_ctxsize(struct crypto_alg *alg, u32 type, u32 mask) { - struct shash_alg *salg = __crypto_shash_alg(alg); - switch (mask & CRYPTO_ALG_TYPE_MASK) { case CRYPTO_ALG_TYPE_HASH_MASK: - return sizeof(struct shash_desc) + salg->descsize; + return sizeof(struct shash_desc *); case CRYPTO_ALG_TYPE_AHASH_MASK: return sizeof(struct crypto_shash *); } @@ -434,6 +449,9 @@ static unsigned int crypto_shash_ctxsize(struct crypto_alg *alg, u32 type, static int crypto_shash_init_tfm(struct crypto_tfm *tfm, const struct crypto_type *frontend) { + struct crypto_shash *hash = __crypto_shash_cast(tfm); + + hash->descsize = crypto_shash_alg(hash)->descsize; return 0; } @@ -452,7 +470,6 @@ static void crypto_shash_show(struct seq_file *m, struct crypto_alg *alg) seq_printf(m, "type : shash\n"); seq_printf(m, "blocksize : %u\n", alg->cra_blocksize); seq_printf(m, "digestsize : %u\n", salg->digestsize); - seq_printf(m, "descsize : %u\n", salg->descsize); } static const struct crypto_type crypto_shash_type = { |