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author | Herbert Xu <herbert@gondor.apana.org.au> | 2009-07-14 14:06:06 +0800 |
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committer | Herbert Xu <herbert@gondor.apana.org.au> | 2009-07-14 15:54:09 +0800 |
commit | 01c2dece4316dadc0f9fad1ad0b56d493980e492 (patch) | |
tree | 0d28b58ef64c4b286351ff18adc96899baac5ab8 /crypto/ahash.c | |
parent | 88056ec346ccf41f63dbc7080b24b5fd19d1358d (diff) | |
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crypto: ahash - Add instance/spawn support
This patch adds support for creating ahash instances and using
ahash as spawns.
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'crypto/ahash.c')
-rw-r--r-- | crypto/ahash.c | 72 |
1 files changed, 72 insertions, 0 deletions
diff --git a/crypto/ahash.c b/crypto/ahash.c index 8385193..7f599d2 100644 --- a/crypto/ahash.c +++ b/crypto/ahash.c @@ -259,5 +259,77 @@ struct crypto_ahash *crypto_alloc_ahash(const char *alg_name, u32 type, } EXPORT_SYMBOL_GPL(crypto_alloc_ahash); +static int ahash_prepare_alg(struct ahash_alg *alg) +{ + struct crypto_alg *base = &alg->halg.base; + + if (alg->halg.digestsize > PAGE_SIZE / 8 || + alg->halg.statesize > PAGE_SIZE / 8) + return -EINVAL; + + base->cra_type = &crypto_ahash_type; + base->cra_flags &= ~CRYPTO_ALG_TYPE_MASK; + base->cra_flags |= CRYPTO_ALG_TYPE_AHASH; + + return 0; +} + +int crypto_register_ahash(struct ahash_alg *alg) +{ + struct crypto_alg *base = &alg->halg.base; + int err; + + err = ahash_prepare_alg(alg); + if (err) + return err; + + return crypto_register_alg(base); +} +EXPORT_SYMBOL_GPL(crypto_register_ahash); + +int crypto_unregister_ahash(struct ahash_alg *alg) +{ + return crypto_unregister_alg(&alg->halg.base); +} +EXPORT_SYMBOL_GPL(crypto_unregister_ahash); + +int ahash_register_instance(struct crypto_template *tmpl, + struct ahash_instance *inst) +{ + int err; + + err = ahash_prepare_alg(&inst->alg); + if (err) + return err; + + return crypto_register_instance(tmpl, ahash_crypto_instance(inst)); +} +EXPORT_SYMBOL_GPL(ahash_register_instance); + +void ahash_free_instance(struct crypto_instance *inst) +{ + crypto_drop_spawn(crypto_instance_ctx(inst)); + kfree(ahash_instance(inst)); +} +EXPORT_SYMBOL_GPL(ahash_free_instance); + +int crypto_init_ahash_spawn(struct crypto_ahash_spawn *spawn, + struct hash_alg_common *alg, + struct crypto_instance *inst) +{ + return crypto_init_spawn2(&spawn->base, &alg->base, inst, + &crypto_ahash_type); +} +EXPORT_SYMBOL_GPL(crypto_init_ahash_spawn); + +struct hash_alg_common *ahash_attr_alg(struct rtattr *rta, u32 type, u32 mask) +{ + struct crypto_alg *alg; + + alg = crypto_attr_alg2(rta, &crypto_ahash_type, type, mask); + return IS_ERR(alg) ? ERR_CAST(alg) : __crypto_hash_alg_common(alg); +} +EXPORT_SYMBOL_GPL(ahash_attr_alg); + MODULE_LICENSE("GPL"); MODULE_DESCRIPTION("Asynchronous cryptographic hash type"); |