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>
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 @@
}
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");