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crypto: echainiv - Only hold RNG during initialisation 

This patch changes the RNG allocation so that we only hold a
reference to the RNG during initialisation.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Herbert Xu 2015-06-21 19:11:50 +08:00
parent eeee12aa34
commit 9fcc704dfd
1 changed files with 6 additions and 22 deletions
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28
crypto/echainiv.c
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@ -197,8 +197,13 @@ static int echainiv_init(struct crypto_tfm *tfm)
crypto_aead_set_reqsize(geniv, sizeof(struct aead_request));
err = crypto_get_default_rng();
if (err)
goto out;
err = crypto_rng_get_bytes(crypto_default_rng, ctx->salt,
crypto_aead_ivsize(geniv));
crypto_put_default_rng();
if (err)
goto out;
@ -277,35 +282,14 @@ static int echainiv_aead_create(struct crypto_template *tmpl,
goto out;
}
static int echainiv_create(struct crypto_template *tmpl, struct rtattr **tb)
{
int err;
err = crypto_get_default_rng();
if (err)
goto out;
err = echainiv_aead_create(tmpl, tb);
if (err)
goto put_rng;
out:
return err;
put_rng:
crypto_put_default_rng();
goto out;
}
static void echainiv_free(struct crypto_instance *inst)
{
aead_geniv_free(aead_instance(inst));
crypto_put_default_rng();
}
static struct crypto_template echainiv_tmpl = {
.name = "echainiv",
.create = echainiv_create,
.create = echainiv_aead_create,
.free = echainiv_free,
.module = THIS_MODULE,
};