crypto: aead - Add type-safe init/exit functions

As it stands the only non-type safe functions left in the new
AEAD interface are the cra_init/cra_exit functions.  It means
exposing the ugly __crypto_aead_cast to every AEAD implementor.

This patch adds type-safe init/exit functions to AEAD.  Existing
algorithms are unaffected while new implementations can simply
fill in these two instead of cra_init/cra_exit.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

1 files changed, 14 insertions, 0 deletions

diff --git a/crypto/aead.c b/crypto/aead.c
index 8cdea89..4bab3cf 100644
--- a/crypto/aead.c
+++ b/crypto/aead.c
@@ -174,6 +174,14 @@ static int crypto_old_aead_init_tfm(struct crypto_tfm *tfm)
 	return 0;
 }
 
+static void crypto_aead_exit_tfm(struct crypto_tfm *tfm)
+{
+	struct crypto_aead *aead = __crypto_aead_cast(tfm);
+	struct aead_alg *alg = crypto_aead_alg(aead);
+
+	alg->exit(aead);
+}
+
 static int crypto_aead_init_tfm(struct crypto_tfm *tfm)
 {
 	struct crypto_aead *aead = __crypto_aead_cast(tfm);
@@ -189,6 +197,12 @@ static int crypto_aead_init_tfm(struct crypto_tfm *tfm)
 	aead->child = __crypto_aead_cast(tfm);
 	aead->authsize = alg->maxauthsize;
 
+	if (alg->exit)
+		aead->base.exit = crypto_aead_exit_tfm;
+
+	if (alg->init)
+		return alg->init(aead);
+
 	return 0;
 }