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Subject[PATCH 3.2 043/153] crypto: cryptd - pass through absence of ->setkey()
3.2.102-rc1 review patch.  If anyone has any objections, please let me know.

------------------

From: Eric Biggers <ebiggers@google.com>

commit 841a3ff329713f796a63356fef6e2f72e4a3f6a3 upstream.

When the cryptd template is used to wrap an unkeyed hash algorithm,
don't install a ->setkey() method to the cryptd instance. This change
is necessary for cryptd to keep working with unkeyed hash algorithms
once we start enforcing that ->setkey() is called when present.

Signed-off-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
---
crypto/cryptd.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)

--- a/crypto/cryptd.c
+++ b/crypto/cryptd.c
@@ -617,7 +617,8 @@ static int cryptd_create_hash(struct cry
inst->alg.finup = cryptd_hash_finup_enqueue;
inst->alg.export = cryptd_hash_export;
inst->alg.import = cryptd_hash_import;
- inst->alg.setkey = cryptd_hash_setkey;
+ if (crypto_shash_alg_has_setkey(salg))
+ inst->alg.setkey = cryptd_hash_setkey;
inst->alg.digest = cryptd_hash_digest_enqueue;

err = ahash_register_instance(tmpl, inst);
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