Patch "crypto: hash - introduce crypto_hash_alg_has_setkey()" has been added to the 4.9-stable tree

[<gregkh@linuxfoundation.org>]

This is a note to let you know that I've just added the patch titled

    crypto: hash - introduce crypto_hash_alg_has_setkey()

to the 4.9-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     crypto-hash-introduce-crypto_hash_alg_has_setkey.patch
and it can be found in the queue-4.9 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


>From cd6ed77ad5d223dc6299fb58f62e0f5267f7e2ba Mon Sep 17 00:00:00 2001
From: Eric Biggers <ebiggers@google.com>
Date: Wed, 3 Jan 2018 11:16:22 -0800
Subject: crypto: hash - introduce crypto_hash_alg_has_setkey()

From: Eric Biggers <ebiggers@google.com>

commit cd6ed77ad5d223dc6299fb58f62e0f5267f7e2ba upstream.

Templates that use an shash spawn can use crypto_shash_alg_has_setkey()
to determine whether the underlying algorithm requires a key or not.
But there was no corresponding function for ahash spawns.  Add it.

Note that the new function actually has to support both shash and ahash
algorithms, since the ahash API can be used with either.

Signed-off-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 crypto/ahash.c                 |   11 +++++++++++
 include/crypto/internal/hash.h |    2 ++
 2 files changed, 13 insertions(+)

--- a/crypto/ahash.c
+++ b/crypto/ahash.c
@@ -625,5 +625,16 @@ struct hash_alg_common *ahash_attr_alg(s
 }
 EXPORT_SYMBOL_GPL(ahash_attr_alg);
 
+bool crypto_hash_alg_has_setkey(struct hash_alg_common *halg)
+{
+	struct crypto_alg *alg = &halg->base;
+
+	if (alg->cra_type != &crypto_ahash_type)
+		return crypto_shash_alg_has_setkey(__crypto_shash_alg(alg));
+
+	return __crypto_ahash_alg(alg)->setkey != NULL;
+}
+EXPORT_SYMBOL_GPL(crypto_hash_alg_has_setkey);
+
 MODULE_LICENSE("GPL");
 MODULE_DESCRIPTION("Asynchronous cryptographic hash type");
--- a/include/crypto/internal/hash.h
+++ b/include/crypto/internal/hash.h
@@ -88,6 +88,8 @@ static inline bool crypto_shash_alg_has_
 	return alg->setkey != shash_no_setkey;
 }
 
+bool crypto_hash_alg_has_setkey(struct hash_alg_common *halg);
+
 int crypto_init_ahash_spawn(struct crypto_ahash_spawn *spawn,
 			    struct hash_alg_common *alg,
 			    struct crypto_instance *inst);


Patches currently in stable-queue which might be from ebiggers@google.com are

queue-4.9/crypto-cryptd-pass-through-absence-of-setkey.patch
queue-4.9/crypto-hash-prevent-using-keyed-hashes-without-setting-key.patch
queue-4.9/nfs-reject-request-for-id_legacy-key-without-auxdata.patch
queue-4.9/crypto-poly1305-remove-setkey-method.patch
queue-4.9/crypto-hash-introduce-crypto_hash_alg_has_setkey.patch
queue-4.9/crypto-mcryptd-pass-through-absence-of-setkey.patch