crypto: arm64/aes-neonbs - switch to library version of key expansion routine

Switch to the new AES library that also provides an implementation of
the AES key expansion routine. This removes the dependency on the
generic AES cipher, allowing it to be omitted entirely in the future.
Signed-off-by: NArd Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: NHerbert Xu <herbert@gondor.apana.org.au>

arch/arm64/crypto/Kconfig

@@ -116,6 +116,7 @@ config CRYPTO_AES_ARM64_BS
 	select CRYPTO_BLKCIPHER
 	select CRYPTO_AES_ARM64_NEON_BLK
 	select CRYPTO_AES_ARM64
+	select CRYPTO_LIB_AES
 	select CRYPTO_SIMD
 
 endif

arch/arm64/crypto/aes-neonbs-glue.c

@@ -74,7 +74,7 @@ static int aesbs_setkey(struct crypto_skcipher *tfm, const u8 *in_key,
 	struct crypto_aes_ctx rk;
 	int err;
 
-	err = crypto_aes_expand_key(&rk, in_key, key_len);
+	err = aes_expandkey(&rk, in_key, key_len);
 	if (err)
 		return err;
 
@@ -133,7 +133,7 @@ static int aesbs_cbc_setkey(struct crypto_skcipher *tfm, const u8 *in_key,
 	struct crypto_aes_ctx rk;
 	int err;
 
-	err = crypto_aes_expand_key(&rk, in_key, key_len);
+	err = aes_expandkey(&rk, in_key, key_len);
 	if (err)
 		return err;
 
@@ -205,7 +205,7 @@ static int aesbs_ctr_setkey_sync(struct crypto_skcipher *tfm, const u8 *in_key,
 	struct aesbs_ctr_ctx *ctx = crypto_skcipher_ctx(tfm);
 	int err;
 
-	err = crypto_aes_expand_key(&ctx->fallback, in_key, key_len);
+	err = aes_expandkey(&ctx->fallback, in_key, key_len);
 	if (err)
 		return err;
 
@@ -271,7 +271,7 @@ static int aesbs_xts_setkey(struct crypto_skcipher *tfm, const u8 *in_key,
 		return err;
 
 	key_len /= 2;
-	err = crypto_aes_expand_key(&rk, in_key + key_len, key_len);
+	err = aes_expandkey(&rk, in_key + key_len, key_len);
 	if (err)
 		return err;