[CRYPTO] aes: Export generic setkey

The key expansion routine could be get little more generic, become
a kernel doc entry and then get exported.

Signed-off-by: Sebastian Siewior <sebastian@breakpoint.cc>
Tested-by: Stefan Hellermann <stefan@the2masters.de>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

1 files changed, 6 insertions, 2 deletions

diff --git a/include/crypto/aes.h b/include/crypto/aes.h
index d480b76715a8..40008d67ee3d 100644
--- a/include/crypto/aes.h
+++ b/include/crypto/aes.h
@@ -14,11 +14,13 @@
 #define AES_KEYSIZE_192         24
 #define AES_KEYSIZE_256         32
 #define AES_BLOCK_SIZE          16
+#define AES_MAX_KEYLENGTH       (15 * 16)
+#define AES_MAX_KEYLENGTH_U32   (AES_MAX_KEYLENGTH / sizeof(u32))
 
 struct crypto_aes_ctx {
         u32 key_length;
-        u32 key_enc[60];
-        u32 key_dec[60];
+        u32 key_enc[AES_MAX_KEYLENGTH_U32];
+        u32 key_dec[AES_MAX_KEYLENGTH_U32];
 };
 
 extern u32 crypto_ft_tab[4][256];
@@ -28,4 +30,6 @@ extern u32 crypto_il_tab[4][256];
 
 int crypto_aes_set_key(struct crypto_tfm *tfm, const u8 *in_key,
                 unsigned int key_len);
+int crypto_aes_expand_key(struct crypto_aes_ctx *ctx, const u8 *in_key,
+                unsigned int key_len);
 #endif