crypto: sha512 - Expose generic sha512 routine to be callable from other modules

Other SHA512 routines may need to use the generic routine when
FPU is not available.

Signed-off-by: Tim Chen <tim.c.chen@linux.intel.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

crypto/sha512_generic.c

@@ -163,8 +163,8 @@ sha384_init(struct shash_desc *desc)
 	return 0;
 }
 
-static int
-sha512_update(struct shash_desc *desc, const u8 *data, unsigned int len)
+int crypto_sha512_update(struct shash_desc *desc, const u8 *data,
+			unsigned int len)
 {
 	struct sha512_state *sctx = shash_desc_ctx(desc);
 
@@ -197,6 +197,7 @@ sha512_update(struct shash_desc *desc, const u8 *data, unsigned int len)
 
 	return 0;
 }
+EXPORT_SYMBOL(crypto_sha512_update);
 
 static int
 sha512_final(struct shash_desc *desc, u8 *hash)
@@ -215,10 +216,10 @@ sha512_final(struct shash_desc *desc, u8 *hash)
 	/* Pad out to 112 mod 128. */
 	index = sctx->count[0] & 0x7f;
 	pad_len = (index < 112) ? (112 - index) : ((128+112) - index);
-	sha512_update(desc, padding, pad_len);
+	crypto_sha512_update(desc, padding, pad_len);
 
 	/* Append length (before padding) */
-	sha512_update(desc, (const u8 *)bits, sizeof(bits));
+	crypto_sha512_update(desc, (const u8 *)bits, sizeof(bits));
 
 	/* Store state in digest */
 	for (i = 0; i < 8; i++)
@@ -245,7 +246,7 @@ static int sha384_final(struct shash_desc *desc, u8 *hash)
 static struct shash_alg sha512_algs[2] = { {
 	.digestsize	=	SHA512_DIGEST_SIZE,
 	.init		=	sha512_init,
-	.update		=	sha512_update,
+	.update		=	crypto_sha512_update,
 	.final		=	sha512_final,
 	.descsize	=	sizeof(struct sha512_state),
 	.base		=	{
@@ -257,7 +258,7 @@ static struct shash_alg sha512_algs[2] = { {
 }, {
 	.digestsize	=	SHA384_DIGEST_SIZE,
 	.init		=	sha384_init,
-	.update		=	sha512_update,
+	.update		=	crypto_sha512_update,
 	.final		=	sha384_final,
 	.descsize	=	sizeof(struct sha512_state),
 	.base		=	{

include/crypto/sha.h

@@ -89,4 +89,7 @@ extern int crypto_sha1_update(struct shash_desc *desc, const u8 *data,
 
 extern int crypto_sha256_update(struct shash_desc *desc, const u8 *data,
 			      unsigned int len);
+
+extern int crypto_sha512_update(struct shash_desc *desc, const u8 *data,
+			      unsigned int len);
 #endif