hash: Allow for SHA512 hardware implementations

Similar to support for SHA1 and SHA256, allow the use of hardware hashing
engine by enabling the algorithm and setting  CONFIG_SHA_HW_ACCEL /
CONFIG_SHA_PROG_HW_ACCEL.

Signed-off-by: Joel Stanley <joel@jms.id.au>

common/hash.c

@@ -97,7 +97,7 @@ static int hash_finish_sha256(struct hash_algo *algo, void *ctx, void
 }
 #endif
 
-#if defined(CONFIG_SHA384)
+#if defined(CONFIG_SHA384) && !defined(CONFIG_SHA_PROG_HW_ACCEL)
 static int hash_init_sha384(struct hash_algo *algo, void **ctxp)
 {
 	sha512_context *ctx = malloc(sizeof(sha512_context));
@@ -125,7 +125,7 @@ static int hash_finish_sha384(struct hash_algo *algo, void *ctx, void
 }
 #endif
 
-#if defined(CONFIG_SHA512)
+#if defined(CONFIG_SHA512) && !defined(CONFIG_SHA_PROG_HW_ACCEL)
 static int hash_init_sha512(struct hash_algo *algo, void **ctxp)
 {
 	sha512_context *ctx = malloc(sizeof(sha512_context));
@@ -260,10 +260,20 @@ static struct hash_algo hash_algo[] = {
 		.name		= "sha384",
 		.digest_size	= SHA384_SUM_LEN,
 		.chunk_size	= CHUNKSZ_SHA384,
+#ifdef CONFIG_SHA_HW_ACCEL
+		.hash_func_ws	= hw_sha384,
+#else
 		.hash_func_ws	= sha384_csum_wd,
+#endif
+#ifdef CONFIG_SHA_PROG_HW_ACCEL
+		.hash_init	= hw_sha_init,
+		.hash_update	= hw_sha_update,
+		.hash_finish	= hw_sha_finish,
+#else
 		.hash_init	= hash_init_sha384,
 		.hash_update	= hash_update_sha384,
 		.hash_finish	= hash_finish_sha384,
+#endif
 	},
 #endif
 #ifdef CONFIG_SHA512
@@ -271,10 +281,20 @@ static struct hash_algo hash_algo[] = {
 		.name		= "sha512",
 		.digest_size	= SHA512_SUM_LEN,
 		.chunk_size	= CHUNKSZ_SHA512,
+#ifdef CONFIG_SHA_HW_ACCEL
+		.hash_func_ws	= hw_sha512,
+#else
 		.hash_func_ws	= sha512_csum_wd,
+#endif
+#ifdef CONFIG_SHA_PROG_HW_ACCEL
+		.hash_init	= hw_sha_init,
+		.hash_update	= hw_sha_update,
+		.hash_finish	= hw_sha_finish,
+#else
 		.hash_init	= hash_init_sha512,
 		.hash_update	= hash_update_sha512,
 		.hash_finish	= hash_finish_sha512,
+#endif
 	},
 #endif
 	{

include/hw_sha.h

@@ -8,6 +8,32 @@
 #define __HW_SHA_H
 #include <hash.h>
 
+/**
+ * Computes hash value of input pbuf using h/w acceleration
+ *
+ * @param in_addr	A pointer to the input buffer
+ * @param bufleni	Byte length of input buffer
+ * @param out_addr	A pointer to the output buffer. When complete
+ *			64 bytes are copied to pout[0]...pout[63]. Thus, a user
+ *			should allocate at least 64 bytes at pOut in advance.
+ * @param chunk_size	chunk size for sha512
+ */
+void hw_sha512(const uchar *in_addr, uint buflen, uchar *out_addr,
+	       uint chunk_size);
+
+/**
+ * Computes hash value of input pbuf using h/w acceleration
+ *
+ * @param in_addr	A pointer to the input buffer
+ * @param bufleni	Byte length of input buffer
+ * @param out_addr	A pointer to the output buffer. When complete
+ *			48 bytes are copied to pout[0]...pout[47]. Thus, a user
+ *			should allocate at least 48 bytes at pOut in advance.
+ * @param chunk_size	chunk size for sha384
+ */
+void hw_sha384(const uchar *in_addr, uint buflen, uchar *out_addr,
+	       uint chunk_size);
+
 /**
  * Computes hash value of input pbuf using h/w acceleration
  *

lib/Kconfig

@@ -391,19 +391,18 @@ config SHA384
 config SHA_HW_ACCEL
 	bool "Enable hashing using hardware"
 	help
-	  This option enables hardware acceleration
+	  This option enables hardware acceleration for SHA hashing.
-	  for SHA1/SHA256 hashing.
+	  This affects the 'hash' command and also the hash_lookup_algo()
-	  This affects the 'hash' command and also the
+	  function.
-	  hash_lookup_algo() function.
 
 config SHA_PROG_HW_ACCEL
 	bool "Enable Progressive hashing support using hardware"
 	depends on SHA_HW_ACCEL
 	help
-	  This option enables hardware-acceleration for
+	  This option enables hardware-acceleration for SHA progressive
-	  SHA1/SHA256 progressive hashing.
+	  hashing.
-	  Data can be streamed in a block at a time and the hashing
+	  Data can be streamed in a block at a time and the hashing is
-	  is performed in hardware.
+	  performed in hardware.
 
 config MD5
 	bool "Support MD5 algorithm"