From 6ec136208cdbd2d1abe4342a844e574dc426a03a Mon Sep 17 00:00:00 2001
From: JacobBarthelmeh <jacob@wolfssl.com>
Date: Fri, 31 Jan 2020 14:26:04 -0800
Subject: [PATCH] add sha256 hardware acceleration

---
 wolfcrypt/src/sha256.c | 36 ++++++++++++++++++++++++++++++++++++
 1 file changed, 36 insertions(+)

diff --git a/wolfcrypt/src/sha256.c b/wolfcrypt/src/sha256.c
index de49e3283..31a56ed36 100644
--- a/wolfcrypt/src/sha256.c
+++ b/wolfcrypt/src/sha256.c
@@ -544,6 +544,42 @@ static int InitSha256(wc_Sha256* sha256)
 #elif defined(WOLFSSL_DEVCRYPTO_HASH)
     /* implemented in wolfcrypt/src/port/devcrypto/devcrypt_hash.c */
 
+#elif defined(WOLFSSL_SCE) && !defined(WOLFSSL_SCE_NO_HASH)
+    #include "hal_data.h"
+
+    #ifndef WOLFSSL_SCE_SHA256_HANDLE
+        #define WOLFSSL_SCE_SHA256_HANDLE g_sce_hash_0
+    #endif
+
+    #define XTRANSFORM(S, D) wc_Sha256SCE_XTRANSFORM((S), (D))
+    static int wc_Sha256SCE_XTRANSFORM(wc_Sha256* sha256, const byte* data)
+    {
+        if (WOLFSSL_SCE_SHA256_HANDLE.p_api->hashUpdate(WOLFSSL_SCE_SHA256_HANDLE.p_ctrl,
+                                                        (word32*)data, 8, sha256->digest) != SSP_SUCCESS) {
+            WOLFSSL_MSG("Unexpected hardware return value");
+            return WC_HW_E;
+        }
+        return 0;
+    }
+
+
+    int wc_InitSha256_ex(wc_Sha256* sha256, void* heap, int devId)
+    {
+        int ret = 0;
+        if (sha256 == NULL)
+            return BAD_FUNC_ARG;
+
+        sha256->heap = heap;
+
+        ret = InitSha256(sha256);
+        if (ret != 0)
+            return ret;
+
+        (void)devId;
+
+        return ret;
+    }
+
 #elif defined(WOLFSSL_ESP32WROOM32_CRYPT) && \
     !defined(NO_WOLFSSL_ESP32WROOM32_CRYPT_HASH)