X-Git-Url: https://git.karo-electronics.de/?a=blobdiff_plain;f=lib%2Fsha256.c;h=bb338baefa836a6a73d5872c9f7412536b0a25f2;hb=336b5785adad8a7d372a8bf6e58dee9b6dbd808a;hp=deb63a40b6d7218145e807850ff51cce488a7e4b;hpb=78acc472d9719316f22e002a009a998d9ceec29d;p=karo-tx-uboot.git

diff --git a/lib/sha256.c b/lib/sha256.c
index deb63a40b6..bb338baefa 100644
--- a/lib/sha256.c
+++ b/lib/sha256.c
@@ -3,27 +3,17 @@
  *
  * Copyright (C) 2001-2003  Christophe Devine
  *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ * SPDX-License-Identifier:	GPL-2.0+
  */
 
 #ifndef USE_HOSTCC
 #include <common.h>
+#include <linux/string.h>
+#else
+#include <string.h>
 #endif /* USE_HOSTCC */
 #include <watchdog.h>
-#include <linux/string.h>
-#include <sha256.h>
+#include <u-boot/sha256.h>
 
 /*
  * 32-bit integer manipulation macros (big endian)
@@ -60,7 +50,7 @@ void sha256_starts(sha256_context * ctx)
 	ctx->state[7] = 0x5BE0CD19;
 }
 
-void sha256_process(sha256_context * ctx, uint8_t data[64])
+static void sha256_process(sha256_context *ctx, const uint8_t data[64])
 {
 	uint32_t temp1, temp2;
 	uint32_t W[64];
@@ -191,7 +181,7 @@ void sha256_process(sha256_context * ctx, uint8_t data[64])
 	ctx->state[7] += H;
 }
 
-void sha256_update(sha256_context * ctx, uint8_t * input, uint32_t length)
+void sha256_update(sha256_context *ctx, const uint8_t *input, uint32_t length)
 {
 	uint32_t left, fill;
 
@@ -260,3 +250,37 @@ void sha256_finish(sha256_context * ctx, uint8_t digest[32])
 	PUT_UINT32_BE(ctx->state[6], digest, 24);
 	PUT_UINT32_BE(ctx->state[7], digest, 28);
 }
+
+/*
+ * Output = SHA-256( input buffer ). Trigger the watchdog every 'chunk_sz'
+ * bytes of input processed.
+ */
+void sha256_csum_wd(const unsigned char *input, unsigned int ilen,
+		unsigned char *output, unsigned int chunk_sz)
+{
+	sha256_context ctx;
+#if defined(CONFIG_HW_WATCHDOG) || defined(CONFIG_WATCHDOG)
+	const unsigned char *end;
+	unsigned char *curr;
+	int chunk;
+#endif
+
+	sha256_starts(&ctx);
+
+#if defined(CONFIG_HW_WATCHDOG) || defined(CONFIG_WATCHDOG)
+	curr = (unsigned char *)input;
+	end = input + ilen;
+	while (curr < end) {
+		chunk = end - curr;
+		if (chunk > chunk_sz)
+			chunk = chunk_sz;
+		sha256_update(&ctx, curr, chunk);
+		curr += chunk;
+		WATCHDOG_RESET();
+	}
+#else
+	sha256_update(&ctx, input, ilen);
+#endif
+
+	sha256_finish(&ctx, output);
+}