From 8bc521f3e5e83fddc08a031aa7cf7499514ee732 Mon Sep 17 00:00:00 2001
From: Pali Rohár <pali.rohar@gmail.com>
Date: Sat, 23 Jun 2012 13:07:34 +0200
Subject: do_hash_file - align size for mmc images, append chars \xff (nokia
 flasher needs mmc images alingned)

---
 src/flash.c |  2 +-
 src/hash.c  | 16 +++++++++++++++-
 src/hash.h  |  2 +-
 src/main.c  |  2 +-
 4 files changed, 18 insertions(+), 4 deletions(-)

diff --git a/src/flash.c b/src/flash.c
index d1d7efd..3ad957f 100644
--- a/src/flash.c
+++ b/src/flash.c
@@ -84,7 +84,7 @@ void flash_image(const char *filename, const char *piece, const char *device, co
 	unsigned long long size, off;
 	unsigned char bsize[4], tmp;
 	unsigned char nolofiller[128];
-	ushort hash = do_hash_file(filename);
+	ushort hash = do_hash_file(filename, piece);
 
 	if (piece == NULL) {
 		//exit(1);
diff --git a/src/hash.c b/src/hash.c
index db79a06..4ee070c 100644
--- a/src/hash.c
+++ b/src/hash.c
@@ -17,6 +17,7 @@
  */
 
 #include <stdio.h>
+#include <string.h>
 #include "hash.h"
 
 usho do_hash(usho *b, int len)
@@ -27,11 +28,12 @@ usho do_hash(usho *b, int len)
 	return result;
 }
 
-usho do_hash_file(const char *filename)
+usho do_hash_file(const char *filename, const char *type)
 {
 	unsigned char buf[BSIZE];
 	FILE *fd = fopen(filename, "r");
 	usho hash = 0;
+	int size;
 	int ret;
 
 	if (fd == NULL) {
@@ -46,8 +48,20 @@ usho do_hash_file(const char *filename)
 		hash ^= do_hash((usho *)&buf, ret);
 	} while(ret);
 
+	size = ftell(fd);
 	fclose(fd);
 
+	/* mmc image must be aligned */
+	if (type && strcmp(type, "mmc") == 0) {
+		int align = ((size >> 8) + 1) << 8;
+		printf("align from %d to %d\n", size, align);
+		buf[0] = 0xff;
+		while (size < align) {
+			hash ^= do_hash((usho *)&buf, 1);
+			++size;
+		}
+	}
+
 	return hash;
 }
 
diff --git a/src/hash.h b/src/hash.h
index 363d5d4..03825ae 100644
--- a/src/hash.h
+++ b/src/hash.h
@@ -5,6 +5,6 @@
 #define BSIZE 0x20000
 
 usho do_hash(usho *b, int len);
-usho do_hash_file(const char *filename);
+usho do_hash_file(const char *filename, const char *type);
 
 #endif
diff --git a/src/main.c b/src/main.c
index 6f37334..68f7ffb 100644
--- a/src/main.c
+++ b/src/main.c
@@ -291,7 +291,7 @@ int main(int argc, char **argv)
 	while((c = getopt(argc, argv, "QC:cp:PvVhRu:ib:U:r:e:ld:I:D:f:F:s:xH:S:n")) != -1) {
 		switch(c) {
 		case 'H':
-			printf("xorpair: %04x\n", do_hash_file(optarg));
+			printf("xorpair: %04x\n", do_hash_file(optarg, NULL));
 			return 0;
 		case 'x':
 			return dump_config();
-- 
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