1 files changed, 91 insertions, 0 deletions
diff --git a/common/image.c b/common/image.c
new file mode 100644
index 0000000..7a0a3d2
--- /dev/null
+++ b/common/image.c
@@ -0,0 +1,91 @@
+/*
+ * (C) Copyright 2008 Semihalf
+ *
+ * (C) Copyright 2000-2006
+ * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * 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
+ */
+#ifndef USE_HOSTCC
+# include <common.h>
+# include <watchdog.h>
+#else
+# include "mkimage.h"
+#endif
+
+#include <image.h>
+
+unsigned long crc32 (unsigned long, const unsigned char *, unsigned int);
+
+int image_check_hcrc (image_header_t *hdr)
+{
+	ulong hcrc;
+	ulong len = image_get_header_size ();
+	image_header_t header;
+
+	/* Copy header so we can blank CRC field for re-calculation */
+	memmove (&header, (char *)hdr, image_get_header_size ());
+	image_set_hcrc (&header, 0);
+
+	hcrc = crc32 (0, (unsigned char *)&header, len);
+
+	return (hcrc == image_get_hcrc (hdr));
+}
+
+int image_check_dcrc (image_header_t *hdr)
+{
+	ulong data = image_get_data (hdr);
+	ulong len = image_get_data_size (hdr);
+	ulong dcrc = crc32 (0, (unsigned char *)data, len);
+
+	return (dcrc == image_get_dcrc (hdr));
+}
+
+int image_check_dcrc_wd (image_header_t *hdr, ulong chunksz)
+{
+	ulong dcrc = 0;
+	ulong len = image_get_data_size (hdr);
+	ulong data = image_get_data (hdr);
+
+#if defined(CONFIG_HW_WATCHDOG) || defined(CONFIG_WATCHDOG)
+	ulong cdata = data;
+	ulong edata = cdata + len;
+
+	while (cdata < edata) {
+		ulong chunk = edata - cdata;
+
+		if (chunk > chunksz)
+			chunk = chunksz;
+		dcrc = crc32 (dcrc, (unsigned char *)cdata, chunk);
+		cdata += chunk;
+
+		WATCHDOG_RESET ();
+	}
+#else
+	dcrc = crc32 (0, (unsigned char *)data, len);
+#endif
+
+	return (dcrc == image_get_dcrc (hdr));
+}
+
+int getenv_verify (void)
+{
+	char *s = getenv ("verify");
+	return (s && (*s == 'n')) ? 0 : 1;
+}