tools/firmware-utils: fix buffalo csum calculation

Also print an error message if decryption fails.

SVN-Revision: 27167

tools/firmware-utils/src/buffalo-enc.c

@@ -87,8 +87,10 @@ static int decrypt_file(void)
 	ep.key = (unsigned char *) crypt_key;
 
 	err = decrypt_buf(&ep, buf, src_len);
-	if (err)
+	if (err) {
+		ERR("unable to decrypt '%s'", ifname);
 		goto out;
+	}
 
 	printf("Magic\t\t: '%s'\n", ep.magic);
 	printf("Seed\t\t: 0x%02x\n", ep.seed);

tools/firmware-utils/src/buffalo-lib.c

@@ -179,7 +179,7 @@ int bcrypt_buf(unsigned char seed, unsigned char *key, unsigned char *src,
 
 uint32_t buffalo_csum(uint32_t csum, void *buf, unsigned long len)
 {
-	unsigned char *p = buf;
+	char *p = buf;
 
 	while (len--) {
 		int i;