wolfBoot/tools/scripts/prepare_encrypted_update.sh

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#!/bin/bash
# SIZE is WOLFBOOT_PARTITION_SIZE - 49 (44B: key + nonce, 5B: "pBOOT")
SIZE=131023
VERSION=8
APP=test-app/image_v"$VERSION"_signed_and_encrypted.bin
# Create test key
echo -n "0123456789abcdef0123456789abcdef0123456789ab" > enc_key.der
./tools/keytools/sign.py --encrypt enc_key.der test-app/image.bin ecc256.der $VERSION
dd if=/dev/zero bs=$SIZE count=1 2>/dev/null | tr "\000" "\377" > update.bin
dd if=$APP of=update.bin bs=1 conv=notrunc
printf "pBOOT" >> update.bin