https://devzone.nordicsemi.com/f/nordic-q-a/72484/how-to-crosscheck-if-the-firmware-hash-generated-by-hash-functionHello Everyone, I am generating firmware hash using an hash function provided by an external library and using CODE_START and CODE_SIZE macros in app_util.h , So i wanted to crosscheck if the hash generated is correct or not, Is there any external siteen-USTelligent Community 13Mon, 08 Mar 2021 21:56:58 GMThttps://devzone.nordicsemi.com/thread/298522?ContentTypeID=1Mon, 08 Mar 2021 21:56:58 GMT137ad170-7792-4731-bb38-c0d22fbe4515:db2441d0-fbf8-459f-ac48-55c409cea54dJ&#248;rgen Holmefjord<p>Hi,</p> <p>If&nbsp;you convert the application to a .bin file, you should be able to use any SHA256 Hash calculator for this task.</p> <p>You can convert using following command (given that application.hex is present in C:\FW\ directory):</p> <p><pre class="ui-code" data-mode="text">arm-none-eabi-objcopy -I ihex C:\FW\application.hex -O binary C:\FW\application.bin</pre></p> <p>I verified that the following <a href="https://emn178.github.io/online-tools/sha256_checksum.html">online tool calculates</a> the same hash as Notepad++ (Tools &gt; SHA-256 &gt; Generate from files):</p> <p><img alt=" " src="https://devzone.nordicsemi.com/resized-image/__size/320x240/__key/communityserver-discussions-components-files/4/sha256_5F00_online.png" /></p> <p><img alt=" " src="https://devzone.nordicsemi.com/resized-image/__size/320x240/__key/communityserver-discussions-components-files/4/sha256_5F00_notepadpp.png" /></p> <p>I verified that nrf_crypto_hash produce the same hash:</p> <p><img alt=" " src="https://devzone.nordicsemi.com/resized-image/__size/320x240/__key/communityserver-discussions-components-files/4/sha256_5F00_nrfcrypto.png" /></p> <p>I will post the code I used for calculation in the <a href="https://devzone.nordicsemi.com/f/nordic-q-a/72193/how-to-generate-firmware-s-hash">other thread</a>.</p> <p>Best regards,<br />Jørgen</p><div style="clear:both;"></div>