https://devzone.nordicsemi.com/f/nordic-q-a/27176/crys_ecdsa_verify-returns-0x00f00871-sdk14I am trying to use the cryptocell in the bootloader (bootloader_secure_ble) for verifying dfu packages, but fails in signature verification for the same dfu package, same public key as I used with micro-ecc crypto library, where it works as it shoulden-USTelligent Community 13Thu, 23 Nov 2017 13:21:41 GMThttps://devzone.nordicsemi.com/thread/107054?ContentTypeID=1Thu, 23 Nov 2017 13:21:41 GMT137ad170-7792-4731-bb38-c0d22fbe4515:12f4870a-b056-457a-bc03-1494d751d808bjorn-spockeli<p>Hi Ola,</p> <p>the error code <code>0x000F00781</code> corresponds to <a href="http://infocenter.nordicsemi.com/topic/com.nordic.infocenter.sdk5.v14.2.0/group__crys__ecpki__error.html?resultof=%22%43%52%59%53%5f%45%43%44%53%41%5f%56%45%52%49%46%59%5f%49%4e%56%41%4c%49%44%5f%55%53%45%52%5f%43%4f%4e%54%45%58%54%5f%50%54%52%5f%45%52%52%4f%52%22%20">CRYS_ECDSA_VERIFY_INVALID_USER_CONTEXT_PTR_ERROR</a>. Hence its the</p> <pre><code>CRYS_ECDSA_VerifyUserContext_t * p_verify_context_user = NULL; </code></pre> <p>line in <code>nrf_crypto_ecdsa_verify_hash()</code> that is the cause of the error. I discussed this with one of the SW developers responsible for the Cryptocell libraries and its been declared as a null pointer intentionally. This pointer should have been passed as an argument to the nrf_crypto_ecdsa_verify_hash() function, containing the results from the previously called nrf_crypto_hash_compute() function. However, there was not enough time to implement this prior to the release of the SDK.</p> <p>Furthermore, the CC310_keil_0.9.0.lib much larger than we would like, so we&#39;re in the process looking into how we can reduce the code size and we&#39;re also re-writting the nrf_crypto library.</p> <p>Thus, I would not spend to much time on this as it will most likely change significantly once the CryptoCell library and the nrf_crypto libraries are production-ready.</p> <p>Best regards Bjørn</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/107053?ContentTypeID=1Mon, 06 Nov 2017 08:01:25 GMT137ad170-7792-4731-bb38-c0d22fbe4515:80fb34e8-3664-4d4e-b342-7139837078edOla<p>No, I have not yet found a solution - I am waiting for your response. So what do I need to do with the parameters (public key, and signature) before the call to CRYS_ECDSA_Verify(...), and how do I do what I need to do.</p> <p>/Ola.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/107052?ContentTypeID=1Sat, 04 Nov 2017 00:59:48 GMT137ad170-7792-4731-bb38-c0d22fbe4515:285be894-4ef8-4227-9492-f7c0e17b9f73bjorn-spockeli<p>I apologize for the late reply. Are you still having this issue or have you found a solution?</p><div style="clear:both;"></div>