Hi,

We have developed a propriety protocol that authenticate node using certificate. In our PKI, we have four level of certificates as ROOT_CA, PROXY_CA, LOCAL_CA, and DEVICE_CERTIFICATE. Parsing of trusted CA certificate is getting success. However, verifying PROXY_CA against ROOT_CA fails with below error code.

MBEDTLS_ERR_X509_UNKNOWN_SIG_ALG + MBEDTLS_ERR_OID_NOT_FOUND

I have viewed the certificates transacted using OpenSSL command, the ASN1 OID is ECDSA_SHA384. Though, I have enabled the algorithm, it is failing. Any support would be appreciated. Attached the config.h for your reference.

Thanks,

Gopi Krishnan