I'm working on the OpenSSL server example but I cannot understand how the keys are loaded from the external files... could you please explain me the meaning of:
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extern const unsigned char cacert_pem_start[] asm("_binary_cacert_pem_start");
extern const unsigned char cacert_pem_end[] asm("_binary_cacert_pem_end");
const unsigned int cacert_pem_bytes = cacert_pem_end - cacert_pem_start;