Support mbedtls 3.0.0

[Coder666]

I've successfully compiled this library against mbedtls 3.0.0 however a couple of very minor changes are required:

certs.h does not exist in 3.0.0

Config.hpp
...
...
#ifndef oatpp_mbedtls_Config_hpp
#define oatpp_mbedtls_Config_hpp

#include "mbedtls/entropy.h"
#include "mbedtls/ctr_drbg.h"
#if MBEDTLS_VERSION_MAJOR < 3
#include "mbedtls/certs.h"
#endif
#include "mbedtls/x509.h"
#include "mbedtls/ssl.h"
...
...

mbedtls_pk_parse_keyfile requires a rng

Config.cpp

...
...
...
std::shared_ptr<Config> Config::createDefaultServerConfigShared(const char* serverCertFile, const char* privateKeyFile, const char* pkPassword) {

  auto result = createShared();

#if defined(OATPP_MBEDTLS_DEBUG)
  mbedtls_ssl_conf_dbg( &result->m_config, mbedtlsDebug, (void*)"Server" );
  mbedtls_debug_set_threshold( OATPP_MBEDTLS_DEBUG );
#endif

  auto res = mbedtls_x509_crt_parse_file(&result->m_srvcert, serverCertFile);
  if(res != 0) {
    OATPP_LOGD("[oatpp::mbedtls::Config::createDefaultServerConfigShared()]", "Error. Can't parse serverCertFile path='%s', return value=%d", serverCertFile, res);
    throw std::runtime_error("[oatpp::mbedtls::Config::createDefaultServerConfigShared()]: Error. Can't parse serverCertFile");
  }

#if MBEDTLS_VERSION_MAJOR >= 3
  res = mbedtls_pk_parse_keyfile(&result->m_privateKey, privateKeyFile, pkPassword, mbedtls_ctr_drbg_random, &result->m_ctr_drbg);
#else
  res = mbedtls_pk_parse_keyfile(&result->m_privateKey, privateKeyFile, pkPassword);
#endif
  if(res != 0)
...
...
...

NOTE: I haven't yet tested this, only got the build working.

Is support for mbedtls 3.0.0 something that could be added into the library?

[bamkrs]

Hey @Coder666 !
Extending the support to a broader range of supported versions is always good! We would be grateful if you could contribute a PR when your changes have proven themselves to be functional. 🥳

[dg0yt]

Three years later, this is the last blocker for updating mbedtls in vcpkg.
With no updates in two years, it is probably okay to simply skip oatmpp-mbedtls in vcpkg CI.