Tasmota/tasmota/include/local_ca_data_sample.h

/*
  local_ca_sample.h - sample file for embedding a local CA certificate

  Copyright (C) 2021  Theo Arends

  This program is free software: you can redistribute it and/or modify
  it under the terms of the GNU General Public License as published by
  the Free Software Foundation, either version 3 of the License, or
  (at your option) any later version.

  This program is distributed in the hope that it will be useful,
  but WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  GNU General Public License for more details.

  You should have received a copy of the GNU General Public License
  along with this program.  If not, see <http://www.gnu.org/licenses/>.
*/

/*
To generate a version of this file containing data for your root certificate, 
run the following command from a Linux or Cygwin bash shell, assuming that a 
copy of brssl (or brssl.exe) is in the directory where the EasyRSA shell script
is located. 

./brssl ta pki/ca.crt | sed -e '/br_x509/,+999 d' >local_ca_data.h

Then copy local_ca_data.h into directory include.

Add this line to user_config_override.h:

#define INCLUDE_LOCAL_CERT

Be sure to generate both files: local_ca_data.h, and local_ca_descriptor.h
*/

//
// this is what the result will look like, except there will be
// a lot of data bytes defined in the first three arrays 
//
static const unsigned char PROGMEM TA0_DN[] = {
	// variable number of bytes go here (typically 100-140 or so) for the DN
};

static const unsigned char PROGMEM TA0_RSA_N[] = {
	// 256 bytes go here for the public key modulus
};

static const unsigned char PROGMEM TA0_RSA_E[] = {
	// 3 bytes go here for the public key exponent
};