How to convert crt file to c header file?

[Ronensol]

Hello, 

in DevAcademi - lessone 4 excercise 2, need to convert crt file to c header file, once running the command "python crt_to_header.py" 

i'm getting error "FileNotFoundError: [Errno 2] No such file or directory: 'server_certificate.crt'"

what can cause it? how can i solve it?

example for the output:

C:\Users\Ronen\source\repos\Cellular-IoT-Fundamentals\lesson4\cellfund_less4_exer2\script>python crt_to_header.py
Traceback (most recent call last):
File "C:\Users\Ronen\source\repos\Cellular-IoT-Fundamentals\lesson4\cellfund_less4_exer2\script\crt_to_header.py", line 5, in <module>
key = open('server_certificate.crt').read()
FileNotFoundError: [Errno 2] No such file or directory: 'server_certificate.crt'

Thanks, 

Ronen

[Ali Aljaani]

Hi ,

You need to download the the certificate from here https://test.mosquitto.org/ 

Store it in the in the exercise root directory of the application, and make sure to name it: server_certificate.crt . 

The Python script expects this file to be placed and named as such.

This is explaied in step 3 of the exercise. https://academy.nordicsemi.com/topic/lesson-4-exercise-2/ 

If you have any doubt, the solution is also avaiable in the repo of the course https://github.com/NordicDeveloperAcademy/Cellular-IoT-Fundamentals/tree/master/lesson4/cellfund_less4_exer2_solution . 

[Ronensol]

i followed the instructions but for some reason the python script can't open .crt file for read, 

so i took it from repo of the course.

Thank you