https – How to create self signed SSL certificate for test purposes? – Stack Overflow
You can do this via openssl:
- Install openssl package (if you are using Windows, download binaries here).
- Generate private key:
openssl genrsa 2048 > private.pem - Generate the self signed certificate:
openssl req -x509 -days 1000 -new -key private.pem -out public.pem - If needed, create PFX:
openssl pkcs12 -export -in public.pem -inkey private.pem -out mycert.pfx
OpenSSL
Binary
https://wiki.openssl.org/index.php/Binaries
OpenSSL for Windows
Pre-compiled 64-bit (x64) and 32-bit (x86) 1.1.1 and 3.0 executables and libraries for Microsoft Windows Operating Systems with a dependency on the Microsoft Visual Studio 2015-2019 runtime and Microsoft Visual Studio 2015-2022 runtime respectively.
The distribution may be used standalone or integrated into any Windows application. The distribution’s EXE and DLL files are digitally signed ‘FireDaemon Technologies Limited’.
https://kb.firedaemon.com/support/solutions/articles/4000121705
1 Download ZIP File (Preferred)
3 Installation
Set config in cmd for session
set OPENSSL_CONF=C:\testca\openssl.cnf
echo %OPENSSL_CONF%
Working example
Manually Generating a CA, Certificates and Private Keys
Generate the key and certificates that our test Certificate Authority will use.
The process for creating server and client certificates is very similar.
Working example
quickguides/info.info at main · spawnmarvel/quickguides (github.com)
Encrypt with key and decrypt with key (fun)
Best Online Encrypt Decrypt Tool (codebeautify.org)