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This gist describes the configuration required for Spring reactive WebClient to make a call to an OAuth2 protected resource through OAuth2.0 Client Credentials Grant Type Flow.

Assumption is that the Authorization Server supports OpenId Connect 1.0 specifications.

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fntlnz / self-signed-certificate-with-custom-ca.md
Last active April 23, 2025 14:10
Self Signed Certificate with Custom Root CA

Create Root CA (Done once)

Create Root Key

Attention: this is the key used to sign the certificate requests, anyone holding this can sign certificates on your behalf. So keep it in a safe place!

openssl genrsa -des3 -out rootCA.key 4096
#!/bin/bash
# Download and build libcurl, openssl and zlib for Android using Crystax NDK r7
# Must be run on 32 bit Linux as the Crystax r7 NDK doesn't support 64 bit hosts
# Tested on Ubuntu 14.04
# Make the working directory
mkdir curl-android-build
cd curl-android-build
ROOT_DIR=`pwd -P`