CFSSL HOWTO

https://github.com/cloudflare/cfssl

Generate Fake Root CA

cfssl genkey -initca config/rootCA.json | cfssljson -bare generated/rootCA

Generate Fake Intermediate Root CA

cfssl gencert -ca=generated/rootCA.pem -ca-key=generated/rootCA-key.pem -config=config/cfssl.json -profile=intermediate_ca config/intermediateCA.json | cfssljson -bare generated/intermediateCA

Generate client & server certificates

# server certificate signed by Fake Intermediate CA
cfssl gencert -ca=generated/intermediateCA.pem -ca-key=generated/intermediateCA-key.pem -config=config/cfssl.json -profile=server config/server.json | cfssljson -bare generated/server

# client certificate signed by Fake Intermediate CA
cfssl gencert -ca=generated/intermediateCA.pem -ca-key=generated/intermediateCA-key.pem -config=config/cfssl.json -profile=client config/client.json | cfssljson -bare generated/client

Certificate SHA-256 fingerprint

# will return in aa:bb:xx format
openssl x509 -noout -fingerprint -sha256 -in generated/client.pem
# will return in aabbxx format
openssl x509 -in generated/client.pem -outform der | sha256sum

Certificate serial

# will return in aa:bb:xx format
openssl x509 -noout -serial -in generated/client.pem | cut -d'=' -f2 | sed 's/../&:/g;s/:$//'
# will return in aabbxx format
openssl x509 -noout -serial -in generated/client.pem