creds_setup.sh does not work on Windows

[bobaekang]

There are a couple of lines of bash code that does not work on Windows:

1. timestamp variable on line 41 includes colon(":"). This is used later when writing openssl keys to a disk location. The problem is that colon is not allowed as part of a file or folder name in Windows. See below for the code:
   

   compose-services/creds_setup.sh

   Lines 40 to 55 in 4b9509f

   	# make directories for temporary credentials
   	timestamp=$(date -u +"%Y-%m-%dT%H:%M:%SZ")
   	# generate private and public key for fence
   	yearMonth="$(date +%Y-%m)"
   	if [[ ! -d ./fenceJwtKeys ]] || ! (ls ./fenceJwtKeys | grep "$yearMonth" > /dev/null 2>&1); then
   	echo "Generating fence OAUTH key pairs under Secrets/fenceJwtKeys"
   	mkdir -p fenceJwtKeys
   	mkdir -p fenceJwtKeys/${timestamp}
   	openssl genpkey -algorithm RSA -out fenceJwtKeys/${timestamp}/jwt_private_key.pem \
   	-pkeyopt rsa_keygen_bits:2048
   	openssl rsa -pubout -in fenceJwtKeys/${timestamp}/jwt_private_key.pem \
   	-out fenceJwtKeys/${timestamp}/jwt_public_key.pem
   	chmod -R a+rx fenceJwtKeys
   	fi

2. SUBJ variable on line 82 is not preserved as defined when provided as parameter input to openssl req -sbj on line 84. For this code to work, the SUBJ string value has to be revised to SUBJ="//countryName=US\stateOrProvinceName=IL\localityName=Chicago\organizationName=CDIS\organizationalUnitName=PlanX\commonName=$commonName\emailAddress=cdis@uchicago.edu". Here is a related discussion on StackOverflow.
   See below for the code:
   

   compose-services/creds_setup.sh

   Lines 77 to 84 in 4b9509f

   	if ! [[ -f openssl.cnf && -f ca.pem && -f ca-key.pem ]]; then
   	echo "Generating a local certificate authority, and TLS certificates under Secrets/TLS/"
   	# erase old certs if they exist
   	/bin/rm -rf service.key service.crt
   	commonName=${1:-localhost}
   	SUBJ="/countryName=US/stateOrProvinceName=IL/localityName=Chicago/organizationName=CDIS/organizationalUnitName=PlanX/commonName=$commonName/emailAddress=cdis@uchicago.edu"
   	openssl req -new -x509 -nodes -extensions v3_ca -keyout ca-key.pem \
   	-out ca.pem -days 365 -subj $SUBJ $OPTS

I've tweaked the two lines mentioned above to get the script work using Git Bash on my machine running on Windows 10 Home.

It would be helpful if the script is modified to accommodate Windows users or at least that this repo's README.md mentions that the script is meant to be run on Linux/MacOS.