sshGetMD5Fingerprint.sh

#!/bin/bash



if [[ -n "$TRACE" ]]; then
    export PS4='[\D{%FT%TZ}] ${BASH_SOURCE}:${LINENO}: ${FUNCNAME[0]:+${FUNCNAME[0]}(): }'
    set -o xtrace
fi
set -o errexit
set -o pipefail

# Return ssh fingerprint in the form "he:xh:ex:he:xh:..."
# OpenSSH_6.8 changes the -l flag output.
function sshGetMD5Fingerprint() {
	local sshPubKeyPath=$1
	local s
	s=$(ssh-keygen -E md5 -l -f "$sshPubKeyPath" 2> /dev/null)
	if [[ $? -eq  0 ]]; then
		echo "$s" | awk '{print $2}' | tr -d '\n' | cut -d: -f2-;
	else 
		# OpenSSH version < 6.8
		ssh-keygen -l -f "$sshPubKeyPath" | awk '{print $2}' | tr -d '\n';
	fi
}

# ---- mainline
echo $(sshGetMD5Fingerprint ".ssh/id_rsa.pub")