From 3b9f48cfd6abf68c783aaff8ee91f77919d94e53 Mon Sep 17 00:00:00 2001
From: Michael Hoennig <michael@hoennig.de>
Date: Sat, 21 Dec 2024 15:30:16 +0100
Subject: [PATCH] add hsadmin-ng culr wrapper with CAS

---
 bin/hsadmin-ng | 140 +++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 140 insertions(+)
 create mode 100755 bin/hsadmin-ng

diff --git a/bin/hsadmin-ng b/bin/hsadmin-ng
new file mode 100755
index 00000000..40a0dc4e
--- /dev/null
+++ b/bin/hsadmin-ng
@@ -0,0 +1,140 @@
+#!/bin/bash
+
+if [ "$#" -eq 0 ]; then
+  cat <<EOF
+  curl-wrapper utilizing CAS-authentification for hsadmin-ng"
+  usage: $0 [--trace] <<command>> [parameters]
+
+  commands:
+EOF
+  grep '") ''# ' $0
+  exit
+fi
+
+if [ "$1" == "--trace" ]; then
+  function trace() {
+    echo "$*" >&2
+  }
+  function doCurl() {
+    set -x
+    curl "$@"
+    set +x
+  }
+  shift
+else
+  function trace() {
+    :
+  }
+  function doCurl() {
+    curl "$@"
+  }
+fi
+
+if [ -z "$HSADMINNG_CAS_LOGIN" ] || [ -z "$HSADMINNG_CAS_VALIDATE" ] || \
+   [ -z "$HSADMINNG_CAS_USERNAME" ] || [ -z "$HSADMINNG_CAS_PASSWORD" ] || \
+   [ -z "$HSADMINNG_CAS_SERVICE" ]; then
+  cat >&2 <<EOF
+  ERROR: environment incomplete
+
+  please set the following environment variables:
+  export HSADMINNG_CAS_LOGIN=https://login.hostsharing.net/cas/v1/tickets
+  export HSADMINNG_CAS_VALIDATE=https://login.hostsharing.net/cas/proxyValidate
+  export HSADMINNG_CAS_USERNAME=<<your username>>
+  export HSADMINNG_CAS_PASSWORD=<<your password>>
+  export HSADMINNG_CAS_SERVICE=https://hsadminng.hostsharing.net:443/
+EOF
+  exit 1
+fi
+
+function casLogin() {
+  HSADMINNG_CAS_TGT=`doCurl -s -i -X POST \
+        -H 'Content-Type: application/x-www-form-urlencoded' \
+        -d "username=$HSADMINNG_CAS_USERNAME&password=$HSADMINNG_CAS_PASSWORD" \
+        $HSADMINNG_CAS_LOGIN -o /dev/null -D - \
+        | grep -i "^Location: " |  sed -e 's/^Location: //' -e 's/\\r//'`
+      echo "$HSADMINNG_CAS_TGT" >~/.cas-login-tgt
+      trace "$HSADMINNG_CAS_TGT"
+}
+
+function casTicket() {
+  HSADMINNG_CAS_TGT=$(<~/.cas-login-tgt)
+  if [[ -z "$HSADMINNG_CAS_TGT" ]]; then
+    echo "ERROR: cannot get CAS ticket granting ticket for $HSADMINNG_CAS_USERNAME" >&2
+    exit 1
+  fi
+  trace "CAS-TGT: $HSADMINNG_CAS_TGT"
+
+  trace "fetching CAS service ticket"
+  trace "curl -s -d \"service=$HSADMINNG_CAS_SERVICE\" $HSADMINNG_CAS_TGT"
+  HSADMINNG_CAS_TICKET=$(curl -s -d "service=$HSADMINNG_CAS_SERVICE" $HSADMINNG_CAS_TGT)
+  if [[ -z "$HSADMINNG_CAS_TICKET" ]]; then
+    echo "ERROR: cannot get CAS service ticket" >&2
+    exit 1
+  fi
+
+  echo $HSADMINNG_CAS_TICKET
+}
+
+function casValidate() {
+  HSADMINNG_CAS_TICKET=`casTicket`
+
+  trace "validating CAS-TICKET: $HSADMINNG_CAS_TICKET"
+  trace curl -i -s $HSADMINNG_CAS_VALIDATE?ticket=${HSADMINNG_CAS_TICKET}\&service=${HSADMINNG_CAS_SERVICE}
+  HSADMINNG_CAS_USER=`curl -i -s $HSADMINNG_CAS_VALIDATE?ticket=${HSADMINNG_CAS_TICKET}\&service=${HSADMINNG_CAS_SERVICE} | grep -oPm1 "(?<=<cas:user>)[^<]+"`
+  if [ -z "$HSADMINNG_CAS_USER" ]; then
+    echo "validation failed" >&2
+    exit 1
+  fi
+  echo "CAS-User: $HSADMINNG_CAS_USER"
+}
+
+if ! find ~/.cas-login-tgt -type f -size +0c -mmin -60 2>/dev/null | grep -q .; then
+    casLogin
+fi
+
+case "$1" in
+  "login") # explicitly login using CAS-server and credentials in HSADMINNG_CAS_..., fetches ticket granting ticket
+    casLogin
+    ;;
+  "logout") # logout, deleting ticket granting ticket
+    rm ~/.cas-login-tgt
+    ;;
+  "validate") # validate user login and print currently logged in user
+    casValidate
+    ;;
+  "get") # HTTP GET, add URL as parameter
+    shift
+    HSADMINNG_CAS_TICKET=`casTicket`
+    #trace "curl -f -s --header \"Authorization: $HSADMINNG_CAS_TICKET\" " "$@"
+    doCurl -f -H "Authorization: $HSADMINNG_CAS_TICKET" "$*"
+    ;;
+  "post") # HTTP POST, add curl options to specify the request body and the URL as last parameter
+    shift
+    HSADMINNG_CAS_TICKET=`casTicket`
+    trace "curl -f --header \"Authorization: $HSADMINNG_CAS_TICKET\" --header \"Content-Type: application/json\" -X POST " "$@"
+    curl -f -H "Authorization: $HSADMINNG_CAS_TICKET" --header "Content-Type: application/json" -X POST "$@"
+    ;;
+  "patch") # HTTP PATCH, add curl options to specify the request body and the URL as last parameter
+    shift
+    HSADMINNG_CAS_TICKET=`casTicket`
+    trace "curl -f --header \"Authorization: $HSADMINNG_CAS_TICKET\" --header \"Content-Type: application/json\" -X PATCH " "$@"
+    curl -f -H "Authorization: $HSADMINNG_CAS_TICKET" --header "Content-Type: application/json" -X POST "$*"
+    ;;
+  "delete") # HTTP DELETE, add curl options to specify the request body and the URL as last parameter
+    shift
+    HSADMINNG_CAS_TICKET=`casTicket`
+    trace "curl -f --header \"Authorization: $HSADMINNG_CAS_TICKET\" -X DELETE " "$@"
+    curl -f -H "Authorization: $HSADMINNG_CAS_TICKET" -X POST "$@"
+    ;;
+  *)
+    cat >&2 <<EOF
+    unknown command: '$1'
+    valid commands: login, validate, curl
+EOF
+    exit 1
+    ;;
+esac
+
+
+
+