migrate from CAS to Oauth2-JWT Auth (#197)
Co-authored-by: Michael Hoennig <michael@hoennig.de> Reviewed-on: https://dev.hostsharing.net/hostsharing/hs.hsadmin.ng/pulls/197 Reviewed-by: Marc Sandlus <marc.sandlus@hostsharing.net>
This commit is contained in:
Michael Hoennig
Executable
+279
@@ -0,0 +1,279 @@
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#!/bin/bash
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if [ "$1" == "--show-password" ]; then
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HSADMINNG_JWT_SHOW_PASSWORD=yes
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shift
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else
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HSADMINNG_JWT_SHOW_PASSWORD=
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fi
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if [ "$1" == "--trace" ]; then
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function trace() {
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echo "$*" >&2
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}
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function doCurl() {
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set -x
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if [ -z "$HSADMINNG_JWT_ASSUME" ]; then
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curl --fail-with-body \
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--header "Authorization: Bearer $HSADMINNG_JWT_TOKEN" \
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"$@"
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else
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curl --fail-with-body \
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--header "Authorization: Bearer $HSADMINNG_JWT_TOKEN" \
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--header "assumed-roles: $HSADMINNG_JWT_ASSUME" \
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"$@"
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fi
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set +x
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echo
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}
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shift
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else
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function trace() {
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: # noop
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}
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function doCurl() {
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if [ -z "$HSADMINNG_JWT_ASSUME" ]; then
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curl --fail-with-body --header "Authorization: Bearer $HSADMINNG_JWT_TOKEN" "$@"
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else
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curl --fail-with-body \
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--header "Authorization: Bearer $HSADMINNG_JWT_TOKEN" \
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--header "assumed-roles: $HSADMINNG_JWT_ASSUME" \
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"$@"
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echo
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fi
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}
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fi
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export HSADMINNG_JWT_ASSUME_HEADER
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if [ -f ~/.cas-curl-assume ]; then
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HSADMINNG_JWT_ASSUME="$(cat ~/.cas-curl-assume)"
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else
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HSADMINNG_JWT_ASSUME=
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fi
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if [ -z "$HSADMINNG_JWT_TOKEN_URL" ]; then
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cat >&2 <<EOF
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ERROR: environment incomplete
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please set the following environment variables:
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export HSADMINNG_JWT_TOKEN_URL=https://login.hostsharing.net/oauth/token
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export HSADMINNG_JWT_USERNAME=<<optionally, your username, or leave empty after '='>>
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export HSADMINNG_JWT_PASSWORD=<<optionally, your password, or leave empty after '='>>
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EOF
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exit 1
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fi
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function jwtCurlDocumentation() {
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cat <<EOF
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curl-wrapper utilizing JWT-authentication for hsadmin-ng
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usage: $0 [--trace] [--show-password] <<command>> [parameters]
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commands:
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EOF
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# filters out help texts (containing double-# and following lines with leading single-#) from the commands itself
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# (the '' makes sure that this line is not found, just the lines with actual help texts)
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sed -n '/#''#/ {x; p; x; s/#''#//; p; :a; n; /^[[:space:]]*#/!b; s/^[[:space:]]*#//; p; ba}' <$0
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}
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function jwtLogin() {
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# JWT token exists and not expired?
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if [ -f ~/.jwt-token ]; then
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# Check if token is still valid (simple expiry check - you might want to add JWT parsing for more precise validation)
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if find ~/.jwt-token -type f -size +0c -mmin -55 2>/dev/null | grep -q .; then
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HSADMINNG_JWT_TOKEN=$(<~/.jwt-token)
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return
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fi
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fi
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if [ -z "$HSADMINNG_JWT_USERNAME" ]; then
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read -e -p "Username: " HSADMINNG_JWT_USERNAME
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fi
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if [ -z "$HSADMINNG_JWT_PASSWORD" ]; then
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read -s -e -p "Password: " HSADMINNG_JWT_PASSWORD
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fi
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if [ "$HSADMINNG_JWT_SHOW_PASSWORD" == "yes" ]; then
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HSADMINNG_JWT_PASSWORD_DISPLAY=$HSADMINNG_JWT_PASSWORD
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else
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HSADMINNG_JWT_PASSWORD_DISPLAY="<<password hidden - use --show-password to show>>"
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fi
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# OAuth2 Resource Owner Password Credentials Grant (public client)
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trace "+ curl --fail-with-body --show-error -X POST \
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-H 'Content-Type: application/x-www-form-urlencoded' \
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-d \"grant_type=password&username=$HSADMINNG_JWT_USERNAME&password=$HSADMINNG_JWT_PASSWORD_DISPLAY\" \
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$HSADMINNG_JWT_TOKEN_URL -o ~/.jwt-token.response"
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JWT_RESPONSE=$(curl --fail-with-body --show-error -X POST \
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-H 'Content-Type: application/x-www-form-urlencoded' \
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-d "grant_type=password&username=$HSADMINNG_JWT_USERNAME&password=$HSADMINNG_JWT_PASSWORD" \
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$HSADMINNG_JWT_TOKEN_URL 2>&1 | tee ~/.jwt-token.response)
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# Extract access token from JSON response
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HSADMINNG_JWT_TOKEN=$(echo "$JWT_RESPONSE" | grep -o '"access_token":"[^"]*' | cut -d'"' -f4)
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if [ -z "$HSADMINNG_JWT_TOKEN" ]; then
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echo "ERROR: could not get JWT access token: $JWT_RESPONSE" >&2
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echo >&2
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exit 1
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fi
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echo "$HSADMINNG_JWT_TOKEN" > ~/.jwt-token
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trace "JWT Token acquired (length: ${#HSADMINNG_JWT_TOKEN})"
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}
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function jwtLogout() {
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rm -f ~/.jwt-token ~/.jwt-token.response
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}
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function jwtValidate() {
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if [ ! -f ~/.jwt-token ]; then
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echo "ERROR: no JWT token found, please login first" >&2
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exit 1
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fi
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HSADMINNG_JWT_TOKEN=$(<~/.jwt-token)
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# Simple JWT validation - decode payload (base64 decode the middle part)
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JWT_PAYLOAD=$(echo "$HSADMINNG_JWT_TOKEN" | cut -d'.' -f2)
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# Add padding if needed for base64 decoding
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case $((${#JWT_PAYLOAD} % 4)) in
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2) JWT_PAYLOAD="${JWT_PAYLOAD}==" ;;
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3) JWT_PAYLOAD="${JWT_PAYLOAD}=" ;;
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esac
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if command -v base64 >/dev/null 2>&1; then
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JWT_DECODED=$(echo "$JWT_PAYLOAD" | base64 -d 2>/dev/null)
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if [ $? -eq 0 ]; then
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OAUTH_USER=$(echo "$JWT_DECODED" | grep -o '"sub":"[^"]*' | cut -d'"' -f4)
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if [ -z "$OAUTH_USER" ]; then
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OAUTH_USER=$(echo "$JWT_DECODED" | grep -o '"preferred_username":"[^"]*' | cut -d'"' -f4)
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fi
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if [ -z "$OAUTH_USER" ]; then
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OAUTH_USER=$(echo "$JWT_DECODED" | grep -o '"username":"[^"]*' | cut -d'"' -f4)
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fi
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if [ -n "$OAUTH_USER" ]; then
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echo "OAuth User: $OAUTH_USER"
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# Check expiry
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EXP=$(echo "$JWT_DECODED" | grep -o '"exp":[0-9]*' | cut -d':' -f2)
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if [ -n "$EXP" ]; then
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CURRENT_TIME=$(date +%s)
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if [ "$EXP" -lt "$CURRENT_TIME" ]; then
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echo "WARNING: JWT token has expired" >&2
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else
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echo "Token expires: $(date -d "@$EXP" 2>/dev/null || date -r "$EXP" 2>/dev/null || echo "unknown")"
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fi
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fi
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else
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echo "Could not extract user from JWT token" >&2
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fi
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else
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echo "Could not decode JWT token" >&2
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fi
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else
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echo "JWT token present but cannot validate (base64 command not available)" >&2
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fi
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}
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function jwtToken() {
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if [ ! -f ~/.jwt-token ]; then
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echo "ERROR: no JWT token found, please login first" >&2
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exit 1
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fi
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HSADMINNG_JWT_TOKEN=$(<~/.jwt-token)
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echo "$HSADMINNG_JWT_TOKEN"
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}
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case "${1,,}" in
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# -- generic commands --------------------------------------------------------------------------
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""|"-h"|"--help"|"help") ## prints documentation about commands and options
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jwtCurlDocumentation
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exit
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;;
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"env") ## prints all related HSADMINNG_JWT_... environment variables; use '--show-password' to show the password as well
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# example: jwt-curl -show-password env
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echo "export HSADMINNG_JWT_TOKEN_URL=$HSADMINNG_JWT_TOKEN_URL"
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echo "export HSADMINNG_JWT_USERNAME=$HSADMINNG_JWT_USERNAME"
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if [ "$HSADMINNG_JWT_SHOW_PASSWORD" == "yes" ]; then
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echo "export HSADMINNG_JWT_PASSWORD=$HSADMINNG_JWT_PASSWORD"
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elif [ -z "$HSADMINNG_JWT_PASSWORD" ]; then
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echo "export HSADMINNG_JWT_PASSWORD=#<<not given>>"
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else
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echo "export HSADMINNG_JWT_PASSWORD=#<<given, but hidden - add --show-password to show>>"
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fi
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;;
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# --- authentication-related commands ------------------------------------------------------------
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"login") ## reads username+password and fetches JWT access token (bypasses HSADMINNG_JWT_USERNAME+HSADMINNG_JWT_PASSWORD)
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# example: jwt-curl login
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jwtLogout
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export HSADMINNG_JWT_USERNAME=
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export HSADMINNG_JWT_PASSWORD=
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jwtLogin
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;;
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"assume") ## assumes the given comma-separated roles
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# example using object-id-name: jwt-curl assume 'hs_office.relation#ExampleMandant-with-PARTNER-ExamplePartner:AGENT'
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# example using object-uuid: jwt-curl assume 'hs_office.relation#1d3bc468-c5c8-11ef-9d0d-4751ecfda2b7:AGENT'
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shift
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if [ -z "$1" ]; then
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echo "ERROR: requires comma-separated list of roles to assume" >&2
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exit 1
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fi
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echo "$1" >~/.cas-curl-assume
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;;
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"unassume") ## do not assume any particular role anymore, use the plain user as RBAC subject
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rm -f ~/.cas-curl-assume
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;;
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"token") ## prints the current JWT access token
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jwtToken
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;;
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"validate") ## validates current JWT token and prints currently logged in user
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jwtValidate
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;;
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"logout") ## logout, deletes JWT token
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jwtLogout
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;;
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# --- HTTP-commands ----------------------------------------------------------------------
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"get") ## HTTP GET, add URL as parameter
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# example: jwt-curl GET http://localhost:8080/api/hs/office/partners/P-10003 | jq
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# hint: '| jq' is just for human-readable formatted JSON output
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shift
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jwtLogin
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doCurl "$*"
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;;
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"post") ## HTTP POST, add curl options to specify the request body and the URL as last parameter
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# example: jwt-curl POST \
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# -d '{ "prefix":"ttt", "reference":80001, "adminUserName":"admin@ttt.example.com" }' \
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# http://localhost:8080/api/test/customers | jq
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# hint: '| jq' is just for human-readable formatted JSON output
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shift
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jwtLogin
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doCurl --header "Content-Type: application/json" -X POST "$@"
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;;
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"patch") ## HTTP PATCH, add curl options to specify the request body and the URL as last parameterparameter
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# example: jwt-curl PATCH \
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# -d '{ "reference":80002 }' \
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# http://localhost:8080/api/test/customers/ae90ac2a-4728-4ca9-802e-a0d0108b2324 | jq
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# hint: '| jq' is just for human-readable formatted JSON output
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shift
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jwtLogin
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doCurl --header "Content-Type: application/json" -X POST "$*"
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;;
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# --- unknown command --------------------------------------------------------------------
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*)
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cat >&2 <<EOF
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unknown command: '$1'
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valid commands: help, login, logout, validate, get, post, patch, delete
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EOF
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exit 1
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;;
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esac
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