add a couple of useful functions back

quickstart/docker/image/ziti-cli-functions.sh

@@ -1498,4 +1498,43 @@ function waitForController {
   _wait_for_controller
 }
 
+function printUsage() {
+    echo "Usage: ${1-} [cert to test] [ca pool to use]"
+}
+
+function verifyCertAgainstPool() {
+  if [[ "" == "${1-}" ]]
+  then
+      printUsage "verifyCertAgainstPool"
+      return 1
+  fi
+
+  if [[ "" == "$2" ]]
+  then
+      printUsage "verifyCertAgainstPool"
+      return 1
+  fi
+
+  echo "    Verifying that this certificate:"
+  echo "        - ${1-}"
+  echo "    is valid for this ca pool:"
+  echo "        - $2"
+  echo ""
+  openssl verify -partial_chain -CAfile "$2" "${1-}"
+  # shellcheck disable=SC2181
+  if [ $? -eq 0 ]; then
+      echo ""
+      echo "============      SUCCESS!      ============"
+  else
+      echo ""
+      echo "============ FAILED TO VALIDATE ============"
+  fi
+}
+
+function showIssuerAndSubjectForPEM() {
+  echo "Displaying Issuer and Subject for cert pool:"
+  echo "    ${1-}"
+  openssl crl2pkcs7 -nocrl -certfile "${1-}" | openssl pkcs7 -print_certs -text -noout | grep -E "(Subject|Issuer)"
+}
 set +uo pipefail
+