diff --git a/deploy/synology_dsm.sh b/deploy/synology_dsm.sh
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+++ b/deploy/synology_dsm.sh
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+#!/usr/bin/env sh
+
+# Here is a script to deploy cert to Synology DSM
+#
+# it requires the jq and curl are in the $PATH and the following
+# environment variables must be set:
+#
+# SYNO_Username - Synology Username to login (must be an administrator)
+# SYNO_Password - Synology Password to login
+# SYNO_Certificate - Certificate description to target for replacement
+#
+# The following environmental variables may be set if you don't like their
+# default values:
+#
+# SYNO_Scheme - defaults to http
+# SYNO_Hostname - defaults to localhost
+# SYNO_Port - defaults to 5000
+#
+#returns 0 means success, otherwise error.
+
+########  Public functions #####################
+
+_syno_get_cookie_data() {
+  grep "\W$1=" "$HTTP_HEADER" | grep "^Set-Cookie:" | _tail_n 1 | _egrep_o "$1=[^;]*;" | tr -d ';'
+}
+
+#domain keyfile certfile cafile fullchain
+synology_dsm_deploy() {
+
+  _cdomain="$1"
+  _ckey="$2"
+  _ccert="$3"
+  _cca="$4"
+
+  _debug _cdomain "$_cdomain"
+
+  # Get Username and Password, but don't save until we successfully authenticate
+  _getdeployconf SYNO_Username
+  _getdeployconf SYNO_Password
+  _getdeployconf SYNO_Create
+  if [ -z "$SYNO_Username" ] || [ -z "$SYNO_Password" ]; then
+    SYNO_Username=""
+    SYNO_Password=""
+    _err "SYNO_Username & SYNO_Password must be set"
+    return 1
+  fi
+  _debug2 SYNO_Username "$SYNO_Username"
+  _secure_debug2 SYNO_Password "$SYNO_Password"
+
+  # Optional scheme, hostname, and port for Synology DSM
+  _getdeployconf SYNO_Scheme
+  _getdeployconf SYNO_Hostname
+  _getdeployconf SYNO_Port
+
+  # default vaules for scheme, hostname, and port
+  # defaulting to localhost and http because it's localhost...
+  [ -n "${SYNO_Scheme}" ] || SYNO_Scheme="http"
+  [ -n "${SYNO_Hostname}" ] || SYNO_Hostname="localhost"
+  [ -n "${SYNO_Port}" ] || SYNO_Port="5000"
+
+  _savedeployconf SYNO_Scheme "$SYNO_Scheme"
+  _savedeployconf SYNO_Hostname "$SYNO_Hostname"
+  _savedeployconf SYNO_Port "$SYNO_Port"
+
+  _debug2 SYNO_Scheme "$SYNO_Scheme"
+  _debug2 SYNO_Hostname "$SYNO_Hostname"
+  _debug2 SYNO_Port "$SYNO_Port"
+
+  # Get the certificate description, but don't save it until we verfiy it's real
+  _getdeployconf SYNO_Certificate
+  if [ -z "${SYNO_Certificate:?}" ]; then
+    _err "SYNO_Certificate needs to be defined (with the Certificate description name)"
+    return 1
+  fi
+  _debug SYNO_Certificate "$SYNO_Certificate"
+
+  _base_url="$SYNO_Scheme://$SYNO_Hostname:$SYNO_Port"
+  _debug _base_url "$_base_url"
+
+  # Login, get the token from JSON and session id from cookie
+  _info "Logging into $SYNO_Hostname:$SYNO_Port"
+  response=$(_get "$_base_url/webman/login.cgi?username=$SYNO_Username&passwd=$SYNO_Password&enable_syno_token=yes")
+  token=$(echo "$response" | grep "SynoToken" | sed -n 's/.*"SynoToken" *: *"\([^"]*\).*/\1/p')
+  _debug3 response "$response"
+
+  if [ -z "$token" ]; then
+    _err "Unable to authenticate to $SYNO_Hostname:$SYNO_Port using $SYNO_Scheme."
+    _err "Check your username and password."
+    return 1
+  fi
+
+  _H1="Cookie: $(_syno_get_cookie_data "id"); $(_syno_get_cookie_data "smid")"
+  _H2="X-SYNO-TOKEN: $token"
+  export _H1
+  export _H2
+  _debug2 H1 "${_H1}"
+  _debug2 H2 "${_H2}"
+
+  # Now that we know the username and password are good, save them
+  _savedeployconf SYNO_Username "$SYNO_Username"
+  _savedeployconf SYNO_Password "$SYNO_Password"
+  _debug token "$token"
+
+  _info "Getting certificates in Synology DSM"
+  response=$(_post "api=SYNO.Core.Certificate.CRT&method=list&version=1" "$_base_url/webapi/entry.cgi")
+  _debug3 response "$response"
+  id=$(echo "$response" | sed -n "s/.*\"desc\":\"$SYNO_Certificate\",\"id\":\"\([^\"]*\).*/\1/p")
+  _debug2 id "$id"
+
+  if [ -z "$id" ] && [ -z "${SYNO_Create:?}" ]; then
+    _err "Unable to find certificate: $SYNO_Certificate and \$SYNO_Create is not set"
+    return 1
+  fi
+
+  # we've verified this certificate description is a thing, so save it
+  _savedeployconf SYNO_Certificate "$SYNO_Certificate"
+
+  default=false
+  if echo "$response" | sed -n "s/.*\"desc\":\"$SYNO_Certificate\",\([^{]*\).*/\1/p" | grep -- 'is_default":true' >/dev/null; then
+    default=true
+  fi
+  _debug2 default "$default"
+
+  _info "Generate form POST request"
+  nl="\015\012"
+  delim="--------------------------$(_utc_date | tr -d -- '-: ')"
+  content="--$delim${nl}Content-Disposition: form-data; name=\"key\"; filename=\"$(basename "$_ckey")\"${nl}Content-Type: application/octet-stream${nl}${nl}$(cat "$_ckey")\012"
+  content="$content${nl}--$delim${nl}Content-Disposition: form-data; name=\"cert\"; filename=\"$(basename "$_ccert")\"${nl}Content-Type: application/octet-stream${nl}${nl}$(cat "$_ccert")\012"
+  content="$content${nl}--$delim${nl}Content-Disposition: form-data; name=\"inter_cert\"; filename=\"$(basename "$_cca")\"${nl}Content-Type: application/octet-stream${nl}${nl}$(cat "$_cca")\012"
+  content="$content${nl}--$delim${nl}Content-Disposition: form-data; name=\"id\"${nl}${nl}$id"
+  content="$content${nl}--$delim${nl}Content-Disposition: form-data; name=\"desc\"${nl}${nl}${SYNO_Certificate}"
+  content="$content${nl}--$delim${nl}Content-Disposition: form-data; name=\"as_default\"${nl}${nl}${default}"
+  content="$content${nl}--$delim--${nl}"
+  content="$(printf "%b_" "$content")"
+  content="${content%_}" # protect trailing \n
+
+  _info "Upload certificate to the Synology DSM"
+  response=$(_post "$content" "$_base_url/webapi/entry.cgi?api=SYNO.Core.Certificate&method=import&version=1&SynoToken=$token" "" "POST" "multipart/form-data; boundary=${delim}")
+  _debug3 response "$response"
+
+  if ! echo "$response" | grep '"error":' >/dev/null; then
+    if echo "$response" | grep '"restart_httpd":true' >/dev/null; then
+      _info "http services were restarted"
+    else
+      _info "http services were NOT restarted"
+    fi
+    return 0
+  else
+    _err "Unable to update certificate, error code $response"
+    return 1
+  fi
+}