From d5674c85d7735f2f3cdf6e44c2f9f1059d844d20 Mon Sep 17 00:00:00 2001 From: Ed Lynes Date: Fri, 21 Aug 2020 17:15:18 -0400 Subject: [PATCH] initial commit --- dnsapi/dns_edgedns.sh | 379 ++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 379 insertions(+) create mode 100755 dnsapi/dns_edgedns.sh diff --git a/dnsapi/dns_edgedns.sh b/dnsapi/dns_edgedns.sh new file mode 100755 index 00000000..75ef4f9b --- /dev/null +++ b/dnsapi/dns_edgedns.sh @@ -0,0 +1,379 @@ +#!/usr/bin/env sh + +# Akamai Edge DNS v2 API +# User must provide Open Edgegrid API credentials to the EdgeDNS installation. The remote user in EdgeDNS must have CRUD access to +# Edge DNS Zones and Recordsets, e.g. DNS—Zone Record Management authorization + +# Report bugs to https://control.akamai.com/apps/support-ui/#/contact-support + +# Values to export: +# --EITHER-- +# *** NOT IMPLEMENTED YET *** +# specify Edgegrid credentials file and section +# AKAMAI_EDGERC= +# AKAMAI_EDGERC_SECTION="default" +## --OR-- +# specify indiviual credentials +# export AKAMAI_HOST = +# export AKAMAI_ACCESS_TOKEN = +# export AKAMAI_CLIENT_TOKEN = +# export AKAMAI_CLIENT_SECRET = + +ACME_EDGEDNS_VERSION="0.1.0" + +######## Public functions ##################### + +# Usage: dns_edgedns_add _acme-challenge.www.domain.com "XKrxpRBosdIKFzxW_CT3KLZNf6q0HG9i01zxXp5CPBs" +# Used to add txt record +# +dns_edgedns_add() { + fulldomain=$1 + txtvalue=$2 + + _debug "ENTERING DNS_EDGEDNS_ADD" + + _debug2 "fulldomain" "$fulldomain" + _debug2 "txtvalue" "$txtvalue" + + if ! _EDGEDNS_credentials; then + _err "$@" + return 1 + fi + + if ! _EDGEDNS_getZoneInfo "$fulldomain"; then + _err "Invalid domain" + return 1 + fi + _debug2 "Add: zone" "${zone}" + acmeRecordURI=$(printf "%s/%s/names/%s/type/TXT" "${edge_endpoint}" "${zone}" "${fulldomain}") + _debug3 "Add URL" "$acmeRecordURI" + # Get existing TXT record + _edge_result=$(_edgedns_rest GET "$acmeRecordURI") + _api_status="$?" + if [ "$_api_status" -ne 0 ] && [ "$_edge_result" != "404" ]; then + _err "$(printf "Failure accessing Akamai Edge DNS API Server. Error: %s" "$_edge_result")" + return 1 + fi + rdata="\"$txtvalue\"" + record_op="POST" + if [ "$_api_status" -eq 0 ]; then + # record already exists. Get existing record data and update + record_op="PUT" + rdlist=$(echo -n "$response" | _egrep_o "\"rdata\"\\s*:\\s*\\[\\s*\"[^\"]*\"\\s*]" | cut -d : -f 2 | tr -d "[]\"") + _debug2 "existing TXT found" + _debug2 "record data" "$rdlist" + # value already there? + if _contains "$rdlist" "$txtvalue" ; then + return 0 + fi + comma="," + rdata="$rdata$comma\"${txtvalue}\"" + fi + _debug2 "new/updated rdata: " "${rdata}" + # Add the txtvalue TXT Record + body="{\"name\":\"$fulldomain\",\"type\":\"TXT\",\"ttl\":600, \"rdata\":"[${rdata}]"}" + _debug3 "Add body '${body}'" + _edge_result=$(_edgedns_rest "$record_op" "$acmeRecordURI" "$body") + _api_status="$?" + if [ "$_api_status" -eq 0 ]; then + _log "$(printf "Text value %s added to recordset %s" "${txtvalue}" "${fulldomain}")" + return 0 + else + _err "$(printf "error adding TXT record for validation. Error: %s" "$_edge_result")" + return 1 + fi +} + +# Usage: dns_edgedns_rm _acme-challenge.www.domain.com +# Used to delete txt record +# +dns_edgedns_rm() { + fulldomain=$1 +} + +#################### Private functions below ################################## + +_EDGEDNS_credentials() { + _debug "GettingEdge DNS credentials" + _log $(printf "ACME DNSAPI Edge DNS version %s" ${ACME_EDGEDNS_VERSION}) + args_missing=0 + if [ -z "${AKAMAI_ACCESS_TOKEN}" ]; then + AKAMAI_ACCESS_TOKEN="" + AKAMAI_CLIENT_TOKEN="" + AKAMAI_HOST="" + AKAMAI_CLIENT_SECRET="" + _err "AKAMAI_ACCESS_TOKEN is missing" + args_missing=1 + fi + if [ -z "$AKAMAI_CLIENT_TOKEN" ]; then + AKAMAI_ACCESS_TOKEN="" + AKAMAI_CLIENT_TOKEN="" + AKAMAI_HOST="" + AKAMAI_CLIENT_SECRET="" + _err "AKAMAI_CLIENT_TOKEN is missing" + args_missing=1 + fi + if [ -z "${AKAMAI_HOST}" ]; then + AKAMAI_ACCESS_TOKEN="" + AKAMAI_CLIENT_TOKEN="" + AKAMAI_HOST="" + AKAMAI_CLIENT_SECRET="" + _err "AKAMAI_HOST is missing" + args_missing=1 + fi + if [ -z "${AKAMAI_CLIENT_SECRET}" ]; then + AKAMAI_ACCESS_TOKEN="" + AKAMAI_CLIENT_TOKEN="" + AKAMAI_HOST="" + AKAMAI_CLIENT_SECRET="" + _err "AKAMAI_CLIENT_SECRET is missing" + args_missing=1 + fi + + if [ "${args_missing}" = 1 ]; then + _err "You have not properly specified the EdgeDNS Open Edgegrid API credentials. Please try again." + return 1 + else + _saveaccountconf_mutable AKAMAI_ACCESS_TOKEN "${AKAMAI_ACCESS_TOKEN}" + _saveaccountconf_mutable AKAMAI_CLIENT_TOKEN "${AKAMAI_CLIENT_TOKEN}" + _saveaccountconf_mutable AKAMAI_HOST "${AKAMAI_HOST}" + _saveaccountconf_mutable AKAMAI_CLIENT_SECRET "${AKAMAI_CLIENT_SECRET}" + # Set whether curl should use secure or insecure mode + fi + export HTTPS_INSECURE=0 # All Edgegrid API calls are secure + edge_endpoint=$(printf "https://%s/config-dns/v2/zones" "${AKAMAI_HOST}") + _debug3 "Edge API Endpoint:" "${edge_endpoint}" + +} + +_EDGEDNS_getZoneInfo() { + _debug "Getting Zoneinfo" + zoneEnd=false + curZone=$1 + while [ -n "${zoneEnd}" ]; do + # we can strip the first part of the fulldomain, since its just the _acme-challenge string + curZone="${curZone#*.}" + # suffix . needed for zone -> domain.tld. + # create zone get url + get_zone_url=$(printf "%s/%s" "${edge_endpoint}" "${curZone}") + _debug3 "Zone Get: " "${get_zone_url}" + curResult=$(_edgedns_rest GET "$get_zone_url") + retVal=$? + if [ $retVal -ne 0 ]; then + if ["$curResult" != "404" ]; then + _err "$(printf "Managed zone validation failed. Error response: %s" "$retVal")" + return 1 + fi + fi + + if _contains "${curResult}" "\"zone\":" ; then + _debug2 "Zone data" "${curResult}" + zone=$(echo -n "${curResult}" | _egrep_o "\"zone\"\\s*:\\s*\"[^\"]*\"" | _head_n 1 | cut -d : -f 2 | tr -d "\"") + _debug2 "Zone" "${zone}" + zoneFound="" + zoneEnd="" + return 0 + fi + + if [ "${curZone#*.}" != "$curZone" ]; then + _debug2 $(printf "%s still contains a '.' - so we can check next higher level" "$curZone") + else + zoneEnd=true + _err "Couldn't retrieve zone data." + return 1 + fi + done + _err "Failed to retrieve zone data." + return 2 +} + +_edgedns_headers="" + +_edgedns_rest() { + _debug "Handling API Request" + m=$1 + # Assume endpoint is complete path, including query args if applicable + ep=$2 + body_data=$3 + _edgedns_content_type="" + _request_url_path="$ep" + _request_body="$body_data" + _request_method="$m" + _edgedns_headers="" + tab="" + _edgedns_headers="${_edgedns_headers}${tab}Host: ${AKAMAI_HOST}" + tab="\t" + # Set in acme.sh _post/_get + #_edgedns_headers="${_edgedns_headers}${tab}User-Agent:ACME DNSAPI Edge DNS version ${ACME_EDGEDNS_VERSION}" + _edgedns_headers="${_edgedns_headers}${tab}Accept: application/json" + if [ "$m" != "GET" ] && [ "$m" != "DELETE" ] ; then + _edgedns_content_type="application/json;charset=UTF-8" + _utf8_body_data="$(echo -n "$ _request_body" | iconv -t utf-8)" + _utf8_body_len="$(echo -n "$_utf8_body_data" | awk '{print length}')" + _edgedns_headers="${_edgedns_headers}${tab}Content-Length: ${_utf8_body_len}" + fi + _made_auth_header=$(_edgedns_make_auth_header) + _edgedns_headers="${_edgedns_headers}${tab}Authorization: ${_made_auth_header}" + _secure_debug2 "Made Auth Header" "${_made_auth_header}" + hdr_indx=1 + work_header="${_edgedns_headers}${tab}" + _debug3 "work_header" "${work_header}" + while [ "${work_header}" ]; do + entry="${work_header%%\\t*}"; work_header="${work_header#*\\t}" + export "$(printf "_H%s=%s" "${hdr_indx}" "${entry}")" + _debug2 "Request Header " "${entry}" + hdr_indx=$(( hdr_indx + 1 )) + done + + # clear headers from previous request to avoid getting wrong http code on timeouts + :>"$HTTP_HEADER" + _debug "$ep" + if [ "$m" != "GET" ]; then + _debug "Method data" "$data" + # body url [needbase64] [POST|PUT|DELETE] [ContentType] + response="$(_post "$_utf8_body_data" "$ep" false "$m")" + else + response="$(_get "$ep")" + fi + + _ret="$?" + _debug "response" "$response" + _code="$(grep "^HTTP" "$HTTP_HEADER" | _tail_n 1 | cut -d " " -f 2 | tr -d "\\r\\n")" + _debug2 "http response code" "$_code" + + if [ "$_code" = "200" ] || [ "$_code" = "201" ]; then + # All good + response="$(echo "$response" | _normalizeJson)" + echo -n "${response}" + return 0 + fi + + if [ "$_code" = "204" ]; then + # Success, no body + echo -n "" + return 0 + fi + + if [ "$_code" = "400" ]; then + _err "Bad request presented" + _log "$(printf "Headers: %s" "$_edgedns_headers")" + _log "$(printf "Method: %s" "$_request_method")" + _log "$(printf "URL: %s" "$ep")" + _log "$(printf "Data: %s" "$data")" + fi + + if [ "$_code" = "403" ]; then + _err "access denied make sure your Edgegrid cedentials are correct." + fi + + echo "$_code" + return 1 +} + +_edgedns_eg_timestamp() { + _eg_timestamp=$(date -u "+%Y%m%dT%H:%M:%S+0000") +} + +_edgedns_new_nonce() { + _nonce=$(uuidgen -r) +} + +_edgedns_make_auth_header() { + _debug "Constructing Auth Header" + _edgedns_eg_timestamp + _edgedns_new_nonce + # "Unsigned authorization header: 'EG1-HMAC-SHA256 client_token=block;access_token=block;timestamp=20200806T14:16:33+0000;nonce=72cde72c-82d9-4721-9854-2ba057929d67;'" + _auth_header="$(printf "EG1-HMAC-SHA256 client_token=%s;access_token=%s;timestamp=%s;nonce=%s;" "${AKAMAI_CLIENT_TOKEN}" "${AKAMAI_ACCESS_TOKEN}" "${_eg_timestamp}" "${_nonce}")" + _secure_debug2 "Unsigned Auth Header: " "$_auth_header" + + _sig="$(_edgedns_sign_request)" + _signed_auth_header="$(printf "%ssignature=%s" "${_auth_header}" "${_sig}")" + _secure_debug2 "Signed Auth Header: " "${_signed_auth_header}" + echo -n "${_signed_auth_header}" +} + +_edgedns_sign_request() { + _debug2 "Signing http request" + _signed_data=$(_edgedns_make_data_to_sign "${_auth_header}") + _secure_debug2 "Returned signed data" "$_signed_data" + _key=$(_edgedns_make_signing_key "${_eg_timestamp}") + _signed_req=$(_edgedns_base64_hmac_sha256 "$_signed_data" "$_key") + _secure_debug2 "Signed Request" "${_signed_req}" + echo -n "${_signed_req}" +} + +_edgedns_make_signing_key() { + _debug2 "Creating sigining key" + ts=$1 + _signing_key=$(_edgedns_base64_hmac_sha256 "$ts" "${AKAMAI_CLIENT_SECRET}") + _secure_debug2 "Signing Key" "${_signing_key}" + echo -n "${_signing_key}" + +} + +_edgedns_make_data_to_sign() { + _debug2 "Processing data to sign" + hdr=$1 + _secure_debug2 "hdr" "$hdr" + content_hash=$(_edgedns_make_content_hash) + path="$(echo -n "${_request_url_path}" |sed 's/https\?:\/\///')" + path="${path#*$AKAMAI_HOST}" + _debug "hier path" "${path}" + # dont expose headers to sign so use MT string + data="$(printf "%s\thttps\t%s\t%s\t%s\t%s\t%s" "${_request_method}" "${AKAMAI_HOST}" "${path}" "" "${content_hash}" "$hdr")" + _secure_debug2 "Data to Sign" "${data}" + echo -n "${data}" +} + +_edgedns_make_content_hash() { + _debug2 "Generating content hash" + prep_body="" + _hash="" + _debug2 "Request method" "${_request_method}" + if [ "${_request_method}" != "POST" ] || [ -z "${_request_body}" ]; then + echo -n "${prep_body}" + return 0 + fi + prep_body="$(echo -n "${_request_body}")" + _debug2 "Req body" "${prep_body}" + _hash=$(_edgedns_base64_sha256 "${prep_body}") + _debug2 "Content hash" "${_hash}" + echo -n "${_hash}" +} + +_edgedns_base64_hmac_sha256() { + _debug2 "Generating hmac" + data=$1 + key=$2 + encoded_data="$(echo -n "${data}" | iconv -t utf-8)" + encoded_key="$(echo -n "${key}" | iconv -t utf-8)" + _secure_debug2 "encoded data" "${encoded_data}" + _secure_debug2 "encoded key" "${encoded_key}" + #key_hex="$(_durl_replace_base64 "$key" | _dbase64 | _hex_dump | tr -d ' ')" + #data_sig="$(printf "%s" "$encoded_data" | _hmac sha256 "${key_hex}" | _base64 | _url_replace)" + + data_sig="$(echo -n "$encoded_data" | ${ACME_OPENSSL_BIN:-openssl} dgst -sha256 -hmac $encoded_key -binary | _base64)" + _secure_debug2 "data_sig:" "${data_sig}" + out="$(echo -n "${data_sig}" | iconv -f utf-8)" + _secure_debug2 "hmac" "${out}" + echo -n "${out}" +} + +_edgedns_base64_sha256() { + _debug2 "Creating sha256 digest" + trg=$1 + utf8_str="$(echo -n "${trg}" | iconv -t utf-8)" + _secure_debug2 "digest data" "$trg" + _secure_debug2 "encoded digest data" "${utf8_str}" + digest="$(echo -n "${trg}" | ${ACME_OPENSSL_BIN:-openssl} dgst -sha256 -binary | _base64)" + out="$(echo -n "${digest}" | iconv -f utf-8)" + _secure_debug2 "digest decode" "${out}" + echo -n "${out}" +} + +#_edgedns_parse_edgerc() { +# filepath=$1 +# section=$2 +#} + +