initial commit
This commit is contained in:
Ed Lynes
parent
e7a6c17260
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379
dnsapi/dns_edgedns.sh
Executable file
379
dnsapi/dns_edgedns.sh
Executable file
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#!/usr/bin/env sh
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# Akamai Edge DNS v2 API
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# User must provide Open Edgegrid API credentials to the EdgeDNS installation. The remote user in EdgeDNS must have CRUD access to
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# Edge DNS Zones and Recordsets, e.g. DNS—Zone Record Management authorization
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# Report bugs to https://control.akamai.com/apps/support-ui/#/contact-support
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# Values to export:
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# --EITHER--
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# *** NOT IMPLEMENTED YET ***
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# specify Edgegrid credentials file and section
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# AKAMAI_EDGERC=<full file path>
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# AKAMAI_EDGERC_SECTION="default"
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## --OR--
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# specify indiviual credentials
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# export AKAMAI_HOST = <host>
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# export AKAMAI_ACCESS_TOKEN = <access token>
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# export AKAMAI_CLIENT_TOKEN = <client token>
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# export AKAMAI_CLIENT_SECRET = <client secret>
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ACME_EDGEDNS_VERSION="0.1.0"
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######## Public functions #####################
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# Usage: dns_edgedns_add _acme-challenge.www.domain.com "XKrxpRBosdIKFzxW_CT3KLZNf6q0HG9i01zxXp5CPBs"
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# Used to add txt record
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#
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dns_edgedns_add() {
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fulldomain=$1
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txtvalue=$2
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_debug "ENTERING DNS_EDGEDNS_ADD"
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_debug2 "fulldomain" "$fulldomain"
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_debug2 "txtvalue" "$txtvalue"
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if ! _EDGEDNS_credentials; then
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_err "$@"
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return 1
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fi
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if ! _EDGEDNS_getZoneInfo "$fulldomain"; then
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_err "Invalid domain"
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return 1
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fi
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_debug2 "Add: zone" "${zone}"
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acmeRecordURI=$(printf "%s/%s/names/%s/type/TXT" "${edge_endpoint}" "${zone}" "${fulldomain}")
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_debug3 "Add URL" "$acmeRecordURI"
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# Get existing TXT record
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_edge_result=$(_edgedns_rest GET "$acmeRecordURI")
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_api_status="$?"
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if [ "$_api_status" -ne 0 ] && [ "$_edge_result" != "404" ]; then
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_err "$(printf "Failure accessing Akamai Edge DNS API Server. Error: %s" "$_edge_result")"
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return 1
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fi
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rdata="\"$txtvalue\""
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record_op="POST"
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if [ "$_api_status" -eq 0 ]; then
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# record already exists. Get existing record data and update
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record_op="PUT"
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rdlist=$(echo -n "$response" | _egrep_o "\"rdata\"\\s*:\\s*\\[\\s*\"[^\"]*\"\\s*]" | cut -d : -f 2 | tr -d "[]\"")
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_debug2 "existing TXT found"
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_debug2 "record data" "$rdlist"
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# value already there?
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if _contains "$rdlist" "$txtvalue" ; then
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return 0
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fi
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comma=","
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rdata="$rdata$comma\"${txtvalue}\""
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fi
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_debug2 "new/updated rdata: " "${rdata}"
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# Add the txtvalue TXT Record
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body="{\"name\":\"$fulldomain\",\"type\":\"TXT\",\"ttl\":600, \"rdata\":"[${rdata}]"}"
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_debug3 "Add body '${body}'"
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_edge_result=$(_edgedns_rest "$record_op" "$acmeRecordURI" "$body")
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_api_status="$?"
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if [ "$_api_status" -eq 0 ]; then
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_log "$(printf "Text value %s added to recordset %s" "${txtvalue}" "${fulldomain}")"
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return 0
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else
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_err "$(printf "error adding TXT record for validation. Error: %s" "$_edge_result")"
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return 1
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fi
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}
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# Usage: dns_edgedns_rm _acme-challenge.www.domain.com
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# Used to delete txt record
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#
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dns_edgedns_rm() {
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fulldomain=$1
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}
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#################### Private functions below ##################################
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_EDGEDNS_credentials() {
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_debug "GettingEdge DNS credentials"
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_log $(printf "ACME DNSAPI Edge DNS version %s" ${ACME_EDGEDNS_VERSION})
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args_missing=0
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if [ -z "${AKAMAI_ACCESS_TOKEN}" ]; then
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AKAMAI_ACCESS_TOKEN=""
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AKAMAI_CLIENT_TOKEN=""
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AKAMAI_HOST=""
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AKAMAI_CLIENT_SECRET=""
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_err "AKAMAI_ACCESS_TOKEN is missing"
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args_missing=1
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fi
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if [ -z "$AKAMAI_CLIENT_TOKEN" ]; then
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AKAMAI_ACCESS_TOKEN=""
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AKAMAI_CLIENT_TOKEN=""
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AKAMAI_HOST=""
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AKAMAI_CLIENT_SECRET=""
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_err "AKAMAI_CLIENT_TOKEN is missing"
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args_missing=1
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fi
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if [ -z "${AKAMAI_HOST}" ]; then
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AKAMAI_ACCESS_TOKEN=""
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AKAMAI_CLIENT_TOKEN=""
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AKAMAI_HOST=""
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AKAMAI_CLIENT_SECRET=""
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_err "AKAMAI_HOST is missing"
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args_missing=1
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fi
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if [ -z "${AKAMAI_CLIENT_SECRET}" ]; then
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AKAMAI_ACCESS_TOKEN=""
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AKAMAI_CLIENT_TOKEN=""
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AKAMAI_HOST=""
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AKAMAI_CLIENT_SECRET=""
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_err "AKAMAI_CLIENT_SECRET is missing"
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args_missing=1
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fi
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if [ "${args_missing}" = 1 ]; then
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_err "You have not properly specified the EdgeDNS Open Edgegrid API credentials. Please try again."
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return 1
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else
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_saveaccountconf_mutable AKAMAI_ACCESS_TOKEN "${AKAMAI_ACCESS_TOKEN}"
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_saveaccountconf_mutable AKAMAI_CLIENT_TOKEN "${AKAMAI_CLIENT_TOKEN}"
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_saveaccountconf_mutable AKAMAI_HOST "${AKAMAI_HOST}"
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_saveaccountconf_mutable AKAMAI_CLIENT_SECRET "${AKAMAI_CLIENT_SECRET}"
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# Set whether curl should use secure or insecure mode
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fi
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export HTTPS_INSECURE=0 # All Edgegrid API calls are secure
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edge_endpoint=$(printf "https://%s/config-dns/v2/zones" "${AKAMAI_HOST}")
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_debug3 "Edge API Endpoint:" "${edge_endpoint}"
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}
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_EDGEDNS_getZoneInfo() {
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_debug "Getting Zoneinfo"
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zoneEnd=false
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curZone=$1
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while [ -n "${zoneEnd}" ]; do
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# we can strip the first part of the fulldomain, since its just the _acme-challenge string
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curZone="${curZone#*.}"
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# suffix . needed for zone -> domain.tld.
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# create zone get url
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get_zone_url=$(printf "%s/%s" "${edge_endpoint}" "${curZone}")
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_debug3 "Zone Get: " "${get_zone_url}"
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curResult=$(_edgedns_rest GET "$get_zone_url")
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retVal=$?
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if [ $retVal -ne 0 ]; then
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if ["$curResult" != "404" ]; then
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_err "$(printf "Managed zone validation failed. Error response: %s" "$retVal")"
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return 1
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fi
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fi
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if _contains "${curResult}" "\"zone\":" ; then
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_debug2 "Zone data" "${curResult}"
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zone=$(echo -n "${curResult}" | _egrep_o "\"zone\"\\s*:\\s*\"[^\"]*\"" | _head_n 1 | cut -d : -f 2 | tr -d "\"")
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_debug2 "Zone" "${zone}"
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zoneFound=""
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zoneEnd=""
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return 0
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fi
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if [ "${curZone#*.}" != "$curZone" ]; then
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_debug2 $(printf "%s still contains a '.' - so we can check next higher level" "$curZone")
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else
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zoneEnd=true
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_err "Couldn't retrieve zone data."
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return 1
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fi
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done
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_err "Failed to retrieve zone data."
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return 2
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}
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_edgedns_headers=""
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_edgedns_rest() {
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_debug "Handling API Request"
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m=$1
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# Assume endpoint is complete path, including query args if applicable
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ep=$2
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body_data=$3
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_edgedns_content_type=""
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_request_url_path="$ep"
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_request_body="$body_data"
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_request_method="$m"
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_edgedns_headers=""
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tab=""
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_edgedns_headers="${_edgedns_headers}${tab}Host: ${AKAMAI_HOST}"
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tab="\t"
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# Set in acme.sh _post/_get
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#_edgedns_headers="${_edgedns_headers}${tab}User-Agent:ACME DNSAPI Edge DNS version ${ACME_EDGEDNS_VERSION}"
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_edgedns_headers="${_edgedns_headers}${tab}Accept: application/json"
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if [ "$m" != "GET" ] && [ "$m" != "DELETE" ] ; then
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_edgedns_content_type="application/json;charset=UTF-8"
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_utf8_body_data="$(echo -n "$ _request_body" | iconv -t utf-8)"
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_utf8_body_len="$(echo -n "$_utf8_body_data" | awk '{print length}')"
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_edgedns_headers="${_edgedns_headers}${tab}Content-Length: ${_utf8_body_len}"
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fi
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_made_auth_header=$(_edgedns_make_auth_header)
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_edgedns_headers="${_edgedns_headers}${tab}Authorization: ${_made_auth_header}"
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_secure_debug2 "Made Auth Header" "${_made_auth_header}"
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hdr_indx=1
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work_header="${_edgedns_headers}${tab}"
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_debug3 "work_header" "${work_header}"
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while [ "${work_header}" ]; do
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entry="${work_header%%\\t*}"; work_header="${work_header#*\\t}"
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export "$(printf "_H%s=%s" "${hdr_indx}" "${entry}")"
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_debug2 "Request Header " "${entry}"
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hdr_indx=$(( hdr_indx + 1 ))
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done
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# clear headers from previous request to avoid getting wrong http code on timeouts
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:>"$HTTP_HEADER"
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_debug "$ep"
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if [ "$m" != "GET" ]; then
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_debug "Method data" "$data"
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# body url [needbase64] [POST|PUT|DELETE] [ContentType]
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response="$(_post "$_utf8_body_data" "$ep" false "$m")"
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else
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response="$(_get "$ep")"
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fi
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_ret="$?"
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_debug "response" "$response"
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_code="$(grep "^HTTP" "$HTTP_HEADER" | _tail_n 1 | cut -d " " -f 2 | tr -d "\\r\\n")"
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_debug2 "http response code" "$_code"
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if [ "$_code" = "200" ] || [ "$_code" = "201" ]; then
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# All good
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response="$(echo "$response" | _normalizeJson)"
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echo -n "${response}"
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return 0
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fi
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if [ "$_code" = "204" ]; then
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# Success, no body
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echo -n ""
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return 0
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fi
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if [ "$_code" = "400" ]; then
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_err "Bad request presented"
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_log "$(printf "Headers: %s" "$_edgedns_headers")"
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_log "$(printf "Method: %s" "$_request_method")"
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_log "$(printf "URL: %s" "$ep")"
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_log "$(printf "Data: %s" "$data")"
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fi
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if [ "$_code" = "403" ]; then
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_err "access denied make sure your Edgegrid cedentials are correct."
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fi
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echo "$_code"
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return 1
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}
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_edgedns_eg_timestamp() {
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_eg_timestamp=$(date -u "+%Y%m%dT%H:%M:%S+0000")
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}
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_edgedns_new_nonce() {
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_nonce=$(uuidgen -r)
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}
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_edgedns_make_auth_header() {
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_debug "Constructing Auth Header"
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_edgedns_eg_timestamp
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_edgedns_new_nonce
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# "Unsigned authorization header: 'EG1-HMAC-SHA256 client_token=block;access_token=block;timestamp=20200806T14:16:33+0000;nonce=72cde72c-82d9-4721-9854-2ba057929d67;'"
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_auth_header="$(printf "EG1-HMAC-SHA256 client_token=%s;access_token=%s;timestamp=%s;nonce=%s;" "${AKAMAI_CLIENT_TOKEN}" "${AKAMAI_ACCESS_TOKEN}" "${_eg_timestamp}" "${_nonce}")"
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_secure_debug2 "Unsigned Auth Header: " "$_auth_header"
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_sig="$(_edgedns_sign_request)"
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_signed_auth_header="$(printf "%ssignature=%s" "${_auth_header}" "${_sig}")"
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_secure_debug2 "Signed Auth Header: " "${_signed_auth_header}"
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echo -n "${_signed_auth_header}"
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}
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_edgedns_sign_request() {
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_debug2 "Signing http request"
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_signed_data=$(_edgedns_make_data_to_sign "${_auth_header}")
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_secure_debug2 "Returned signed data" "$_signed_data"
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_key=$(_edgedns_make_signing_key "${_eg_timestamp}")
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_signed_req=$(_edgedns_base64_hmac_sha256 "$_signed_data" "$_key")
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_secure_debug2 "Signed Request" "${_signed_req}"
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echo -n "${_signed_req}"
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}
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_edgedns_make_signing_key() {
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_debug2 "Creating sigining key"
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ts=$1
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_signing_key=$(_edgedns_base64_hmac_sha256 "$ts" "${AKAMAI_CLIENT_SECRET}")
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_secure_debug2 "Signing Key" "${_signing_key}"
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echo -n "${_signing_key}"
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}
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_edgedns_make_data_to_sign() {
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_debug2 "Processing data to sign"
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hdr=$1
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_secure_debug2 "hdr" "$hdr"
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content_hash=$(_edgedns_make_content_hash)
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path="$(echo -n "${_request_url_path}" |sed 's/https\?:\/\///')"
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path="${path#*$AKAMAI_HOST}"
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_debug "hier path" "${path}"
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# dont expose headers to sign so use MT string
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data="$(printf "%s\thttps\t%s\t%s\t%s\t%s\t%s" "${_request_method}" "${AKAMAI_HOST}" "${path}" "" "${content_hash}" "$hdr")"
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_secure_debug2 "Data to Sign" "${data}"
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echo -n "${data}"
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}
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_edgedns_make_content_hash() {
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_debug2 "Generating content hash"
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prep_body=""
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_hash=""
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_debug2 "Request method" "${_request_method}"
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if [ "${_request_method}" != "POST" ] || [ -z "${_request_body}" ]; then
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echo -n "${prep_body}"
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return 0
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fi
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prep_body="$(echo -n "${_request_body}")"
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_debug2 "Req body" "${prep_body}"
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_hash=$(_edgedns_base64_sha256 "${prep_body}")
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_debug2 "Content hash" "${_hash}"
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echo -n "${_hash}"
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}
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_edgedns_base64_hmac_sha256() {
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_debug2 "Generating hmac"
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data=$1
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key=$2
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encoded_data="$(echo -n "${data}" | iconv -t utf-8)"
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encoded_key="$(echo -n "${key}" | iconv -t utf-8)"
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_secure_debug2 "encoded data" "${encoded_data}"
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_secure_debug2 "encoded key" "${encoded_key}"
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#key_hex="$(_durl_replace_base64 "$key" | _dbase64 | _hex_dump | tr -d ' ')"
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#data_sig="$(printf "%s" "$encoded_data" | _hmac sha256 "${key_hex}" | _base64 | _url_replace)"
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data_sig="$(echo -n "$encoded_data" | ${ACME_OPENSSL_BIN:-openssl} dgst -sha256 -hmac $encoded_key -binary | _base64)"
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_secure_debug2 "data_sig:" "${data_sig}"
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out="$(echo -n "${data_sig}" | iconv -f utf-8)"
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_secure_debug2 "hmac" "${out}"
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echo -n "${out}"
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}
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_edgedns_base64_sha256() {
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_debug2 "Creating sha256 digest"
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trg=$1
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utf8_str="$(echo -n "${trg}" | iconv -t utf-8)"
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_secure_debug2 "digest data" "$trg"
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_secure_debug2 "encoded digest data" "${utf8_str}"
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digest="$(echo -n "${trg}" | ${ACME_OPENSSL_BIN:-openssl} dgst -sha256 -binary | _base64)"
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out="$(echo -n "${digest}" | iconv -f utf-8)"
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_secure_debug2 "digest decode" "${out}"
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echo -n "${out}"
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}
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#_edgedns_parse_edgerc() {
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# filepath=$1
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# section=$2
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#}
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