From e90f3b84c1a1694f7f5c13a3ebfabc2da246a78d Mon Sep 17 00:00:00 2001 From: martgras Date: Tue, 23 Jan 2018 18:24:08 +0100 Subject: [PATCH] Add support for Azure DNS Adding support for Azure DNS See https://docs.microsoft.com/en-us/azure/dns/ --- dnsapi/dns_azure.sh | 241 ++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 241 insertions(+) create mode 100644 dnsapi/dns_azure.sh diff --git a/dnsapi/dns_azure.sh b/dnsapi/dns_azure.sh new file mode 100644 index 00000000..40997740 --- /dev/null +++ b/dnsapi/dns_azure.sh @@ -0,0 +1,241 @@ +#!/usr/bin/env sh + + +######## Public functions ##################### + + # Usage: add _acme-challenge.www.domain.com "XKrxpRBosdIKFzxW_CT3KLZNf6q0HG9i01zxXp5CPBs" +# Used to add txt record +# +# Ref: https://docs.microsoft.com/en-us/rest/api/dns/recordsets/createorupdate +# +dns_azure_add() +{ + fulldomain=$1 + txtvalue=$2 + + AZUREDNS_SUBSCRIPTIONID="${AZUREDNS_SUBSCRIPTIONID:-$(_readaccountconf_mutable AZUREDNS_SUBSCRIPTIONID)}" + AZUREDNS_TENANTID="${AZUREDNS_TENANTID:-$(_readaccountconf_mutable AZUREDNS_TENANTID)}" + AZUREDNS_APPID="${AZUREDNS_APPID:-$(_readaccountconf_mutable AZUREDNS_APPID)}" + AZUREDNS_CLIENTSECRET="${AZUREDNS_CLIENTSECRET:-$(_readaccountconf_mutable AZUREDNS_CLIENTSECRET)}" + + if [ -z "$AZUREDNS_SUBSCRIPTIONID" ]; then + AZUREDNS_SUBSCRIPTIONID="" + AZUREDNS_TENANTID="" + AZUREDNS_APPID="" + AZUREDNS_CLIENTSECRET="" + _err "You didn't specify the Azure Subscription ID " + return 1 + fi + + if [ -z "$AZUREDNS_TENANTID" ] ; then + AZUREDNS_SUBSCRIPTIONID="" + AZUREDNS_TENANTID="" + AZUREDNS_APPID="" + AZUREDNS_CLIENTSECRET="" + _err "You didn't specify then Azure Tenant ID " + return 1 + fi + + if [ -z "$AZUREDNS_APPID" ] ; then + AZUREDNS_SUBSCRIPTIONID="" + AZUREDNS_TENANTID="" + AZUREDNS_APPID="" + AZUREDNS_CLIENTSECRET="" + _err "You didn't specify the Azure App ID" + return 1 + fi + + if [ -z "$AZUREDNS_CLIENTSECRET" ]; then + AZUREDNS_SUBSCRIPTIONID="" + AZUREDNS_TENANTID="" + AZUREDNS_APPID="" + AZUREDNS_CLIENTSECRET="" + _err "You didn't specify the Azure Client Secret" + return 1 + fi + #save account details to account conf file. + _saveaccountconf_mutable AZUREDNS_SUBSCRIPTIONID "$AZUREDNS_SUBSCRIPTIONID" + _saveaccountconf_mutable AZUREDNS_TENANTID "$AZUREDNS_TENANTID" + _saveaccountconf_mutable AZUREDNS_APPID "$AZUREDNS_APPID" + _saveaccountconf_mutable AZUREDNS_CLIENTSECRET "$AZUREDNS_CLIENTSECRET" + + + accesstoken=$(_azure_getaccess_token "$AZUREDNS_TENANTID" "$AZUREDNS_APPID" "$AZUREDNS_CLIENTSECRET") + + if ! _get_root "$fulldomain" "$AZUREDNS_SUBSCRIPTIONID" "$accesstoken"; then + _err "invalid domain" + return 1 + fi + _debug _domain_id "$_domain_id" + _debug _sub_domain "$_sub_domain" + _debug _domain "$_domain" + + acmeRecordURI="https://management.azure.com$(printf '%s' $_domain_id |sed 's/\\//g')/TXT/$_sub_domain?api-version=2017-09-01" + _debug $acmeRecordURI + body="{\"properties\": {\"TTL\": 3600, \"TXTRecords\": [{\"value\": [\"$txtvalue\"]}]}}" + _azure_rest PUT "$acmeRecordURI" "$body" "$accesstoken" + _debug $response +} + +# Usage: fulldomain txtvalue +# Used to remove the txt record after validation +# +# Ref: https://docs.microsoft.com/en-us/rest/api/dns/recordsets/delete +# +dns_azure_rm() +{ + fulldomain=$1 + txtvalue=$2 + + AZUREDNS_SUBSCRIPTIONID="${AZUREDNS_SUBSCRIPTIONID:-$(_readaccountconf_mutable AZUREDNS_SUBSCRIPTIONID)}" + AZUREDNS_TENANTID="${AZUREDNS_TENANTID:-$(_readaccountconf_mutable AZUREDNS_TENANTID)}" + AZUREDNS_APPID="${AZUREDNS_APPID:-$(_readaccountconf_mutable AZUREDNS_APPID)}" + AZUREDNS_CLIENTSECRET="${AZUREDNS_CLIENTSECRET:-$(_readaccountconf_mutable AZUREDNS_CLIENTSECRET)}" + + if [ -z "$AZUREDNS_SUBSCRIPTIONID" ]; then + AZUREDNS_SUBSCRIPTIONID="" + AZUREDNS_TENANTID="" + AZUREDNS_APPID="" + AZUREDNS_CLIENTSECRET="" + _err "You didn't specify the Azure Subscription ID " + return 1 + fi + + if [ -z "$AZUREDNS_TENANTID" ] ; then + AZUREDNS_SUBSCRIPTIONID="" + AZUREDNS_TENANTID="" + AZUREDNS_APPID="" + AZUREDNS_CLIENTSECRET="" + _err "You didn't specify the Azure Tenant ID " + return 1 + fi + + if [ -z "$AZUREDNS_APPID" ] ;then + AZUREDNS_SUBSCRIPTIONID="" + AZUREDNS_TENANTID="" + AZUREDNS_APPID="" + AZUREDNS_CLIENTSECRET="" + _err "You didn't specify the Azure App ID" + return 1 + fi + + if [ -z "$AZUREDNS_CLIENTSECRET" ]; then + AZUREDNS_SUBSCRIPTIONID="" + AZUREDNS_TENANTID="" + AZUREDNS_APPID="" + AZUREDNS_CLIENTSECRET="" + _err "You didn't specify Azure Client Secret" + return 1 + fi + + accesstoken=$(_azure_getaccess_token "$AZUREDNS_TENANTID" "$AZUREDNS_APPID" "$AZUREDNS_CLIENTSECRET") + + if ! _get_root "$fulldomain" "$AZUREDNS_SUBSCRIPTIONID" "$accesstoken"; then + _err "invalid domain" + return 1 + fi + _debug _domain_id "$_domain_id" + _debug _sub_domain "$_sub_domain" + _debug _domain "$_domain" + + acmeRecordURI="https://management.azure.com$(printf '%s' $_domain_id |sed 's/\\//g')/TXT/$_sub_domain?api-version=2017-09-01" + _debug $acmeRecordURI + body="{\"properties\": {\"TTL\": 3600, \"TXTRecords\": [{\"value\": [\"$txtvalue\"]}]}}" + _azure_rest DELETE "$acmeRecordURI" "" "$accesstoken" + _debug $response +} + +################### Private functions below ################################## + +_azure_rest() { + m=$1 + ep="$2" + data="$3" + accesstoken="$4" + + _debug "$ep" + + export _H1="authorization: Bearer $accesstoken" + export _H2="accept: application/json" + export _H3="Content-Type: application/json" + _H1="authorization: Bearer $accesstoken" + _H2="accept: application/json" + _H3="Content-Type: application/json" + + if [ "$m" != "GET" ]; then + _debug data "$data" + response="$(_post "$data" "$ep" "" "$m")" + else + response="$(_get "$ep")" + fi + _debug2 response "$response" + if [ "$?" != "0" ]; then + _err "error $ep" + return 1 + fi + return 0 +} + +## Ref: https://docs.microsoft.com/en-us/azure/active-directory/develop/active-directory-protocols-oauth-service-to-service#request-an-access-token +_azure_getaccess_token() { + TENANTID=$1 + clientID=$2 + clientSecret=$3 + + export _H1="accept: application/json" + export _H2="Content-Type: application/x-www-form-urlencoded" + export _H3="" + + body="resource=$(printf "%s" 'https://management.core.windows.net/'| _url_encode)&client_id=$(printf "%s" $clientID | _url_encode)&client_secret=$(printf "%s" $clientSecret| _url_encode)&grant_type=client_credentials" + _debug data "$body" + response="$(_post "$body" "https://login.windows.net/$TENANTID/oauth2/token" "" "POST" )" + accesstoken=$(printf "%s\n" "$response" | _egrep_o "\"access_token\":\"[^\"]*\"" | head -n 1 | cut -d : -f 2 | tr -d \") + + if [ "$?" != "0" ]; then + _err "error $response" + return 1 + fi + printf $accesstoken + _debug2 response "$response" + return 0 +} + +_get_root() { + domain=$1 + subscriptionId=$2 + accesstoken=$3 + i=2 + p=1 + + ## Ref: https://docs.microsoft.com/en-us/rest/api/dns/zones/list + ## returns up to 100 zones in one response therefore handling more results is not not implemented + ## (ZoneListResult with continuation token for the next page of results) + ## Per https://docs.microsoft.com/en-us/azure/azure-subscription-service-limits#dns-limits you are limited to 100 Zone/subscriptions anyways + ## + _azure_rest GET "https://management.azure.com/subscriptions/$subscriptionId/providers/Microsoft.Network/dnszones?api-version=2017-09-01" "" $accesstoken + + # Find matching domain name is Json response + while true; do + h=$(printf "%s" "$domain" | cut -d . -f $i-100) + _debug2 "Checking domain: $h" + if [ -z "$h" ]; then + #not valid + _err "Invalid domain" + return 1 + fi + + if _contains "$response" "\"name\":\"$h\"" >/dev/null; then + _domain_id=$(printf "%s\n" "$response" | _egrep_o "\[.\"id\":\"[^\"]*\"" | head -n 1 | cut -d : -f 2 | tr -d \") + if [ "$_domain_id" ]; then + _sub_domain=$(printf "%s" "$domain" | cut -d . -f 1-$p) + _domain=$h + return 0 + fi + return 1 + fi + p=$i + i=$(_math "$i" + 1) + done + return 1 +} +