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