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321 lines
10 KiB
321 lines
10 KiB
#!/usr/bin/env sh
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#
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#AWS_ACCESS_KEY_ID="sdfsdfsdfljlbjkljlkjsdfoiwje"
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#
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#AWS_SECRET_ACCESS_KEY="xxxxxxx"
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#This is the Amazon Route53 api wrapper for acme.sh
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AWS_HOST="route53.amazonaws.com"
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AWS_URL="https://$AWS_HOST"
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AWS_METADATA_URL="http://169.254.169.254/latest/meta-data"
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AWS_WIKI="https://github.com/Neilpang/acme.sh/wiki/How-to-use-Amazon-Route53-API"
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######## Public functions #####################
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#Usage: dns_myapi_add _acme-challenge.www.domain.com "XKrxpRBosdIKFzxW_CT3KLZNf6q0HG9i01zxXp5CPBs"
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dns_aws_add() {
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fulldomain=$1
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txtvalue=$2
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AWS_ACCESS_KEY_ID="${AWS_ACCESS_KEY_ID:-$(_readaccountconf_mutable AWS_ACCESS_KEY_ID)}"
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AWS_SECRET_ACCESS_KEY="${AWS_SECRET_ACCESS_KEY:-$(_readaccountconf_mutable AWS_SECRET_ACCESS_KEY)}"
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if [ -z "$AWS_ACCESS_KEY_ID" ] || [ -z "$AWS_SECRET_ACCESS_KEY" ]; then
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_use_instance_role
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fi
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if [ -z "$AWS_ACCESS_KEY_ID" ] || [ -z "$AWS_SECRET_ACCESS_KEY" ]; then
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AWS_ACCESS_KEY_ID=""
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AWS_SECRET_ACCESS_KEY=""
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_err "You don't specify aws route53 api key id and and api key secret yet."
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_err "Please create your key and try again. see $(__green $AWS_WIKI)"
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return 1
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fi
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#save for future use, unless using a role which will be fetched as needed
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if [ -z "$_using_instance_role" ]; then
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_saveaccountconf_mutable AWS_ACCESS_KEY_ID "$AWS_ACCESS_KEY_ID"
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_saveaccountconf_mutable AWS_SECRET_ACCESS_KEY "$AWS_SECRET_ACCESS_KEY"
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fi
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_debug "First detect the root zone"
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if ! _get_root "$fulldomain"; then
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_err "invalid domain"
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return 1
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fi
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_debug _domain_id "$_domain_id"
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_debug _sub_domain "$_sub_domain"
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_debug _domain "$_domain"
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_info "Geting existing records for $fulldomain"
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if ! aws_rest GET "2013-04-01$_domain_id/rrset" "name=$fulldomain&type=TXT"; then
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return 1
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fi
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if _contains "$response" "<Name>$fulldomain.</Name>"; then
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_resource_record="$(echo "$response" | sed 's/<ResourceRecordSet>/"/g' | tr '"' "\n" | grep "<Name>$fulldomain.</Name>" | _egrep_o "<ResourceRecords.*</ResourceRecords>" | sed "s/<ResourceRecords>//" | sed "s#</ResourceRecords>##")"
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_debug "_resource_record" "$_resource_record"
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else
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_debug "single new add"
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fi
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if [ "$_resource_record" ] && _contains "$response" "$txtvalue"; then
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_info "The txt record already exists, skip"
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return 0
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fi
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_debug "Adding records"
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_aws_tmpl_xml="<ChangeResourceRecordSetsRequest xmlns=\"https://route53.amazonaws.com/doc/2013-04-01/\"><ChangeBatch><Changes><Change><Action>UPSERT</Action><ResourceRecordSet><Name>$fulldomain</Name><Type>TXT</Type><TTL>300</TTL><ResourceRecords>$_resource_record<ResourceRecord><Value>\"$txtvalue\"</Value></ResourceRecord></ResourceRecords></ResourceRecordSet></Change></Changes></ChangeBatch></ChangeResourceRecordSetsRequest>"
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if aws_rest POST "2013-04-01$_domain_id/rrset/" "" "$_aws_tmpl_xml" && _contains "$response" "ChangeResourceRecordSetsResponse"; then
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_info "txt record updated success."
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return 0
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fi
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return 1
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}
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#fulldomain txtvalue
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dns_aws_rm() {
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fulldomain=$1
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txtvalue=$2
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AWS_ACCESS_KEY_ID="${AWS_ACCESS_KEY_ID:-$(_readaccountconf_mutable AWS_ACCESS_KEY_ID)}"
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AWS_SECRET_ACCESS_KEY="${AWS_SECRET_ACCESS_KEY:-$(_readaccountconf_mutable AWS_SECRET_ACCESS_KEY)}"
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if [ -z "$AWS_ACCESS_KEY_ID" ] || [ -z "$AWS_SECRET_ACCESS_KEY" ]; then
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_use_instance_role
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fi
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_debug "First detect the root zone"
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if ! _get_root "$fulldomain"; 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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_info "Geting existing records for $fulldomain"
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if ! aws_rest GET "2013-04-01$_domain_id/rrset" "name=$fulldomain&type=TXT"; then
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return 1
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fi
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if _contains "$response" "<Name>$fulldomain.</Name>"; then
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_resource_record="$(echo "$response" | sed 's/<ResourceRecordSet>/"/g' | tr '"' "\n" | grep "<Name>$fulldomain.</Name>" | _egrep_o "<ResourceRecords.*</ResourceRecords>" | sed "s/<ResourceRecords>//" | sed "s#</ResourceRecords>##")"
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_debug "_resource_record" "$_resource_record"
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else
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_debug "no records exists, skip"
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return 0
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fi
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_aws_tmpl_xml="<ChangeResourceRecordSetsRequest xmlns=\"https://route53.amazonaws.com/doc/2013-04-01/\"><ChangeBatch><Changes><Change><Action>DELETE</Action><ResourceRecordSet><ResourceRecords>$_resource_record</ResourceRecords><Name>$fulldomain.</Name><Type>TXT</Type><TTL>300</TTL></ResourceRecordSet></Change></Changes></ChangeBatch></ChangeResourceRecordSetsRequest>"
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if aws_rest POST "2013-04-01$_domain_id/rrset/" "" "$_aws_tmpl_xml" && _contains "$response" "ChangeResourceRecordSetsResponse"; then
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_info "txt record deleted success."
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return 0
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fi
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return 1
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}
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#################### Private functions below ##################################
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_get_root() {
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domain=$1
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i=2
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p=1
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if aws_rest GET "2013-04-01/hostedzone"; then
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while true; do
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h=$(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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if _contains "$response" "<IsTruncated>true</IsTruncated>" && _contains "$response" "<NextMarker>"; then
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_debug "IsTruncated"
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_nextMarker="$(echo "$response" | _egrep_o "<NextMarker>.*</NextMarker>" | cut -d '>' -f 2 | cut -d '<' -f 1)"
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_debug "NextMarker" "$_nextMarker"
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if aws_rest GET "2013-04-01/hostedzone" "marker=$_nextMarker"; then
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_debug "Truncated request OK"
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i=2
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p=1
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continue
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else
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_err "Truncated request error."
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fi
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fi
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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.</Name>"; then
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hostedzone="$(echo "$response" | sed 's/<HostedZone>/#&/g' | tr '#' '\n' | _egrep_o "<HostedZone><Id>[^<]*<.Id><Name>$h.<.Name>.*<PrivateZone>false<.PrivateZone>.*<.HostedZone>")"
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_debug hostedzone "$hostedzone"
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if [ "$hostedzone" ]; then
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_domain_id=$(printf "%s\n" "$hostedzone" | _egrep_o "<Id>.*<.Id>" | head -n 1 | _egrep_o ">.*<" | tr -d "<>")
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if [ "$_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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_err "Can not find domain id: $h"
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return 1
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fi
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fi
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p=$i
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i=$(_math "$i" + 1)
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done
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fi
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return 1
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}
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_use_instance_role() {
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if ! _get "$AWS_METADATA_URL/iam/security-credentials/" true 1 | _head_n 1 | grep -Fq 200; then
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_err "Unable to fetch IAM role from AWS instance metadata."
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return
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fi
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_aws_role=$(_get "$AWS_METADATA_URL/iam/security-credentials/" "" 1)
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_debug "_aws_role" "$_aws_role"
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_aws_creds="$(
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_get "$AWS_METADATA_URL/iam/security-credentials/$_aws_role" "" 1 \
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| _normalizeJson \
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| tr '{,}' '\n' \
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| while read -r _line; do
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_key="$(echo "${_line%%:*}" | tr -d '"')"
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_value="${_line#*:}"
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_debug3 "_key" "$_key"
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_secure_debug3 "_value" "$_value"
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case "$_key" in
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AccessKeyId) echo "AWS_ACCESS_KEY_ID=$_value" ;;
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SecretAccessKey) echo "AWS_SECRET_ACCESS_KEY=$_value" ;;
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Token) echo "AWS_SESSION_TOKEN=$_value" ;;
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esac
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done \
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| paste -sd' ' -
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)"
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_secure_debug "_aws_creds" "$_aws_creds"
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eval "$_aws_creds"
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_using_instance_role=true
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}
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#method uri qstr data
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aws_rest() {
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mtd="$1"
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ep="$2"
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qsr="$3"
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data="$4"
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_debug mtd "$mtd"
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_debug ep "$ep"
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_debug qsr "$qsr"
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_debug data "$data"
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CanonicalURI="/$ep"
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_debug2 CanonicalURI "$CanonicalURI"
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CanonicalQueryString="$qsr"
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_debug2 CanonicalQueryString "$CanonicalQueryString"
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RequestDate="$(date -u +"%Y%m%dT%H%M%SZ")"
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_debug2 RequestDate "$RequestDate"
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#RequestDate="20161120T141056Z" ##############
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export _H1="x-amz-date: $RequestDate"
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aws_host="$AWS_HOST"
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CanonicalHeaders="host:$aws_host\nx-amz-date:$RequestDate\n"
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SignedHeaders="host;x-amz-date"
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if [ -n "$AWS_SESSION_TOKEN" ]; then
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export _H3="x-amz-security-token: $AWS_SESSION_TOKEN"
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CanonicalHeaders="${CanonicalHeaders}x-amz-security-token:$AWS_SESSION_TOKEN\n"
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SignedHeaders="${SignedHeaders};x-amz-security-token"
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fi
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_debug2 CanonicalHeaders "$CanonicalHeaders"
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_debug2 SignedHeaders "$SignedHeaders"
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RequestPayload="$data"
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_debug2 RequestPayload "$RequestPayload"
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Hash="sha256"
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CanonicalRequest="$mtd\n$CanonicalURI\n$CanonicalQueryString\n$CanonicalHeaders\n$SignedHeaders\n$(printf "%s" "$RequestPayload" | _digest "$Hash" hex)"
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_debug2 CanonicalRequest "$CanonicalRequest"
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HashedCanonicalRequest="$(printf "$CanonicalRequest%s" | _digest "$Hash" hex)"
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_debug2 HashedCanonicalRequest "$HashedCanonicalRequest"
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Algorithm="AWS4-HMAC-SHA256"
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_debug2 Algorithm "$Algorithm"
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RequestDateOnly="$(echo "$RequestDate" | cut -c 1-8)"
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_debug2 RequestDateOnly "$RequestDateOnly"
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Region="us-east-1"
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Service="route53"
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CredentialScope="$RequestDateOnly/$Region/$Service/aws4_request"
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_debug2 CredentialScope "$CredentialScope"
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StringToSign="$Algorithm\n$RequestDate\n$CredentialScope\n$HashedCanonicalRequest"
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_debug2 StringToSign "$StringToSign"
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kSecret="AWS4$AWS_SECRET_ACCESS_KEY"
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#kSecret="wJalrXUtnFEMI/K7MDENG+bPxRfiCYEXAMPLEKEY" ############################
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_secure_debug2 kSecret "$kSecret"
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kSecretH="$(printf "%s" "$kSecret" | _hex_dump | tr -d " ")"
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_secure_debug2 kSecretH "$kSecretH"
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kDateH="$(printf "$RequestDateOnly%s" | _hmac "$Hash" "$kSecretH" hex)"
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_debug2 kDateH "$kDateH"
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kRegionH="$(printf "$Region%s" | _hmac "$Hash" "$kDateH" hex)"
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_debug2 kRegionH "$kRegionH"
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kServiceH="$(printf "$Service%s" | _hmac "$Hash" "$kRegionH" hex)"
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_debug2 kServiceH "$kServiceH"
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kSigningH="$(printf "%s" "aws4_request" | _hmac "$Hash" "$kServiceH" hex)"
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_debug2 kSigningH "$kSigningH"
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signature="$(printf "$StringToSign%s" | _hmac "$Hash" "$kSigningH" hex)"
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_debug2 signature "$signature"
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Authorization="$Algorithm Credential=$AWS_ACCESS_KEY_ID/$CredentialScope, SignedHeaders=$SignedHeaders, Signature=$signature"
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_debug2 Authorization "$Authorization"
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_H2="Authorization: $Authorization"
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_debug _H2 "$_H2"
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url="$AWS_URL/$ep"
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if [ "$qsr" ]; then
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url="$AWS_URL/$ep?$qsr"
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fi
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if [ "$mtd" = "GET" ]; then
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response="$(_get "$url")"
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else
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response="$(_post "$data" "$url")"
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fi
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_ret="$?"
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_debug2 response "$response"
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if [ "$_ret" = "0" ]; then
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if _contains "$response" "<ErrorResponse"; then
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_err "Response error:$response"
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return 1
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fi
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fi
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return "$_ret"
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}
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