acme.sh/dnsapi/dns_mythic_beasts.sh

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#!/usr/bin/env sh
# Mythic Beasts is a long-standing UK service provider using standards-based OAuth2 authentication
# To test: ./acme.sh --dns dns_mythic_beasts --test --debug 1 --output-insecure --issue --domain domain.com
# Cannot retest once cert is issued
# OAuth2 tokens only valid for 300 seconds so we do not store
# NOTE: This will remove all TXT records matching the fulldomain, not just the added ones (_acme-challenge.www.domain.com)
# Test OAuth2 credentials
#MB_AK="aaaaaaaaaaaaaaaa"
#MB_AS="bbbbbbbbbbbbbbbbbbbbbbbbbbbbbb"
# URLs
MB_API='https://api.mythic-beasts.com/dns/v2/zones'
MB_AUTH='https://auth.mythic-beasts.com/login'
######## Public functions #####################
#Usage: add _acme-challenge.www.domain.com "XKrxpRBosdIKFzxW_CT3KLZNf6q0HG9i01zxXp5CPBs"
dns_mythic_beasts_add() {
fulldomain=$1
txtvalue=$2
_info "MYTHIC BEASTS Adding record $fulldomain = $txtvalue"
if ! _initAuth; then
return 1
fi
if ! _get_root "$fulldomain"; then
return 1
fi
# method path body_data
if _mb_rest POST "$_domain/records/$_sub_domain/TXT" "$txtvalue"; then
if _contains "$response" "1 records added"; then
_info "Added, verifying..."
# Max 120 seconds to publish
for i in $(seq 1 6); do
# Retry on error
if ! _mb_rest GET "$_domain/records/$_sub_domain/TXT?verify"; then
_sleep 20
else
_info "Record published!"
return 0
fi
done
else
_err "\n$response"
fi
fi
_err "Add txt record error."
return 1
}
#Usage: rm _acme-challenge.www.domain.com "XKrxpRBosdIKFzxW_CT3KLZNf6q0HG9i01zxXp5CPBs"
dns_mythic_beasts_rm() {
fulldomain=$1
txtvalue=$2
_info "MYTHIC BEASTS Removing record $fulldomain = $txtvalue"
if ! _initAuth; then
return 1
fi
if ! _get_root "$fulldomain"; then
return 1
fi
# method path body_data
if _mb_rest DELETE "$_domain/records/$_sub_domain/TXT" "$txtvalue"; then
_info "Record removed"
return 0
fi
_err "Remove txt record error."
return 1
}
#################### Private functions below ##################################
#Possible formats:
# _acme-challenge.www.example.com
# _acme-challenge.example.com
# _acme-challenge.example.co.uk
# _acme-challenge.www.example.co.uk
# _acme-challenge.sub1.sub2.www.example.co.uk
# sub1.sub2.example.co.uk
# example.com
# example.co.uk
#returns
# _sub_domain=_acme-challenge.www
# _domain=domain.com
_get_root() {
domain=$1
i=1
p=1
_debug "Detect the root zone"
while true; do
h=$(printf "%s" "$domain" | cut -d . -f $i-100)
if [ -z "$h" ]; then
_err "Domain exhausted"
return 1
fi
# Use the status errors to find the domain, continue on 403 Access denied
# method path body_data
_mb_rest GET "$h/records"
ret="$?"
if [ "$ret" -eq 0 ]; then
_sub_domain=$(printf "%s" "$domain" | cut -d . -f 1-$p)
_domain="$h"
_debug _sub_domain "$_sub_domain"
_debug _domain "$_domain"
return 0
elif [ "$ret" -eq 1 ]; then
return 1
fi
p=$i
i=$(_math "$i" + 1)
if [ "$i" -gt 50 ]; then
break
fi
done
_err "Domain too long"
return 1
}
_initAuth() {
MB_AK="${MB_AK:-$(_readaccountconf_mutable MB_AK)}"
MB_AS="${MB_AS:-$(_readaccountconf_mutable MB_AS)}"
if [ -z "$MB_AK" ] || [ -z "$MB_AS" ]; then
MB_AK=""
MB_AS=""
_err "Please specify an OAuth2 Key & Secret"
return 1
fi
_saveaccountconf_mutable MB_AK "$MB_AK"
_saveaccountconf_mutable MB_AS "$MB_AS"
if ! _oauth2; then
return 1
fi
_info "Checking authentication"
_secure_debug access_token "$MB_TK"
_sleep 1
# GET a list of zones
# method path body_data
if ! _mb_rest GET ""; then
_err "The token is invalid"
return 1
fi
_info "Token OK"
return 0
}
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# Github appears to use an outbound proxy for requests which means subsequent requests may not have the same
# source IP. The standard Mythic Beasts OAuth2 tokens are tied to an IP, meaning github test requests fail
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# authentication. This is a work around using an undocumented MB API to obtain a token not tied to an
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# IP just for the github tests.
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_oauth2() {
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if [ "$GITHUB_ACTIONS" = "true" ]; then
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_oauth2_github
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else
_oauth2_std
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fi
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return $?
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}
_oauth2_std() {
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# HTTP Basic Authentication
_H1="Authorization: Basic $(echo "$MB_AK:$MB_AS" | _base64)"
_H2="Accepts: application/json"
export _H1 _H2
body="grant_type=client_credentials"
_info "Getting OAuth2 token..."
# body url [needbase64] [POST|PUT|DELETE] [ContentType]
response="$(_post "$body" "$MB_AUTH" "" "POST" "application/x-www-form-urlencoded")"
if _contains "$response" "\"token_type\":\"bearer\""; then
MB_TK="$(echo "$response" | _egrep_o "access_token\":\"[^\"]*\"" | cut -d : -f 2 | tr -d '"')"
if [ -z "$MB_TK" ]; then
_err "Unable to get access_token"
_err "\n$response"
return 1
fi
else
_err "OAuth2 token_type not Bearer"
_err "\n$response"
return 1
fi
_debug2 response "$response"
return 0
}
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_oauth2_github() {
_H1="Accepts: application/json"
export _H1
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body="{\"login\":{\"handle\":\"$MB_AK\",\"pass\":\"$MB_AS\",\"floating\":1}}"
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_info "Getting Floating token..."
# body url [needbase64] [POST|PUT|DELETE] [ContentType]
response="$(_post "$body" "$MB_AUTH" "" "POST" "application/json")"
MB_TK="$(echo "$response" | _egrep_o "\"token\":\"[^\"]*\"" | cut -d : -f 2 | tr -d '"')"
if [ -z "$MB_TK" ]; then
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_err "Unable to get token"
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_err "\n$response"
return 1
fi
_debug2 response "$response"
return 0
}
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# method path body_data
_mb_rest() {
# URL encoded body for single API operations
m="$1"
ep="$2"
data="$3"
if [ -z "$ep" ]; then
_mb_url="$MB_API"
else
_mb_url="$MB_API/$ep"
fi
_H1="Authorization: Bearer $MB_TK"
_H2="Accepts: application/json"
export _H1 _H2
if [ "$data" ] || [ "$m" = "POST" ] || [ "$m" = "PUT" ] || [ "$m" = "DELETE" ]; then
# body url [needbase64] [POST|PUT|DELETE] [ContentType]
response="$(_post "data=$data" "$_mb_url" "" "$m" "application/x-www-form-urlencoded")"
else
response="$(_get "$_mb_url")"
fi
if [ "$?" != "0" ]; then
_err "Request error"
return 1
fi
header="$(cat "$HTTP_HEADER")"
status="$(echo "$header" | _egrep_o "^HTTP[^ ]* .*$" | cut -d " " -f 2-100 | tr -d "\f\n")"
code="$(echo "$status" | _egrep_o "^[0-9]*")"
if [ "$code" -ge 400 ] || _contains "$response" "\"error\"" || _contains "$response" "invalid_client"; then
_err "error $status"
_err "\n$response"
_debug "\n$header"
return 2
fi
_debug2 response "$response"
return 0
}