acme.sh/dnsapi/dns_pleskxml
2019-10-27 01:09:50 +01:00

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#!/usr/bin/env sh
## Name: dns_pleskxml.sh
## Created by Stilez.
## Also uses some code from PR#1832 by @romanlum (https://github.com/Neilpang/acme.sh/pull/1832/files)
## This DNS01 method uses the Plesk XML API described at:
## https://docs.plesk.com/en-US/12.5/api-rpc/about-xml-api.28709
## and more specifically: https://docs.plesk.com/en-US/12.5/api-rpc/reference.28784
## Note: a DNS ID with host = empty string is OK for this API, see
## https://docs.plesk.com/en-US/obsidian/api-rpc/about-xml-api/reference/managing-dns/managing-dns-records/adding-dns-record.34798
## For example, to add a TXT record to DNS alias domain "acme-alias.com" would be a valid Plesk action.
## So this API module can handle such a request, if needed.
## The plesk plugin uses the xml api to add and remvoe the dns records. Therefore the url, username
## and password have to be configured by the user before this module is called.
##
## ```
## export pleskxml_uri="https://YOUR_PLESK_URI_HERE:8443/enterprise/control/agent.php"
## (or probably something similar)
## export pleskxml_user="plesk username"
## export pleskxml_pass="plesk password"
## ```
## Ok, let's issue a cert now:
## ```
## acme.sh --issue --dns dns_pleskxml -d example.com -d www.example.com
## ```
##
## The `pleskxml_uri`, `pleskxml_user` and `pleskxml_pass` will be saved in `~/.acme.sh/account.conf` and reused when needed.
#################### INTERNAL VARIABLES + NEWLINE ##################################
pleskxml_init_checks_done=0
# Variable containing bare newline - not a style issue
# shellcheck disable=SC1004
NEWLINE='\
'
#################### API Templates ##################################
pleskxml_tplt_get_domains="<packet><customer><get-domain-list><filter/></get-domain-list></customer></packet>"
# Get a list of domains that PLESK can manage, so we can check root domain + host for acme.sh
# Also used to test credentials and URI.
# No args.
pleskxml_tplt_get_dns_records="<packet><dns><get_rec><filter><site-id>%s</site-id></filter></get_rec></dns></packet>"
# Get all DNS records for a Plesk domain ID.
# ARG = Plesk domain id to query
pleskxml_tplt_add_txt_record="<packet><dns><add_rec><site-id>%s</site-id><type>TXT</type><host>%s</host><value>%s</value></add_rec></dns></packet>"
# Add a TXT record to a domain.
# ARGS = (1) Plesk internal domain ID, (2) "hostname" for the new record, eg '_acme_challenge', (3) TXT record value
pleskxml_tplt_rmv_dns_record="<packet><dns><del_rec><filter><id>%s</id></filter></del_rec></dns></packet>"
# Add a TXT record to a domain.
# ARG = the Plesk internal ID for the dns record to be deleted
#################### Public functions ##################################
#Usage: add _acme-challenge.www.domain.com "XKrxpRBosdIKFzxW_CT3KLZNf6q0HG9i01zxXp5CPBs"
dns_pleskxml_add() {
fulldomain=$1
txtvalue=$2
_info "Entering dns_pleskxml_add() to add TXT record '$2' to domain '$1'..."
# Get credentials if not already checked, and confirm we can log in to Plesk XML API
if ! _credential_check; then
return 1
fi
# Get root and subdomain details, and Plesk domain ID
if ! _pleskxml_get_root_domain "$fulldomain"; then
return 1
fi
_debug 'Credentials OK, and domain identified. Calling Plesk XML API to add TXT record'
# printf using template in a variable - not a style issue
# shellcheck disable=SC2059
request="$( printf "$pleskxml_tplt_add_txt_record" "$root_domain_id" "$sub_domain_name" "$txtvalue" )"
if ! _call_api "$request"; then
return 1
fi
# OK, we should have added a TXT record. Let's check and return success if so.
# All that should be left in the result, is one section, containing <result><status>ok</status><id>NEW_DNS_RECORD_ID</id></result>
results="$( _api_response_split "$pleskxml_prettyprint_result" 'result' '<status>' )"
if ! _value "$results" | grep '<status>ok</status>' | grep -qE '<id>[0-9]+</id>'; then
# Error - doesn't contain expected string. Something's wrong.
_err 'Error when calling Plesk XML API.'
_err 'The result did not contain the expected <id>XXXXX</id> section, or contained other values as well.'
_err 'This is unexpected: something has gone wrong.'
_err 'The full response was:\n' "$pleskxml_prettyprint_result"
return 1
fi
recid="$( _value "$results" | grep -E '<id>[0-9]+</id>' | sed -E 's/^.*<id>([0-9]+)<\/id>.*$/\1/' )"
_info "Success. TXT record appears to be correctly added (Plesk record ID=$recid). Exiting dns_pleskxml_add()."
return 0
}
#Usage: rm _acme-challenge.www.domain.com "XKrxpRBosdIKFzxW_CT3KLZNf6q0HG9i01zxXp5CPBs"
dns_pleskxml_rm() {
fulldomain=$1
txtvalue=$2
_info "Entering dns_pleskxml_rm() to remove TXT record '$2' from domain '$1'..."
# Get credentials if not already checked, and confirm we can log in to Plesk XML API
if ! _credential_check; then
return 1
fi
# Get root and subdomain details, and Plesk domain ID
if ! _pleskxml_get_root_domain "$fulldomain"; then
return 1
fi
_debug 'Credentials OK, and domain identified. Calling Plesk XML API to get list of TXT records and their IDs'
# printf using template in a variable - not a style issue
# shellcheck disable=SC2059
request="$( printf "$pleskxml_tplt_get_dns_records" "$root_domain_id" )"
if ! _call_api "$request"; then
return 1
fi
# Reduce output to one line per DNS record, filtered for TXT records with a record ID only (which they should all have)
reclist="$( _api_response_split "$pleskxml_prettyprint_result" 'result' '<status>ok</status>' | \
grep "<site-id>${root_domain_id}</site-id>" | \
grep -E '<id>[0-9]+</id>' | \
grep '<type>TXT</type>' \
)"
if [ -z "$reclist" ]; then
_err "No TXT records found for root domain ${root_domain_name} (Plesk domain ID ${root_domain_id}). Exiting."
return 1
fi
_debug "Got list of DNS TXT records for root domain '$root_domain_name'"':\n'"$reclist"
recid="$( _value "$reclist" | \
grep "<host>$1.</host>" | \
grep "<value>$txtvalue</value>" | \
sed -E 's/(^.*<id>|<\/id>.*$)//g' \
)"
_debug "List of DNS TXT records for host:"'\n'"$( _value "$reclist" | grep "<host>$1.</host>" )"
if ! _value "$recid" | grep -Eq '^[0-9]+$'; then
_err "DNS records for root domain '${root_domain_name}' (Plesk ID ${root_domain_id}) + host '${sub_domain_name}' do not contain the TXT record '${txtvalue}'"
_err "Cannot delete TXT record. Exiting."
return 1
fi
_debug "Found Plesk record ID for target text string '${txtvalue}': ID=${recid}"
_debug 'Calling Plesk XML API to remove TXT record'
# printf using template in a variable - not a style issue
# shellcheck disable=SC2059
request="$( printf "$pleskxml_tplt_rmv_dns_record" "$recid" )"
if ! _call_api "$request"; then
return 1
fi
# OK, we should have removed a TXT record. Let's check and return success if so.
# All that should be left in the result, is one section, containing <result><status>ok</status><id>PLESK_DELETED_DNS_RECORD_ID</id></result>
results="$( _api_response_split "$pleskxml_prettyprint_result" 'result' '<status>' )"
if ! _value "$results" | grep '<status>ok</status>' | grep -qE '<id>[0-9]+</id>'; then
# Error - doesn't contain expected string. Something's wrong.
_err 'Error when calling Plesk XML API.'
_err 'The result did not contain the expected <id>XXXXX</id> section, or contained other values as well.'
_err 'This is unexpected: something has gone wrong.'
_err 'The full response was:\n' "$pleskxml_prettyprint_result"
return 1
fi
_info "Success. TXT record appears to be correctly removed. Exiting dns_pleskxml_rm()."
return 0
}
#################### Private functions below ##################################
# Outputs value of a variable
_value() {
printf '%s' "$1"
}
# Outputs value of a variable (FQDN) and cuts it at 2 delimiters
# $1, $2 = where to cut
# $3 = FQDN
_valuecut() {
printf '%s' "$3" | cut -d . -f "${1}-${2}"
}
# Cleans up an API response, splits it "per item" and greps for a string to validate useful lines
# $1 - result string from API
# $2 - tag to resplit on (usually "result" or "domain")
# $3 - regex to recognise useful return lines
_api_response_split() {
printf '%s' "$1" | \
sed -E 's/(^[[:space:]]+|[[:space:]]+$)//g' | \
tr -d '\n\r' | \
sed -E "s/<\/?$2>/${NEWLINE}/g" | \
grep -E "$3"
}
# Calls Plesk XML API, and checks results for obvious issues
_call_api() {
request="$1"
errtext=''
_debug 'Entered _call_api(). Calling Plesk XML API with request:\n' "'${request}'"
export _H1="HTTP_AUTH_LOGIN: $pleskxml_user"
export _H2="HTTP_AUTH_PASSWD: $pleskxml_pass"
export _H3="content-Type: text/xml"
export _H4="HTTP_PRETTY_PRINT: true"
pleskxml_prettyprint_result="$(_post "${request}" "$pleskxml_uri" "" "POST")"
pleskxml_retcode="$?"
_debug "acme _post() returned retcode=$pleskxml_retcode. Literal response:" '\n' "'${pleskxml_prettyprint_result}'"
# Error handling
# Detect any <status> that isn't "ok". None of the used calls should fail if the API is working correctly.
# Also detect if there simply aren't any status lines (null result?) and report that, as well.
statuslines="$( echo "$pleskxml_prettyprint_result" | grep -E '^[[:space:]]*<status>[^<]*</status>[[:space:]]*$' )"
if _value "$statuslines" | grep -qv '<status>ok</status>'; then
# We have some status lines that aren't "ok". Get the details
errtext="$( \
_value "$pleskxml_prettyprint_result" | \
grep -iE "(<status>|<errcode>|<errtext>)" | \
sed -E 's/(^[[:space:]]+|<\/[a-z]+$)//g' | \
sed -E 's/^<([a-z]+)>/\1: /' \
)"
elif ! _value "$statuslines" | grep -q '<status>ok</status>'; then
# We have no status lines at all. Results are empty
errtext='The Plesk XML API unexpectedly returned an empty set of results for this call.'
fi
if [ "$pleskxml_retcode" -ne 0 ] || [ "$errtext" != "" ]; then
_err "The Plesk XML API call failed."
_err "The return code for the POST request was $pleskxml_retcode (0=success)."
if [ "$errtext" != "" ]; then
_err 'Status and error messages received from the Plesk server:\n' "$errtext"
else
_err "No additional error messages were received back from the Plesk server"
fi
return 1
fi
_debug "Leaving _call_api(). Successful call."
return 0
}
_credential_check() {
# Startup checks (credentials, URI)
_debug "Checking Plesk XML API login credentials and URI..."
if [ "$pleskxml_init_checks_done" -eq 1 ]; then
_debug "Initial checks already done, no need to repeat. Skipped."
return 0
fi
pleskxml_user="${pleskxml_user:-$(_readaccountconf_mutable pleskxml_user)}"
pleskxml_pass="${pleskxml_pass:-$(_readaccountconf_mutable pleskxml_pass)}"
pleskxml_uri="${pleskxml_uri:-$(_readaccountconf_mutable pleskxml_uri)}"
_debug "Credentials - User: '${pleskxml_user}' Passwd: ****** URI: '${pleskxml_uri}'"
if [ -z "$pleskxml_user" ] || [ -z "$pleskxml_pass" ] || [ -z "$pleskxml_uri" ]; then
pleskxml_user=""
pleskxml_pass=""
pleskxml_uri=""
_err "You didn't specify one or more of the Plesk XML API username, password, or URI."
_err "Please create these and try again."
_err "Instructions are in the module source code."
return 1
fi
# Test the API is usable, by trying to read the list of managed domains...
_call_api "$pleskxml_tplt_get_domains"
if [ "$pleskxml_retcode" -ne 0 ]; then
_err '\nFailed to access Plesk XML API.'
_err "Please check your login credentials and Plesk URI, and that the URI is reachable, and try again."
return 1
fi
_saveaccountconf_mutable pleskxml_uri "$pleskxml_uri"
_saveaccountconf_mutable pleskxml_user "$pleskxml_user"
_saveaccountconf_mutable pleskxml_pass "$pleskxml_pass"
_debug "Test login to Plesk XML API successful. Login credentials and URI successfully saved to the acme.sh configuration file for future use."
pleskxml_init_checks_done=1
return 0
}
# For a FQDN, identify the root domain managed by Plesk, its domain ID in Plesk, and the host if any.
_pleskxml_get_root_domain() {
_debug "Identifying DNS root domain for '$1' that is managed by the Plesk account."
# test if the domain is valid for splitting.
if _value "$root_domain_name" | grep -qvE '^[^.]+\.[^.]+\.[^.]'; then
### COMMENTED OUT ALSO FOR SAME REASON
### _err "Invalid domain. The ACME domain must contain at least three parts (aa.bb.tld) to identify a host, domain, and tld for the TXT record."
_err "Invalid domain. The ACME domain must contain at least two parts (aa.bb) to identify a domain and tld for the TXT record."
return 1
fi
_debug "Querying Plesk server for list of managed domains..."
_call_api "$pleskxml_tplt_get_domains"
if [ "$pleskxml_retcode" -ne 0 ]; then
return 1
fi
# Generate a hacked list of domains known to this Plesk account.
# We convert <ascii-name> tags to <name> so it'll flag on a hit with either <name> or <ascii-name> fields,
# for non-Western character sets.
# Output will be one line per known domain, containing 1 or 2 <name> tages and an <id> tag
# We don't actually need to check for type, name, *and* id, but it guarantees only usable lines are returned.
output="$( _api_response_split "$pleskxml_prettyprint_result" 'domain' '<type>domain</type>' | sed -E 's/<(\/?)ascii-name>/<\1name>/g' | grep '<name>' | grep '<id>' )"
_debug 'Domains managed by Plesk server are (ignore the hacked output):\n' "$output"
# loop and test if domain, or any parent domain, is managed by Plesk
# Loop until we don't have any '.' in the sring we're testing as a root domain
root_domain_name="$1"
doneloop=0
while _contains "$root_domain_name" '\.'; do
_debug "Checking if '$root_domain_name' is managed by the Plesk server..."
root_domain_id="$( _value "$output" | grep "<name>$root_domain_name</name>" | _head_n 1 | sed -E 's/^.*<id>([0-9]+)<\/id>.*$/\1/' )"
if [ -n "$root_domain_id" ]; then
# Found a match
# Note that a result with host = empty string is OK for this API, see
# https://docs.plesk.com/en-US/obsidian/api-rpc/about-xml-api/reference/managing-dns/managing-dns-records/adding-dns-record.34798
# See notes at top of this file
sub_domain_name="$( _value "$1" | sed -E "s/\.?${root_domain_name}"'$//' )"
_info "Matched host '$1' to: DOMAIN '${root_domain_name}' (Plesk ID '${root_domain_id}'), HOST '${sub_domain_name}'. Returning."
return 0
fi
# No match, try next parent up (if any)...
if _contains "$root_domain_name" '\.[^.]+\.'; then
_debug "No match, trying next parent up..."
else
_debug "No match,and next parent would be a TLD..."
fi
root_domain_name="$( _valuecut 2 1000 "$root_domain_name" )"
doneloop=1
done
# if we get here, we failed to find a root domain match in the list of domains managed by Plesk.
# if we never ran the loop a first time, $1 wasn't at least a 2 level domain (domain.tld) and wasn't valid anyway
if [ -z $doneloop ]; then
_err "'$1' isn't a valid domain for ACME DNS. Exiting."
else
_err "Cannot find '$1' or any parent domain of it, in Plesk."
_err "Are you sure that this domain is managed by this Plesk server?"
fi
return 1
}