dnsapi/dns_pleskxml.sh

   1 #!/usr/bin/env sh
   2
   3 ##  Name: dns_pleskxml.sh
   4 ##  Created by Stilez.
   5 ##  Also uses some code from PR#1832 by @romanlum (https://github.com/acmesh-official/acme.sh/pull/1832/files)
   6
   7 ##  This DNS-01 method uses the Plesk XML API described at:
   8 ##  https://docs.plesk.com/en-US/12.5/api-rpc/about-xml-api.28709
   9 ##  and more specifically: https://docs.plesk.com/en-US/12.5/api-rpc/reference.28784
  10
  11 ##  Note: a DNS ID with host = empty string is OK for this API, see
  12 ##  https://docs.plesk.com/en-US/obsidian/api-rpc/about-xml-api/reference/managing-dns/managing-dns-records/adding-dns-record.34798
  13 ##  For example, to add a TXT record to DNS alias domain "acme-alias.com" would be a valid Plesk action.
  14 ##  So this API module can handle such a request, if needed.
  15
  16 ##  For ACME v2 purposes, new TXT records are appended when added, and removing one TXT record will not affect any other TXT records.
  17
  18 ##  The user credentials (username+password) and URL/URI for the Plesk XML API must be set by the user
  19 ##  before this module is called (case sensitive):
  20 ##
  21 ##  ```
  22 ##  export pleskxml_uri="https://address-of-my-plesk-server.net:8443/enterprise/control/agent.php"
  23 ##          (or probably something similar)
  24 ##  export pleskxml_user="my plesk username"
  25 ##  export pleskxml_pass="my plesk password"
  26 ##  ```
  27
  28 ##  Ok, let's issue a cert now:
  29 ##  ```
  30 ##  acme.sh --issue --dns dns_pleskxml -d example.com -d www.example.com
  31 ##  ```
  32 ##
  33 ##  The `pleskxml_uri`, `pleskxml_user` and `pleskxml_pass` will be saved in `~/.acme.sh/account.conf` and reused when needed.
  34
  35 ####################  INTERNAL VARIABLES + NEWLINE + API TEMPLATES ##################################
  36
  37 pleskxml_init_checks_done=0
  38
  39 # Variable containing bare newline - not a style issue
  40 # shellcheck disable=SC1004
  41 NEWLINE='\
  42 '
  43
  44 pleskxml_tplt_get_domains="<packet><customer><get-domain-list><filter/></get-domain-list></customer></packet>"
  45 # Get a list of domains that PLESK can manage, so we can check root domain + host for acme.sh
  46 # Also used to test credentials and URI.
  47 # No params.
  48
  49 pleskxml_tplt_get_dns_records="<packet><dns><get_rec><filter><site-id>%s</site-id></filter></get_rec></dns></packet>"
  50 # Get all DNS records for a Plesk domain ID.
  51 # PARAM = Plesk domain id to query
  52
  53 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>"
  54 # Add a TXT record to a domain.
  55 # PARAMS = (1) Plesk internal domain ID, (2) "hostname" for the new record, eg '_acme_challenge', (3) TXT record value
  56
  57 pleskxml_tplt_rmv_dns_record="<packet><dns><del_rec><filter><id>%s</id></filter></del_rec></dns></packet>"
  58 # Delete a specific TXT record from a domain.
  59 # PARAM = the Plesk internal ID for the DNS record to be deleted
  60
  61 ####################  Public functions ##################################
  62
  63 #Usage: dns_pleskxml_add   _acme-challenge.www.domain.com   "XKrxpRBosdIKFzxW_CT3KLZNf6q0HG9i01zxXp5CPBs"
  64 dns_pleskxml_add() {
  65   fulldomain=$1
  66   txtvalue=$2
  67
  68   _info "Entering dns_pleskxml_add() to add TXT record '$txtvalue' to domain '$fulldomain'..."
  69
  70   # Get credentials if not already checked, and confirm we can log in to Plesk XML API
  71   if ! _credential_check; then
  72     return 1
  73   fi
  74
  75   # Get root and subdomain details, and Plesk domain ID
  76   if ! _pleskxml_get_root_domain "$fulldomain"; then
  77     return 1
  78   fi
  79
  80   _debug 'Credentials OK, and domain identified. Calling Plesk XML API to add TXT record'
  81
  82   # printf using template in a variable - not a style issue
  83   # shellcheck disable=SC2059
  84   request="$(printf "$pleskxml_tplt_add_txt_record" "$root_domain_id" "$sub_domain_name" "$txtvalue")"
  85   if ! _call_api "$request"; then
  86     return 1
  87   fi
  88
  89   # OK, we should have added a TXT record. Let's check and return success if so.
  90   # All that should be left in the result, is one section, containing <result><status>ok</status><id>NEW_DNS_RECORD_ID</id></result>
  91
  92   results="$(_api_response_split "$pleskxml_prettyprint_result" 'result' '<status>')"
  93
  94   if ! _value "$results" | grep '<status>ok</status>' | grep '<id>[0-9]\{1,\}</id>' >/dev/null; then
  95     # Error - doesn't contain expected string. Something's wrong.
  96     _err 'Error when calling Plesk XML API.'
  97     _err 'The result did not contain the expected <id>XXXXX</id> section, or contained other values as well.'
  98     _err 'This is unexpected: something has gone wrong.'
  99     _err 'The full response was:'
 100     _err "$pleskxml_prettyprint_result"
 101     return 1
 102   fi
 103
 104   recid="$(_value "$results" | grep '<id>[0-9]\{1,\}</id>' | sed 's/^.*<id>\([0-9]\{1,\}\)<\/id>.*$/\1/')"
 105
 106   _info "Success. TXT record appears to be correctly added (Plesk record ID=$recid). Exiting dns_pleskxml_add()."
 107
 108   return 0
 109 }
 110
 111 #Usage: dns_pleskxml_rm   _acme-challenge.www.domain.com   "XKrxpRBosdIKFzxW_CT3KLZNf6q0HG9i01zxXp5CPBs"
 112 dns_pleskxml_rm() {
 113   fulldomain=$1
 114   txtvalue=$2
 115
 116   _info "Entering dns_pleskxml_rm() to remove TXT record '$txtvalue' from domain '$fulldomain'..."
 117
 118   # Get credentials if not already checked, and confirm we can log in to Plesk XML API
 119   if ! _credential_check; then
 120     return 1
 121   fi
 122
 123   # Get root and subdomain details, and Plesk domain ID
 124   if ! _pleskxml_get_root_domain "$fulldomain"; then
 125     return 1
 126   fi
 127
 128   _debug 'Credentials OK, and domain identified. Calling Plesk XML API to get list of TXT records and their IDs'
 129
 130   # printf using template in a variable - not a style issue
 131   # shellcheck disable=SC2059
 132   request="$(printf "$pleskxml_tplt_get_dns_records" "$root_domain_id")"
 133   if ! _call_api "$request"; then
 134     return 1
 135   fi
 136
 137   # Reduce output to one line per DNS record, filtered for TXT records with a record ID only (which they should all have)
 138   # Also strip out spaces between tags, redundant <data> and </data> group tags and any <self-closing/> tags
 139   reclist="$(
 140     _api_response_split "$pleskxml_prettyprint_result" 'result' '<status>ok</status>' |
 141       sed 's# \{1,\}<\([a-zA-Z]\)#<\1#g;s#</\{0,1\}data>##g;s#<[a-z][^/<>]*/>##g' |
 142       grep "<site-id>${root_domain_id}</site-id>" |
 143       grep '<id>[0-9]\{1,\}</id>' |
 144       grep '<type>TXT</type>'
 145   )"
 146
 147   if [ -z "$reclist" ]; then
 148     _err "No TXT records found for root domain ${root_domain_name} (Plesk domain ID ${root_domain_id}). Exiting."
 149     return 1
 150   fi
 151
 152   _debug "Got list of DNS TXT records for root domain '$root_domain_name':"
 153   _debug "$reclist"
 154
 155   recid="$(
 156     _value "$reclist" |
 157       grep "<host>${fulldomain}.</host>" |
 158       grep "<value>${txtvalue}</value>" |
 159       sed 's/^.*<id>\([0-9]\{1,\}\)<\/id>.*$/\1/'
 160   )"
 161
 162   if ! _value "$recid" | grep '^[0-9]\{1,\}$' >/dev/null; then
 163     _err "DNS records for root domain '${root_domain_name}' (Plesk ID ${root_domain_id}) + host '${sub_domain_name}' do not contain the TXT record '${txtvalue}'"
 164     _err "Cannot delete TXT record. Exiting."
 165     return 1
 166   fi
 167
 168   _debug "Found Plesk record ID for target text string '${txtvalue}': ID=${recid}"
 169   _debug 'Calling Plesk XML API to remove TXT record'
 170
 171   # printf using template in a variable - not a style issue
 172   # shellcheck disable=SC2059
 173   request="$(printf "$pleskxml_tplt_rmv_dns_record" "$recid")"
 174   if ! _call_api "$request"; then
 175     return 1
 176   fi
 177
 178   # OK, we should have removed a TXT record. Let's check and return success if so.
 179   # All that should be left in the result, is one section, containing <result><status>ok</status><id>PLESK_DELETED_DNS_RECORD_ID</id></result>
 180
 181   results="$(_api_response_split "$pleskxml_prettyprint_result" 'result' '<status>')"
 182
 183   if ! _value "$results" | grep '<status>ok</status>' | grep '<id>[0-9]\{1,\}</id>' >/dev/null; then
 184     # Error - doesn't contain expected string. Something's wrong.
 185     _err 'Error when calling Plesk XML API.'
 186     _err 'The result did not contain the expected <id>XXXXX</id> section, or contained other values as well.'
 187     _err 'This is unexpected: something has gone wrong.'
 188     _err 'The full response was:'
 189     _err "$pleskxml_prettyprint_result"
 190     return 1
 191   fi
 192
 193   _info "Success. TXT record appears to be correctly removed. Exiting dns_pleskxml_rm()."
 194   return 0
 195 }
 196
 197 ####################  Private functions below (utility functions) ##################################
 198
 199 # Outputs value of a variable without additional newlines etc
 200 _value() {
 201   printf '%s' "$1"
 202 }
 203
 204 # Outputs value of a variable (FQDN) and cuts it at 2 specified '.' delimiters, returning the text in between
 205 # $1, $2 = where to cut
 206 # $3 = FQDN
 207 _valuecut() {
 208   printf '%s' "$3" | cut -d . -f "${1}-${2}"
 209 }
 210
 211 # Counts '.' present in a domain name or other string
 212 # $1 = domain name
 213 _countdots() {
 214   _value "$1" | tr -dc '.' | wc -c | sed 's/ //g'
 215 }
 216
 217 # Cleans up an API response, splits it "one line per item in the response" and greps for a string that in the context, identifies "useful" lines
 218 # $1 - result string from API
 219 # $2 - plain text tag to resplit on (usually "result" or "domain"). NOT REGEX
 220 # $3 - basic regex to recognise useful return lines
 221 # note: $3 matches via basic NOT extended regex (BRE), as extended regex capabilities not needed at the moment.
 222 #       Last line could change to <sed -n '/.../p'> instead, with suitable escaping of ['"/$],
 223 #       if future Plesk XML API changes ever require extended regex
 224 _api_response_split() {
 225   printf '%s' "$1" |
 226     sed 's/^ +//;s/ +$//' |
 227     tr -d '\n\r' |
 228     sed "s/<\/\{0,1\}$2>/${NEWLINE}/g" |
 229     grep "$3"
 230 }
 231
 232 ####################  Private functions below (DNS functions) ##################################
 233
 234 # Calls Plesk XML API, and checks results for obvious issues
 235 _call_api() {
 236   request="$1"
 237   errtext=''
 238
 239   _debug 'Entered _call_api(). Calling Plesk XML API with request:'
 240   _debug "'$request'"
 241
 242   export _H1="HTTP_AUTH_LOGIN: $pleskxml_user"
 243   export _H2="HTTP_AUTH_PASSWD: $pleskxml_pass"
 244   export _H3="content-Type: text/xml"
 245   export _H4="HTTP_PRETTY_PRINT: true"
 246   pleskxml_prettyprint_result="$(_post "${request}" "$pleskxml_uri" "" "POST")"
 247   pleskxml_retcode="$?"
 248   _debug 'The responses from the Plesk XML server were:'
 249   _debug "retcode=$pleskxml_retcode. Literal response:"
 250   _debug "'$pleskxml_prettyprint_result'"
 251
 252   # Detect any <status> that isn't "ok". None of the used calls should fail if the API is working correctly.
 253   # Also detect if there simply aren't any status lines (null result?) and report that, as well.
 254
 255   statuslines_count_total="$(echo "$pleskxml_prettyprint_result" | grep -c '^ *<status>[^<]*</status> *$')"
 256   statuslines_count_okay="$(echo "$pleskxml_prettyprint_result" | grep -c '^ *<status>ok</status> *$')"
 257
 258   if [ -z "$statuslines_count_total" ]; then
 259
 260     # We have no status lines at all. Results are empty
 261     errtext='The Plesk XML API unexpectedly returned an empty set of results for this call.'
 262
 263   elif [ "$statuslines_count_okay" -ne "$statuslines_count_total" ]; then
 264
 265     # We have some status lines that aren't "ok". Any available details are in API response fields "status" "errcode" and "errtext"
 266     # Workaround for basic regex:
 267     #   - filter output to keep only lines like this: "SPACES<TAG>text</TAG>SPACES" (shouldn't be necessary with prettyprint but guarantees subsequent code is ok)
 268     #   - then edit the 3 "useful" error tokens individually and remove closing tags on all lines
 269     #   - then filter again to remove all lines not edited (which will be the lines not starting A-Z)
 270     errtext="$(
 271       _value "$pleskxml_prettyprint_result" |
 272         grep '^ *<[a-z]\{1,\}>[^<]*<\/[a-z]\{1,\}> *$' |
 273         sed 's/^ *<status>/Status:     /;s/^ *<errcode>/Error code: /;s/^ *<errtext>/Error text: /;s/<\/.*$//' |
 274         grep '^[A-Z]'
 275     )"
 276
 277   fi
 278
 279   if [ "$pleskxml_retcode" -ne 0 ] || [ "$errtext" != "" ]; then
 280     # Call failed, for reasons either in the retcode or the response text...
 281
 282     if [ "$pleskxml_retcode" -eq 0 ]; then
 283       _err "The POST request was successfully sent to the Plesk server."
 284     else
 285       _err "The return code for the POST request was $pleskxml_retcode (non-zero = failure in submitting request to server)."
 286     fi
 287
 288     if [ "$errtext" != "" ]; then
 289       _err 'The error responses received from the Plesk server were:'
 290       _err "$errtext"
 291     else
 292       _err "No additional error messages were received back from the Plesk server"
 293     fi
 294
 295     _err "The Plesk XML API call failed."
 296     return 1
 297
 298   fi
 299
 300   _debug "Leaving _call_api(). Successful call."
 301
 302   return 0
 303 }
 304
 305 # Startup checks (credentials, URI)
 306 _credential_check() {
 307   _debug "Checking Plesk XML API login credentials and URI..."
 308
 309   if [ "$pleskxml_init_checks_done" -eq 1 ]; then
 310     _debug "Initial checks already done, no need to repeat. Skipped."
 311     return 0
 312   fi
 313
 314   pleskxml_user="${pleskxml_user:-$(_readaccountconf_mutable pleskxml_user)}"
 315   pleskxml_pass="${pleskxml_pass:-$(_readaccountconf_mutable pleskxml_pass)}"
 316   pleskxml_uri="${pleskxml_uri:-$(_readaccountconf_mutable pleskxml_uri)}"
 317
 318   if [ -z "$pleskxml_user" ] || [ -z "$pleskxml_pass" ] || [ -z "$pleskxml_uri" ]; then
 319     pleskxml_user=""
 320     pleskxml_pass=""
 321     pleskxml_uri=""
 322     _err "You didn't specify one or more of the Plesk XML API username, password, or URI."
 323     _err "Please create these and try again."
 324     _err "Instructions are in the 'dns_pleskxml' plugin source code or in the acme.sh documentation."
 325     return 1
 326   fi
 327
 328   # Test the API is usable, by trying to read the list of managed domains...
 329   _call_api "$pleskxml_tplt_get_domains"
 330   if [ "$pleskxml_retcode" -ne 0 ]; then
 331     _err 'Failed to access Plesk XML API.'
 332     _err "Please check your login credentials and Plesk URI, and that the URI is reachable, and try again."
 333     return 1
 334   fi
 335
 336   _saveaccountconf_mutable pleskxml_uri "$pleskxml_uri"
 337   _saveaccountconf_mutable pleskxml_user "$pleskxml_user"
 338   _saveaccountconf_mutable pleskxml_pass "$pleskxml_pass"
 339
 340   _debug "Test login to Plesk XML API successful. Login credentials and URI successfully saved to the acme.sh configuration file for future use."
 341
 342   pleskxml_init_checks_done=1
 343
 344   return 0
 345 }
 346
 347 # For a FQDN, identify the root domain managed by Plesk, its domain ID in Plesk, and the host if any.
 348
 349 # IMPORTANT NOTE:  a result with host = empty string is OK for this API, see
 350 # https://docs.plesk.com/en-US/obsidian/api-rpc/about-xml-api/reference/managing-dns/managing-dns-records/adding-dns-record.34798
 351 # See notes at top of this file
 352
 353 _pleskxml_get_root_domain() {
 354   original_full_domain_name="$1"
 355
 356   _debug "Identifying DNS root domain for '$original_full_domain_name' that is managed by the Plesk account."
 357
 358   # test if the domain as provided is valid for splitting.
 359
 360   if [ "$(_countdots "$original_full_domain_name")" -eq 0 ]; then
 361     _err "Invalid domain. The ACME domain must contain at least two parts (aa.bb) to identify a domain and tld for the TXT record."
 362     return 1
 363   fi
 364
 365   _debug "Querying Plesk server for list of managed domains..."
 366
 367   _call_api "$pleskxml_tplt_get_domains"
 368   if [ "$pleskxml_retcode" -ne 0 ]; then
 369     return 1
 370   fi
 371
 372   # Generate a crude list of domains known to this Plesk account.
 373   # We convert <ascii-name> tags to <name> so it'll flag on a hit with either <name> or <ascii-name> fields,
 374   # for non-Western character sets.
 375   # Output will be one line per known domain, containing 2 <name> tages and a single <id> tag
 376   # We don't actually need to check for type, name, *and* id, but it guarantees only usable lines are returned.
 377
 378   output="$(_api_response_split "$pleskxml_prettyprint_result" 'domain' '<type>domain</type>' | sed 's/<ascii-name>/<name>/g;s/<\/ascii-name>/<\/name>/g' | grep '<name>' | grep '<id>')"
 379
 380   _debug 'Domains managed by Plesk server are (ignore the hacked output):'
 381   _debug "$output"
 382
 383   # loop and test if domain, or any parent domain, is managed by Plesk
 384   # Loop until we don't have any '.' in the string we're testing as a candidate Plesk-managed domain
 385
 386   root_domain_name="$original_full_domain_name"
 387
 388   while true; do
 389
 390     _debug "Checking if '$root_domain_name' is managed by the Plesk server..."
 391
 392     root_domain_id="$(_value "$output" | grep "<name>$root_domain_name</name>" | _head_n 1 | sed 's/^.*<id>\([0-9]\{1,\}\)<\/id>.*$/\1/')"
 393
 394     if [ -n "$root_domain_id" ]; then
 395       # Found a match
 396       # SEE IMPORTANT NOTE ABOVE - THIS FUNCTION CAN RETURN HOST='', AND THAT'S OK FOR PLESK XML API WHICH ALLOWS IT.
 397       # SO WE HANDLE IT AND DON'T PREVENT IT
 398       sub_domain_name="$(_value "$original_full_domain_name" | sed "s/\.\{0,1\}${root_domain_name}"'$//')"
 399       _info "Success. Matched host '$original_full_domain_name' to: DOMAIN '${root_domain_name}' (Plesk ID '${root_domain_id}'), HOST '${sub_domain_name}'. Returning."
 400       return 0
 401     fi
 402
 403     # No match, try next parent up (if any)...
 404
 405     root_domain_name="$(_valuecut 2 1000 "$root_domain_name")"
 406
 407     if [ "$(_countdots "$root_domain_name")" -eq 0 ]; then
 408       _debug "No match, and next parent would be a TLD..."
 409       _err "Cannot find '$original_full_domain_name' or any parent domain of it, in Plesk."
 410       _err "Are you sure that this domain is managed by this Plesk server?"
 411       return 1
 412     fi
 413
 414     _debug "No match, trying next parent up..."
 415
 416   done
 417 }