Return instead of exit.

Clear OTP secret if environment variable is set to empty. This is for when the 2FA is disabled. Rename `_is_idn` function to `_is_idn_cyon`. Remove usage of curl (except for URL encoding of data). Instead of cleaning up the cookie jar, get rid of it completely and logout of cyon instead.
8 years ago · 2698ef6c5f
1 changed files with 118 additions and 124 deletions
--- a/dnsapi/dns_cyon.sh
+++ b/dnsapi/dns_cyon.sh
@ -33,29 +33,23 @@
 ########

 dns_cyon_add() {
-  _load_credentials
-  _load_parameters "$@"
-
-  _info_header "add"
-  _login
-  _domain_env
-  _add_txt
-  _cleanup
-
-  return 0
+  _load_credentials \
+  && _load_parameters "$@" \
+  && _info_header "add" \
+  && _login \
+  && _domain_env \
+  && _add_txt \
+  && _logout
 }

 dns_cyon_rm() {
-  _load_credentials
-  _load_parameters "$@"
-
-  _info_header "delete"
-  _login
-  _domain_env
-  _delete_txt
-  _cleanup
-
-  return 0
+  _load_credentials \
+  && _load_parameters "$@" \
+  && _info_header "delete" \
+  && _login \
+  && _domain_env \
+  && _delete_txt \
+  && _logout
 }

 #########################
@ -65,20 +59,22 @@ dns_cyon_rm() {
 _load_credentials() {
  # Convert loaded password to/from base64 as needed.
  if [ "${cyon_password_b64}" ]; then
-    cyon_password="$(printf "%s" "${cyon_password_b64}" | _dbase64)"
+    cyon_password="$(printf "%s" "${cyon_password_b64}" | _dbase64 "multiline")"
  elif [ "${cyon_password}" ]; then
    cyon_password_b64="$(printf "%s" "${cyon_password}" | _base64)"
  fi

  if [ -z "${cyon_username}" ] || [ -z "${cyon_password}" ]; then
+    # Dummy entries to satify script checker.
    cyon_username=""
    cyon_password=""
    cyon_otp_secret=""
+
    _err ""
    _err "You haven't set your cyon.ch login credentials yet."
    _err "Please set the required cyon environment variables."
    _err ""
-    exit 1
+    return 1
  fi

  # Save the login credentials to the account.conf file.
@ -87,44 +83,52 @@ _load_credentials() {
  _saveaccountconf cyon_password_b64 "$cyon_password_b64"
  if [ ! -z "${cyon_otp_secret}" ]; then
    _saveaccountconf cyon_otp_secret "$cyon_otp_secret"
+  else
+    _clearaccountconf cyon_otp_secret
  fi
 }

-_is_idn() {
-  _idn_temp=$(printf "%s" "$1" | tr -d "[0-9a-zA-Z.,-]")
-  _idn_temp2="$(printf "%s" "$1" | grep -o "xn--")"
+_is_idn_cyon() {
+  _idn_temp="$(printf "%s" "${1}" | tr -d "[0-9a-zA-Z.,-_]")"
+  _idn_temp2="$(printf "%s" "${1}" | grep -o "xn--")"
  [ "$_idn_temp" ] || [ "$_idn_temp2" ]
 }

+# comment on https://stackoverflow.com/a/10797966
+_urlencode_cyon() {
+  curl -Gso /dev/null -w %{url_effective} --data-urlencode @- "" | cut -c 3-
+}
+
 _load_parameters() {
  # Read the required parameters to add the TXT entry.
-  fulldomain="$(printf "%s" "$1" | tr '[:upper:]' '[:lower:]')"
+  fulldomain="$(printf "%s" "${1}" | tr '[:upper:]' '[:lower:]')"
  fulldomain_idn="${fulldomain}"

  # Special case for IDNs, as cyon needs a domain environment change,
  # which uses the "pretty" instead of the punycode version.
-  if _is_idn "$1"; then
+  if _is_idn_cyon "${fulldomain}"; then
    if ! _exists idn; then
-      _fail "Please install idn to process IDN names."
+      _err "Please install idn to process IDN names."
+      _err ""
+      return 1
    fi

    fulldomain="$(idn -u "${fulldomain}")"
    fulldomain_idn="$(idn -a "${fulldomain}")"
  fi

-  _debug fulldomain "$fulldomain"
-  _debug fulldomain_idn "$fulldomain_idn"
+  _debug fulldomain "${fulldomain}"
+  _debug fulldomain_idn "${fulldomain_idn}"

-  txtvalue="$2"
-  _debug txtvalue "$txtvalue"
+  txtvalue="${2}"
+  _debug txtvalue "${txtvalue}"

-  # Cookiejar required for login session, as cyon.ch has no official API (yet).
-  cookiejar=$(tempfile)
-  _debug cookiejar "$cookiejar"
+  # This header is required for curl calls.
+  _H1="X-Requested-With: XMLHttpRequest"
 }

 _info_header() {
-  if [ "$1" = "add" ]; then
+  if [ "${1}" = "add" ]; then
    _info ""
    _info "+---------------------------------------------+"
    _info "| Adding DNS TXT entry to your cyon.ch domain |"
@ -132,42 +136,46 @@ _info_header() {
    _info ""
    _info "  * Full Domain: ${fulldomain}"
    _info "  * TXT Value:   ${txtvalue}"
-    _info "  * Cookie Jar:  ${cookiejar}"
    _info ""
-  elif [ "$1" = "delete" ]; then
+  elif [ "${1}" = "delete" ]; then
    _info ""
    _info "+-------------------------------------------------+"
    _info "| Deleting DNS TXT entry from your cyon.ch domain |"
    _info "+-------------------------------------------------+"
    _info ""
    _info "  * Full Domain: ${fulldomain}"
-    _info "  * Cookie Jar:  ${cookiejar}"
    _info ""
  fi
 }

+_get_cookie_header() {
+  printf "%s" "$(sed -n 's/Set-\(Cookie:.*cyon=[^;]*\).*/\1/p' "$HTTP_HEADER" | _tail_n 1)"
+}
+
 _login() {
  _info "  - Logging in..."
-  login_response=$(curl \
-    "https://my.cyon.ch/auth/index/dologin-async" \
-    -s \
-    -c "${cookiejar}" \
-    -H "X-Requested-With: XMLHttpRequest" \
-    --data-urlencode "username=${cyon_username}" \
-    --data-urlencode "password=${cyon_password}" \
-    --data-urlencode "pathname=/")

+  username_encoded="$(printf "%s" "${cyon_username}" | _urlencode_cyon)"
+  password_encoded="$(printf "%s" "${cyon_password}" | _urlencode_cyon)"
+
+  login_url="https://my.cyon.ch/auth/index/dologin-async"
+  login_data="$(printf "%s" "username=${username_encoded}&password=${password_encoded}&pathname=%2F")"
+
+  login_response="$(_post "$login_data" "$login_url")"
  _debug login_response "${login_response}"

  # Bail if login fails.
  if [ "$(printf "%s" "${login_response}" | _get_response_success)" != "success" ]; then
-    _fail "    $(printf "%s" "${login_response}" | _get_response_message)"
+    _err "    $(printf "%s" "${login_response}" | _get_response_message)"
+    _err ""
+    return 1
  fi

  _info "    success"

-  # NECESSARY!! Load the main page after login, before the OTP check.
-  curl "https://my.cyon.ch/" -s --compressed -b "${cookiejar}" >/dev/null
+  # NECESSARY!! Load the main page after login, to get the new cookie.
+  _H2="$(_get_cookie_header)"
+  _get "https://my.cyon.ch/" > /dev/null

  # todo: instead of just checking if the env variable is defined, check if we actually need to do a 2FA auth request.

@ -176,26 +184,25 @@ _login() {
    _info "  - Authorising with OTP code..."

    if ! _exists oathtool; then
-      _fail "Please install oathtool to use 2 Factor Authentication."
+      _err "Please install oathtool to use 2 Factor Authentication."
+      _err ""
+      return 1
    fi

    # Get OTP code with the defined secret.
-    otp_code=$(oathtool --base32 --totp "${cyon_otp_secret}" 2>/dev/null)
+    otp_code="$(oathtool --base32 --totp "${cyon_otp_secret}" 2>/dev/null)"

-    otp_response=$(curl \
-      "https://my.cyon.ch/auth/multi-factor/domultifactorauth-async" \
-      -s \
-      --compressed \
-      -b "${cookiejar}" \
-      -c "${cookiejar}" \
-      -H "X-Requested-With: XMLHttpRequest" \
-      -d "totpcode=${otp_code}&pathname=%2F&rememberme=0")
+    login_otp_url="https://my.cyon.ch/auth/multi-factor/domultifactorauth-async"
+    login_otp_data="totpcode=${otp_code}&pathname=%2F&rememberme=0"

-    _debug otp_response "${otp_response}"
+    login_otp_response="$(_post "$login_otp_data" "$login_otp_url")"
+    _debug login_otp_response "${login_otp_response}"

    # Bail if OTP authentication fails.
-    if [ "$(printf "%s" "${otp_response}" | _get_response_success)" != "success" ]; then
-      _fail "    $(printf "%s" "${otp_response}" | _get_response_message)"
+    if [ "$(printf "%s" "${login_otp_response}" | _get_response_success)" != "success" ]; then
+      _err "    $(printf "%s" "${login_otp_response}" | _get_response_message)"
+      _err ""
+      return 1
    fi

    _info "    success"
@ -204,29 +211,36 @@ _login() {
  _info ""
 }

+_logout() {
+  _info "  - Logging out..."
+
+  _get "https://my.cyon.ch/auth/index/dologout" > /dev/null
+
+  _info "    success"
+  _info ""
+}
+
 _domain_env() {
  _info "  - Changing domain environment..."

  # Get the "example.com" part of the full domain name.
-  domain_env=$(printf "%s" "${fulldomain}" | sed -E -e 's/.*\.(.*\..*)$/\1/')
+  domain_env="$(printf "%s" "${fulldomain}" | sed -E -e 's/.*\.(.*\..*)$/\1/')"
  _debug "Changing domain environment to ${domain_env}"

-  domain_env_response=$(curl \
-    "https://my.cyon.ch/user/environment/setdomain/d/${domain_env}/gik/domain%3A${domain_env}" \
-    -s \
-    --compressed \
-    -b "${cookiejar}" \
-    -H "X-Requested-With: XMLHttpRequest")
+  domain_env_url="https://my.cyon.ch/user/environment/setdomain/d/${domain_env}/gik/domain%3A${domain_env}"

+  domain_env_response="$(_get "${domain_env_url}")"
  _debug domain_env_response "${domain_env_response}"

-  _check_2fa_miss "${domain_env_response}"
+  if ! _check_if_2fa_missed "${domain_env_response}"; then return 1; fi

-  domain_env_success=$(printf "%s" "${domain_env_response}" | _egrep_o '"authenticated":\w*' | cut -d : -f 2)
+  domain_env_success="$(printf "%s" "${domain_env_response}" | _egrep_o '"authenticated":\w*' | cut -d : -f 2)"

  # Bail if domain environment change fails.
  if [ "${domain_env_success}" != "true" ]; then
-    _fail "    $(printf "%s" "${domain_env_response}" | _get_response_message)"
+    _err "    $(printf "%s" "${domain_env_response}" | _get_response_message)"
+    _err ""
+    return 1
  fi

  _info "    success"
@ -235,47 +249,41 @@ _domain_env() {

 _add_txt() {
  _info "  - Adding DNS TXT entry..."
-  addtxt_response=$(curl \
-    "https://my.cyon.ch/domain/dnseditor/add-record-async" \
-    -s \
-    --compressed \
-    -b "${cookiejar}" \
-    -H "X-Requested-With: XMLHttpRequest" \
-    -d "zone=${fulldomain_idn}.&ttl=900&type=TXT&value=${txtvalue}")

-  _debug addtxt_response "${addtxt_response}"
+  add_txt_url="https://my.cyon.ch/domain/dnseditor/add-record-async"
+  add_txt_data="zone=${fulldomain_idn}.&ttl=900&type=TXT&value=${txtvalue}"
+
+  add_txt_response="$(_post "$add_txt_data" "$add_txt_url")"
+  _debug add_txt_response "${add_txt_response}"

-  _check_2fa_miss "${addtxt_response}"
+  if ! _check_if_2fa_missed "${add_txt_response}"; then return 1; fi

-  addtxt_message=$(printf "%s" "${addtxt_response}" | _get_response_message)
-  addtxt_status=$(printf "%s" "${addtxt_response}" | _get_response_status)
+  add_txt_message="$(printf "%s" "${add_txt_response}" | _get_response_message)"
+  add_txt_status="$(printf "%s" "${add_txt_response}" | _get_response_status)"

  # Bail if adding TXT entry fails.
-  if [ "${addtxt_status}" != "true" ]; then
-    _fail "    ${addtxt_message}"
+  if [ "${add_txt_status}" != "true" ]; then
+    _err "    ${add_txt_message}"
+    _err ""
+    return 1
  fi

-  _info "    success"
+  _info "    success (TXT|${fulldomain_idn}.|${txtvalue})"
  _info ""
 }

 _delete_txt() {
  _info "  - Deleting DNS TXT entry..."

-  list_txt_response=$(curl \
-    "https://my.cyon.ch/domain/dnseditor/list-async" \
-    -s \
-    -b "${cookiejar}" \
-    --compressed \
-    -H "X-Requested-With: XMLHttpRequest" \
-    | sed -e 's/data-hash/\\ndata-hash/g')
+  list_txt_url="https://my.cyon.ch/domain/dnseditor/list-async"

+  list_txt_response="$(_get "${list_txt_url}" | sed -e 's/data-hash/\\ndata-hash/g')"
  _debug list_txt_response "${list_txt_response}"

-  _check_2fa_miss "${list_txt_response}"
+  if ! _check_if_2fa_missed "${list_txt_response}"; then return 1; fi

  # Find and delete all acme challenge entries for the $fulldomain.
-  _dns_entries=$(printf "%s" "$list_txt_response" | sed -n 's/data-hash=\\"\([^"]*\)\\" data-identifier=\\"\([^"]*\)\\".*/\1 \2/p')
+  _dns_entries="$(printf "%b\n" "${list_txt_response}" | sed -n 's/data-hash=\\"\([^"]*\)\\" data-identifier=\\"\([^"]*\)\\".*/\1 \2/p')"

  printf "%s" "${_dns_entries}" | while read -r _hash _identifier; do
    dns_type="$(printf "%s" "$_identifier" | cut -d'|' -f1)"
@ -285,21 +293,19 @@ _delete_txt() {
      continue
    fi

-    delete_txt_response=$(curl \
-      "https://my.cyon.ch/domain/dnseditor/delete-record-async" \
-      -s \
-      --compressed \
-      -b "${cookiejar}" \
-      -H "X-Requested-With: XMLHttpRequest" \
-      --data-urlencode "hash=${_hash}" \
-      --data-urlencode "identifier=${_identifier}")
+    hash_encoded="$(printf "%s" "${_hash}" | _urlencode_cyon)"
+    identifier_encoded="$(printf "%s" "${_identifier}" | _urlencode_cyon)"

+    delete_txt_url="https://my.cyon.ch/domain/dnseditor/delete-record-async"
+    delete_txt_data="$(printf "%s" "hash=${hash_encoded}&identifier=${identifier_encoded}")"
+
+    delete_txt_response="$(_post "$delete_txt_data" "$delete_txt_url")"
    _debug delete_txt_response "${delete_txt_response}"

-    _check_2fa_miss "${delete_txt_response}"
+    if ! _check_if_2fa_missed "${delete_txt_response}"; then return 1; fi

-    delete_txt_message=$(printf "%s" "${delete_txt_response}" | _get_response_message)
-    delete_txt_status=$(printf "%s" "${delete_txt_response}" | _get_response_status)
+    delete_txt_message="$(printf "%s" "${delete_txt_response}" | _get_response_message)"
+    delete_txt_status="$(printf "%s" "${delete_txt_response}" | _get_response_status)"

    # Skip if deleting TXT entry fails.
    if [ "${delete_txt_status}" != "true" ]; then
@ -325,23 +331,11 @@ _get_response_success() {
  _egrep_o '"onSuccess":"[^"]*"' | cut -d : -f 2 | tr -d '"'
 }

-_check_2fa_miss() {
+_check_if_2fa_missed() {
  # Did we miss the 2FA?
-  if test "${1#*multi_factor_form}" != "$1"; then
-    _fail "    Missed OTP authentication!"
-  fi
-}
-
-_fail() {
-  _err "$1"
+  if test "${1#*multi_factor_form}" != "${1}"; then
+    _err "    Missed OTP authentication!"
  _err ""
-  _cleanup
-  exit 1
-}
-
-_cleanup() {
-  _info "  - Cleanup."
-  _debug "Remove cookie jar: ${cookiejar}"
-  rm "${cookiejar}" 2>/dev/null
-  _info ""
+  return 1
+  fi
 }