X-Git-Url: http://git.plutz.net/?a=blobdiff_plain;f=cgilite%2Fusers.sh;h=f616ca02baca5d07c7199640ab436e064f4d405a;hb=HEAD;hp=873edf05ffbb72fa9729ff1eb7792c39ac2a86c3;hpb=dad2839effb7a3a43496c1bac919de8eccb0e3ae;p=serve0

diff --git a/cgilite/users.sh b/cgilite/users.sh
index 873edf0..f616ca0 100755
--- a/cgilite/users.sh
+++ b/cgilite/users.sh
@@ -1,16 +1,39 @@
 #!/bin/sh
 
+# Copyright 2021 - 2023 Paul Hänsch
+# 
+# Permission to use, copy, modify, and/or distribute this software for any
+# purpose with or without fee is hereby granted, provided that the above
+# copyright notice and this permission notice appear in all copies.
+# 
+# THE SOFTWARE IS PROVIDED “AS IS” AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
+# SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR
+# IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+
 [ -n "$include_users" ] && return 0
 include_users="$0"
 
 . "${_EXEC}/cgilite/session.sh"
 . "${_EXEC}/cgilite/storage.sh"
 
-USER_REGISTRATION="${USER_REGISTRATION:-true}"
-USER_REQUIREEMAIL="${USER_REQUIREEMAIL:-true}"
+SENDMAIL=${SENDMAIL-sendmail}
+
+USER_REGISTRATION="${USER_REGISTRATION-true}"
+USER_REQUIREEMAIL="${USER_REQUIREEMAIL-true}"
+USER_ACCOUNTPAGE="${USER_ACCOUNTPAGE}"
+
+USER_ACCOUNTEXPIRE="${USER_ACCOUNTEXPIRE:-$((86400 * 730))}"
+USER_CONFIRMEXPIRE="${USER_CONFIRMEXPIRE:-86400}"
+
+MAILFROM="${MAILDOMAIN-noreply@${HTTP_HOST%:*}}"
 
 HTTP_HOST="$(HEADER Host)"
-MAILFROM="${MAILDOMAIN:-noreply@${HTTP_HOST%:*}}"
+
+[ "$HTTPS" ] && SCHEMA=https || SCHEMA=http
 
 # == FILE FORMAT ==
 # UID	UNAME	STATUS	EMAIL	PWSALT	PWHASH	EXPIRE	DEVICES FUTUREUSE
@@ -27,6 +50,10 @@ LOCAL_USER='local \
   USER_EXPIRE USER_DEVICES USER_FUTUREUSE
 '
 
+# == TRANSLATIONS ==
+# override all functions marked with "TRANSLATION"
+# sed -n '/TRANSLATION$/,/^}/p;' <cgilite/users.sh
+
 unset USER_IDMAP
 eval "$UNSET_USER"
 
@@ -62,7 +89,7 @@ read_user() {
 update_user() {
   # internal function for user update
   local uid="$1" uname status email pwsalt pwhash expire devices futureuse
-  local UID UNAME STATUS EMAIL PWSALT PWHASH EXPIRE DEVICES FUTUREUSE
+  local UID_ UNAME STATUS EMAIL PWSALT PWHASH EXPIRE DEVICES FUTUREUSE
   local arg
 
   for arg in "$@"; do case $arg in
@@ -75,15 +102,15 @@ update_user() {
   esac; done
 
   if LOCK "$user_db"; then
-    while read -r UID UNAME STATUS EMAIL PWSALT PWHASH EXPIRE DEVICES \
+    while read -r UID_ UNAME STATUS EMAIL PWSALT PWHASH EXPIRE DEVICES \
                   FUTUREUSE; do
-    if [ "$UID" = "$uid" ]; then
+    if [ "$UID_" = "$uid" ]; then
       printf '%s	%s	%s	%s	%s	%s	%i	%s	%s\n' \
              "$uid" "$(STRING "${uname-$(UNSTRING "$UNAME")}")" \
              "${status:-${status-${STATUS}}${status+\\}}" \
              "${email:-${email-${EMAIL}}${email+\\}}" \
              "${pwsalt:-${PWSALT}}" "${pwhash:-${PWHASH}}" \
-             "${expire:-$((_DATE + 86400 * 730))}" \
+             "${expire:-$((_DATE + USER_ACCOUNTEXPIRE))}" \
              "$(STRING "${devices-$(UNSTRING "$DEVICES")}")" \
              "${FUTUREUSE:-\\}"
     elif [ "$STATUS" = pending -a ! "$EXPIRE" -ge "$_DATE" ]; then
@@ -91,7 +118,7 @@ update_user() {
       :
     else
       printf '%s	%s	%s	%s	%s	%s	%i	%s	%s\n' \
-             "$UID" "$UNAME" "$STATUS" "$EMAIL" "$PWSALT" "$PWHASH" \
+             "$UID_" "$UNAME" "$STATUS" "$EMAIL" "$PWSALT" "$PWHASH" \
              "$EXPIRE" "$DEVICES" "$FUTUREUSE"
     fi
     done <"$user_db" >"${user_db}.$$"
@@ -112,7 +139,7 @@ new_user(){
       return 1
     fi
     printf '%s	\\	%s	\\	\\	\\	%i	\\	\\\n' \
-           "$user" "pending" "$(( $_DATE + 86400 ))" >>"$user_db"
+           "$user" "pending" "$(( _DATE + USER_CONFIRMEXPIRE ))" >>"$user_db"
   else
     return 1
   fi
@@ -185,9 +212,9 @@ user_checkemail(){
 
 user_nameexist(){
   local uname="$(STRING "$1")"
-  local UID	UNAME	STATUS	EMAIL	PWSALT	PWHASH	EXPIRE	DEVICES FUTUREUSE
+  local UID_	UNAME	STATUS	EMAIL	PWSALT	PWHASH	EXPIRE	DEVICES FUTUREUSE
   [ -f "$user_db" -a -r "$user_db" ] \
-  && while read -r UID	UNAME	STATUS	EMAIL	PWSALT	PWHASH	EXPIRE	DEVICES FUTUREUSE; do
+  && while read -r UID_	UNAME	STATUS	EMAIL	PWSALT	PWHASH	EXPIRE	DEVICES FUTUREUSE; do
     [ "$EXPIRE" -gt "$_DATE" -a "$UNAME" = "$uname" ] && return 0
   done <"$user_db"
   return 1
@@ -195,9 +222,9 @@ user_nameexist(){
 
 user_emailexist(){
   local email="$(STRING "$1")"
-  local UID	UNAME	STATUS	EMAIL	PWSALT	PWHASH	EXPIRE	DEVICES FUTUREUSE
+  local UID_	UNAME	STATUS	EMAIL	PWSALT	PWHASH	EXPIRE	DEVICES FUTUREUSE
   [ -f "$user_db" -a -r "$user_db" ] \
-  && while read -r UID	UNAME	STATUS	EMAIL	PWSALT	PWHASH	EXPIRE	DEVICES FUTUREUSE; do
+  && while read -r UID_	UNAME	STATUS	EMAIL	PWSALT	PWHASH	EXPIRE	DEVICES FUTUREUSE; do
     [ "$EXPIRE" -gt "$_DATE" -a "$EMAIL" = "$email" ] && return 0
   done <"$user_db"
   return 1
@@ -209,6 +236,30 @@ user_pwhash(){
   printf '%s\n' "${hash%% *}"
 }
 
+user_register_email() {  # TRANSLATION
+  "$SENDMAIL" -t -f "$MAILFROM" <<-EOF
+	From: ${MAILFROM}
+	To: ${email}
+	Subject: Your account registration at ${HTTP_HOST%:*}
+
+	Someone tried to sign up for a user account using this email address.
+
+	You can activate your account using this link:
+
+	    ${SCHEMA}://${HTTP_HOST}${_BASE}${PATH_INFO}?user_confirm=${uid}+$(session_mac "$uid")
+
+	This registration link will expire after $((USER_CONFIRMEXPIRE / 3600)) hours.
+
+	If you did not request an account at ${HTTP_HOST%:*}, then someone else
+	probably entered your email address by accident. In this case you shoud
+	simply ignore this message and we will remove your email address from
+	our database within the next day.
+
+	This is an automatic email. Any direct reply will not be received.
+	Your Account Registration Robot.
+	EOF
+}
+
 user_register(){
   # reserve account, send registration mail
   # preliminary uid, expiration, signature
@@ -227,30 +278,10 @@ user_register(){
       REDIRECT "${_BASE}${PATH_INFO}#ERROR_EMAIL_INVALID"
     elif user_emailexist "$email"; then
       REDIRECT "${_BASE}${PATH_INFO}#ERROR_EMAIL_EXISTS"
-    elif new_user "$uid" status=pending email="$email" expire="$((_DATE + 86400))"; then
+    elif new_user "$uid" status=pending email="$email" expire="$((_DATE + USER_CONFIRMEXPIRE))"; then
       debug "Sending Activation Link:" \
-            "https://${HTTP_HOST}${_BASE}${PATH_INFO}?user_confirm=${uid}+$(session_mac "$uid")"
-      sendmail -t -f "$MAILFROM" <<-EOF
-	From: ${MAILFROM}
-	To: ${email}
-	Subject: Your account registration at ${HTTP_HOST%:*}
-
-	Someone tried to sign up for a user account using this email address.
-
-	You can activate your account using this link:
-
-	    https://${HTTP_HOST}${_BASE}${PATH_INFO}?user_confirm=${uid}+$(session_mac "$uid")
-
-	This registration link will expire after 24 hours.
-
-	If you did not request an account at ${HTTP_HOST%:*}, then someone else
-	probably entered your email address by accident. In this case you shoud
-	simply ignore this message and we will remove your email address from
-	our database within the next day.
-
-	This is an automatic email. Any direct reply will not be received.
-	Your Account Registration Robot.
-	EOF
+            "${SCHEMA}://${HTTP_HOST}${_BASE}${PATH_INFO}?user_confirm=${uid}+$(session_mac "$uid")"
+      user_register_email
       REDIRECT "${_BASE}${PATH_INFO}#USER_REGISTER_CONFIRM"
     else
       REDIRECT "${_BASE}${PATH_INFO}#ERROR_USER_NOLOCK"
@@ -265,30 +296,23 @@ user_register(){
       REDIRECT "${_BASE}${PATH_INFO}#ERROR_PW_EMPTYTOOSHORT"
     elif [ "$pw" != "$pwconfirm" ]; then
       REDIRECT "${_BASE}${PATH_INFO}#ERROR_PW_MISMATCH"
-    elif new_user "$uid" uname="$uname" status=active email="$email" password="$pw" expire="$((_DATE + 86400 * 730))"; then
+    elif new_user "$uid" uname="$uname" status=active email="$email" password="$pw" expire="$((_DATE + USER_ACCOUNTEXPIRE))"; then
       SESSION_COOKIE new
       SESSION_BIND user_id "$uid"
 
-      REDIRECT "${_BASE}${PATH_INFO}#USER_REGISTER_CONFIRM"
+      if [ "$USER_ACCOUNTPAGE" ]; then
+        REDIRECT "${USER_ACCOUNTPAGE}"
+      else
+        REDIRECT "${_BASE}${PATH_INFO}#USER_REGISTER_CONFIRM"
+      fi
     else
       REDIRECT "${_BASE}${PATH_INFO}#ERROR_USER_NOLOCK"
     fi
   fi
 }
 
-user_invite(){
-  local uid="$(timeid)"
-  local email="$(POST email |user_checkemail)"
-  local message="$(POST message)"
-
-  if [ ! "email" ]; then
-    REDIRECT "${_BASE}${PATH_INFO}#ERROR_EMAIL_INVALID"
-  elif user_emailexist "$email"; then
-    REDIRECT "${_BASE}${PATH_INFO}#ERROR_EMAIL_EXISTS"
-  elif new_user "$uid" status=pending email="$email" expire="$((_DATE + 86400))"; then
-    debug "Sending Invitation Link:" \
-          "https://${HTTP_HOST}${BASE}${PATH_INFO}?user_confirm=${uid}+$(session_mac "$uid")"
-    sendmail -t -f "$MAILFROM" <<-EOF
+user_invite_email(){  # TRANSLATION
+  "$SENDMAIL" -t -f "$MAILFROM" <<-EOF
 	From: ${MAILFROM}
 	To: ${email}
 	Subject: You have been invited to ${HTTP_HOST%:*}
@@ -299,9 +323,9 @@ user_invite(){
 
 	You can create your account using this link:
 
-	    https://${HTTP_HOST}${_BASE}${PATH_INFO}?user_confirm=${uid}+$(session_mac "$uid")
+	    ${SCHEMA}://${HTTP_HOST}${_BASE}${PATH_INFO}?user_confirm=${uid}+$(session_mac "$uid")
 
-	This registration link will expire after 24 hours.
+	This registration link will expire after $((USER_CONFIRMEXPIRE / 3600)) hours.
 
 	If you do not know what this is about, then someone else probably
 	entered your email address by accident. In this case you shoud
@@ -311,6 +335,21 @@ user_invite(){
 	This is an automatic email. Any direct reply will not be received.
 	Your Account Registration Robot.
 	EOF
+}
+
+user_invite(){
+  local uid="$(timeid)"
+  local email="$(POST email |user_checkemail)"
+  local message="$(POST message)"
+
+  if [ ! "email" ]; then
+    REDIRECT "${_BASE}${PATH_INFO}#ERROR_EMAIL_INVALID"
+  elif user_emailexist "$email"; then
+    REDIRECT "${_BASE}${PATH_INFO}#ERROR_EMAIL_EXISTS"
+  elif new_user "$uid" status=pending email="$email" expire="$((_DATE + USER_CONFIRMEXPIRE))"; then
+    debug "Sending Invitation Link:" \
+          "${SCHEMA}://${HTTP_HOST}${_BASE}${PATH_INFO}?user_confirm=${uid}+$(session_mac "$uid")"
+    user_invite_email
     REDIRECT "${_BASE}${PATH_INFO}#USER_REGISTER_CONFIRM"
   else
     REDIRECT "${_BASE}${PATH_INFO}#ERROR_USER_NOLOCK"
@@ -343,7 +382,11 @@ user_confirm(){
   elif update_user "$USER_ID" uname="$uname" status=active password="$pw"; then
     SESSION_COOKIE new
     SESSION_BIND user_id "$USER_ID"
-    REDIRECT "${_BASE}${PATH_INFO}?user_register=confirm#USER_REGISTER_CONFIRM"
+    if [ "$USER_ACCOUNTPAGE" ]; then
+      REDIRECT "${USER_ACCOUNTPAGE}"
+    else
+      REDIRECT "${_BASE}${PATH_INFO}?user_register=confirm#USER_REGISTER_CONFIRM"
+    fi
   else
     REDIRECT "${_BASE}${PATH_INFO}#ERROR_USER_NOLOCK"
   fi
@@ -353,15 +396,15 @@ user_login(){
   # set cookie
   # keep logged in - device cookie?
   # initialize new session!
-  local UID	UNAME	STATUS	EMAIL	PWSALT	PWHASH	EXPIRE	DEVICES FUTUREUSE
+  local UID_	UNAME	STATUS	EMAIL	PWSALT	PWHASH	EXPIRE	DEVICES FUTUREUSE
   local uname="$(POST uname |STRING)" pw="$(POST pw)"
 
   [ -f "$user_db" -a -r "$user_db" ] \
-  && while read -r UID	UNAME	STATUS	EMAIL	PWSALT	PWHASH	EXPIRE	DEVICES FUTUREUSE; do
+  && while read -r UID_	UNAME	STATUS	EMAIL	PWSALT	PWHASH	EXPIRE	DEVICES FUTUREUSE; do
     if [ "$UNAME" = "$uname" -o "$EMAIL" = "$uname" ]; then
       if [ "$STATUS" = active -a "$EXPIRE" -gt "$_DATE" -a "$PWHASH" = "$(user_pwhash "$PWSALT" "$pw")" ]; then
         SESSION_COOKIE new
-        SESSION_BIND user_id "$UID"
+        SESSION_BIND user_id "$UID_"
         REDIRECT "${_BASE}${PATH_INFO}#USER_LOGGED_IN"
       fi
     fi
@@ -379,9 +422,35 @@ user_logout(){
 }
 
 user_update(){
-  # passphrase, email
-  :
+  # todo: username update, email update / email confirm
+  local UID_	UNAME	STATUS	EMAIL	PWSALT	PWHASH	EXPIRE	DEVICES FUTUREUSE
+  # local uname="$(POST uname |STRING)"
+  local uid oldpw pw pwconfirm
+
+        uid="$(POST uid)"
+      oldpw="$(POST oldpw)"
+         pw="$(POST pw |grep -xE '.{6}')"
+  pwconfirm="$(POST pwconfirm)"
+
+
+  read -r UID_	UNAME	STATUS	EMAIL	PWSALT	PWHASH	EXPIRE	DEVICES FUTUREUSE <<-EOF
+	$(grep "^${uid}	" "$user_db")
+	EOF
+
+  if [ "$UID_" = "$USER_ID" -a "$PWHASH" = "$(user_pwhash "$PWSALT" "$oldpw")" ]; then
+    if [ "$pw" -a "$pw" = "$pwconfirm" ]; then
+      update_user "${uid}" password="$pw"
+      REDIRECT "${_BASE}${PATH_INFO}#UPDATE_SUCCESS"
+    else
+      REDIRECT "${_BASE}${PATH_INFO}#ERROR_PWMISMATCH"
+    fi
+  elif [ "$UID_" = "$USER_ID" ]; then
+    REDIRECT "${_BASE}${PATH_INFO}#ERROR_INVALID_AUTH_PASSWORD"
+  else
+    REDIRECT "${_BASE}${PATH_INFO}#ERROR_NOTLOGGEDIN"
+  fi
 }
+
 user_recover(){
   # send recover link
   :
@@ -399,25 +468,47 @@ read_user "$(SESSION_VAR user_id)"
   user_invite)   user_invite ;;
   user_login)    user_login ;;
   user_logout)   user_logout ;;
-  user_update)
-    :;;
+  user_update)   user_update ;;
   user_recover)
     :;;
   user_disable)
     :;;
 esac
 
-w_user_register(){
-  if [ "$(GET user_confirm)" ]; then
-    w_user_confirm
-  elif [ "$USER_REGISTRATION" != true -a -s "$user_db" ]; then
+export USER_ID USER_NAME USER_STATUS USER_EMAIL USER_PWSALT USER_PWHASH \
+       USER_EXPIRE USER_DEVICES USER_FUTUREUSE
+
+
+w_user_update(){
+  if [ ! "$USER_ID" ]; then
     cat <<-EOF
+	[div #user_update .nouser
+	This page can only be used by registered users
+	]
+	EOF
+  else
+    cat <<-EOF
+	[form #user_update method=POST
+	  [hidden "uid" "$USER_ID"]
+	  [p .username Logged in as $USER_NAME]
+	  [input type=password name=oldpw placeholder="Current Passphrase"]
+	  [input type=password name=pw placeholder="New Passphrase" pattern=".{6,}"]
+	  [input type=password name=pwconfirm placeholder="Confirm New Passphrase" pattern=".{6,}"]
+	  [submit "action" "user_update" Update Passphrase]
+	]
+	EOF
+  fi
+}
+
+w_user_register_disabled(){  # TRANSLATION
+  cat <<-EOF
 	[div #user_register .disabled
 	User Registration is disabled.
 	]
 	EOF
-  elif [ "$USER_REQUIREEMAIL" = true ]; then
-    cat <<-EOF
+}
+w_user_register_sendmail(){  # TRANSLATION
+  cat <<-EOF
 	[form #user_register .registeremail method=POST
 	  [p We will send an activation mail to your email address.
 	    You can continue the signup process when you click on the
@@ -426,90 +517,146 @@ w_user_register(){
 	  [submit "action" "user_register" Sign Up]
 	]
 	EOF
-  elif [ "$USER_REQUIREEMAIL" != true ]; then
-    cat <<-EOF
+}
+w_user_register_direct(){  # TRANSLATION
+  cat <<-EOF
 	[form #user_register .registername method=POST
-          [input name=uname placeholder="Choose Username" tooltip="Your username may contain any character but the @ sign. It must be at least 3 characters long, and it must start with a letter." pattern="^\[a-zA-Z\]\[a-zA-Z0-9 -~\]{2,127}$" autocomplete=off]
+          [input name=uname placeholder="Choose Username" tooltip="Your username may contain any character but the @ sign. It must be at least 3 characters long, and it must start with a letter." pattern="^\[\\\\p{L}\]\[\\\\p{L}0-9 -~\]{2,127}$" autocomplete=off]
 	  [input type=password name=pw placeholder="Choose Passphrase" pattern=".{6,}"]
 	  [input type=password name=pwconfirm placeholder="Confirm Passphrase" pattern=".{6,}"]
 	  [submit "action" "user_register" Sign Up]
 	]
 	EOF
-  fi
 }
 
-w_user_confirm(){
-  local UID	UNAME	STATUS	EMAIL	PWSALT	PWHASH	EXPIRE	DEVICES FUTUREUSE
-  local user_confirm="$(GET user_confirm)"
-  local uid="${user_confirm% *}" signature="${user_confirm#* }"
+w_user_register(){
+  if [ "$(GET user_confirm)" ]; then
+    w_user_confirm
+  elif [ "$USER_REGISTRATION" != true -a -s "$user_db" ]; then
+    w_user_register_disabled
+  elif [ "$USER_REQUIREEMAIL" = true ]; then
+    w_user_register_sendmail
+  elif [ "$USER_REQUIREEMAIL" != true ]; then
+    w_user_register_direct
+  fi
+}
 
-  if [ "$signature" = "$(session_mac "$uid")" ]; then
-    read -r UID	UNAME	STATUS	EMAIL	PWSALT	PWHASH	EXPIRE	DEVICES FUTUREUSE <<-EOF
-	$(grep "^${uid}	" "$user_db")
-	EOF
-    if [ "$STATUS" = pending -a "$EXPIRE" -gt "$_DATE" ]; then
-      cat <<-EOF
+w_user_confirm_proceed(){  # TRANSLATION
+  cat <<-EOF
 	[form #user_confirm method=POST
 	  [input type=hidden name=uid value="${uid}"]
 	  [input type=hidden name=signature value="${signature}"]
-	  [input disabled=disabled value="$(HTML "$EMAIL")"]
-          [input name=uname placeholder="Choose Username" tooltip="Your username may contain any character but the @ sign. It must be at least 3 characters long, and it must start with a letter." pattern="^\[a-zA-Z\]\[a-zA-Z0-9 -~\]{2,127}$" autocomplete=off]
+	  $([ "$EMAIL" != '\' ] && printf \
+	    '[input disabled=disabled value="%s" placeholder="Email"]' "$(UNSTRING "$EMAIL" |HTML)"
+	  )
+          [input name=uname placeholder="Choose Username" tooltip="Your username may contain any character but the @ sign. It must be at least 3 characters long, and it must start with a letter." pattern="^\[\\\\p{L}\]\[\\\\p{L}0-9 -~\]{2,127}$" autocomplete=off]
 	  [input type=password name=pw placeholder="Choose Passphrase" pattern=".{6,}"]
 	  [input type=password name=pwconfirm placeholder="Confirm Passphrase" pattern=".{6,}"]
 	  [submit "action" "user_confirm" Finish Registration]
 	]
 	EOF
-    else
-      cat <<-EOF
+}
+w_user_confirm_expired(){  # TRANSLATION
+  cat <<-EOF
 	[div #user_confirm .expired
 	  [p This activation link is not valid anymore.]
 	]
 	EOF
-    fi
-  else
-    cat <<-EOF
+}
+w_user_confirm_invalid(){  # TRANSLATION
+  cat <<-EOF
 	[div #user_confirm .invalid
 	  [p This activation link is invalid. Make sure you copied the whole activation link from your email and be careful not to include any line breaks.]
 	]
 	EOF
+}
+
+w_user_confirm(){
+  local UID_	UNAME	STATUS	EMAIL	PWSALT	PWHASH	EXPIRE	DEVICES FUTUREUSE
+  local user_confirm="$(GET user_confirm)"
+  local uid="${user_confirm% *}" signature="${user_confirm#* }"
+
+  if [ "$signature" = "$(session_mac "$uid")" ]; then
+    read -r UID_	UNAME	STATUS	EMAIL	PWSALT	PWHASH	EXPIRE	DEVICES FUTUREUSE <<-EOF
+	$(grep "^${uid}	" "$user_db")
+	EOF
+    if [ "$STATUS" = pending -a "$EXPIRE" -gt "$_DATE" ]; then
+      w_user_confirm_proceed
+    else
+      w_user_confirm_expired
+    fi
+  else
+    w_user_confirm_invalid
   fi
 }
 
-w_user_invite(){
-  if [ "$(GET user_confirm)" ]; then
-    w_user_confirm
-  elif [ "$USER_ID" ]; then
-    cat <<-EOF
+w_user_invite_email(){  # TRANSLATION
+  cat <<-EOF
 	[form #user_invite method=POST
 	  [input placeholder="Email Recipient" name=email autocomplete=off]
 	  [textarea name="message" placeholder="Message to recipient" . ]
 	  [submit "action" "user_invite" Send Invitation]
 	]
 	EOF
-  else
-    cat <<-EOF
+}
+w_user_invite_link(){  # TRANSLATION
+  cat <<-EOF
+	[div #user_invite .link
+          [p An anonymous user account has been set up. Send the following link to the intended user, so they may claim their account. The link will remain valid for $((USER_CONFIRMEXPIRE / 3600)) hours.]
+          [a href="$(HTML "$invlink")" . $(HTML "$invlink")]
+
+          [p [a href="#" . Set up another account]]
+	]
+	EOF
+}
+w_user_invite_deny(){  # TRANSLATION
+  cat <<-EOF
 	[div #user_invite .notallowed
 	  Only registered users may send an invitation to another user.
 	]
 	EOF
+}
+
+w_user_invite(){
+  local uid invlink
+
+  if [ "$(GET user_confirm)" ]; then
+    w_user_confirm
+  elif [ "$USER_ID" -a "$SENDMAIL" ]; then
+    w_user_invite_email
+  elif [ "$USER_ID" ]; then
+    uid="$(timeid)"
+    new_user "$uid" status=pending expire="$((_DATE + USER_CONFIRMEXPIRE))"
+    invlink="${SCHEMA}://${HTTP_HOST}${_BASE}${PATH_INFO}?user_confirm=${uid}+$(session_mac "$uid")"
+    debug "New Invitation Link: $invlink"
+    w_user_invite_link
+  else
+    w_user_invite_deny
   fi
 }
 
-w_user_login(){
-  if [ ! "$USER_ID" ]; then
-    cat <<-EOF
+w_user_login_logon(){  # TRANSLATION
+  cat <<-EOF
 	[form #user_login .login method=POST
-	  [input name=uname placeholder="Username or Email" autocomplete=off]
+	  [input name=uname placeholder="Username or Email"]
 	  [input type=password name=pw placeholder="Passphrase"]
 	  [submit "action" "user_login" Login]
 	]
 	EOF
-  elif [ "$USER_ID" ]; then
-    cat <<-EOF
+}
+w_user_login_logoff(){  # TRANSLATION
+  cat <<-EOF
 	[form #user_login .logout method=POST
 	  [p Logged in as [span . $(HTML ${USER_NAME})]]
 	  [submit "action" "user_logout" Logout]
 	]
 	EOF
+}
+
+w_user_login(){
+  if [ ! "$USER_ID" ]; then
+    w_user_login_logon
+  elif [ "$USER_ID" ]; then
+    w_user_login_logoff
   fi
 }