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136 lines
3.0 KiB
Bash
Executable File
136 lines
3.0 KiB
Bash
Executable File
#! /bin/sh
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#
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# Copyright 2007. Petar Zhivkov Petrov
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# pesho.petrov@gmail.com
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#
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# $FreeBSD$
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usage() {
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echo "Usage: $0 clientName serverName"
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echo " $0 -v"
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}
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countChars() {
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_count="`echo "$1" | sed -e "s/[^$2]//g" | tr -d "\n" | wc -c`"
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return 0
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}
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readPassword() {
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while [ true ]; do
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stty -echo
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read -p "$1" _password
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stty echo
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echo ""
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countChars "$_password" ":"
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if [ $_count != 0 ]; then
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echo "Sorry, password must not contain \":\" characters"
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echo ""
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else
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break
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fi
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done
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return 0
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}
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makeSecret() {
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local clientLower="`echo "$1" | tr "[:upper:]" "[:lower:]"`"
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local serverLower="`echo "$2" | tr "[:upper:]" "[:lower:]"`"
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local secret="`md5 -qs "$clientLower:$serverLower:$3"`"
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_secret="\$md5\$$secret"
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}
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if [ $# -eq 1 -a "X$1" = "X-v" ]; then
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echo "Csup authentication key generator"
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usage
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exit
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elif [ $# -ne 2 ]; then
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usage
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exit
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fi
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clientName=$1
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serverName=$2
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#
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# Client name must contain exactly one '@' and at least one '.'.
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# It must not contain a ':'.
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#
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countChars "$clientName" "@"
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aCount=$_count
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countChars "$clientName" "."
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dotCount=$_count
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if [ $aCount -ne 1 -o $dotCount -eq 0 ]; then
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echo "Client name must have the form of an e-mail address,"
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echo "e.g., \"user@domain.com\""
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exit
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fi
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countChars "$clientName" ":"
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colonCount=$_count
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if [ $colonCount -gt 0 ]; then
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echo "Client name must not contain \":\" characters"
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exit
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fi
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#
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# Server name must not contain '@' and must have at least one '.'.
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# It also must not contain a ':'.
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#
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countChars "$serverName" "@"
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aCount=$_count
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countChars "$serverName" "."
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dotCount=$_count
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if [ $aCount != 0 -o $dotCount = 0 ]; then
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echo "Server name must be a fully-qualified domain name."
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echo "e.g., \"host.domain.com\""
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exit
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fi
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countChars "$serverName" ":"
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colonCount=$_count
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if [ $colonCount -gt 0 ]; then
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echo "Server name must not contain \":\" characters"
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exit
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fi
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#
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# Ask for password and generate secret.
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#
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while [ true ]; do
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readPassword "Enter password: "
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makeSecret "$clientName" "$serverName" "$_password"
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secret=$_secret
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readPassword "Enter same password again: "
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makeSecret "$clientName" "$serverName" "$_password"
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secret2=$_secret
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if [ "X$secret" = "X$secret2" ]; then
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break
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else
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echo "Passwords did not match. Try again."
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echo ""
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fi
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done
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echo ""
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echo "Send this line to the server administrator at $serverName:"
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echo "-------------------------------------------------------------------------------"
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echo "$clientName:$secret::"
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echo "-------------------------------------------------------------------------------"
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echo "Be sure to send it using a secure channel!"
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echo ""
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echo "Add this line to your file \"$HOME/.csup/auth\", replacing \"XXX\""
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echo "with the password you typed in:"
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echo "-------------------------------------------------------------------------------"
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echo "$serverName:$clientName:XXX:"
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echo "-------------------------------------------------------------------------------"
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echo "Make sure the file is readable and writable only by you!"
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echo ""
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