#!/bin/sh

# GrantAuthorizedKey.sh
# Tue Jun 16 21:26:50 PDT 2009
# Chieh Cheng
# http://www.CynosureX.com/

# GNU General Public License (GPL) Version 2, June 1991

  scriptName=`basename "$0"`

function outputError ()
{
  msg="$1"
  echo "Error: ${msg}"
}

function usage ()
{
  echo "  Usage:   ${scriptName} \"public key file\""
  echo
  echo "           On success, this script outputs the key name that can"
  echo "           be used to revoke the public key (see"
  echo "           RevokeAuthorizedKey.sh). On failure, this script outputs"
  echo "           an error message that is prefixed with \"Error:\"."
  echo "           Therefore, you can use the prefix to test for success or"
  echo "           failure."
}

  if [ $# -eq 1 ]
  then
    publicKeyFile="$1"
    keyDir="${HOME}/.ssh"
    keyFile="${keyDir}/authorized_keys"

    if [ -f "${publicKeyFile}" ]
    then
      if [ ! -d "${keyDir}" ]
      then
        mkdir "${keyDir}"
      fi

      publicKey=`cat "${publicKeyFile}" | head -1`
      keyName=`echo "${publicKey}" | Token.sh 3`

      if [ "${keyName}" = "" ]
      then
        outputError "Invalid public key!"
      else
        echo "${publicKey}" >> "${keyFile}"
        echo "${keyName}"
      fi
    else
      outputError "${publicKeyFile} not found!"
    fi
  else
    usage
  fi