CaptchaConverter.groovy

CaptchaConverter.groovy

package com.berry

import com.berry.BCrypt
import grails.converters.JSON

class CaptchaController {

    def index = {

        // Generate the SALT to be used for encryption and place in session
        def captchaSalt = session.captchaSalt ?: BCrypt.gensalt()
        session.selectedCaptchaText = null
        session.captchaSalt = captchaSalt

        // Modify below for custom images
        def images = [
                'house':        'images/captchaImages/01.png',
                'key':          'images/captchaImages/04.png',
                'flag':         'images/captchaImages/06.png',
                'clock':        'images/captchaImages/15.png',
                'bug':          'images/captchaImages/16.png',
                'pen':          'images/captchaImages/19.png',
                'light bulb':   'images/captchaImages/21.png',
                'musical note': 'images/captchaImages/40.png',
                'heart':        'images/captchaImages/43.png',
                'world':        'images/captchaImages/99.png'
        ]

        // Create the image array to be returned in JSON format
        def size = images.size()
        def num = Math.min(params.numImages ? params.int('numImages') : 5, size)
        def keys = images.keySet().toList()
        def used = []
        def random = new Random()
        (1..num).each { i ->
            def idx = random.nextInt(keys.size())
            def item = keys.get(idx)
            keys.remove(idx)
            used << item
        }

        // Select the 'chosen' text to be used for authentication and place in session
        def selectedText = used[random.nextInt(used.size())]
        def hashedSelectedText = BCrypt.hashpw(selectedText, captchaSalt);
        session.selectedCaptchaText = hashedSelectedText

//        println "SELECTED: ${hashedSelectedText}"
//        println "USED: ${used.inspect()}"

        // Generate object to be returned
        def ret = [
                text: selectedText,
                images: []
        ]
        used.each { u ->
            ret['images'] << [hash: BCrypt.hashpw(u, captchaSalt), file: images[u]]
        }

        render ret as JSON
    }
}