Synnefo

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from django import http

from django.template import RequestContext, loader

from django.utils import simplejson as json

from django.conf import settings

from synnefo.ui.userdata import rest

from synnefo.ui.userdata.models import PublicKeyPair

from synnefo.ui.userdata.util import exportKey

from synnefo.lib.astakos import get_user

SUPPORT_GENERATE_KEYS = True

try:

    from paramiko import rsakey

    from paramiko.message import Message

except ImportError, e:

    SUPPORT_GENERATE_KEYS = False

import base64

class PublicKeyPairResourceView(rest.UserResourceView):

    model = PublicKeyPair

    exclude_fields = ["user"]

class PublicKeyPairCollectionView(rest.UserCollectionView):

    model = PublicKeyPair

    exclude_fields = ["user"]

SSH_KEY_LENGTH = getattr(settings, 'USERDATA_SSH_KEY_LENGTH', 2048)

def generate_key_pair(request):

    """

    Response to generate private/public RSA key pair

    """

    get_user(request, settings.ASTAKOS_URL)

    if request.method != "POST":

        return http.HttpResponseNotAllowed(["POST"])

    if not SUPPORT_GENERATE_KEYS:

        raise Exception("Application does not support ssh keys generation")

    if PublicKeyPair.user_limit_exceeded(request.user):

        raise http.HttpResponseServerError("SSH keys limit exceeded");

    # generate RSA key

    from Crypto import Random

    Random.atfork()

    key = rsakey.RSA.generate(SSH_KEY_LENGTH);

    # get PEM string

    pem = exportKey(key, 'PEM')

    public_data = Message()

    public_data.add_string('ssh-rsa')

    public_data.add_mpint(key.key.e)

    public_data.add_mpint(key.key.n)

    # generate public content

    public = str("ssh-rsa %s" % base64.b64encode(str(public_data)))

    data = {'private': pem, 'public': public}

    return http.HttpResponse(json.dumps(data), mimetype="application/json")

def download_private_key(request):

    """

    Return key contents

    """

    data = request.POST.get("data")

    name = request.POST.get("name", "key")

    response = http.HttpResponse(mimetype='application/x-pem-key')

    response['Content-Disposition'] = 'attachment; filename=%s' % name

    response.write(data)

    return response