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# Copyright (c) 2018 Red Hat, Inc.
# All Rights Reserved.
import datetime
import io
import ipaddress
import os
import tarfile
import time
import re
import asn1
from awx.api import serializers
from awx.api.generics import GenericAPIView, Response
from awx.api.permissions import IsSystemAdminOrAuditor
from awx.main import models
from cryptography import x509
from cryptography.hazmat.primitives import hashes, serialization
from cryptography.hazmat.primitives.asymmetric import rsa
from cryptography.x509 import DNSName, IPAddress, ObjectIdentifier, OtherName
from cryptography.x509.oid import NameOID
from django.http import HttpResponse
from django.template.loader import render_to_string
from django.utils.translation import gettext_lazy as _
from rest_framework import status
# Red Hat has an OID namespace (RHANANA). Receptor has its own designation under that.
RECEPTOR_OID = "1.3.6.1.4.1.2312.19.1"
# generate install bundle for the instance
# install bundle directory structure
# ├── install_receptor.yml (playbook)
# ├── inventory.yml
# ├── group_vars
# │ └── all.yml
# ├── receptor
# │ ├── tls
# │ │ ├── ca
# │ │ │ └── receptor-ca.crt
# │ │ ├── receptor.crt
# │ │ └── receptor.key
# │ └── work-public-key.pem
# └── requirements.yml
class InstanceInstallBundle(GenericAPIView):
name = _('Install Bundle')
model = models.Instance
serializer_class = serializers.InstanceSerializer
permission_classes = (IsSystemAdminOrAuditor,)
def get(self, request, *args, **kwargs):
instance_obj = self.get_object()
if instance_obj.node_type not in ('execution', 'hop'):
return Response(
data=dict(msg=_('Install bundle can only be generated for execution or hop nodes.')),
status=status.HTTP_400_BAD_REQUEST,
)
with io.BytesIO() as f:
with tarfile.open(fileobj=f, mode='w:gz') as tar:
# copy /etc/receptor/tls/ca/mesh-CA.crt to receptor/tls/ca in the tar file
tar.add(os.path.realpath('/etc/receptor/tls/ca/mesh-CA.crt'), arcname=f"{instance_obj.hostname}_install_bundle/receptor/tls/ca/mesh-CA.crt")
# copy /etc/receptor/work_public_key.pem to receptor/work_public_key.pem
tar.add('/etc/receptor/work_public_key.pem', arcname=f"{instance_obj.hostname}_install_bundle/receptor/work_public_key.pem")
# generate and write the receptor key to receptor/tls/receptor.key in the tar file
key, cert = generate_receptor_tls(instance_obj)
def tar_addfile(tarinfo, filecontent):
tarinfo.mtime = time.time()
tarinfo.size = len(filecontent)
tar.addfile(tarinfo, io.BytesIO(filecontent))
key_tarinfo = tarfile.TarInfo(f"{instance_obj.hostname}_install_bundle/receptor/tls/receptor.key")
tar_addfile(key_tarinfo, key)
cert_tarinfo = tarfile.TarInfo(f"{instance_obj.hostname}_install_bundle/receptor/tls/receptor.crt")
cert_tarinfo.size = len(cert)
tar_addfile(cert_tarinfo, cert)
# generate and write install_receptor.yml to the tar file
playbook = generate_playbook(instance_obj).encode('utf-8')
playbook_tarinfo = tarfile.TarInfo(f"{instance_obj.hostname}_install_bundle/install_receptor.yml")
tar_addfile(playbook_tarinfo, playbook)
# generate and write inventory.yml to the tar file
inventory_yml = generate_inventory_yml(instance_obj).encode('utf-8')
inventory_yml_tarinfo = tarfile.TarInfo(f"{instance_obj.hostname}_install_bundle/inventory.yml")
tar_addfile(inventory_yml_tarinfo, inventory_yml)
# generate and write group_vars/all.yml to the tar file
group_vars = generate_group_vars_all_yml(instance_obj).encode('utf-8')
group_vars_tarinfo = tarfile.TarInfo(f"{instance_obj.hostname}_install_bundle/group_vars/all.yml")
tar_addfile(group_vars_tarinfo, group_vars)
# generate and write requirements.yml to the tar file
requirements_yml = generate_requirements_yml().encode('utf-8')
requirements_yml_tarinfo = tarfile.TarInfo(f"{instance_obj.hostname}_install_bundle/requirements.yml")
tar_addfile(requirements_yml_tarinfo, requirements_yml)
# respond with the tarfile
f.seek(0)
response = HttpResponse(f.read(), status=status.HTTP_200_OK)
response['Content-Disposition'] = f"attachment; filename={instance_obj.hostname}_install_bundle.tar.gz"
return response
def generate_playbook(instance_obj):
playbook_yaml = render_to_string("instance_install_bundle/install_receptor.yml", context=dict(instance=instance_obj))
# convert consecutive newlines with a single newline
return re.sub(r'\n+', '\n', playbook_yaml)
def generate_requirements_yml():
return render_to_string("instance_install_bundle/requirements.yml")
def generate_inventory_yml(instance_obj):
return render_to_string("instance_install_bundle/inventory.yml", context=dict(instance=instance_obj))
def generate_group_vars_all_yml(instance_obj):
# get peers
peers = []
for addr in instance_obj.peers.all().prefetch_related('instance'):
peers.append(dict(address=addr.get_full_address(), protocol=addr.protocol))
context = dict(instance=instance_obj, peers=peers)
canonical_addr = instance_obj.canonical_address
if canonical_addr:
context['listener_port'] = canonical_addr.port
protocol = canonical_addr.protocol if canonical_addr.protocol != 'wss' else 'ws'
context['listener_protocol'] = protocol
all_yaml = render_to_string("instance_install_bundle/group_vars/all.yml", context=context)
# convert consecutive newlines with a single newline
return re.sub(r'\n+', '\n', all_yaml)
def generate_receptor_tls(instance_obj):
# generate private key for the receptor
key = rsa.generate_private_key(public_exponent=65537, key_size=2048)
# encode receptor hostname to asn1
hostname = instance_obj.hostname
encoder = asn1.Encoder()
encoder.start()
encoder.write(hostname.encode(), nr=asn1.Numbers.UTF8String)
hostname_asn1 = encoder.output()
san_params = [
DNSName(hostname),
OtherName(ObjectIdentifier(RECEPTOR_OID), hostname_asn1),
]
try:
san_params.append(IPAddress(ipaddress.IPv4Address(hostname)))
except ipaddress.AddressValueError:
pass
# generate certificate for the receptor
csr = (
x509.CertificateSigningRequestBuilder()
.subject_name(
x509.Name(
[
x509.NameAttribute(NameOID.COMMON_NAME, hostname),
]
)
)
.add_extension(
x509.SubjectAlternativeName(san_params),
critical=False,
)
.sign(key, hashes.SHA256())
)
# sign csr with the receptor ca key from /etc/receptor/ca/mesh-CA.key
with open('/etc/receptor/tls/ca/mesh-CA.key', 'rb') as f:
ca_key = serialization.load_pem_private_key(
f.read(),
password=None,
)
with open('/etc/receptor/tls/ca/mesh-CA.crt', 'rb') as f:
ca_cert = x509.load_pem_x509_certificate(f.read())
cert = (
x509.CertificateBuilder()
.subject_name(csr.subject)
.issuer_name(ca_cert.issuer)
.public_key(csr.public_key())
.serial_number(x509.random_serial_number())
.not_valid_before(datetime.datetime.utcnow())
.not_valid_after(datetime.datetime.utcnow() + datetime.timedelta(days=3650))
.add_extension(
csr.extensions.get_extension_for_class(x509.SubjectAlternativeName).value,
critical=csr.extensions.get_extension_for_class(x509.SubjectAlternativeName).critical,
)
.sign(ca_key, hashes.SHA256())
)
key = key.private_bytes(
encoding=serialization.Encoding.PEM,
format=serialization.PrivateFormat.TraditionalOpenSSL,
encryption_algorithm=serialization.NoEncryption(),
)
cert = cert.public_bytes(
encoding=serialization.Encoding.PEM,
)
return key, cert
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