152 lines
4.1 KiB
Python
Executable File
152 lines
4.1 KiB
Python
Executable File
import binascii
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import ipaddress
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import random
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import subprocess as sp
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import logging
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import requests
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from pyotp import TOTP
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from uncloud.shared import shared
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from uncloud.common.settings import settings
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logger = logging.getLogger(__name__)
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def check_otp(name, realm, token):
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try:
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data = {
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"auth_name": settings["otp"]["auth_name"],
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"auth_token": TOTP(settings["otp"]["auth_seed"]).now(),
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"auth_realm": settings["otp"]["auth_realm"],
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"name": name,
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"realm": realm,
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"token": token,
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}
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except binascii.Error as err:
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logger.error(
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"Cannot compute OTP for seed: {}".format(
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settings["otp"]["auth_seed"]
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)
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)
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return 400
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response = requests.post(
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settings["otp"]["verification_controller_url"], json=data
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)
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return response.status_code
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def resolve_vm_name(name, owner):
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"""Return UUID of Virtual Machine of name == name and owner == owner
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Input: name of vm, owner of vm.
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Output: uuid of vm if found otherwise None
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"""
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result = next(
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filter(
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lambda vm: vm.value["owner"] == owner
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and vm.value["name"] == name,
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shared.vm_pool.vms,
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),
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None,
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)
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if result:
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return result.key.split("/")[-1]
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return None
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def resolve_image_name(name, etcd_client):
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"""Return image uuid given its name and its store
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* If the provided name is not in correct format
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i.e {store_name}:{image_name} return ValueError
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* If no such image found then return KeyError
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"""
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seperator = ":"
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# Ensure, user/program passed valid name that is of type string
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try:
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store_name_and_image_name = name.split(seperator)
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"""
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Examples, where it would work and where it would raise exception
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"images:alpine" --> ["images", "alpine"]
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"images" --> ["images"] it would raise Exception as non enough value to unpack
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"images:alpine:meow" --> ["images", "alpine", "meow"] it would raise Exception
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as too many values to unpack
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"""
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store_name, image_name = store_name_and_image_name
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except Exception:
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raise ValueError(
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"Image name not in correct format i.e {store_name}:{image_name}"
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)
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images = etcd_client.get_prefix(
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settings["etcd"]["image_prefix"], value_in_json=True
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)
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# Try to find image with name == image_name and store_name == store_name
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try:
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image = next(
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filter(
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lambda im: im.value["name"] == image_name
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and im.value["store_name"] == store_name,
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images,
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)
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)
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except StopIteration:
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raise KeyError("No image with name {} found.".format(name))
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else:
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image_uuid = image.key.split("/")[-1]
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return image_uuid
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def random_bytes(num=6):
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return [random.randrange(256) for _ in range(num)]
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def generate_mac(
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uaa=False, multicast=False, oui=None, separator=":", byte_fmt="%02x"
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):
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mac = random_bytes()
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if oui:
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if type(oui) == str:
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oui = [int(chunk) for chunk in oui.split(separator)]
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mac = oui + random_bytes(num=6 - len(oui))
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else:
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if multicast:
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mac[0] |= 1 # set bit 0
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else:
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mac[0] &= ~1 # clear bit 0
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if uaa:
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mac[0] &= ~(1 << 1) # clear bit 1
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else:
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mac[0] |= 1 << 1 # set bit 1
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return separator.join(byte_fmt % b for b in mac)
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def mac2ipv6(mac, prefix):
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# only accept MACs separated by a colon
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parts = mac.split(":")
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# modify parts to match IPv6 value
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parts.insert(3, "ff")
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parts.insert(4, "fe")
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parts[0] = "%x" % (int(parts[0], 16) ^ 2)
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# format output
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ipv6_parts = [str(0)] * 4
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for i in range(0, len(parts), 2):
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ipv6_parts.append("".join(parts[i : i + 2]))
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lower_part = ipaddress.IPv6Address(":".join(ipv6_parts))
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prefix = ipaddress.IPv6Address(prefix)
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return str(prefix + int(lower_part))
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