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from cryptography.hazmat.primitives import serialization as crypto_serialization
from cryptography.hazmat.primitives.asymmetric import rsa
from cryptography.hazmat.backends import default_backend as crypto_default_backend
import requests
from . import exceptions
def get_key_pair(size=2048):
key = rsa.generate_private_key(
backend=crypto_default_backend(),
public_exponent=65537,
key_size=size
)
private_key = key.private_bytes(
crypto_serialization.Encoding.PEM,
crypto_serialization.PrivateFormat.PKCS8,
crypto_serialization.NoEncryption())
public_key = key.public_key().public_bytes(
crypto_serialization.Encoding.PEM,
crypto_serialization.PublicFormat.PKCS1
)
return private_key, public_key
def get_public_key(actor_url):
"""
Given an actor_url, request it and extract publicKey data from
the response payload.
"""
response = requests.get(actor_url)
response.raise_for_status()
payload = response.json()
try:
return {
'public_key_pem': payload['publicKey']['publicKeyPem'],
'id': payload['publicKey']['id'],
'owner': payload['publicKey']['owner'],
}
except KeyError:
raise exceptions.MalformedPayload(str(payload))