88 lines
2.6 KiB
Python
88 lines
2.6 KiB
Python
from os.path import join, exists
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from re import sub
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from cryptography.hazmat.primitives import serialization as crypto_serialization
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from cryptography.hazmat.primitives.asymmetric import rsa
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from cryptography.hazmat.backends import default_backend as crypto_default_backend
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defaults = {
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'apt': {
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'packages': {
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'opendkim': {},
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'opendkim-tools': {},
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},
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},
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'opendkim': {
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'keys': {},
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},
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}
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@metadata_reactor.provides(
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'opendkim/keys',
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)
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def keys(metadata):
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keys = {}
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for domain in metadata.get('mailserver/domains'):
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if domain in metadata.get(f'opendkim/keys'):
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continue
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pubkey_path = join(repo.path, 'data', 'dkim', f'{domain}.pubkey')
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privkey_path = join(repo.path, 'data', 'dkim', f'{domain}.privkey.enc')
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if not exists(pubkey_path) or not exists(privkey_path):
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key = rsa.generate_private_key(
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backend=crypto_default_backend(),
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public_exponent=65537,
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key_size=2048
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)
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with open(pubkey_path, 'w') as file:
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file.write(
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''.join(
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key.public_key().public_bytes(
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crypto_serialization.Encoding.PEM,
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crypto_serialization.PublicFormat.SubjectPublicKeyInfo
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).decode().split('\n')[1:-2]
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)
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)
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with open(privkey_path, 'w') as file:
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file.write(
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repo.vault.encrypt(
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key.private_bytes(
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crypto_serialization.Encoding.PEM,
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crypto_serialization.PrivateFormat.PKCS8,
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crypto_serialization.NoEncryption()
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).decode()
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)
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)
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with open(pubkey_path, 'r') as pubkey:
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with open(privkey_path, 'r') as privkey:
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keys[domain] = {
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'public': pubkey.read(),
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'private': repo.vault.decrypt(privkey.read()),
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}
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return {
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'opendkim': {
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'keys': keys,
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}
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}
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@metadata_reactor.provides(
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'dns',
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)
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def dns(metadata):
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dns = {}
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for domain, keys in metadata.get('opendkim/keys').items():
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raw_key = sub('^ssh-rsa ', '', keys['public'])
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dns[f'mail._domainkey.{domain}'] = {
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'TXT': [f'v=DKIM1; k=rsa; p={raw_key}'],
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}
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return {
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'dns': dns,
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}
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