def test_acceptance_sign_unsign_symmetry(image_config: ImageConfig,
image_config_signed: ImageConfig):
"""Tests that sign and unsign are (mostly) symmetric operations."""
config_digest = image_config.get_config_digest()
# 1. Sign
signer = FakeSigner()
assert image_config.sign(signer) == signer.signature_value
assert image_config_signed.sign(signer) == signer.signature_value
# Previously unsigned configurations should now contain the new signature.
assert b"BEGIN FAKE SIGNATURE" in image_config.get_config()
# Previously signed configurations should now contain the original signature(s) and the new signature.
assert b"BEGIN FAKE SIGNATURE" in image_config_signed.get_config()
assert b"BEGIN PGP SIGNATURE" in image_config_signed.get_config()
# 2. Unsign
image_config.unsign()
image_config_signed.unsign()
# Configurations where we added the first signature should be reverted.
assert b"BEGIN FAKE SIGNATURE" not in image_config.get_config()
# Configurations where we appended a signature should now contain no signature(s).
assert b"BEGIN FAKE SIGNATURE" not in image_config_signed.get_config()
assert b"BEGIN PGP SIGNATURE" not in image_config_signed.get_config()
assert image_config.get_config_digest() == config_digest
def test_unsign(image_config: ImageConfig, image_config_signed: ImageConfig):
"""Test configuration unsigning for signed and unsigned configurations."""
image_config.unsign()
image_config_signed.unsign()
# Previously unsigned configurations should still contain no signature.
assert b"BEGIN FAKE SIGNATURE" not in image_config.get_config()
# Previously signed configurations should now contain no signature(s).
assert b"BEGIN FAKE SIGNATURE" not in image_config_signed.get_config()
assert b"BEGIN PGP SIGNATURE" not in image_config_signed.get_config()