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Tests: test_api split test_sign_verify() #1671

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Merged
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Nov 11, 2021
Merged

Tests: test_api split test_sign_verify() #1671

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21 changes: 18 additions & 3 deletions tests/test_api.py
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Original file line number Diff line number Diff line change
Expand Up @@ -203,21 +203,36 @@ def test_sign_verify(self):
with self.assertRaises(exceptions.UnsignedMetadataError):
targets_key.verify_signature(md_obj)

# Test failure on unknown scheme (securesystemslib UnsupportedAlgorithmError)
def test_verify_failures(self):
root_path = os.path.join(self.repo_dir, "metadata", "root.json")
root = Metadata[Root].from_file(root_path).signed

# Locate the timestamp public key we need from root
timestamp_keyid = next(iter(root.roles["timestamp"].keyids))
timestamp_key = root.keys[timestamp_keyid]

# Load sample metadata (timestamp)
path = os.path.join(self.repo_dir, "metadata", "timestamp.json")
md_obj = Metadata.from_file(path)

# Test failure on unknown scheme (securesystemslib
# UnsupportedAlgorithmError)
scheme = timestamp_key.scheme
timestamp_key.scheme = "foo"
with self.assertRaises(exceptions.UnsignedMetadataError):
timestamp_key.verify_signature(md_obj)
timestamp_key.scheme = scheme

# Test failure on broken public key data (securesystemslib CryptoError)
# Test failure on broken public key data (securesystemslib
# CryptoError)
public = timestamp_key.keyval["public"]
timestamp_key.keyval["public"] = "ffff"
with self.assertRaises(exceptions.UnsignedMetadataError):
timestamp_key.verify_signature(md_obj)
timestamp_key.keyval["public"] = public

# Test failure with invalid signature (securesystemslib FormatError)
# Test failure with invalid signature (securesystemslib
# FormatError)
sig = md_obj.signatures[timestamp_keyid]
correct_sig = sig.signature
sig.signature = "foo"
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