eden-emu/mbedtls
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Remove ad hoc is_valid_for_signature method

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Use the new generic is_public method.

Impact on generated cases: there are new HMAC test cases for SIGN_HASH. It
was a bug that these test cases were previously not generated.

Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
This commit is contained in:
Gilles Peskine 2022-03-17 12:52:24 +01:00
parent 09dc05b880
commit fa70ced195
2 changed files with 6 additions and 19 deletions
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17
scripts/mbedtls_dev/crypto_knowledge.py
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@ -20,7 +20,7 @@ This module is entirely based on the PSA API.
import enum
import re
from typing import Dict, Iterable, Optional, Pattern, Tuple
from typing import Iterable, Optional, Tuple
from mbedtls_dev.asymmetric_key_data import ASYMMETRIC_KEY_DATA
@ -178,21 +178,6 @@ class KeyType:
return b''.join([self.DATA_BLOCK] * (length // len(self.DATA_BLOCK)) +
[self.DATA_BLOCK[:length % len(self.DATA_BLOCK)]])
KEY_TYPE_FOR_SIGNATURE = {
'PSA_KEY_USAGE_SIGN_HASH': re.compile('.*KEY_PAIR'),
'PSA_KEY_USAGE_VERIFY_HASH': re.compile('.*KEY.*')
} #type: Dict[str, Pattern]
"""Use a regexp to determine key types for which signature is possible
when using the actual usage flag.
"""
def is_valid_for_signature(self, usage: str) -> bool:
"""Determine if the key type is compatible with the specified
signitute type.
"""
# This is just temporaly solution for the implicit usage flags.
return re.match(self.KEY_TYPE_FOR_SIGNATURE[usage], self.name) is not None
def can_do(self, alg: 'Algorithm') -> bool:
"""Whether this key type can be used for operations with the given algorithm.