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Special handling for some always-on or alias symbols

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Some symbols don't require a dependency symbol:

* Modifiers such as truncated MAC
* Always-on features such as the raw data key type
* Aliases or special values such as RSA PKCS#1v1.5 raw

I'm not convinced that all of these warrant special handling in the
script, rather than having the expected symbol defined somewhere. But
for now I prefer to minimize changes to the header files.

Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
This commit is contained in:
Gilles Peskine 2021-01-12 01:01:26 +01:00
parent 81dec0047f
commit f032fa9d94
1 changed files with 15 additions and 0 deletions
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15
tests/scripts/set_psa_test_dependencies.py
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@ -108,6 +108,14 @@ def is_systematic_dependency(dep):
return dep.startswith('PSA_WANT_')
OMITTED_SYSTEMATIC_DEPENDENCIES = frozenset([
'PSA_ALG_AEAD_WITH_TAG_LENGTH', # only a modifier
'PSA_ALG_ANY_HASH', # only meaningful in policies
'PSA_ALG_KEY_AGREEMENT', # only a way to combine algorithms
'PSA_ALG_TRUNCATED_MAC', # only a modifier
'PSA_KEY_TYPE_NONE', # always supported
'PSA_KEY_TYPE_DERIVE', # always supported
'PSA_KEY_TYPE_RAW_DATA', # always supported
# Not implemented yet: cipher-related key types and algorithms.
# Manually extracted from crypto_values.h.
'PSA_KEY_TYPE_AES',
@ -130,10 +138,17 @@ OMITTED_SYSTEMATIC_DEPENDENCIES = frozenset([
'PSA_ALG_CHACHA20_POLY1305',
])
SPECIAL_SYSTEMATIC_DEPENDENCIES = {
'PSA_ALG_ECDSA_ANY': frozenset(['PSA_WANT_ALG_ECDSA']),
'PSA_ALG_RSA_PKCS1V15_SIGN_RAW': frozenset(['PSA_WANT_ALG_RSA_PKCS1V15_SIGN']),
}
def dependencies_of_symbol(symbol):
"""Return the dependencies for a symbol that designates a cryptographic mechanism."""
if symbol in OMITTED_SYSTEMATIC_DEPENDENCIES:
return frozenset()
if symbol in SPECIAL_SYSTEMATIC_DEPENDENCIES:
return SPECIAL_SYSTEMATIC_DEPENDENCIES[symbol]
return {symbol.replace('_', '_WANT_', 1)}
def systematic_dependencies(file_name, function_name, arguments):