Mbed-TLS/mbedtls-framework
1
0
Fork 0
mirror of https://github.com/Mbed-TLS/mbedtls-framework.git synced 2026-06-06 05:25:18 +00:00
Code Issues Packages Projects Releases Wiki Activity

Return None instead of -1 when modinv does not exist

Browse Source 
Signed-off-by: Felix Conway <felix.conway@arm.com>
This commit is contained in:
Felix Conway
2025-08-06 11:08:06 +01:00
parent d2a5b7ab33
commit aaac827669
1 changed files with 8 additions and 6 deletions
Download Patch File Download Diff File Expand all files Collapse all files
scripts/generate_bignum_tests.py
+8 -6
View File
@@ -339,13 +339,14 @@ class BignumGCDModInvOdd(BignumGCDInvModOperation):
# Only compute the modular inverse if we will get a result - negative
# and zero Ns are also present in the test data so skip them too.
if self._result_gcd == 1 and self.int_b > 1:
self._result_invmod = bignum_common.invmod_positive(self.int_a, self.int_b)
self._result_invmod = \
bignum_common.invmod_positive(self.int_a, self.int_b) # type: int | None
else:
self._result_invmod = -1 # No inverse
self._result_invmod = None # No inverse
def result(self) -> List[str]:
# The test requires us to tell it if there is no modular inverse.
if self._result_invmod == -1:
if self._result_invmod is None:
result_invmod = "no_inverse"
else:
result_invmod = "{:x}".format(self._result_invmod)
@@ -387,13 +388,14 @@ class BignumGCDModInvOddOnlyModInv(BignumGCDInvModOperation):
# Only compute the modular inverse if we will get a result - negative
# and zero Ns are also present in the test data so skip them too.
if math.gcd(self.int_a, self.int_b) == 1 and self.int_b > 1:
self._result_invmod = bignum_common.invmod_positive(self.int_a, self.int_b)
self._result_invmod = \
bignum_common.invmod_positive(self.int_a, self.int_b) # type: int | None
else:
self._result_invmod = -1 # No inverse
self._result_invmod = None # No inverse
def result(self) -> List[str]:
# The test requires us to tell it if there is no modular inverse.
if self._result_invmod == -1:
if self._result_invmod is None:
return [bignum_common.quote_str("no_inverse"), self._result_code]
return [bignum_common.quote_str("{:x}".format(self._result_invmod)), self._result_code]