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Bignum: Implement mbedtls_mpi_mod_raw_inv_prime() and tests

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Fixes #6023.

Signed-off-by: Tom Cosgrove <tom.cosgrove@arm.com>
This commit is contained in:
Tom Cosgrove 2022-12-08 09:44:10 +00:00
parent a7f0d7b029
commit 6129268fee
6 changed files with 187 additions and 4 deletions
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scripts/mbedtls_dev/bignum_data.py
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@ -90,8 +90,8 @@ RANDOM_1024_BIT_SEED_4_NO5 = ("53be4721f5b9e1f5acdac615bc20f6264922b9ccf469aef8"
"4708d9893a973000b54a23020fc5b043d6e4a51519d9c9cc"
"52d32377e78131c1")
# Adding 192 bit and 1024 bit numbers because these are the shortest required
# for ECC and RSA respectively.
# Adding 192 bit and 1024 bit numbers because these are the shortest required
# for ECC and RSA respectively.
INPUTS_DEFAULT = [
"0", "1", # corner cases
"2", "3", # small primes
@ -110,13 +110,21 @@ INPUTS_DEFAULT = [
# supported for now.
MODULI_DEFAULT = [
"53", # safe prime
"45", # non-prime
"45", # non-prime
SAFE_PRIME_192_BIT_SEED_1, # safe prime
RANDOM_192_BIT_SEED_2_NO4, # not a prime
SAFE_PRIME_1024_BIT_SEED_3, # safe prime
RANDOM_1024_BIT_SEED_4_NO5, # not a prime
]
# Some functions, e.g. mbedtls_mpi_mod_raw_inv_prime(), only support prime moduli.
ONLY_PRIME_MODULI = [
"53", # safe prime
"8ac72304057392b5", # 9999999997777777333 (longer, not safe, prime)
SAFE_PRIME_192_BIT_SEED_1, # safe prime
SAFE_PRIME_1024_BIT_SEED_3, # safe prime
]
def __gen_safe_prime(bits, seed):
'''
Generate a safe prime.