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The following OpenSSL public BIGNUM functions check for the BN_FLG_CONSTTIME:
bn_blind.c:
BN_BLINDING_new()
bn_exp.c:
BN_exp : must not be set for input bignums
! BN_mod_exp : SHOULD be set for any one of input bignums (only) if m is odd
BN_mod_exp_recp: must NOT be set for input bignums
BN_mod_exp_mont: SHOULD be set for any one of input bignums
BN_mod_exp_mont_word: must NOT be set for input bignums
BN_mod_exp_simple: must NOT bet set for input bignums
bn_gcd.c:
! BN_mod_inverse: SHOULD be set for any one of input bignums
bn_lib:
BN_num_bits
! BN_copy
bn_mont.c:
BN_MONT_CTX_set
bn.h:
! BN_num_bytes: Calls BN_num_bits
Relevant files and functions in the files:
Helpers.c
- BN_dup:
- BN_sub:
- BN_add_word:
- BN_mod_inverse: yes
- BN_set_word:
- BN_bin2bn:
- BN_div:
- BN_is_zero:
TpmToOsslMath:
OsslToTpmBn:
- BN_num_bytes:
- BN_bn2bin:
BigInitialized:
- BN_bin2bn:
- BN_copy:
BnModMult:
- BN_mul:
- BN_div:
BnMult:
- BN_mul:
BnDiv:
- BN_div:
BnGcd:
- BN_gcd:
BnModExp:
- BN_mod_exp: YES
BnModInverse:
- BN_mod_inverse: YES
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