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SP math all: fix exponent bit count

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Only when using non-constant time implementation and modulus even.
This commit is contained in:
Sean Parkinson
2021-11-30 10:28:42 +10:00
parent 7221e06ff7
commit e5e280b175
1 changed files with 1 additions and 1 deletions
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wolfcrypt/src/sp_int.c
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@ -9285,7 +9285,7 @@ int sp_exptmod_nct(sp_int* b, sp_int* e, sp_int* m, sp_int* r)
} }
#if !defined(WOLFSSL_RSA_VERIFY_ONLY) && !defined(WOLFSSL_RSA_PUBLIC_ONLY) #if !defined(WOLFSSL_RSA_VERIFY_ONLY) && !defined(WOLFSSL_RSA_PUBLIC_ONLY)
else if (mp_iseven(m)) { else if (mp_iseven(m)) {
err = _sp_exptmod_ex(b, e, e->used, m, r); err = _sp_exptmod_ex(b, e, e->used * SP_WORD_SIZE, m, r);
} }
#endif #endif
else { else {