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sp_math: error on multiplier larger than curve order

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zd 12674
This commit is contained in:
elms
2021-08-25 14:59:51 -07:00
parent d4b0ec0705
commit be2ad82e6d
1 changed files with 5 additions and 0 deletions
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5
wolfcrypt/src/ecc.c
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@@ -3121,6 +3121,11 @@ exit:
(void)a; (void)a;
/* k can't have more bits than modulus count plus 1 */
if (mp_count_bits(k) > mp_count_bits(modulus) + 1) {
return ECC_OUT_OF_RANGE_E;
}
#ifdef WOLFSSL_HAVE_SP_ECC #ifdef WOLFSSL_HAVE_SP_ECC
#ifndef WOLFSSL_SP_NO_256 #ifndef WOLFSSL_SP_NO_256
if (mp_count_bits(modulus) == 256) { if (mp_count_bits(modulus) == 256) {