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Hakase
2020-03-08 13:10:50 +09:00
parent b412d79e8b
commit be29e7bcc6
274 changed files with 2778 additions and 763 deletions
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crypto/ffc/ffc_key_generate.c
+9 -2
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@@ -36,13 +36,19 @@ int ffc_generate_private_key(BN_CTX *ctx, const FFC_PARAMS *params,
int ffc_generate_private_key_fips(BN_CTX *ctx, const FFC_PARAMS *params,
int N, int s, BIGNUM *priv)
{
int ret = 0;
int ret = 0, qbits = BN_num_bits(params->q);
BIGNUM *m, *two_powN = NULL;
/* Step (2) : check range of N */
if (N < 2 * s || N > BN_num_bits(params->q))
if (N < 2 * s || N > qbits)
return 0;
/* Deal with the edge case where the value of N is not set */
if (N == 0) {
N = qbits;
s = N / 2;
}
two_powN = BN_new();
/* 2^N */
if (two_powN == NULL || !BN_lshift(two_powN, BN_value_one(), N))
@@ -50,6 +56,7 @@ int ffc_generate_private_key_fips(BN_CTX *ctx, const FFC_PARAMS *params,
/* Step (5) : M = min(2 ^ N, q) */
m = (BN_cmp(two_powN, params->q) > 0) ? params->q : two_powN;
do {
/* Steps (3, 4 & 7) : c + 1 = 1 + random[0..2^N - 1] */
if (!BN_priv_rand_range_ex(priv, two_powN, ctx)