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Share common SAE and EAP-pwd functionality: random qr/qnr creation

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Use a shared helper function to create random qr/qnr values.

Signed-off-by: Jouni Malinen <jouni@codeaurora.org>
This commit is contained in:
Jouni Malinen 2019-04-25 20:18:27 +03:00 • committed by Jouni Malinen
parent 2b84ca4dd9
commit 6c9543fcb7
4 changed files with 41 additions and 55 deletions
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17
src/eap_common/eap_pwd_common.c
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@ -168,21 +168,8 @@ int compute_password_element(EAP_PWD_group *grp, u16 num,
goto fail;
/* get a random quadratic residue and nonresidue */
while (!qr || !qnr) {
if (crypto_bignum_rand(tmp1, prime) < 0)
goto fail;
res = crypto_bignum_legendre(tmp1, prime);
if (!qr && res == 1) {
qr = tmp1;
tmp1 = crypto_bignum_init();
} else if (!qnr && res == -1) {
qnr = tmp1;
tmp1 = crypto_bignum_init();
}
if (!tmp1)
goto fail;
}
if (crypto_bignum_to_bin(qr, qr_bin, sizeof(qr_bin),
if (dragonfly_get_random_qr_qnr(prime, &qr, &qnr) < 0 ||
crypto_bignum_to_bin(qr, qr_bin, sizeof(qr_bin),
primebytelen) < 0 ||
crypto_bignum_to_bin(qnr, qnr_bin, sizeof(qnr_bin),
primebytelen) < 0)