DGNum/hostapd
6
0
Fork 0
Code Issues Pull requests 1 Projects Releases Packages Wiki Activity Actions

EAP-pwd: Move EC group initialization to earlier step

Browse source 
This is needed for adding support for salted passwords.

Signed-off-by: Dan Harkins <dharkins@lounge.org>
This commit is contained in:
Dan Harkins 2018-05-25 21:40:04 +03:00 • committed by Jouni Malinen
parent b829e4b694
commit 2a5c291881
4 changed files with 26 additions and 11 deletions
Download patch file Download diff file Expand all files Collapse all files

32
src/eap_common/eap_pwd_common.c
View file

@ -81,6 +81,27 @@ static int eap_pwd_kdf(const u8 *key, size_t keylen, const u8 *label,
}
EAP_PWD_group * get_eap_pwd_group(u16 num)
{
EAP_PWD_group *grp;
grp = os_zalloc(sizeof(EAP_PWD_group));
if (!grp)
return NULL;
grp->group = crypto_ec_init(num);
if (!grp->group) {
wpa_printf(MSG_INFO, "EAP-pwd: unable to create EC group");
os_free(grp);
return NULL;
}
grp->group_num = num;
wpa_printf(MSG_INFO, "EAP-pwd: provisioned group %d", num);
return grp;
}
/*
* compute a "random" secret point on an elliptic curve based
* on the password and identities.
@ -97,12 +118,8 @@ int compute_password_element(EAP_PWD_group *grp, u16 num,
size_t primebytelen, primebitlen;
struct crypto_bignum *x_candidate = NULL, *rnd = NULL, *cofactor = NULL;
grp->pwe = NULL;
grp->group = crypto_ec_init(num);
if (!grp->group) {
wpa_printf(MSG_INFO, "EAP-pwd: unable to create EC group");
goto fail;
}
if (grp->pwe)
return -1;
cofactor = crypto_bignum_init();
grp->pwe = crypto_ec_point_init(grp->group);
@ -234,11 +251,8 @@ int compute_password_element(EAP_PWD_group *grp, u16 num,
break;
}
wpa_printf(MSG_DEBUG, "EAP-pwd: found a PWE in %d tries", ctr);
grp->group_num = num;
if (0) {
fail:
crypto_ec_deinit(grp->group);
grp->group = NULL;
crypto_ec_point_deinit(grp->pwe, 1);
grp->pwe = NULL;
ret = 1;