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FILS: Advertise ERP domain in FILS Indication element

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Calculate the hashed realm from hostapd erp_domain configuration
parameter and add this to the FILS Indication element when ERP is
enabled.

Signed-off-by: Jouni Malinen <jouni@qca.qualcomm.com>
This commit is contained in:
Jouni Malinen 2015-09-02 16:33:42 +03:00 committed by Jouni Malinen
parent c30ed45f45
commit 94f66e8a26
3 changed files with 36 additions and 1 deletions
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13
src/ap/ieee802_11_shared.c
View file

@ -613,7 +613,11 @@ u8 * hostapd_eid_fils_indic(struct hostapd_data *hapd, u8 *eid, int hessid)
*pos++ = WLAN_EID_FILS_INDICATION;
len = pos++;
/* TODO: B0..B2: Number of Public Key Identifiers */
/* TODO: B3..B5: Number of Realm Identifiers */
if (hapd->conf->erp_domain) {
/* TODO: Support for setting multiple domain identifiers */
/* B3..B5: Number of Realm Identifiers */
fils_info |= BIT(3);
}
/* TODO: B6: FILS IP Address Configuration */
if (hapd->conf->fils_cache_id_set)
fils_info |= BIT(7);
@ -634,6 +638,13 @@ u8 * hostapd_eid_fils_indic(struct hostapd_data *hapd, u8 *eid, int hessid)
os_memcpy(pos, hapd->conf->hessid, ETH_ALEN);
pos += ETH_ALEN;
}
if (hapd->conf->erp_domain) {
u16 hash;
hash = fils_domain_name_hash(hapd->conf->erp_domain);
WPA_PUT_LE16(pos, hash);
pos += 2;
}
*len = pos - len - 1;
#endif /* CONFIG_FILS */

23
src/common/wpa_common.c
View file

@ -9,6 +9,7 @@
#include "includes.h"
#include "common.h"
#include "utils/crc32.h"
#include "crypto/md5.h"
#include "crypto/sha1.h"
#include "crypto/sha256.h"
@ -1755,3 +1756,25 @@ int wpa_select_ap_group_cipher(int wpa, int wpa_pairwise, int rsn_pairwise)
return WPA_CIPHER_CCMP_256;
return WPA_CIPHER_CCMP;
}
#ifdef CONFIG_FILS
u16 fils_domain_name_hash(const char *domain)
{
char buf[255], *wpos = buf;
const char *pos = domain;
size_t len;
u32 crc;
for (len = 0; len < sizeof(buf) && *pos; len++) {
if (isalpha(*pos) && isupper(*pos))
*wpos++ = tolower(*pos);
else
*wpos++ = *pos;
pos++;
}
crc = crc32((const u8 *) buf, len);
return crc & 0xffff;
}
#endif /* CONFIG_FILS */

1
src/common/wpa_common.h
View file

@ -455,5 +455,6 @@ int wpa_parse_cipher(const char *value);
int wpa_write_ciphers(char *start, char *end, int ciphers, const char *delim);
int wpa_select_ap_group_cipher(int wpa, int wpa_pairwise, int rsn_pairwise);
unsigned int wpa_mic_len(int akmp);
u16 fils_domain_name_hash(const char *domain);
#endif /* WPA_COMMON_H */