/**
* eap_msg_alloc - Allocate a buffer for an EAP message
* @vendor: Vendor-Id (0 = IETF)
* @type: EAP type
* @len: Buffer for returning message length
* @payload_len: Payload length in bytes (data after Type)
* @code: Message Code (EAP_CODE_*)
* @identifier: Identifier
* @payload: Pointer to payload pointer that will be set to point to the
* beginning of the payload or %NULL if payload pointer is not needed
* Returns: Pointer to the allocated message buffer or %NULL on error
*
* This function can be used to allocate a buffer for an EAP message and fill
* in the EAP header. This function is automatically using expanded EAP header
* if the selected Vendor-Id is not IETF. In other words, most EAP methods do
* not need to separately select which header type to use when using this
* function to allocate the message buffers.
*/
struct eap_hdr * eap_msg_alloc(int vendor, EapType type, size_t *len,
size_t payload_len, u8 code, u8 identifier,
u8 **payload)
{
struct eap_hdr *hdr;
u8 *pos;
*len = sizeof(struct eap_hdr) + (vendor == EAP_VENDOR_IETF ? 1 : 8) +
payload_len;
hdr = malloc(*len);
if (hdr) {
hdr->code = code;
hdr->identifier = identifier;
hdr->length = host_to_be16(*len);
pos = (u8 *) (hdr + 1);
if (vendor == EAP_VENDOR_IETF) {
*pos++ = type;
} else {
*pos++ = EAP_TYPE_EXPANDED;
WPA_PUT_BE24(pos, vendor);
pos += 3;
WPA_PUT_BE32(pos, type);
pos += 4;
}
if (payload)
*payload = pos;
}
return hdr;
}
static u8 * eap_vendor_test_buildReq(struct eap_sm *sm, void *priv, int id,
size_t *reqDataLen)
{
struct eap_vendor_test_data *data = priv;
struct eap_hdr *req;
u8 *pos;
*reqDataLen = sizeof(*req) + 8 + 1;
req = VM_MALLOC(*reqDataLen);
if (req == NULL) {
wpa_printf(MSG_ERROR, "EAP-VENDOR-TEST: Failed to allocate "
"memory for request");
return NULL;
}
req->code = EAP_CODE_REQUEST;
req->identifier = id;
req->length = htons(*reqDataLen);
pos = (u8 *) (req + 1);
*pos++ = EAP_TYPE_EXPANDED;
WPA_PUT_BE24(pos, EAP_VENDOR_ID);
pos += 3;
WPA_PUT_BE32(pos, EAP_VENDOR_TYPE);
pos += 4;
*pos = data->state == INIT ? 1 : 3;
return (u8 *) req;
}
static int tls_write_client_key_exchange(struct tlsv1_client *conn,
u8 **msgpos, u8 *end)
{
u8 *pos, *rhdr, *hs_start, *hs_length;
size_t rlen;
tls_key_exchange keyx;
const struct tls_cipher_suite *suite;
suite = tls_get_cipher_suite(conn->rl.cipher_suite);
if (suite == NULL)
keyx = TLS_KEY_X_NULL;
else
keyx = suite->key_exchange;
pos = *msgpos;
wpa_printf(MSG_DEBUG, "TLSv1: Send ClientKeyExchange");
rhdr = pos;
pos += TLS_RECORD_HEADER_LEN;
/* opaque fragment[TLSPlaintext.length] */
/* Handshake */
hs_start = pos;
/* HandshakeType msg_type */
*pos++ = TLS_HANDSHAKE_TYPE_CLIENT_KEY_EXCHANGE;
/* uint24 length (to be filled) */
hs_length = pos;
pos += 3;
/* body - ClientKeyExchange */
if (keyx == TLS_KEY_X_DH_anon) {
if (tlsv1_key_x_anon_dh(conn, &pos, end) < 0)
return -1;
} else {
if (tlsv1_key_x_rsa(conn, &pos, end) < 0)
return -1;
}
WPA_PUT_BE24(hs_length, pos - hs_length - 3);
if (tlsv1_record_send(&conn->rl, TLS_CONTENT_TYPE_HANDSHAKE,
rhdr, end - rhdr, hs_start, pos - hs_start,
&rlen) < 0) {
wpa_printf(MSG_DEBUG, "TLSv1: Failed to create a record");
tls_alert(conn, TLS_ALERT_LEVEL_FATAL,
TLS_ALERT_INTERNAL_ERROR);
return -1;
}
pos = rhdr + rlen;
tls_verify_hash_add(&conn->verify, hs_start, pos - hs_start);
*msgpos = pos;
return 0;
}
static int wpa_gen_wpa_ie_osen(u8 *wpa_ie, size_t wpa_ie_len,
int pairwise_cipher, int group_cipher,
int key_mgmt)
{
u8 *pos, *len;
u32 suite;
if (wpa_ie_len < 2 + 4 + RSN_SELECTOR_LEN +
2 + RSN_SELECTOR_LEN + 2 + RSN_SELECTOR_LEN)
return -1;
pos = wpa_ie;
*pos++ = WLAN_EID_VENDOR_SPECIFIC;
len = pos++; /* to be filled */
WPA_PUT_BE24(pos, OUI_WFA);
pos += 3;
*pos++ = HS20_OSEN_OUI_TYPE;
/* Group Data Cipher Suite */
suite = wpa_cipher_to_suite(WPA_PROTO_RSN, group_cipher);
if (suite == 0) {
wpa_printf(MSG_WARNING, "Invalid group cipher (%d).",
group_cipher);
return -1;
}
RSN_SELECTOR_PUT(pos, suite);
pos += RSN_SELECTOR_LEN;
/* Pairwise Cipher Suite Count and List */
WPA_PUT_LE16(pos, 1);
pos += 2;
suite = wpa_cipher_to_suite(WPA_PROTO_RSN, pairwise_cipher);
if (suite == 0 ||
(!wpa_cipher_valid_pairwise(pairwise_cipher) &&
pairwise_cipher != WPA_CIPHER_NONE)) {
wpa_printf(MSG_WARNING, "Invalid pairwise cipher (%d).",
pairwise_cipher);
return -1;
}
RSN_SELECTOR_PUT(pos, suite);
pos += RSN_SELECTOR_LEN;
/* AKM Suite Count and List */
WPA_PUT_LE16(pos, 1);
pos += 2;
RSN_SELECTOR_PUT(pos, RSN_AUTH_KEY_MGMT_OSEN);
pos += RSN_SELECTOR_LEN;
*len = pos - len - 1;
WPA_ASSERT((size_t) (pos - wpa_ie) <= wpa_ie_len);
return pos - wpa_ie;
}
u8 * hostapd_eid_osen(struct hostapd_data *hapd, u8 *eid)
{
u8 *len;
u16 capab;
if (!hapd->conf->osen)
return eid;
*eid++ = WLAN_EID_VENDOR_SPECIFIC;
len = eid++; /* to be filled */
WPA_PUT_BE24(eid, OUI_WFA);
eid += 3;
*eid++ = HS20_OSEN_OUI_TYPE;
/* Group Data Cipher Suite */
RSN_SELECTOR_PUT(eid, RSN_CIPHER_SUITE_NO_GROUP_ADDRESSED);
eid += RSN_SELECTOR_LEN;
/* Pairwise Cipher Suite Count and List */
WPA_PUT_LE16(eid, 1);
eid += 2;
RSN_SELECTOR_PUT(eid, RSN_CIPHER_SUITE_CCMP);
eid += RSN_SELECTOR_LEN;
/* AKM Suite Count and List */
WPA_PUT_LE16(eid, 1);
eid += 2;
RSN_SELECTOR_PUT(eid, RSN_AUTH_KEY_MGMT_OSEN);
eid += RSN_SELECTOR_LEN;
/* RSN Capabilities */
capab = 0;
if (hapd->conf->wmm_enabled) {
/* 4 PTKSA replay counters when using WMM */
capab |= (RSN_NUM_REPLAY_COUNTERS_16 << 2);
}
#ifdef CONFIG_IEEE80211W
if (hapd->conf->ieee80211w != NO_MGMT_FRAME_PROTECTION) {
capab |= WPA_CAPABILITY_MFPC;
if (hapd->conf->ieee80211w == MGMT_FRAME_PROTECTION_REQUIRED)
capab |= WPA_CAPABILITY_MFPR;
}
#endif /* CONFIG_IEEE80211W */
WPA_PUT_LE16(eid, capab);
eid += 2;
*len = eid - len - 1;
return eid;
}
static int p2p_manager_disconnect(struct hostapd_data *hapd, u16 stype,
u8 minor_reason_code, const u8 *addr)
{
struct ieee80211_mgmt *mgmt;
int ret;
u8 *pos;
if (hapd->driver->send_frame == NULL)
return -1;
mgmt = os_zalloc(sizeof(*mgmt) + 100);
if (mgmt == NULL)
return -1;
wpa_dbg(hapd->msg_ctx, MSG_DEBUG, "P2P: Disconnect STA " MACSTR
" with minor reason code %u (stype=%u)",
MAC2STR(addr), minor_reason_code, stype);
mgmt->frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT, stype);
os_memcpy(mgmt->da, addr, ETH_ALEN);
os_memcpy(mgmt->sa, hapd->own_addr, ETH_ALEN);
os_memcpy(mgmt->bssid, hapd->own_addr, ETH_ALEN);
if (stype == WLAN_FC_STYPE_DEAUTH) {
mgmt->u.deauth.reason_code =
host_to_le16(WLAN_REASON_PREV_AUTH_NOT_VALID);
pos = (u8 *) (&mgmt->u.deauth.reason_code + 1);
} else {
mgmt->u.disassoc.reason_code =
host_to_le16(WLAN_REASON_PREV_AUTH_NOT_VALID);
pos = (u8 *) (&mgmt->u.disassoc.reason_code + 1);
}
*pos++ = WLAN_EID_VENDOR_SPECIFIC;
*pos++ = 4 + 3 + 1;
WPA_PUT_BE24(pos, OUI_WFA);
pos += 3;
*pos++ = P2P_OUI_TYPE;
*pos++ = P2P_ATTR_MINOR_REASON_CODE;
WPA_PUT_LE16(pos, 1);
pos += 2;
*pos++ = minor_reason_code;
ret = hapd->driver->send_frame(hapd->drv_priv, (u8 *) mgmt,
pos - (u8 *) mgmt, 1);
os_free(mgmt);
return ret < 0 ? -1 : 0;
}
u8 * hostapd_eid_p2p_manage(struct hostapd_data *hapd, u8 *eid)
{
u8 bitmap;
*eid++ = WLAN_EID_VENDOR_SPECIFIC;
*eid++ = 4 + 3 + 1;
WPA_PUT_BE24(eid, OUI_WFA);
eid += 3;
*eid++ = P2P_OUI_TYPE;
*eid++ = P2P_ATTR_MANAGEABILITY;
WPA_PUT_LE16(eid, 1);
eid += 2;
bitmap = P2P_MAN_DEVICE_MANAGEMENT;
if (hapd->conf->p2p & P2P_ALLOW_CROSS_CONNECTION)
bitmap |= P2P_MAN_CROSS_CONNECTION_PERMITTED;
bitmap |= P2P_MAN_COEXISTENCE_OPTIONAL;
*eid++ = bitmap;
return eid;
}
u8 * hostapd_eid_hs20_indication(struct hostapd_data *hapd, u8 *eid)
{
u8 conf;
if (!hapd->conf->hs20)
return eid;
*eid++ = WLAN_EID_VENDOR_SPECIFIC;
*eid++ = 7;
WPA_PUT_BE24(eid, OUI_WFA);
eid += 3;
*eid++ = HS20_INDICATION_OUI_TYPE;
conf = HS20_VERSION; /* Release Number */
conf |= HS20_ANQP_DOMAIN_ID_PRESENT;
if (hapd->conf->disable_dgaf)
conf |= HS20_DGAF_DISABLED;
*eid++ = conf;
WPA_PUT_LE16(eid, hapd->conf->anqp_domain_id);
eid += 2;
return eid;
}
static int tls_write_server_hello_done(struct tlsv1_server *conn,
u8 **msgpos, u8 *end)
{
u8 *pos, *rhdr, *hs_start, *hs_length;
size_t rlen;
pos = *msgpos;
wpa_printf(MSG_DEBUG, "TLSv1: Send ServerHelloDone");
rhdr = pos;
pos += TLS_RECORD_HEADER_LEN;
/* opaque fragment[TLSPlaintext.length] */
/* Handshake */
hs_start = pos;
/* HandshakeType msg_type */
*pos++ = TLS_HANDSHAKE_TYPE_SERVER_HELLO_DONE;
/* uint24 length (to be filled) */
hs_length = pos;
pos += 3;
/* body - ServerHelloDone (empty) */
WPA_PUT_BE24(hs_length, pos - hs_length - 3);
if (tlsv1_record_send(&conn->rl, TLS_CONTENT_TYPE_HANDSHAKE,
rhdr, end - rhdr, pos - hs_start, &rlen) < 0) {
wpa_printf(MSG_DEBUG, "TLSv1: Failed to generate a record");
tlsv1_server_alert(conn, TLS_ALERT_LEVEL_FATAL,
TLS_ALERT_INTERNAL_ERROR);
return -1;
}
pos = rhdr + rlen;
tls_verify_hash_add(&conn->verify, hs_start, pos - hs_start);
*msgpos = pos;
return 0;
}
void wpas_mbo_update_cell_capa(struct wpa_supplicant *wpa_s, u8 mbo_cell_capa)
{
u8 cell_capa[7];
if (wpa_s->conf->mbo_cell_capa == mbo_cell_capa) {
wpa_printf(MSG_DEBUG,
"MBO: Cellular capability already set to %u",
mbo_cell_capa);
return;
}
wpa_s->conf->mbo_cell_capa = mbo_cell_capa;
cell_capa[0] = WLAN_EID_VENDOR_SPECIFIC;
cell_capa[1] = 5; /* Length */
WPA_PUT_BE24(cell_capa + 2, OUI_WFA);
cell_capa[5] = MBO_ATTR_ID_CELL_DATA_CAPA;
cell_capa[6] = mbo_cell_capa;
wpas_mbo_send_wnm_notification(wpa_s, cell_capa, 7);
wpa_supplicant_set_default_scan_ies(wpa_s);
}
u8 * hostapd_eid_owe_trans(struct hostapd_data *hapd, u8 *eid,
size_t len)
{
#ifdef CONFIG_OWE
u8 *pos = eid;
size_t elen;
if (hapd->conf->owe_transition_ifname[0] &&
!hostapd_eid_owe_trans_enabled(hapd))
hostapd_owe_trans_get_info(hapd);
if (!hostapd_eid_owe_trans_enabled(hapd))
return pos;
elen = hostapd_eid_owe_trans_len(hapd);
if (len < elen) {
wpa_printf(MSG_DEBUG,
"OWE: Not enough room in the buffer for OWE IE");
return pos;
}
*pos++ = WLAN_EID_VENDOR_SPECIFIC;
*pos++ = elen - 2;
WPA_PUT_BE24(pos, OUI_WFA);
pos += 3;
*pos++ = OWE_OUI_TYPE;
os_memcpy(pos, hapd->conf->owe_transition_bssid, ETH_ALEN);
pos += ETH_ALEN;
*pos++ = hapd->conf->owe_transition_ssid_len;
os_memcpy(pos, hapd->conf->owe_transition_ssid,
hapd->conf->owe_transition_ssid_len);
pos += hapd->conf->owe_transition_ssid_len;
return pos;
#else /* CONFIG_OWE */
return eid;
#endif /* CONFIG_OWE */
}
u8 * tls_send_client_hello(struct tlsv1_client *conn, size_t *out_len)
{
u8 *hello, *end, *pos, *hs_length, *hs_start, *rhdr;
struct os_time now;
size_t len, i;
wpa_printf(MSG_DEBUG, "TLSv1: Send ClientHello");
*out_len = 0;
os_get_time(&now);
WPA_PUT_BE32(conn->client_random, now.sec);
if (os_get_random(conn->client_random + 4, TLS_RANDOM_LEN - 4)) {
wpa_printf(MSG_ERROR, "TLSv1: Could not generate "
"client_random");
return NULL;
}
wpa_hexdump(MSG_MSGDUMP, "TLSv1: client_random",
conn->client_random, TLS_RANDOM_LEN);
len = 100 + conn->num_cipher_suites * 2 + conn->client_hello_ext_len;
hello = os_malloc(len);
if (hello == NULL)
return NULL;
end = hello + len;
rhdr = hello;
pos = rhdr + TLS_RECORD_HEADER_LEN;
/* opaque fragment[TLSPlaintext.length] */
/* Handshake */
hs_start = pos;
/* HandshakeType msg_type */
*pos++ = TLS_HANDSHAKE_TYPE_CLIENT_HELLO;
/* uint24 length (to be filled) */
hs_length = pos;
pos += 3;
/* body - ClientHello */
/* ProtocolVersion client_version */
WPA_PUT_BE16(pos, TLS_VERSION);
pos += 2;
/* Random random: uint32 gmt_unix_time, opaque random_bytes */
os_memcpy(pos, conn->client_random, TLS_RANDOM_LEN);
pos += TLS_RANDOM_LEN;
/* SessionID session_id */
*pos++ = conn->session_id_len;
os_memcpy(pos, conn->session_id, conn->session_id_len);
pos += conn->session_id_len;
/* CipherSuite cipher_suites<2..2^16-1> */
WPA_PUT_BE16(pos, 2 * conn->num_cipher_suites);
pos += 2;
for (i = 0; i < conn->num_cipher_suites; i++) {
WPA_PUT_BE16(pos, conn->cipher_suites[i]);
pos += 2;
}
/* CompressionMethod compression_methods<1..2^8-1> */
*pos++ = 1;
*pos++ = TLS_COMPRESSION_NULL;
if (conn->client_hello_ext) {
os_memcpy(pos, conn->client_hello_ext,
conn->client_hello_ext_len);
pos += conn->client_hello_ext_len;
}
WPA_PUT_BE24(hs_length, pos - hs_length - 3);
tls_verify_hash_add(&conn->verify, hs_start, pos - hs_start);
if (tlsv1_record_send(&conn->rl, TLS_CONTENT_TYPE_HANDSHAKE,
rhdr, end - rhdr, pos - hs_start, out_len) < 0) {
wpa_printf(MSG_DEBUG, "TLSv1: Failed to create TLS record");
tls_alert(conn, TLS_ALERT_LEVEL_FATAL,
TLS_ALERT_INTERNAL_ERROR);
os_free(hello);
return NULL;
}
conn->state = SERVER_HELLO;
return hello;
}
static int tls_write_client_certificate_verify(struct tlsv1_client *conn,
u8 **msgpos, u8 *end)
{
u8 *pos, *rhdr, *hs_start, *hs_length, *signed_start;
size_t rlen, hlen, clen;
u8 hash[MD5_MAC_LEN + SHA1_MAC_LEN], *hpos;
enum { SIGN_ALG_RSA, SIGN_ALG_DSA } alg = SIGN_ALG_RSA;
pos = *msgpos;
wpa_printf(MSG_DEBUG, "TLSv1: Send CertificateVerify");
rhdr = pos;
pos += TLS_RECORD_HEADER_LEN;
/* Handshake */
hs_start = pos;
/* HandshakeType msg_type */
*pos++ = TLS_HANDSHAKE_TYPE_CERTIFICATE_VERIFY;
/* uint24 length (to be filled) */
hs_length = pos;
pos += 3;
/*
* RFC 2246: 7.4.3 and 7.4.8:
* Signature signature
*
* RSA:
* digitally-signed struct {
* opaque md5_hash[16];
* opaque sha_hash[20];
* };
*
* DSA:
* digitally-signed struct {
* opaque sha_hash[20];
* };
*
* The hash values are calculated over all handshake messages sent or
* received starting at ClientHello up to, but not including, this
* CertificateVerify message, including the type and length fields of
* the handshake messages.
*/
hpos = hash;
if (alg == SIGN_ALG_RSA) {
hlen = MD5_MAC_LEN;
if (conn->verify.md5_cert == NULL ||
crypto_hash_finish(conn->verify.md5_cert, hpos, &hlen) < 0)
{
tls_alert(conn, TLS_ALERT_LEVEL_FATAL,
TLS_ALERT_INTERNAL_ERROR);
conn->verify.md5_cert = NULL;
crypto_hash_finish(conn->verify.sha1_cert, NULL, NULL);
conn->verify.sha1_cert = NULL;
return -1;
}
hpos += MD5_MAC_LEN;
} else
crypto_hash_finish(conn->verify.md5_cert, NULL, NULL);
conn->verify.md5_cert = NULL;
hlen = SHA1_MAC_LEN;
if (conn->verify.sha1_cert == NULL ||
crypto_hash_finish(conn->verify.sha1_cert, hpos, &hlen) < 0) {
conn->verify.sha1_cert = NULL;
tls_alert(conn, TLS_ALERT_LEVEL_FATAL,
TLS_ALERT_INTERNAL_ERROR);
return -1;
}
conn->verify.sha1_cert = NULL;
if (alg == SIGN_ALG_RSA)
hlen += MD5_MAC_LEN;
wpa_hexdump(MSG_MSGDUMP, "TLSv1: CertificateVerify hash", hash, hlen);
/*
* RFC 2246, 4.7:
* In digital signing, one-way hash functions are used as input for a
* signing algorithm. A digitally-signed element is encoded as an
* opaque vector <0..2^16-1>, where the length is specified by the
* signing algorithm and key.
*
* In RSA signing, a 36-byte structure of two hashes (one SHA and one
* MD5) is signed (encrypted with the private key). It is encoded with
* PKCS #1 block type 0 or type 1 as described in [PKCS1].
*/
signed_start = pos; /* length to be filled */
pos += 2;
clen = end - pos;
if (conn->cred == NULL ||
crypto_private_key_sign_pkcs1(conn->cred->key, hash, hlen,
pos, &clen) < 0) {
wpa_printf(MSG_DEBUG, "TLSv1: Failed to sign hash (PKCS #1)");
tls_alert(conn, TLS_ALERT_LEVEL_FATAL,
TLS_ALERT_INTERNAL_ERROR);
return -1;
}
WPA_PUT_BE16(signed_start, clen);
pos += clen;
WPA_PUT_BE24(hs_length, pos - hs_length - 3);
if (tlsv1_record_send(&conn->rl, TLS_CONTENT_TYPE_HANDSHAKE,
rhdr, end - rhdr, pos - hs_start, &rlen) < 0) {
wpa_printf(MSG_DEBUG, "TLSv1: Failed to generate a record");
tls_alert(conn, TLS_ALERT_LEVEL_FATAL,
TLS_ALERT_INTERNAL_ERROR);
return -1;
}
pos = rhdr + rlen;
tls_verify_hash_add(&conn->verify, hs_start, pos - hs_start);
*msgpos = pos;
return 0;
}
static int tls_write_client_finished(struct tlsv1_client *conn,
u8 **msgpos, u8 *end)
{
u8 *pos, *hs_start;
size_t rlen, hlen;
u8 verify_data[1 + 3 + TLS_VERIFY_DATA_LEN];
u8 hash[MD5_MAC_LEN + SHA1_MAC_LEN];
wpa_printf(MSG_DEBUG, "TLSv1: Send Finished");
/* Encrypted Handshake Message: Finished */
hlen = MD5_MAC_LEN;
if (conn->verify.md5_client == NULL ||
crypto_hash_finish(conn->verify.md5_client, hash, &hlen) < 0) {
tls_alert(conn, TLS_ALERT_LEVEL_FATAL,
TLS_ALERT_INTERNAL_ERROR);
conn->verify.md5_client = NULL;
crypto_hash_finish(conn->verify.sha1_client, NULL, NULL);
conn->verify.sha1_client = NULL;
return -1;
}
conn->verify.md5_client = NULL;
hlen = SHA1_MAC_LEN;
if (conn->verify.sha1_client == NULL ||
crypto_hash_finish(conn->verify.sha1_client, hash + MD5_MAC_LEN,
&hlen) < 0) {
conn->verify.sha1_client = NULL;
tls_alert(conn, TLS_ALERT_LEVEL_FATAL,
TLS_ALERT_INTERNAL_ERROR);
return -1;
}
conn->verify.sha1_client = NULL;
if (tls_prf(conn->master_secret, TLS_MASTER_SECRET_LEN,
"client finished", hash, MD5_MAC_LEN + SHA1_MAC_LEN,
verify_data + 1 + 3, TLS_VERIFY_DATA_LEN)) {
wpa_printf(MSG_DEBUG, "TLSv1: Failed to generate verify_data");
tls_alert(conn, TLS_ALERT_LEVEL_FATAL,
TLS_ALERT_INTERNAL_ERROR);
return -1;
}
wpa_hexdump_key(MSG_DEBUG, "TLSv1: verify_data (client)",
verify_data + 1 + 3, TLS_VERIFY_DATA_LEN);
/* Handshake */
pos = hs_start = verify_data;
/* HandshakeType msg_type */
*pos++ = TLS_HANDSHAKE_TYPE_FINISHED;
/* uint24 length */
WPA_PUT_BE24(pos, TLS_VERIFY_DATA_LEN);
pos += 3;
pos += TLS_VERIFY_DATA_LEN; /* verify_data already in place */
tls_verify_hash_add(&conn->verify, hs_start, pos - hs_start);
if (tlsv1_record_send(&conn->rl, TLS_CONTENT_TYPE_HANDSHAKE,
*msgpos, end - *msgpos, hs_start, pos - hs_start,
&rlen) < 0) {
wpa_printf(MSG_DEBUG, "TLSv1: Failed to create a record");
tls_alert(conn, TLS_ALERT_LEVEL_FATAL,
TLS_ALERT_INTERNAL_ERROR);
return -1;
}
*msgpos += rlen;
return 0;
}
static int tls_write_server_hello(struct tlsv1_server *conn,
u8 **msgpos, u8 *end)
{
u8 *pos, *rhdr, *hs_start, *hs_length;
struct os_time now;
size_t rlen;
pos = *msgpos;
wpa_printf(MSG_DEBUG, "TLSv1: Send ServerHello");
rhdr = pos;
pos += TLS_RECORD_HEADER_LEN;
os_get_time(&now);
WPA_PUT_BE32(conn->server_random, now.sec);
if (os_get_random(conn->server_random + 4, TLS_RANDOM_LEN - 4)) {
wpa_printf(MSG_ERROR, "TLSv1: Could not generate "
"server_random");
return -1;
}
wpa_hexdump(MSG_MSGDUMP, "TLSv1: server_random",
conn->server_random, TLS_RANDOM_LEN);
conn->session_id_len = TLS_SESSION_ID_MAX_LEN;
if (os_get_random(conn->session_id, conn->session_id_len)) {
wpa_printf(MSG_ERROR, "TLSv1: Could not generate "
"session_id");
return -1;
}
wpa_hexdump(MSG_MSGDUMP, "TLSv1: session_id",
conn->session_id, conn->session_id_len);
/* opaque fragment[TLSPlaintext.length] */
/* Handshake */
hs_start = pos;
/* HandshakeType msg_type */
*pos++ = TLS_HANDSHAKE_TYPE_SERVER_HELLO;
/* uint24 length (to be filled) */
hs_length = pos;
pos += 3;
/* body - ServerHello */
/* ProtocolVersion server_version */
WPA_PUT_BE16(pos, TLS_VERSION);
pos += 2;
/* Random random: uint32 gmt_unix_time, opaque random_bytes */
os_memcpy(pos, conn->server_random, TLS_RANDOM_LEN);
pos += TLS_RANDOM_LEN;
/* SessionID session_id */
*pos++ = conn->session_id_len;
os_memcpy(pos, conn->session_id, conn->session_id_len);
pos += conn->session_id_len;
/* CipherSuite cipher_suite */
WPA_PUT_BE16(pos, conn->cipher_suite);
pos += 2;
/* CompressionMethod compression_method */
*pos++ = TLS_COMPRESSION_NULL;
if (conn->session_ticket && conn->session_ticket_cb) {
int res = conn->session_ticket_cb(
conn->session_ticket_cb_ctx,
conn->session_ticket, conn->session_ticket_len,
conn->client_random, conn->server_random,
conn->master_secret);
if (res < 0) {
wpa_printf(MSG_DEBUG, "TLSv1: SessionTicket callback "
"indicated failure");
tlsv1_server_alert(conn, TLS_ALERT_LEVEL_FATAL,
TLS_ALERT_HANDSHAKE_FAILURE);
return -1;
}
conn->use_session_ticket = res;
if (conn->use_session_ticket) {
if (tlsv1_server_derive_keys(conn, NULL, 0) < 0) {
wpa_printf(MSG_DEBUG, "TLSv1: Failed to "
"derive keys");
tlsv1_server_alert(conn, TLS_ALERT_LEVEL_FATAL,
TLS_ALERT_INTERNAL_ERROR);
return -1;
}
}
/*
* RFC 4507 specifies that server would include an empty
* SessionTicket extension in ServerHello and a
* NewSessionTicket message after the ServerHello. However,
* EAP-FAST (RFC 4851), i.e., the only user of SessionTicket
* extension at the moment, does not use such extensions.
*
* TODO: Add support for configuring RFC 4507 behavior and make
* EAP-FAST disable it.
*/
}
WPA_PUT_BE24(hs_length, pos - hs_length - 3);
tls_verify_hash_add(&conn->verify, hs_start, pos - hs_start);
if (tlsv1_record_send(&conn->rl, TLS_CONTENT_TYPE_HANDSHAKE,
rhdr, end - rhdr, pos - hs_start, &rlen) < 0) {
wpa_printf(MSG_DEBUG, "TLSv1: Failed to create TLS record");
tlsv1_server_alert(conn, TLS_ALERT_LEVEL_FATAL,
TLS_ALERT_INTERNAL_ERROR);
return -1;
}
pos = rhdr + rlen;
*msgpos = pos;
return 0;
}
static int tls_write_server_certificate(struct tlsv1_server *conn,
u8 **msgpos, u8 *end)
{
u8 *pos, *rhdr, *hs_start, *hs_length, *cert_start;
size_t rlen;
struct x509_certificate *cert;
const struct tls_cipher_suite *suite;
suite = tls_get_cipher_suite(conn->rl.cipher_suite);
if (suite && suite->key_exchange == TLS_KEY_X_DH_anon) {
wpa_printf(MSG_DEBUG, "TLSv1: Do not send Certificate when "
"using anonymous DH");
return 0;
}
pos = *msgpos;
wpa_printf(MSG_DEBUG, "TLSv1: Send Certificate");
rhdr = pos;
pos += TLS_RECORD_HEADER_LEN;
/* opaque fragment[TLSPlaintext.length] */
/* Handshake */
hs_start = pos;
/* HandshakeType msg_type */
*pos++ = TLS_HANDSHAKE_TYPE_CERTIFICATE;
/* uint24 length (to be filled) */
hs_length = pos;
pos += 3;
/* body - Certificate */
/* uint24 length (to be filled) */
cert_start = pos;
pos += 3;
cert = conn->cred->cert;
while (cert) {
if (pos + 3 + cert->cert_len > end) {
wpa_printf(MSG_DEBUG, "TLSv1: Not enough buffer space "
"for Certificate (cert_len=%lu left=%lu)",
(unsigned long) cert->cert_len,
(unsigned long) (end - pos));
tlsv1_server_alert(conn, TLS_ALERT_LEVEL_FATAL,
TLS_ALERT_INTERNAL_ERROR);
return -1;
}
WPA_PUT_BE24(pos, cert->cert_len);
pos += 3;
os_memcpy(pos, cert->cert_start, cert->cert_len);
pos += cert->cert_len;
if (x509_certificate_self_signed(cert))
break;
cert = x509_certificate_get_subject(conn->cred->trusted_certs,
&cert->issuer);
}
if (cert == conn->cred->cert || cert == NULL) {
/*
* Server was not configured with all the needed certificates
* to form a full certificate chain. The client may fail to
* validate the chain unless it is configured with all the
* missing CA certificates.
*/
wpa_printf(MSG_DEBUG, "TLSv1: Full server certificate chain "
"not configured - validation may fail");
}
WPA_PUT_BE24(cert_start, pos - cert_start - 3);
WPA_PUT_BE24(hs_length, pos - hs_length - 3);
if (tlsv1_record_send(&conn->rl, TLS_CONTENT_TYPE_HANDSHAKE,
rhdr, end - rhdr, pos - hs_start, &rlen) < 0) {
wpa_printf(MSG_DEBUG, "TLSv1: Failed to generate a record");
tlsv1_server_alert(conn, TLS_ALERT_LEVEL_FATAL,
TLS_ALERT_INTERNAL_ERROR);
return -1;
}
pos = rhdr + rlen;
tls_verify_hash_add(&conn->verify, hs_start, pos - hs_start);
*msgpos = pos;
return 0;
}
static int eap_gpsk_derive_keys_aes(const u8 *psk, size_t psk_len,
const u8 *seed, size_t seed_len,
u8 *msk, u8 *emsk, u8 *sk, size_t *sk_len,
u8 *pk, size_t *pk_len)
{
#define EAP_GPSK_SK_LEN_AES 16
#define EAP_GPSK_PK_LEN_AES 16
u8 zero_string[1], mk[32], *pos, *data;
u8 kdf_out[EAP_MSK_LEN + EAP_EMSK_LEN + EAP_GPSK_SK_LEN_AES +
EAP_GPSK_PK_LEN_AES];
size_t data_len;
/*
* inputString = RAND_Client || ID_Client || RAND_Server || ID_Server
* (= seed)
* KS = 16, PL = psk_len, CSuite_Sel = 0x000000 0x000001
* MK = GKDF-32 (0x00, PL || PSK || CSuite_Sel || inputString)
* MSK = GKDF-160 (MK, inputString)[0..63]
* EMSK = GKDF-160 (MK, inputString)[64..127]
* SK = GKDF-160 (MK, inputString)[128..143]
* PK = GKDF-160 (MK, inputString)[144..159]
* MID = GKDF-16(0x00, "Method ID" || EAP_Method_Type || CSuite_Sel ||
* inputString)
* Hash-Function = SHA-1 (see [RFC3174])
* hashlen = 20 octets (160 bits)
*/
os_memset(zero_string, 0, sizeof(zero_string));
data_len = 2 + psk_len + 6 + seed_len;
data = os_malloc(data_len);
if (data == NULL)
return -1;
pos = data;
WPA_PUT_BE16(pos, psk_len);
pos += 2;
os_memcpy(pos, psk, psk_len);
pos += psk_len;
WPA_PUT_BE24(pos, 0); /* CSuite/Vendor = IETF */
pos += 3;
WPA_PUT_BE24(pos, EAP_GPSK_CIPHER_AES); /* CSuite/Specifier */
pos += 3;
os_memcpy(pos, seed, seed_len); /* inputString */
wpa_hexdump_key(MSG_DEBUG, "EAP-GPSK: Data to MK derivation (AES)",
data, data_len);
if (eap_gpsk_gkdf(zero_string, sizeof(zero_string), data, data_len,
mk, sizeof(mk)) < 0) {
os_free(data);
return -1;
}
os_free(data);
wpa_hexdump_key(MSG_DEBUG, "EAP-GPSK: MK", mk, sizeof(mk));
if (eap_gpsk_gkdf(mk, sizeof(mk), seed, seed_len,
kdf_out, sizeof(kdf_out)) < 0)
return -1;
pos = kdf_out;
wpa_hexdump_key(MSG_DEBUG, "EAP-GPSK: MSK", pos, EAP_MSK_LEN);
os_memcpy(msk, pos, EAP_MSK_LEN);
pos += EAP_MSK_LEN;
wpa_hexdump_key(MSG_DEBUG, "EAP-GPSK: EMSK", pos, EAP_EMSK_LEN);
os_memcpy(emsk, pos, EAP_EMSK_LEN);
pos += EAP_EMSK_LEN;
wpa_hexdump_key(MSG_DEBUG, "EAP-GPSK: SK", pos, EAP_GPSK_SK_LEN_AES);
os_memcpy(sk, pos, EAP_GPSK_SK_LEN_AES);
*sk_len = EAP_GPSK_SK_LEN_AES;
pos += EAP_GPSK_SK_LEN_AES;
wpa_hexdump_key(MSG_DEBUG, "EAP-GPSK: PK", pos, EAP_GPSK_PK_LEN_AES);
os_memcpy(pk, pos, EAP_GPSK_PK_LEN_AES);
*pk_len = EAP_GPSK_PK_LEN_AES;
return 0;
}
static int tls_write_server_key_exchange(struct tlsv1_server *conn,
u8 **msgpos, u8 *end)
{
tls_key_exchange keyx;
const struct tls_cipher_suite *suite;
#ifdef EAP_FAST
u8 *pos, *rhdr, *hs_start, *hs_length;
size_t rlen;
u8 *dh_ys;
size_t dh_ys_len;
#endif /* EAP_FAST */
suite = tls_get_cipher_suite(conn->rl.cipher_suite);
if (suite == NULL)
keyx = TLS_KEY_X_NULL;
else
keyx = suite->key_exchange;
if (!tls_server_key_exchange_allowed(conn->rl.cipher_suite)) {
wpa_printf(MSG_DEBUG, "TLSv1: No ServerKeyExchange needed");
return 0;
}
if (keyx != TLS_KEY_X_DH_anon) {
/* TODO? */
wpa_printf(MSG_DEBUG, "TLSv1: ServerKeyExchange not yet "
"supported with key exchange type %d", keyx);
return -1;
}
#ifdef EAP_FAST
if (conn->cred == NULL || conn->cred->dh_p == NULL ||
conn->cred->dh_g == NULL) {
wpa_printf(MSG_DEBUG, "TLSv1: No DH parameters available for "
"ServerKeyExhcange");
return -1;
}
os_free(conn->dh_secret);
conn->dh_secret_len = conn->cred->dh_p_len;
conn->dh_secret = os_malloc(conn->dh_secret_len);
if (conn->dh_secret == NULL) {
wpa_printf(MSG_DEBUG, "TLSv1: Failed to allocate "
"memory for secret (Diffie-Hellman)");
tlsv1_server_alert(conn, TLS_ALERT_LEVEL_FATAL,
TLS_ALERT_INTERNAL_ERROR);
return -1;
}
if (os_get_random(conn->dh_secret, conn->dh_secret_len)) {
wpa_printf(MSG_DEBUG, "TLSv1: Failed to get random "
"data for Diffie-Hellman");
tlsv1_server_alert(conn, TLS_ALERT_LEVEL_FATAL,
TLS_ALERT_INTERNAL_ERROR);
os_free(conn->dh_secret);
conn->dh_secret = NULL;
return -1;
}
if (os_memcmp(conn->dh_secret, conn->cred->dh_p, conn->dh_secret_len) >
0)
conn->dh_secret[0] = 0; /* make sure secret < p */
pos = conn->dh_secret;
while (pos + 1 < conn->dh_secret + conn->dh_secret_len && *pos == 0)
pos++;
if (pos != conn->dh_secret) {
os_memmove(conn->dh_secret, pos,
conn->dh_secret_len - (pos - conn->dh_secret));
conn->dh_secret_len -= pos - conn->dh_secret;
}
wpa_hexdump_key(MSG_DEBUG, "TLSv1: DH server's secret value",
conn->dh_secret, conn->dh_secret_len);
/* Ys = g^secret mod p */
dh_ys_len = conn->cred->dh_p_len;
dh_ys = os_malloc(dh_ys_len);
if (dh_ys == NULL) {
wpa_printf(MSG_DEBUG, "TLSv1: Failed to allocate memory for "
"Diffie-Hellman");
tlsv1_server_alert(conn, TLS_ALERT_LEVEL_FATAL,
TLS_ALERT_INTERNAL_ERROR);
return -1;
}
if (crypto_mod_exp(conn->cred->dh_g, conn->cred->dh_g_len,
conn->dh_secret, conn->dh_secret_len,
conn->cred->dh_p, conn->cred->dh_p_len,
dh_ys, &dh_ys_len)) {
tlsv1_server_alert(conn, TLS_ALERT_LEVEL_FATAL,
TLS_ALERT_INTERNAL_ERROR);
os_free(dh_ys);
return -1;
}
wpa_hexdump(MSG_DEBUG, "TLSv1: DH Ys (server's public value)",
dh_ys, dh_ys_len);
/*
* struct {
* select (KeyExchangeAlgorithm) {
* case diffie_hellman:
* ServerDHParams params;
* Signature signed_params;
* case rsa:
* ServerRSAParams params;
* Signature signed_params;
* };
* } ServerKeyExchange;
*
* struct {
* opaque dh_p<1..2^16-1>;
* opaque dh_g<1..2^16-1>;
* opaque dh_Ys<1..2^16-1>;
* } ServerDHParams;
*/
pos = *msgpos;
wpa_printf(MSG_DEBUG, "TLSv1: Send ServerKeyExchange");
rhdr = pos;
pos += TLS_RECORD_HEADER_LEN;
/* opaque fragment[TLSPlaintext.length] */
/* Handshake */
hs_start = pos;
/* HandshakeType msg_type */
*pos++ = TLS_HANDSHAKE_TYPE_SERVER_KEY_EXCHANGE;
/* uint24 length (to be filled) */
hs_length = pos;
pos += 3;
/* body - ServerDHParams */
/* dh_p */
if (pos + 2 + conn->cred->dh_p_len > end) {
wpa_printf(MSG_DEBUG, "TLSv1: Not enough buffer space for "
"dh_p");
tlsv1_server_alert(conn, TLS_ALERT_LEVEL_FATAL,
TLS_ALERT_INTERNAL_ERROR);
os_free(dh_ys);
return -1;
}
WPA_PUT_BE16(pos, conn->cred->dh_p_len);
pos += 2;
os_memcpy(pos, conn->cred->dh_p, conn->cred->dh_p_len);
pos += conn->cred->dh_p_len;
/* dh_g */
if (pos + 2 + conn->cred->dh_g_len > end) {
wpa_printf(MSG_DEBUG, "TLSv1: Not enough buffer space for "
"dh_g");
tlsv1_server_alert(conn, TLS_ALERT_LEVEL_FATAL,
TLS_ALERT_INTERNAL_ERROR);
os_free(dh_ys);
return -1;
}
WPA_PUT_BE16(pos, conn->cred->dh_g_len);
pos += 2;
os_memcpy(pos, conn->cred->dh_g, conn->cred->dh_g_len);
pos += conn->cred->dh_g_len;
/* dh_Ys */
if (pos + 2 + dh_ys_len > end) {
wpa_printf(MSG_DEBUG, "TLSv1: Not enough buffer space for "
"dh_Ys");
tlsv1_server_alert(conn, TLS_ALERT_LEVEL_FATAL,
TLS_ALERT_INTERNAL_ERROR);
os_free(dh_ys);
return -1;
}
WPA_PUT_BE16(pos, dh_ys_len);
pos += 2;
os_memcpy(pos, dh_ys, dh_ys_len);
pos += dh_ys_len;
os_free(dh_ys);
WPA_PUT_BE24(hs_length, pos - hs_length - 3);
if (tlsv1_record_send(&conn->rl, TLS_CONTENT_TYPE_HANDSHAKE,
rhdr, end - rhdr, pos - hs_start, &rlen) < 0) {
wpa_printf(MSG_DEBUG, "TLSv1: Failed to generate a record");
tlsv1_server_alert(conn, TLS_ALERT_LEVEL_FATAL,
TLS_ALERT_INTERNAL_ERROR);
return -1;
}
pos = rhdr + rlen;
tls_verify_hash_add(&conn->verify, hs_start, pos - hs_start);
*msgpos = pos;
return 0;
#else /* EAP_FAST */
return -1;
#endif /* EAP_FAST */
}
static u8 * eap_sake_build_msg(struct eap_sake_data *data, u8 **payload,
int id, size_t *length, u8 subtype)
{
struct eap_sake_hdr *req;
struct eap_sake_exp_hdr *ereq;
size_t pad;
u8 *msg;
*length += data->expanded_eap ? sizeof(struct eap_sake_exp_hdr) :
sizeof(struct eap_sake_hdr);
/* Pad to 32-bit boundary; minimum pad length is 2. */
pad = *length % 4;
switch (pad) {
case 1:
pad = 3;
break;
case 2:
pad = 2;
break;
case 3:
pad = 5;
break;
default:
pad = 0;
break;
}
*length += pad;
msg = wpa_zalloc(*length);
if (msg == NULL) {
wpa_printf(MSG_ERROR, "EAP-SAKE: Failed to allocate memory "
"request");
return NULL;
}
if (data->expanded_eap) {
ereq = (struct eap_sake_exp_hdr *) msg;
ereq->code = EAP_CODE_RESPONSE;
ereq->identifier = id;
ereq->length = htons((u16) *length);
ereq->type = EAP_TYPE_EXPANDED;
WPA_PUT_BE24(ereq->vendor_id, EAP_VENDOR_IETF);
WPA_PUT_BE32(ereq->vendor_type, EAP_TYPE_SAKE);
ereq->pad = 0;
ereq->version = EAP_SAKE_VERSION;
ereq->session_id = data->session_id;
ereq->subtype = subtype;
*payload = (u8 *) (ereq + 1);
} else {
req = (struct eap_sake_hdr *) msg;
req->code = EAP_CODE_RESPONSE;
req->identifier = id;
req->length = htons((u16) *length);
req->type = EAP_TYPE_SAKE;
req->version = EAP_SAKE_VERSION;
req->session_id = data->session_id;
req->subtype = subtype;
*payload = (u8 *) (req + 1);
}
if (pad) {
u8 *pos = &msg[*length - pad];
*pos++ = EAP_SAKE_AT_PADDING;
*pos++ = pad;
}
return msg;
}
static int tls_write_server_certificate_request(struct tlsv1_server *conn,
u8 **msgpos, u8 *end)
{
u8 *pos, *rhdr, *hs_start, *hs_length;
size_t rlen;
if (!conn->verify_peer) {
wpa_printf(MSG_DEBUG, "TLSv1: No CertificateRequest needed");
return 0;
}
pos = *msgpos;
wpa_printf(MSG_DEBUG, "TLSv1: Send CertificateRequest");
rhdr = pos;
pos += TLS_RECORD_HEADER_LEN;
/* opaque fragment[TLSPlaintext.length] */
/* Handshake */
hs_start = pos;
/* HandshakeType msg_type */
*pos++ = TLS_HANDSHAKE_TYPE_CERTIFICATE_REQUEST;
/* uint24 length (to be filled) */
hs_length = pos;
pos += 3;
/* body - CertificateRequest */
/*
* enum {
* rsa_sign(1), dss_sign(2), rsa_fixed_dh(3), dss_fixed_dh(4),
* (255)
* } ClientCertificateType;
* ClientCertificateType certificate_types<1..2^8-1>
*/
*pos++ = 1;
*pos++ = 1; /* rsa_sign */
/*
* opaque DistinguishedName<1..2^16-1>
* DistinguishedName certificate_authorities<3..2^16-1>
*/
/* TODO: add support for listing DNs for trusted CAs */
WPA_PUT_BE16(pos, 0);
pos += 2;
WPA_PUT_BE24(hs_length, pos - hs_length - 3);
if (tlsv1_record_send(&conn->rl, TLS_CONTENT_TYPE_HANDSHAKE,
rhdr, end - rhdr, pos - hs_start, &rlen) < 0) {
wpa_printf(MSG_DEBUG, "TLSv1: Failed to generate a record");
tlsv1_server_alert(conn, TLS_ALERT_LEVEL_FATAL,
TLS_ALERT_INTERNAL_ERROR);
return -1;
}
pos = rhdr + rlen;
tls_verify_hash_add(&conn->verify, hs_start, pos - hs_start);
*msgpos = pos;
return 0;
}
static u8 * eap_gpsk_process_gpsk_1(struct eap_sm *sm,
struct eap_gpsk_data *data,
struct eap_method_ret *ret,
const u8 *reqData, size_t reqDataLen,
const u8 *payload, size_t payload_len,
size_t *respDataLen)
{
size_t len, csuite_list_len, miclen;
struct eap_hdr *resp;
u8 *rpos, *start;
const u8 *csuite_list, *pos, *end;
const struct eap_hdr *req;
struct eap_gpsk_csuite *csuite;
u16 alen;
int i, count;
if (data->state != GPSK_1) {
ret->ignore = TRUE;
return NULL;
}
wpa_printf(MSG_DEBUG, "EAP-GPSK: Received Request/GPSK-1");
req = (const struct eap_hdr *) reqData;
pos = payload;
end = payload + payload_len;
if (end - pos < 2) {
wpa_printf(MSG_DEBUG, "EAP-GPSK: Too short GPSK-1 packet");
return NULL;
}
alen = WPA_GET_BE16(pos);
pos += 2;
if (end - pos < alen) {
wpa_printf(MSG_DEBUG, "EAP-GPSK: ID_Server overflow");
return NULL;
}
os_free(data->id_server);
data->id_server = os_malloc(alen);
if (data->id_server == NULL) {
wpa_printf(MSG_DEBUG, "EAP-GPSK: No memory for ID_Server");
return NULL;
}
os_memcpy(data->id_server, pos, alen);
data->id_server_len = alen;
wpa_hexdump_ascii(MSG_DEBUG, "EAP-GPSK: ID_Server",
data->id_server, data->id_server_len);
pos += alen;
if (end - pos < EAP_GPSK_RAND_LEN) {
wpa_printf(MSG_DEBUG, "EAP-GPSK: RAND_Server overflow");
return NULL;
}
os_memcpy(data->rand_server, pos, EAP_GPSK_RAND_LEN);
wpa_hexdump(MSG_DEBUG, "EAP-GPSK: RAND_Server",
data->rand_server, EAP_GPSK_RAND_LEN);
pos += EAP_GPSK_RAND_LEN;
if (end - pos < 2) {
wpa_printf(MSG_DEBUG, "EAP-GPSK: Too short GPSK-1 packet");
return NULL;
}
csuite_list_len = WPA_GET_BE16(pos);
pos += 2;
if (end - pos < (int) csuite_list_len) {
wpa_printf(MSG_DEBUG, "EAP-GPSK: CSuite_List overflow");
return NULL;
}
csuite_list = pos;
if (csuite_list_len == 0 ||
csuite_list_len % sizeof(struct eap_gpsk_csuite)) {
wpa_printf(MSG_DEBUG, "EAP-GPSK: Invalid CSuite_List len %d",
csuite_list_len);
return NULL;
}
count = csuite_list_len / sizeof(struct eap_gpsk_csuite);
data->vendor = EAP_GPSK_VENDOR_IETF;
data->specifier = EAP_GPSK_CIPHER_RESERVED;
csuite = (struct eap_gpsk_csuite *) csuite_list;
for (i = 0; i < count; i++) {
int vendor, specifier;
vendor = WPA_GET_BE24(csuite->vendor);
specifier = WPA_GET_BE24(csuite->specifier);
wpa_printf(MSG_DEBUG, "EAP-GPSK: CSuite[%d]: %d:%d",
i, vendor, specifier);
if (data->vendor == EAP_GPSK_VENDOR_IETF &&
data->specifier == EAP_GPSK_CIPHER_RESERVED &&
eap_gpsk_supported_ciphersuite(vendor, specifier)) {
data->vendor = vendor;
data->specifier = specifier;
}
csuite++;
}
if (data->vendor == EAP_GPSK_VENDOR_IETF &&
data->specifier == EAP_GPSK_CIPHER_RESERVED) {
wpa_msg(sm->msg_ctx, MSG_INFO, "EAP-GPSK: No supported "
"ciphersuite found");
eap_gpsk_state(data, FAILURE);
return NULL;
}
wpa_printf(MSG_DEBUG, "EAP-GPSK: Selected ciphersuite %d:%d",
data->vendor, data->specifier);
wpa_printf(MSG_DEBUG, "EAP-GPSK: Sending Response/GPSK-2");
miclen = eap_gpsk_mic_len(data->vendor, data->specifier);
len = 1 + 2 + data->id_client_len + 2 + data->id_server_len +
2 * EAP_GPSK_RAND_LEN + 2 + csuite_list_len +
sizeof(struct eap_gpsk_csuite) + 2 + miclen;
resp = eap_msg_alloc(EAP_VENDOR_IETF, EAP_TYPE_GPSK, respDataLen, len,
EAP_CODE_RESPONSE, req->identifier, &rpos);
if (resp == NULL)
return NULL;
*rpos++ = EAP_GPSK_OPCODE_GPSK_2;
start = rpos;
wpa_hexdump_ascii(MSG_DEBUG, "EAP-GPSK: ID_Client",
data->id_client, data->id_client_len);
WPA_PUT_BE16(rpos, data->id_client_len);
rpos += 2;
if (data->id_client)
os_memcpy(rpos, data->id_client, data->id_client_len);
rpos += data->id_client_len;
WPA_PUT_BE16(rpos, data->id_server_len);
rpos += 2;
if (data->id_server)
os_memcpy(rpos, data->id_server, data->id_server_len);
rpos += data->id_server_len;
if (os_get_random(data->rand_client, EAP_GPSK_RAND_LEN)) {
wpa_printf(MSG_DEBUG, "EAP-GPSK: Failed to get random data "
"for RAND_Client");
eap_gpsk_state(data, FAILURE);
os_free(resp);
return NULL;
}
wpa_hexdump(MSG_DEBUG, "EAP-GPSK: RAND_Client",
data->rand_client, EAP_GPSK_RAND_LEN);
os_memcpy(rpos, data->rand_client, EAP_GPSK_RAND_LEN);
rpos += EAP_GPSK_RAND_LEN;
os_memcpy(rpos, data->rand_server, EAP_GPSK_RAND_LEN);
rpos += EAP_GPSK_RAND_LEN;
WPA_PUT_BE16(rpos, csuite_list_len);
rpos += 2;
os_memcpy(rpos, csuite_list, csuite_list_len);
rpos += csuite_list_len;
csuite = (struct eap_gpsk_csuite *) rpos;
WPA_PUT_BE24(csuite->vendor, data->vendor);
WPA_PUT_BE24(csuite->specifier, data->specifier);
rpos = (u8 *) (csuite + 1);
if (eap_gpsk_derive_keys(data->psk, data->psk_len,
data->vendor, data->specifier,
data->rand_client, data->rand_server,
data->id_client, data->id_client_len,
data->id_server, data->id_server_len,
data->msk, data->emsk,
data->sk, &data->sk_len,
data->pk, &data->pk_len) < 0) {
wpa_printf(MSG_DEBUG, "EAP-GPSK: Failed to derive keys");
eap_gpsk_state(data, FAILURE);
os_free(resp);
return NULL;
}
/* No PD_Payload_1 */
WPA_PUT_BE16(rpos, 0);
rpos += 2;
if (eap_gpsk_compute_mic(data->sk, data->sk_len, data->vendor,
data->specifier, start, rpos - start, rpos) <
0) {
eap_gpsk_state(data, FAILURE);
os_free(resp);
return NULL;
}
eap_gpsk_state(data, GPSK_3);
return (u8 *) resp;
}
static int tls_write_server_finished(struct tlsv1_server *conn,
u8 **msgpos, u8 *end)
{
u8 *pos, *rhdr, *hs_start, *hs_length;
size_t rlen, hlen;
u8 verify_data[TLS_VERIFY_DATA_LEN];
u8 hash[MD5_MAC_LEN + SHA1_MAC_LEN];
pos = *msgpos;
wpa_printf(MSG_DEBUG, "TLSv1: Send Finished");
/* Encrypted Handshake Message: Finished */
hlen = MD5_MAC_LEN;
if (conn->verify.md5_server == NULL ||
crypto_hash_finish(conn->verify.md5_server, hash, &hlen) < 0) {
tlsv1_server_alert(conn, TLS_ALERT_LEVEL_FATAL,
TLS_ALERT_INTERNAL_ERROR);
conn->verify.md5_server = NULL;
crypto_hash_finish(conn->verify.sha1_server, NULL, NULL);
conn->verify.sha1_server = NULL;
return -1;
}
conn->verify.md5_server = NULL;
hlen = SHA1_MAC_LEN;
if (conn->verify.sha1_server == NULL ||
crypto_hash_finish(conn->verify.sha1_server, hash + MD5_MAC_LEN,
&hlen) < 0) {
conn->verify.sha1_server = NULL;
tlsv1_server_alert(conn, TLS_ALERT_LEVEL_FATAL,
TLS_ALERT_INTERNAL_ERROR);
return -1;
}
conn->verify.sha1_server = NULL;
if (tls_prf(conn->master_secret, TLS_MASTER_SECRET_LEN,
"server finished", hash, MD5_MAC_LEN + SHA1_MAC_LEN,
verify_data, TLS_VERIFY_DATA_LEN)) {
wpa_printf(MSG_DEBUG, "TLSv1: Failed to generate verify_data");
tlsv1_server_alert(conn, TLS_ALERT_LEVEL_FATAL,
TLS_ALERT_INTERNAL_ERROR);
return -1;
}
wpa_hexdump_key(MSG_DEBUG, "TLSv1: verify_data (server)",
verify_data, TLS_VERIFY_DATA_LEN);
rhdr = pos;
pos += TLS_RECORD_HEADER_LEN;
/* Handshake */
hs_start = pos;
/* HandshakeType msg_type */
*pos++ = TLS_HANDSHAKE_TYPE_FINISHED;
/* uint24 length (to be filled) */
hs_length = pos;
pos += 3;
os_memcpy(pos, verify_data, TLS_VERIFY_DATA_LEN);
pos += TLS_VERIFY_DATA_LEN;
WPA_PUT_BE24(hs_length, pos - hs_length - 3);
tls_verify_hash_add(&conn->verify, hs_start, pos - hs_start);
if (tlsv1_record_send(&conn->rl, TLS_CONTENT_TYPE_HANDSHAKE,
rhdr, end - rhdr, pos - hs_start, &rlen) < 0) {
wpa_printf(MSG_DEBUG, "TLSv1: Failed to create a record");
tlsv1_server_alert(conn, TLS_ALERT_LEVEL_FATAL,
TLS_ALERT_INTERNAL_ERROR);
return -1;
}
pos = rhdr + rlen;
*msgpos = pos;
return 0;
}
static int tls_write_client_certificate_verify(struct tlsv1_client *conn,
u8 **msgpos, u8 *end)
{
u8 *pos, *rhdr, *hs_start, *hs_length, *signed_start;
size_t rlen, hlen, clen;
u8 hash[100], *hpos;
enum { SIGN_ALG_RSA, SIGN_ALG_DSA } alg = SIGN_ALG_RSA;
pos = *msgpos;
wpa_printf(MSG_DEBUG, "TLSv1: Send CertificateVerify");
rhdr = pos;
pos += TLS_RECORD_HEADER_LEN;
/* Handshake */
hs_start = pos;
/* HandshakeType msg_type */
*pos++ = TLS_HANDSHAKE_TYPE_CERTIFICATE_VERIFY;
/* uint24 length (to be filled) */
hs_length = pos;
pos += 3;
/*
* RFC 2246: 7.4.3 and 7.4.8:
* Signature signature
*
* RSA:
* digitally-signed struct {
* opaque md5_hash[16];
* opaque sha_hash[20];
* };
*
* DSA:
* digitally-signed struct {
* opaque sha_hash[20];
* };
*
* The hash values are calculated over all handshake messages sent or
* received starting at ClientHello up to, but not including, this
* CertificateVerify message, including the type and length fields of
* the handshake messages.
*/
hpos = hash;
#ifdef CONFIG_TLSV12
if (conn->rl.tls_version == TLS_VERSION_1_2) {
hlen = SHA256_MAC_LEN;
if (conn->verify.sha256_cert == NULL ||
crypto_hash_finish(conn->verify.sha256_cert, hpos, &hlen) <
0) {
conn->verify.sha256_cert = NULL;
tls_alert(conn, TLS_ALERT_LEVEL_FATAL,
TLS_ALERT_INTERNAL_ERROR);
return -1;
}
conn->verify.sha256_cert = NULL;
/*
* RFC 3447, A.2.4 RSASSA-PKCS1-v1_5
*
* DigestInfo ::= SEQUENCE {
* digestAlgorithm DigestAlgorithm,
* digest OCTET STRING
* }
*
* SHA-256 OID: sha256WithRSAEncryption ::= {pkcs-1 11}
*
* DER encoded DigestInfo for SHA256 per RFC 3447:
* 30 31 30 0d 06 09 60 86 48 01 65 03 04 02 01 05 00 04 20 ||
* H
*/
os_memmove(hash + 19, hash, hlen);
hlen += 19;
os_memcpy(hash, "\x30\x31\x30\x0d\x06\x09\x60\x86\x48\x01\x65"
"\x03\x04\x02\x01\x05\x00\x04\x20", 19);
} else {
#endif /* CONFIG_TLSV12 */
if (alg == SIGN_ALG_RSA) {
hlen = MD5_MAC_LEN;
if (conn->verify.md5_cert == NULL ||
crypto_hash_finish(conn->verify.md5_cert, hpos, &hlen) < 0)
{
tls_alert(conn, TLS_ALERT_LEVEL_FATAL,
TLS_ALERT_INTERNAL_ERROR);
conn->verify.md5_cert = NULL;
crypto_hash_finish(conn->verify.sha1_cert, NULL, NULL);
conn->verify.sha1_cert = NULL;
return -1;
}
hpos += MD5_MAC_LEN;
} else
crypto_hash_finish(conn->verify.md5_cert, NULL, NULL);
conn->verify.md5_cert = NULL;
hlen = SHA1_MAC_LEN;
if (conn->verify.sha1_cert == NULL ||
crypto_hash_finish(conn->verify.sha1_cert, hpos, &hlen) < 0) {
conn->verify.sha1_cert = NULL;
tls_alert(conn, TLS_ALERT_LEVEL_FATAL,
TLS_ALERT_INTERNAL_ERROR);
return -1;
}
conn->verify.sha1_cert = NULL;
if (alg == SIGN_ALG_RSA)
hlen += MD5_MAC_LEN;
#ifdef CONFIG_TLSV12
}
#endif /* CONFIG_TLSV12 */
wpa_hexdump(MSG_MSGDUMP, "TLSv1: CertificateVerify hash", hash, hlen);
#ifdef CONFIG_TLSV12
if (conn->rl.tls_version >= TLS_VERSION_1_2) {
/*
* RFC 5246, 4.7:
* TLS v1.2 adds explicit indication of the used signature and
* hash algorithms.
*
* struct {
* HashAlgorithm hash;
* SignatureAlgorithm signature;
* } SignatureAndHashAlgorithm;
*/
*pos++ = TLS_HASH_ALG_SHA256;
*pos++ = TLS_SIGN_ALG_RSA;
}
#endif /* CONFIG_TLSV12 */
/*
* RFC 2246, 4.7:
* In digital signing, one-way hash functions are used as input for a
* signing algorithm. A digitally-signed element is encoded as an
* opaque vector <0..2^16-1>, where the length is specified by the
* signing algorithm and key.
*
* In RSA signing, a 36-byte structure of two hashes (one SHA and one
* MD5) is signed (encrypted with the private key). It is encoded with
* PKCS #1 block type 0 or type 1 as described in [PKCS1].
*/
signed_start = pos; /* length to be filled */
pos += 2;
clen = end - pos;
if (conn->cred == NULL ||
crypto_private_key_sign_pkcs1(conn->cred->key, hash, hlen,
pos, &clen) < 0) {
wpa_printf(MSG_DEBUG, "TLSv1: Failed to sign hash (PKCS #1)");
tls_alert(conn, TLS_ALERT_LEVEL_FATAL,
TLS_ALERT_INTERNAL_ERROR);
return -1;
}
WPA_PUT_BE16(signed_start, clen);
pos += clen;
WPA_PUT_BE24(hs_length, pos - hs_length - 3);
if (tlsv1_record_send(&conn->rl, TLS_CONTENT_TYPE_HANDSHAKE,
rhdr, end - rhdr, hs_start, pos - hs_start,
&rlen) < 0) {
wpa_printf(MSG_DEBUG, "TLSv1: Failed to generate a record");
tls_alert(conn, TLS_ALERT_LEVEL_FATAL,
TLS_ALERT_INTERNAL_ERROR);
return -1;
}
pos = rhdr + rlen;
tls_verify_hash_add(&conn->verify, hs_start, pos - hs_start);
*msgpos = pos;
return 0;
}