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eap-wsc: Handle M6 messages

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This commit is contained in:
Denis Kenzior 2016-08-31 11:18:21 -05:00
parent 2ac78e1306
commit 6dae861ce2
1 changed files with 49 additions and 0 deletions
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49
src/eap-wsc.c
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@ -337,6 +337,54 @@ static void eap_wsc_send_nack(struct eap_state *eap,
return;
}
static void eap_wsc_handle_m6(struct eap_state *eap,
const uint8_t *pdu, size_t len)
{
struct eap_wsc_state *wsc = eap_get_data(eap);
struct wsc_m6 m6;
struct iovec encrypted;
uint8_t *decrypted;
size_t decrypted_len;
struct wsc_m6_encrypted_settings m6es;
/* Spec unclear what to do here, see comments in eap_wsc_send_nack */
if (wsc_parse_m6(pdu, len, &m6, &encrypted) != 0) {
eap_wsc_send_nack(eap, WSC_CONFIGURATION_ERROR_NO_ERROR);
return;
}
if (!authenticator_check(wsc, pdu, len))
return;
decrypted = encrypted_settings_decrypt(wsc, encrypted.iov_base,
encrypted.iov_len,
&decrypted_len);
if (!decrypted)
goto send_nack;
if (wsc_parse_m6_encrypted_settings(decrypted, decrypted_len, &m6es))
goto invalid_settings;
if (!keywrap_authenticator_check(wsc, decrypted, decrypted_len))
goto invalid_settings;
l_free(decrypted);
/* We now have R-SNonce2, verify R-Hash2 stored in eap_wsc_handle_m4 */
if (!r_hash_check(wsc, m6es.r_snonce2, wsc->psk2, wsc->r_hash2)) {
eap_wsc_send_nack(eap,
WSC_CONFIGURATION_ERROR_DEVICE_PASSWORD_AUTH_FAILURE);
return;
}
return;
invalid_settings:
l_free(decrypted);
send_nack:
eap_wsc_send_nack(eap, WSC_CONFIGURATION_ERROR_DECRYPTION_CRC_FAILURE);
}
static void eap_wsc_send_m5(struct eap_state *eap,
const uint8_t *m4_pdu, size_t m4_len)
{
@ -651,6 +699,7 @@ static void eap_wsc_handle_request(struct eap_state *eap,
eap_wsc_handle_m4(eap, pkt + 2, len - 2);
break;
case STATE_EXPECT_M6:
eap_wsc_handle_m6(eap, pkt + 2, len - 2);
break;
}
}