hostap/eap_example/eap_example_server.c

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/*
* Example application showing how EAP server code from hostapd can be used as
* a library.
* Copyright (c) 2007, Jouni Malinen <j@w1.fi>
*
* This software may be distributed under the terms of the BSD license.
* See README for more details.
*/
#include "includes.h"
#include "common.h"
#include "crypto/tls.h"
#include "eap_server/eap.h"
#include "wpabuf.h"
void eap_example_peer_rx(const u8 *data, size_t data_len);
struct eap_server_ctx {
struct eap_eapol_interface *eap_if;
struct eap_sm *eap;
void *tls_ctx;
};
static struct eap_server_ctx eap_ctx;
static int server_get_eap_user(void *ctx, const u8 *identity,
size_t identity_len, int phase2,
struct eap_user *user)
{
os_memset(user, 0, sizeof(*user));
if (!phase2) {
/* Only allow EAP-PEAP as the Phase 1 method */
user->methods[0].vendor = EAP_VENDOR_IETF;
user->methods[0].method = EAP_TYPE_PEAP;
return 0;
}
if (identity_len != 4 || identity == NULL ||
os_memcmp(identity, "user", 4) != 0) {
printf("Unknown user\n");
return -1;
}
/* Only allow EAP-MSCHAPv2 as the Phase 2 method */
user->methods[0].vendor = EAP_VENDOR_IETF;
user->methods[0].method = EAP_TYPE_MSCHAPV2;
user->password = (u8 *) os_strdup("password");
user->password_len = 8;
return 0;
}
static const char * server_get_eap_req_id_text(void *ctx, size_t *len)
{
*len = 0;
return NULL;
}
static struct eapol_callbacks eap_cb;
static struct eap_config eap_conf;
static int eap_example_server_init_tls(void)
{
struct tls_config tconf;
struct tls_connection_params tparams;
os_memset(&tconf, 0, sizeof(tconf));
eap_ctx.tls_ctx = tls_init(&tconf);
if (eap_ctx.tls_ctx == NULL)
return -1;
os_memset(&tparams, 0, sizeof(tparams));
tparams.ca_cert = "ca.pem";
tparams.client_cert = "server.pem";
/* tparams.private_key = "server.key"; */
tparams.private_key = "server-key.pem";
/* tparams.private_key_passwd = "whatever"; */
tparams.dh_file = "dh.conf";
if (tls_global_set_params(eap_ctx.tls_ctx, &tparams)) {
printf("Failed to set TLS parameters\n");
return -1;
}
if (tls_global_set_verify(eap_ctx.tls_ctx, 0, 1)) {
printf("Failed to set check_crl\n");
return -1;
}
return 0;
}
static int eap_server_register_methods(void)
{
int ret = 0;
#ifdef EAP_SERVER_IDENTITY
if (ret == 0)
ret = eap_server_identity_register();
#endif /* EAP_SERVER_IDENTITY */
#ifdef EAP_SERVER_MD5
if (ret == 0)
ret = eap_server_md5_register();
#endif /* EAP_SERVER_MD5 */
#ifdef EAP_SERVER_TLS
if (ret == 0)
ret = eap_server_tls_register();
#endif /* EAP_SERVER_TLS */
#ifdef EAP_SERVER_MSCHAPV2
if (ret == 0)
ret = eap_server_mschapv2_register();
#endif /* EAP_SERVER_MSCHAPV2 */
#ifdef EAP_SERVER_PEAP
if (ret == 0)
ret = eap_server_peap_register();
#endif /* EAP_SERVER_PEAP */
#ifdef EAP_SERVER_TLV
if (ret == 0)
ret = eap_server_tlv_register();
#endif /* EAP_SERVER_TLV */
#ifdef EAP_SERVER_GTC
if (ret == 0)
ret = eap_server_gtc_register();
#endif /* EAP_SERVER_GTC */
#ifdef EAP_SERVER_TTLS
if (ret == 0)
ret = eap_server_ttls_register();
#endif /* EAP_SERVER_TTLS */
#ifdef EAP_SERVER_SIM
if (ret == 0)
ret = eap_server_sim_register();
#endif /* EAP_SERVER_SIM */
#ifdef EAP_SERVER_AKA
if (ret == 0)
ret = eap_server_aka_register();
#endif /* EAP_SERVER_AKA */
#ifdef EAP_SERVER_AKA_PRIME
if (ret == 0)
ret = eap_server_aka_prime_register();
#endif /* EAP_SERVER_AKA_PRIME */
#ifdef EAP_SERVER_PAX
if (ret == 0)
ret = eap_server_pax_register();
#endif /* EAP_SERVER_PAX */
#ifdef EAP_SERVER_PSK
if (ret == 0)
ret = eap_server_psk_register();
#endif /* EAP_SERVER_PSK */
#ifdef EAP_SERVER_SAKE
if (ret == 0)
ret = eap_server_sake_register();
#endif /* EAP_SERVER_SAKE */
#ifdef EAP_SERVER_GPSK
if (ret == 0)
ret = eap_server_gpsk_register();
#endif /* EAP_SERVER_GPSK */
#ifdef EAP_SERVER_VENDOR_TEST
if (ret == 0)
ret = eap_server_vendor_test_register();
#endif /* EAP_SERVER_VENDOR_TEST */
#ifdef EAP_SERVER_FAST
if (ret == 0)
ret = eap_server_fast_register();
#endif /* EAP_SERVER_FAST */
#ifdef EAP_SERVER_WSC
if (ret == 0)
ret = eap_server_wsc_register();
#endif /* EAP_SERVER_WSC */
#ifdef EAP_SERVER_IKEV2
if (ret == 0)
ret = eap_server_ikev2_register();
#endif /* EAP_SERVER_IKEV2 */
#ifdef EAP_SERVER_TNC
if (ret == 0)
ret = eap_server_tnc_register();
#endif /* EAP_SERVER_TNC */
return ret;
}
int eap_example_server_init(void)
{
if (eap_server_register_methods() < 0)
return -1;
os_memset(&eap_ctx, 0, sizeof(eap_ctx));
if (eap_example_server_init_tls() < 0)
return -1;
os_memset(&eap_cb, 0, sizeof(eap_cb));
eap_cb.get_eap_user = server_get_eap_user;
eap_cb.get_eap_req_id_text = server_get_eap_req_id_text;
os_memset(&eap_conf, 0, sizeof(eap_conf));
eap_conf.eap_server = 1;
eap_conf.ssl_ctx = eap_ctx.tls_ctx;
eap_ctx.eap = eap_server_sm_init(&eap_ctx, &eap_cb, &eap_conf);
if (eap_ctx.eap == NULL)
return -1;
eap_ctx.eap_if = eap_get_interface(eap_ctx.eap);
/* Enable "port" and request EAP to start authentication. */
eap_ctx.eap_if->portEnabled = TRUE;
eap_ctx.eap_if->eapRestart = TRUE;
return 0;
}
void eap_example_server_deinit(void)
{
eap_server_sm_deinit(eap_ctx.eap);
eap_server_unregister_methods();
tls_deinit(eap_ctx.tls_ctx);
}
int eap_example_server_step(void)
{
int res, process = 0;
res = eap_server_sm_step(eap_ctx.eap);
if (eap_ctx.eap_if->eapReq) {
printf("==> Request\n");
process = 1;
eap_ctx.eap_if->eapReq = 0;
}
if (eap_ctx.eap_if->eapSuccess) {
printf("==> Success\n");
process = 1;
res = 0;
eap_ctx.eap_if->eapSuccess = 0;
if (eap_ctx.eap_if->eapKeyAvailable) {
wpa_hexdump(MSG_DEBUG, "EAP keying material",
eap_ctx.eap_if->eapKeyData,
eap_ctx.eap_if->eapKeyDataLen);
}
}
if (eap_ctx.eap_if->eapFail) {
printf("==> Fail\n");
process = 1;
eap_ctx.eap_if->eapFail = 0;
}
if (process && eap_ctx.eap_if->eapReqData) {
/* Send EAP request to the peer */
eap_example_peer_rx(wpabuf_head(eap_ctx.eap_if->eapReqData),
wpabuf_len(eap_ctx.eap_if->eapReqData));
}
return res;
}
void eap_example_server_rx(const u8 *data, size_t data_len)
{
/* Make received EAP message available to the EAP library */
wpabuf_free(eap_ctx.eap_if->eapRespData);
eap_ctx.eap_if->eapRespData = wpabuf_alloc_copy(data, data_len);
if (eap_ctx.eap_if->eapRespData)
eap_ctx.eap_if->eapResp = TRUE;
}