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00015 #include "includes.h"
00016
00017 #include "common.h"
00018 #include "eap_i.h"
00019
00020
00021 struct eap_identity_data {
00022 enum { CONTINUE, SUCCESS, FAILURE } state;
00023 int pick_up;
00024 };
00025
00026
00027 static void * eap_identity_init(struct eap_sm *sm)
00028 {
00029 struct eap_identity_data *data;
00030
00031 data = os_zalloc(sizeof(*data));
00032 if (data == NULL)
00033 return NULL;
00034 data->state = CONTINUE;
00035
00036 return data;
00037 }
00038
00039
00040 static void * eap_identity_initPickUp(struct eap_sm *sm)
00041 {
00042 struct eap_identity_data *data;
00043 data = eap_identity_init(sm);
00044 if (data) {
00045 data->pick_up = 1;
00046 }
00047 return data;
00048 }
00049
00050
00051 static void eap_identity_reset(struct eap_sm *sm, void *priv)
00052 {
00053 struct eap_identity_data *data = priv;
00054 os_free(data);
00055 }
00056
00057
00058 static struct wpabuf * eap_identity_buildReq(struct eap_sm *sm, void *priv,
00059 u8 id)
00060 {
00061 struct eap_identity_data *data = priv;
00062 struct wpabuf *req;
00063 const char *req_data;
00064 size_t req_data_len;
00065
00066 if (sm->eapol_cb->get_eap_req_id_text) {
00067 req_data = sm->eapol_cb->get_eap_req_id_text(sm->eapol_ctx,
00068 &req_data_len);
00069 } else {
00070 req_data = NULL;
00071 req_data_len = 0;
00072 }
00073 req = eap_msg_alloc(EAP_VENDOR_IETF, EAP_TYPE_IDENTITY, req_data_len,
00074 EAP_CODE_REQUEST, id);
00075 if (req == NULL) {
00076 wpa_printf(MSG_ERROR, "EAP-Identity: Failed to allocate "
00077 "memory for request");
00078 data->state = FAILURE;
00079 return NULL;
00080 }
00081
00082 wpabuf_put_data(req, req_data, req_data_len);
00083
00084 return req;
00085 }
00086
00087
00088 static Boolean eap_identity_check(struct eap_sm *sm, void *priv,
00089 struct wpabuf *respData)
00090 {
00091 const u8 *pos;
00092 size_t len;
00093
00094 pos = eap_hdr_validate(EAP_VENDOR_IETF, EAP_TYPE_IDENTITY,
00095 respData, &len);
00096 if (pos == NULL) {
00097 wpa_printf(MSG_INFO, "EAP-Identity: Invalid frame");
00098 return TRUE;
00099 }
00100
00101 return FALSE;
00102 }
00103
00104
00105 static void eap_identity_process(struct eap_sm *sm, void *priv,
00106 struct wpabuf *respData)
00107 {
00108 struct eap_identity_data *data = priv;
00109 const u8 *pos;
00110 size_t len;
00111
00112 if (data->pick_up) {
00113 if (eap_identity_check(sm, data, respData)) {
00114 wpa_printf(MSG_DEBUG, "EAP-Identity: failed to pick "
00115 "up already started negotiation");
00116 data->state = FAILURE;
00117 return;
00118 }
00119 data->pick_up = 0;
00120 }
00121
00122 pos = eap_hdr_validate(EAP_VENDOR_IETF, EAP_TYPE_IDENTITY,
00123 respData, &len);
00124 if (pos == NULL)
00125 return;
00126
00127 wpa_hexdump_ascii(MSG_DEBUG, "EAP-Identity: Peer identity", pos, len);
00128 if (sm->identity)
00129 sm->update_user = TRUE;
00130 os_free(sm->identity);
00131 sm->identity = os_malloc(len ? len : 1);
00132 if (sm->identity == NULL) {
00133 data->state = FAILURE;
00134 } else {
00135 os_memcpy(sm->identity, pos, len);
00136 sm->identity_len = len;
00137 data->state = SUCCESS;
00138 }
00139 }
00140
00141
00142 static Boolean eap_identity_isDone(struct eap_sm *sm, void *priv)
00143 {
00144 struct eap_identity_data *data = priv;
00145 return data->state != CONTINUE;
00146 }
00147
00148
00149 static Boolean eap_identity_isSuccess(struct eap_sm *sm, void *priv)
00150 {
00151 struct eap_identity_data *data = priv;
00152 return data->state == SUCCESS;
00153 }
00154
00155
00156 int eap_server_identity_register(void)
00157 {
00158 struct eap_method *eap;
00159 int ret;
00160
00161 eap = eap_server_method_alloc(EAP_SERVER_METHOD_INTERFACE_VERSION,
00162 EAP_VENDOR_IETF, EAP_TYPE_IDENTITY,
00163 "Identity");
00164 if (eap == NULL)
00165 return -1;
00166
00167 eap->init = eap_identity_init;
00168 eap->initPickUp = eap_identity_initPickUp;
00169 eap->reset = eap_identity_reset;
00170 eap->buildReq = eap_identity_buildReq;
00171 eap->check = eap_identity_check;
00172 eap->process = eap_identity_process;
00173 eap->isDone = eap_identity_isDone;
00174 eap->isSuccess = eap_identity_isSuccess;
00175
00176 ret = eap_server_method_register(eap);
00177 if (ret)
00178 eap_server_method_free(eap);
00179 return ret;
00180 }