18d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt/* 28d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * hostapd / EAP-pwd (RFC 5931) server 38d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * Copyright (c) 2010, Dan Harkins <dharkins@lounge.org> 48d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * 5c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt * This software may be distributed under the terms of the BSD license. 6c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt * See README for more details. 78d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt */ 88d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 98d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt#include "includes.h" 108d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 118d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt#include "common.h" 1204949598a23f501be6eec21697465fd46a28840aDmitry Shmidt#include "crypto/sha256.h" 138d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt#include "eap_server/eap_i.h" 148d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt#include "eap_common/eap_pwd_common.h" 158d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 168d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 178d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidtstruct eap_pwd_data { 188d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt enum { 198d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt PWD_ID_Req, PWD_Commit_Req, PWD_Confirm_Req, SUCCESS, FAILURE 208d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } state; 218d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt u8 *id_peer; 228d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt size_t id_peer_len; 238d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt u8 *id_server; 248d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt size_t id_server_len; 258d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt u8 *password; 268d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt size_t password_len; 278d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt u32 token; 288d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt u16 group_num; 298d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt EAP_PWD_group *grp; 308d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 31c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt struct wpabuf *inbuf; 32c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt size_t in_frag_pos; 33c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt struct wpabuf *outbuf; 34c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt size_t out_frag_pos; 35c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt size_t mtu; 36c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt 378d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt BIGNUM *k; 388d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt BIGNUM *private_value; 398d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt BIGNUM *peer_scalar; 408d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt BIGNUM *my_scalar; 418d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt EC_POINT *my_element; 428d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt EC_POINT *peer_element; 438d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 4404949598a23f501be6eec21697465fd46a28840aDmitry Shmidt u8 my_confirm[SHA256_MAC_LEN]; 458d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 468d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt u8 msk[EAP_MSK_LEN]; 478d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt u8 emsk[EAP_EMSK_LEN]; 488d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 498d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt BN_CTX *bnctx; 508d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt}; 518d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 528d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 538d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidtstatic const char * eap_pwd_state_txt(int state) 548d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt{ 558d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt switch (state) { 568d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt case PWD_ID_Req: 578d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return "PWD-ID-Req"; 588d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt case PWD_Commit_Req: 598d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return "PWD-Commit-Req"; 608d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt case PWD_Confirm_Req: 618d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return "PWD-Confirm-Req"; 628d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt case SUCCESS: 638d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return "SUCCESS"; 648d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt case FAILURE: 658d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return "FAILURE"; 668d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt default: 678d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return "PWD-Unk"; 688d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 698d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt} 708d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 718d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 728d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidtstatic void eap_pwd_state(struct eap_pwd_data *data, int state) 738d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt{ 748d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpa_printf(MSG_DEBUG, "EAP-pwd: %s -> %s", 758d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt eap_pwd_state_txt(data->state), eap_pwd_state_txt(state)); 768d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt data->state = state; 778d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt} 788d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 798d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 808d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidtstatic void * eap_pwd_init(struct eap_sm *sm) 818d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt{ 828d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt struct eap_pwd_data *data; 838d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 848d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (sm->user == NULL || sm->user->password == NULL || 858d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt sm->user->password_len == 0) { 868d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpa_printf(MSG_INFO, "EAP-PWD (server): Password is not " 878d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt "configured"); 888d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return NULL; 898d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 908d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 918d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt data = os_zalloc(sizeof(*data)); 928d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (data == NULL) 938d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return NULL; 948d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 958d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt data->group_num = sm->pwd_group; 968d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpa_printf(MSG_DEBUG, "EAP-pwd: Selected group number %d", 978d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt data->group_num); 988d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt data->state = PWD_ID_Req; 998d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 1008d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt data->id_server = (u8 *) os_strdup("server"); 1018d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (data->id_server) 1028d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt data->id_server_len = os_strlen((char *) data->id_server); 1038d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 1048d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt data->password = os_malloc(sm->user->password_len); 1058d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (data->password == NULL) { 1068d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpa_printf(MSG_INFO, "EAP-PWD: Memory allocation password " 1078d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt "fail"); 1088d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt os_free(data->id_server); 1098d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt os_free(data); 1108d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return NULL; 1118d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 1128d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt data->password_len = sm->user->password_len; 1138d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt os_memcpy(data->password, sm->user->password, data->password_len); 1148d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 1158d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt data->bnctx = BN_CTX_new(); 1168d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (data->bnctx == NULL) { 1178d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpa_printf(MSG_INFO, "EAP-PWD: bn context allocation fail"); 1188d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt os_free(data->password); 1198d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt os_free(data->id_server); 1208d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt os_free(data); 1218d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return NULL; 1228d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 1238d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 124c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt data->in_frag_pos = data->out_frag_pos = 0; 125c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt data->inbuf = data->outbuf = NULL; 126c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt data->mtu = 1020; /* default from RFC 5931, make it configurable! */ 127c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt 1288d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return data; 1298d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt} 1308d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 1318d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 1328d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidtstatic void eap_pwd_reset(struct eap_sm *sm, void *priv) 1338d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt{ 1348d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt struct eap_pwd_data *data = priv; 1358d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 1368d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt BN_free(data->private_value); 1378d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt BN_free(data->peer_scalar); 1388d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt BN_free(data->my_scalar); 1398d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt BN_free(data->k); 1408d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt BN_CTX_free(data->bnctx); 1418d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt EC_POINT_free(data->my_element); 1428d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt EC_POINT_free(data->peer_element); 1438d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt os_free(data->id_peer); 1448d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt os_free(data->id_server); 1458d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt os_free(data->password); 1468d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (data->grp) { 1478d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt EC_GROUP_free(data->grp->group); 1488d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt EC_POINT_free(data->grp->pwe); 1498d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt BN_free(data->grp->order); 1508d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt BN_free(data->grp->prime); 1518d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt os_free(data->grp); 1528d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 1538d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt os_free(data); 1548d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt} 1558d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 1568d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 157c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidtstatic void eap_pwd_build_id_req(struct eap_sm *sm, struct eap_pwd_data *data, 158c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt u8 id) 1598d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt{ 1608d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpa_printf(MSG_DEBUG, "EAP-pwd: ID/Request"); 161c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt /* 162c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt * if we're fragmenting then we already have an id request, just return 163c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt */ 164c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt if (data->out_frag_pos) 165c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt return; 166c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt 167c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt data->outbuf = wpabuf_alloc(sizeof(struct eap_pwd_id) + 168c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt data->id_server_len); 169c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt if (data->outbuf == NULL) { 1708d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt eap_pwd_state(data, FAILURE); 171c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt return; 1728d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 1738d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 1748d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt /* an lfsr is good enough to generate unpredictable tokens */ 1758d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt data->token = os_random(); 176c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt wpabuf_put_be16(data->outbuf, data->group_num); 177c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt wpabuf_put_u8(data->outbuf, EAP_PWD_DEFAULT_RAND_FUNC); 178c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt wpabuf_put_u8(data->outbuf, EAP_PWD_DEFAULT_PRF); 179c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt wpabuf_put_data(data->outbuf, &data->token, sizeof(data->token)); 180c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt wpabuf_put_u8(data->outbuf, EAP_PWD_PREP_NONE); 181c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt wpabuf_put_data(data->outbuf, data->id_server, data->id_server_len); 1828d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt} 1838d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 1848d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 185c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidtstatic void eap_pwd_build_commit_req(struct eap_sm *sm, 186c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt struct eap_pwd_data *data, u8 id) 1878d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt{ 1888d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt BIGNUM *mask = NULL, *x = NULL, *y = NULL; 1898d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt u8 *scalar = NULL, *element = NULL; 1908d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt u16 offset; 1918d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 1928d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpa_printf(MSG_DEBUG, "EAP-pwd: Commit/Request"); 193c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt /* 194c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt * if we're fragmenting then we already have an commit request, just 195c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt * return 196c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt */ 197c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt if (data->out_frag_pos) 198c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt return; 1998d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 2008d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (((data->private_value = BN_new()) == NULL) || 2018d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt ((data->my_element = EC_POINT_new(data->grp->group)) == NULL) || 2028d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt ((data->my_scalar = BN_new()) == NULL) || 2038d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt ((mask = BN_new()) == NULL)) { 2048d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpa_printf(MSG_INFO, "EAP-PWD (server): scalar allocation " 2058d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt "fail"); 2068d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt goto fin; 2078d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 2088d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 2098d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt BN_rand_range(data->private_value, data->grp->order); 2108d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt BN_rand_range(mask, data->grp->order); 2118d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt BN_add(data->my_scalar, data->private_value, mask); 2128d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt BN_mod(data->my_scalar, data->my_scalar, data->grp->order, 2138d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt data->bnctx); 2148d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 2158d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (!EC_POINT_mul(data->grp->group, data->my_element, NULL, 2168d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt data->grp->pwe, mask, data->bnctx)) { 2178d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpa_printf(MSG_INFO, "EAP-PWD (server): element allocation " 2188d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt "fail"); 2198d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt eap_pwd_state(data, FAILURE); 2208d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt goto fin; 2218d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 2228d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 2238d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (!EC_POINT_invert(data->grp->group, data->my_element, data->bnctx)) 2248d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt { 2258d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpa_printf(MSG_INFO, "EAP-PWD (server): element inversion " 2268d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt "fail"); 2278d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt goto fin; 2288d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 2298d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt BN_free(mask); 2308d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 2318d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (((x = BN_new()) == NULL) || 2328d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt ((y = BN_new()) == NULL)) { 2338d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpa_printf(MSG_INFO, "EAP-PWD (server): point allocation " 2348d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt "fail"); 2358d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt goto fin; 2368d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 2378d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (!EC_POINT_get_affine_coordinates_GFp(data->grp->group, 2388d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt data->my_element, x, y, 2398d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt data->bnctx)) { 2408d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpa_printf(MSG_INFO, "EAP-PWD (server): point assignment " 2418d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt "fail"); 2428d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt goto fin; 2438d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 2448d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 2458d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (((scalar = os_malloc(BN_num_bytes(data->grp->order))) == NULL) || 2468d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt ((element = os_malloc(BN_num_bytes(data->grp->prime) * 2)) == 2478d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt NULL)) { 2488d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpa_printf(MSG_INFO, "EAP-PWD (server): data allocation fail"); 2498d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt goto fin; 2508d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 2518d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 2528d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt /* 2538d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * bignums occupy as little memory as possible so one that is 2548d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * sufficiently smaller than the prime or order might need pre-pending 2558d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * with zeros. 2568d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt */ 2578d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt os_memset(scalar, 0, BN_num_bytes(data->grp->order)); 2588d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt os_memset(element, 0, BN_num_bytes(data->grp->prime) * 2); 2598d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt offset = BN_num_bytes(data->grp->order) - 2608d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt BN_num_bytes(data->my_scalar); 2618d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt BN_bn2bin(data->my_scalar, scalar + offset); 2628d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 2638d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt offset = BN_num_bytes(data->grp->prime) - BN_num_bytes(x); 2648d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt BN_bn2bin(x, element + offset); 2658d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt offset = BN_num_bytes(data->grp->prime) - BN_num_bytes(y); 2668d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt BN_bn2bin(y, element + BN_num_bytes(data->grp->prime) + offset); 2678d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 268c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt data->outbuf = wpabuf_alloc(2 * BN_num_bytes(data->grp->prime) + 269c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt BN_num_bytes(data->grp->order)); 270c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt if (data->outbuf == NULL) 2718d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt goto fin; 2728d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 2738d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt /* We send the element as (x,y) followed by the scalar */ 274c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt wpabuf_put_data(data->outbuf, element, 275c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt 2 * BN_num_bytes(data->grp->prime)); 276c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt wpabuf_put_data(data->outbuf, scalar, BN_num_bytes(data->grp->order)); 2778d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 2788d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidtfin: 2798d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt os_free(scalar); 2808d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt os_free(element); 2818d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt BN_free(x); 2828d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt BN_free(y); 283c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt if (data->outbuf == NULL) 2848d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt eap_pwd_state(data, FAILURE); 2858d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt} 2868d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 2878d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 288c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidtstatic void eap_pwd_build_confirm_req(struct eap_sm *sm, 289c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt struct eap_pwd_data *data, u8 id) 2908d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt{ 2918d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt BIGNUM *x = NULL, *y = NULL; 29204949598a23f501be6eec21697465fd46a28840aDmitry Shmidt struct crypto_hash *hash; 29304949598a23f501be6eec21697465fd46a28840aDmitry Shmidt u8 conf[SHA256_MAC_LEN], *cruft = NULL, *ptr; 2948d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt u16 grp; 2951f69aa52ea2e0a73ac502565df8c666ee49cab6aDmitry Shmidt int offset; 2968d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 2978d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpa_printf(MSG_DEBUG, "EAP-pwd: Confirm/Request"); 298c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt /* 299c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt * if we're fragmenting then we already have an confirm request, just 300c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt * return 301c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt */ 302c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt if (data->out_frag_pos) 303c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt return; 3048d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 3058d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt /* Each component of the cruft will be at most as big as the prime */ 3068d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (((cruft = os_malloc(BN_num_bytes(data->grp->prime))) == NULL) || 3078d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt ((x = BN_new()) == NULL) || ((y = BN_new()) == NULL)) { 3088d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpa_printf(MSG_INFO, "EAP-PWD (server): debug allocation " 3098d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt "fail"); 3108d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt goto fin; 3118d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 3128d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 3138d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt /* 3148d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * commit is H(k | server_element | server_scalar | peer_element | 3158d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * peer_scalar | ciphersuite) 3168d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt */ 31704949598a23f501be6eec21697465fd46a28840aDmitry Shmidt hash = eap_pwd_h_init(); 31804949598a23f501be6eec21697465fd46a28840aDmitry Shmidt if (hash == NULL) 31904949598a23f501be6eec21697465fd46a28840aDmitry Shmidt goto fin; 3208d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 3218d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt /* 3228d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * Zero the memory each time because this is mod prime math and some 3238d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * value may start with a few zeros and the previous one did not. 3248d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * 3258d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * First is k 3268d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt */ 3278d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt os_memset(cruft, 0, BN_num_bytes(data->grp->prime)); 3281f69aa52ea2e0a73ac502565df8c666ee49cab6aDmitry Shmidt offset = BN_num_bytes(data->grp->prime) - BN_num_bytes(data->k); 3291f69aa52ea2e0a73ac502565df8c666ee49cab6aDmitry Shmidt BN_bn2bin(data->k, cruft + offset); 33004949598a23f501be6eec21697465fd46a28840aDmitry Shmidt eap_pwd_h_update(hash, cruft, BN_num_bytes(data->grp->prime)); 3318d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 3328d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt /* server element: x, y */ 3338d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (!EC_POINT_get_affine_coordinates_GFp(data->grp->group, 3348d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt data->my_element, x, y, 3358d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt data->bnctx)) { 3368d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpa_printf(MSG_INFO, "EAP-PWD (server): confirm point " 3378d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt "assignment fail"); 3388d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt goto fin; 3398d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 3408d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 3418d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt os_memset(cruft, 0, BN_num_bytes(data->grp->prime)); 3421f69aa52ea2e0a73ac502565df8c666ee49cab6aDmitry Shmidt offset = BN_num_bytes(data->grp->prime) - BN_num_bytes(x); 3431f69aa52ea2e0a73ac502565df8c666ee49cab6aDmitry Shmidt BN_bn2bin(x, cruft + offset); 34404949598a23f501be6eec21697465fd46a28840aDmitry Shmidt eap_pwd_h_update(hash, cruft, BN_num_bytes(data->grp->prime)); 3458d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt os_memset(cruft, 0, BN_num_bytes(data->grp->prime)); 3461f69aa52ea2e0a73ac502565df8c666ee49cab6aDmitry Shmidt offset = BN_num_bytes(data->grp->prime) - BN_num_bytes(y); 3471f69aa52ea2e0a73ac502565df8c666ee49cab6aDmitry Shmidt BN_bn2bin(y, cruft + offset); 34804949598a23f501be6eec21697465fd46a28840aDmitry Shmidt eap_pwd_h_update(hash, cruft, BN_num_bytes(data->grp->prime)); 3498d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 3508d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt /* server scalar */ 3518d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt os_memset(cruft, 0, BN_num_bytes(data->grp->prime)); 3521f69aa52ea2e0a73ac502565df8c666ee49cab6aDmitry Shmidt offset = BN_num_bytes(data->grp->order) - 3531f69aa52ea2e0a73ac502565df8c666ee49cab6aDmitry Shmidt BN_num_bytes(data->my_scalar); 3541f69aa52ea2e0a73ac502565df8c666ee49cab6aDmitry Shmidt BN_bn2bin(data->my_scalar, cruft + offset); 35504949598a23f501be6eec21697465fd46a28840aDmitry Shmidt eap_pwd_h_update(hash, cruft, BN_num_bytes(data->grp->order)); 3568d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 3578d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt /* peer element: x, y */ 3588d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (!EC_POINT_get_affine_coordinates_GFp(data->grp->group, 3598d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt data->peer_element, x, y, 3608d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt data->bnctx)) { 3618d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpa_printf(MSG_INFO, "EAP-PWD (server): confirm point " 3628d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt "assignment fail"); 3638d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt goto fin; 3648d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 3658d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 3668d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt os_memset(cruft, 0, BN_num_bytes(data->grp->prime)); 3671f69aa52ea2e0a73ac502565df8c666ee49cab6aDmitry Shmidt offset = BN_num_bytes(data->grp->prime) - BN_num_bytes(x); 3681f69aa52ea2e0a73ac502565df8c666ee49cab6aDmitry Shmidt BN_bn2bin(x, cruft + offset); 36904949598a23f501be6eec21697465fd46a28840aDmitry Shmidt eap_pwd_h_update(hash, cruft, BN_num_bytes(data->grp->prime)); 3708d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt os_memset(cruft, 0, BN_num_bytes(data->grp->prime)); 3711f69aa52ea2e0a73ac502565df8c666ee49cab6aDmitry Shmidt offset = BN_num_bytes(data->grp->prime) - BN_num_bytes(y); 3721f69aa52ea2e0a73ac502565df8c666ee49cab6aDmitry Shmidt BN_bn2bin(y, cruft + offset); 37304949598a23f501be6eec21697465fd46a28840aDmitry Shmidt eap_pwd_h_update(hash, cruft, BN_num_bytes(data->grp->prime)); 3748d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 3758d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt /* peer scalar */ 3768d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt os_memset(cruft, 0, BN_num_bytes(data->grp->prime)); 3771f69aa52ea2e0a73ac502565df8c666ee49cab6aDmitry Shmidt offset = BN_num_bytes(data->grp->order) - 3781f69aa52ea2e0a73ac502565df8c666ee49cab6aDmitry Shmidt BN_num_bytes(data->peer_scalar); 3791f69aa52ea2e0a73ac502565df8c666ee49cab6aDmitry Shmidt BN_bn2bin(data->peer_scalar, cruft + offset); 38004949598a23f501be6eec21697465fd46a28840aDmitry Shmidt eap_pwd_h_update(hash, cruft, BN_num_bytes(data->grp->order)); 3818d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 3828d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt /* ciphersuite */ 3838d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt grp = htons(data->group_num); 3848d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt os_memset(cruft, 0, BN_num_bytes(data->grp->prime)); 3858d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt ptr = cruft; 3868d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt os_memcpy(ptr, &grp, sizeof(u16)); 3878d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt ptr += sizeof(u16); 3888d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt *ptr = EAP_PWD_DEFAULT_RAND_FUNC; 3898d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt ptr += sizeof(u8); 3908d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt *ptr = EAP_PWD_DEFAULT_PRF; 3918d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt ptr += sizeof(u8); 39204949598a23f501be6eec21697465fd46a28840aDmitry Shmidt eap_pwd_h_update(hash, cruft, ptr - cruft); 3938d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 3948d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt /* all done with the random function */ 39504949598a23f501be6eec21697465fd46a28840aDmitry Shmidt eap_pwd_h_final(hash, conf); 39604949598a23f501be6eec21697465fd46a28840aDmitry Shmidt os_memcpy(data->my_confirm, conf, SHA256_MAC_LEN); 3978d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 39804949598a23f501be6eec21697465fd46a28840aDmitry Shmidt data->outbuf = wpabuf_alloc(SHA256_MAC_LEN); 399c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt if (data->outbuf == NULL) 4008d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt goto fin; 4018d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 40204949598a23f501be6eec21697465fd46a28840aDmitry Shmidt wpabuf_put_data(data->outbuf, conf, SHA256_MAC_LEN); 4038d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 4048d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidtfin: 4058d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt os_free(cruft); 4068d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt BN_free(x); 4078d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt BN_free(y); 408c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt if (data->outbuf == NULL) 4098d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt eap_pwd_state(data, FAILURE); 4108d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt} 4118d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 4128d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 4138d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidtstatic struct wpabuf * 4148d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidteap_pwd_build_req(struct eap_sm *sm, void *priv, u8 id) 4158d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt{ 4168d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt struct eap_pwd_data *data = priv; 417c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt struct wpabuf *req; 418c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt u8 lm_exch; 419c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt const u8 *buf; 420c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt u16 totlen = 0; 421c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt size_t len; 422c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt 423c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt /* 424c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt * if we're buffering response fragments then just ACK 425c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt */ 426c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt if (data->in_frag_pos) { 427c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt wpa_printf(MSG_DEBUG, "EAP-pwd: ACKing a fragment!!"); 428c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt req = eap_msg_alloc(EAP_VENDOR_IETF, EAP_TYPE_PWD, 429c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt EAP_PWD_HDR_SIZE, EAP_CODE_REQUEST, id); 430c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt if (req == NULL) { 431c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt eap_pwd_state(data, FAILURE); 432c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt return NULL; 433c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt } 434c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt switch (data->state) { 435c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt case PWD_ID_Req: 436c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt wpabuf_put_u8(req, EAP_PWD_OPCODE_ID_EXCH); 437c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt break; 438c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt case PWD_Commit_Req: 439c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt wpabuf_put_u8(req, EAP_PWD_OPCODE_COMMIT_EXCH); 440c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt break; 441c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt case PWD_Confirm_Req: 442c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt wpabuf_put_u8(req, EAP_PWD_OPCODE_CONFIRM_EXCH); 443c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt break; 444c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt default: 445c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt eap_pwd_state(data, FAILURE); /* just to be sure */ 446c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt wpabuf_free(req); 447c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt return NULL; 448c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt } 449c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt return req; 450c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt } 4518d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 452c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt /* 453c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt * build the data portion of a request 454c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt */ 4558d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt switch (data->state) { 456c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt case PWD_ID_Req: 457c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt eap_pwd_build_id_req(sm, data, id); 458c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt lm_exch = EAP_PWD_OPCODE_ID_EXCH; 459c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt break; 460c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt case PWD_Commit_Req: 461c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt eap_pwd_build_commit_req(sm, data, id); 462c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt lm_exch = EAP_PWD_OPCODE_COMMIT_EXCH; 463c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt break; 464c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt case PWD_Confirm_Req: 465c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt eap_pwd_build_confirm_req(sm, data, id); 466c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt lm_exch = EAP_PWD_OPCODE_CONFIRM_EXCH; 467c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt break; 468c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt default: 4698d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpa_printf(MSG_INFO, "EAP-pwd: Unknown state %d in build_req", 4708d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt data->state); 471c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt eap_pwd_state(data, FAILURE); 472c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt lm_exch = 0; /* hush now, sweet compiler */ 4738d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt break; 4748d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 4758d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 476c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt if (data->state == FAILURE) 477c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt return NULL; 478c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt 479c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt /* 480c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt * determine whether that data needs to be fragmented 481c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt */ 482c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt len = wpabuf_len(data->outbuf) - data->out_frag_pos; 483c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt if ((len + EAP_PWD_HDR_SIZE) > data->mtu) { 484c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt len = data->mtu - EAP_PWD_HDR_SIZE; 485c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt EAP_PWD_SET_MORE_BIT(lm_exch); 486c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt /* 487c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt * if this is the first fragment, need to set the M bit 488c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt * and add the total length to the eap_pwd_hdr 489c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt */ 490c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt if (data->out_frag_pos == 0) { 491c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt EAP_PWD_SET_LENGTH_BIT(lm_exch); 492c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt totlen = wpabuf_len(data->outbuf) + 493c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt EAP_PWD_HDR_SIZE + sizeof(u16); 494c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt len -= sizeof(u16); 495c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt wpa_printf(MSG_DEBUG, "EAP-pwd: Fragmenting output, " 496c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt "total length = %d", totlen); 497c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt } 498c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt wpa_printf(MSG_DEBUG, "EAP-pwd: Send a %d byte fragment", 499c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt (int) len); 500c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt } 501c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt 502c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt /* 503c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt * alloc an eap request and populate it with the data 504c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt */ 505c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt req = eap_msg_alloc(EAP_VENDOR_IETF, EAP_TYPE_PWD, 506c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt EAP_PWD_HDR_SIZE + len + 507c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt (totlen ? sizeof(u16) : 0), 508c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt EAP_CODE_REQUEST, id); 509c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt if (req == NULL) { 510c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt eap_pwd_state(data, FAILURE); 511c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt return NULL; 512c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt } 513c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt 514c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt wpabuf_put_u8(req, lm_exch); 515c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt if (EAP_PWD_GET_LENGTH_BIT(lm_exch)) 516c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt wpabuf_put_be16(req, totlen); 517c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt 518c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt buf = wpabuf_head_u8(data->outbuf); 519c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt wpabuf_put_data(req, buf + data->out_frag_pos, len); 520c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt data->out_frag_pos += len; 521c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt /* 522c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt * either not fragged or last fragment, either way free up the data 523c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt */ 524c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt if (data->out_frag_pos >= wpabuf_len(data->outbuf)) { 525c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt wpabuf_free(data->outbuf); 526c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt data->out_frag_pos = 0; 527c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt } 528c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt 529c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt return req; 5308d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt} 5318d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 5328d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 5338d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidtstatic Boolean eap_pwd_check(struct eap_sm *sm, void *priv, 5348d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt struct wpabuf *respData) 5358d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt{ 5368d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt struct eap_pwd_data *data = priv; 5378d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt const u8 *pos; 5388d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt size_t len; 5398d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 5408d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt pos = eap_hdr_validate(EAP_VENDOR_IETF, EAP_TYPE_PWD, respData, &len); 5418d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (pos == NULL || len < 1) { 5428d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpa_printf(MSG_INFO, "EAP-pwd: Invalid frame"); 5438d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return TRUE; 5448d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 5458d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 546c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt wpa_printf(MSG_DEBUG, "EAP-pwd: Received frame: exch = %d, len = %d", 547c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt EAP_PWD_GET_EXCHANGE(*pos), (int) len); 5488d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 549c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt if (data->state == PWD_ID_Req && 550c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt ((EAP_PWD_GET_EXCHANGE(*pos)) == EAP_PWD_OPCODE_ID_EXCH)) 5518d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return FALSE; 5528d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 5538d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (data->state == PWD_Commit_Req && 554c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt ((EAP_PWD_GET_EXCHANGE(*pos)) == EAP_PWD_OPCODE_COMMIT_EXCH)) 5558d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return FALSE; 5568d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 5578d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (data->state == PWD_Confirm_Req && 558c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt ((EAP_PWD_GET_EXCHANGE(*pos)) == EAP_PWD_OPCODE_CONFIRM_EXCH)) 5598d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return FALSE; 5608d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 5618d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpa_printf(MSG_INFO, "EAP-pwd: Unexpected opcode=%d in state=%d", 5628d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt *pos, data->state); 5638d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 5648d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return TRUE; 5658d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt} 5668d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 5678d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 5688d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidtstatic void eap_pwd_process_id_resp(struct eap_sm *sm, 5698d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt struct eap_pwd_data *data, 5708d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt const u8 *payload, size_t payload_len) 5718d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt{ 5728d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt struct eap_pwd_id *id; 5738d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 5748d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (payload_len < sizeof(struct eap_pwd_id)) { 5758d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpa_printf(MSG_INFO, "EAP-pwd: Invalid ID response"); 5768d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return; 5778d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 5788d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 5798d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt id = (struct eap_pwd_id *) payload; 5808d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if ((data->group_num != be_to_host16(id->group_num)) || 5818d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt (id->random_function != EAP_PWD_DEFAULT_RAND_FUNC) || 5828d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt (os_memcmp(id->token, (u8 *)&data->token, sizeof(data->token))) || 5838d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt (id->prf != EAP_PWD_DEFAULT_PRF)) { 5848d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpa_printf(MSG_INFO, "EAP-pwd: peer changed parameters"); 5858d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt eap_pwd_state(data, FAILURE); 5868d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return; 5878d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 5888d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt data->id_peer = os_malloc(payload_len - sizeof(struct eap_pwd_id)); 5898d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (data->id_peer == NULL) { 5908d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpa_printf(MSG_INFO, "EAP-PWD: memory allocation id fail"); 5918d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return; 5928d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 5938d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt data->id_peer_len = payload_len - sizeof(struct eap_pwd_id); 5948d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt os_memcpy(data->id_peer, id->identity, data->id_peer_len); 5958d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpa_hexdump_ascii(MSG_DEBUG, "EAP-PWD (server): peer sent id of", 5968d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt data->id_peer, data->id_peer_len); 5978d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 5988d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if ((data->grp = os_malloc(sizeof(EAP_PWD_group))) == NULL) { 5998d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpa_printf(MSG_INFO, "EAP-PWD: failed to allocate memory for " 6008d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt "group"); 6018d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return; 6028d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 6038d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (compute_password_element(data->grp, data->group_num, 6048d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt data->password, data->password_len, 6058d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt data->id_server, data->id_server_len, 6068d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt data->id_peer, data->id_peer_len, 6078d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt (u8 *) &data->token)) { 6088d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpa_printf(MSG_INFO, "EAP-PWD (server): unable to compute " 6098d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt "PWE"); 6108d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return; 6118d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 6128d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpa_printf(MSG_DEBUG, "EAP-PWD (server): computed %d bit PWE...", 6138d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt BN_num_bits(data->grp->prime)); 6148d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 6158d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt eap_pwd_state(data, PWD_Commit_Req); 6168d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt} 6178d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 6188d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 6198d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidtstatic void 6208d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidteap_pwd_process_commit_resp(struct eap_sm *sm, struct eap_pwd_data *data, 6218d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt const u8 *payload, size_t payload_len) 6228d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt{ 6238d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt u8 *ptr; 6248d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt BIGNUM *x = NULL, *y = NULL, *cofactor = NULL; 6258d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt EC_POINT *K = NULL, *point = NULL; 6268d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt int res = 0; 6278d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 6288d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpa_printf(MSG_DEBUG, "EAP-pwd: Received commit response"); 6298d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 6308d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (((data->peer_scalar = BN_new()) == NULL) || 6318d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt ((data->k = BN_new()) == NULL) || 6328d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt ((cofactor = BN_new()) == NULL) || 6338d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt ((x = BN_new()) == NULL) || 6348d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt ((y = BN_new()) == NULL) || 6358d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt ((point = EC_POINT_new(data->grp->group)) == NULL) || 6368d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt ((K = EC_POINT_new(data->grp->group)) == NULL) || 6378d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt ((data->peer_element = EC_POINT_new(data->grp->group)) == NULL)) { 6388d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpa_printf(MSG_INFO, "EAP-PWD (server): peer data allocation " 6398d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt "fail"); 6408d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt goto fin; 6418d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 6428d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 6438d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (!EC_GROUP_get_cofactor(data->grp->group, cofactor, NULL)) { 6448d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpa_printf(MSG_INFO, "EAP-PWD (server): unable to get " 6458d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt "cofactor for curve"); 6468d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt goto fin; 6478d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 6488d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 6498d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt /* element, x then y, followed by scalar */ 6508d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt ptr = (u8 *) payload; 6518d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt BN_bin2bn(ptr, BN_num_bytes(data->grp->prime), x); 6528d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt ptr += BN_num_bytes(data->grp->prime); 6538d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt BN_bin2bn(ptr, BN_num_bytes(data->grp->prime), y); 6548d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt ptr += BN_num_bytes(data->grp->prime); 6558d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt BN_bin2bn(ptr, BN_num_bytes(data->grp->order), data->peer_scalar); 6568d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (!EC_POINT_set_affine_coordinates_GFp(data->grp->group, 6578d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt data->peer_element, x, y, 6588d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt data->bnctx)) { 6598d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpa_printf(MSG_INFO, "EAP-PWD (server): setting peer element " 6608d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt "fail"); 6618d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt goto fin; 6628d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 6638d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 6648d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt /* check to ensure peer's element is not in a small sub-group */ 6658d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (BN_cmp(cofactor, BN_value_one())) { 6668d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (!EC_POINT_mul(data->grp->group, point, NULL, 6678d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt data->peer_element, cofactor, NULL)) { 6688d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpa_printf(MSG_INFO, "EAP-PWD (server): cannot " 6698d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt "multiply peer element by order"); 6708d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt goto fin; 6718d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 6728d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (EC_POINT_is_at_infinity(data->grp->group, point)) { 6738d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpa_printf(MSG_INFO, "EAP-PWD (server): peer element " 6748d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt "is at infinity!\n"); 6758d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt goto fin; 6768d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 6778d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 6788d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 6798d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt /* compute the shared key, k */ 6808d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if ((!EC_POINT_mul(data->grp->group, K, NULL, data->grp->pwe, 6818d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt data->peer_scalar, data->bnctx)) || 6828d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt (!EC_POINT_add(data->grp->group, K, K, data->peer_element, 6838d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt data->bnctx)) || 6848d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt (!EC_POINT_mul(data->grp->group, K, NULL, K, data->private_value, 6858d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt data->bnctx))) { 6868d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpa_printf(MSG_INFO, "EAP-PWD (server): computing shared key " 6878d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt "fail"); 6888d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt goto fin; 6898d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 6908d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 6918d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt /* ensure that the shared key isn't in a small sub-group */ 6928d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (BN_cmp(cofactor, BN_value_one())) { 6938d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (!EC_POINT_mul(data->grp->group, K, NULL, K, cofactor, 6948d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt NULL)) { 6958d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpa_printf(MSG_INFO, "EAP-PWD (server): cannot " 6968d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt "multiply shared key point by order!\n"); 6978d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt goto fin; 6988d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 6998d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 7008d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 7018d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt /* 7028d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * This check is strictly speaking just for the case above where 7038d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * co-factor > 1 but it was suggested that even though this is probably 7048d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * never going to happen it is a simple and safe check "just to be 7058d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * sure" so let's be safe. 7068d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt */ 7078d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (EC_POINT_is_at_infinity(data->grp->group, K)) { 7088d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpa_printf(MSG_INFO, "EAP-PWD (server): shared key point is " 7098d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt "at infinity"); 7108d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt goto fin; 7118d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 7128d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (!EC_POINT_get_affine_coordinates_GFp(data->grp->group, K, data->k, 7138d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt NULL, data->bnctx)) { 7148d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpa_printf(MSG_INFO, "EAP-PWD (server): unable to extract " 7158d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt "shared secret from secret point"); 7168d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt goto fin; 7178d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 7188d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt res = 1; 7198d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 7208d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidtfin: 7218d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt EC_POINT_free(K); 7228d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt EC_POINT_free(point); 7238d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt BN_free(cofactor); 7248d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt BN_free(x); 7258d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt BN_free(y); 7268d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 7278d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (res) 7288d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt eap_pwd_state(data, PWD_Confirm_Req); 7298d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt else 7308d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt eap_pwd_state(data, FAILURE); 7318d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt} 7328d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 7338d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 7348d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidtstatic void 7358d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidteap_pwd_process_confirm_resp(struct eap_sm *sm, struct eap_pwd_data *data, 7368d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt const u8 *payload, size_t payload_len) 7378d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt{ 7388d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt BIGNUM *x = NULL, *y = NULL; 73904949598a23f501be6eec21697465fd46a28840aDmitry Shmidt struct crypto_hash *hash; 7408d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt u32 cs; 7418d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt u16 grp; 74204949598a23f501be6eec21697465fd46a28840aDmitry Shmidt u8 conf[SHA256_MAC_LEN], *cruft = NULL, *ptr; 7431f69aa52ea2e0a73ac502565df8c666ee49cab6aDmitry Shmidt int offset; 7448d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 7458d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt /* build up the ciphersuite: group | random_function | prf */ 7468d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt grp = htons(data->group_num); 7478d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt ptr = (u8 *) &cs; 7488d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt os_memcpy(ptr, &grp, sizeof(u16)); 7498d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt ptr += sizeof(u16); 7508d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt *ptr = EAP_PWD_DEFAULT_RAND_FUNC; 7518d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt ptr += sizeof(u8); 7528d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt *ptr = EAP_PWD_DEFAULT_PRF; 7538d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 7548d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt /* each component of the cruft will be at most as big as the prime */ 7558d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (((cruft = os_malloc(BN_num_bytes(data->grp->prime))) == NULL) || 7568d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt ((x = BN_new()) == NULL) || ((y = BN_new()) == NULL)) { 7578d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpa_printf(MSG_INFO, "EAP-PWD (peer): allocation fail"); 7588d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt goto fin; 7598d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 7608d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 7618d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt /* 7628d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * commit is H(k | peer_element | peer_scalar | server_element | 7638d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * server_scalar | ciphersuite) 7648d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt */ 76504949598a23f501be6eec21697465fd46a28840aDmitry Shmidt hash = eap_pwd_h_init(); 76604949598a23f501be6eec21697465fd46a28840aDmitry Shmidt if (hash == NULL) 76704949598a23f501be6eec21697465fd46a28840aDmitry Shmidt goto fin; 7688d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 7698d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt /* k */ 7708d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt os_memset(cruft, 0, BN_num_bytes(data->grp->prime)); 7711f69aa52ea2e0a73ac502565df8c666ee49cab6aDmitry Shmidt offset = BN_num_bytes(data->grp->prime) - BN_num_bytes(data->k); 7721f69aa52ea2e0a73ac502565df8c666ee49cab6aDmitry Shmidt BN_bn2bin(data->k, cruft + offset); 77304949598a23f501be6eec21697465fd46a28840aDmitry Shmidt eap_pwd_h_update(hash, cruft, BN_num_bytes(data->grp->prime)); 7748d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 7758d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt /* peer element: x, y */ 7768d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (!EC_POINT_get_affine_coordinates_GFp(data->grp->group, 7778d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt data->peer_element, x, y, 7788d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt data->bnctx)) { 7798d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpa_printf(MSG_INFO, "EAP-PWD (server): confirm point " 7808d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt "assignment fail"); 7818d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt goto fin; 7828d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 7838d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt os_memset(cruft, 0, BN_num_bytes(data->grp->prime)); 7841f69aa52ea2e0a73ac502565df8c666ee49cab6aDmitry Shmidt offset = BN_num_bytes(data->grp->prime) - BN_num_bytes(x); 7851f69aa52ea2e0a73ac502565df8c666ee49cab6aDmitry Shmidt BN_bn2bin(x, cruft + offset); 78604949598a23f501be6eec21697465fd46a28840aDmitry Shmidt eap_pwd_h_update(hash, cruft, BN_num_bytes(data->grp->prime)); 7878d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt os_memset(cruft, 0, BN_num_bytes(data->grp->prime)); 7881f69aa52ea2e0a73ac502565df8c666ee49cab6aDmitry Shmidt offset = BN_num_bytes(data->grp->prime) - BN_num_bytes(y); 7891f69aa52ea2e0a73ac502565df8c666ee49cab6aDmitry Shmidt BN_bn2bin(y, cruft + offset); 79004949598a23f501be6eec21697465fd46a28840aDmitry Shmidt eap_pwd_h_update(hash, cruft, BN_num_bytes(data->grp->prime)); 7918d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 7928d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt /* peer scalar */ 7938d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt os_memset(cruft, 0, BN_num_bytes(data->grp->prime)); 7941f69aa52ea2e0a73ac502565df8c666ee49cab6aDmitry Shmidt offset = BN_num_bytes(data->grp->order) - 7951f69aa52ea2e0a73ac502565df8c666ee49cab6aDmitry Shmidt BN_num_bytes(data->peer_scalar); 7961f69aa52ea2e0a73ac502565df8c666ee49cab6aDmitry Shmidt BN_bn2bin(data->peer_scalar, cruft + offset); 79704949598a23f501be6eec21697465fd46a28840aDmitry Shmidt eap_pwd_h_update(hash, cruft, BN_num_bytes(data->grp->order)); 7988d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 7998d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt /* server element: x, y */ 8008d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (!EC_POINT_get_affine_coordinates_GFp(data->grp->group, 8018d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt data->my_element, x, y, 8028d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt data->bnctx)) { 8038d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpa_printf(MSG_INFO, "EAP-PWD (server): confirm point " 8048d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt "assignment fail"); 8058d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt goto fin; 8068d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 8078d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 8088d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt os_memset(cruft, 0, BN_num_bytes(data->grp->prime)); 8091f69aa52ea2e0a73ac502565df8c666ee49cab6aDmitry Shmidt offset = BN_num_bytes(data->grp->prime) - BN_num_bytes(x); 8101f69aa52ea2e0a73ac502565df8c666ee49cab6aDmitry Shmidt BN_bn2bin(x, cruft + offset); 81104949598a23f501be6eec21697465fd46a28840aDmitry Shmidt eap_pwd_h_update(hash, cruft, BN_num_bytes(data->grp->prime)); 8128d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt os_memset(cruft, 0, BN_num_bytes(data->grp->prime)); 8131f69aa52ea2e0a73ac502565df8c666ee49cab6aDmitry Shmidt offset = BN_num_bytes(data->grp->prime) - BN_num_bytes(y); 8141f69aa52ea2e0a73ac502565df8c666ee49cab6aDmitry Shmidt BN_bn2bin(y, cruft + offset); 81504949598a23f501be6eec21697465fd46a28840aDmitry Shmidt eap_pwd_h_update(hash, cruft, BN_num_bytes(data->grp->prime)); 8168d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 8178d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt /* server scalar */ 8188d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt os_memset(cruft, 0, BN_num_bytes(data->grp->prime)); 8191f69aa52ea2e0a73ac502565df8c666ee49cab6aDmitry Shmidt offset = BN_num_bytes(data->grp->order) - 8201f69aa52ea2e0a73ac502565df8c666ee49cab6aDmitry Shmidt BN_num_bytes(data->my_scalar); 8211f69aa52ea2e0a73ac502565df8c666ee49cab6aDmitry Shmidt BN_bn2bin(data->my_scalar, cruft + offset); 82204949598a23f501be6eec21697465fd46a28840aDmitry Shmidt eap_pwd_h_update(hash, cruft, BN_num_bytes(data->grp->order)); 8238d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 8248d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt /* ciphersuite */ 8258d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt os_memset(cruft, 0, BN_num_bytes(data->grp->prime)); 82604949598a23f501be6eec21697465fd46a28840aDmitry Shmidt eap_pwd_h_update(hash, (u8 *) &cs, sizeof(u32)); 8278d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 8288d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt /* all done */ 82904949598a23f501be6eec21697465fd46a28840aDmitry Shmidt eap_pwd_h_final(hash, conf); 8308d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 8318d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt ptr = (u8 *) payload; 83204949598a23f501be6eec21697465fd46a28840aDmitry Shmidt if (os_memcmp(conf, ptr, SHA256_MAC_LEN)) { 8338d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpa_printf(MSG_INFO, "EAP-PWD (server): confirm did not " 8348d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt "verify"); 8358d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt goto fin; 8368d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 8378d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 8388d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpa_printf(MSG_DEBUG, "EAP-pwd (server): confirm verified"); 8398d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (compute_keys(data->grp, data->bnctx, data->k, 8408d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt data->peer_scalar, data->my_scalar, conf, 8418d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt data->my_confirm, &cs, data->msk, data->emsk) < 0) 8428d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt eap_pwd_state(data, FAILURE); 8438d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt else 8448d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt eap_pwd_state(data, SUCCESS); 8458d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 8468d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidtfin: 8478d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt os_free(cruft); 8488d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt BN_free(x); 8498d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt BN_free(y); 8508d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt} 8518d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 8528d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 8538d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidtstatic void eap_pwd_process(struct eap_sm *sm, void *priv, 8548d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt struct wpabuf *respData) 8558d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt{ 8568d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt struct eap_pwd_data *data = priv; 8578d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt const u8 *pos; 8588d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt size_t len; 859c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt u8 lm_exch; 860c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt u16 tot_len; 8618d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 8628d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt pos = eap_hdr_validate(EAP_VENDOR_IETF, EAP_TYPE_PWD, respData, &len); 8638d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if ((pos == NULL) || (len < 1)) { 8648d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpa_printf(MSG_INFO, "Bad EAP header! pos %s and len = %d", 8658d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt (pos == NULL) ? "is NULL" : "is not NULL", 8668d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt (int) len); 8678d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return; 8688d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 8698d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 870c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt lm_exch = *pos; 871c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt pos++; /* skip over the bits and the exch */ 872c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt len--; 873c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt 874c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt /* 875c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt * if we're fragmenting then this should be an ACK with no data, 876c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt * just return and continue fragmenting in the "build" section above 877c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt */ 878c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt if (data->out_frag_pos) { 879c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt if (len > 1) 880c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt wpa_printf(MSG_INFO, "EAP-pwd: Bad response! " 881c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt "Fragmenting but not an ACK"); 882c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt else 883c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt wpa_printf(MSG_DEBUG, "EAP-pwd: received ACK from " 884c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt "peer"); 885c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt return; 886c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt } 887c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt /* 888c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt * if we're receiving fragmented packets then we need to buffer... 889c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt * 890c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt * the first fragment has a total length 891c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt */ 892c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt if (EAP_PWD_GET_LENGTH_BIT(lm_exch)) { 893c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt tot_len = WPA_GET_BE16(pos); 894c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt wpa_printf(MSG_DEBUG, "EAP-pwd: Incoming fragments, total " 895c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt "length = %d", tot_len); 896c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt data->inbuf = wpabuf_alloc(tot_len); 897c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt if (data->inbuf == NULL) { 898c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt wpa_printf(MSG_INFO, "EAP-pwd: Out of memory to " 899c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt "buffer fragments!"); 900c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt return; 901c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt } 902c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt pos += sizeof(u16); 903c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt len -= sizeof(u16); 904c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt } 905c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt /* 906c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt * the first and all intermediate fragments have the M bit set 907c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt */ 908c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt if (EAP_PWD_GET_MORE_BIT(lm_exch)) { 909c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt if ((data->in_frag_pos + len) > wpabuf_size(data->inbuf)) { 910c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt wpa_printf(MSG_DEBUG, "EAP-pwd: Buffer overflow " 911c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt "attack detected! (%d+%d > %d)", 912c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt (int) data->in_frag_pos, (int) len, 913c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt (int) wpabuf_size(data->inbuf)); 914c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt eap_pwd_state(data, FAILURE); 915c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt return; 916c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt } 917c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt wpabuf_put_data(data->inbuf, pos, len); 918c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt data->in_frag_pos += len; 919c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt wpa_printf(MSG_DEBUG, "EAP-pwd: Got a %d byte fragment", 920c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt (int) len); 921c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt return; 922c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt } 923c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt /* 924c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt * last fragment won't have the M bit set (but we're obviously 925c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt * buffering fragments so that's how we know it's the last) 926c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt */ 927c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt if (data->in_frag_pos) { 928c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt wpabuf_put_data(data->inbuf, pos, len); 929c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt data->in_frag_pos += len; 930c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt pos = wpabuf_head_u8(data->inbuf); 931c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt len = data->in_frag_pos; 932c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt wpa_printf(MSG_DEBUG, "EAP-pwd: Last fragment, %d bytes", 933c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt (int) len); 934c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt } 935c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt switch (EAP_PWD_GET_EXCHANGE(lm_exch)) { 9368d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt case EAP_PWD_OPCODE_ID_EXCH: 937c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt eap_pwd_process_id_resp(sm, data, pos, len); 9388d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt break; 9398d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt case EAP_PWD_OPCODE_COMMIT_EXCH: 940c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt eap_pwd_process_commit_resp(sm, data, pos, len); 9418d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt break; 942c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt case EAP_PWD_OPCODE_CONFIRM_EXCH: 943c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt eap_pwd_process_confirm_resp(sm, data, pos, len); 9448d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt break; 9458d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 946c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt /* 947c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt * if we had been buffering fragments, here's a great place 948c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt * to clean up 949c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt */ 950c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt if (data->in_frag_pos) { 951c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt wpabuf_free(data->inbuf); 952c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt data->in_frag_pos = 0; 953c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt } 9548d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt} 9558d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 9568d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 9578d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidtstatic u8 * eap_pwd_getkey(struct eap_sm *sm, void *priv, size_t *len) 9588d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt{ 9598d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt struct eap_pwd_data *data = priv; 9608d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt u8 *key; 9618d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 9628d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (data->state != SUCCESS) 9638d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return NULL; 9648d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 9658d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt key = os_malloc(EAP_MSK_LEN); 9668d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (key == NULL) 9678d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return NULL; 9688d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 9698d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt os_memcpy(key, data->msk, EAP_MSK_LEN); 9708d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt *len = EAP_MSK_LEN; 9718d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 9728d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return key; 9738d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt} 9748d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 9758d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 9768d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidtstatic u8 * eap_pwd_get_emsk(struct eap_sm *sm, void *priv, size_t *len) 9778d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt{ 9788d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt struct eap_pwd_data *data = priv; 9798d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt u8 *key; 9808d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 9818d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (data->state != SUCCESS) 9828d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return NULL; 9838d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 9848d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt key = os_malloc(EAP_EMSK_LEN); 9858d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (key == NULL) 9868d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return NULL; 9878d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 9888d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt os_memcpy(key, data->emsk, EAP_EMSK_LEN); 9898d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt *len = EAP_EMSK_LEN; 9908d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 9918d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return key; 9928d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt} 9938d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 9948d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 9958d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidtstatic Boolean eap_pwd_is_success(struct eap_sm *sm, void *priv) 9968d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt{ 9978d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt struct eap_pwd_data *data = priv; 9988d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return data->state == SUCCESS; 9998d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt} 10008d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 10018d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 10028d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidtstatic Boolean eap_pwd_is_done(struct eap_sm *sm, void *priv) 10038d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt{ 10048d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt struct eap_pwd_data *data = priv; 10058d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return (data->state == SUCCESS) || (data->state == FAILURE); 10068d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt} 10078d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 10088d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 10098d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidtint eap_server_pwd_register(void) 10108d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt{ 10118d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt struct eap_method *eap; 10128d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt int ret; 10138d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt struct timeval tp; 10148d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt struct timezone tz; 10158d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt u32 sr; 10168d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 10178d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt EVP_add_digest(EVP_sha256()); 10188d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 10198d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt sr = 0xdeaddada; 10208d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt (void) gettimeofday(&tp, &tz); 10218d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt sr ^= (tp.tv_sec ^ tp.tv_usec); 10228d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt srandom(sr); 10238d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 10248d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt eap = eap_server_method_alloc(EAP_SERVER_METHOD_INTERFACE_VERSION, 10258d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt EAP_VENDOR_IETF, EAP_TYPE_PWD, 10268d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt "PWD"); 10278d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (eap == NULL) 10288d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return -1; 10298d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 10308d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt eap->init = eap_pwd_init; 10318d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt eap->reset = eap_pwd_reset; 10328d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt eap->buildReq = eap_pwd_build_req; 10338d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt eap->check = eap_pwd_check; 10348d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt eap->process = eap_pwd_process; 10358d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt eap->isDone = eap_pwd_is_done; 10368d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt eap->getKey = eap_pwd_getkey; 10378d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt eap->get_emsk = eap_pwd_get_emsk; 10388d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt eap->isSuccess = eap_pwd_is_success; 10398d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 10408d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt ret = eap_server_method_register(eap); 10418d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (ret) 10428d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt eap_server_method_free(eap); 10438d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return ret; 10448d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt} 10458d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 1046