text: /*
   * EAP peer/server: EAP-SIM/AKA/AKA' shared routines
   * Copyright (c) 2004-2008, 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 "wpabuf.h"
  #include "crypto/aes_wrap.h"
  #include "crypto/crypto.h"
  #include "crypto/sha1.h"
  #include "crypto/sha256.h"
  #include "crypto/random.h"
  #include "eap_common/eap_defs.h"
  #include "eap_common/eap_sim_common.h"
  
  static int eap_sim_prf(const u8 *key, u8 *x, size_t xlen)
  {
  	return fips186_2_prf(key, EAP_SIM_MK_LEN, x, xlen);
  }
  
  void eap_sim_derive_mk(const u8 *identity, size_t identity_len, const u8 *nonce_mt, u16 selected_version, const u8 *ver_list, size_t ver_list_len, int num_chal, const u8 *kc, u8 *mk)
  {
  	u8 sel_ver[2];
  	const unsigned char *addr[5];
  	size_t len[5];
  
  	addr[0] = identity;
  	len[0] = identity_len;
  	addr[1] = kc;
  	len[1] = num_chal * EAP_SIM_KC_LEN;
  	addr[2] = nonce_mt;
  	len[2] = EAP_SIM_NONCE_MT_LEN;
  	addr[3] = ver_list;
  	len[3] = ver_list_len;
  	addr[4] = sel_ver;
  	len[4] = 2;
  
  	WPA_PUT_BE16(sel_ver, selected_version);
  
  	/* MK = SHA1(Identity|n*Kc|NONCE_MT|Version List|Selected Version) */
  	sha1_vector(5, addr, len, mk);
  	wpa_hexdump_key(MSG_DEBUG, "EAP-SIM: MK", mk, EAP_SIM_MK_LEN);
  }
  
  void eap_aka_derive_mk(const u8 *identity, size_t identity_len, const u8 *ik, const u8 *ck, u8 *mk)
  {
  	const u8 *addr[3];
  	size_t len[3];
  
  	addr[0] = identity;
  	len[0] = identity_len;
  	addr[1] = ik;
  	len[1] = EAP_AKA_IK_LEN;
  	addr[2] = ck;
  	len[2] = EAP_AKA_CK_LEN;
  
  	/* MK = SHA1(Identity|IK|CK) */
  	sha1_vector(3, addr, len, mk);
  	wpa_hexdump_key(MSG_DEBUG, "EAP-AKA: IK", ik, EAP_AKA_IK_LEN);
  	wpa_hexdump_key(MSG_DEBUG, "EAP-AKA: CK", ck, EAP_AKA_CK_LEN);
  	wpa_hexdump_key(MSG_DEBUG, "EAP-AKA: MK", mk, EAP_SIM_MK_LEN);
  }
  
  int eap_sim_derive_keys(const u8 *mk, u8 *k_encr, u8 *k_aut, u8 *msk, u8 *emsk)
  {
  	u8 buf[EAP_SIM_K_ENCR_LEN + EAP_SIM_K_AUT_LEN + EAP_SIM_KEYING_DATA_LEN + EAP_EMSK_LEN], *pos;
  	if (eap_sim_prf(mk, buf, sizeof(buf)) < 0) {
  		wpa_printf(MSG_ERROR, "EAP-SIM: Failed to derive keys");
  		return -1;
  	}
  	pos = buf;
  	os_memcpy(k_encr, pos, EAP_SIM_K_ENCR_LEN);
  	pos += EAP_SIM_K_ENCR_LEN;
  	os_memcpy(k_aut, pos, EAP_SIM_K_AUT_LEN);
  	pos += EAP_SIM_K_AUT_LEN;
  	os_memcpy(msk, pos, EAP_SIM_KEYING_DATA_LEN);
  	pos += EAP_SIM_KEYING_DATA_LEN;
  	os_memcpy(emsk, pos, EAP_EMSK_LEN);
  
  	wpa_hexdump_key(MSG_DEBUG, "EAP-SIM: K_encr", k_encr, EAP_SIM_K_ENCR_LEN);
  	wpa_hexdump_key(MSG_DEBUG, "EAP-SIM: K_aut", k_aut, EAP_SIM_K_AUT_LEN);
  	wpa_hexdump_key(MSG_DEBUG, "EAP-SIM: keying material (MSK)", msk, EAP_SIM_KEYING_DATA_LEN);
  	wpa_hexdump_key(MSG_DEBUG, "EAP-SIM: EMSK", emsk, EAP_EMSK_LEN);
  	os_memset(buf, 0, sizeof(buf));
  
  	return 0;
  }
  
  int eap_sim_derive_keys_reauth(u16 _counter, const u8 *identity, size_t identity_len, const u8 *nonce_s, const u8 *mk, u8 *msk, u8 *emsk)
  {
  	u8 xkey[SHA1_MAC_LEN];
  	u8 buf[EAP_SIM_KEYING_DATA_LEN + EAP_EMSK_LEN + 32];
  	u8 counter[2];
  	const u8 *addr[4];
  	size_t len[4];
  
  	while (identity_len > 0 && identity[identity_len - 1] == 0) {
  		wpa_printf(MSG_DEBUG, "EAP-SIM: Workaround - drop null " "character from the end of identity");
  		identity_len--;
  	}
  	addr[0] = identity;
  	len[0] = identity_len;
  	addr[1] = counter;
  	len[1] = 2;
  	addr[2] = nonce_s;
  	len[2] = EAP_SIM_NONCE_S_LEN;
  	addr[3] = mk;
  	len[3] = EAP_SIM_MK_LEN;
  
  	WPA_PUT_BE16(counter, _counter);
  
  	wpa_printf(MSG_DEBUG, "EAP-SIM: Deriving keying data from reauth");
  	wpa_hexdump_ascii(MSG_DEBUG, "EAP-SIM: Identity", identity, identity_len);
  	wpa_hexdump(MSG_DEBUG, "EAP-SIM: counter", counter, 2);
  	wpa_hexdump(MSG_DEBUG, "EAP-SIM: NONCE_S", nonce_s, EAP_SIM_NONCE_S_LEN);
  	wpa_hexdump_key(MSG_DEBUG, "EAP-SIM: MK", mk, EAP_SIM_MK_LEN);
  
  	/* XKEY' = SHA1(Identity|counter|NONCE_S|MK) */
  	sha1_vector(4, addr, len, xkey);
  	wpa_hexdump(MSG_DEBUG, "EAP-SIM: XKEY'", xkey, SHA1_MAC_LEN);
  
  	if (eap_sim_prf(xkey, buf, sizeof(buf)) < 0) {
  		wpa_printf(MSG_ERROR, "EAP-SIM: Failed to derive keys");
  		return -1;
  	}
  	if (msk) {
  		os_memcpy(msk, buf, EAP_SIM_KEYING_DATA_LEN);
  		wpa_hexdump(MSG_DEBUG, "EAP-SIM: keying material (MSK)", msk, EAP_SIM_KEYING_DATA_LEN);
  	}
  	if (emsk) {
  		os_memcpy(emsk, buf + EAP_SIM_KEYING_DATA_LEN, EAP_EMSK_LEN);
  		wpa_hexdump(MSG_DEBUG, "EAP-SIM: EMSK", emsk, EAP_EMSK_LEN);
  	}
  	os_memset(buf, 0, sizeof(buf));
  
  	return 0;
  }
  
  int eap_sim_verify_mac(const u8 *k_aut, const struct wpabuf *req, const u8 *mac, const u8 *extra, size_t extra_len)
  {
  	unsigned char hmac[SHA1_MAC_LEN];
  	const u8 *addr[2];
  	size_t len[2];
  	u8 *tmp;
  
  	if (mac == NULL || wpabuf_len(req) < EAP_SIM_MAC_LEN || mac < wpabuf_head_u8(req) || mac > wpabuf_head_u8(req) + wpabuf_len(req) - EAP_SIM_MAC_LEN) {
  		return -1;
  	}
  
  	tmp = os_malloc(wpabuf_len(req));
  	if (tmp == NULL) {
  		return -1;
  	}
  
  	addr[0] = tmp;
  	len[0] = wpabuf_len(req);
  	addr[1] = extra;
  	len[1] = extra_len;
  
  	/* HMAC-SHA1-128 */
  	os_memcpy(tmp, wpabuf_head(req), wpabuf_len(req));
  	os_memset(tmp + (mac - wpabuf_head_u8(req)), 0, EAP_SIM_MAC_LEN);
  	wpa_hexdump(MSG_MSGDUMP, "EAP-SIM: Verify MAC - msg", tmp, wpabuf_len(req));
  	wpa_hexdump(MSG_MSGDUMP, "EAP-SIM: Verify MAC - extra data", extra, extra_len);
  	wpa_hexdump_key(MSG_MSGDUMP, "EAP-SIM: Verify MAC - K_aut", k_aut, EAP_SIM_K_AUT_LEN);
  	hmac_sha1_vector(k_aut, EAP_SIM_K_AUT_LEN, 2, addr, len, hmac);
  	wpa_hexdump(MSG_MSGDUMP, "EAP-SIM: Verify MAC: MAC", hmac, EAP_SIM_MAC_LEN);
  	os_free(tmp);
  
  	return (os_memcmp_const(hmac, mac, EAP_SIM_MAC_LEN) == 0) ? 0 : 1;
  }
  
  void eap_sim_add_mac(const u8 *k_aut, const u8 *msg, size_t msg_len, u8 *mac, const u8 *extra, size_t extra_len)
  {
  	unsigned char hmac[SHA1_MAC_LEN];
  	const u8 *addr[2];
  	size_t len[2];
  
  	addr[0] = msg;
  	len[0] = msg_len;
  	addr[1] = extra;
  	len[1] = extra_len;
  
  	/* HMAC-SHA1-128 */
  	os_memset(mac, 0, EAP_SIM_MAC_LEN);
  	wpa_hexdump(MSG_MSGDUMP, "EAP-SIM: Add MAC - msg", msg, msg_len);
  	wpa_hexdump(MSG_MSGDUMP, "EAP-SIM: Add MAC - extra data", extra, extra_len);
  	wpa_hexdump_key(MSG_MSGDUMP, "EAP-SIM: Add MAC - K_aut", k_aut, EAP_SIM_K_AUT_LEN);
  	hmac_sha1_vector(k_aut, EAP_SIM_K_AUT_LEN, 2, addr, len, hmac);
  	os_memcpy(mac, hmac, EAP_SIM_MAC_LEN);
  	wpa_hexdump(MSG_MSGDUMP, "EAP-SIM: Add MAC: MAC", mac, EAP_SIM_MAC_LEN);
  }
  
  #if defined(EAP_AKA_PRIME) || defined(EAP_SERVER_AKA_PRIME)
  static void prf_prime(const u8 *k, const char *seed1, const u8 *seed2, size_t seed2_len, const u8 *seed3, size_t seed3_len, u8 *res, size_t res_len)
  {
  	const u8 *addr[5];
  	size_t len[5];
  	u8 hash[SHA256_MAC_LEN];
  	u8 iter;
  
  	/*
  	 * PRF'(K,S) = T1 | T2 | T3 | T4 | ...
  	 * T1 = HMAC-SHA-256 (K, S | 0x01)
  	 * T2 = HMAC-SHA-256 (K, T1 | S | 0x02)
  	 * T3 = HMAC-SHA-256 (K, T2 | S | 0x03)
  	 * T4 = HMAC-SHA-256 (K, T3 | S | 0x04)
  	 * ...
  	 */
  
  	addr[0] = hash;
  	len[0] = 0;
  	addr[1] = (const u8 *)seed1;
  	len[1] = os_strlen(seed1);
  	addr[2] = seed2;
  	len[2] = seed2_len;
  	addr[3] = seed3;
  	len[3] = seed3_len;
  	addr[4] = &iter;
  	len[4] = 1;
  
  	iter = 0;
  	while (res_len) {
  		size_t hlen;
  		iter++;
  		hmac_sha256_vector(k, 32, 5, addr, len, hash);
  		len[0] = SHA256_MAC_LEN;
  		hlen = res_len > SHA256_MAC_LEN ? SHA256_MAC_LEN : res_len;
  		os_memcpy(res, hash, hlen);
  		res += hlen;
  		res_len -= hlen;
  	}
  }
  
  void eap_aka_prime_derive_keys(const u8 *identity, size_t identity_len, const u8 *ik, const u8 *ck, u8 *k_encr, u8 *k_aut, u8 *k_re, u8 *msk, u8 *emsk)
  {
  	u8 key[EAP_AKA_IK_LEN + EAP_AKA_CK_LEN];
  	u8 keys[EAP_SIM_K_ENCR_LEN + EAP_AKA_PRIME_K_AUT_LEN + EAP_AKA_PRIME_K_RE_LEN + EAP_MSK_LEN + EAP_EMSK_LEN];
  	u8 *pos;
  
  	/*
  	 * MK = PRF'(IK'|CK',"EAP-AKA'"|Identity)
  	 * K_encr = MK[0..127]
  	 * K_aut  = MK[128..383]
  	 * K_re   = MK[384..639]
  	 * MSK    = MK[640..1151]
  	 * EMSK   = MK[1152..1663]
  	 */
  
  	os_memcpy(key, ik, EAP_AKA_IK_LEN);
  	os_memcpy(key + EAP_AKA_IK_LEN, ck, EAP_AKA_CK_LEN);
  
  	prf_prime(key, "EAP-AKA'", identity, identity_len, NULL, 0, keys, sizeof(keys));
  
  	pos = keys;
  	os_memcpy(k_encr, pos, EAP_SIM_K_ENCR_LEN);
  	wpa_hexdump_key(MSG_DEBUG, "EAP-AKA': K_encr", k_encr, EAP_SIM_K_ENCR_LEN);
  	pos += EAP_SIM_K_ENCR_LEN;
  
  	os_memcpy(k_aut, pos, EAP_AKA_PRIME_K_AUT_LEN);
  	wpa_hexdump_key(MSG_DEBUG, "EAP-AKA': K_aut", k_aut, EAP_AKA_PRIME_K_AUT_LEN);
  	pos += EAP_AKA_PRIME_K_AUT_LEN;
  
  	os_memcpy(k_re, pos, EAP_AKA_PRIME_K_RE_LEN);
  	wpa_hexdump_key(MSG_DEBUG, "EAP-AKA': K_re", k_re, EAP_AKA_PRIME_K_RE_LEN);
  	pos += EAP_AKA_PRIME_K_RE_LEN;
  
  	os_memcpy(msk, pos, EAP_MSK_LEN);
  	wpa_hexdump_key(MSG_DEBUG, "EAP-AKA': MSK", msk, EAP_MSK_LEN);
  	pos += EAP_MSK_LEN;
  
  	os_memcpy(emsk, pos, EAP_EMSK_LEN);
  	wpa_hexdump_key(MSG_DEBUG, "EAP-AKA': EMSK", emsk, EAP_EMSK_LEN);
  }
  
  int eap_aka_prime_derive_keys_reauth(const u8 *k_re, u16 counter, const u8 *identity, size_t identity_len, const u8 *nonce_s, u8 *msk, u8 *emsk)
  {
  	u8 seed3[2 + EAP_SIM_NONCE_S_LEN];
  	u8 keys[EAP_MSK_LEN + EAP_EMSK_LEN];
  	u8 *pos;
  
  	/*
  	 * MK = PRF'(K_re,"EAP-AKA' re-auth"|Identity|counter|NONCE_S)
  	 * MSK  = MK[0..511]
  	 * EMSK = MK[512..1023]
  	 */
  
  	WPA_PUT_BE16(seed3, counter);
  	os_memcpy(seed3 + 2, nonce_s, EAP_SIM_NONCE_S_LEN);
  
  	prf_prime(k_re, "EAP-AKA' re-auth", identity, identity_len, seed3, sizeof(seed3), keys, sizeof(keys));
  
  	pos = keys;
  	os_memcpy(msk, pos, EAP_MSK_LEN);
  	wpa_hexdump_key(MSG_DEBUG, "EAP-AKA': MSK", msk, EAP_MSK_LEN);
  	pos += EAP_MSK_LEN;
  
  	os_memcpy(emsk, pos, EAP_EMSK_LEN);
  	wpa_hexdump_key(MSG_DEBUG, "EAP-AKA': EMSK", emsk, EAP_EMSK_LEN);
  
  	os_memset(keys, 0, sizeof(keys));
  
  	return 0;
  }
  
  int eap_sim_verify_mac_sha256(const u8 *k_aut, const struct wpabuf *req, const u8 *mac, const u8 *extra, size_t extra_len)
  {
  	unsigned char hmac[SHA256_MAC_LEN];
  	const u8 *addr[2];
  	size_t len[2];
  	u8 *tmp;
  
  	if (mac == NULL || wpabuf_len(req) < EAP_SIM_MAC_LEN || mac < wpabuf_head_u8(req) || mac > wpabuf_head_u8(req) + wpabuf_len(req) - EAP_SIM_MAC_LEN) {
  		return -1;
  	}
  
  	tmp = os_malloc(wpabuf_len(req));
  	if (tmp == NULL) {
  		return -1;
  	}
  
  	addr[0] = tmp;
  	len[0] = wpabuf_len(req);
  	addr[1] = extra;
  	len[1] = extra_len;
  
  	/* HMAC-SHA-256-128 */
  	os_memcpy(tmp, wpabuf_head(req), wpabuf_len(req));
  	os_memset(tmp + (mac - wpabuf_head_u8(req)), 0, EAP_SIM_MAC_LEN);
  	wpa_hexdump(MSG_MSGDUMP, "EAP-AKA': Verify MAC - msg", tmp, wpabuf_len(req));
  	wpa_hexdump(MSG_MSGDUMP, "EAP-AKA': Verify MAC - extra data", extra, extra_len);
  	wpa_hexdump_key(MSG_MSGDUMP, "EAP-AKA': Verify MAC - K_aut", k_aut, EAP_AKA_PRIME_K_AUT_LEN);
  	hmac_sha256_vector(k_aut, EAP_AKA_PRIME_K_AUT_LEN, 2, addr, len, hmac);
  	wpa_hexdump(MSG_MSGDUMP, "EAP-AKA': Verify MAC: MAC", hmac, EAP_SIM_MAC_LEN);
  	os_free(tmp);
  
  	return (os_memcmp_const(hmac, mac, EAP_SIM_MAC_LEN) == 0) ? 0 : 1;
  }
  
  void eap_sim_add_mac_sha256(const u8 *k_aut, const u8 *msg, size_t msg_len, u8 *mac, const u8 *extra, size_t extra_len)
  {
  	unsigned char hmac[SHA256_MAC_LEN];
  	const u8 *addr[2];
  	size_t len[2];
  
  	addr[0] = msg;
  	len[0] = msg_len;
  	addr[1] = extra;
  	len[1] = extra_len;
  
  	/* HMAC-SHA-256-128 */
  	os_memset(mac, 0, EAP_SIM_MAC_LEN);
  	wpa_hexdump(MSG_MSGDUMP, "EAP-AKA': Add MAC - msg", msg, msg_len);
  	wpa_hexdump(MSG_MSGDUMP, "EAP-AKA': Add MAC - extra data", extra, extra_len);
  	wpa_hexdump_key(MSG_MSGDUMP, "EAP-AKA': Add MAC - K_aut", k_aut, EAP_AKA_PRIME_K_AUT_LEN);
  	hmac_sha256_vector(k_aut, EAP_AKA_PRIME_K_AUT_LEN, 2, addr, len, hmac);
  	os_memcpy(mac, hmac, EAP_SIM_MAC_LEN);
  	wpa_hexdump(MSG_MSGDUMP, "EAP-AKA': Add MAC: MAC", mac, EAP_SIM_MAC_LEN);
  }
  
  void eap_aka_prime_derive_ck_ik_prime(u8 *ck, u8 *ik, const u8 *sqn_ak, const u8 *network_name, size_t network_name_len)
  {
  	u8 key[EAP_AKA_CK_LEN + EAP_AKA_IK_LEN];
  	u8 hash[SHA256_MAC_LEN];
  	const u8 *addr[5];
  	size_t len[5];
  	u8 fc;
  	u8 l0[2], l1[2];
  
  	/* 3GPP TS 33.402 V8.0.0
  	 * (CK', IK') = F(CK, IK, <access network identity>)
  	 */
  	/* TODO: CK', IK' generation should really be moved into the actual
  	 * AKA procedure with network name passed in there and option to use
  	 * AMF separation bit = 1 (3GPP TS 33.401). */
  
  	/* Change Request 33.402 CR 0033 to version 8.1.1 from
  	 * 3GPP TSG-SA WG3 Meeting #53 in September 2008:
  	 *
  	 * CK' || IK' = HMAC-SHA-256(Key, S)
  	 * S = FC || P0 || L0 || P1 || L1 || ... || Pn || Ln
  	 * Key = CK || IK
  	 * FC = 0x20
  	 * P0 = access network identity (3GPP TS 24.302)
  	 * L0 = length of acceess network identity (2 octets, big endian)
  	 * P1 = SQN xor AK (if AK is not used, AK is treaded as 000..0
  	 * L1 = 0x00 0x06
  	 */
  
  	fc = 0x20;
  
  	wpa_printf(MSG_DEBUG, "EAP-AKA': Derive (CK',IK') from (CK,IK)");
  	wpa_hexdump_key(MSG_DEBUG, "EAP-AKA': CK", ck, EAP_AKA_CK_LEN);
  	wpa_hexdump_key(MSG_DEBUG, "EAP-AKA': IK", ik, EAP_AKA_IK_LEN);
  	wpa_printf(MSG_DEBUG, "EAP-AKA': FC = 0x%x", fc);
  	wpa_hexdump_ascii(MSG_DEBUG, "EAP-AKA': P0 = Access network identity", network_name, network_name_len);
  	wpa_hexdump(MSG_DEBUG, "EAP-AKA': P1 = SQN xor AK", sqn_ak, 6);
  
  	os_memcpy(key, ck, EAP_AKA_CK_LEN);
  	os_memcpy(key + EAP_AKA_CK_LEN, ik, EAP_AKA_IK_LEN);
  	wpa_hexdump_key(MSG_DEBUG, "EAP-AKA': Key = CK || IK", key, sizeof(key));
  
  	addr[0] = &fc;
  	len[0] = 1;
  	addr[1] = network_name;
  	len[1] = network_name_len;
  	WPA_PUT_BE16(l0, network_name_len);
  	addr[2] = l0;
  	len[2] = 2;
  	addr[3] = sqn_ak;
  	len[3] = 6;
  	WPA_PUT_BE16(l1, 6);
  	addr[4] = l1;
  	len[4] = 2;
  
  	hmac_sha256_vector(key, sizeof(key), 5, addr, len, hash);
  	wpa_hexdump_key(MSG_DEBUG, "EAP-AKA': KDF output (CK' || IK')", hash, sizeof(hash));
  
  	os_memcpy(ck, hash, EAP_AKA_CK_LEN);
  	os_memcpy(ik, hash + EAP_AKA_CK_LEN, EAP_AKA_IK_LEN);
  	wpa_hexdump_key(MSG_DEBUG, "EAP-AKA': CK'", ck, EAP_AKA_CK_LEN);
  	wpa_hexdump_key(MSG_DEBUG, "EAP-AKA': IK'", ik, EAP_AKA_IK_LEN);
  }
  #endif							/* EAP_AKA_PRIME || EAP_SERVER_AKA_PRIME */
  
  int eap_sim_parse_attr(const u8 *start, const u8 *end, struct eap_sim_attrs *attr, int aka, int encr)
  {
  	const u8 *pos = start, *apos;
  	size_t alen, plen, i, list_len;
  
  	os_memset(attr, 0, sizeof(*attr));
  	attr->id_req = NO_ID_REQ;
  	attr->notification = -1;
  	attr->counter = -1;
  	attr->selected_version = -1;
  	attr->client_error_code = -1;
  
  	while (pos < end) {
  		if (pos + 2 > end) {
  			wpa_printf(MSG_INFO, "EAP-SIM: Attribute overflow(1)");
  			return -1;
  		}
  		wpa_printf(MSG_MSGDUMP, "EAP-SIM: Attribute: Type=%d Len=%d", pos[0], pos[1] * 4);
  		if (pos + pos[1] * 4 > end) {
  			wpa_printf(MSG_INFO, "EAP-SIM: Attribute overflow " "(pos=%p len=%d end=%p)", pos, pos[1] * 4, end);
  			return -1;
  		}
  		if (pos[1] == 0) {
  			wpa_printf(MSG_INFO, "EAP-SIM: Attribute underflow");
  			return -1;
  		}
  		apos = pos + 2;
  		alen = pos[1] * 4 - 2;
  		wpa_hexdump(MSG_MSGDUMP, "EAP-SIM: Attribute data", apos, alen);
  
  		switch (pos[0]) {
  		case EAP_SIM_AT_RAND:
  			wpa_printf(MSG_DEBUG, "EAP-SIM: AT_RAND");
  			apos += 2;
  			alen -= 2;
  			if ((!aka && (alen % GSM_RAND_LEN)) || (aka && alen != EAP_AKA_RAND_LEN)) {
  				wpa_printf(MSG_INFO, "EAP-SIM: Invalid AT_RAND" " (len %lu)", (unsigned long)alen);
  				return -1;
  			}
  			attr->rand = apos;
  			attr->num_chal = alen / GSM_RAND_LEN;
  			break;
  		case EAP_SIM_AT_AUTN:
  			wpa_printf(MSG_DEBUG, "EAP-AKA: AT_AUTN");
  			if (!aka) {
  				wpa_printf(MSG_DEBUG, "EAP-SIM: " "Unexpected AT_AUTN");
  				return -1;
  			}
  			apos += 2;
  			alen -= 2;
  			if (alen != EAP_AKA_AUTN_LEN) {
  				wpa_printf(MSG_INFO, "EAP-AKA: Invalid AT_AUTN" " (len %lu)", (unsigned long)alen);
  				return -1;
  			}
  			attr->autn = apos;
  			break;
  		case EAP_SIM_AT_PADDING:
  			if (!encr) {
  				wpa_printf(MSG_ERROR, "EAP-SIM: Unencrypted " "AT_PADDING");
  				return -1;
  			}
  			wpa_printf(MSG_DEBUG, "EAP-SIM: (encr) AT_PADDING");
  			for (i = 2; i < alen; i++) {
  				if (apos[i] != 0) {
  					wpa_printf(MSG_INFO, "EAP-SIM: (encr) " "AT_PADDING used a non-zero" " padding byte");
  					wpa_hexdump(MSG_DEBUG, "EAP-SIM: " "(encr) padding bytes", apos + 2, alen - 2);
  					return -1;
  				}
  			}
  			break;
  		case EAP_SIM_AT_NONCE_MT:
  			wpa_printf(MSG_DEBUG, "EAP-SIM: AT_NONCE_MT");
  			if (alen != 2 + EAP_SIM_NONCE_MT_LEN) {
  				wpa_printf(MSG_INFO, "EAP-SIM: Invalid " "AT_NONCE_MT length");
  				return -1;
  			}
  			attr->nonce_mt = apos + 2;
  			break;
  		case EAP_SIM_AT_PERMANENT_ID_REQ:
  			wpa_printf(MSG_DEBUG, "EAP-SIM: AT_PERMANENT_ID_REQ");
  			attr->id_req = PERMANENT_ID;
  			break;
  		case EAP_SIM_AT_MAC:
  			wpa_printf(MSG_DEBUG, "EAP-SIM: AT_MAC");
  			if (alen != 2 + EAP_SIM_MAC_LEN) {
  				wpa_printf(MSG_INFO, "EAP-SIM: Invalid AT_MAC " "length");
  				return -1;
  			}
  			attr->mac = apos + 2;
  			break;
  		case EAP_SIM_AT_NOTIFICATION:
  			if (alen != 2) {
  				wpa_printf(MSG_INFO, "EAP-SIM: Invalid " "AT_NOTIFICATION length %lu", (unsigned long)alen);
  				return -1;
  			}
  			attr->notification = apos[0] * 256 + apos[1];
  			wpa_printf(MSG_DEBUG, "EAP-SIM: AT_NOTIFICATION %d", attr->notification);
  			break;
  		case EAP_SIM_AT_ANY_ID_REQ:
  			wpa_printf(MSG_DEBUG, "EAP-SIM: AT_ANY_ID_REQ");
  			attr->id_req = ANY_ID;
  			break;
  		case EAP_SIM_AT_IDENTITY:
  			wpa_printf(MSG_DEBUG, "EAP-SIM: AT_IDENTITY");
  			plen = WPA_GET_BE16(apos);
  			apos += 2;
  			alen -= 2;
  			if (plen > alen) {
  				wpa_printf(MSG_INFO, "EAP-SIM: Invalid " "AT_IDENTITY (Actual Length %lu, " "remaining length %lu)", (unsigned long)plen, (unsigned long)alen);
  				return -1;
  			}
  
  			attr->identity = apos;
  			attr->identity_len = plen;
  			break;
  		case EAP_SIM_AT_VERSION_LIST:
  			if (aka) {
  				wpa_printf(MSG_DEBUG, "EAP-AKA: " "Unexpected AT_VERSION_LIST");
  				return -1;
  			}
  			list_len = apos[0] * 256 + apos[1];
  			wpa_printf(MSG_DEBUG, "EAP-SIM: AT_VERSION_LIST");
  			if (list_len < 2 || list_len > alen - 2) {
  				wpa_printf(MSG_WARNING, "EAP-SIM: Invalid " "AT_VERSION_LIST (list_len=%lu " "attr_len=%lu)", (unsigned long)list_len, (unsigned long)alen);
  				return -1;
  			}
  			attr->version_list = apos + 2;
  			attr->version_list_len = list_len;
  			break;
  		case EAP_SIM_AT_SELECTED_VERSION:
  			wpa_printf(MSG_DEBUG, "EAP-SIM: AT_SELECTED_VERSION");
  			if (alen != 2) {
  				wpa_printf(MSG_INFO, "EAP-SIM: Invalid " "AT_SELECTED_VERSION length %lu", (unsigned long)alen);
  				return -1;
  			}
  			attr->selected_version = apos[0] * 256 + apos[1];
  			wpa_printf(MSG_DEBUG, "EAP-SIM: AT_SELECTED_VERSION " "%d", attr->selected_version);
  			break;
  		case EAP_SIM_AT_FULLAUTH_ID_REQ:
  			wpa_printf(MSG_DEBUG, "EAP-SIM: AT_FULLAUTH_ID_REQ");
  			attr->id_req = FULLAUTH_ID;
  			break;
  		case EAP_SIM_AT_COUNTER:
  			if (!encr) {
  				wpa_printf(MSG_ERROR, "EAP-SIM: Unencrypted " "AT_COUNTER");
  				return -1;
  			}
  			if (alen != 2) {
  				wpa_printf(MSG_INFO, "EAP-SIM: (encr) Invalid " "AT_COUNTER (alen=%lu)", (unsigned long)alen);
  				return -1;
  			}
  			attr->counter = apos[0] * 256 + apos[1];
  			wpa_printf(MSG_DEBUG, "EAP-SIM: (encr) AT_COUNTER %d", attr->counter);
  			break;
  		case EAP_SIM_AT_COUNTER_TOO_SMALL:
  			if (!encr) {
  				wpa_printf(MSG_ERROR, "EAP-SIM: Unencrypted " "AT_COUNTER_TOO_SMALL");
  				return -1;
  			}
  			if (alen != 2) {
  				wpa_printf(MSG_INFO, "EAP-SIM: (encr) Invalid " "AT_COUNTER_TOO_SMALL (alen=%lu)", (unsigned long)alen);
  				return -1;
  			}
  			wpa_printf(MSG_DEBUG, "EAP-SIM: (encr) " "AT_COUNTER_TOO_SMALL");
  			attr->counter_too_small = 1;
  			break;
  		case EAP_SIM_AT_NONCE_S:
  			if (!encr) {
  				wpa_printf(MSG_ERROR, "EAP-SIM: Unencrypted " "AT_NONCE_S");
  				return -1;
  			}
  			wpa_printf(MSG_DEBUG, "EAP-SIM: (encr) " "AT_NONCE_S");
  			if (alen != 2 + EAP_SIM_NONCE_S_LEN) {
  				wpa_printf(MSG_INFO, "EAP-SIM: (encr) Invalid " "AT_NONCE_S (alen=%lu)", (unsigned long)alen);
  				return -1;
  			}
  			attr->nonce_s = apos + 2;
  			break;
  		case EAP_SIM_AT_CLIENT_ERROR_CODE:
  			if (alen != 2) {
  				wpa_printf(MSG_INFO, "EAP-SIM: Invalid " "AT_CLIENT_ERROR_CODE length %lu", (unsigned long)alen);
  				return -1;
  			}
  			attr->client_error_code = apos[0] * 256 + apos[1];
  			wpa_printf(MSG_DEBUG, "EAP-SIM: AT_CLIENT_ERROR_CODE " "%d", attr->client_error_code);
  			break;
  		case EAP_SIM_AT_IV:
  			wpa_printf(MSG_DEBUG, "EAP-SIM: AT_IV");
  			if (alen != 2 + EAP_SIM_MAC_LEN) {
  				wpa_printf(MSG_INFO, "EAP-SIM: Invalid AT_IV " "length %lu", (unsigned long)alen);
  				return -1;
  			}
  			attr->iv = apos + 2;
  			break;
  		case EAP_SIM_AT_ENCR_DATA:
  			wpa_printf(MSG_DEBUG, "EAP-SIM: AT_ENCR_DATA");
  			attr->encr_data = apos + 2;
  			attr->encr_data_len = alen - 2;
  			if (attr->encr_data_len % 16) {
  				wpa_printf(MSG_INFO, "EAP-SIM: Invalid " "AT_ENCR_DATA length %lu", (unsigned long)
  						   attr->encr_data_len);
  				return -1;
  			}
  			break;
  		case EAP_SIM_AT_NEXT_PSEUDONYM:
  			if (!encr) {
  				wpa_printf(MSG_ERROR, "EAP-SIM: Unencrypted " "AT_NEXT_PSEUDONYM");
  				return -1;
  			}
  			wpa_printf(MSG_DEBUG, "EAP-SIM: (encr) " "AT_NEXT_PSEUDONYM");
  			plen = apos[0] * 256 + apos[1];
  			if (plen > alen - 2) {
  				wpa_printf(MSG_INFO, "EAP-SIM: (encr) Invalid" " AT_NEXT_PSEUDONYM (actual" " len %lu, attr len %lu)", (unsigned long)plen, (unsigned long)alen);
  				return -1;
  			}
  			attr->next_pseudonym = pos + 4;
  			attr->next_pseudonym_len = plen;
  			break;
  		case EAP_SIM_AT_NEXT_REAUTH_ID:
  			if (!encr) {
  				wpa_printf(MSG_ERROR, "EAP-SIM: Unencrypted " "AT_NEXT_REAUTH_ID");
  				return -1;
  			}
  			wpa_printf(MSG_DEBUG, "EAP-SIM: (encr) " "AT_NEXT_REAUTH_ID");
  			plen = apos[0] * 256 + apos[1];
  			if (plen > alen - 2) {
  				wpa_printf(MSG_INFO, "EAP-SIM: (encr) Invalid" " AT_NEXT_REAUTH_ID (actual" " len %lu, attr len %lu)", (unsigned long)plen, (unsigned long)alen);
  				return -1;
  			}
  			attr->next_reauth_id = pos + 4;
  			attr->next_reauth_id_len = plen;
  			break;
  		case EAP_SIM_AT_RES:
  			wpa_printf(MSG_DEBUG, "EAP-SIM: AT_RES");
  			attr->res_len_bits = WPA_GET_BE16(apos);
  			apos += 2;
  			alen -= 2;
  			if (!aka || alen < EAP_AKA_MIN_RES_LEN || alen > EAP_AKA_MAX_RES_LEN) {
  				wpa_printf(MSG_INFO, "EAP-SIM: Invalid AT_RES " "(len %lu)", (unsigned long)alen);
  				return -1;
  			}
  			attr->res = apos;
  			attr->res_len = alen;
  			break;
  		case EAP_SIM_AT_AUTS:
  			wpa_printf(MSG_DEBUG, "EAP-AKA: AT_AUTS");
  			if (!aka) {
  				wpa_printf(MSG_DEBUG, "EAP-SIM: " "Unexpected AT_AUTS");
  				return -1;
  			}
  			if (alen != EAP_AKA_AUTS_LEN) {
  				wpa_printf(MSG_INFO, "EAP-AKA: Invalid AT_AUTS" " (len %lu)", (unsigned long)alen);
  				return -1;
  			}
  			attr->auts = apos;
  			break;
  		case EAP_SIM_AT_CHECKCODE:
  			wpa_printf(MSG_DEBUG, "EAP-AKA: AT_CHECKCODE");
  			if (!aka) {
  				wpa_printf(MSG_DEBUG, "EAP-SIM: " "Unexpected AT_CHECKCODE");
  				return -1;
  			}
  			apos += 2;
  			alen -= 2;
  			if (alen != 0 && alen != EAP_AKA_CHECKCODE_LEN && alen != EAP_AKA_PRIME_CHECKCODE_LEN) {
  				wpa_printf(MSG_INFO, "EAP-AKA: Invalid " "AT_CHECKCODE (len %lu)", (unsigned long)alen);
  				return -1;
  			}
  			attr->checkcode = apos;
  			attr->checkcode_len = alen;
  			break;
  		case EAP_SIM_AT_RESULT_IND:
  			if (encr) {
  				wpa_printf(MSG_ERROR, "EAP-SIM: Encrypted " "AT_RESULT_IND");
  				return -1;
  			}
  			if (alen != 2) {
  				wpa_printf(MSG_INFO, "EAP-SIM: Invalid " "AT_RESULT_IND (alen=%lu)", (unsigned long)alen);
  				return -1;
  			}
  			wpa_printf(MSG_DEBUG, "EAP-SIM: AT_RESULT_IND");
  			attr->result_ind = 1;
  			break;
  #if defined(EAP_AKA_PRIME) || defined(EAP_SERVER_AKA_PRIME)
  		case EAP_SIM_AT_KDF_INPUT:
  			if (aka != 2) {
  				wpa_printf(MSG_INFO, "EAP-AKA: Unexpected " "AT_KDF_INPUT");
  				return -1;
  			}
  
  			wpa_printf(MSG_DEBUG, "EAP-AKA: AT_KDF_INPUT");
  			plen = WPA_GET_BE16(apos);
  			apos += 2;
  			alen -= 2;
  			if (plen > alen) {
  				wpa_printf(MSG_INFO, "EAP-AKA': Invalid " "AT_KDF_INPUT (Actual Length %lu, " "remaining length %lu)", (unsigned long)plen, (unsigned long)alen);
  				return -1;
  			}
  			attr->kdf_input = apos;
  			attr->kdf_input_len = plen;
  			break;
  		case EAP_SIM_AT_KDF:
  			if (aka != 2) {
  				wpa_printf(MSG_INFO, "EAP-AKA: Unexpected " "AT_KDF");
  				return -1;
  			}
  
  			wpa_printf(MSG_DEBUG, "EAP-AKA: AT_KDF");
  			if (alen != 2) {
  				wpa_printf(MSG_INFO, "EAP-AKA': Invalid " "AT_KDF (len %lu)", (unsigned long)alen);
  				return -1;
  			}
  			if (attr->kdf_count == EAP_AKA_PRIME_KDF_MAX) {
  				wpa_printf(MSG_DEBUG, "EAP-AKA': Too many " "AT_KDF attributes - ignore this");
  				break;
  			}
  			attr->kdf[attr->kdf_count] = WPA_GET_BE16(apos);
  			attr->kdf_count++;
  			break;
  		case EAP_SIM_AT_BIDDING:
  			wpa_printf(MSG_DEBUG, "EAP-AKA: AT_BIDDING");
  			if (alen != 2) {
  				wpa_printf(MSG_INFO, "EAP-AKA: Invalid " "AT_BIDDING (len %lu)", (unsigned long)alen);
  				return -1;
  			}
  			attr->bidding = apos;
  			break;
  #endif							/* EAP_AKA_PRIME || EAP_SERVER_AKA_PRIME */
  		default:
  			if (pos[0] < 128) {
  				wpa_printf(MSG_INFO, "EAP-SIM: Unrecognized " "non-skippable attribute %d", pos[0]);
  				return -1;
  			}
  
  			wpa_printf(MSG_DEBUG, "EAP-SIM: Unrecognized skippable" " attribute %d ignored", pos[0]);
  			break;
  		}
  
  		pos += pos[1] * 4;
  	}
  
  	wpa_printf(MSG_DEBUG, "EAP-SIM: Attributes parsed successfully " "(aka=%d encr=%d)", aka, encr);
  
  	return 0;
  }
  
  u8 *eap_sim_parse_encr(const u8 *k_encr, const u8 *encr_data, size_t encr_data_len, const u8 *iv, struct eap_sim_attrs *attr, int aka)
  {
  	u8 *decrypted;
  
  	if (!iv) {
  		wpa_printf(MSG_INFO, "EAP-SIM: Encrypted data, but no IV");
  		return NULL;
  	}
  
  	decrypted = os_malloc(encr_data_len);
  	if (decrypted == NULL) {
  		return NULL;
  	}
  	os_memcpy(decrypted, encr_data, encr_data_len);
  
  	if (aes_128_cbc_decrypt(k_encr, iv, decrypted, encr_data_len)) {
  		os_free(decrypted);
  		return NULL;
  	}
  	wpa_hexdump(MSG_MSGDUMP, "EAP-SIM: Decrypted AT_ENCR_DATA", decrypted, encr_data_len);
  
  	if (eap_sim_parse_attr(decrypted, decrypted + encr_data_len, attr, aka, 1)) {
  		wpa_printf(MSG_INFO, "EAP-SIM: (encr) Failed to parse " "decrypted AT_ENCR_DATA");
  		os_free(decrypted);
  		return NULL;
  	}
  
  	return decrypted;
  }
  
  #define EAP_SIM_INIT_LEN 128
  
  struct eap_sim_msg {
  	struct wpabuf *buf;
  	size_t mac, iv, encr;		/* index from buf */
  };
  
  struct eap_sim_msg *eap_sim_msg_init(int code, int id, int type, int subtype)
  {
  	struct eap_sim_msg *msg;
  	struct eap_hdr *eap;
  	u8 *pos;
  
  	msg = os_zalloc(sizeof(*msg));
  	if (msg == NULL) {
  		return NULL;
  	}
  
  	msg->buf = wpabuf_alloc(EAP_SIM_INIT_LEN);
  	if (msg->buf == NULL) {
  		os_free(msg);
  		return NULL;
  	}
  	eap = wpabuf_put(msg->buf, sizeof(*eap));
  	eap->code = code;
  	eap->identifier = id;
  
  	pos = wpabuf_put(msg->buf, 4);
  	*pos++ = type;
  	*pos++ = subtype;
  	*pos++ = 0;					/* Reserved */
  	*pos++ = 0;					/* Reserved */
  
  	return msg;
  }
  
  struct wpabuf *eap_sim_msg_finish(struct eap_sim_msg *msg, int type, const u8 *k_aut, const u8 *extra, size_t extra_len)
  {
  	struct eap_hdr *eap;
  	struct wpabuf *buf;
  
  	if (msg == NULL) {
  		return NULL;
  	}
  
  	eap = wpabuf_mhead(msg->buf);
  	eap->length = host_to_be16(wpabuf_len(msg->buf));
  
  #if defined(EAP_AKA_PRIME) || defined(EAP_SERVER_AKA_PRIME)
  	if (k_aut && msg->mac && type == EAP_TYPE_AKA_PRIME) {
  		eap_sim_add_mac_sha256(k_aut, (u8 *)wpabuf_head(msg->buf), wpabuf_len(msg->buf), (u8 *)wpabuf_mhead(msg->buf) + msg->mac, extra, extra_len);
  	} else
  #endif							/* EAP_AKA_PRIME || EAP_SERVER_AKA_PRIME */
  		if (k_aut && msg->mac) {
  			eap_sim_add_mac(k_aut, (u8 *)wpabuf_head(msg->buf), wpabuf_len(msg->buf), (u8 *)wpabuf_mhead(msg->buf) + msg->mac, extra, extra_len);
  		}
  
  	buf = msg->buf;
  	os_free(msg);
  	return buf;
  }
  
  void eap_sim_msg_free(struct eap_sim_msg *msg)
  {
  	if (msg) {
  		wpabuf_free(msg->buf);
  		os_free(msg);
  	}
  }
  
  u8 *eap_sim_msg_add_full(struct eap_sim_msg *msg, u8 attr, const u8 *data, size_t len)
  {
  	int attr_len = 2 + len;
  	int pad_len;
  	u8 *start;
  
  	if (msg == NULL) {
  		return NULL;
  	}
  
  	pad_len = (4 - attr_len % 4) % 4;
  	attr_len += pad_len;
  	if (wpabuf_resize(&msg->buf, attr_len)) {
  		return NULL;
  	}
  	start = wpabuf_put(msg->buf, 0);
  	wpabuf_put_u8(msg->buf, attr);
  	wpabuf_put_u8(msg->buf, attr_len / 4);
  	wpabuf_put_data(msg->buf, data, len);
  	if (pad_len) {
  		os_memset(wpabuf_put(msg->buf, pad_len), 0, pad_len);
  	}
  	return start;
  }
  
  u8 *eap_sim_msg_add(struct eap_sim_msg *msg, u8 attr, u16 value, const u8 *data, size_t len)
  {
  	int attr_len = 4 + len;
  	int pad_len;
  	u8 *start;
  
  	if (msg == NULL) {
  		return NULL;
  	}
  
  	pad_len = (4 - attr_len % 4) % 4;
  	attr_len += pad_len;
  	if (wpabuf_resize(&msg->buf, attr_len)) {
  		return NULL;
  	}
  	start = wpabuf_put(msg->buf, 0);
  	wpabuf_put_u8(msg->buf, attr);
  	wpabuf_put_u8(msg->buf, attr_len / 4);
  	wpabuf_put_be16(msg->buf, value);
  	if (data) {
  		wpabuf_put_data(msg->buf, data, len);
  	} else {
  		wpabuf_put(msg->buf, len);
  	}
  	if (pad_len) {
  		os_memset(wpabuf_put(msg->buf, pad_len), 0, pad_len);
  	}
  	return start;
  }
  
  u8 *eap_sim_msg_add_mac(struct eap_sim_msg *msg, u8 attr)
  {
  	u8 *pos = eap_sim_msg_add(msg, attr, 0, NULL, EAP_SIM_MAC_LEN);
  	if (pos) {
  		msg->mac = (pos - wpabuf_head_u8(msg->buf)) + 4;
  	}
  	return pos;
  }
  
  int eap_sim_msg_add_encr_start(struct eap_sim_msg *msg, u8 attr_iv, u8 attr_encr)
  {
  	u8 *pos = eap_sim_msg_add(msg, attr_iv, 0, NULL, EAP_SIM_IV_LEN);
  	if (pos == NULL) {
  		return -1;
  	}
  	msg->iv = (pos - wpabuf_head_u8(msg->buf)) + 4;
  	if (random_get_bytes(wpabuf_mhead_u8(msg->buf) + msg->iv, EAP_SIM_IV_LEN)) {
  		msg->iv = 0;
  		return -1;
  	}
  
  	pos = eap_sim_msg_add(msg, attr_encr, 0, NULL, 0);
  	if (pos == NULL) {
  		msg->iv = 0;
  		return -1;
  	}
  	msg->encr = pos - wpabuf_head_u8(msg->buf);
  
  	return 0;
  }
  
  int eap_sim_msg_add_encr_end(struct eap_sim_msg *msg, u8 *k_encr, int attr_pad)
  {
  	size_t encr_len;
  
  	if (msg == NULL || k_encr == NULL || msg->iv == 0 || msg->encr == 0) {
  		return -1;
  	}
  
  	encr_len = wpabuf_len(msg->buf) - msg->encr - 4;
  	if (encr_len % 16) {
  		u8 *pos;
  		int pad_len = 16 - (encr_len % 16);
  		if (pad_len < 4) {
  			wpa_printf(MSG_WARNING, "EAP-SIM: " "eap_sim_msg_add_encr_end - invalid pad_len" " %d", pad_len);
  			return -1;
  		}
  		wpa_printf(MSG_DEBUG, "   *AT_PADDING");
  		pos = eap_sim_msg_add(msg, attr_pad, 0, NULL, pad_len - 4);
  		if (pos == NULL) {
  			return -1;
  		}
  		os_memset(pos + 4, 0, pad_len - 4);
  		encr_len += pad_len;
  	}
  	wpa_printf(MSG_DEBUG, "   (AT_ENCR_DATA data len %lu)", (unsigned long)encr_len);
  	wpabuf_mhead_u8(msg->buf)[msg->encr + 1] = encr_len / 4 + 1;
  	return aes_128_cbc_encrypt(k_encr, wpabuf_head_u8(msg->buf) + msg->iv, wpabuf_mhead_u8(msg->buf) + msg->encr + 4, encr_len);
  }
  
  void eap_sim_report_notification(void *msg_ctx, int notification, int aka)
  {
  #ifndef CONFIG_NO_STDOUT_DEBUG
  	const char *type = aka ? "AKA" : "SIM";
  #endif							/* CONFIG_NO_STDOUT_DEBUG */
  
  	switch (notification) {
  	case EAP_SIM_GENERAL_FAILURE_AFTER_AUTH:
  		wpa_printf(MSG_WARNING, "EAP-%s: General failure " "notification (after authentication)", type);
  		break;
  	case EAP_SIM_TEMPORARILY_DENIED:
  		wpa_printf(MSG_WARNING, "EAP-%s: Failure notification: " "User has been temporarily denied access to the " "requested service", type);
  		break;
  	case EAP_SIM_NOT_SUBSCRIBED:
  		wpa_printf(MSG_WARNING, "EAP-%s: Failure notification: " "User has not subscribed to the requested service", type);
  		break;
  	case EAP_SIM_GENERAL_FAILURE_BEFORE_AUTH:
  		wpa_printf(MSG_WARNING, "EAP-%s: General failure " "notification (before authentication)", type);
  		break;
  	case EAP_SIM_SUCCESS:
  		wpa_printf(MSG_INFO, "EAP-%s: Successful authentication " "notification", type);
  		break;
  	default:
  		if (notification >= 32768) {
  			wpa_printf(MSG_INFO, "EAP-%s: Unrecognized " "non-failure notification %d", type, notification);
  		} else {
  			wpa_printf(MSG_WARNING, "EAP-%s: Unrecognized " "failure notification %d", type, notification);
  		}
  	}
  }
  