Added Milenage USIM emulator for EAP-AKA (can be used to simulate test
USIM card with a known private key; enable with CONFIG_USIM_SIMULATOR in .config and password="Ki:OPc:SQN" in network configuration).
This commit is contained in:
Jouni Malinen
Jouni Malinen
parent
988ab690ac
commit
2a24bb3199
7 changed files with 171 additions and 25 deletions
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@ -79,6 +79,7 @@ LIBS_p += -L$WINLOCAL/lib
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CONFIG_EAP_SIM=y
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CONFIG_EAP_AKA=y
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CONFIG_USIM_SIMULATOR=y
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CONFIG_EAP_LEAP=y
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CONFIG_EAP_FAST=y
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CONFIG_EAP_TLS=y
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@ -20,6 +20,10 @@
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#include "eap_common/eap_sim_common.h"
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#include "sha1.h"
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#include "crypto.h"
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#include "eap_peer/eap_config.h"
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#ifdef CONFIG_USIM_SIMULATOR
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#include "hlr_auc_gw/milenage.h"
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#endif /* CONFIG_USIM_SIMULATOR */
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struct eap_aka_data {
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@ -116,12 +120,58 @@ static void eap_aka_deinit(struct eap_sm *sm, void *priv)
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static int eap_aka_umts_auth(struct eap_sm *sm, struct eap_aka_data *data)
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{
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struct eap_peer_config *conf;
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wpa_printf(MSG_DEBUG, "EAP-AKA: UMTS authentication algorithm");
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#ifdef PCSC_FUNCS
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conf = eap_get_config(sm);
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if (conf == NULL)
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return -1;
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if (conf->pcsc) {
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return scard_umts_auth(sm->scard_ctx, data->rand,
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data->autn, data->res, &data->res_len,
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data->ik, data->ck, data->auts);
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#else /* PCSC_FUNCS */
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}
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#ifdef CONFIG_USIM_SIMULATOR
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if (conf->password) {
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u8 opc[16], k[16], sqn[6];
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const char *pos;
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wpa_printf(MSG_DEBUG, "EAP-AKA: Use internal Milenage "
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"implementation for UMTS authentication");
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if (conf->password_len < 78) {
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wpa_printf(MSG_DEBUG, "EAP-AKA: invalid Milenage "
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"password");
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return -1;
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}
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pos = (const char *) conf->password;
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if (hexstr2bin(pos, k, 16))
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return -1;
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pos += 32;
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if (*pos != ':')
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return -1;
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pos++;
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if (hexstr2bin(pos, opc, 16))
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return -1;
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pos += 32;
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if (*pos != ':')
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return -1;
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pos++;
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if (hexstr2bin(pos, sqn, 6))
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return -1;
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return milenage_check(opc, k, sqn, data->rand, data->autn,
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data->ik, data->ck,
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data->res, &data->res_len, data->auts);
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}
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#endif /* CONFIG_USIM_SIMULATOR */
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#ifdef CONFIG_USIM_HARDCODED
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wpa_printf(MSG_DEBUG, "EAP-AKA: Use hardcoded Kc and SRES values for "
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"testing");
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/* These hardcoded Kc and SRES values are used for testing.
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* Could consider making them configurable. */
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os_memset(data->res, '2', EAP_AKA_RES_MAX_LEN);
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@ -148,7 +198,14 @@ static int eap_aka_umts_auth(struct eap_sm *sm, struct eap_aka_data *data)
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}
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#endif
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return 0;
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#endif /* PCSC_FUNCS */
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#else /* CONFIG_USIM_HARDCODED */
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wpa_printf(MSG_DEBUG, "EAP-AKA: No UMTS authentication algorith "
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"enabled");
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return -1;
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#endif /* CONFIG_USIM_HARDCODED */
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}
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@ -52,9 +52,9 @@ static int milenage_f1(const u8 *opc, const u8 *k, const u8 *_rand,
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return -1;
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/* tmp2 = IN1 = SQN || AMF || SQN || AMF */
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memcpy(tmp2, sqn, 6);
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memcpy(tmp2 + 6, amf, 2);
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memcpy(tmp2 + 8, tmp2, 8);
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os_memcpy(tmp2, sqn, 6);
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os_memcpy(tmp2 + 6, amf, 2);
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os_memcpy(tmp2 + 8, tmp2, 8);
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/* OUT1 = E_K(TEMP XOR rot(IN1 XOR OP_C, r1) XOR c1) XOR OP_C */
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@ -72,9 +72,9 @@ static int milenage_f1(const u8 *opc, const u8 *k, const u8 *_rand,
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for (i = 0; i < 16; i++)
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tmp1[i] ^= opc[i];
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if (mac_a)
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memcpy(mac_a, tmp1, 8); /* f1 */
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os_memcpy(mac_a, tmp1, 8); /* f1 */
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if (mac_s)
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memcpy(mac_s, tmp1 + 8, 8); /* f1* */
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os_memcpy(mac_s, tmp1 + 8, 8); /* f1* */
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return 0;
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}
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@ -119,9 +119,9 @@ static int milenage_f2345(const u8 *opc, const u8 *k, const u8 *_rand,
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for (i = 0; i < 16; i++)
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tmp3[i] ^= opc[i];
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if (res)
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memcpy(res, tmp3 + 8, 8); /* f2 */
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os_memcpy(res, tmp3 + 8, 8); /* f2 */
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if (ak)
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memcpy(ak, tmp3, 6); /* f5 */
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os_memcpy(ak, tmp3, 6); /* f5 */
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/* f3 */
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if (ck) {
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@ -181,7 +181,7 @@ void milenage_generate(const u8 *opc, const u8 *amf, const u8 *k,
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u8 *ck, u8 *res, size_t *res_len)
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{
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int i;
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u8 mac_a[16], ak[6];
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u8 mac_a[8], ak[6];
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if (*res_len < 8) {
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*res_len = 0;
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@ -197,8 +197,8 @@ void milenage_generate(const u8 *opc, const u8 *amf, const u8 *k,
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/* AUTN = (SQN ^ AK) || AMF || MAC */
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for (i = 0; i < 6; i++)
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autn[i] = sqn[i] ^ ak[i];
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memcpy(autn + 6, amf, 2);
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memcpy(autn + 8, mac_a, 8);
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os_memcpy(autn + 6, amf, 2);
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os_memcpy(autn + 8, mac_a, 8);
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}
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@ -250,7 +250,7 @@ int gsm_milenage(const u8 *opc, const u8 *k, const u8 *_rand, u8 *sres, u8 *kc)
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kc[i] = ck[i] ^ ck[i + 8] ^ ik[i] ^ ik[i + 8];
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#ifdef GSM_MILENAGE_ALT_SRES
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memcpy(sres, res, 4);
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os_memcpy(sres, res, 4);
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#else /* GSM_MILENAGE_ALT_SRES */
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for (i = 0; i < 4; i++)
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sres[i] = res[i] ^ res[i + 4];
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@ -259,6 +259,76 @@ int gsm_milenage(const u8 *opc, const u8 *k, const u8 *_rand, u8 *sres, u8 *kc)
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}
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/**
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* milenage_generate - Generate AKA AUTN,IK,CK,RES
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* @opc: OPc = 128-bit operator variant algorithm configuration field (encr.)
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* @k: K = 128-bit subscriber key
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* @sqn: SQN = 48-bit sequence number
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* @_rand: RAND = 128-bit random challenge
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* @autn: AUTN = 128-bit authentication token
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* @ik: Buffer for IK = 128-bit integrity key (f4), or %NULL
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* @ck: Buffer for CK = 128-bit confidentiality key (f3), or %NULL
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* @res: Buffer for RES = 64-bit signed response (f2), or %NULL
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* @res_len: Variable that will be set to RES length
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* @auts: 112-bit buffer for AUTS
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* Returns: 0 on success, -1 on failure, or -2 on synchronization failure
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*/
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int milenage_check(const u8 *opc, const u8 *k, const u8 *sqn, const u8 *_rand,
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const u8 *autn, u8 *ik, u8 *ck, u8 *res, size_t *res_len,
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u8 *auts)
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{
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int i;
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u8 mac_a[8], ak[6], rx_sqn[6];
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const u8 *amf;
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wpa_hexdump(MSG_DEBUG, "Milenage: AUTN", autn, 16);
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wpa_hexdump(MSG_DEBUG, "Milenage: RAND", _rand, 16);
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if (milenage_f2345(opc, k, _rand, res, ck, ik, ak, NULL))
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return -1;
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*res_len = 8;
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wpa_hexdump_key(MSG_DEBUG, "Milenage: RES", res, *res_len);
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wpa_hexdump_key(MSG_DEBUG, "Milenage: CK", ck, 6);
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wpa_hexdump_key(MSG_DEBUG, "Milenage: IK", ik, 6);
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wpa_hexdump_key(MSG_DEBUG, "Milenage: AK", ak, 6);
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/* AUTN = (SQN ^ AK) || AMF || MAC */
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for (i = 0; i < 6; i++)
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rx_sqn[i] = autn[i] ^ ak[i];
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wpa_hexdump(MSG_DEBUG, "Milenage: SQN", rx_sqn, 6);
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if (os_memcmp(rx_sqn, sqn, 6) <= 0) {
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u8 auts_amf[2] = { 0x00, 0x00 }; /* TS 33.102 v7.0.0, 6.3.3 */
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if (milenage_f2345(opc, k, _rand, NULL, NULL, NULL, NULL, ak))
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return -1;
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wpa_hexdump_key(MSG_DEBUG, "Milenage: AK*", ak, 6);
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for (i = 0; i < 6; i++)
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auts[i] = sqn[i] ^ ak[i];
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if (milenage_f1(opc, k, _rand, sqn, auts_amf, NULL, auts + 6))
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return -1;
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wpa_hexdump(MSG_DEBUG, "Milenage: AUTS", auts, 14);
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return -2;
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}
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amf = autn + 6;
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wpa_hexdump(MSG_DEBUG, "Milenage: AMF", amf, 2);
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if (milenage_f1(opc, k, _rand, rx_sqn, amf, mac_a, NULL))
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return -1;
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wpa_hexdump(MSG_DEBUG, "Milenage: MAC_A", mac_a, 8);
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if (os_memcmp(mac_a, autn + 8, 8) != 0) {
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wpa_printf(MSG_DEBUG, "Milenage: MAC mismatch");
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wpa_hexdump(MSG_DEBUG, "Milenage: Received MAC_A",
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autn + 8, 8);
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return -1;
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}
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return 0;
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}
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#ifdef TEST_MAIN_MILENAGE
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extern int wpa_debug_level;
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@ -1006,17 +1076,18 @@ int main(int argc, char *argv[])
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}
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printf("milenage_auts test:\n");
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memcpy(auts, "\x4f\x20\x39\x39\x2d\xdd", 6);
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memcpy(auts + 6, "\x4b\xb4\x31\x6e\xd4\xa1\x46\x88", 8);
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os_memcpy(auts, "\x4f\x20\x39\x39\x2d\xdd", 6);
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os_memcpy(auts + 6, "\x4b\xb4\x31\x6e\xd4\xa1\x46\x88", 8);
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res = milenage_auts(t->opc, t->k, t->rand, auts, buf);
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printf("AUTS for test set %d: %d / SQN=%02x%02x%02x%02x%02x%02x\n",
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i, res, buf[0], buf[1], buf[2], buf[3], buf[4], buf[5]);
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if (res)
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ret++;
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memset(_rand, 0xaa, sizeof(_rand));
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memcpy(auts,
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"\x43\x68\x1a\xd3\xda\xf0\x06\xbc\xde\x40\x5a\x20\x72\x67", 14);
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os_memset(_rand, 0xaa, sizeof(_rand));
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os_memcpy(auts,
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"\x43\x68\x1a\xd3\xda\xf0\x06\xbc\xde\x40\x5a\x20\x72\x67",
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14);
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res = milenage_auts(t->opc, t->k, _rand, auts, buf);
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printf("AUTS from a test USIM: %d / SQN=%02x%02x%02x%02x%02x%02x\n",
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res, buf[0], buf[1], buf[2], buf[3], buf[4], buf[5]);
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@ -1024,8 +1095,8 @@ int main(int argc, char *argv[])
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ret++;
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printf("milenage_generate test:\n");
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memcpy(sqn, "\x00\x00\x00\x00\x40\x44", 6);
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memcpy(_rand, "\x12\x69\xb8\x23\x41\x39\x35\x66\xfb\x99\x41\xe9\x84"
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os_memcpy(sqn, "\x00\x00\x00\x00\x40\x44", 6);
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os_memcpy(_rand, "\x12\x69\xb8\x23\x41\x39\x35\x66\xfb\x99\x41\xe9\x84"
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"\x4f\xe6\x2f", 16);
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res_len = 8;
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milenage_generate(t->opc, t->amf, t->k, sqn, _rand, buf, buf2, buf3,
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@ -22,5 +22,8 @@ int milenage_auts(const u8 *opc, const u8 *k, const u8 *_rand, const u8 *auts,
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u8 *sqn);
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int gsm_milenage(const u8 *opc, const u8 *k, const u8 *_rand, u8 *sres,
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u8 *kc);
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int milenage_check(const u8 *opc, const u8 *k, const u8 *sqn, const u8 *_rand,
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const u8 *autn, u8 *ik, u8 *ck, u8 *res, size_t *res_len,
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u8 *auts);
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#endif /* MILENAGE_H */
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@ -1,5 +1,11 @@
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ChangeLog for wpa_supplicant
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????-??-?? - v0.6.6
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* added Milenage USIM emulator for EAP-AKA (can be used to simulate
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test USIM card with a known private key; enable with
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CONFIG_USIM_SIMULATOR in .config and password="Ki:OPc:SQN" in
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network configuration)
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2008-11-01 - v0.6.5
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* added support for SHA-256 as X.509 certificate digest when using the
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internal X.509/TLSv1 implementation
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@ -578,6 +578,11 @@ LIBS += -lpcsclite -lpthread
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endif
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endif
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ifdef CONFIG_USIM_SIMULATOR
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CFLAGS += -DCONFIG_USIM_SIMULATOR
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OBJS += ../src/hlr_auc_gw/milenage.o
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endif
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ifndef CONFIG_TLS
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CONFIG_TLS=openssl
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endif
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@ -153,6 +153,9 @@ CONFIG_EAP_LEAP=y
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# EAP-AKA (enable CONFIG_PCSC, if EAP-AKA is used)
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#CONFIG_EAP_AKA=y
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# Enable USIM simulator (Milenage) for EAP-AKA
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#CONFIG_USIM_SIMULATOR=y
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# EAP-SAKE
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#CONFIG_EAP_SAKE=y
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