/*
* WPA Supplicant / PC/SC smartcard interface for USIM, GSM SIM
* Copyright (c) 2004-2007, Jouni Malinen <j@w1.fi>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* Alternatively, this software may be distributed under the terms of BSD
* license.
*
* See README and COPYING for more details.
*
* This file implements wrapper functions for accessing GSM SIM and 3GPP USIM
* cards through PC/SC smartcard library. These functions are used to implement
* authentication routines for EAP-SIM and EAP-AKA.
*/
#include "includes.h"
#include <winscard.h>
#include "common.h"
#include "pcsc_funcs.h"
/* See ETSI GSM 11.11 and ETSI TS 102 221 for details.
* SIM commands:
* Command APDU: CLA INS P1 P2 P3 Data
* CLA (class of instruction): A0 for GSM, 00 for USIM
* INS (instruction)
* P1 P2 P3 (parameters, P3 = length of Data)
* Response APDU: Data SW1 SW2
* SW1 SW2 (Status words)
* Commands (INS P1 P2 P3):
* SELECT: A4 00 00 02 <file_id, 2 bytes>
* GET RESPONSE: C0 00 00 <len>
* RUN GSM ALG: 88 00 00 00 <RAND len = 10>
* RUN UMTS ALG: 88 00 81 <len=0x22> data: 0x10 | RAND | 0x10 | AUTN
* P1 = ID of alg in card
* P2 = ID of secret key
* READ BINARY: B0 <offset high> <offset low> <len>
* READ RECORD: B2 <record number> <mode> <len>
* P2 (mode) = '02' (next record), '03' (previous record),
* '04' (absolute mode)
* VERIFY CHV: 20 00 <CHV number> 08
* CHANGE CHV: 24 00 <CHV number> 10
* DISABLE CHV: 26 00 01 08
* ENABLE CHV: 28 00 01 08
* UNBLOCK CHV: 2C 00 <00=CHV1, 02=CHV2> 10
* SLEEP: FA 00 00 00
*/
/* GSM SIM commands */
#define SIM_CMD_SELECT 0xa0, 0xa4, 0x00, 0x00, 0x02
#define SIM_CMD_RUN_GSM_ALG 0xa0, 0x88, 0x00, 0x00, 0x10
#define SIM_CMD_GET_RESPONSE 0xa0, 0xc0, 0x00, 0x00
#define SIM_CMD_READ_BIN 0xa0, 0xb0, 0x00, 0x00
#define SIM_CMD_READ_RECORD 0xa0, 0xb2, 0x00, 0x00
#define SIM_CMD_VERIFY_CHV1 0xa0, 0x20, 0x00, 0x01, 0x08
/* USIM commands */
#define USIM_CLA 0x00
#define USIM_CMD_RUN_UMTS_ALG 0x00, 0x88, 0x00, 0x81, 0x22
#define USIM_CMD_GET_RESPONSE 0x00, 0xc0, 0x00, 0x00
#define SIM_RECORD_MODE_ABSOLUTE 0x04
#define USIM_FSP_TEMPL_TAG 0x62
#define USIM_TLV_FILE_DESC 0x82
#define USIM_TLV_FILE_ID 0x83
#define USIM_TLV_DF_NAME 0x84
#define USIM_TLV_PROPR_INFO 0xA5
#define USIM_TLV_LIFE_CYCLE_STATUS 0x8A
#define USIM_TLV_FILE_SIZE 0x80
#define USIM_TLV_TOTAL_FILE_SIZE 0x81
#define USIM_TLV_PIN_STATUS_TEMPLATE 0xC6
#define USIM_TLV_SHORT_FILE_ID 0x88
#define USIM_PS_DO_TAG 0x90
#define AKA_RAND_LEN 16
#define AKA_AUTN_LEN 16
#define AKA_AUTS_LEN 14
#define RES_MAX_LEN 16
#define IK_LEN 16
#define CK_LEN 16
typedef enum { SCARD_GSM_SIM, SCARD_USIM } sim_types;
struct scard_data {
SCARDCONTEXT ctx;
SCARDHANDLE card;
DWORD protocol;
sim_types sim_type;
int pin1_required;
};
#ifdef __MINGW32_VERSION
/* MinGW does not yet support WinScard, so load the needed functions
* dynamically from winscard.dll for now. */
static HINSTANCE dll = NULL; /* winscard.dll */
static const SCARD_IO_REQUEST *dll_g_rgSCardT0Pci, *dll_g_rgSCardT1Pci;
#undef SCARD_PCI_T0
#define SCARD_PCI_T0 (dll_g_rgSCardT0Pci)
#undef SCARD_PCI_T1
#define SCARD_PCI_T1 (dll_g_rgSCardT1Pci)
static WINSCARDAPI LONG WINAPI
(*dll_SCardEstablishContext)(IN DWORD dwScope,
IN LPCVOID pvReserved1,
IN LPCVOID pvReserved2,
OUT LPSCARDCONTEXT phContext);
#define SCardEstablishContext dll_SCardEstablishContext
static long (*dll_SCardReleaseContext)(long hContext);
#define SCardReleaseContext dll_SCardReleaseContext
static WINSCARDAPI LONG WINAPI
(*dll_SCardListReadersA)(IN SCARDCONTEXT hContext,
IN LPCSTR mszGroups,
OUT LPSTR mszReaders,
IN OUT LPDWORD pcchReaders);
#undef SCardListReaders
#define SCardListReaders dll_SCardListReadersA
static WINSCARDAPI LONG WINAPI
(*dll_SCardConnectA)(IN SCARDCONTEXT hContext,
IN LPCSTR szReader,
IN DWORD dwShareMode,
IN DWORD dwPreferredProtocols,
OUT LPSCARDHANDLE phCard,
OUT LPDWORD pdwActiveProtocol);
#undef SCardConnect
#define SCardConnect dll_SCardConnectA
static WINSCARDAPI LONG WINAPI
(*dll_SCardDisconnect)(IN SCARDHANDLE hCard,
IN DWORD dwDisposition);
#define SCardDisconnect dll_SCardDisconnect
static WINSCARDAPI LONG WINAPI
(*dll_SCardTransmit)(IN SCARDHANDLE hCard,
IN LPCSCARD_IO_REQUEST pioSendPci,
IN LPCBYTE pbSendBuffer,
IN DWORD cbSendLength,
IN OUT LPSCARD_IO_REQUEST pioRecvPci,
OUT LPBYTE pbRecvBuffer,
IN OUT LPDWORD pcbRecvLength);
#define SCardTransmit dll_SCardTransmit
static WINSCARDAPI LONG WINAPI
(*dll_SCardBeginTransaction)(IN SCARDHANDLE hCard);
#define SCardBeginTransaction dll_SCardBeginTransaction
static WINSCARDAPI LONG WINAPI
(*dll_SCardEndTransaction)(IN SCARDHANDLE hCard, IN DWORD dwDisposition);
#define SCardEndTransaction dll_SCardEndTransaction
static int mingw_load_symbols(void)
{
char *sym;
if (dll)
return 0;
dll = LoadLibrary("winscard");
if (dll == NULL) {
wpa_printf(MSG_DEBUG, "WinSCard: Could not load winscard.dll "
"library");
return -1;
}
#define LOADSYM(s) \
sym = #s; \
dll_ ## s = (void *) GetProcAddress(dll, sym); \
if (dll_ ## s == NULL) \
goto fail;
LOADSYM(SCardEstablishContext);
LOADSYM(SCardReleaseContext);
LOADSYM(SCardListReadersA);
LOADSYM(SCardConnectA);
LOADSYM(SCardDisconnect);
LOADSYM(SCardTransmit);
LOADSYM(SCardBeginTransaction);
LOADSYM(SCardEndTransaction);
LOADSYM(g_rgSCardT0Pci);
LOADSYM(g_rgSCardT1Pci);
#undef LOADSYM
return 0;
fail:
wpa_printf(MSG_DEBUG, "WinSCard: Could not get address for %s from "
"winscard.dll", sym);
FreeLibrary(dll);
dll = NULL;
return -1;
}
static void mingw_unload_symbols(void)
{
if (dll == NULL)
return;
FreeLibrary(dll);
dll = NULL;
}
#else /* __MINGW32_VERSION */
#define mingw_load_symbols() 0
#define mingw_unload_symbols() do { } while (0)
#endif /* __MINGW32_VERSION */
static int _scard_select_file(struct scard_data *scard, unsigned short file_id,
unsigned char *buf, size_t *buf_len,
sim_types sim_type, unsigned char *aid,
size_t aidlen);
static int scard_select_file(struct scard_data *scard, unsigned short file_id,
unsigned char *buf, size_t *buf_len);
static int scard_verify_pin(struct scard_data *scard, const char *pin);
static int scard_get_record_len(struct scard_data *scard,
unsigned char recnum, unsigned char mode);
static int scard_read_record(struct scard_data *scard,
unsigned char *data, size_t len,
unsigned char recnum, unsigned char mode);
static int scard_parse_fsp_templ(unsigned char *buf, size_t buf_len,
int *ps_do, int *file_len)
{
unsigned char *pos, *end;
if (ps_do)
*ps_do = -1;
if (file_len)
*file_len = -1;
pos = buf;
end = pos + buf_len;
if (*pos != USIM_FSP_TEMPL_TAG) {
wpa_printf(MSG_DEBUG, "SCARD: file header did not "
"start with FSP template tag");
return -1;
}
pos++;
if (pos >= end)
return -1;
if ((pos + pos[0]) < end)
end = pos + 1 + pos[0];
pos++;
wpa_hexdump(MSG_DEBUG, "SCARD: file header FSP template",
pos, end - pos);
while (pos + 1 < end) {
wpa_printf(MSG_MSGDUMP, "SCARD: file header TLV "
"0x%02x len=%d", pos[0], pos[1]);
if (pos + 2 + pos[1] > end)
break;
if (pos[0] == USIM_TLV_FILE_SIZE &&
(pos[1] == 1 || pos[1] == 2) && file_len) {
if (pos[1] == 1)
*file_len = (int) pos[2];
else
*file_len = ((int) pos[2] << 8) |
(int) pos[3];
wpa_printf(MSG_DEBUG, "SCARD: file_size=%d",
*file_len);
}
if (pos[0] == USIM_TLV_PIN_STATUS_TEMPLATE &&
pos[1] >= 2 && pos[2] == USIM_PS_DO_TAG &&
pos[3] >= 1 && ps_do) {
wpa_printf(MSG_DEBUG, "SCARD: PS_DO=0x%02x",
pos[4]);
*ps_do = (int) pos[4];
}
pos += 2 + pos[1];
if (pos == end)
return 0;
}
return -1;
}
static int scard_pin_needed(struct scard_data *scard,
unsigned char *hdr, size_t hlen)
{
if (scard->sim_type == SCARD_GSM_SIM) {
if (hlen > SCARD_CHV1_OFFSET &&
!(hdr[SCARD_CHV1_OFFSET] & SCARD_CHV1_FLAG))
return 1;
return 0;
}
if (scard->sim_type == SCARD_USIM) {
int ps_do;
if (scard_parse_fsp_templ(hdr, hlen, &ps_do, NULL))
return -1;
/* TODO: there could be more than one PS_DO entry because of
* multiple PINs in key reference.. */
if (ps_do > 0 && (ps_do & 0x80))
return 1;
return 0;
}
return -1;
}
static int scard_get_aid(struct scard_data *scard, unsigned char *aid,
size_t maxlen)
{
int rlen, rec;
struct efdir {
unsigned char appl_template_tag; /* 0x61 */
unsigned char appl_template_len;
unsigned char appl_id_tag; /* 0x4f */
unsigned char aid_len;
unsigned char rid[5];
unsigned char appl_code[2]; /* 0x1002 for 3G USIM */
} *efdir;
unsigned char buf[100];
size_t blen;
efdir = (struct efdir *) buf;
blen = sizeof(buf);
if (scard_select_file(scard, SCARD_FILE_EF_DIR, buf, &blen)) {
wpa_printf(MSG_DEBUG, "SCARD: Failed to read EF_DIR");
return -1;
}
wpa_hexdump(MSG_DEBUG, "SCARD: EF_DIR select", buf, blen);
for (rec = 1; rec < 10; rec++) {
rlen = scard_get_record_len(scard, rec,
SIM_RECORD_MODE_ABSOLUTE);
if (rlen < 0) {
wpa_printf(MSG_DEBUG, "SCARD: Failed to get EF_DIR "
"record length");
return -1;
}
blen = sizeof(buf);
if (rlen > (int) blen) {
wpa_printf(MSG_DEBUG, "SCARD: Too long EF_DIR record");
return -1;
}
if (scard_read_record(scard, buf, rlen, rec,
SIM_RECORD_MODE_ABSOLUTE) < 0) {
wpa_printf(MSG_DEBUG, "SCARD: Failed to read "
"EF_DIR record %d", rec);
return -1;
}
wpa_hexdump(MSG_DEBUG, "SCARD: EF_DIR record", buf, rlen);
if (efdir->appl_template_tag != 0x61) {
wpa_printf(MSG_DEBUG, "SCARD: Unexpected application "
"template tag 0x%x",
efdir->appl_template_tag);
continue;
}
if (efdir->appl_template_len > rlen - 2) {
wpa_printf(MSG_DEBUG, "SCARD: Too long application "
"template (len=%d rlen=%d)",
efdir->appl_template_len, rlen);
continue;
}
if (efdir->appl_id_tag != 0x4f) {
wpa_printf(MSG_DEBUG, "SCARD: Unexpected application "
"identifier tag 0x%x", efdir->appl_id_tag);
continue;
}
if (efdir->aid_len < 1 || efdir->aid_len > 16) {
wpa_printf(MSG_DEBUG, "SCARD: Invalid AID length %d",
efdir->aid_len);
continue;
}
wpa_hexdump(MSG_DEBUG, "SCARD: AID from EF_DIR record",
efdir->rid, efdir->aid_len);
if (efdir->appl_code[0] == 0x10 &&
efdir->appl_code[1] == 0x02) {
wpa_printf(MSG_DEBUG, "SCARD: 3G USIM app found from "
"EF_DIR record %d", rec);
break;
}
}
if (rec >= 10) {
wpa_printf(MSG_DEBUG, "SCARD: 3G USIM app not found "
"from EF_DIR records");
return -1;
}
if (efdir->aid_len > maxlen) {
wpa_printf(MSG_DEBUG, "SCARD: Too long AID");
return -1;
}
os_memcpy(aid, efdir->rid, efdir->aid_len);
return efdir->aid_len;
}
/**
* scard_init - Initialize SIM/USIM connection using PC/SC
* @sim_type: Allowed SIM types (SIM, USIM, or both)
* Returns: Pointer to private data structure, or %NULL on failure
*
* This function is used to initialize SIM/USIM connection. PC/SC is used to
* open connection to the SIM/USIM card and the card is verified to support the
* selected sim_type. In addition, local flag is set if a PIN is needed to
* access some of the card functions. Once the connection is not needed
* anymore, scard_deinit() can be used to close it.
*/
struct scard_data * scard_init(scard_sim_type sim_type)
{
long ret;
unsigned long len;
struct scard_data *scard;
#ifdef CONFIG_NATIVE_WINDOWS
TCHAR *readers = NULL;
#else /* CONFIG_NATIVE_WINDOWS */
char *readers = NULL;
#endif /* CONFIG_NATIVE_WINDOWS */
unsigned char buf[100];
size_t blen;
int transaction = 0;
int pin_needed;
wpa_printf(MSG_DEBUG, "SCARD: initializing smart card interface");
if (mingw_load_symbols())
return NULL;
scard = os_zalloc(sizeof(*scard));
if (scard == NULL)
return NULL;
ret = SCardEstablishContext(SCARD_SCOPE_SYSTEM, NULL, NULL,
&scard->ctx);
if (ret != SCARD_S_SUCCESS) {
wpa_printf(MSG_DEBUG, "SCARD: Could not establish smart card "
"context (err=%ld)", ret);
goto failed;
}
ret = SCardListReaders(scard->ctx, NULL, NULL, &len);
if (ret != SCARD_S_SUCCESS) {
wpa_printf(MSG_DEBUG, "SCARD: SCardListReaders failed "
"(err=%ld)", ret);
goto failed;
}
#ifdef UNICODE
len *= 2;
#endif /* UNICODE */
readers = os_malloc(len);
if (readers == NULL) {
wpa_printf(MSG_INFO, "SCARD: malloc failed\n");
goto failed;
}
ret = SCardListReaders(scard->ctx, NULL, readers, &len);
if (ret != SCARD_S_SUCCESS) {
wpa_printf(MSG_DEBUG, "SCARD: SCardListReaders failed(2) "
"(err=%ld)", ret);
goto failed;
}
if (len < 3) {
wpa_printf(MSG_WARNING, "SCARD: No smart card readers "
"available.");
goto failed;
}
/* readers is a list of available reader. Last entry is terminated with
* double NUL.
* TODO: add support for selecting the reader; now just use the first
* one.. */
#ifdef UNICODE
wpa_printf(MSG_DEBUG, "SCARD: Selected reader='%S'", readers);
#else /* UNICODE */
wpa_printf(MSG_DEBUG, "SCARD: Selected reader='%s'", readers);
#endif /* UNICODE */
ret = SCardConnect(scard->ctx, readers, SCARD_SHARE_SHARED,
SCARD_PROTOCOL_T0, &scard->card, &scard->protocol);
if (ret != SCARD_S_SUCCESS) {
if (ret == (long) SCARD_E_NO_SMARTCARD)
wpa_printf(MSG_INFO, "No smart card inserted.");
else
wpa_printf(MSG_WARNING, "SCardConnect err=%lx", ret);
goto failed;
}
os_free(readers);
readers = NULL;
wpa_printf(MSG_DEBUG, "SCARD: card=0x%x active_protocol=%lu (%s)",
(unsigned int) scard->card, scard->protocol,
scard->protocol == SCARD_PROTOCOL_T0 ? "T0" : "T1");
ret = SCardBeginTransaction(scard->card);
if (ret != SCARD_S_SUCCESS) {
wpa_printf(MSG_DEBUG, "SCARD: Could not begin transaction: "
"0x%x", (unsigned int) ret);
goto failed;
}
transaction = 1;
blen = sizeof(buf);
scard->sim_type = SCARD_GSM_SIM;
if (sim_type == SCARD_USIM_ONLY || sim_type == SCARD_TRY_BOTH) {
wpa_printf(MSG_DEBUG, "SCARD: verifying USIM support");
if (_scard_select_file(scard, SCARD_FILE_MF, buf, &blen,
SCARD_USIM, NULL, 0)) {
wpa_printf(MSG_DEBUG, "SCARD: USIM is not supported");
if (sim_type == SCARD_USIM_ONLY)
goto failed;
wpa_printf(MSG_DEBUG, "SCARD: Trying to use GSM SIM");
scard->sim_type = SCARD_GSM_SIM;
} else {
wpa_printf(MSG_DEBUG, "SCARD: USIM is supported");
scard->sim_type = SCARD_USIM;
}
}
if (scard->sim_type == SCARD_GSM_SIM) {
blen = sizeof(buf);
if (scard_select_file(scard, SCARD_FILE_MF, buf, &blen)) {
wpa_printf(MSG_DEBUG, "SCARD: Failed to read MF");
goto failed;
}
blen = sizeof(buf);
if (scard_select_file(scard, SCARD_FILE_GSM_DF, buf, &blen)) {
wpa_printf(MSG_DEBUG, "SCARD: Failed to read GSM DF");
goto failed;
}
} else {
unsigned char aid[32];
int aid_len;
aid_len = scard_get_aid(scard, aid, sizeof(aid));
if (aid_len < 0) {
wpa_printf(MSG_DEBUG, "SCARD: Failed to find AID for "
"3G USIM app - try to use standard 3G RID");
os_memcpy(aid, "\xa0\x00\x00\x00\x87", 5);
aid_len = 5;
}
wpa_hexdump(MSG_DEBUG, "SCARD: 3G USIM AID", aid, aid_len);
/* Select based on AID = 3G RID from EF_DIR. This is usually
* starting with A0 00 00 00 87. */
blen = sizeof(buf);
if (_scard_select_file(scard, 0, buf, &blen, scard->sim_type,
aid, aid_len)) {
wpa_printf(MSG_INFO, "SCARD: Failed to read 3G USIM "
"app");
wpa_hexdump(MSG_INFO, "SCARD: 3G USIM AID",
aid, aid_len);
goto failed;
}
}
/* Verify whether CHV1 (PIN1) is needed to access the card. */
pin_needed = scard_pin_needed(scard, buf, blen);
if (pin_needed < 0) {
wpa_printf(MSG_DEBUG, "SCARD: Failed to determine whether PIN "
"is needed");
goto failed;
}
if (pin_needed) {
scard->pin1_required = 1;
wpa_printf(MSG_DEBUG, "PIN1 needed for SIM access");
}
ret = SCardEndTransaction(scard->card, SCARD_LEAVE_CARD);
if (ret != SCARD_S_SUCCESS) {
wpa_printf(MSG_DEBUG, "SCARD: Could not end transaction: "
"0x%x", (unsigned int) ret);
}
return scard;
failed:
if (transaction)
SCardEndTransaction(scard->card, SCARD_LEAVE_CARD);
os_free(readers);
scard_deinit(scard);
return NULL;
}
/**
* scard_set_pin - Set PIN (CHV1/PIN1) code for accessing SIM/USIM commands
* @scard: Pointer to private data from scard_init()
* @pin: PIN code as an ASCII string (e.g., "1234")
* Returns: 0 on success, -1 on failure
*/
int scard_set_pin(struct scard_data *scard, const char *pin)
{
if (scard == NULL)
return -1;
/* Verify whether CHV1 (PIN1) is needed to access the card. */
if (scard->pin1_required) {
if (pin == NULL) {
wpa_printf(MSG_DEBUG, "No PIN configured for SIM "
"access");
return -1;
}
if (scard_verify_pin(scard, pin)) {
wpa_printf(MSG_INFO, "PIN verification failed for "
"SIM access");
return -1;
}
}
return 0;
}
/**
* scard_deinit - Deinitialize SIM/USIM connection
* @scard: Pointer to private data from scard_init()
*
* This function closes the SIM/USIM connect opened with scard_init().
*/
void scard_deinit(struct scard_data *scard)
{
long ret;
if (scard == NULL)
return;
wpa_printf(MSG_DEBUG, "SCARD: deinitializing smart card interface");
if (scard->card) {
ret = SCardDisconnect(scard->card, SCARD_UNPOWER_CARD);
if (ret != SCARD_S_SUCCESS) {
wpa_printf(MSG_DEBUG, "SCARD: Failed to disconnect "
"smart card (err=%ld)", ret);
}
}
if (scard->ctx) {
ret = SCardReleaseContext(scard->ctx);
if (ret != SCARD_S_SUCCESS) {
wpa_printf(MSG_DEBUG, "Failed to release smart card "
"context (err=%ld)", ret);
}
}
os_free(scard);
mingw_unload_symbols();
}
static long scard_transmit(struct scard_data *scard,
unsigned char *_send, size_t send_len,
unsigned char *_recv, size_t *recv_len)
{
long ret;
unsigned long rlen;
wpa_hexdump_key(MSG_DEBUG, "SCARD: scard_transmit: send",
_send, send_len);
rlen = *recv_len;
ret = SCardTransmit(scard->card,
scard->protocol == SCARD_PROTOCOL_T1 ?
SCARD_PCI_T1 : SCARD_PCI_T0,
_send, (unsigned long) send_len,
NULL, _recv, &rlen);
*recv_len = rlen;
if (ret == SCARD_S_SUCCESS) {
wpa_hexdump(MSG_DEBUG, "SCARD: scard_transmit: recv",
_recv, rlen);
} else {
wpa_printf(MSG_WARNING, "SCARD: SCardTransmit failed "
"(err=0x%lx)", ret);
}
return ret;
}
static int _scard_select_file(struct scard_data *scard, unsigned short file_id,
unsigned char *buf, size_t *buf_len,
sim_types sim_type, unsigned char *aid,
size_t aidlen)
{
long ret;
unsigned char resp[3];
unsigned char cmd[50] = { SIM_CMD_SELECT };
int cmdlen;
unsigned char get_resp[5] = { SIM_CMD_GET_RESPONSE };
size_t len, rlen;
if (sim_type == SCARD_USIM) {
cmd[0] = USIM_CLA;
cmd[3] = 0x04;
get_resp[0] = USIM_CLA;
}
wpa_printf(MSG_DEBUG, "SCARD: select file %04x", file_id);
if (aid) {
wpa_hexdump(MSG_DEBUG, "SCARD: select file by AID",
aid, aidlen);
if (5 + aidlen > sizeof(cmd))
return -1;
cmd[2] = 0x04; /* Select by AID */
cmd[4] = aidlen; /* len */
os_memcpy(cmd + 5, aid, aidlen);
cmdlen = 5 + aidlen;
} else {
cmd[5] = file_id >> 8;
cmd[6] = file_id & 0xff;
cmdlen = 7;
}
len = sizeof(resp);
ret = scard_transmit(scard, cmd, cmdlen, resp, &len);
if (ret != SCARD_S_SUCCESS) {
wpa_printf(MSG_WARNING, "SCARD: SCardTransmit failed "
"(err=0x%lx)", ret);
return -1;
}
if (len != 2) {
wpa_printf(MSG_WARNING, "SCARD: unexpected resp len "
"%d (expected 2)", (int) len);
return -1;
}
if (resp[0] == 0x98 && resp[1] == 0x04) {
/* Security status not satisfied (PIN_WLAN) */
wpa_printf(MSG_WARNING, "SCARD: Security status not satisfied "
"(PIN_WLAN)");
return -1;
}
if (resp[0] == 0x6e) {
wpa_printf(MSG_DEBUG, "SCARD: used CLA not supported");
return -1;
}
if (resp[0] != 0x6c && resp[0] != 0x9f && resp[0] != 0x61) {
wpa_printf(MSG_WARNING, "SCARD: unexpected response 0x%02x "
"(expected 0x61, 0x6c, or 0x9f)", resp[0]);
return -1;
}
/* Normal ending of command; resp[1] bytes available */
get_resp[4] = resp[1];
wpa_printf(MSG_DEBUG, "SCARD: trying to get response (%d bytes)",
resp[1]);
rlen = *buf_len;
ret = scard_transmit(scard, get_resp, sizeof(get_resp), buf, &rlen);
if (ret == SCARD_S_SUCCESS) {
*buf_len = resp[1] < rlen ? resp[1] : rlen;
return 0;
}
wpa_printf(MSG_WARNING, "SCARD: SCardTransmit err=0x%lx\n", ret);
return -1;
}
static int scard_select_file(struct scard_data *scard, unsigned short file_id,
unsigned char *buf, size_t *buf_len)
{
return _scard_select_file(scard, file_id, buf, buf_len,
scard->sim_type, NULL, 0);
}
static int scard_get_record_len(struct scard_data *scard, unsigned char recnum,
unsigned char mode)
{
unsigned char buf[255];
unsigned char cmd[5] = { SIM_CMD_READ_RECORD /* , len */ };
size_t blen;
long ret;
if (scard->sim_type == SCARD_USIM)
cmd[0] = USIM_CLA;
cmd[2] = recnum;
cmd[3] = mode;
cmd[4] = sizeof(buf);
blen = sizeof(buf);
ret = scard_transmit(scard, cmd, sizeof(cmd), buf, &blen);
if (ret != SCARD_S_SUCCESS) {
wpa_printf(MSG_DEBUG, "SCARD: failed to determine file "
"length for record %d", recnum);
return -1;
}
wpa_hexdump(MSG_DEBUG, "SCARD: file length determination response",
buf, blen);
if (blen < 2 || buf[0] != 0x6c) {
wpa_printf(MSG_DEBUG, "SCARD: unexpected response to file "
"length determination");
return -1;
}
return buf[1];
}
static int scard_read_record(struct scard_data *scard,
unsigned char *data, size_t len,
unsigned char recnum, unsigned char mode)
{
unsigned char cmd[5] = { SIM_CMD_READ_RECORD /* , len */ };
size_t blen = len + 3;
unsigned char *buf;
long ret;
if (scard->sim_type == SCARD_USIM)
cmd[0] = USIM_CLA;
cmd[2] = recnum;
cmd[3] = mode;
cmd[4] = len;
buf = os_malloc(blen);
if (buf == NULL)
return -1;
ret = scard_transmit(scard, cmd, sizeof(cmd), buf, &blen);
if (ret != SCARD_S_SUCCESS) {
os_free(buf);
return -2;
}
if (blen != len + 2) {
wpa_printf(MSG_DEBUG, "SCARD: record read returned unexpected "
"length %ld (expected %ld)",
(long) blen, (long) len + 2);
os_free(buf);
return -3;
}
if (buf[len] != 0x90 || buf[len + 1] != 0x00) {
wpa_printf(MSG_DEBUG, "SCARD: record read returned unexpected "
"status %02x %02x (expected 90 00)",
buf[len], buf[len + 1]);
os_free(buf);
return -4;
}
os_memcpy(data, buf, len);
os_free(buf);
return 0;
}
static int scard_read_file(struct scard_data *scard,
unsigned char *data, size_t len)
{
unsigned char cmd[5] = { SIM_CMD_READ_BIN /* , len */ };
size_t blen = len + 3;
unsigned char *buf;
long ret;
cmd[4] = len;
buf = os_malloc(blen);
if (buf == NULL)
return -1;
if (scard->sim_type == SCARD_USIM)
cmd[0] = USIM_CLA;
ret = scard_transmit(scard, cmd, sizeof(cmd), buf, &blen);
if (ret != SCARD_S_SUCCESS) {
os_free(buf);
return -2;
}
if (blen != len + 2) {
wpa_printf(MSG_DEBUG, "SCARD: file read returned unexpected "
"length %ld (expected %ld)",
(long) blen, (long) len + 2);
os_free(buf);
return -3;
}
if (buf[len] != 0x90 || buf[len + 1] != 0x00) {
wpa_printf(MSG_DEBUG, "SCARD: file read returned unexpected "
"status %02x %02x (expected 90 00)",
buf[len], buf[len + 1]);
os_free(buf);
return -4;
}
os_memcpy(data, buf, len);
os_free(buf);
return 0;
}
static int scard_verify_pin(struct scard_data *scard, const char *pin)
{
long ret;
unsigned char resp[3];
unsigned char cmd[5 + 8] = { SIM_CMD_VERIFY_CHV1 };
size_t len;
wpa_printf(MSG_DEBUG, "SCARD: verifying PIN");
if (pin == NULL || os_strlen(pin) > 8)
return -1;
if (scard->sim_type == SCARD_USIM)
cmd[0] = USIM_CLA;
os_memcpy(cmd + 5, pin, os_strlen(pin));
os_memset(cmd + 5 + os_strlen(pin), 0xff, 8 - os_strlen(pin));
len = sizeof(resp);
ret = scard_transmit(scard, cmd, sizeof(cmd), resp, &len);
if (ret != SCARD_S_SUCCESS)
return -2;
if (len != 2 || resp[0] != 0x90 || resp[1] != 0x00) {
wpa_printf(MSG_WARNING, "SCARD: PIN verification failed");
return -1;
}
wpa_printf(MSG_DEBUG, "SCARD: PIN verified successfully");
return 0;
}
/**
* scard_get_imsi - Read IMSI from SIM/USIM card
* @scard: Pointer to private data from scard_init()
* @imsi: Buffer for IMSI
* @len: Length of imsi buffer; set to IMSI length on success
* Returns: 0 on success, -1 if IMSI file cannot be selected, -2 if IMSI file
* selection returns invalid result code, -3 if parsing FSP template file fails
* (USIM only), -4 if IMSI does not fit in the provided imsi buffer (len is set
* to needed length), -5 if reading IMSI file fails.
*
* This function can be used to read IMSI from the SIM/USIM card. If the IMSI
* file is PIN protected, scard_set_pin() must have been used to set the
* correct PIN code before calling scard_get_imsi().
*/
int scard_get_imsi(struct scard_data *scard, char *imsi, size_t *len)
{
unsigned char buf[100];
size_t blen, imsilen, i;
char *pos;
wpa_printf(MSG_DEBUG, "SCARD: reading IMSI from (GSM) EF-IMSI");
blen = sizeof(buf);
if (scard_select_file(scard, SCARD_FILE_GSM_EF_IMSI, buf, &blen))
return -1;
if (blen < 4) {
wpa_printf(MSG_WARNING, "SCARD: too short (GSM) EF-IMSI "
"header (len=%ld)", (long) blen);
return -2;
}
if (scard->sim_type == SCARD_GSM_SIM) {
blen = (buf[2] << 8) | buf[3];
} else {
int file_size;
if (scard_parse_fsp_templ(buf, blen, NULL, &file_size))
return -3;
blen = file_size;
}
if (blen < 2 || blen > sizeof(buf)) {
wpa_printf(MSG_DEBUG, "SCARD: invalid IMSI file length=%ld",
(long) blen);
return -3;
}
imsilen = (blen - 2) * 2 + 1;
wpa_printf(MSG_DEBUG, "SCARD: IMSI file length=%ld imsilen=%ld",
(long) blen, (long) imsilen);
if (blen < 2 || imsilen > *len) {
*len = imsilen;
return -4;
}
if (scard_read_file(scard, buf, blen))
return -5;
pos = imsi;
*pos++ = '0' + (buf[1] >> 4 & 0x0f);
for (i = 2; i < blen; i++) {
unsigned char digit;
digit = buf[i] & 0x0f;
if (digit < 10)
*pos++ = '0' + digit;
else
imsilen--;
digit = buf[i] >> 4 & 0x0f;
if (digit < 10)
*pos++ = '0' + digit;
else
imsilen--;
}
*len = imsilen;
return 0;
}
/**
* scard_gsm_auth - Run GSM authentication command on SIM card
* @scard: Pointer to private data from scard_init()
* @_rand: 16-byte RAND value from HLR/AuC
* @sres: 4-byte buffer for SRES
* @kc: 8-byte buffer for Kc
* Returns: 0 on success, -1 if SIM/USIM connection has not been initialized,
* -2 if authentication command execution fails, -3 if unknown response code
* for authentication command is received, -4 if reading of response fails,
* -5 if if response data is of unexpected length
*
* This function performs GSM authentication using SIM/USIM card and the
* provided RAND value from HLR/AuC. If authentication command can be completed
* successfully, SRES and Kc values will be written into sres and kc buffers.
*/
int scard_gsm_auth(struct scard_data *scard, const unsigned char *_rand,
unsigned char *sres, unsigned char *kc)
{
unsigned char cmd[5 + 1 + 16] = { SIM_CMD_RUN_GSM_ALG };
int cmdlen;
unsigned char get_resp[5] = { SIM_CMD_GET_RESPONSE };
unsigned char resp[3], buf[12 + 3 + 2];
size_t len;
long ret;
if (scard == NULL)
return -1;
wpa_hexdump(MSG_DEBUG, "SCARD: GSM auth - RAND", _rand, 16);
if (scard->sim_type == SCARD_GSM_SIM) {
cmdlen = 5 + 16;
os_memcpy(cmd + 5, _rand, 16);
} else {
cmdlen = 5 + 1 + 16;
cmd[0] = USIM_CLA;
cmd[3] = 0x80;
cmd[4] = 17;
cmd[5] = 16;
os_memcpy(cmd + 6, _rand, 16);
}
len = sizeof(resp);
ret = scard_transmit(scard, cmd, cmdlen, resp, &len);
if (ret != SCARD_S_SUCCESS)
return -2;
if ((scard->sim_type == SCARD_GSM_SIM &&
(len != 2 || resp[0] != 0x9f || resp[1] != 0x0c)) ||
(scard->sim_type == SCARD_USIM &&
(len != 2 || resp[0] != 0x61 || resp[1] != 0x0e))) {
wpa_printf(MSG_WARNING, "SCARD: unexpected response for GSM "
"auth request (len=%ld resp=%02x %02x)",
(long) len, resp[0], resp[1]);
return -3;
}
get_resp[4] = resp[1];
len = sizeof(buf);
ret = scard_transmit(scard, get_resp, sizeof(get_resp), buf, &len);
if (ret != SCARD_S_SUCCESS)
return -4;
if (scard->sim_type == SCARD_GSM_SIM) {
if (len != 4 + 8 + 2) {
wpa_printf(MSG_WARNING, "SCARD: unexpected data "
"length for GSM auth (len=%ld, expected 14)",
(long) len);
return -5;
}
os_memcpy(sres, buf, 4);
os_memcpy(kc, buf + 4, 8);
} else {
if (len != 1 + 4 + 1 + 8 + 2) {
wpa_printf(MSG_WARNING, "SCARD: unexpected data "
"length for USIM auth (len=%ld, "
"expected 16)", (long) len);
return -5;
}
if (buf[0] != 4 || buf[5] != 8) {
wpa_printf(MSG_WARNING, "SCARD: unexpected SREC/Kc "
"length (%d %d, expected 4 8)",
buf[0], buf[5]);
}
os_memcpy(sres, buf + 1, 4);
os_memcpy(kc, buf + 6, 8);
}
wpa_hexdump(MSG_DEBUG, "SCARD: GSM auth - SRES", sres, 4);
wpa_hexdump(MSG_DEBUG, "SCARD: GSM auth - Kc", kc, 8);
return 0;
}
/**
* scard_umts_auth - Run UMTS authentication command on USIM card
* @scard: Pointer to private data from scard_init()
* @_rand: 16-byte RAND value from HLR/AuC
* @autn: 16-byte AUTN value from HLR/AuC
* @res: 16-byte buffer for RES
* @res_len: Variable that will be set to RES length
* @ik: 16-byte buffer for IK
* @ck: 16-byte buffer for CK
* @auts: 14-byte buffer for AUTS
* Returns: 0 on success, -1 on failure, or -2 if USIM reports synchronization
* failure
*
* This function performs AKA authentication using USIM card and the provided
* RAND and AUTN values from HLR/AuC. If authentication command can be
* completed successfully, RES, IK, and CK values will be written into provided
* buffers and res_len is set to length of received RES value. If USIM reports
* synchronization failure, the received AUTS value will be written into auts
* buffer. In this case, RES, IK, and CK are not valid.
*/
int scard_umts_auth(struct scard_data *scard, const unsigned char *_rand,
const unsigned char *autn,
unsigned char *res, size_t *res_len,
unsigned char *ik, unsigned char *ck, unsigned char *auts)
{
unsigned char cmd[5 + 1 + AKA_RAND_LEN + 1 + AKA_AUTN_LEN] =
{ USIM_CMD_RUN_UMTS_ALG };
unsigned char get_resp[5] = { USIM_CMD_GET_RESPONSE };
unsigned char resp[3], buf[64], *pos, *end;
size_t len;
long ret;
if (scard == NULL)
return -1;
if (scard->sim_type == SCARD_GSM_SIM) {
wpa_printf(MSG_ERROR, "SCARD: Non-USIM card - cannot do UMTS "
"auth");
return -1;
}
wpa_hexdump(MSG_DEBUG, "SCARD: UMTS auth - RAND", _rand, AKA_RAND_LEN);
wpa_hexdump(MSG_DEBUG, "SCARD: UMTS auth - AUTN", autn, AKA_AUTN_LEN);
cmd[5] = AKA_RAND_LEN;
os_memcpy(cmd + 6, _rand, AKA_RAND_LEN);
cmd[6 + AKA_RAND_LEN] = AKA_AUTN_LEN;
os_memcpy(cmd + 6 + AKA_RAND_LEN + 1, autn, AKA_AUTN_LEN);
len = sizeof(resp);
ret = scard_transmit(scard, cmd, sizeof(cmd), resp, &len);
if (ret != SCARD_S_SUCCESS)
return -1;
if (len <= sizeof(resp))
wpa_hexdump(MSG_DEBUG, "SCARD: UMTS alg response", resp, len);
if (len == 2 && resp[0] == 0x98 && resp[1] == 0x62) {
wpa_printf(MSG_WARNING, "SCARD: UMTS auth failed - "
"MAC != XMAC");
return -1;
} else if (len != 2 || resp[0] != 0x61) {
wpa_printf(MSG_WARNING, "SCARD: unexpected response for UMTS "
"auth request (len=%ld resp=%02x %02x)",
(long) len, resp[0], resp[1]);
return -1;
}
get_resp[4] = resp[1];
len = sizeof(buf);
ret = scard_transmit(scard, get_resp, sizeof(get_resp), buf, &len);
if (ret != SCARD_S_SUCCESS || len > sizeof(buf))
return -1;
wpa_hexdump(MSG_DEBUG, "SCARD: UMTS get response result", buf, len);
if (len >= 2 + AKA_AUTS_LEN && buf[0] == 0xdc &&
buf[1] == AKA_AUTS_LEN) {
wpa_printf(MSG_DEBUG, "SCARD: UMTS Synchronization-Failure");
os_memcpy(auts, buf + 2, AKA_AUTS_LEN);
wpa_hexdump(MSG_DEBUG, "SCARD: AUTS", auts, AKA_AUTS_LEN);
return -2;
} else if (len >= 6 + IK_LEN + CK_LEN && buf[0] == 0xdb) {
pos = buf + 1;
end = buf + len;
/* RES */
if (pos[0] > RES_MAX_LEN || pos + pos[0] > end) {
wpa_printf(MSG_DEBUG, "SCARD: Invalid RES");
return -1;
}
*res_len = *pos++;
os_memcpy(res, pos, *res_len);
pos += *res_len;
wpa_hexdump(MSG_DEBUG, "SCARD: RES", res, *res_len);
/* CK */
if (pos[0] != CK_LEN || pos + CK_LEN > end) {
wpa_printf(MSG_DEBUG, "SCARD: Invalid CK");
return -1;
}
pos++;
os_memcpy(ck, pos, CK_LEN);
pos += CK_LEN;
wpa_hexdump(MSG_DEBUG, "SCARD: CK", ck, CK_LEN);
/* IK */
if (pos[0] != IK_LEN || pos + IK_LEN > end) {
wpa_printf(MSG_DEBUG, "SCARD: Invalid IK");
return -1;
}
pos++;
os_memcpy(ik, pos, IK_LEN);
pos += IK_LEN;
wpa_hexdump(MSG_DEBUG, "SCARD: IK", ik, IK_LEN);
return 0;
}
wpa_printf(MSG_DEBUG, "SCARD: Unrecognized response");
return -1;
}