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Emulated DEP targets can now be customized (NFCID3 and General Bytes).

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This commit is contained in:
Romuald Conty 2010-10-08 21:54:59 +00:00
parent b72ce3decd
commit 08b06c1d03
3 changed files with 48 additions and 15 deletions
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23
examples/nfc-dep-target.c
View file

@ -32,6 +32,8 @@
#include <nfc/nfc.h>
#include "nfc-utils.h"
#define MAX_FRAME_LEN 264
int
@ -63,14 +65,17 @@ main (int argc, const char *argv[])
return EXIT_FAILURE;
}
// Note: We have to build a "fake" nfc_target_t in order to do exactly the same that was done before the new nfc_target_init() was introduced.
nfc_target_t nt = {
.ntt = NTT_GENERIC_PASSIVE_106,
.nti.nai.abtAtqa = "\x04\x00",
.nti.nai.abtUid = "\xde\xad\xbe\xaf\x62",
.nti.nai.btSak = 0x20,
.nti.nai.szUidLen = 5,
.nti.nai.szAtsLen = 0,
const nfc_target_t nt = {
.ntt = NTT_DEP_PASSIVE_106,
.nti.ndi.abtNFCID3 = { 0x12, 0x34, 0x56, 0x78, 0x9a, 0xbc, 0xde, 0xff, 0x00, 0x00 },
.nti.ndi.szGB = 4,
.nti.ndi.abtGB = { 0x12, 0x34, 0x56, 0x78 },
/* These bytes are not used by nfc_target_init: the chip will provide them automatically to the initiator */
.nti.ndi.btDID = 0x00,
.nti.ndi.btBS = 0x00,
.nti.ndi.btBR = 0x00,
.nti.ndi.btTO = 0x00,
.nti.ndi.btPP = 0x01,
};
if (!pnd) {
@ -79,6 +84,8 @@ main (int argc, const char *argv[])
}
printf ("Connected to NFC device: %s\n", pnd->acName);
printf ("NFC device will now act as this D.E.P. target:\n");
print_nfc_dep_info ( nt.nti.ndi );
printf ("Waiting for initiator request...\n");
if(!nfc_target_init (pnd, NTM_DEP, nt, abtRx, &szRx)) {
nfc_perror(pnd, "nfc_target_init");

34
libnfc/chips/pn53x.c
View file

@ -1040,6 +1040,10 @@ pn53x_target_init (nfc_device_t * pnd, const nfc_target_mode_t ntm, const nfc_ta
byte_t abtMifareParams[6];
byte_t * pbtMifareParams = NULL;
const byte_t * pbtNFCID3t = NULL;
const byte_t * pbtGB = NULL;
size_t szGB = 0;
switch(nt.ntt) {
case NTT_MIFARE:
case NTT_GENERIC_PASSIVE_106:
@ -1058,9 +1062,16 @@ pn53x_target_init (nfc_device_t * pnd, const nfc_target_mode_t ntm, const nfc_ta
pbtMifareParams = abtMifareParams;
}
break;
case NTT_DEP_PASSIVE_106:
case NTT_DEP_PASSIVE_212:
case NTT_DEP_PASSIVE_424:
pbtNFCID3t = nt.nti.ndi.abtNFCID3;
szGB = nt.nti.ndi.szGB;
if (szGB) pbtGB = nt.nti.ndi.abtGB;
break;
}
if(!pn53x_TgInitAsTarget(pnd, ntm, pbtMifareParams, NULL, NULL, pbtRx, pszRxLen)) {
if(!pn53x_TgInitAsTarget(pnd, ntm, pbtMifareParams, NULL, pbtNFCID3t, pbtGB, szGB, pbtRx, pszRxLen)) {
return false;
}
@ -1075,12 +1086,15 @@ pn53x_target_init (nfc_device_t * pnd, const nfc_target_mode_t ntm, const nfc_ta
bool
pn53x_TgInitAsTarget (nfc_device_t * pnd, nfc_target_mode_t ntm,
const byte_t * pbtMifareParams, const byte_t * pbtFeliCaParams, const byte_t * pbtNFCID3t,
const byte_t * pbtMifareParams,
const byte_t * pbtFeliCaParams,
const byte_t * pbtNFCID3t, const byte_t * pbtGB, const size_t szGB,
byte_t * pbtRx, size_t * pszRxLen)
{
byte_t abtRx[MAX_FRAME_LEN];
size_t szRxLen;
byte_t abtCmd[sizeof (pncmd_target_init)];
byte_t abtCmd[sizeof (pncmd_target_init) + 48]; // 47 bytes max. for General Bytes and 1 for GB lenght
size_t szOptionalBytes = 0;
memcpy (abtCmd, pncmd_target_init, sizeof (pncmd_target_init));
@ -1099,11 +1113,21 @@ pn53x_TgInitAsTarget (nfc_device_t * pnd, nfc_target_mode_t ntm,
if (pbtNFCID3t) {
memcpy(abtCmd+27, pbtNFCID3t, 10);
}
// TODO Handle General bytes and Tk (Historical bytes) length
if (szGB) {
if( pnd->nc == NC_PN531 ) {
memcpy (abtCmd+37, pbtGB, szGB);
szOptionalBytes = szGB;
} else {
abtCmd[37] = (byte_t)(szGB);
memcpy (abtCmd+38, pbtGB, szGB);
szOptionalBytes = szGB + 1;
}
}
// TODO Handle Tk (Historical bytes) length (only available on PN532, PN533)
// Request the initialization as a target
szRxLen = MAX_FRAME_LEN;
if (!pn53x_transceive (pnd, abtCmd, sizeof (pncmd_target_init), abtRx, &szRxLen))
if (!pn53x_transceive (pnd, abtCmd, sizeof (pncmd_target_init) + szOptionalBytes, abtRx, &szRxLen))
return false;
// Note: the first byte is skip:

6
libnfc/chips/pn53x.h
View file

@ -144,8 +144,10 @@ bool pn53x_InRelease (nfc_device_t * pnd, const uint8_t ui8Target);
bool pn53x_InAutoPoll (nfc_device_t * pnd, const nfc_target_type_t * pnttTargetTypes, const size_t szTargetTypes,
const byte_t btPollNr, const byte_t btPeriod, nfc_target_t * pntTargets,
size_t * pszTargetFound);
bool pn53x_TgInitAsTarget (nfc_device_t * pnd, nfc_target_mode_t ntm,
const byte_t * pbtMifareParams, const byte_t * pbtFeliCaParams, const byte_t * pbtNFCID3t,
bool pn53x_TgInitAsTarget (nfc_device_t * pnd, nfc_target_mode_t ntm,
const byte_t * pbtMifareParams,
const byte_t * pbtFeliCaParams,
const byte_t * pbtNFCID3t, const byte_t * pbtGB, const size_t szGB,
byte_t * pbtRx, size_t * pszRxLen);