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qemu-e2k/libcacard/card_7816.c
Markus Armbruster ec15993d9d libcacard: Drop superfluous conditionals around g_free() 
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
2014-06-10 19:39:34 +04:00

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/*
* Implement the 7816 portion of the card spec
*
* This code is licensed under the GNU LGPL, version 2.1 or later.
* See the COPYING.LIB file in the top-level directory.
*/
#include "qemu-common.h"
#include "vcard.h"
#include "vcard_emul.h"
#include "card_7816.h"
/*
* set the status bytes based on the status word
*/
static void
vcard_response_set_status(VCardResponse *response, vcard_7816_status_t status)
{
unsigned char sw1, sw2;
response->b_status = status; /* make sure the status and swX representations
* are consistent */
sw1 = (status >> 8) & 0xff;
sw2 = status & 0xff;
response->b_sw1 = sw1;
response->b_sw2 = sw2;
response->b_data[response->b_len] = sw1;
response->b_data[response->b_len+1] = sw2;
}
/*
* set the status bytes in a response buffer
*/
static void
vcard_response_set_status_bytes(VCardResponse *response,
unsigned char sw1, unsigned char sw2)
{
response->b_status = sw1 << 8 | sw2;
response->b_sw1 = sw1;
response->b_sw2 = sw2;
response->b_data[response->b_len] = sw1;
response->b_data[response->b_len+1] = sw2;
}
/*
* allocate a VCardResponse structure, plus space for the data buffer, and
* set up everything but the resonse bytes.
*/
VCardResponse *
vcard_response_new_data(unsigned char *buf, int len)
{
VCardResponse *new_response;
new_response = g_new(VCardResponse, 1);
new_response->b_data = g_malloc(len + 2);
memcpy(new_response->b_data, buf, len);
new_response->b_total_len = len+2;
new_response->b_len = len;
new_response->b_type = VCARD_MALLOC;
return new_response;
}
static VCardResponse *
vcard_init_buffer_response(VCard *card, unsigned char *buf, int len)
{
VCardResponse *response;
VCardBufferResponse *buffer_response;
buffer_response = vcard_get_buffer_response(card);
if (buffer_response) {
vcard_set_buffer_response(card, NULL);
vcard_buffer_response_delete(buffer_response);
}
buffer_response = vcard_buffer_response_new(buf, len);
if (buffer_response == NULL) {
return NULL;
}
response = vcard_response_new_status_bytes(VCARD7816_SW1_RESPONSE_BYTES,
len > 255 ? 0 : len);
if (response == NULL) {
return NULL;
}
vcard_set_buffer_response(card, buffer_response);
return response;
}
/*
* general buffer to hold results from APDU calls
*/
VCardResponse *
vcard_response_new(VCard *card, unsigned char *buf,
int len, int Le, vcard_7816_status_t status)
{
VCardResponse *new_response;
if (len > Le) {
return vcard_init_buffer_response(card, buf, len);
}
new_response = vcard_response_new_data(buf, len);
if (new_response == NULL) {
return NULL;
}
vcard_response_set_status(new_response, status);
return new_response;
}
/*
* general buffer to hold results from APDU calls
*/
VCardResponse *
vcard_response_new_bytes(VCard *card, unsigned char *buf, int len, int Le,
unsigned char sw1, unsigned char sw2)
{
VCardResponse *new_response;
if (len > Le) {
return vcard_init_buffer_response(card, buf, len);
}
new_response = vcard_response_new_data(buf, len);
if (new_response == NULL) {
return NULL;
}
vcard_response_set_status_bytes(new_response, sw1, sw2);
return new_response;
}
/*
* get a new Response buffer that only has a status.
*/
static VCardResponse *
vcard_response_new_status(vcard_7816_status_t status)
{
VCardResponse *new_response;
new_response = g_new(VCardResponse, 1);
new_response->b_data = &new_response->b_sw1;
new_response->b_len = 0;
new_response->b_total_len = 2;
new_response->b_type = VCARD_MALLOC_STRUCT;
vcard_response_set_status(new_response, status);
return new_response;
}
/*
* same as above, but specify the status as separate bytes
*/
VCardResponse *
vcard_response_new_status_bytes(unsigned char sw1, unsigned char sw2)
{
VCardResponse *new_response;
new_response = g_new(VCardResponse, 1);
new_response->b_data = &new_response->b_sw1;
new_response->b_len = 0;
new_response->b_total_len = 2;
new_response->b_type = VCARD_MALLOC_STRUCT;
vcard_response_set_status_bytes(new_response, sw1, sw2);
return new_response;
}
/*
* free the response buffer. The Buffer has a type to handle the buffer
* allocated in other ways than through malloc.
*/
void
vcard_response_delete(VCardResponse *response)
{
if (response == NULL) {
return;
}
switch (response->b_type) {
case VCARD_MALLOC:
/* everything was malloc'ed */
g_free(response->b_data);
g_free(response);
break;
case VCARD_MALLOC_DATA:
/* only the data buffer was malloc'ed */
g_free(response->b_data);
break;
case VCARD_MALLOC_STRUCT:
/* only the structure was malloc'ed */
g_free(response);
break;
case VCARD_STATIC:
break;
}
}
/*
* decode the class bit and set our generic type field, channel, and
* secure messaging values.
*/
static vcard_7816_status_t
vcard_apdu_set_class(VCardAPDU *apdu) {
apdu->a_channel = 0;
apdu->a_secure_messaging = 0;
apdu->a_type = apdu->a_cla & 0xf0;
apdu->a_gen_type = VCARD_7816_ISO;
/* parse the class tables 8 & 9 of the 7816-4 Part 4 spec */
switch (apdu->a_type) {
/* we only support the basic types */
case 0x00:
case 0x80:
case 0x90:
case 0xa0:
apdu->a_channel = apdu->a_cla & 3;
apdu->a_secure_messaging = apdu->a_cla & 0xe;
break;
case 0xb0:
case 0xc0:
break;
case 0x10:
case 0x20:
case 0x30:
case 0x40:
case 0x50:
case 0x60:
case 0x70:
/* Reserved for future use */
apdu->a_gen_type = VCARD_7816_RFU;
break;
case 0xd0:
case 0xe0:
case 0xf0:
default:
apdu->a_gen_type =
(apdu->a_cla == 0xff) ? VCARD_7816_PTS : VCARD_7816_PROPRIETARY;
break;
}
return VCARD7816_STATUS_SUCCESS;
}
/*
* set the Le and Lc fields according to table 5 of the
* 7816-4 part 4 spec
*/
static vcard_7816_status_t
vcard_apdu_set_length(VCardAPDU *apdu)
{
int L, Le;
/* process according to table 5 of the 7816-4 Part 4 spec.
* variable names match the variables in the spec */
L = apdu->a_len-4; /* fixed APDU header */
apdu->a_Lc = 0;
apdu->a_Le = 0;
apdu->a_body = NULL;
switch (L) {
case 0:
/* 1 minimal apdu */
return VCARD7816_STATUS_SUCCESS;
case 1:
/* 2S only return values apdu */
/* zero maps to 256 here */
apdu->a_Le = apdu->a_header->ah_Le ?
apdu->a_header->ah_Le : 256;
return VCARD7816_STATUS_SUCCESS;
default:
/* if the ah_Le byte is zero and we have more than
* 1 byte in the header, then we must be using extended Le and Lc.
* process the extended now. */
if (apdu->a_header->ah_Le == 0) {
if (L < 3) {
/* coding error, need at least 3 bytes */
return VCARD7816_STATUS_ERROR_WRONG_LENGTH;
}
/* calculate the first extended value. Could be either Le or Lc */
Le = (apdu->a_header->ah_body[0] << 8)
|| apdu->a_header->ah_body[1];
if (L == 3) {
/* 2E extended, return data only */
/* zero maps to 65536 */
apdu->a_Le = Le ? Le : 65536;
return VCARD7816_STATUS_SUCCESS;
}
if (Le == 0) {
/* reserved for future use, probably for next time we need
* to extend the lengths */
return VCARD7816_STATUS_ERROR_WRONG_LENGTH;
}
/* we know that the first extended value is Lc now */
apdu->a_Lc = Le;
apdu->a_body = &apdu->a_header->ah_body[2];
if (L == Le+3) {
/* 3E extended, only body parameters */
return VCARD7816_STATUS_SUCCESS;
}
if (L == Le+5) {
/* 4E extended, parameters and return data */
Le = (apdu->a_data[apdu->a_len-2] << 8)
|| apdu->a_data[apdu->a_len-1];
apdu->a_Le = Le ? Le : 65536;
return VCARD7816_STATUS_SUCCESS;
}
return VCARD7816_STATUS_ERROR_WRONG_LENGTH;
}
/* not extended */
apdu->a_Lc = apdu->a_header->ah_Le;
apdu->a_body = &apdu->a_header->ah_body[0];
if (L == apdu->a_Lc + 1) {
/* 3S only body parameters */
return VCARD7816_STATUS_SUCCESS;
}
if (L == apdu->a_Lc + 2) {
/* 4S parameters and return data */
Le = apdu->a_data[apdu->a_len-1];
apdu->a_Le = Le ? Le : 256;
return VCARD7816_STATUS_SUCCESS;
}
break;
}
return VCARD7816_STATUS_ERROR_WRONG_LENGTH;
}
/*
* create a new APDU from a raw set of bytes. This will decode all the
* above fields. users of VCARDAPDU's can then depend on the already decoded
* values.
*/
VCardAPDU *
vcard_apdu_new(unsigned char *raw_apdu, int len, vcard_7816_status_t *status)
{
VCardAPDU *new_apdu;
*status = VCARD7816_STATUS_EXC_ERROR_MEMORY_FAILURE;
if (len < 4) {
*status = VCARD7816_STATUS_ERROR_WRONG_LENGTH;
return NULL;
}
new_apdu = g_new(VCardAPDU, 1);
new_apdu->a_data = g_memdup(raw_apdu, len);
new_apdu->a_len = len;
*status = vcard_apdu_set_class(new_apdu);
if (*status != VCARD7816_STATUS_SUCCESS) {
g_free(new_apdu);
return NULL;
}
*status = vcard_apdu_set_length(new_apdu);
if (*status != VCARD7816_STATUS_SUCCESS) {
g_free(new_apdu);
new_apdu = NULL;
}
return new_apdu;
}
void
vcard_apdu_delete(VCardAPDU *apdu)
{
if (apdu == NULL) {
return;
}
g_free(apdu->a_data);
g_free(apdu);
}
/*
* declare response buffers for all the 7816 defined error codes
*/
VCARD_RESPONSE_NEW_STATIC_STATUS(VCARD7816_STATUS_SUCCESS)
VCARD_RESPONSE_NEW_STATIC_STATUS(VCARD7816_STATUS_WARNING)
VCARD_RESPONSE_NEW_STATIC_STATUS(VCARD7816_STATUS_WARNING_RET_CORUPT)
VCARD_RESPONSE_NEW_STATIC_STATUS(VCARD7816_STATUS_WARNING_BUF_END_BEFORE_LE)
VCARD_RESPONSE_NEW_STATIC_STATUS(VCARD7816_STATUS_WARNING_INVALID_FILE_SELECTED)
VCARD_RESPONSE_NEW_STATIC_STATUS(VCARD7816_STATUS_WARNING_FCI_FORMAT_INVALID)
VCARD_RESPONSE_NEW_STATIC_STATUS(VCARD7816_STATUS_WARNING_CHANGE)
VCARD_RESPONSE_NEW_STATIC_STATUS(VCARD7816_STATUS_WARNING_FILE_FILLED)
VCARD_RESPONSE_NEW_STATIC_STATUS(VCARD7816_STATUS_EXC_ERROR)
VCARD_RESPONSE_NEW_STATIC_STATUS(VCARD7816_STATUS_EXC_ERROR_CHANGE)
VCARD_RESPONSE_NEW_STATIC_STATUS(VCARD7816_STATUS_EXC_ERROR_MEMORY_FAILURE)
VCARD_RESPONSE_NEW_STATIC_STATUS(VCARD7816_STATUS_ERROR_WRONG_LENGTH)
VCARD_RESPONSE_NEW_STATIC_STATUS(VCARD7816_STATUS_ERROR_CLA_NOT_SUPPORTED)
VCARD_RESPONSE_NEW_STATIC_STATUS(VCARD7816_STATUS_ERROR_CHANNEL_NOT_SUPPORTED)
VCARD_RESPONSE_NEW_STATIC_STATUS(VCARD7816_STATUS_ERROR_SECURE_NOT_SUPPORTED)
VCARD_RESPONSE_NEW_STATIC_STATUS(VCARD7816_STATUS_ERROR_COMMAND_NOT_SUPPORTED)
VCARD_RESPONSE_NEW_STATIC_STATUS(
VCARD7816_STATUS_ERROR_COMMAND_INCOMPATIBLE_WITH_FILE)
VCARD_RESPONSE_NEW_STATIC_STATUS(VCARD7816_STATUS_ERROR_SECURITY_NOT_SATISFIED)
VCARD_RESPONSE_NEW_STATIC_STATUS(VCARD7816_STATUS_ERROR_AUTHENTICATION_BLOCKED)
VCARD_RESPONSE_NEW_STATIC_STATUS(VCARD7816_STATUS_ERROR_DATA_INVALID)
VCARD_RESPONSE_NEW_STATIC_STATUS(VCARD7816_STATUS_ERROR_CONDITION_NOT_SATISFIED)
VCARD_RESPONSE_NEW_STATIC_STATUS(VCARD7816_STATUS_ERROR_DATA_NO_EF)
VCARD_RESPONSE_NEW_STATIC_STATUS(VCARD7816_STATUS_ERROR_SM_OBJECT_MISSING)
VCARD_RESPONSE_NEW_STATIC_STATUS(VCARD7816_STATUS_ERROR_SM_OBJECT_INCORRECT)
VCARD_RESPONSE_NEW_STATIC_STATUS(VCARD7816_STATUS_ERROR_WRONG_PARAMETERS)
VCARD_RESPONSE_NEW_STATIC_STATUS(
VCARD7816_STATUS_ERROR_WRONG_PARAMETERS_IN_DATA)
VCARD_RESPONSE_NEW_STATIC_STATUS(VCARD7816_STATUS_ERROR_FUNCTION_NOT_SUPPORTED)
VCARD_RESPONSE_NEW_STATIC_STATUS(VCARD7816_STATUS_ERROR_FILE_NOT_FOUND)
VCARD_RESPONSE_NEW_STATIC_STATUS(VCARD7816_STATUS_ERROR_RECORD_NOT_FOUND)
VCARD_RESPONSE_NEW_STATIC_STATUS(VCARD7816_STATUS_ERROR_NO_SPACE_FOR_FILE)
VCARD_RESPONSE_NEW_STATIC_STATUS(VCARD7816_STATUS_ERROR_LC_TLV_INCONSISTENT)
VCARD_RESPONSE_NEW_STATIC_STATUS(VCARD7816_STATUS_ERROR_P1_P2_INCORRECT)
VCARD_RESPONSE_NEW_STATIC_STATUS(VCARD7816_STATUS_ERROR_LC_P1_P2_INCONSISTENT)
VCARD_RESPONSE_NEW_STATIC_STATUS(VCARD7816_STATUS_ERROR_DATA_NOT_FOUND)
VCARD_RESPONSE_NEW_STATIC_STATUS(VCARD7816_STATUS_ERROR_WRONG_PARAMETERS_2)
VCARD_RESPONSE_NEW_STATIC_STATUS(VCARD7816_STATUS_ERROR_INS_CODE_INVALID)
VCARD_RESPONSE_NEW_STATIC_STATUS(VCARD7816_STATUS_ERROR_CLA_INVALID)
VCARD_RESPONSE_NEW_STATIC_STATUS(VCARD7816_STATUS_ERROR_GENERAL)
/*
* return a single response code. This function cannot fail. It will always
* return a response.
*/
VCardResponse *
vcard_make_response(vcard_7816_status_t status)
{
VCardResponse *response;
switch (status) {
/* known 7816 response codes */
case VCARD7816_STATUS_SUCCESS:
return VCARD_RESPONSE_GET_STATIC(
VCARD7816_STATUS_SUCCESS);
case VCARD7816_STATUS_WARNING:
return VCARD_RESPONSE_GET_STATIC(
VCARD7816_STATUS_WARNING);
case VCARD7816_STATUS_WARNING_RET_CORUPT:
return VCARD_RESPONSE_GET_STATIC(
VCARD7816_STATUS_WARNING_RET_CORUPT);
case VCARD7816_STATUS_WARNING_BUF_END_BEFORE_LE:
return VCARD_RESPONSE_GET_STATIC(
VCARD7816_STATUS_WARNING_BUF_END_BEFORE_LE);
case VCARD7816_STATUS_WARNING_INVALID_FILE_SELECTED:
return VCARD_RESPONSE_GET_STATIC(
VCARD7816_STATUS_WARNING_INVALID_FILE_SELECTED);
case VCARD7816_STATUS_WARNING_FCI_FORMAT_INVALID:
return VCARD_RESPONSE_GET_STATIC(
VCARD7816_STATUS_WARNING_FCI_FORMAT_INVALID);
case VCARD7816_STATUS_WARNING_CHANGE:
return VCARD_RESPONSE_GET_STATIC(
VCARD7816_STATUS_WARNING_CHANGE);
case VCARD7816_STATUS_WARNING_FILE_FILLED:
return VCARD_RESPONSE_GET_STATIC(
VCARD7816_STATUS_WARNING_FILE_FILLED);
case VCARD7816_STATUS_EXC_ERROR:
return VCARD_RESPONSE_GET_STATIC(
VCARD7816_STATUS_EXC_ERROR);
case VCARD7816_STATUS_EXC_ERROR_CHANGE:
return VCARD_RESPONSE_GET_STATIC(
VCARD7816_STATUS_EXC_ERROR_CHANGE);
case VCARD7816_STATUS_EXC_ERROR_MEMORY_FAILURE:
return VCARD_RESPONSE_GET_STATIC(
VCARD7816_STATUS_EXC_ERROR_MEMORY_FAILURE);
case VCARD7816_STATUS_ERROR_WRONG_LENGTH:
return VCARD_RESPONSE_GET_STATIC(
VCARD7816_STATUS_ERROR_WRONG_LENGTH);
case VCARD7816_STATUS_ERROR_CLA_NOT_SUPPORTED:
return VCARD_RESPONSE_GET_STATIC(
VCARD7816_STATUS_ERROR_CLA_NOT_SUPPORTED);
case VCARD7816_STATUS_ERROR_CHANNEL_NOT_SUPPORTED:
return VCARD_RESPONSE_GET_STATIC(
VCARD7816_STATUS_ERROR_CHANNEL_NOT_SUPPORTED);
case VCARD7816_STATUS_ERROR_SECURE_NOT_SUPPORTED:
return VCARD_RESPONSE_GET_STATIC(
VCARD7816_STATUS_ERROR_SECURE_NOT_SUPPORTED);
case VCARD7816_STATUS_ERROR_COMMAND_NOT_SUPPORTED:
return VCARD_RESPONSE_GET_STATIC(
VCARD7816_STATUS_ERROR_COMMAND_NOT_SUPPORTED);
case VCARD7816_STATUS_ERROR_COMMAND_INCOMPATIBLE_WITH_FILE:
return VCARD_RESPONSE_GET_STATIC(
VCARD7816_STATUS_ERROR_COMMAND_INCOMPATIBLE_WITH_FILE);
case VCARD7816_STATUS_ERROR_SECURITY_NOT_SATISFIED:
return VCARD_RESPONSE_GET_STATIC(
VCARD7816_STATUS_ERROR_SECURITY_NOT_SATISFIED);
case VCARD7816_STATUS_ERROR_AUTHENTICATION_BLOCKED:
return VCARD_RESPONSE_GET_STATIC(
VCARD7816_STATUS_ERROR_AUTHENTICATION_BLOCKED);
case VCARD7816_STATUS_ERROR_DATA_INVALID:
return VCARD_RESPONSE_GET_STATIC(
VCARD7816_STATUS_ERROR_DATA_INVALID);
case VCARD7816_STATUS_ERROR_CONDITION_NOT_SATISFIED:
return VCARD_RESPONSE_GET_STATIC(
VCARD7816_STATUS_ERROR_CONDITION_NOT_SATISFIED);
case VCARD7816_STATUS_ERROR_DATA_NO_EF:
return VCARD_RESPONSE_GET_STATIC(
VCARD7816_STATUS_ERROR_DATA_NO_EF);
case VCARD7816_STATUS_ERROR_SM_OBJECT_MISSING:
return VCARD_RESPONSE_GET_STATIC(
VCARD7816_STATUS_ERROR_SM_OBJECT_MISSING);
case VCARD7816_STATUS_ERROR_SM_OBJECT_INCORRECT:
return VCARD_RESPONSE_GET_STATIC(
VCARD7816_STATUS_ERROR_SM_OBJECT_INCORRECT);
case VCARD7816_STATUS_ERROR_WRONG_PARAMETERS:
return VCARD_RESPONSE_GET_STATIC(
VCARD7816_STATUS_ERROR_WRONG_PARAMETERS);
case VCARD7816_STATUS_ERROR_WRONG_PARAMETERS_IN_DATA:
return VCARD_RESPONSE_GET_STATIC(
VCARD7816_STATUS_ERROR_WRONG_PARAMETERS_IN_DATA);
case VCARD7816_STATUS_ERROR_FUNCTION_NOT_SUPPORTED:
return VCARD_RESPONSE_GET_STATIC(
VCARD7816_STATUS_ERROR_FUNCTION_NOT_SUPPORTED);
case VCARD7816_STATUS_ERROR_FILE_NOT_FOUND:
return VCARD_RESPONSE_GET_STATIC(
VCARD7816_STATUS_ERROR_FILE_NOT_FOUND);
case VCARD7816_STATUS_ERROR_RECORD_NOT_FOUND:
return VCARD_RESPONSE_GET_STATIC(
VCARD7816_STATUS_ERROR_RECORD_NOT_FOUND);
case VCARD7816_STATUS_ERROR_NO_SPACE_FOR_FILE:
return VCARD_RESPONSE_GET_STATIC(
VCARD7816_STATUS_ERROR_NO_SPACE_FOR_FILE);
case VCARD7816_STATUS_ERROR_LC_TLV_INCONSISTENT:
return VCARD_RESPONSE_GET_STATIC(
VCARD7816_STATUS_ERROR_LC_TLV_INCONSISTENT);
case VCARD7816_STATUS_ERROR_P1_P2_INCORRECT:
return VCARD_RESPONSE_GET_STATIC(
VCARD7816_STATUS_ERROR_P1_P2_INCORRECT);
case VCARD7816_STATUS_ERROR_LC_P1_P2_INCONSISTENT:
return VCARD_RESPONSE_GET_STATIC(
VCARD7816_STATUS_ERROR_LC_P1_P2_INCONSISTENT);
case VCARD7816_STATUS_ERROR_DATA_NOT_FOUND:
return VCARD_RESPONSE_GET_STATIC(
VCARD7816_STATUS_ERROR_DATA_NOT_FOUND);
case VCARD7816_STATUS_ERROR_WRONG_PARAMETERS_2:
return VCARD_RESPONSE_GET_STATIC(
VCARD7816_STATUS_ERROR_WRONG_PARAMETERS_2);
case VCARD7816_STATUS_ERROR_INS_CODE_INVALID:
return VCARD_RESPONSE_GET_STATIC(
VCARD7816_STATUS_ERROR_INS_CODE_INVALID);
case VCARD7816_STATUS_ERROR_CLA_INVALID:
return VCARD_RESPONSE_GET_STATIC(
VCARD7816_STATUS_ERROR_CLA_INVALID);
case VCARD7816_STATUS_ERROR_GENERAL:
return VCARD_RESPONSE_GET_STATIC(
VCARD7816_STATUS_ERROR_GENERAL);
default:
/* we don't know this status code, create a response buffer to
* hold it */
response = vcard_response_new_status(status);
if (response == NULL) {
/* couldn't allocate the buffer, return memmory error */
return VCARD_RESPONSE_GET_STATIC(
VCARD7816_STATUS_EXC_ERROR_MEMORY_FAILURE);
}
return response;
}
}
/*
* Add File card support here if you need it.
*/
static VCardStatus
vcard7816_file_system_process_apdu(VCard *card, VCardAPDU *apdu,
VCardResponse **response)
{
/* TODO: if we want to support a virtual file system card, we do it here.
* It would probably be a pkcs #15 card type */
*response = vcard_make_response(
VCARD7816_STATUS_ERROR_COMMAND_NOT_SUPPORTED);
return VCARD_DONE;
}
/*
* VM card (including java cards)
*/
static VCardStatus
vcard7816_vm_process_apdu(VCard *card, VCardAPDU *apdu,
VCardResponse **response)
{
int bytes_to_copy, next_byte_count, count;
VCardApplet *current_applet;
VCardBufferResponse *buffer_response;
vcard_7816_status_t status;
/* parse the class first */
if (apdu->a_gen_type != VCARD_7816_ISO) {
*response = vcard_make_response(
VCARD7816_STATUS_ERROR_COMMAND_NOT_SUPPORTED);
return VCARD_DONE;
}
/* use a switch so that if we need to support secure channel stuff later,
* we know where to put it */
switch (apdu->a_secure_messaging) {
case 0x0: /* no SM */
break;
case 0x4: /* proprietary SM */
case 0x8: /* header not authenticated */
case 0xc: /* header authenticated */
default:
/* for now, don't try to support secure channel stuff in the
* virtual card. */
*response = vcard_make_response(
VCARD7816_STATUS_ERROR_SECURE_NOT_SUPPORTED);
return VCARD_DONE;
}
/* now parse the instruction */
switch (apdu->a_ins) {
case VCARD7816_INS_MANAGE_CHANNEL: /* secure channel op */
case VCARD7816_INS_EXTERNAL_AUTHENTICATE: /* secure channel op */
case VCARD7816_INS_GET_CHALLENGE: /* secure channel op */
case VCARD7816_INS_INTERNAL_AUTHENTICATE: /* secure channel op */
case VCARD7816_INS_ERASE_BINARY: /* applet control op */
case VCARD7816_INS_READ_BINARY: /* applet control op */
case VCARD7816_INS_WRITE_BINARY: /* applet control op */
case VCARD7816_INS_UPDATE_BINARY: /* applet control op */
case VCARD7816_INS_READ_RECORD: /* file op */
case VCARD7816_INS_WRITE_RECORD: /* file op */
case VCARD7816_INS_UPDATE_RECORD: /* file op */
case VCARD7816_INS_APPEND_RECORD: /* file op */
case VCARD7816_INS_ENVELOPE:
case VCARD7816_INS_PUT_DATA:
*response = vcard_make_response(
VCARD7816_STATUS_ERROR_COMMAND_NOT_SUPPORTED);
break;
case VCARD7816_INS_SELECT_FILE:
if (apdu->a_p1 != 0x04) {
*response = vcard_make_response(
VCARD7816_STATUS_ERROR_FUNCTION_NOT_SUPPORTED);
break;
}
/* side effect, deselect the current applet if no applet has been found
* */
current_applet = vcard_find_applet(card, apdu->a_body, apdu->a_Lc);
vcard_select_applet(card, apdu->a_channel, current_applet);
if (current_applet) {
unsigned char *aid;
int aid_len;
aid = vcard_applet_get_aid(current_applet, &aid_len);
*response = vcard_response_new(card, aid, aid_len, apdu->a_Le,
VCARD7816_STATUS_SUCCESS);
} else {
*response = vcard_make_response(
VCARD7816_STATUS_ERROR_FILE_NOT_FOUND);
}
break;
case VCARD7816_INS_VERIFY:
if ((apdu->a_p1 != 0x00) || (apdu->a_p2 != 0x00)) {
*response = vcard_make_response(
VCARD7816_STATUS_ERROR_WRONG_PARAMETERS);
} else {
if (apdu->a_Lc == 0) {
/* handle pin count if possible */
count = vcard_emul_get_login_count(card);
if (count < 0) {
*response = vcard_make_response(
VCARD7816_STATUS_ERROR_DATA_NOT_FOUND);
} else {
if (count > 0xf) {
count = 0xf;
}
*response = vcard_response_new_status_bytes(
VCARD7816_SW1_WARNING_CHANGE,
0xc0 | count);
if (*response == NULL) {
*response = vcard_make_response(
VCARD7816_STATUS_EXC_ERROR_MEMORY_FAILURE);
}
}
} else {
status = vcard_emul_login(card, apdu->a_body, apdu->a_Lc);
*response = vcard_make_response(status);
}
}
break;
case VCARD7816_INS_GET_RESPONSE:
buffer_response = vcard_get_buffer_response(card);
if (!buffer_response) {
*response = vcard_make_response(
VCARD7816_STATUS_ERROR_DATA_NOT_FOUND);
/* handle error */
break;
}
bytes_to_copy = MIN(buffer_response->len, apdu->a_Le);
next_byte_count = MIN(256, buffer_response->len - bytes_to_copy);
*response = vcard_response_new_bytes(
card, buffer_response->current, bytes_to_copy,
apdu->a_Le,
next_byte_count ?
VCARD7816_SW1_RESPONSE_BYTES : VCARD7816_SW1_SUCCESS,
next_byte_count);
buffer_response->current += bytes_to_copy;
buffer_response->len -= bytes_to_copy;
if (*response == NULL || (next_byte_count == 0)) {
vcard_set_buffer_response(card, NULL);
vcard_buffer_response_delete(buffer_response);
}
if (*response == NULL) {
*response =
vcard_make_response(VCARD7816_STATUS_EXC_ERROR_MEMORY_FAILURE);
}
break;
case VCARD7816_INS_GET_DATA:
*response =
vcard_make_response(VCARD7816_STATUS_ERROR_COMMAND_NOT_SUPPORTED);
break;
default:
*response =
vcard_make_response(VCARD7816_STATUS_ERROR_COMMAND_NOT_SUPPORTED);
break;
}
/* response should have been set somewhere */
assert(*response != NULL);
return VCARD_DONE;
}
/*
* APDU processing starts here. This routes the card processing stuff to the
* right location.
*/
VCardStatus
vcard_process_apdu(VCard *card, VCardAPDU *apdu, VCardResponse **response)
{
VCardStatus status;
VCardBufferResponse *buffer_response;
/* first handle any PTS commands, which aren't really APDU's */
if (apdu->a_type == VCARD_7816_PTS) {
/* the PTS responses aren't really responses either */
*response = vcard_response_new_data(apdu->a_data, apdu->a_len);
/* PTS responses have no status bytes */
(*response)->b_total_len = (*response)->b_len;
return VCARD_DONE;
}
buffer_response = vcard_get_buffer_response(card);
if (buffer_response && apdu->a_ins != VCARD7816_INS_GET_RESPONSE) {
/* clear out buffer_response, return an error */
vcard_set_buffer_response(card, NULL);
vcard_buffer_response_delete(buffer_response);
*response = vcard_make_response(VCARD7816_STATUS_EXC_ERROR);
return VCARD_DONE;
}
status = vcard_process_applet_apdu(card, apdu, response);
if (status != VCARD_NEXT) {
return status;
}
switch (vcard_get_type(card)) {
case VCARD_FILE_SYSTEM:
return vcard7816_file_system_process_apdu(card, apdu, response);
case VCARD_VM:
return vcard7816_vm_process_apdu(card, apdu, response);
case VCARD_DIRECT:
/* if we are type direct, then the applet should handle everything */
assert(!"VCARD_DIRECT: applet failure");
break;
}
*response =
vcard_make_response(VCARD7816_STATUS_ERROR_COMMAND_NOT_SUPPORTED);
return VCARD_DONE;
}
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