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// SPDX-License-Identifier: BSD-2-Clause
/*
* Copyright (c) 2014, Linaro Limited
* All rights reserved.
*/
#include <assert.h>
#include <kernel/panic.h>
#include <malloc.h>
#include <stdlib.h>
#include <string.h>
#include <tee_api_types.h>
#include <tee/se/reader.h>
#include <tee/se/session.h>
#include <tee/se/iso7816.h>
#include <tee/se/aid.h>
#include <tee/se/apdu.h>
#include <tee/se/channel.h>
#include <tee/se/util.h>
#include <tee/se/reader/interface.h>
#include <trace.h>
#include "session_priv.h"
#include "aid_priv.h"
#include "apdu_priv.h"
TEE_Result iso7816_exchange_apdu(struct tee_se_reader_proxy *proxy,
struct cmd_apdu *cmd, struct resp_apdu *resp)
{
TEE_Result ret;
assert(cmd && resp);
ret = tee_se_reader_transmit(proxy,
cmd->base.data_buf, cmd->base.length,
resp->base.data_buf, &resp->base.length);
if (ret == TEE_SUCCESS)
parse_resp_apdu(resp);
return ret;
}
int iso7816_get_cla_channel(int channel_id)
{
int cla_channel;
/*
* From GP Card Spec,
* the logical channel number 0~3 should have CLA: 0x00 ~ 0x03,
* for channel number 4~19 should have CLA: 0x40 ~ 0x4f
*/
if (channel_id < 4)
cla_channel = channel_id;
else
cla_channel = 0x40 | (channel_id - 4);
return cla_channel;
}
static TEE_Result internal_select(struct tee_se_channel *c,
struct tee_se_aid *aid, int select_ops)
{
struct cmd_apdu *cmd;
struct resp_apdu *resp;
struct tee_se_session *s;
TEE_Result ret;
TEE_SEReaderProperties prop;
size_t rx_buf_len = 0;
int channel_id;
uint8_t cla_channel;
assert(c);
s = tee_se_channel_get_session(c);
channel_id = tee_se_channel_get_id(c);
if (channel_id >= MAX_LOGICAL_CHANNEL)
panic("invalid channel id");
cla_channel = iso7816_get_cla_channel(channel_id);
if (select_ops == FIRST_OR_ONLY_OCCURRENCE) {
assert(aid);
cmd = alloc_cmd_apdu(ISO7816_CLA | cla_channel,
SELECT_CMD, SELECT_BY_AID,
select_ops, aid->length,
rx_buf_len, aid->aid);
} else {
cmd = alloc_cmd_apdu(ISO7816_CLA | cla_channel,
SELECT_CMD, SELECT_BY_AID,
select_ops, 0, rx_buf_len, NULL);
}
resp = alloc_resp_apdu(rx_buf_len);
ret = tee_se_session_transmit(s, cmd, resp);
if (ret != TEE_SUCCESS) {
EMSG("exchange apdu failed: %d", ret);
return ret;
}
tee_se_reader_get_properties(s->reader_proxy, &prop);
if (prop.selectResponseEnable)
tee_se_channel_set_select_response(c, resp);
if (aid)
tee_se_channel_set_aid(c, aid);
if (resp->sw1 == CMD_OK_SW1 && resp->sw2 == CMD_OK_SW2) {
ret = TEE_SUCCESS;
} else {
EMSG("operation failed, sw1:%02X, sw2:%02X",
resp->sw1, resp->sw2);
if (resp->sw1 == 0x6A && resp->sw2 == 0x83)
ret = TEE_ERROR_ITEM_NOT_FOUND;
else
ret = TEE_ERROR_NOT_SUPPORTED;
}
apdu_release(to_apdu_base(cmd));
apdu_release(to_apdu_base(resp));
return ret;
}
static TEE_Result internal_manage_channel(struct tee_se_session *s,
bool open_ops, int *channel_id)
{
struct cmd_apdu *cmd;
struct resp_apdu *resp;
TEE_Result ret;
size_t tx_buf_len = 0, rx_buf_len = 1;
uint8_t open_flag = (open_ops) ? OPEN_CHANNEL : CLOSE_CHANNEL;
uint8_t channel_flag =
(open_flag == OPEN_CHANNEL) ? OPEN_NEXT_AVAILABLE : *channel_id;
assert(s);
cmd = alloc_cmd_apdu(ISO7816_CLA, MANAGE_CHANNEL_CMD, open_flag,
channel_flag, tx_buf_len, rx_buf_len, NULL);
resp = alloc_resp_apdu(rx_buf_len);
ret = tee_se_session_transmit(s, cmd, resp);
if (ret != TEE_SUCCESS) {
EMSG("exchange apdu failed: %d", ret);
return ret;
}
if (resp->sw1 == CMD_OK_SW1 && resp->sw2 == CMD_OK_SW2) {
if (open_ops)
*channel_id = resp->base.data_buf[0];
ret = TEE_SUCCESS;
} else {
EMSG("operation failed, sw1:%02X, sw2:%02X",
resp->sw1, resp->sw2);
ret = TEE_ERROR_NOT_SUPPORTED;
}
apdu_release(to_apdu_base(cmd));
apdu_release(to_apdu_base(resp));
return ret;
}
TEE_Result iso7816_open_available_logical_channel(struct tee_se_session *s,
int *channel_id)
{
return internal_manage_channel(s, true, channel_id);
}
TEE_Result iso7816_close_logical_channel(struct tee_se_session *s,
int channel_id)
{
return internal_manage_channel(s, false, &channel_id);
}
TEE_Result iso7816_select(struct tee_se_channel *c, struct tee_se_aid *aid)
{
return internal_select(c, aid, FIRST_OR_ONLY_OCCURRENCE);
}
TEE_Result iso7816_select_next(struct tee_se_channel *c)
{
return internal_select(c, NULL, NEXT_OCCURRENCE);
}
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