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// SPDX-License-Identifier: BSD-2-Clause
/*
* Copyright (c) 2014, Linaro Limited
* All rights reserved.
*/
#include <assert.h>
#include <kernel/mutex.h>
#include <stdlib.h>
#include <sys/queue.h>
#include <trace.h>
#include <tee/se/reader.h>
#include <tee/se/session.h>
#include <tee/se/channel.h>
#include <tee/se/iso7816.h>
#include "session_priv.h"
#include "channel_priv.h"
struct tee_se_session *tee_se_session_alloc(
struct tee_se_reader_proxy *proxy)
{
struct tee_se_session *s;
assert(proxy);
s = malloc(sizeof(struct tee_se_session));
if (s) {
TAILQ_INIT(&s->channels);
s->reader_proxy = proxy;
}
return s;
}
void tee_se_session_free(struct tee_se_session *s)
{
free(s);
}
bool tee_se_session_is_channel_exist(struct tee_se_session *s,
struct tee_se_channel *c)
{
struct tee_se_channel *c1;
TAILQ_FOREACH(c1, &s->channels, link) {
if (c1 == c)
return true;
}
return false;
}
TEE_Result tee_se_session_get_atr(struct tee_se_session *s,
uint8_t **atr, size_t *atr_len)
{
assert(s && atr && atr_len);
return tee_se_reader_get_atr(s->reader_proxy, atr, atr_len);
}
TEE_Result tee_se_session_open_basic_channel(struct tee_se_session *s,
struct tee_se_aid *aid, struct tee_se_channel **channel)
{
struct tee_se_channel *c;
TEE_Result ret;
assert(s && channel && !*channel);
if (tee_se_reader_is_basic_channel_locked(s->reader_proxy)) {
*channel = NULL;
return TEE_ERROR_NOT_SUPPORTED;
}
c = tee_se_channel_alloc(s, 0);
if (!c)
return TEE_ERROR_OUT_OF_MEMORY;
if (aid) {
ret = iso7816_select(c, aid);
if (ret != TEE_SUCCESS)
goto err_free_channel;
}
tee_se_reader_lock_basic_channel(s->reader_proxy);
*channel = c;
TAILQ_INSERT_TAIL(&s->channels, c, link);
return TEE_SUCCESS;
err_free_channel:
tee_se_channel_free(c);
return ret;
}
TEE_Result tee_se_session_open_logical_channel(struct tee_se_session *s,
struct tee_se_aid *aid, struct tee_se_channel **channel)
{
int channel_id;
struct tee_se_channel *c;
TEE_Result ret;
assert(s && channel && !*channel);
ret = iso7816_open_available_logical_channel(s, &channel_id);
if (ret != TEE_SUCCESS)
return ret;
c = tee_se_channel_alloc(s, channel_id);
if (!c)
goto err_close_channel;
if (aid != NULL) {
ret = iso7816_select(c, aid);
if (ret != TEE_SUCCESS)
goto err_free_channel;
}
*channel = c;
TAILQ_INSERT_TAIL(&s->channels, c, link);
return TEE_SUCCESS;
err_free_channel:
tee_se_channel_free(c);
err_close_channel:
iso7816_close_logical_channel(s, channel_id);
return ret;
}
void tee_se_session_close_channel(struct tee_se_session *s,
struct tee_se_channel *c)
{
int channel_id;
assert(s && c);
channel_id = tee_se_channel_get_id(c);
if (channel_id > 0) {
iso7816_close_logical_channel(s, channel_id);
} else {
tee_se_reader_unlock_basic_channel(s->reader_proxy);
}
TAILQ_REMOVE(&s->channels, c, link);
tee_se_channel_free(c);
}
TEE_Result tee_se_session_transmit(struct tee_se_session *s,
struct cmd_apdu *c, struct resp_apdu *r)
{
struct tee_se_reader_proxy *h = s->reader_proxy;
/*
* This call might block the caller.
* The reader proxy will make sure only 1 session
* is transmitting. Others should wait until the
* activating transation finished.
*/
return iso7816_exchange_apdu(h, c, r);
}
void tee_se_session_close(struct tee_se_session *s)
{
struct tee_se_channel *c;
assert(s);
TAILQ_FOREACH(c, &s->channels, link)
tee_se_session_close_channel(s, c);
tee_se_reader_detach(s->reader_proxy);
tee_se_session_free(s);
}
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