diff options
Diffstat (limited to 'core/tee/se/session.c')
| -rw-r--r-- | core/tee/se/session.c | 194 |
1 files changed, 194 insertions, 0 deletions
diff --git a/core/tee/se/session.c b/core/tee/se/session.c new file mode 100644 index 0000000..ed28aa4 --- /dev/null +++ b/core/tee/se/session.c @@ -0,0 +1,194 @@ +/* + * Copyright (c) 2014, Linaro Limited + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" + * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE + * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR + * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF + * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + */ + +#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); +} |