184 lines
5.6 KiB
C
184 lines
5.6 KiB
C
/*
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* Minimal TPM emulator for TPM test cases
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*
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* Copyright (c) 2018 Red Hat, Inc.
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*
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* Authors:
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* Marc-André Lureau <marcandre.lureau@redhat.com>
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*
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* This work is licensed under the terms of the GNU GPL, version 2 or later.
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* See the COPYING file in the top-level directory.
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*/
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#include "qemu/osdep.h"
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#include <glib/gstdio.h>
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#include "hw/tpm/tpm_ioctl.h"
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#include "io/channel-socket.h"
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#include "qapi/error.h"
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#include "tpm-emu.h"
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void tpm_emu_test_wait_cond(TestState *s)
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{
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gint64 end_time = g_get_monotonic_time() + 5 * G_TIME_SPAN_SECOND;
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g_mutex_lock(&s->data_mutex);
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if (!s->data_cond_signal &&
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!g_cond_wait_until(&s->data_cond, &s->data_mutex, end_time)) {
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g_assert_not_reached();
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}
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s->data_cond_signal = false;
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g_mutex_unlock(&s->data_mutex);
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}
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static void *tpm_emu_tpm_thread(void *data)
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{
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TestState *s = data;
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QIOChannel *ioc = s->tpm_ioc;
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s->tpm_msg = g_new(struct tpm_hdr, 1);
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while (true) {
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int minhlen = sizeof(s->tpm_msg->tag) + sizeof(s->tpm_msg->len);
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if (!qio_channel_read(ioc, (char *)s->tpm_msg, minhlen, &error_abort)) {
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break;
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}
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s->tpm_msg->tag = be16_to_cpu(s->tpm_msg->tag);
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s->tpm_msg->len = be32_to_cpu(s->tpm_msg->len);
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g_assert_cmpint(s->tpm_msg->len, >=, minhlen);
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g_assert_cmpint(s->tpm_msg->tag, ==, TPM2_ST_NO_SESSIONS);
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s->tpm_msg = g_realloc(s->tpm_msg, s->tpm_msg->len);
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qio_channel_read(ioc, (char *)&s->tpm_msg->code,
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s->tpm_msg->len - minhlen, &error_abort);
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s->tpm_msg->code = be32_to_cpu(s->tpm_msg->code);
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/* reply error */
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s->tpm_msg->tag = cpu_to_be16(TPM2_ST_NO_SESSIONS);
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s->tpm_msg->len = cpu_to_be32(sizeof(struct tpm_hdr));
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s->tpm_msg->code = cpu_to_be32(TPM_RC_FAILURE);
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qio_channel_write(ioc, (char *)s->tpm_msg, be32_to_cpu(s->tpm_msg->len),
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&error_abort);
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}
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g_free(s->tpm_msg);
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s->tpm_msg = NULL;
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object_unref(OBJECT(s->tpm_ioc));
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return NULL;
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}
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void *tpm_emu_ctrl_thread(void *data)
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{
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TestState *s = data;
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QIOChannelSocket *lioc = qio_channel_socket_new();
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QIOChannel *ioc;
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qio_channel_socket_listen_sync(lioc, s->addr, &error_abort);
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g_mutex_lock(&s->data_mutex);
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s->data_cond_signal = true;
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g_mutex_unlock(&s->data_mutex);
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g_cond_signal(&s->data_cond);
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qio_channel_wait(QIO_CHANNEL(lioc), G_IO_IN);
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ioc = QIO_CHANNEL(qio_channel_socket_accept(lioc, &error_abort));
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g_assert(ioc);
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{
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uint32_t cmd = 0;
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struct iovec iov = { .iov_base = &cmd, .iov_len = sizeof(cmd) };
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int *pfd = NULL;
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size_t nfd = 0;
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qio_channel_readv_full(ioc, &iov, 1, &pfd, &nfd, &error_abort);
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cmd = be32_to_cpu(cmd);
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g_assert_cmpint(cmd, ==, CMD_SET_DATAFD);
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g_assert_cmpint(nfd, ==, 1);
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s->tpm_ioc = QIO_CHANNEL(qio_channel_socket_new_fd(*pfd, &error_abort));
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g_free(pfd);
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cmd = 0;
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qio_channel_write(ioc, (char *)&cmd, sizeof(cmd), &error_abort);
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s->emu_tpm_thread = g_thread_new(NULL, tpm_emu_tpm_thread, s);
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}
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while (true) {
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uint32_t cmd;
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ssize_t ret;
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ret = qio_channel_read(ioc, (char *)&cmd, sizeof(cmd), NULL);
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if (ret <= 0) {
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break;
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}
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cmd = be32_to_cpu(cmd);
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switch (cmd) {
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case CMD_GET_CAPABILITY: {
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ptm_cap cap = cpu_to_be64(0x3fff);
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qio_channel_write(ioc, (char *)&cap, sizeof(cap), &error_abort);
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break;
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}
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case CMD_INIT: {
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ptm_init init;
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qio_channel_read(ioc, (char *)&init.u.req, sizeof(init.u.req),
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&error_abort);
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init.u.resp.tpm_result = 0;
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qio_channel_write(ioc, (char *)&init.u.resp, sizeof(init.u.resp),
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&error_abort);
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break;
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}
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case CMD_SHUTDOWN: {
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ptm_res res = 0;
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qio_channel_write(ioc, (char *)&res, sizeof(res), &error_abort);
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/* the tpm data thread is expected to finish now */
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g_thread_join(s->emu_tpm_thread);
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break;
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}
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case CMD_STOP: {
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ptm_res res = 0;
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qio_channel_write(ioc, (char *)&res, sizeof(res), &error_abort);
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break;
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}
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case CMD_SET_BUFFERSIZE: {
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ptm_setbuffersize sbs;
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qio_channel_read(ioc, (char *)&sbs.u.req, sizeof(sbs.u.req),
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&error_abort);
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sbs.u.resp.buffersize = sbs.u.req.buffersize ?: cpu_to_be32(4096);
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sbs.u.resp.tpm_result = 0;
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sbs.u.resp.minsize = cpu_to_be32(128);
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sbs.u.resp.maxsize = cpu_to_be32(4096);
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qio_channel_write(ioc, (char *)&sbs.u.resp, sizeof(sbs.u.resp),
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&error_abort);
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break;
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}
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case CMD_SET_LOCALITY: {
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ptm_loc loc;
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/* Note: this time it's not u.req / u.resp... */
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qio_channel_read(ioc, (char *)&loc, sizeof(loc), &error_abort);
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g_assert_cmpint(loc.u.req.loc, ==, 0);
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loc.u.resp.tpm_result = 0;
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qio_channel_write(ioc, (char *)&loc, sizeof(loc), &error_abort);
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break;
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}
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case CMD_GET_TPMESTABLISHED: {
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ptm_est est = {
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.u.resp.bit = 0,
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};
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qio_channel_write(ioc, (char *)&est, sizeof(est), &error_abort);
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break;
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}
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default:
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g_debug("unimplemented %u", cmd);
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g_assert_not_reached();
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}
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}
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object_unref(OBJECT(ioc));
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object_unref(OBJECT(lioc));
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return NULL;
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}
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