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