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/*
* QTest TPM utilities
*
* Copyright (c) 2018 IBM Corporation
* Copyright (c) 2018 Red Hat, Inc.
*
* Authors:
* Stefan Berger <stefanb@linux.vnet.ibm.com>
* 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 "hw/acpi/tpm.h"
#include "libqtest.h"
#include "tpm-util.h"
void tpm_util_crb_transfer(QTestState *s,
const unsigned char *req, size_t req_size,
unsigned char *rsp, size_t rsp_size)
{
uint64_t caddr = qtest_readq(s, TPM_CRB_ADDR_BASE + A_CRB_CTRL_CMD_LADDR);
uint64_t raddr = qtest_readq(s, TPM_CRB_ADDR_BASE + A_CRB_CTRL_RSP_ADDR);
qtest_writeb(s, TPM_CRB_ADDR_BASE + A_CRB_LOC_CTRL, 1);
qtest_memwrite(s, caddr, req, req_size);
uint32_t sts, start = 1;
uint64_t end_time = g_get_monotonic_time() + 5 * G_TIME_SPAN_SECOND;
qtest_writel(s, TPM_CRB_ADDR_BASE + A_CRB_CTRL_START, start);
while (true) {
start = qtest_readl(s, TPM_CRB_ADDR_BASE + A_CRB_CTRL_START);
if ((start & 1) == 0) {
break;
}
if (g_get_monotonic_time() >= end_time) {
break;
}
};
start = qtest_readl(s, TPM_CRB_ADDR_BASE + A_CRB_CTRL_START);
g_assert_cmpint(start & 1, ==, 0);
sts = qtest_readl(s, TPM_CRB_ADDR_BASE + A_CRB_CTRL_STS);
g_assert_cmpint(sts & 1, ==, 0);
qtest_memread(s, raddr, rsp, rsp_size);
}
void tpm_util_startup(QTestState *s, tx_func *tx)
{
unsigned char buffer[1024];
unsigned char tpm_startup[] =
"\x80\x01\x00\x00\x00\x0c\x00\x00\x01\x44\x00\x00";
unsigned char tpm_startup_resp[] =
"\x80\x01\x00\x00\x00\x0a\x00\x00\x00\x00";
tx(s, tpm_startup, sizeof(tpm_startup), buffer, sizeof(buffer));
g_assert_cmpmem(buffer, sizeof(tpm_startup_resp),
tpm_startup_resp, sizeof(tpm_startup_resp));
}
void tpm_util_pcrextend(QTestState *s, tx_func *tx)
{
unsigned char buffer[1024];
unsigned char tpm_pcrextend[] =
"\x80\x02\x00\x00\x00\x41\x00\x00\x01\x82\x00\x00\x00\x0a\x00\x00"
"\x00\x09\x40\x00\x00\x09\x00\x00\x00\x00\x00\x00\x00\x00\x01\x00"
"\x0b\x74\x65\x73\x74\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
"\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
"\x00";
unsigned char tpm_pcrextend_resp[] =
"\x80\x02\x00\x00\x00\x13\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
"\x01\x00\x00";
tx(s, tpm_pcrextend, sizeof(tpm_pcrextend), buffer, sizeof(buffer));
g_assert_cmpmem(buffer, sizeof(tpm_pcrextend_resp),
tpm_pcrextend_resp, sizeof(tpm_pcrextend_resp));
}
void tpm_util_pcrread(QTestState *s, tx_func *tx,
const unsigned char *exp_resp, size_t exp_resp_size)
{
unsigned char buffer[1024];
unsigned char tpm_pcrread[] =
"\x80\x01\x00\x00\x00\x14\x00\x00\x01\x7e\x00\x00\x00\x01\x00\x0b"
"\x03\x00\x04\x00";
tx(s, tpm_pcrread, sizeof(tpm_pcrread), buffer, sizeof(buffer));
g_assert_cmpmem(buffer, exp_resp_size, exp_resp, exp_resp_size);
}
static gboolean tpm_util_swtpm_has_tpm2(void)
{
gint mystdout;
gboolean succ;
unsigned i;
char buffer[10240];
ssize_t n;
gchar *swtpm_argv[] = {
g_strdup("swtpm"), g_strdup("socket"), g_strdup("--help"), NULL
};
succ = g_spawn_async_with_pipes(NULL, swtpm_argv, NULL,
G_SPAWN_SEARCH_PATH, NULL, NULL, NULL,
NULL, &mystdout, NULL, NULL);
if (!succ) {
goto cleanup;
}
n = read(mystdout, buffer, sizeof(buffer) - 1);
if (n < 0) {
goto cleanup;
}
buffer[n] = 0;
if (!strstr(buffer, "--tpm2")) {
succ = false;
}
cleanup:
for (i = 0; swtpm_argv[i]; i++) {
g_free(swtpm_argv[i]);
}
return succ;
}
gboolean tpm_util_swtpm_start(const char *path, GPid *pid,
SocketAddress **addr, GError **error)
{
char *swtpm_argv_tpmstate = g_strdup_printf("dir=%s", path);
char *swtpm_argv_ctrl = g_strdup_printf("type=unixio,path=%s/sock",
path);
gchar *swtpm_argv[] = {
g_strdup("swtpm"), g_strdup("socket"),
g_strdup("--tpmstate"), swtpm_argv_tpmstate,
g_strdup("--ctrl"), swtpm_argv_ctrl,
g_strdup("--tpm2"),
NULL
};
gboolean succ;
unsigned i;
succ = tpm_util_swtpm_has_tpm2();
if (!succ) {
goto cleanup;
}
*addr = g_new0(SocketAddress, 1);
(*addr)->type = SOCKET_ADDRESS_TYPE_UNIX;
(*addr)->u.q_unix.path = g_build_filename(path, "sock", NULL);
succ = g_spawn_async(NULL, swtpm_argv, NULL, G_SPAWN_SEARCH_PATH,
NULL, NULL, pid, error);
cleanup:
for (i = 0; swtpm_argv[i]; i++) {
g_free(swtpm_argv[i]);
}
return succ;
}
void tpm_util_swtpm_kill(GPid pid)
{
int n;
if (!pid) {
return;
}
g_spawn_close_pid(pid);
n = kill(pid, 0);
if (n < 0) {
return;
}
kill(pid, SIGKILL);
}
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