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qemu/tests/qtest/tpm-util.c
Thomas Huth daa8bb57db tests/qtest/tpm: Clean up remainders of swtpm 
After running "make check", there are remainders of the tpm
tests left in the /tmp directory, slowly filling it up.
Seems like "swtpm" leaves a ".lock" and a "tpm2-00.permall"
file behind, so that the g_rmdir() calls on the temporary
directories fail. Introduce a helper function to remove those
leftovers before doing the g_rmdir().

Message-Id: <20221012084334.794253-1-thuth@redhat.com>
Reviewed-by: Stefan Berger <stefanb@linux.ibm.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
2022-10-28 09:39:21 +02:00

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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 <glib/gstdio.h>
#include "hw/acpi/tpm.h"
#include "libqtest.h"
#include "tpm-util.h"
#include "qapi/qmp/qdict.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_tis_transfer(QTestState *s,
const unsigned char *req, size_t req_size,
unsigned char *rsp, size_t rsp_size)
{
uint32_t sts;
uint16_t bcount;
size_t i;
/* request use of locality 0 */
qtest_writeb(s, TIS_REG(0, TPM_TIS_REG_ACCESS), TPM_TIS_ACCESS_REQUEST_USE);
qtest_writel(s, TIS_REG(0, TPM_TIS_REG_STS), TPM_TIS_STS_COMMAND_READY);
sts = qtest_readl(s, TIS_REG(0, TPM_TIS_REG_STS));
bcount = (sts >> 8) & 0xffff;
g_assert_cmpint(bcount, >=, req_size);
/* transmit command */
for (i = 0; i < req_size; i++) {
qtest_writeb(s, TIS_REG(0, TPM_TIS_REG_DATA_FIFO), req[i]);
}
/* start processing */
qtest_writeb(s, TIS_REG(0, TPM_TIS_REG_STS), TPM_TIS_STS_TPM_GO);
uint64_t end_time = g_get_monotonic_time() + 50 * G_TIME_SPAN_SECOND;
do {
sts = qtest_readl(s, TIS_REG(0, TPM_TIS_REG_STS));
if ((sts & TPM_TIS_STS_DATA_AVAILABLE) != 0) {
break;
}
} while (g_get_monotonic_time() < end_time);
sts = qtest_readl(s, TIS_REG(0, TPM_TIS_REG_STS));
bcount = (sts >> 8) & 0xffff;
memset(rsp, 0, rsp_size);
for (i = 0; i < bcount; i++) {
rsp[i] = qtest_readb(s, TIS_REG(0, TPM_TIS_REG_DATA_FIFO));
}
/* relinquish use of locality 0 */
qtest_writeb(s, TIS_REG(0, TPM_TIS_REG_ACCESS),
TPM_TIS_ACCESS_ACTIVE_LOCALITY);
}
void tpm_util_startup(QTestState *s, tx_func *tx)
{
unsigned char buffer[1024];
static const unsigned char tpm_startup[] =
"\x80\x01\x00\x00\x00\x0c\x00\x00\x01\x44\x00\x00";
static const 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];
static const 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";
static const 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];
static const 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));
/* skip pcrUpdateCounter (14th byte) in comparison */
g_assert(exp_resp_size >= 15);
g_assert_cmpmem(buffer, 13, exp_resp, 13);
g_assert_cmpmem(&buffer[14], exp_resp_size - 14,
&exp_resp[14], exp_resp_size - 14);
}
bool tpm_util_swtpm_has_tpm2(void)
{
bool has_tpm2 = false;
char *out = NULL;
static const char *argv[] = {
"swtpm", "socket", "--help", NULL
};
if (!g_spawn_sync(NULL /* working_dir */,
(char **)argv,
NULL /* envp */,
G_SPAWN_SEARCH_PATH,
NULL /* child_setup */,
NULL /* user_data */,
&out,
NULL /* err */,
NULL /* exit_status */,
NULL)) {
return false;
}
if (strstr(out, "--tpm2")) {
has_tpm2 = true;
}
g_free(out);
return has_tpm2;
}
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;
*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);
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);
}
void tpm_util_migrate(QTestState *who, const char *uri)
{
QDict *rsp;
rsp = qtest_qmp(who,
"{ 'execute': 'migrate', 'arguments': { 'uri': %s } }",
uri);
g_assert(qdict_haskey(rsp, "return"));
qobject_unref(rsp);
}
void tpm_util_wait_for_migration_complete(QTestState *who)
{
while (true) {
QDict *rsp;
QDict *rsp_return;
bool completed;
const char *status;
rsp = qtest_qmp(who, "{ 'execute': 'query-migrate' }");
g_assert(qdict_haskey(rsp, "return"));
rsp_return = qdict_get_qdict(rsp, "return");
g_assert(!qdict_haskey(rsp_return, "error"));
status = qdict_get_str(rsp_return, "status");
completed = strcmp(status, "completed") == 0;
g_assert_cmpstr(status, !=, "failed");
qobject_unref(rsp);
if (completed) {
return;
}
usleep(1000);
}
}
void tpm_util_migration_start_qemu(QTestState **src_qemu,
QTestState **dst_qemu,
SocketAddress *src_tpm_addr,
SocketAddress *dst_tpm_addr,
const char *miguri,
const char *ifmodel,
const char *machine_options)
{
char *src_qemu_args, *dst_qemu_args;
src_qemu_args = g_strdup_printf(
"%s "
"-chardev socket,id=chr,path=%s "
"-tpmdev emulator,id=dev,chardev=chr "
"-device %s,tpmdev=dev ",
machine_options ? : "", src_tpm_addr->u.q_unix.path, ifmodel);
*src_qemu = qtest_init(src_qemu_args);
dst_qemu_args = g_strdup_printf(
"%s "
"-chardev socket,id=chr,path=%s "
"-tpmdev emulator,id=dev,chardev=chr "
"-device %s,tpmdev=dev "
"-incoming %s",
machine_options ? : "",
dst_tpm_addr->u.q_unix.path,
ifmodel, miguri);
*dst_qemu = qtest_init(dst_qemu_args);
g_free(src_qemu_args);
g_free(dst_qemu_args);
}
/* Remove directory with remainders of swtpm */
void tpm_util_rmdir(const char *path)
{
char *filename;
int ret;
filename = g_strdup_printf("%s/tpm2-00.permall", path);
g_unlink(filename);
g_free(filename);
filename = g_strdup_printf("%s/.lock", path);
g_unlink(filename);
g_free(filename);
ret = g_rmdir(path);
g_assert(!ret);
}
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