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/*
* Copyright (c) 2018 Red Hat Inc
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* * Redistributions of source code must retain the above
* copyright notice, this list of conditions and the
* following disclaimer.
* * 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.
* * The names of contributors to this software may not be
* used to endorse or promote products derived from this
* software without specific prior written permission.
*
* 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 OWNER 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.
*
* Author: Daiki Ueno
*/
#include "config.h"
#include "runtime.h"
#include "compat.h"
#include <stdio.h>
#include <string.h>
#ifdef OS_UNIX
#include <pwd.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <unistd.h>
static const char * const _p11_runtime_bases_default[] = { "/run", "/var/run", NULL };
const char * const *_p11_runtime_bases = _p11_runtime_bases_default;
#endif
CK_RV
p11_get_runtime_directory (char **directoryp)
{
const char *envvar;
char *directory;
#ifdef OS_UNIX
const char * const *bases = _p11_runtime_bases;
char prefix[13 + 1 + 20 + 6 + 1];
uid_t uid;
struct stat sb;
struct passwd pwbuf, *pw;
char buf[1024];
int i;
#endif
/* We can't always assume the XDG_RUNTIME_DIR envvar here,
* because the PKCS#11 module can be loaded by a program that
* calls setuid(). */
envvar = secure_getenv ("XDG_RUNTIME_DIR");
if (envvar != NULL && envvar[0] != '\0') {
directory = strdup (envvar);
if (!directory)
return CKR_HOST_MEMORY;
*directoryp = directory;
return CKR_OK;
}
#ifdef OS_UNIX
uid = getuid ();
for (i = 0; bases[i] != NULL; i++) {
snprintf (prefix, sizeof prefix, "%s/user/%u",
bases[i], (unsigned int) uid);
if (stat (prefix, &sb) != -1 && S_ISDIR (sb.st_mode)) {
directory = strdup (prefix);
if (!directory)
return CKR_HOST_MEMORY;
*directoryp = directory;
return CKR_OK;
}
}
#endif
/* We can't use /run/user/<UID>, fallback to ~/.cache. */
envvar = secure_getenv ("XDG_CACHE_HOME");
if (envvar != NULL && envvar[0] != '\0') {
directory = strdup (envvar);
if (!directory)
return CKR_HOST_MEMORY;
*directoryp = directory;
return CKR_OK;
}
#ifdef OS_UNIX
if (getpwuid_r (uid, &pwbuf, buf, sizeof buf, &pw) == 0 &&
pw != NULL && pw->pw_dir != NULL && *pw->pw_dir == '/') {
if (asprintf (&directory, "%s/.cache", pw->pw_dir) < 0)
return CKR_HOST_MEMORY;
*directoryp = directory;
return CKR_OK;
}
#endif
return CKR_GENERAL_ERROR;
}
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