/*
* Licensed Materials - Property of IBM
*
* trousers - An open source TCG Software Stack
*
* (C) Copyright International Business Machines Corp. 2004-2006
*
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <errno.h>
#include <pwd.h>
#include <sys/types.h>
#include <sys/file.h>
#include <sys/stat.h>
#include <assert.h>
#include <fcntl.h>
#include <limits.h>
#include <netdb.h>
#if defined (HAVE_BYTEORDER_H)
#include <sys/byteorder.h>
#elif defined (HTOLE_DEFINED)
#ifndef __APPLE__
#include <endian.h>
#else
#include "portable_endian.h"
#endif
#define LE_16 htole16
#define LE_32 htole32
#define LE_64 htole64
#else
#define LE_16(x) (x)
#define LE_32(x) (x)
#define LE_64(x) (x)
#endif
#include "trousers/tss.h"
#include "trousers/trousers.h"
#include "trousers_types.h"
#include "tcs_tsp.h"
#include "spi_utils.h"
#include "tspps.h"
#include "tsplog.h"
static int user_ps_fd = -1;
static MUTEX_DECLARE_INIT(user_ps_lock);
#if (defined (__FreeBSD__) || defined (__OpenBSD__) || defined(__NetBSD__))
static MUTEX_DECLARE_INIT(user_ps_path);
#endif
static struct flock fl;
/*
* Determine the default path to the persistent storage file and create it if it doesn't exist.
*/
TSS_RESULT
get_user_ps_path(char **file)
{
TSS_RESULT result;
char *file_name = NULL, *home_dir = NULL;
struct passwd *pwp;
#if (defined (__linux) || defined (linux) || defined(__GLIBC__))
struct passwd pw;
#endif
struct stat stat_buf;
char buf[PASSWD_BUFSIZE];
uid_t euid;
int rc;
if ((file_name = getenv("TSS_USER_PS_FILE"))) {
*file = strdup(file_name);
return (*file) ? TSS_SUCCESS : TSPERR(TSS_E_OUTOFMEMORY);
}
#if (defined (__FreeBSD__) || defined (__OpenBSD__) || defined(__NetBSD__))
MUTEX_LOCK(user_ps_path);
#endif
euid = geteuid();
#if defined (SOLARIS)
/*
* Solaris keeps user PS in a local directory instead of
* in the user's home directory, which may be shared
* by multiple systems.
*
* The directory path on Solaris is /var/tpm/userps/[EUID]/
*/
rc = snprintf(buf, sizeof (buf), "%s/%d", TSS_USER_PS_DIR, euid);
#else
setpwent();
while (1) {
#if (defined (__linux) || defined (linux) || defined(__GLIBC__))
rc = getpwent_r(&pw, buf, PASSWD_BUFSIZE, &pwp);
if (rc) {
LogDebugFn("USER PS: Error getting path to home directory: getpwent_r: %s",
strerror(rc));
endpwent();
return TSPERR(TSS_E_INTERNAL_ERROR);
}
#elif (defined (__FreeBSD__) || defined (__OpenBSD__) || defined(__NetBSD__))
if ((pwp = getpwent()) == NULL) {
LogDebugFn("USER PS: Error getting path to home directory: getpwent: %s",
strerror(rc));
endpwent();
MUTEX_UNLOCK(user_ps_path);
return TSPERR(TSS_E_INTERNAL_ERROR);
}
#endif
if (euid == pwp->pw_uid) {
home_dir = strdup(pwp->pw_dir);
break;
}
}
endpwent();
if (!home_dir)
return TSPERR(TSS_E_OUTOFMEMORY);
/* Tack on TSS_USER_PS_DIR and see if it exists */
rc = snprintf(buf, sizeof (buf), "%s/%s", home_dir, TSS_USER_PS_DIR);
#endif /* SOLARIS */
if (rc == sizeof (buf)) {
LogDebugFn("USER PS: Path to file too long! (> %d bytes)", PASSWD_BUFSIZE);
result = TSPERR(TSS_E_INTERNAL_ERROR);
goto done;
}
errno = 0;
if ((rc = stat(buf, &stat_buf)) == -1) {
if (errno == ENOENT) {
errno = 0;
/* Create the user's ps directory if it is not there. */
if ((rc = mkdir(buf, 0700)) == -1) {
LogDebugFn("USER PS: Error creating dir: %s: %s", buf,
strerror(errno));
result = TSPERR(TSS_E_INTERNAL_ERROR);
goto done;
}
} else {
LogDebugFn("USER PS: Error stating dir: %s: %s", buf, strerror(errno));
result = TSPERR(TSS_E_INTERNAL_ERROR);
goto done;
}
}
/* Directory exists or has been created, return the path to the file */
#if defined (SOLARIS)
rc = snprintf(buf, sizeof (buf), "%s/%d/%s", TSS_USER_PS_DIR, euid,
TSS_USER_PS_FILE);
#else
rc = snprintf(buf, sizeof (buf), "%s/%s/%s", home_dir, TSS_USER_PS_DIR,
TSS_USER_PS_FILE);
#endif
if (rc == sizeof (buf)) {
LogDebugFn("USER PS: Path to file too long! (> %zd bytes)", sizeof (buf));
} else
*file = strdup(buf);
result = (*file) ? TSS_SUCCESS : TSPERR(TSS_E_OUTOFMEMORY);
done:
free(home_dir);
return result;
}
TSS_RESULT
get_file(int *fd)
{
TSS_RESULT result;
int rc = 0;
char *file_name = NULL;
MUTEX_LOCK(user_ps_lock);
/* check the global file handle first. If it exists, lock it and return */
if (user_ps_fd != -1) {
fl.l_type = F_WRLCK;
if ((rc = fcntl(user_ps_fd, F_SETLKW, &fl))) {
LogDebug("USER PS: failed to lock file: %s", strerror(errno));
MUTEX_UNLOCK(user_ps_lock);
return TSPERR(TSS_E_INTERNAL_ERROR);
}
*fd = user_ps_fd;
return TSS_SUCCESS;
}
/* open and lock the file */
if ((result = get_user_ps_path(&file_name))) {
LogDebugFn("USER PS: error getting file path");
MUTEX_UNLOCK(user_ps_lock);
return result;
}
user_ps_fd = open(file_name, O_CREAT|O_RDWR, 0600);
if (user_ps_fd < 0) {
LogDebug("USER PS: open of %s failed: %s", file_name, strerror(errno));
free(file_name);
MUTEX_UNLOCK(user_ps_lock);
return TSPERR(TSS_E_INTERNAL_ERROR);
}
fl.l_type = F_WRLCK;
if ((rc = fcntl(user_ps_fd, F_SETLKW, &fl))) {
LogDebug("USER PS: failed to get lock of %s: %s", file_name, strerror(errno));
free(file_name);
close(user_ps_fd);
user_ps_fd = -1;
MUTEX_UNLOCK(user_ps_lock);
return TSPERR(TSS_E_INTERNAL_ERROR);
}
*fd = user_ps_fd;
free(file_name);
return TSS_SUCCESS;
}
int
put_file(int fd)
{
int rc = 0;
fsync(fd);
/* release the file lock */
fl.l_type = F_UNLCK;
if ((rc = fcntl(fd, F_SETLKW, &fl))) {
LogDebug("USER PS: failed to unlock file: %s", strerror(errno));
rc = -1;
}
MUTEX_UNLOCK(user_ps_lock);
return rc;
}
void
psfile_close(int fd)
{
close(fd);
user_ps_fd = -1;
MUTEX_UNLOCK(user_ps_lock);
}
TSS_RESULT
psfile_is_key_registered(int fd, TSS_UUID *uuid, TSS_BOOL *answer)
{
TSS_RESULT result;
struct key_disk_cache tmp;
if ((result = psfile_get_cache_entry_by_uuid(fd, uuid, &tmp)) == TSS_SUCCESS)
*answer = TRUE;
else if (result == (TSS_E_PS_KEY_NOTFOUND | TSS_LAYER_TSP))
*answer = FALSE;
else
return result;
return TSS_SUCCESS;
}
TSS_RESULT
psfile_get_parent_uuid_by_uuid(int fd, TSS_UUID *uuid, TSS_UUID *ret_uuid)
{
TSS_RESULT result;
struct key_disk_cache tmp;
if ((result = psfile_get_cache_entry_by_uuid(fd, uuid, &tmp)))
return result;
memcpy(ret_uuid, &tmp.parent_uuid, sizeof(TSS_UUID));
return TSS_SUCCESS;
}
TSS_RESULT
psfile_get_parent_ps_type(int fd, TSS_UUID *uuid, UINT32 *type)
{
TSS_RESULT result;
struct key_disk_cache tmp;
if ((result = psfile_get_cache_entry_by_uuid(fd, uuid, &tmp)))
return result;
if (tmp.flags & CACHE_FLAG_PARENT_PS_SYSTEM)
*type = TSS_PS_TYPE_SYSTEM;
else
*type = TSS_PS_TYPE_USER;
return TSS_SUCCESS;
}
/*
* return a key struct from PS given a uuid
*/
TSS_RESULT
psfile_get_key_by_uuid(int fd, TSS_UUID *uuid, BYTE *key)
{
int rc;
TSS_RESULT result;
off_t file_offset;
struct key_disk_cache tmp;
BYTE buf[4096];
if ((result = psfile_get_cache_entry_by_uuid(fd, uuid, &tmp)))
return result;
/* jump to the location of the key blob */
file_offset = TSSPS_BLOB_DATA_OFFSET(&tmp);
rc = lseek(fd, file_offset, SEEK_SET);
if (rc == ((off_t)-1)) {
LogDebugFn("lseek: %s", strerror(errno));
return TSPERR(TSS_E_INTERNAL_ERROR);
}
if (tmp.blob_size > 4096) {
LogError("Blob size greater than 4096! Size: %d",
tmp.blob_size);
return TSPERR(TSS_E_INTERNAL_ERROR);
}
if ((rc = read_data(fd, buf, tmp.blob_size))) {
LogDebugFn("Blob read from disk failed.");
return rc;
}
memcpy(key, buf, tmp.blob_size);
return TSS_SUCCESS;
}
/*
* return a key struct from PS given a public key
*/
TSS_RESULT
psfile_get_key_by_pub(int fd, TSS_UUID *uuid, UINT32 pub_size, BYTE *pub, BYTE *key)
{
int rc;
TSS_RESULT result;
off_t file_offset;
struct key_disk_cache tmp;
BYTE buf[4096];
if ((result = psfile_get_cache_entry_by_pub(fd, pub_size, pub, &tmp)))
return result;
/* jump to the location of the key blob */
file_offset = TSSPS_BLOB_DATA_OFFSET(&tmp);
rc = lseek(fd, file_offset, SEEK_SET);
if (rc == ((off_t)-1)) {
LogDebugFn("lseek: %s", strerror(errno));
return TSPERR(TSS_E_INTERNAL_ERROR);
}
if (tmp.blob_size > 4096) {
LogError("Blob size greater than 4096! Size: %d",
tmp.blob_size);
return TSPERR(TSS_E_INTERNAL_ERROR);
}
if ((result = read_data(fd, buf, tmp.blob_size))) {
LogDebugFn("Blob read from disk failed.");
return result;
}
memcpy(key, buf, tmp.blob_size);
memcpy(uuid, &tmp.uuid, sizeof(TSS_UUID));
return TSS_SUCCESS;
}
TSS_RESULT
psfile_get_uuid_by_pub(int fd, UINT32 pub_size, BYTE *pub, TSS_UUID *uuid)
{
TSS_RESULT result;
struct key_disk_cache tmp;
if ((result = psfile_get_cache_entry_by_pub(fd, pub_size, pub, &tmp)))
return result;
memcpy(uuid, &tmp.uuid, sizeof(TSS_UUID));
return TSS_SUCCESS;
}
TSS_RESULT
psfile_change_num_keys(int fd, BYTE increment)
{
int rc;
TSS_RESULT result;
UINT32 num_keys;
rc = lseek(fd, TSSPS_NUM_KEYS_OFFSET, SEEK_SET);
if (rc == ((off_t)-1)) {
LogDebug("lseek: %s", strerror(errno));
return TSPERR(TSS_E_INTERNAL_ERROR);
}
rc = read(fd, &num_keys, sizeof(UINT32));
if (rc != sizeof(UINT32)) {
LogDebug("read of %zd bytes: %s", sizeof(UINT32), strerror(errno));
return TSPERR(TSS_E_INTERNAL_ERROR);
}
num_keys = LE_32(num_keys);
if (increment)
num_keys++;
else
num_keys--;
rc = lseek(fd, TSSPS_NUM_KEYS_OFFSET, SEEK_SET);
if (rc == ((off_t)-1)) {
LogDebug("lseek: %s", strerror(errno));
return TSPERR(TSS_E_INTERNAL_ERROR);
}
num_keys = LE_32(num_keys);
if ((result = write_data(fd, (void *)&num_keys, sizeof(UINT32)))) {
LogDebug("%s", __FUNCTION__);
return result;
}
return TSS_SUCCESS;
}
/* Write the initial header (number of keys and PS version) to initialize a new file */
TSS_RESULT
psfile_write_key_header(int fd)
{
int rc;
TSS_RESULT result;
UINT32 i;
rc = lseek(fd, TSSPS_VERSION_OFFSET, SEEK_SET);
if (rc == ((off_t)-1)) {
LogDebug("lseek: %s", strerror(errno));
return TSPERR(TSS_E_INTERNAL_ERROR);
}
i = TSSPS_VERSION;
if ((result = write_data(fd, &i, sizeof(BYTE)))) {
LogDebug("%s", __FUNCTION__);
return result;
}
rc = lseek(fd, TSSPS_NUM_KEYS_OFFSET, SEEK_SET);
if (rc == ((off_t)-1)) {
LogDebug("lseek: %s", strerror(errno));
return TSPERR(TSS_E_INTERNAL_ERROR);
}
i = 0;
if ((result = write_data(fd, &i, sizeof(UINT32)))) {
LogDebug("%s", __FUNCTION__);
return result;
}
return TSS_SUCCESS;
}
/*
* disk store format:
*
* TrouSerS 0.2.1+
* Version 1: cached?
* [BYTE PS version = '\1']
* [UINT32 num_keys_on_disk ]
* [TSS_UUID uuid0 ] yes
* [TSS_UUID uuid_parent0 ] yes
* [UINT16 pub_data_size0 ] yes
* [UINT16 blob_size0 ] yes
* [UINT32 vendor_data_size0] yes
* [UINT16 cache_flags0 ] yes
* [BYTE[] pub_data0 ]
* [BYTE[] blob0 ]
* [BYTE[] vendor_data0 ]
* [...]
*
*/
TSS_RESULT
psfile_write_key(int fd,
TSS_UUID *uuid,
TSS_UUID *parent_uuid,
UINT32 parent_ps,
BYTE *key_blob,
UINT16 key_blob_size)
{
TSS_RESULT result;
TSS_KEY key;
UINT32 zero = 0;
UINT64 offset;
UINT16 pub_key_size, cache_flags = 0;
struct stat stat_buf;
int rc, file_offset;
/* leaving the cache flag for parent ps type as 0 implies TSS_PS_TYPE_USER */
if (parent_ps == TSS_PS_TYPE_SYSTEM)
cache_flags |= CACHE_FLAG_PARENT_PS_SYSTEM;
if ((rc = fstat(fd, &stat_buf)) == -1) {
LogDebugFn("stat failed: %s", strerror(errno));
return TSPERR(TSS_E_INTERNAL_ERROR);
}
file_offset = stat_buf.st_size;
if (file_offset < (int)TSSPS_KEYS_OFFSET) {
if ((result = psfile_write_key_header(fd)))
return result;
file_offset = TSSPS_KEYS_OFFSET;
}
rc = lseek(fd, file_offset, SEEK_SET);
if (rc == ((off_t)-1)) {
LogDebug("lseek: %s", strerror(errno));
return TSPERR(TSS_E_INTERNAL_ERROR);
}
/* Unload the blob to get the public key */
offset = 0;
if ((result = UnloadBlob_TSS_KEY(&offset, key_blob, &key)))
return result;
pub_key_size = key.pubKey.keyLength;
/* [TSS_UUID uuid0 ] yes */
if ((result = write_data(fd, (void *)uuid, sizeof(TSS_UUID)))) {
LogDebug("%s", __FUNCTION__);
goto done;
}
/* [TSS_UUID uuid_parent0 ] yes */
if ((result = write_data(fd, (void *)parent_uuid, sizeof(TSS_UUID)))) {
LogDebug("%s", __FUNCTION__);
goto done;
}
/* [UINT16 pub_data_size0 ] yes */
pub_key_size = LE_16(pub_key_size);
if ((result = write_data(fd, &pub_key_size, sizeof(UINT16)))) {
LogDebug("%s", __FUNCTION__);
goto done;
}
pub_key_size = LE_16(pub_key_size);
/* [UINT16 blob_size0 ] yes */
key_blob_size = LE_16(key_blob_size);
if ((result = write_data(fd, &key_blob_size, sizeof(UINT16)))) {
LogDebug("%s", __FUNCTION__);
goto done;
}
key_blob_size = LE_16(key_blob_size);
/* [UINT32 vendor_data_size0 ] yes */
if ((result = write_data(fd, &zero, sizeof(UINT32)))) {
LogDebug("%s", __FUNCTION__);
goto done;
}
/* [UINT16 cache_flags0 ] yes */
cache_flags = LE_16(cache_flags);
if ((result = write_data(fd, &cache_flags, sizeof(UINT16)))) {
LogDebug("%s", __FUNCTION__);
goto done;
}
cache_flags = LE_16(cache_flags);
/* [BYTE[] pub_data0 ] no */
if ((result = write_data(fd, (void *)key.pubKey.key, pub_key_size))) {
LogDebug("%s", __FUNCTION__);
goto done;
}
/* [BYTE[] blob0 ] no */
if ((result = write_data(fd, (void *)key_blob, key_blob_size))) {
LogDebug("%s", __FUNCTION__);
goto done;
}
if ((result = psfile_change_num_keys(fd, TSS_PSFILE_INCREMENT_NUM_KEYS))) {
LogDebug("%s", __FUNCTION__);
goto done;
}
done:
free_key_refs(&key);
return result;
}
TSS_RESULT
psfile_remove_key(int fd, TSS_UUID *uuid)
{
TSS_RESULT result;
UINT32 head_offset = 0, tail_offset;
int rc, size = 0;
struct key_disk_cache c;
BYTE buf[4096];
if ((result = psfile_get_cache_entry_by_uuid(fd, uuid, &c)))
return result;
/* head_offset is the offset the beginning of the key */
head_offset = TSSPS_UUID_OFFSET(&c);
/* tail_offset is the offset the beginning of the next key */
tail_offset = TSSPS_VENDOR_DATA_OFFSET(&c) + c.vendor_data_size;
rc = lseek(fd, tail_offset, SEEK_SET);
if (rc == ((off_t)-1)) {
LogDebug("lseek: %s", strerror(errno));
return TSPERR(TSS_E_INTERNAL_ERROR);
}
/* read in from tail, write out to head to fill the gap */
while ((rc = read(fd, buf, sizeof(buf))) > 0) {
size = rc;
tail_offset += size;
/* set the file pointer to where we want to write */
rc = lseek(fd, head_offset, SEEK_SET);
if (rc == ((off_t)-1)) {
LogDebug("lseek: %s", strerror(errno));
return TSPERR(TSS_E_INTERNAL_ERROR);
}
/* write the data */
if ((result = write_data(fd, (void *)buf, size))) {
LogDebug("%s", __FUNCTION__);
return result;
}
head_offset += size;
/* set the file pointer to where we want to read in the next
* loop */
rc = lseek(fd, tail_offset, SEEK_SET);
if (rc == ((off_t)-1)) {
LogDebug("lseek: %s", strerror(errno));
return TSPERR(TSS_E_INTERNAL_ERROR);
}
}
if (rc < 0) {
LogDebug("read: %s", strerror(errno));
return TSPERR(TSS_E_INTERNAL_ERROR);
}
/* set the file pointer to where we want to write */
rc = lseek(fd, head_offset, SEEK_SET);
if (rc == ((off_t)-1)) {
LogDebug("lseek: %s", strerror(errno));
return TSPERR(TSS_E_INTERNAL_ERROR);
}
/* head_offset now contains a pointer to where we want to truncate the
* file. Zero out the old tail end of the file and truncate it. */
__tspi_memset(buf, 0, sizeof(buf));
/* Zero out the old tail end of the file */
if ((result = write_data(fd, (void *)buf, tail_offset - head_offset))) {
LogDebug("%s", __FUNCTION__);
return result;
}
if ((rc = ftruncate(fd, head_offset)) < 0) {
LogDebug("ftruncate: %s", strerror(errno));
return TSPERR(TSS_E_INTERNAL_ERROR);
}
/* we succeeded in removing a key from the disk. Decrement the number
* of keys in the file */
if ((result = psfile_change_num_keys(fd, TSS_PSFILE_DECREMENT_NUM_KEYS)))
return result;
return TSS_SUCCESS;
}
TSS_RESULT
psfile_get_all_cache_entries(int fd, UINT32 *size, struct key_disk_cache **c)
{
UINT32 i, num_keys = psfile_get_num_keys(fd);
int offset;
TSS_RESULT result;
struct key_disk_cache *tmp = NULL;
if (num_keys == 0) {
*size = 0;
*c = NULL;
return TSS_SUCCESS;
}
/* make sure the file pointer is where we expect, just after the number
* of keys on disk at the head of the file
*/
offset = lseek(fd, TSSPS_KEYS_OFFSET, SEEK_SET);
if (offset == ((off_t)-1)) {
LogDebug("lseek: %s", strerror(errno));
return TSPERR(TSS_E_INTERNAL_ERROR);
}
if ((tmp = malloc(num_keys * sizeof(struct key_disk_cache))) == NULL) {
LogDebug("malloc of %zu bytes failed.", num_keys * sizeof(struct key_disk_cache));
return TSPERR(TSS_E_OUTOFMEMORY);
}
for (i = 0; i < num_keys; i++) {
offset = lseek(fd, 0, SEEK_CUR);
if (offset == ((off_t)-1)) {
LogDebug("lseek: %s", strerror(errno));
result = TSPERR(TSS_E_INTERNAL_ERROR);
goto err_exit;
}
tmp[i].offset = offset;
/* read UUID */
if ((result = read_data(fd, &tmp[i].uuid, sizeof(TSS_UUID)))) {
LogDebug("%s", __FUNCTION__);
goto err_exit;
}
/* read parent UUID */
if ((result = read_data(fd, &tmp[i].parent_uuid, sizeof(TSS_UUID)))) {
LogDebug("%s", __FUNCTION__);
goto err_exit;
}
/* pub data size */
if ((result = read_data(fd, &tmp[i].pub_data_size, sizeof(UINT16)))) {
LogDebug("%s", __FUNCTION__);
goto err_exit;
}
tmp[i].pub_data_size = LE_16(tmp[i].pub_data_size);
DBG_ASSERT(tmp[i].pub_data_size <= 2048);
/* blob size */
if ((result = read_data(fd, &tmp[i].blob_size, sizeof(UINT16)))) {
LogDebug("%s", __FUNCTION__);
goto err_exit;
}
tmp[i].blob_size = LE_16(tmp[i].blob_size);
DBG_ASSERT(tmp[i].blob_size <= 4096);
/* vendor data size */
if ((result = read_data(fd, &tmp[i].vendor_data_size, sizeof(UINT32)))) {
LogDebug("%s", __FUNCTION__);
goto err_exit;
}
tmp[i].vendor_data_size = LE_32(tmp[i].vendor_data_size);
/* cache flags */
if ((result = read_data(fd, &tmp[i].flags, sizeof(UINT16)))) {
LogDebug("%s", __FUNCTION__);
goto err_exit;
}
tmp[i].flags = LE_16(tmp[i].flags);
/* fast forward over the pub key */
offset = lseek(fd, tmp[i].pub_data_size, SEEK_CUR);
if (offset == ((off_t)-1)) {
LogDebug("lseek: %s", strerror(errno));
result = TSPERR(TSS_E_INTERNAL_ERROR);
goto err_exit;
}
/* fast forward over the blob */
offset = lseek(fd, tmp[i].blob_size, SEEK_CUR);
if (offset == ((off_t)-1)) {
LogDebug("lseek: %s", strerror(errno));
result = TSPERR(TSS_E_INTERNAL_ERROR);
goto err_exit;
}
/* ignore vendor data for user ps */
}
*size = num_keys;
*c = tmp;
return TSS_SUCCESS;
err_exit:
free(tmp);
return result;
}
TSS_RESULT
copy_key_info(int fd, TSS_KM_KEYINFO *ki, struct key_disk_cache *c)
{
TSS_KEY key;
BYTE blob[4096];
UINT64 offset;
TSS_RESULT result;
off_t off;
/* Set the file pointer to the offset that the key blob is at */
off = lseek(fd, TSSPS_BLOB_DATA_OFFSET(c), SEEK_SET);
if (off == ((off_t)-1)) {
LogDebug("lseek: %s", strerror(errno));
return TSPERR(TSS_E_INTERNAL_ERROR);
}
/* Read in the key blob */
if ((result = read_data(fd, (void *)blob, c->blob_size))) {
LogDebug("%s", __FUNCTION__);
return result;
}
/* Expand the blob into a useable form */
offset = 0;
if ((result = UnloadBlob_TSS_KEY(&offset, blob, &key)))
return result;
if (key.hdr.key12.tag == TPM_TAG_KEY12) {
ki->versionInfo.bMajor = TSS_SPEC_MAJOR;
ki->versionInfo.bMinor = TSS_SPEC_MINOR;
ki->versionInfo.bRevMajor = 0;
ki->versionInfo.bRevMinor = 0;
} else
memcpy(&ki->versionInfo, &key.hdr.key11.ver, sizeof(TSS_VERSION));
memcpy(&ki->keyUUID, &c->uuid, sizeof(TSS_UUID));
memcpy(&ki->parentKeyUUID, &c->parent_uuid, sizeof(TSS_UUID));
ki->bAuthDataUsage = key.authDataUsage;
free_key_refs(&key);
return TSS_SUCCESS;
}
TSS_RESULT
copy_key_info2(int fd, TSS_KM_KEYINFO2 *ki, struct key_disk_cache *c)
{
TSS_KEY key;
BYTE blob[4096];
UINT64 offset;
TSS_RESULT result;
off_t off;
/* Set the file pointer to the offset that the key blob is at */
off = lseek(fd, TSSPS_BLOB_DATA_OFFSET(c), SEEK_SET);
if (off == ((off_t)-1)) {
LogDebug("lseek: %s", strerror(errno));
return TSPERR(TSS_E_INTERNAL_ERROR);
}
/* Read in the key blob */
if ((result = read_data(fd, (void *)blob, c->blob_size))) {
LogDebug("%s", __FUNCTION__);
return result;
}
/* Expand the blob into a useable form */
offset = 0;
if ((result = UnloadBlob_TSS_KEY(&offset, blob, &key)))
return result;
if (key.hdr.key12.tag == TPM_TAG_KEY12) {
ki->versionInfo.bMajor = TSS_SPEC_MAJOR;
ki->versionInfo.bMinor = TSS_SPEC_MINOR;
ki->versionInfo.bRevMajor = 0;
ki->versionInfo.bRevMinor = 0;
} else
memcpy(&ki->versionInfo, &key.hdr.key11.ver, sizeof(TSS_VERSION));
memcpy(&ki->keyUUID, &c->uuid, sizeof(TSS_UUID));
memcpy(&ki->parentKeyUUID, &c->parent_uuid, sizeof(TSS_UUID));
/* CHECK: fill the two new fields of TSS_KM_KEYINFO2 */
ki->persistentStorageType = TSS_PS_TYPE_USER;
ki->persistentStorageTypeParent = c->flags & CACHE_FLAG_PARENT_PS_SYSTEM ?
TSS_PS_TYPE_SYSTEM : TSS_PS_TYPE_USER;
ki->bAuthDataUsage = key.authDataUsage;
free_key_refs(&key);
return TSS_SUCCESS;
}
TSS_RESULT
psfile_get_registered_keys(int fd,
TSS_UUID *uuid,
TSS_UUID *tcs_uuid,
UINT32 *size,
TSS_KM_KEYINFO **keys)
{
TSS_RESULT result;
struct key_disk_cache *cache_entries;
UINT32 cache_size, i, j;
TSS_KM_KEYINFO *keyinfos = NULL;
TSS_UUID *find_uuid;
if ((result = psfile_get_all_cache_entries(fd, &cache_size, &cache_entries)))
return result;
if (cache_size == 0) {
if (uuid)
return TSPERR(TSS_E_PS_KEY_NOTFOUND);
else {
*size = 0;
*keys = NULL;
return TSS_SUCCESS;
}
}
if (uuid) {
find_uuid = uuid;
j = 0;
restart_search:
/* Search for the requested UUID. When found, allocate new space for it, copy
* it in, then change the uuid to be searched for it its parent and start over. */
for (i = 0; i < cache_size; i++) {
if (!memcmp(&cache_entries[i].uuid, find_uuid, sizeof(TSS_UUID))) {
if (!(keyinfos = realloc(keyinfos,
(j+1) * sizeof(TSS_KM_KEYINFO)))) {
free(cache_entries);
free(keyinfos);
return TSPERR(TSS_E_OUTOFMEMORY);
}
__tspi_memset(&keyinfos[j], 0, sizeof(TSS_KM_KEYINFO));
if ((result = copy_key_info(fd, &keyinfos[j], &cache_entries[i]))) {
free(cache_entries);
free(keyinfos);
return result;
}
find_uuid = &keyinfos[j].parentKeyUUID;
j++;
goto restart_search;
}
}
/* Searching for keys in the user PS will always lead us up to some key in the
* system PS. Return that key's uuid so that the upper layers can call down to TCS
* to search for it. */
memcpy(tcs_uuid, find_uuid, sizeof(TSS_UUID));
*size = j;
} else {
if ((keyinfos = calloc(cache_size, sizeof(TSS_KM_KEYINFO))) == NULL) {
LogDebug("malloc of %zu bytes failed.",
cache_size * sizeof(TSS_KM_KEYINFO));
free(cache_entries);
return TSPERR(TSS_E_OUTOFMEMORY);
}
for (i = 0; i < cache_size; i++) {
if ((result = copy_key_info(fd, &keyinfos[i], &cache_entries[i]))) {
free(cache_entries);
free(keyinfos);
return result;
}
}
*size = cache_size;
}
free(cache_entries);
*keys = keyinfos;
return TSS_SUCCESS;
}
TSS_RESULT
psfile_get_registered_keys2(int fd,
TSS_UUID *uuid,
TSS_UUID *tcs_uuid,
UINT32 *size,
TSS_KM_KEYINFO2 **keys)
{
TSS_RESULT result;
struct key_disk_cache *cache_entries;
UINT32 cache_size, i, j;
TSS_KM_KEYINFO2 *keyinfos = NULL;
TSS_UUID *find_uuid;
if ((result = psfile_get_all_cache_entries(fd, &cache_size, &cache_entries)))
return result;
if (cache_size == 0) {
if (uuid)
return TSPERR(TSS_E_PS_KEY_NOTFOUND);
else {
*size = 0;
*keys = NULL;
return TSS_SUCCESS;
}
}
if (uuid) {
find_uuid = uuid;
j = 0;
restart_search:
/* Search for the requested UUID. When found, allocate new space for it, copy
* it in, then change the uuid to be searched for it its parent and start over. */
for (i = 0; i < cache_size; i++) {
/*Return 0 if normal finish*/
if (!memcmp(&cache_entries[i].uuid, find_uuid, sizeof(TSS_UUID))) {
if (!(keyinfos = realloc(keyinfos,
(j+1) * sizeof(TSS_KM_KEYINFO2)))) {
free(cache_entries);
free(keyinfos);
return TSPERR(TSS_E_OUTOFMEMORY);
}
/* Here the key UUID is found and needs to be copied for the array*/
/* Initializes the keyinfos with 0's*/
__tspi_memset(&keyinfos[j], 0, sizeof(TSS_KM_KEYINFO2));
if ((result = copy_key_info2(fd, &keyinfos[j], &cache_entries[i]))) {
free(cache_entries);
free(keyinfos);
return result;
}
find_uuid = &keyinfos[j].parentKeyUUID;
j++;
goto restart_search;
}
}
/* Searching for keys in the user PS will always lead us up to some key in the
* system PS. Return that key's uuid so that the upper layers can call down to TCS
* to search for it. */
memcpy(tcs_uuid, find_uuid, sizeof(TSS_UUID));
*size = j;
} else {
if ((keyinfos = calloc(cache_size, sizeof(TSS_KM_KEYINFO2))) == NULL) {
LogDebug("malloc of %zu bytes failed.",
cache_size * sizeof(TSS_KM_KEYINFO2));
free(cache_entries);
return TSPERR(TSS_E_OUTOFMEMORY);
}
for (i = 0; i < cache_size; i++) {
if ((result = copy_key_info2(fd, &keyinfos[i], &cache_entries[i]))) {
free(cache_entries);
free(keyinfos);
return result;
}
}
*size = cache_size;
}
free(cache_entries);
*keys = keyinfos;
return TSS_SUCCESS;
}
/*
* read into the PS file and return the number of keys
*/
UINT32
psfile_get_num_keys(int fd)
{
UINT32 num_keys;
int rc;
/* go to the number of keys */
rc = lseek(fd, TSSPS_NUM_KEYS_OFFSET, SEEK_SET);
if (rc == ((off_t)-1)) {
LogDebug("lseek: %s", strerror(errno));
return 0;
}
rc = read(fd, &num_keys, sizeof(UINT32));
if (rc < 0) {
LogDebug("read of %zd bytes: %s", sizeof(UINT32), strerror(errno));
return 0;
} else if ((unsigned)rc < sizeof(UINT32)) {
num_keys = 0;
}
/* The system PS file is written in little-endian */
num_keys = LE_32(num_keys);
return num_keys;
}
/*
* disk store format:
*
* TrouSerS 0.2.1+
* Version 1: cached?
* [BYTE PS version = '\1']
* [UINT32 num_keys_on_disk ]
* [TSS_UUID uuid0 ] yes
* [TSS_UUID uuid_parent0 ] yes
* [UINT16 pub_data_size0 ] yes
* [UINT16 blob_size0 ] yes
* [UINT32 vendor_data_size0] yes
* [UINT16 cache_flags0 ] yes
* [BYTE[] pub_data0 ]
* [BYTE[] blob0 ]
* [BYTE[] vendor_data0 ]
* [...]
*
*/
TSS_RESULT
psfile_get_cache_entry_by_uuid(int fd, TSS_UUID *uuid, struct key_disk_cache *c)
{
UINT32 i, num_keys = psfile_get_num_keys(fd);
int offset;
TSS_RESULT result;
BYTE found = 0;
if (num_keys == 0)
return TSPERR(TSS_E_PS_KEY_NOTFOUND);
/* make sure the file pointer is where we expect, just after the number
* of keys on disk at the head of the file
*/
offset = lseek(fd, TSSPS_KEYS_OFFSET, SEEK_SET);
if (offset == ((off_t)-1)) {
LogDebug("lseek: %s", strerror(errno));
return TSPERR(TSS_E_INTERNAL_ERROR);
}
for (i = 0; i < num_keys && !found; i++) {
offset = lseek(fd, 0, SEEK_CUR);
if (offset == ((off_t)-1)) {
LogDebug("lseek: %s", strerror(errno));
return TSPERR(TSS_E_INTERNAL_ERROR);
}
c->offset = offset;
/* read UUID */
if ((result = read_data(fd, (void *)&c->uuid, sizeof(TSS_UUID)))) {
LogDebug("%s", __FUNCTION__);
return result;
}
if (!memcmp(&c->uuid, uuid, sizeof(TSS_UUID))) {
found = 1;
/* read parent UUID */
if ((result = read_data(fd, (void *)&c->parent_uuid, sizeof(TSS_UUID)))) {
LogDebug("%s", __FUNCTION__);
return result;
}
} else {
/* fast forward over the parent UUID */
offset = lseek(fd, sizeof(TSS_UUID), SEEK_CUR);
if (offset == ((off_t)-1)) {
LogDebug("lseek: %s", strerror(errno));
return TSPERR(TSS_E_INTERNAL_ERROR);
}
}
/* pub data size */
if ((result = read_data(fd, &c->pub_data_size, sizeof(UINT16)))) {
LogDebug("%s", __FUNCTION__);
return result;
}
c->pub_data_size = LE_16(c->pub_data_size);
DBG_ASSERT(c->pub_data_size <= 2048 && c->pub_data_size > 0);
/* blob size */
if ((result = read_data(fd, &c->blob_size, sizeof(UINT16)))) {
LogDebug("%s", __FUNCTION__);
return result;
}
c->blob_size = LE_16(c->blob_size);
DBG_ASSERT(c->blob_size <= 4096 && c->blob_size > 0);
/* vendor data size */
if ((result = read_data(fd, &c->vendor_data_size, sizeof(UINT32)))) {
LogDebug("%s", __FUNCTION__);
return result;
}
c->vendor_data_size = LE_32(c->vendor_data_size);
/* cache flags */
if ((result = read_data(fd, &c->flags, sizeof(UINT16)))) {
LogDebug("%s", __FUNCTION__);
return result;
}
c->flags = LE_16(c->flags);
/* fast forward over the pub key */
offset = lseek(fd, c->pub_data_size, SEEK_CUR);
if (offset == ((off_t)-1)) {
LogDebug("lseek: %s", strerror(errno));
return TSPERR(TSS_E_INTERNAL_ERROR);
}
/* fast forward over the blob */
offset = lseek(fd, c->blob_size, SEEK_CUR);
if (offset == ((off_t)-1)) {
LogDebug("lseek: %s", strerror(errno));
return TSPERR(TSS_E_INTERNAL_ERROR);
}
/* ignore vendor data in user ps */
}
return found ? TSS_SUCCESS : TSPERR(TSS_E_PS_KEY_NOTFOUND);
}
TSS_RESULT
psfile_get_cache_entry_by_pub(int fd, UINT32 pub_size, BYTE *pub, struct key_disk_cache *c)
{
BYTE blob[2048];
UINT32 i, num_keys = psfile_get_num_keys(fd);
int offset;
TSS_RESULT result;
if (num_keys == 0)
return TSPERR(TSS_E_PS_KEY_NOTFOUND);
/* make sure the file pointer is where we expect, just after the number
* of keys on disk at the head of the file
*/
offset = lseek(fd, TSSPS_KEYS_OFFSET, SEEK_SET);
if (offset == ((off_t)-1)) {
LogDebug("lseek: %s", strerror(errno));
return TSPERR(TSS_E_INTERNAL_ERROR);
}
for (i = 0; i < num_keys; i++) {
offset = lseek(fd, 0, SEEK_CUR);
if (offset == ((off_t)-1)) {
LogDebug("lseek: %s", strerror(errno));
return TSPERR(TSS_E_INTERNAL_ERROR);
}
c->offset = offset;
/* read UUID */
if ((result = read_data(fd, (void *)&c->uuid, sizeof(TSS_UUID)))) {
LogDebug("%s", __FUNCTION__);
return result;
}
/* read parent UUID */
if ((result = read_data(fd, (void *)&c->parent_uuid, sizeof(TSS_UUID)))) {
LogDebug("%s", __FUNCTION__);
return result;
}
/* pub data size */
if ((result = read_data(fd, &c->pub_data_size, sizeof(UINT16)))) {
LogDebug("%s", __FUNCTION__);
return result;
}
c->pub_data_size = LE_16(c->pub_data_size);
DBG_ASSERT(c->pub_data_size <= 2048 && c->pub_data_size > 0);
/* blob size */
if ((result = read_data(fd, &c->blob_size, sizeof(UINT16)))) {
LogDebug("%s", __FUNCTION__);
return result;
}
c->blob_size = LE_16(c->blob_size);
DBG_ASSERT(c->blob_size <= 4096 && c->blob_size > 0);
/* vendor data size */
if ((result = read_data(fd, &c->vendor_data_size, sizeof(UINT32)))) {
LogDebug("%s", __FUNCTION__);
return result;
}
c->vendor_data_size = LE_32(c->vendor_data_size);
/* cache flags */
if ((result = read_data(fd, &c->flags, sizeof(UINT16)))) {
LogDebug("%s", __FUNCTION__);
return result;
}
c->flags = LE_16(c->flags);
if (c->pub_data_size == pub_size) {
/* read in the pub key */
if ((result = read_data(fd, blob, c->pub_data_size))) {
LogDebug("%s", __FUNCTION__);
return result;
}
if (!memcmp(blob, pub, pub_size))
break;
}
/* fast forward over the blob */
offset = lseek(fd, c->blob_size, SEEK_CUR);
if (offset == ((off_t)-1)) {
LogDebug("lseek: %s", strerror(errno));
return TSPERR(TSS_E_INTERNAL_ERROR);
}
/* ignore vendor data */
}
return TSS_SUCCESS;
}