int ntfs_get_ntfs_reparse_data(ntfs_inode *ni, char *value, size_t size)
{
REPARSE_POINT *reparse_attr;
s64 attr_size;
attr_size = 0; /* default to no data and no error */
if (ni) {
if (ni->flags & FILE_ATTR_REPARSE_POINT) {
reparse_attr = (REPARSE_POINT*)ntfs_attr_readall(ni,
AT_REPARSE_POINT,(ntfschar*)NULL, 0, &attr_size);
if (reparse_attr) {
if (attr_size <= (s64)size) {
if (value)
memcpy(value,reparse_attr,
attr_size);
else
errno = EINVAL;
}
free(reparse_attr);
}
} else
errno = ENODATA;
}
return (attr_size ? (int)attr_size : -errno);
}
int ntfs_get_efs_info(const char *path,
char *value, size_t size, ntfs_inode *ni)
{
EFS_ATTR_HEADER *efs_info;
s64 attr_size = 0;
if (ni) {
if (ni->flags & FILE_ATTR_ENCRYPTED) {
efs_info = (EFS_ATTR_HEADER*)ntfs_attr_readall(ni,
AT_LOGGED_UTILITY_STREAM,(ntfschar*)NULL, 0,
&attr_size);
if (efs_info
&& (le32_to_cpu(efs_info->length) == attr_size)) {
if (attr_size <= (s64)size) {
if (value)
memcpy(value,efs_info,attr_size);
else {
errno = EFAULT;
attr_size = 0;
}
} else
if (size) {
errno = ERANGE;
attr_size = 0;
}
free (efs_info);
} else {
if (efs_info) {
free(efs_info);
ntfs_log_info("Bad efs_info for file %s\n",path);
} else {
ntfs_log_info("Could not get efsinfo"
" for file %s\n", path);
}
errno = EIO;
attr_size = 0;
}
} else {
errno = ENODATA;
ntfs_log_info("File %s is not encrypted",path);
}
}
return (attr_size ? (int)attr_size : -errno);
}
BOOL ntfs_possible_symlink(ntfs_inode *ni)
{
s64 attr_size = 0;
REPARSE_POINT *reparse_attr;
BOOL possible;
possible = FALSE;
reparse_attr = (REPARSE_POINT*)ntfs_attr_readall(ni,
AT_REPARSE_POINT,(ntfschar*)NULL, 0, &attr_size);
if (reparse_attr && attr_size) {
switch (reparse_attr->reparse_tag) {
case IO_REPARSE_TAG_MOUNT_POINT :
case IO_REPARSE_TAG_SYMLINK :
possible = TRUE;
default : ;
}
free(reparse_attr);
}
return (possible);
}
/**
* ntfs_inode_fek_get -
*/
static ntfs_fek *ntfs_inode_fek_get(ntfs_inode *inode,
ntfs_rsa_private_key rsa_key, char *thumbprint,
int thumbprint_size, NTFS_DF_TYPES df_type)
{
EFS_ATTR_HEADER *efs;
EFS_DF_ARRAY_HEADER *df_array = NULL;
ntfs_fek *fek = NULL;
/* Obtain the $EFS contents. */
efs = ntfs_attr_readall(inode, AT_LOGGED_UTILITY_STREAM, EFS, 4, NULL);
if (!efs) {
ntfs_log_perror("Failed to read $EFS attribute");
return NULL;
}
/*
* Depending on whether the key is a normal key or a data recovery key,
* iterate through the DDF or DRF array, respectively.
*/
if (df_type == DF_TYPE_DDF) {
if (efs->offset_to_ddf_array)
df_array = (EFS_DF_ARRAY_HEADER*)((u8*)efs +
le32_to_cpu(efs->offset_to_ddf_array));
else
ntfs_log_error("There are no entries in the DDF "
"array.\n");
} else if (df_type == DF_TYPE_DRF) {
if (efs->offset_to_drf_array)
df_array = (EFS_DF_ARRAY_HEADER*)((u8*)efs +
le32_to_cpu(efs->offset_to_drf_array));
else
ntfs_log_error("There are no entries in the DRF "
"array.\n");
} else
ntfs_log_error("Invalid DF type.\n");
if (df_array)
fek = ntfs_df_array_fek_get(df_array, rsa_key, thumbprint,
thumbprint_size);
free(efs);
return fek;
}
int ntfs_get_ntfs_object_id(ntfs_inode *ni, char *value, size_t size)
{
OBJECT_ID_ATTR full_objectid;
OBJECT_ID_ATTR *objectid_attr;
s64 attr_size;
int full_size;
full_size = 0; /* default to no data and some error to be defined */
if (ni) {
objectid_attr = (OBJECT_ID_ATTR*)ntfs_attr_readall(ni,
AT_OBJECT_ID,(ntfschar*)NULL, 0, &attr_size);
if (objectid_attr) {
/* restrict to only GUID present in attr */
if (attr_size == sizeof(GUID)) {
memcpy(&full_objectid.object_id,
objectid_attr,sizeof(GUID));
full_size = sizeof(GUID);
/* get data from index, if any */
if (!merge_index_data(ni, objectid_attr,
&full_objectid)) {
full_size = sizeof(OBJECT_ID_ATTR);
}
if (full_size <= (s64)size) {
if (value)
memcpy(value,&full_objectid,
full_size);
else
errno = EINVAL;
}
} else {
/* unexpected size, better return unsupported */
errno = ENOTSUP;
full_size = 0;
}
free(objectid_attr);
} else
errno = ENODATA;
}
return (full_size ? (int)full_size : -errno);
}
static VCN ntfs_ibm_get_free(ntfs_index_context *icx)
{
u8 *bm;
int bit;
s64 vcn, byte, size;
ntfs_log_trace("Entering\n");
bm = ntfs_attr_readall(icx->ni, AT_BITMAP, icx->name, icx->name_len,
&size);
if (!bm)
return (VCN)-1;
for (byte = 0; byte < size; byte++) {
if (bm[byte] == 255)
continue;
for (bit = 0; bit < 8; bit++) {
if (!(bm[byte] & (1 << bit))) {
vcn = ntfs_ibm_pos_to_vcn(icx, byte * 8 + bit);
goto out;
}
}
}
vcn = ntfs_ibm_pos_to_vcn(icx, size * 8);
out:
ntfs_log_trace("allocated vcn: %lld\n", (long long)vcn);
if (ntfs_ibm_set(icx, vcn))
vcn = (VCN)-1;
free(bm);
return vcn;
}
char *ntfs_make_symlink(ntfs_inode *ni, const char *mnt_point,
int *pattr_size)
{
s64 attr_size = 0;
char *target;
unsigned int offs;
unsigned int lth;
ntfs_volume *vol;
REPARSE_POINT *reparse_attr;
struct MOUNT_POINT_REPARSE_DATA *mount_point_data;
struct SYMLINK_REPARSE_DATA *symlink_data;
enum { FULL_TARGET, ABS_TARGET, REL_TARGET } kind;
ntfschar *p;
BOOL bad;
BOOL isdir;
target = (char*)NULL;
bad = TRUE;
isdir = (ni->mrec->flags & MFT_RECORD_IS_DIRECTORY)
!= const_cpu_to_le16(0);
vol = ni->vol;
reparse_attr = (REPARSE_POINT*)ntfs_attr_readall(ni,
AT_REPARSE_POINT,(ntfschar*)NULL, 0, &attr_size);
if (reparse_attr && attr_size
&& valid_reparse_data(ni, reparse_attr, attr_size)) {
switch (reparse_attr->reparse_tag) {
case IO_REPARSE_TAG_MOUNT_POINT :
mount_point_data = (struct MOUNT_POINT_REPARSE_DATA*)
reparse_attr->reparse_data;
offs = le16_to_cpu(mount_point_data->subst_name_offset);
lth = le16_to_cpu(mount_point_data->subst_name_length);
/* reparse data consistency has been checked */
target = ntfs_get_fulllink(vol,
(ntfschar*)&mount_point_data->path_buffer[offs],
lth/2, mnt_point, isdir);
if (target)
bad = FALSE;
break;
case IO_REPARSE_TAG_SYMLINK :
symlink_data = (struct SYMLINK_REPARSE_DATA*)
reparse_attr->reparse_data;
offs = le16_to_cpu(symlink_data->subst_name_offset);
lth = le16_to_cpu(symlink_data->subst_name_length);
p = (ntfschar*)&symlink_data->path_buffer[offs];
/*
* Predetermine the kind of target,
* the called function has to make a full check
*/
if (*p++ == const_cpu_to_le16('\\')) {
if ((*p == const_cpu_to_le16('?'))
|| (*p == const_cpu_to_le16('\\')))
kind = FULL_TARGET;
else
kind = ABS_TARGET;
} else
if (*p == const_cpu_to_le16(':'))
kind = ABS_TARGET;
else
kind = REL_TARGET;
p--;
/* reparse data consistency has been checked */
switch (kind) {
case FULL_TARGET :
if (!(symlink_data->flags
& const_cpu_to_le32(1))) {
target = ntfs_get_fulllink(vol,
p, lth/2,
mnt_point, isdir);
if (target)
bad = FALSE;
}
break;
case ABS_TARGET :
if (symlink_data->flags
& const_cpu_to_le32(1)) {
target = ntfs_get_abslink(vol,
p, lth/2,
mnt_point, isdir);
if (target)
bad = FALSE;
}
break;
case REL_TARGET :
if (symlink_data->flags
& const_cpu_to_le32(1)) {
target = ntfs_get_rellink(ni,
p, lth/2);
if (target)
bad = FALSE;
}
break;
}
break;
}
free(reparse_attr);
}
*pattr_size = attr_size;
if (bad)
errno = EOPNOTSUPP;
return (target);
}
