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| author | midipix <writeonce@midipix.org> | 2016-12-22 17:26:52 -0500 |
|---|---|---|
| committer | midipix <writeonce@midipix.org> | 2016-12-22 17:26:52 -0500 |
| commit | 0cd9efed201a9e7ac7dd263977d8b045c82f2c35 (patch) | |
| tree | 913c2fde19456da0f5040e6ee1c736b43cf9eb56 /src | |
| parent | 030926d2c8da32a09fefd9c5e9ea4478cd0d4780 (diff) | |
| download | ntapi-0cd9efed201a9e7ac7dd263977d8b045c82f2c35.tar.bz2 ntapi-0cd9efed201a9e7ac7dd263977d8b045c82f2c35.tar.xz | |
__ntapi_tt_stat(): properly populate .dev_name_hash and .dev_name_strlen.
Diffstat (limited to 'src')
| -rw-r--r-- | src/fs/ntapi_tt_stat.c | 59 |
1 files changed, 44 insertions, 15 deletions
diff --git a/src/fs/ntapi_tt_stat.c b/src/fs/ntapi_tt_stat.c index fbcecca..9ad9975 100644 --- a/src/fs/ntapi_tt_stat.c +++ b/src/fs/ntapi_tt_stat.c @@ -26,6 +26,9 @@ int32_t __stdcall __ntapi_tt_stat( nt_iosb iosb; nt_unicode_string * sdev; nt_fai * fai; + wchar16_t * wch; + wchar16_t * wch_mark; + uint32_t hash; /* validation */ if (!hfile && !path) @@ -93,25 +96,51 @@ int32_t __stdcall __ntapi_tt_stat( if (status != NT_STATUS_SUCCESS) return status; - /* system-unique device name (simpler than statfs) */ - iosb.info = 0; - status = __ntapi->zw_query_object( - hfile, - NT_OBJECT_NAME_INFORMATION, - buffer, - buffer_size, - (uint32_t *)&iosb.info); - - if (status != NT_STATUS_SUCCESS) + /* system-unique device name */ + if ((status = __ntapi->zw_query_object( + hfile, + NT_OBJECT_NAME_INFORMATION, + buffer, + buffer_size, + (uint32_t *)&iosb.info))) return status; sdev = (nt_unicode_string *)buffer; - stat->dev_name_strlen = sdev->strlen - (uint16_t)stat->file_name_length; + wch = sdev->buffer; + + if (sdev->strlen < __DEVICE_PATH_PREFIX_LEN) + return NT_STATUS_INVALID_HANDLE; + + if ((wch[0] != '\\') + || (wch[1] != 'D') + || (wch[2] != 'e') + || (wch[3] != 'v') + || (wch[4] != 'i') + || (wch[5] != 'c') + || (wch[6] != 'e') + || (wch[7] != '\\')) + return NT_STATUS_INVALID_HANDLE; + + if ((sdev->strlen >= __DEVICE_MUP_PREFIX_LEN) + && (wch[8]=='M') + && (wch[9]=='u') + && (wch[10]=='p') + && (wch[11]=='\\')) { + stat->flags_out |= NT_STAT_MUP_DEVICE; + wch_mark = &wch[12]; + hash = __DEVICE_MUP_PREFIX_HASH; + } else { + wch_mark = &wch[8]; + hash = __DEVICE_PATH_PREFIX_HASH; + } + + for (wch=wch_mark; *wch!='\\'; wch++) + (void)0; - stat->dev_name_hash = __ntapi->tt_buffer_crc32( - 0, - sdev->buffer, - stat->dev_name_strlen); + stat->dev_name_strlen = (uint16_t)((wch - sdev->buffer) * sizeof(uint16_t)); + stat->dev_name_hash = __ntapi->tt_buffer_crc32( + hash,wch_mark, + sizeof(wchar16_t)*(wch-wch_mark)); if (flags & NT_STAT_DEV_NAME_COPY) { if (stat->dev_name_maxlen < sdev->strlen) |