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Fixed parsing of 32KiB page ESE databases from Windows Server 2025 #79

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Fixed parsing of 32KiB page ESE databases from Windows Server 2025 #79

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9 changes: 9 additions & 0 deletions libesedb/libesedb_page_header.c
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Original file line number Diff line number Diff line change
Expand Up @@ -240,6 +240,15 @@ int libesedb_page_header_read_data(
( (esedb_page_header_t *) data )->available_page_tag,
page_header->available_page_tag );

/* In the 32KiB page format the upper 4 bits of the available page tag
* are reserved (ctagReserved) and the lower 12 bits contain the actual
* number of page tags
*/
if( io_handle->page_size >= 32768 )
{
page_header->available_page_tag &= 0x0fff;
}

byte_stream_copy_to_uint32_little_endian(
( (esedb_page_header_t *) data )->page_flags,
page_header->flags );
Expand Down
47 changes: 45 additions & 2 deletions libesedb/libesedb_page_tree.c
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Original file line number Diff line number Diff line change
Expand Up @@ -1453,8 +1453,6 @@ int libesedb_page_tree_get_get_first_leaf_page_number(

return( -1 );
}
last_leaf_page_number = safe_leaf_page_number;

if( libfdata_vector_get_element_value_by_index(
page_tree->pages_vector,
(intptr_t *) file_io_handle,
Expand All @@ -1474,6 +1472,29 @@ int libesedb_page_tree_get_get_first_leaf_page_number(

return( -1 );
}
/* Stop backward walk if the page is not a leaf page
*/
if( libesedb_page_get_flags(
page,
&page_flags,
error ) != 1 )
{
libcerror_error_set(
error,
LIBCERROR_ERROR_DOMAIN_RUNTIME,
LIBCERROR_RUNTIME_ERROR_GET_FAILED,
"%s: unable to retrieve page flags from page: %" PRIu32 ".",
function,
safe_leaf_page_number );

return( -1 );
}
if( ( page_flags & LIBESEDB_PAGE_FLAG_IS_LEAF ) == 0 )
{
break;
}
last_leaf_page_number = safe_leaf_page_number;

if( libesedb_page_get_previous_page_number(
page,
&safe_leaf_page_number,
Expand Down Expand Up @@ -1671,6 +1692,7 @@ int libesedb_page_tree_get_number_of_leaf_values(
libesedb_page_t *page = NULL;
static char *function = "libesedb_page_tree_get_number_of_leaf_values";
uint32_t leaf_page_number = 0;
uint32_t page_flags = 0;
int number_of_leaf_pages = 0;
int safe_number_of_leaf_values = 0;
int value_index = 0;
Expand Down Expand Up @@ -1763,6 +1785,27 @@ int libesedb_page_tree_get_number_of_leaf_values(

goto on_error;
}
/* Stop forward walk if the page is not a leaf page
*/
if( libesedb_page_get_flags(
page,
&page_flags,
error ) != 1 )
{
libcerror_error_set(
error,
LIBCERROR_ERROR_DOMAIN_RUNTIME,
LIBCERROR_RUNTIME_ERROR_GET_FAILED,
"%s: unable to retrieve page flags from page: %" PRIu32 ".",
function,
leaf_page_number );

goto on_error;
}
if( ( page_flags & LIBESEDB_PAGE_FLAG_IS_LEAF ) == 0 )
{
break;
}
if( libesedb_page_tree_get_number_of_leaf_values_from_leaf_page(
page_tree,
page,
Expand Down