mirror of
https://github.com/DarkMatterCore/nxdumptool.git
synced 2024-11-13 22:16:45 +00:00
221 lines
7.3 KiB
C
221 lines
7.3 KiB
C
/*
|
|
* pfs.c
|
|
*
|
|
* Copyright (c) 2020, DarkMatterCore <pabloacurielz@gmail.com>.
|
|
*
|
|
* This file is part of nxdumptool (https://github.com/DarkMatterCore/nxdumptool).
|
|
*
|
|
* nxdumptool is free software; you can redistribute it and/or modify it
|
|
* under the terms and conditions of the GNU General Public License,
|
|
* version 2, as published by the Free Software Foundation.
|
|
*
|
|
* nxdumptool is distributed in the hope it will be useful, but WITHOUT
|
|
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
|
|
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
|
|
* more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
#include "utils.h"
|
|
#include "pfs.h"
|
|
|
|
bool pfsInitializeContext(PartitionFileSystemContext *out, NcaFsSectionContext *nca_fs_ctx)
|
|
{
|
|
if (!out || !nca_fs_ctx || !nca_fs_ctx->enabled || nca_fs_ctx->section_type != NcaFsSectionType_PartitionFs || nca_fs_ctx->header.fs_type != NcaFsType_PartitionFs || \
|
|
nca_fs_ctx->header.hash_type != NcaHashType_HierarchicalSha256)
|
|
{
|
|
LOGFILE("Invalid parameters!");
|
|
return false;
|
|
}
|
|
|
|
u32 magic = 0;
|
|
|
|
PartitionFileSystemHeader pfs_header = {0};
|
|
PartitionFileSystemEntry *main_npdm_entry = NULL;
|
|
|
|
u32 hash_region_count = 0;
|
|
NcaRegion *hash_region = NULL;
|
|
|
|
/* Clear output partition FS context. */
|
|
memset(out, 0, sizeof(PartitionFileSystemContext));
|
|
|
|
/* Fill context. */
|
|
out->nca_fs_ctx = nca_fs_ctx;
|
|
|
|
if (!ncaValidateHierarchicalSha256Offsets(&(nca_fs_ctx->header.hash_data.hierarchical_sha256_data), nca_fs_ctx->section_size))
|
|
{
|
|
LOGFILE("Invalid HierarchicalSha256 block!");
|
|
return false;
|
|
}
|
|
|
|
hash_region_count = nca_fs_ctx->header.hash_data.hierarchical_sha256_data.hash_region_count;
|
|
hash_region = &(nca_fs_ctx->header.hash_data.hierarchical_sha256_data.hash_region[hash_region_count - 1]);
|
|
|
|
out->offset = hash_region->offset;
|
|
out->size = hash_region->size;
|
|
|
|
/* Read partial PFS header. */
|
|
if (!ncaReadFsSection(nca_fs_ctx, &pfs_header, sizeof(PartitionFileSystemHeader), out->offset))
|
|
{
|
|
LOGFILE("Failed to read partial partition FS header!");
|
|
return false;
|
|
}
|
|
|
|
magic = __builtin_bswap32(pfs_header.magic);
|
|
if (magic != PFS0_MAGIC)
|
|
{
|
|
LOGFILE("Invalid partition FS magic word! (0x%08X).", magic);
|
|
return false;
|
|
}
|
|
|
|
if (!pfs_header.entry_count || !pfs_header.name_table_size)
|
|
{
|
|
LOGFILE("Invalid partition FS entry count / name table size!");
|
|
return false;
|
|
}
|
|
|
|
/* Calculate full partition FS header size. */
|
|
out->header_size = (sizeof(PartitionFileSystemHeader) + (pfs_header.entry_count * sizeof(PartitionFileSystemEntry)) + pfs_header.name_table_size);
|
|
|
|
/* Allocate memory for the full partition FS header. */
|
|
out->header = calloc(out->header_size, sizeof(u8));
|
|
if (!out->header)
|
|
{
|
|
LOGFILE("Unable to allocate 0x%lX bytes buffer for the full partition FS header!", out->header_size);
|
|
return false;
|
|
}
|
|
|
|
/* Read full partition FS header. */
|
|
if (!ncaReadFsSection(nca_fs_ctx, out->header, out->header_size, out->offset))
|
|
{
|
|
LOGFILE("Failed to read full partition FS header!");
|
|
pfsFreeContext(out);
|
|
return false;
|
|
}
|
|
|
|
/* Check if we're dealing with an ExeFS section. */
|
|
if ((main_npdm_entry = pfsGetEntryByName(out, "main.npdm")) != NULL && pfsReadEntryData(out, main_npdm_entry, &magic, sizeof(u32), 0) && \
|
|
__builtin_bswap32(magic) == NPDM_META_MAGIC) out->is_exefs = true;
|
|
|
|
return true;
|
|
}
|
|
|
|
bool pfsReadPartitionData(PartitionFileSystemContext *ctx, void *out, u64 read_size, u64 offset)
|
|
{
|
|
if (!ctx || !ctx->nca_fs_ctx || !ctx->size || !out || !read_size || offset >= ctx->size || (offset + read_size) > ctx->size)
|
|
{
|
|
LOGFILE("Invalid parameters!");
|
|
return false;
|
|
}
|
|
|
|
/* Read partition data. */
|
|
if (!ncaReadFsSection(ctx->nca_fs_ctx, out, read_size, ctx->offset + offset))
|
|
{
|
|
LOGFILE("Failed to read partition FS data!");
|
|
return false;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
bool pfsReadEntryData(PartitionFileSystemContext *ctx, PartitionFileSystemEntry *fs_entry, void *out, u64 read_size, u64 offset)
|
|
{
|
|
if (!ctx || !fs_entry || fs_entry->offset >= ctx->size || !fs_entry->size || (fs_entry->offset + fs_entry->size) > ctx->size || !out || !read_size || offset >= fs_entry->size || \
|
|
(offset + read_size) > fs_entry->size)
|
|
{
|
|
LOGFILE("Invalid parameters!");
|
|
return false;
|
|
}
|
|
|
|
/* Read entry data. */
|
|
if (!pfsReadPartitionData(ctx, out, read_size, ctx->header_size + fs_entry->offset + offset))
|
|
{
|
|
LOGFILE("Failed to read partition FS entry data!");
|
|
return false;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
bool pfsGetEntryIndexByName(PartitionFileSystemContext *ctx, const char *name, u32 *out_idx)
|
|
{
|
|
size_t name_len = 0;
|
|
PartitionFileSystemEntry *fs_entry = NULL;
|
|
u32 entry_count = pfsGetEntryCount(ctx);
|
|
char *name_table = pfsGetNameTable(ctx);
|
|
|
|
if (!entry_count || !name_table || !name || !(name_len = strlen(name)) || !out_idx)
|
|
{
|
|
LOGFILE("Invalid parameters!");
|
|
return false;
|
|
}
|
|
|
|
for(u32 i = 0; i < entry_count; i++)
|
|
{
|
|
if (!(fs_entry = pfsGetEntryByIndex(ctx, i)))
|
|
{
|
|
LOGFILE("Failed to retrieve partition FS entry #%u!", i);
|
|
return false;
|
|
}
|
|
|
|
if (strlen(name_table + fs_entry->name_offset) == name_len && !strcmp(name_table + fs_entry->name_offset, name))
|
|
{
|
|
*out_idx = i;
|
|
return true;
|
|
}
|
|
}
|
|
|
|
//LOGFILE("Unable to find partition FS entry \"%s\"!", name);
|
|
|
|
return false;
|
|
}
|
|
|
|
bool pfsGetTotalDataSize(PartitionFileSystemContext *ctx, u64 *out_size)
|
|
{
|
|
u64 total_size = 0;
|
|
u32 entry_count = pfsGetEntryCount(ctx);
|
|
PartitionFileSystemEntry *fs_entry = NULL;
|
|
|
|
if (!entry_count || !out_size)
|
|
{
|
|
LOGFILE("Invalid parameters!");
|
|
return false;
|
|
}
|
|
|
|
for(u32 i = 0; i < entry_count; i++)
|
|
{
|
|
if (!(fs_entry = pfsGetEntryByIndex(ctx, i)))
|
|
{
|
|
LOGFILE("Failed to retrieve partition FS entry #%u!", i);
|
|
return false;
|
|
}
|
|
|
|
total_size += fs_entry->size;
|
|
}
|
|
|
|
*out_size = total_size;
|
|
|
|
return true;
|
|
}
|
|
|
|
bool pfsGenerateEntryPatch(PartitionFileSystemContext *ctx, PartitionFileSystemEntry *fs_entry, const void *data, u64 data_size, u64 data_offset, NcaHierarchicalSha256Patch *out)
|
|
{
|
|
if (!ctx || !ctx->nca_fs_ctx || !ctx->header_size || !ctx->header || !fs_entry || fs_entry->offset >= ctx->size || !fs_entry->size || (fs_entry->offset + fs_entry->size) > ctx->size || !data || \
|
|
!data_size || data_offset >= fs_entry->size || (data_offset + data_size) > fs_entry->size || !out)
|
|
{
|
|
LOGFILE("Invalid parameters!");
|
|
return false;
|
|
}
|
|
|
|
u64 partition_offset = (ctx->header_size + fs_entry->offset + data_offset);
|
|
|
|
if (!ncaGenerateHierarchicalSha256Patch(ctx->nca_fs_ctx, data, data_size, partition_offset, out))
|
|
{
|
|
LOGFILE("Failed to generate 0x%lX bytes HierarchicalSha256 patch at offset 0x%lX for partition FS entry!", data_size, partition_offset);
|
|
return false;
|
|
}
|
|
|
|
return true;
|
|
}
|