nxdumptool/source/core/legal_info.c

/*
 * legal_info.c
 *
 * Copyright (c) 2020-2022, 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 of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * nxdumptool is distributed in the hope that 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 <https://www.gnu.org/licenses/>.
 */

#include "nxdt_utils.h"
#include "legal_info.h"

bool legalInfoInitializeContext(LegalInfoContext *out, NcaContext *nca_ctx)
{
    if (!out || !nca_ctx || !*(nca_ctx->content_id_str) || nca_ctx->content_type != NcmContentType_LegalInformation || nca_ctx->content_size < NCA_FULL_HEADER_LENGTH || \
        (nca_ctx->storage_id != NcmStorageId_GameCard && !nca_ctx->ncm_storage) || (nca_ctx->storage_id == NcmStorageId_GameCard && !nca_ctx->gamecard_offset) || \
        nca_ctx->header.content_type != NcaContentType_Manual || nca_ctx->content_type_ctx || !out)
    {
        LOG_MSG_ERROR("Invalid parameters!");
        return false;
    }

    RomFileSystemContext romfs_ctx = {0};
    RomFileSystemFileEntry *xml_entry = NULL;

    bool success = false;

    /* Free output context beforehand. */
    legalInfoFreeContext(out);

    /* Initialize RomFS context. */
    if (!romfsInitializeContext(&romfs_ctx, &(nca_ctx->fs_ctx[0]), NULL))
    {
        LOG_MSG_ERROR("Failed to initialize RomFS context!");
        goto end;
    }

    /* Retrieve RomFS file entry for 'legalinfo.xml'. */
    if (!(xml_entry = romfsGetFileEntryByPath(&romfs_ctx, "/legalinfo.xml")))
    {
        LOG_MSG_ERROR("Failed to retrieve file entry for \"legalinfo.xml\" from RomFS!");
        goto end;
    }

    LOG_MSG_INFO("Found 'legalinfo.xml' entry in LegalInformation NCA \"%s\".", nca_ctx->content_id_str);

    /* Verify XML size. */
    if (!xml_entry->size)
    {
        LOG_MSG_ERROR("Invalid XML size!");
        goto end;
    }

    /* Allocate memory for the XML. */
    out->authoring_tool_xml_size = xml_entry->size;
    if (!(out->authoring_tool_xml = malloc(out->authoring_tool_xml_size)))
    {
        LOG_MSG_ERROR("Failed to allocate memory for the XML!");
        goto end;
    }

    /* Read NACP data into memory buffer. */
    if (!romfsReadFileEntryData(&romfs_ctx, xml_entry, out->authoring_tool_xml, out->authoring_tool_xml_size, 0))
    {
        LOG_MSG_ERROR("Failed to read XML!");
        goto end;
    }

    /* Update NCA context pointer in output context. */
    out->nca_ctx = nca_ctx;

    /* Update content type context info in NCA context. */
    nca_ctx->content_type_ctx = out;
    nca_ctx->content_type_ctx_patch = false;

    success = true;

end:
    romfsFreeContext(&romfs_ctx);

    if (!success) legalInfoFreeContext(out);

    return success;
}