read_hashed.c

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <3ds.h>
#include "csvc.h"

u8 *rdbuf = NULL;
Handle fsPxiHandle = 0;

void test1(void)
{
    Result res = 0;

    //u64 tid = 0x0004001000022E00ULL; // EUR AR Games
    //FS_MediaType medtype = MEDIATYPE_NAND;
    //u64 tid = 0x000400000FF55600ULL; // some random hb app
    //FS_MediaType medtype = MEDIATYPE_SD;
    u64 tid = 0;
    FS_MediaType medtype = MEDIATYPE_GAME_CARD;

    u32 archivePath[] = {tid & 0xFFFFFFFF, (tid >> 32) & 0xFFFFFFFF, medtype, 0x00000000};
    static const u32 codePath[] = {0x00000000, 0x00000000, 0x00000002, 0x646F632E, 0x00000065};

    FSPXI_File fileHandle = 0;
    FSPXI_Archive archiveHandle = 0;
    res = FSPXI_OpenArchive(fsPxiHandle, &archiveHandle, ARCHIVE_SAVEDATA_AND_CONTENT, (FS_Path){PATH_BINARY, sizeof(archivePath), archivePath});
    if (R_FAILED(res))
        printf("Failed to open archive: %08lx\n", res);

    res = FSPXI_OpenFile(fsPxiHandle, &fileHandle, archiveHandle, (FS_Path){PATH_BINARY, sizeof(codePath), codePath}, FS_OPEN_READ, 0);

    if (R_FAILED(res))
        printf("Failed to open file: %08lx\n", res);

    u32 numRead = 0;
    u32 sz = 0x1000;
    u32 szHashBlock = 0x1000;
    // 0xD900458x expected
    res = FSPXI_ReadFileSHA256(fsPxiHandle, fileHandle, &numRead, 0, rdbuf+1, sz, rdbuf + 0x20000, (sz / szHashBlock) * 32, szHashBlock);
    printf("ReadFileSha256: %08lx\n", res);

    FSPXI_CloseFile(fsPxiHandle, fileHandle);
    FSPXI_CloseArchive(fsPxiHandle, archiveHandle);
}


int main(int argc, char* argv[])
{
    gfxInitDefault();
    consoleInit(GFX_TOP, NULL);
    rdbuf = linearMemAlign(20 << 20, 0x1000);

    printf("Hello, world!\n");
    Result res = svcControlService(SERVICEOP_STEAL_CLIENT_SESSION, &fsPxiHandle, "PxiFS0"); // custom svc
    printf("steal res = %08lx\n", res);

    test1();
    svcCloseHandle(fsPxiHandle);
    linearFree(rdbuf);
    // Main loop
    while (aptMainLoop())
    {
        gspWaitForVBlank();
        gfxSwapBuffers();
        hidScanInput();

        // Your code goes here
        u32 kDown = hidKeysDown();
        if (kDown & KEY_START)
            break; // break in order to return to hbmenu
    }

    gfxExit();
    return 0;
}