/*
** icat
** The Sleuth Kit
**
** Brian Carrier [carrier <at> sleuthkit [dot] org]
** Copyright (c) 2006-2011 Brian Carrier, Basis Technology.  All Rights reserved
** Copyright (c) 2003-2005 Brian Carrier.  All rights reserved
**
** TASK
** Copyright (c) 2002 Brian Carrier, @stake Inc.  All rights reserved
**
** Copyright (c) 1997,1998,1999, International Business Machines
** Corporation and others. All Rights Reserved.

 * LICENSE
 *	This software is distributed under the IBM Public License.
 * AUTHOR(S)
 *	Wietse Venema
 *	IBM T.J. Watson Research
 *	P.O. Box 704
 *	Yorktown Heights, NY 10598, USA
 --*/

#include "tsk/tsk_tools_i.h"
#include "tsk/fs/apfs_fs.h"
#include <locale.h>

/* usage - explain and terminate */

static TSK_TCHAR *progname;

static void
usage()
{
    TFPRINTF(stderr,
        _TSK_T
        ("usage: %s [-hrRsvV] [-f fstype] [-i imgtype] [-b dev_sector_size] [-o imgoffset] image [images] inum[-typ[-id]]\n"),
        progname);
    tsk_fprintf(stderr, "\t-h: Do not display holes in sparse files\n");
    tsk_fprintf(stderr, "\t-r: Recover deleted file\n");
    tsk_fprintf(stderr,
        "\t-R: Recover deleted file and suppress recovery errors\n");
    tsk_fprintf(stderr, "\t-s: Display slack space at end of file\n");
    tsk_fprintf(stderr,
        "\t-i imgtype: The format of the image file (use '-i list' for supported types)\n");
    tsk_fprintf(stderr,
        "\t-b dev_sector_size: The size (in bytes) of the device sectors\n");
    tsk_fprintf(stderr,
        "\t-f fstype: File system type (use '-f list' for supported types)\n");
    tsk_fprintf(stderr,
        "\t-o imgoffset: The offset of the file system in the image (in sectors)\n");
    tsk_fprintf(stderr,
        "\t-P pooltype: Pool container type (use '-P list' for supported types)\n");
    tsk_fprintf(stderr,
        "\t-B pool_volume_block: Starting block (for pool volumes only)\n");
    tsk_fprintf(stderr, "\t-S snap_id: Snapshot ID (for APFS only)\n");
    tsk_fprintf(stderr, "\t-v: verbose to stderr\n");
    tsk_fprintf(stderr, "\t-V: Print version\n");
    tsk_fprintf(stderr, "\t-k password: Decryption password for encrypted volumes\n");

    exit(1);
}

int
main(int argc, char **argv1)
{
    TSK_IMG_TYPE_ENUM imgtype = TSK_IMG_TYPE_DETECT;
    TSK_IMG_INFO *img;

    TSK_OFF_T imgaddr = 0;
    TSK_FS_TYPE_ENUM fstype = TSK_FS_TYPE_DETECT;
    TSK_FS_INFO *fs;
    const char * password = "";

    TSK_POOL_TYPE_ENUM pooltype = TSK_POOL_TYPE_DETECT;
    TSK_OFF_T pvol_block = 0;
    TSK_OFF_T snap_id = 0;

    TSK_INUM_T inum;
    int fw_flags = 0;
    int ch;
    TSK_FS_ATTR_TYPE_ENUM type = TSK_FS_ATTR_TYPE_DEFAULT;
    uint16_t id = 0;
    uint8_t id_used = 0, type_used = 0;
    int retval;
    int suppress_recover_error = 0;
    TSK_TCHAR **argv;
    TSK_TCHAR *cp;
    unsigned int ssize = 0;

#ifdef TSK_WIN32
    // On Windows, get the wide arguments (mingw doesn't support wmain)
    argv = CommandLineToArgvW(GetCommandLineW(), &argc);
    if (argv == NULL) {
        fprintf(stderr, "Error getting wide arguments\n");
        exit(1);
    }
#else
    argv = (TSK_TCHAR **) argv1;
#endif

    progname = argv[0];
    setlocale(LC_ALL, "");

    while ((ch = GETOPT(argc, argv, _TSK_T("b:f:hi:o:rRsvVP:B:k:S:"))) > 0) {
        switch (ch) {
        case _TSK_T('?'):
        default:
            TFPRINTF(stderr, _TSK_T("Invalid argument: %s\n"),
                argv[OPTIND]);
            usage();
        case _TSK_T('b'):
            ssize = (unsigned int) TSTRTOUL(OPTARG, &cp, 0);
            if (*cp || *cp == *OPTARG || ssize < 1) {
                TFPRINTF(stderr,
                    _TSK_T
                    ("invalid argument: sector size must be positive: %s\n"),
                    OPTARG);
                usage();
            }
            break;
        case _TSK_T('f'):
            if (TSTRCMP(OPTARG, _TSK_T("list")) == 0) {
                tsk_fs_type_print(stderr);
                exit(1);
            }
            fstype = tsk_fs_type_toid(OPTARG);
            if (fstype == TSK_FS_TYPE_UNSUPP) {
                TFPRINTF(stderr,
                    _TSK_T("Unsupported file system type: %s\n"), OPTARG);
                usage();
            }
            break;
        case _TSK_T('h'):
            fw_flags |= TSK_FS_FILE_WALK_FLAG_NOSPARSE;
            break;
        case _TSK_T('i'):
            if (TSTRCMP(OPTARG, _TSK_T("list")) == 0) {
                tsk_img_type_print(stderr);
                exit(1);
            }
            imgtype = tsk_img_type_toid(OPTARG);
            if (imgtype == TSK_IMG_TYPE_UNSUPP) {
                TFPRINTF(stderr, _TSK_T("Unsupported image type: %s\n"),
                    OPTARG);
                usage();
            }
            break;
        case _TSK_T('k'):
            password = argv1[OPTIND - 1];
            break;
        case _TSK_T('o'):
            if ((imgaddr = tsk_parse_offset(OPTARG)) == -1) {
                tsk_error_print(stderr);
                exit(1);
            }
            break;
        case _TSK_T('P'):
            if (TSTRCMP(OPTARG, _TSK_T("list")) == 0) {
                tsk_pool_type_print(stderr);
                exit(1);
            }
            pooltype = tsk_pool_type_toid(OPTARG);
            if (pooltype == TSK_POOL_TYPE_UNSUPP) {
                TFPRINTF(stderr,
                    _TSK_T("Unsupported pool container type: %s\n"), OPTARG);
                usage();
            }
            break;
        case _TSK_T('B'):
            if ((pvol_block = tsk_parse_offset(OPTARG)) == -1) {
                tsk_error_print(stderr);
                exit(1);
            }
            break;
        case _TSK_T('S'):
            if ((snap_id = tsk_parse_offset(OPTARG)) == -1) {
                tsk_error_print(stderr);
                exit(1);
            }
            break;
        case _TSK_T('r'):
            // this is no longer needed, so we silently ignore it.
            break;
        case _TSK_T('R'):
            suppress_recover_error = 1;
            break;
        case _TSK_T('s'):
            fw_flags |= TSK_FS_FILE_WALK_FLAG_SLACK;
            break;
        case _TSK_T('v'):
            tsk_verbose++;
            break;
        case _TSK_T('V'):
            tsk_version_print(stdout);
            exit(0);
        }
    }

    /* We need at least two more argument */
    if (OPTIND + 1 >= argc) {
        tsk_fprintf(stderr, "Missing image name and/or address\n");
        usage();
    }

    /* Passwords only work if the file system type has been specified */
    if (strlen(password) > 0 && fstype == TSK_FS_TYPE_DETECT) {
        tsk_fprintf(stderr, "File system type must be specified to use a password\n");
        usage();
    }

    /* Get the inode address */
    if (tsk_fs_parse_inum(argv[argc - 1], &inum, &type, &type_used, &id,
            &id_used)) {
        TFPRINTF(stderr, _TSK_T("Invalid inode address: %s\n"),
            argv[argc - 1]);
        usage();
    }

    if ((img =
            tsk_img_open(argc - OPTIND - 1, &argv[OPTIND],
                imgtype, ssize)) == NULL) {
        tsk_error_print(stderr);
        exit(1);
    }
    if ((imgaddr * img->sector_size) >= img->size) {
        tsk_fprintf(stderr,
            "Sector offset supplied is larger than disk image (maximum: %"
            PRIu64 ")\n", img->size / img->sector_size);
        exit(1);
    }

    if (pvol_block == 0) {
        if ((fs = tsk_fs_open_img_decrypt(img, imgaddr * img->sector_size, 
                                          fstype, password)) == NULL) {
            tsk_error_print(stderr);
            if (tsk_error_get_errno() == TSK_ERR_FS_UNSUPTYPE)
                tsk_fs_type_print(stderr);
            tsk_img_close(img);
            exit(1);
        }
    } else {
        const TSK_POOL_INFO *pool = tsk_pool_open_img_sing(img, imgaddr * img->sector_size, pooltype);
        if (pool == NULL) {
            tsk_error_print(stderr);
            if (tsk_error_get_errno() == TSK_ERR_FS_UNSUPTYPE)
                tsk_pool_type_print(stderr);
            tsk_img_close(img);
            exit(1);
        }

        img = pool->get_img_info(pool, (TSK_DADDR_T)pvol_block);
        if ((fs = tsk_fs_open_img_decrypt(img, imgaddr * img->sector_size, fstype, password)) == NULL) {
            tsk_error_print(stderr);
            if (tsk_error_get_errno() == TSK_ERR_FS_UNSUPTYPE)
                tsk_fs_type_print(stderr);
            tsk_img_close(img);
            exit(1);
        }
    }

    if (inum > fs->last_inum) {
        tsk_fprintf(stderr,
            "Metadata address too large for image (%" PRIuINUM ")\n",
            fs->last_inum);
        tsk_fs_close(fs);
        tsk_img_close(img);
        exit(1);
    }
    if (inum < fs->first_inum) {
        tsk_fprintf(stderr,
            "Metadata address too small for image (%" PRIuINUM ")\n",
            fs->first_inum);
        tsk_fs_close(fs);
        tsk_img_close(img);
        exit(1);
    }

    if (snap_id > 0) {
        tsk_apfs_set_snapshot(fs, (uint64_t)snap_id);
    }

    retval =
        tsk_fs_icat(fs, inum, type, type_used, id, id_used,
        (TSK_FS_FILE_WALK_FLAG_ENUM) fw_flags);
    if (retval) {
        if ((suppress_recover_error == 1)
            && (tsk_error_get_errno() == TSK_ERR_FS_RECOVER)) {
            tsk_error_reset();
        }
        else {
            tsk_error_print(stderr);
            tsk_fs_close(fs);
            tsk_img_close(img);
            exit(1);
        }
    }
    tsk_fs_close(fs);
    tsk_img_close(img);
    exit(0);
}