1 /* 2 * Copyright (c) 2019 Conrad Meyer <cem@FreeBSD.org>. All rights reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 1. Redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer. 9 * 2. Redistributions in binary form must reproduce the above copyright 10 * notice, this list of conditions and the following disclaimer in the 11 * documentation and/or other materials provided with the distribution. 12 * 13 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 14 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 16 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 17 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 18 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 19 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 20 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 21 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 22 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 23 * SUCH DAMAGE. 24 */ 25 26 #include <sys/cdefs.h> 27 #include <assert.h> 28 #include <err.h> 29 #include <errno.h> 30 #include <stdbool.h> 31 #include <stdint.h> 32 #include <stdio.h> 33 #include <stdlib.h> 34 #include <string.h> 35 36 #include "fstyp.h" 37 38 /* 39 * https://developer.apple.com/library/archive/technotes/tn/tn1150.html 40 */ 41 42 #define VOL_HDR_OFF 1024 43 44 typedef uint32_t hfsp_cat_nodeid; 45 46 typedef struct hfsp_ext_desc { 47 uint32_t ex_startBlock; 48 uint32_t ex_blockCount; 49 } hfsp_ext_desc; 50 51 typedef struct hfsp_fork_data { 52 uint64_t fd_logicalSz; 53 uint32_t fd_clumpSz; 54 uint32_t fd_totalBlocks; 55 hfsp_ext_desc fd_extents[8]; 56 } hfsp_fork_data; 57 58 struct hfsp_vol_hdr { 59 char hp_signature[2]; 60 uint16_t hp_version; 61 uint32_t hp_attributes; 62 uint32_t hp_lastMounted; 63 uint32_t hp_journalInfoBlock; 64 65 /* Creation / etc dates. */ 66 uint32_t hp_create; 67 uint32_t hp_modify; 68 uint32_t hp_backup; 69 uint32_t hp_checked; 70 71 /* Stats */ 72 uint32_t hp_files; 73 uint32_t hp_folders; 74 75 /* Parameters */ 76 uint32_t hp_blockSize; 77 uint32_t hp_totalBlocks; 78 uint32_t hp_freeBlocks; 79 80 uint32_t hp_nextAlloc; 81 uint32_t hp_rsrcClumpSz; 82 uint32_t hp_dataClumpSz; 83 84 hfsp_cat_nodeid hp_nextCatID; 85 86 uint32_t hp_writeCount; 87 uint64_t hp_encodingsBM; 88 89 uint32_t hp_finderInfo[8]; 90 91 hfsp_fork_data hp_allocationFile; 92 hfsp_fork_data hp_extentsFile; 93 hfsp_fork_data hp_catalogFile; 94 hfsp_fork_data hp_attributesFile; 95 hfsp_fork_data hp_startupFile; 96 }; 97 _Static_assert(sizeof(struct hfsp_vol_hdr) == 512, ""); 98 99 int 100 fstyp_hfsp(FILE *fp, char *label, size_t size) 101 { 102 struct hfsp_vol_hdr *hdr; 103 int retval; 104 105 retval = 1; 106 hdr = read_buf(fp, VOL_HDR_OFF, sizeof(*hdr)); 107 if (hdr == NULL) 108 goto fail; 109 110 if ((strncmp(hdr->hp_signature, "H+", 2) != 0 || hdr->hp_version != 4) 111 && 112 (strncmp(hdr->hp_signature, "HX", 2) != 0 || hdr->hp_version != 5)) 113 goto fail; 114 115 /* This is an HFS+ volume. */ 116 retval = 0; 117 118 /* No label support yet. */ 119 (void)size; 120 (void)label; 121 122 fail: 123 free(hdr); 124 return (retval); 125 } 126