gpt_uuid.c revision 1.10.2.2
1 1.10.2.2 snj /* $NetBSD: gpt_uuid.c,v 1.10.2.2 2015/06/02 19:49:38 snj Exp $ */ 2 1.10.2.2 snj 3 1.10.2.2 snj /*- 4 1.10.2.2 snj * Copyright (c) 2014 The NetBSD Foundation, Inc. 5 1.10.2.2 snj * All rights reserved. 6 1.10.2.2 snj * 7 1.10.2.2 snj * Redistribution and use in source and binary forms, with or without 8 1.10.2.2 snj * modification, are permitted provided that the following conditions 9 1.10.2.2 snj * are met: 10 1.10.2.2 snj * 1. Redistributions of source code must retain the above copyright 11 1.10.2.2 snj * notice, this list of conditions and the following disclaimer. 12 1.10.2.2 snj * 2. Redistributions in binary form must reproduce the above copyright 13 1.10.2.2 snj * notice, this list of conditions and the following disclaimer in the 14 1.10.2.2 snj * documentation and/or other materials provided with the distribution. 15 1.10.2.2 snj * 16 1.10.2.2 snj * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 17 1.10.2.2 snj * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 18 1.10.2.2 snj * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 19 1.10.2.2 snj * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 20 1.10.2.2 snj * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 21 1.10.2.2 snj * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 22 1.10.2.2 snj * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 23 1.10.2.2 snj * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 24 1.10.2.2 snj * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 25 1.10.2.2 snj * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 26 1.10.2.2 snj * POSSIBILITY OF SUCH DAMAGE. 27 1.10.2.2 snj */ 28 1.10.2.2 snj 29 1.10.2.2 snj #if HAVE_NBTOOL_CONFIG_H 30 1.10.2.2 snj #include "nbtool_config.h" 31 1.10.2.2 snj #endif 32 1.10.2.2 snj 33 1.10.2.2 snj #include <sys/cdefs.h> 34 1.10.2.2 snj #ifdef __RCSID 35 1.10.2.2 snj __RCSID("$NetBSD: gpt_uuid.c,v 1.10.2.2 2015/06/02 19:49:38 snj Exp $"); 36 1.10.2.2 snj #endif 37 1.10.2.2 snj 38 1.10.2.2 snj #include <err.h> 39 1.10.2.2 snj #include <fcntl.h> 40 1.10.2.2 snj #include <stdio.h> 41 1.10.2.2 snj #include <unistd.h> 42 1.10.2.2 snj 43 1.10.2.2 snj #include "map.h" 44 1.10.2.2 snj #include "gpt.h" 45 1.10.2.2 snj 46 1.10.2.2 snj #if defined(HAVE_SYS_ENDIAN_H) || ! defined(HAVE_NBTOOL_CONFIG_H) 47 1.10.2.2 snj #include <sys/endian.h> 48 1.10.2.2 snj #endif 49 1.10.2.2 snj 50 1.10.2.2 snj 51 1.10.2.2 snj const gpt_uuid_t gpt_uuid_nil; 52 1.10.2.2 snj 53 1.10.2.2 snj struct dce_uuid { 54 1.10.2.2 snj uint32_t time_low; 55 1.10.2.2 snj uint16_t time_mid; 56 1.10.2.2 snj uint16_t time_hi_and_version; 57 1.10.2.2 snj uint8_t clock_seq_hi_and_reserved; 58 1.10.2.2 snj uint8_t clock_seq_low; 59 1.10.2.2 snj uint8_t node[6]; 60 1.10.2.2 snj }; 61 1.10.2.2 snj 62 1.10.2.2 snj static const struct { 63 1.10.2.2 snj struct dce_uuid u; 64 1.10.2.2 snj const char *n; 65 1.10.2.2 snj const char *d; 66 1.10.2.2 snj } gpt_nv[] = { 67 1.10.2.2 snj { GPT_ENT_TYPE_APPLE_HFS, "apple", "Apple HFS" }, 68 1.10.2.2 snj { GPT_ENT_TYPE_APPLE_UFS, "apple-ufs", "Apple UFS" }, 69 1.10.2.2 snj { GPT_ENT_TYPE_BIOS, "bios", "BIOS Boot" }, 70 1.10.2.2 snj { GPT_ENT_TYPE_EFI, "efi", "EFI System" }, 71 1.10.2.2 snj { GPT_ENT_TYPE_FREEBSD, "fbsd-legacy", "FreeBSD legacy" }, 72 1.10.2.2 snj { GPT_ENT_TYPE_FREEBSD_SWAP, "fbsd-swap", "FreeBSD swap" }, 73 1.10.2.2 snj { GPT_ENT_TYPE_FREEBSD_UFS, "fbsd-ufs", "FreeBSD UFS/UFS2" }, 74 1.10.2.2 snj { GPT_ENT_TYPE_FREEBSD_VINUM, "fbsd-vinum", "FreeBSD vinum" }, 75 1.10.2.2 snj { GPT_ENT_TYPE_FREEBSD_ZFS, "fbsd-zfs", "FreeBSD ZFS" }, 76 1.10.2.2 snj { GPT_ENT_TYPE_LINUX_DATA, "linux-data", "Linux data" }, 77 1.10.2.2 snj { GPT_ENT_TYPE_LINUX_RAID, "linux-raid", "Linux RAID" }, 78 1.10.2.2 snj { GPT_ENT_TYPE_LINUX_SWAP, "linux-swap", "Linux swap" }, 79 1.10.2.2 snj { GPT_ENT_TYPE_LINUX_LVM, "linux-lvm", "Linux LVM" }, 80 1.10.2.2 snj { GPT_ENT_TYPE_MS_BASIC_DATA, "windows", "Windows basic data" }, 81 1.10.2.2 snj { GPT_ENT_TYPE_MS_RESERVED, "windows-reserved", "Windows reserved" }, 82 1.10.2.2 snj { GPT_ENT_TYPE_NETBSD_CCD, "ccd", "NetBSD ccd component" }, 83 1.10.2.2 snj { GPT_ENT_TYPE_NETBSD_CGD, "cgd", "NetBSD Cryptographic Disk" }, 84 1.10.2.2 snj { GPT_ENT_TYPE_NETBSD_FFS, "ffs", "NetBSD FFSv1/FFSv2" }, 85 1.10.2.2 snj { GPT_ENT_TYPE_NETBSD_LFS, "lfs", "NetBSD LFS" }, 86 1.10.2.2 snj { GPT_ENT_TYPE_NETBSD_RAIDFRAME, "raid", 87 1.10.2.2 snj "NetBSD RAIDFrame component" }, 88 1.10.2.2 snj { GPT_ENT_TYPE_NETBSD_SWAP, "swap", "NetBSD swap" }, 89 1.10.2.2 snj }; 90 1.10.2.2 snj 91 1.10.2.2 snj static void 92 1.10.2.2 snj gpt_uuid_to_dce(const gpt_uuid_t buf, struct dce_uuid *uuid) 93 1.10.2.2 snj { 94 1.10.2.2 snj const uint8_t *p = buf; 95 1.10.2.2 snj size_t i; 96 1.10.2.2 snj 97 1.10.2.2 snj uuid->time_low = le32dec(p); 98 1.10.2.2 snj uuid->time_mid = le16dec(p + 4); 99 1.10.2.2 snj uuid->time_hi_and_version = le16dec(p + 6); 100 1.10.2.2 snj uuid->clock_seq_hi_and_reserved = p[8]; 101 1.10.2.2 snj uuid->clock_seq_low = p[9]; 102 1.10.2.2 snj for (i = 0; i < sizeof(uuid->node); i++) 103 1.10.2.2 snj uuid->node[i] = p[10 + i]; 104 1.10.2.2 snj } 105 1.10.2.2 snj 106 1.10.2.2 snj static void 107 1.10.2.2 snj gpt_dce_to_uuid(const struct dce_uuid *uuid, uint8_t *buf) 108 1.10.2.2 snj { 109 1.10.2.2 snj uint8_t *p = buf; 110 1.10.2.2 snj size_t i; 111 1.10.2.2 snj 112 1.10.2.2 snj le32enc(p, uuid->time_low); 113 1.10.2.2 snj le16enc(p + 4, uuid->time_mid); 114 1.10.2.2 snj le16enc(p + 6, uuid->time_hi_and_version); 115 1.10.2.2 snj p[8] = uuid->clock_seq_hi_and_reserved; 116 1.10.2.2 snj p[9] = uuid->clock_seq_low; 117 1.10.2.2 snj for (i = 0; i < sizeof(uuid->node); i++) 118 1.10.2.2 snj p[10 + i] = uuid->node[i]; 119 1.10.2.2 snj } 120 1.10.2.2 snj 121 1.10.2.2 snj static int 122 1.10.2.2 snj gpt_uuid_numeric(char *buf, size_t bufsiz, const struct dce_uuid *u) 123 1.10.2.2 snj { 124 1.10.2.2 snj return snprintf(buf, bufsiz, 125 1.10.2.2 snj "%08x-%04x-%04x-%02x%02x-%02x%02x%02x%02x%02x%02x", 126 1.10.2.2 snj u->time_low, u->time_mid, u->time_hi_and_version, 127 1.10.2.2 snj u->clock_seq_hi_and_reserved, u->clock_seq_low, u->node[0], 128 1.10.2.2 snj u->node[1], u->node[2], u->node[3], u->node[4], u->node[5]); 129 1.10.2.2 snj } 130 1.10.2.2 snj 131 1.10.2.2 snj 132 1.10.2.2 snj static int 133 1.10.2.2 snj gpt_uuid_symbolic(char *buf, size_t bufsiz, const struct dce_uuid *u) 134 1.10.2.2 snj { 135 1.10.2.2 snj size_t i; 136 1.10.2.2 snj 137 1.10.2.2 snj for (i = 0; i < __arraycount(gpt_nv); i++) 138 1.10.2.2 snj if (memcmp(&gpt_nv[i].u, u, sizeof(*u)) == 0) 139 1.10.2.2 snj return strlcpy(buf, gpt_nv[i].n, bufsiz); 140 1.10.2.2 snj return -1; 141 1.10.2.2 snj } 142 1.10.2.2 snj 143 1.10.2.2 snj static int 144 1.10.2.2 snj gpt_uuid_descriptive(char *buf, size_t bufsiz, const struct dce_uuid *u) 145 1.10.2.2 snj { 146 1.10.2.2 snj size_t i; 147 1.10.2.2 snj 148 1.10.2.2 snj for (i = 0; i < __arraycount(gpt_nv); i++) 149 1.10.2.2 snj if (memcmp(&gpt_nv[i].u, u, sizeof(*u)) == 0) 150 1.10.2.2 snj return strlcpy(buf, gpt_nv[i].d, bufsiz); 151 1.10.2.2 snj return -1; 152 1.10.2.2 snj } 153 1.10.2.2 snj 154 1.10.2.2 snj int 155 1.10.2.2 snj gpt_uuid_snprintf(char *buf, size_t bufsiz, const char *fmt, 156 1.10.2.2 snj const gpt_uuid_t uu) 157 1.10.2.2 snj { 158 1.10.2.2 snj struct dce_uuid u; 159 1.10.2.2 snj gpt_uuid_to_dce(uu, &u); 160 1.10.2.2 snj 161 1.10.2.2 snj if (fmt[1] == 's') { 162 1.10.2.2 snj int r; 163 1.10.2.2 snj if ((r = gpt_uuid_symbolic(buf, bufsiz, &u)) != -1) 164 1.10.2.2 snj return r; 165 1.10.2.2 snj } 166 1.10.2.2 snj if (fmt[1] == 'l') { 167 1.10.2.2 snj int r; 168 1.10.2.2 snj if ((r = gpt_uuid_descriptive(buf, bufsiz, &u)) != -1) 169 1.10.2.2 snj return r; 170 1.10.2.2 snj } 171 1.10.2.2 snj return gpt_uuid_numeric(buf, bufsiz, &u); 172 1.10.2.2 snj } 173 1.10.2.2 snj 174 1.10.2.2 snj static int 175 1.10.2.2 snj gpt_uuid_parse_numeric(const char *s, struct dce_uuid *u) 176 1.10.2.2 snj { 177 1.10.2.2 snj int n; 178 1.10.2.2 snj 179 1.10.2.2 snj if (s == NULL || *s == '\0') { 180 1.10.2.2 snj memset(u, 0, sizeof(*u)); 181 1.10.2.2 snj return 0; 182 1.10.2.2 snj } 183 1.10.2.2 snj 184 1.10.2.2 snj n = sscanf(s, 185 1.10.2.2 snj "%8x-%4hx-%4hx-%2hhx%2hhx-%2hhx%2hhx%2hhx%2hhx%2hhx%2hhx", 186 1.10.2.2 snj &u->time_low, &u->time_mid, &u->time_hi_and_version, 187 1.10.2.2 snj &u->clock_seq_hi_and_reserved, &u->clock_seq_low, &u->node[0], 188 1.10.2.2 snj &u->node[1], &u->node[2], &u->node[3], &u->node[4], &u->node[5]); 189 1.10.2.2 snj 190 1.10.2.2 snj /* Make sure we have all conversions. */ 191 1.10.2.2 snj if (n != 11) 192 1.10.2.2 snj return -1; 193 1.10.2.2 snj 194 1.10.2.2 snj /* We have a successful scan. Check semantics... */ 195 1.10.2.2 snj n = u->clock_seq_hi_and_reserved; 196 1.10.2.2 snj if ((n & 0x80) != 0x00 && /* variant 0? */ 197 1.10.2.2 snj (n & 0xc0) != 0x80 && /* variant 1? */ 198 1.10.2.2 snj (n & 0xe0) != 0xc0) /* variant 2? */ 199 1.10.2.2 snj return -1; 200 1.10.2.2 snj return 0; 201 1.10.2.2 snj } 202 1.10.2.2 snj 203 1.10.2.2 snj static int 204 1.10.2.2 snj gpt_uuid_parse_symbolic(const char *s, struct dce_uuid *u) 205 1.10.2.2 snj { 206 1.10.2.2 snj size_t i; 207 1.10.2.2 snj 208 1.10.2.2 snj for (i = 0; i < __arraycount(gpt_nv); i++) 209 1.10.2.2 snj if (strcmp(gpt_nv[i].n, s) == 0) { 210 1.10.2.2 snj *u = gpt_nv[i].u; 211 1.10.2.2 snj return 0; 212 1.10.2.2 snj } 213 1.10.2.2 snj return -1; 214 1.10.2.2 snj } 215 1.10.2.2 snj 216 1.10.2.2 snj int 217 1.10.2.2 snj gpt_uuid_parse(const char *s, gpt_uuid_t uuid) 218 1.10.2.2 snj { 219 1.10.2.2 snj struct dce_uuid u; 220 1.10.2.2 snj 221 1.10.2.2 snj if (gpt_uuid_parse_numeric(s, &u) != -1) { 222 1.10.2.2 snj gpt_dce_to_uuid(&u, uuid); 223 1.10.2.2 snj return 0; 224 1.10.2.2 snj } 225 1.10.2.2 snj 226 1.10.2.2 snj if (gpt_uuid_parse_symbolic(s, &u) == -1) 227 1.10.2.2 snj return -1; 228 1.10.2.2 snj 229 1.10.2.2 snj gpt_dce_to_uuid(&u, uuid); 230 1.10.2.2 snj return 0; 231 1.10.2.2 snj } 232 1.10.2.2 snj 233 1.10.2.2 snj void 234 1.10.2.2 snj gpt_uuid_create(gpt_type_t t, gpt_uuid_t u, uint16_t *b, size_t s) 235 1.10.2.2 snj { 236 1.10.2.2 snj gpt_dce_to_uuid(&gpt_nv[t].u, u); 237 1.10.2.2 snj if (b) 238 1.10.2.2 snj utf8_to_utf16((const uint8_t *)gpt_nv[t].d, b, s / sizeof(*b)); 239 1.10.2.2 snj } 240 1.10.2.2 snj 241 1.10.2.2 snj void 242 1.10.2.2 snj gpt_uuid_generate(gpt_uuid_t t) 243 1.10.2.2 snj { 244 1.10.2.2 snj struct dce_uuid u; 245 1.10.2.2 snj int fd; 246 1.10.2.2 snj uint8_t *p; 247 1.10.2.2 snj size_t n; 248 1.10.2.2 snj ssize_t nread; 249 1.10.2.2 snj 250 1.10.2.2 snj /* Randomly generate the content. */ 251 1.10.2.2 snj fd = open("/dev/urandom", O_RDONLY | O_CLOEXEC); 252 1.10.2.2 snj if (fd == -1) 253 1.10.2.2 snj err(1, "open(/dev/urandom)"); 254 1.10.2.2 snj for (p = (void *)&u, n = sizeof u; 0 < n; p += nread, n -= nread) { 255 1.10.2.2 snj nread = read(fd, p, n); 256 1.10.2.2 snj if (nread < 0) 257 1.10.2.2 snj err(1, "read(/dev/urandom)"); 258 1.10.2.2 snj if (nread == 0) 259 1.10.2.2 snj errx(1, "EOF from /dev/urandom"); 260 1.10.2.2 snj if ((size_t)nread > n) 261 1.10.2.2 snj errx(1, "read too much: %zd > %zu", nread, n); 262 1.10.2.2 snj } 263 1.10.2.2 snj (void)close(fd); 264 1.10.2.2 snj 265 1.10.2.2 snj /* Set the version number to 4. */ 266 1.10.2.2 snj u.time_hi_and_version &= ~(uint32_t)0xf000; 267 1.10.2.2 snj u.time_hi_and_version |= 0x4000; 268 1.10.2.2 snj 269 1.10.2.2 snj /* Fix the reserved bits. */ 270 1.10.2.2 snj u.clock_seq_hi_and_reserved &= ~(uint8_t)0x40; 271 1.10.2.2 snj u.clock_seq_hi_and_reserved |= 0x80; 272 1.10.2.2 snj 273 1.10.2.2 snj gpt_dce_to_uuid(&u, t); 274 1.10.2.2 snj } 275
Indexes created Thu Oct 02 14:10:14 GMT 2025