gpt_uuid.c revision 1.10.2.3
1 1.10.2.3 martin /* $NetBSD: gpt_uuid.c,v 1.10.2.3 2018/08/13 16:12:12 martin 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 1.10.2.3 martin __RCSID("$NetBSD: gpt_uuid.c,v 1.10.2.3 2018/08/13 16:12:12 martin 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 1.10.2.3 martin #include "gpt_private.h" 46 1.10.2.2 snj 47 1.10.2.2 snj #if defined(HAVE_SYS_ENDIAN_H) || ! defined(HAVE_NBTOOL_CONFIG_H) 48 1.10.2.2 snj #include <sys/endian.h> 49 1.10.2.2 snj #endif 50 1.10.2.2 snj 51 1.10.2.2 snj 52 1.10.2.2 snj const gpt_uuid_t gpt_uuid_nil; 53 1.10.2.2 snj 54 1.10.2.2 snj struct dce_uuid { 55 1.10.2.2 snj uint32_t time_low; 56 1.10.2.2 snj uint16_t time_mid; 57 1.10.2.2 snj uint16_t time_hi_and_version; 58 1.10.2.2 snj uint8_t clock_seq_hi_and_reserved; 59 1.10.2.2 snj uint8_t clock_seq_low; 60 1.10.2.2 snj uint8_t node[6]; 61 1.10.2.2 snj }; 62 1.10.2.2 snj 63 1.10.2.2 snj static const struct { 64 1.10.2.2 snj struct dce_uuid u; 65 1.10.2.2 snj const char *n; 66 1.10.2.2 snj const char *d; 67 1.10.2.2 snj } gpt_nv[] = { 68 1.10.2.2 snj { GPT_ENT_TYPE_APPLE_HFS, "apple", "Apple HFS" }, 69 1.10.2.2 snj { GPT_ENT_TYPE_APPLE_UFS, "apple-ufs", "Apple UFS" }, 70 1.10.2.2 snj { GPT_ENT_TYPE_BIOS, "bios", "BIOS Boot" }, 71 1.10.2.2 snj { GPT_ENT_TYPE_EFI, "efi", "EFI System" }, 72 1.10.2.2 snj { GPT_ENT_TYPE_FREEBSD, "fbsd-legacy", "FreeBSD legacy" }, 73 1.10.2.2 snj { GPT_ENT_TYPE_FREEBSD_SWAP, "fbsd-swap", "FreeBSD swap" }, 74 1.10.2.2 snj { GPT_ENT_TYPE_FREEBSD_UFS, "fbsd-ufs", "FreeBSD UFS/UFS2" }, 75 1.10.2.2 snj { GPT_ENT_TYPE_FREEBSD_VINUM, "fbsd-vinum", "FreeBSD vinum" }, 76 1.10.2.2 snj { GPT_ENT_TYPE_FREEBSD_ZFS, "fbsd-zfs", "FreeBSD ZFS" }, 77 1.10.2.2 snj { GPT_ENT_TYPE_LINUX_DATA, "linux-data", "Linux data" }, 78 1.10.2.2 snj { GPT_ENT_TYPE_LINUX_RAID, "linux-raid", "Linux RAID" }, 79 1.10.2.2 snj { GPT_ENT_TYPE_LINUX_SWAP, "linux-swap", "Linux swap" }, 80 1.10.2.2 snj { GPT_ENT_TYPE_LINUX_LVM, "linux-lvm", "Linux LVM" }, 81 1.10.2.2 snj { GPT_ENT_TYPE_MS_BASIC_DATA, "windows", "Windows basic data" }, 82 1.10.2.2 snj { GPT_ENT_TYPE_MS_RESERVED, "windows-reserved", "Windows reserved" }, 83 1.10.2.2 snj { GPT_ENT_TYPE_NETBSD_CCD, "ccd", "NetBSD ccd component" }, 84 1.10.2.2 snj { GPT_ENT_TYPE_NETBSD_CGD, "cgd", "NetBSD Cryptographic Disk" }, 85 1.10.2.2 snj { GPT_ENT_TYPE_NETBSD_FFS, "ffs", "NetBSD FFSv1/FFSv2" }, 86 1.10.2.2 snj { GPT_ENT_TYPE_NETBSD_LFS, "lfs", "NetBSD LFS" }, 87 1.10.2.2 snj { GPT_ENT_TYPE_NETBSD_RAIDFRAME, "raid", 88 1.10.2.2 snj "NetBSD RAIDFrame component" }, 89 1.10.2.2 snj { GPT_ENT_TYPE_NETBSD_SWAP, "swap", "NetBSD swap" }, 90 1.10.2.2 snj }; 91 1.10.2.2 snj 92 1.10.2.2 snj static void 93 1.10.2.2 snj gpt_uuid_to_dce(const gpt_uuid_t buf, struct dce_uuid *uuid) 94 1.10.2.2 snj { 95 1.10.2.2 snj const uint8_t *p = buf; 96 1.10.2.2 snj size_t i; 97 1.10.2.2 snj 98 1.10.2.2 snj uuid->time_low = le32dec(p); 99 1.10.2.2 snj uuid->time_mid = le16dec(p + 4); 100 1.10.2.2 snj uuid->time_hi_and_version = le16dec(p + 6); 101 1.10.2.2 snj uuid->clock_seq_hi_and_reserved = p[8]; 102 1.10.2.2 snj uuid->clock_seq_low = p[9]; 103 1.10.2.2 snj for (i = 0; i < sizeof(uuid->node); i++) 104 1.10.2.2 snj uuid->node[i] = p[10 + i]; 105 1.10.2.2 snj } 106 1.10.2.2 snj 107 1.10.2.2 snj static void 108 1.10.2.2 snj gpt_dce_to_uuid(const struct dce_uuid *uuid, uint8_t *buf) 109 1.10.2.2 snj { 110 1.10.2.2 snj uint8_t *p = buf; 111 1.10.2.2 snj size_t i; 112 1.10.2.2 snj 113 1.10.2.2 snj le32enc(p, uuid->time_low); 114 1.10.2.2 snj le16enc(p + 4, uuid->time_mid); 115 1.10.2.2 snj le16enc(p + 6, uuid->time_hi_and_version); 116 1.10.2.2 snj p[8] = uuid->clock_seq_hi_and_reserved; 117 1.10.2.2 snj p[9] = uuid->clock_seq_low; 118 1.10.2.2 snj for (i = 0; i < sizeof(uuid->node); i++) 119 1.10.2.2 snj p[10 + i] = uuid->node[i]; 120 1.10.2.2 snj } 121 1.10.2.2 snj 122 1.10.2.2 snj static int 123 1.10.2.2 snj gpt_uuid_numeric(char *buf, size_t bufsiz, const struct dce_uuid *u) 124 1.10.2.2 snj { 125 1.10.2.2 snj return snprintf(buf, bufsiz, 126 1.10.2.2 snj "%08x-%04x-%04x-%02x%02x-%02x%02x%02x%02x%02x%02x", 127 1.10.2.2 snj u->time_low, u->time_mid, u->time_hi_and_version, 128 1.10.2.2 snj u->clock_seq_hi_and_reserved, u->clock_seq_low, u->node[0], 129 1.10.2.2 snj u->node[1], u->node[2], u->node[3], u->node[4], u->node[5]); 130 1.10.2.2 snj } 131 1.10.2.2 snj 132 1.10.2.2 snj 133 1.10.2.2 snj static int 134 1.10.2.2 snj gpt_uuid_symbolic(char *buf, size_t bufsiz, const struct dce_uuid *u) 135 1.10.2.2 snj { 136 1.10.2.2 snj size_t i; 137 1.10.2.2 snj 138 1.10.2.2 snj for (i = 0; i < __arraycount(gpt_nv); i++) 139 1.10.2.2 snj if (memcmp(&gpt_nv[i].u, u, sizeof(*u)) == 0) 140 1.10.2.3 martin return (int)strlcpy(buf, gpt_nv[i].n, bufsiz); 141 1.10.2.2 snj return -1; 142 1.10.2.2 snj } 143 1.10.2.2 snj 144 1.10.2.2 snj static int 145 1.10.2.2 snj gpt_uuid_descriptive(char *buf, size_t bufsiz, const struct dce_uuid *u) 146 1.10.2.2 snj { 147 1.10.2.2 snj size_t i; 148 1.10.2.2 snj 149 1.10.2.2 snj for (i = 0; i < __arraycount(gpt_nv); i++) 150 1.10.2.2 snj if (memcmp(&gpt_nv[i].u, u, sizeof(*u)) == 0) 151 1.10.2.3 martin return (int)strlcpy(buf, gpt_nv[i].d, bufsiz); 152 1.10.2.2 snj return -1; 153 1.10.2.2 snj } 154 1.10.2.2 snj 155 1.10.2.2 snj int 156 1.10.2.2 snj gpt_uuid_snprintf(char *buf, size_t bufsiz, const char *fmt, 157 1.10.2.2 snj const gpt_uuid_t uu) 158 1.10.2.2 snj { 159 1.10.2.2 snj struct dce_uuid u; 160 1.10.2.2 snj gpt_uuid_to_dce(uu, &u); 161 1.10.2.2 snj 162 1.10.2.2 snj if (fmt[1] == 's') { 163 1.10.2.2 snj int r; 164 1.10.2.2 snj if ((r = gpt_uuid_symbolic(buf, bufsiz, &u)) != -1) 165 1.10.2.2 snj return r; 166 1.10.2.2 snj } 167 1.10.2.2 snj if (fmt[1] == 'l') { 168 1.10.2.2 snj int r; 169 1.10.2.2 snj if ((r = gpt_uuid_descriptive(buf, bufsiz, &u)) != -1) 170 1.10.2.2 snj return r; 171 1.10.2.2 snj } 172 1.10.2.2 snj return gpt_uuid_numeric(buf, bufsiz, &u); 173 1.10.2.2 snj } 174 1.10.2.2 snj 175 1.10.2.2 snj static int 176 1.10.2.2 snj gpt_uuid_parse_numeric(const char *s, struct dce_uuid *u) 177 1.10.2.2 snj { 178 1.10.2.2 snj int n; 179 1.10.2.2 snj 180 1.10.2.2 snj if (s == NULL || *s == '\0') { 181 1.10.2.2 snj memset(u, 0, sizeof(*u)); 182 1.10.2.2 snj return 0; 183 1.10.2.2 snj } 184 1.10.2.2 snj 185 1.10.2.2 snj n = sscanf(s, 186 1.10.2.2 snj "%8x-%4hx-%4hx-%2hhx%2hhx-%2hhx%2hhx%2hhx%2hhx%2hhx%2hhx", 187 1.10.2.2 snj &u->time_low, &u->time_mid, &u->time_hi_and_version, 188 1.10.2.2 snj &u->clock_seq_hi_and_reserved, &u->clock_seq_low, &u->node[0], 189 1.10.2.2 snj &u->node[1], &u->node[2], &u->node[3], &u->node[4], &u->node[5]); 190 1.10.2.2 snj 191 1.10.2.2 snj /* Make sure we have all conversions. */ 192 1.10.2.2 snj if (n != 11) 193 1.10.2.2 snj return -1; 194 1.10.2.2 snj 195 1.10.2.2 snj /* We have a successful scan. Check semantics... */ 196 1.10.2.2 snj n = u->clock_seq_hi_and_reserved; 197 1.10.2.2 snj if ((n & 0x80) != 0x00 && /* variant 0? */ 198 1.10.2.2 snj (n & 0xc0) != 0x80 && /* variant 1? */ 199 1.10.2.2 snj (n & 0xe0) != 0xc0) /* variant 2? */ 200 1.10.2.2 snj return -1; 201 1.10.2.2 snj return 0; 202 1.10.2.2 snj } 203 1.10.2.2 snj 204 1.10.2.2 snj static int 205 1.10.2.2 snj gpt_uuid_parse_symbolic(const char *s, struct dce_uuid *u) 206 1.10.2.2 snj { 207 1.10.2.2 snj size_t i; 208 1.10.2.2 snj 209 1.10.2.2 snj for (i = 0; i < __arraycount(gpt_nv); i++) 210 1.10.2.2 snj if (strcmp(gpt_nv[i].n, s) == 0) { 211 1.10.2.2 snj *u = gpt_nv[i].u; 212 1.10.2.2 snj return 0; 213 1.10.2.2 snj } 214 1.10.2.2 snj return -1; 215 1.10.2.2 snj } 216 1.10.2.2 snj 217 1.10.2.2 snj int 218 1.10.2.2 snj gpt_uuid_parse(const char *s, gpt_uuid_t uuid) 219 1.10.2.2 snj { 220 1.10.2.2 snj struct dce_uuid u; 221 1.10.2.2 snj 222 1.10.2.2 snj if (gpt_uuid_parse_numeric(s, &u) != -1) { 223 1.10.2.2 snj gpt_dce_to_uuid(&u, uuid); 224 1.10.2.2 snj return 0; 225 1.10.2.2 snj } 226 1.10.2.2 snj 227 1.10.2.2 snj if (gpt_uuid_parse_symbolic(s, &u) == -1) 228 1.10.2.2 snj return -1; 229 1.10.2.2 snj 230 1.10.2.2 snj gpt_dce_to_uuid(&u, uuid); 231 1.10.2.2 snj return 0; 232 1.10.2.2 snj } 233 1.10.2.2 snj 234 1.10.2.2 snj void 235 1.10.2.3 martin gpt_uuid_help(const char *prefix) 236 1.10.2.3 martin { 237 1.10.2.3 martin size_t i; 238 1.10.2.3 martin 239 1.10.2.3 martin for (i = 0; i < __arraycount(gpt_nv); i++) 240 1.10.2.3 martin printf("%s%18.18s\t%s\n", prefix, gpt_nv[i].n, gpt_nv[i].d); 241 1.10.2.3 martin } 242 1.10.2.3 martin 243 1.10.2.3 martin void 244 1.10.2.2 snj gpt_uuid_create(gpt_type_t t, gpt_uuid_t u, uint16_t *b, size_t s) 245 1.10.2.2 snj { 246 1.10.2.2 snj gpt_dce_to_uuid(&gpt_nv[t].u, u); 247 1.10.2.2 snj if (b) 248 1.10.2.2 snj utf8_to_utf16((const uint8_t *)gpt_nv[t].d, b, s / sizeof(*b)); 249 1.10.2.2 snj } 250 1.10.2.2 snj 251 1.10.2.3 martin static int 252 1.10.2.3 martin gpt_uuid_random(gpt_t gpt, void *v, size_t n) 253 1.10.2.2 snj { 254 1.10.2.2 snj int fd; 255 1.10.2.2 snj uint8_t *p; 256 1.10.2.2 snj ssize_t nread; 257 1.10.2.2 snj 258 1.10.2.2 snj /* Randomly generate the content. */ 259 1.10.2.2 snj fd = open("/dev/urandom", O_RDONLY | O_CLOEXEC); 260 1.10.2.3 martin if (fd == -1) { 261 1.10.2.3 martin gpt_warn(gpt, "Can't open `/dev/urandom'"); 262 1.10.2.3 martin return -1; 263 1.10.2.3 martin } 264 1.10.2.3 martin for (p = v; n > 0; p += nread, n -= (size_t)nread) { 265 1.10.2.2 snj nread = read(fd, p, n); 266 1.10.2.3 martin if (nread < 0) { 267 1.10.2.3 martin gpt_warn(gpt, "Can't read `/dev/urandom'"); 268 1.10.2.3 martin goto out; 269 1.10.2.3 martin } 270 1.10.2.3 martin if (nread == 0) { 271 1.10.2.3 martin gpt_warn(gpt, "EOF from /dev/urandom"); 272 1.10.2.3 martin goto out; 273 1.10.2.3 martin } 274 1.10.2.3 martin if ((size_t)nread > n) { 275 1.10.2.3 martin gpt_warnx(gpt, "read too much: %zd > %zu", nread, n); 276 1.10.2.3 martin goto out; 277 1.10.2.3 martin } 278 1.10.2.2 snj } 279 1.10.2.2 snj (void)close(fd); 280 1.10.2.3 martin return 0; 281 1.10.2.3 martin out: 282 1.10.2.3 martin (void)close(fd); 283 1.10.2.3 martin return -1; 284 1.10.2.3 martin } 285 1.10.2.3 martin 286 1.10.2.3 martin static int 287 1.10.2.3 martin gpt_uuid_tstamp(gpt_t gpt, void *v, size_t l) 288 1.10.2.3 martin { 289 1.10.2.3 martin uint8_t *p; 290 1.10.2.3 martin // Perhaps use SHA? 291 1.10.2.3 martin uint32_t x = (uint32_t)gpt->timestamp; 292 1.10.2.3 martin 293 1.10.2.3 martin for (p = v; l > 0; p += sizeof(x), l -= sizeof(x)) 294 1.10.2.3 martin memcpy(p, &x, sizeof(x)); 295 1.10.2.3 martin 296 1.10.2.3 martin return 0; 297 1.10.2.3 martin } 298 1.10.2.3 martin 299 1.10.2.3 martin int 300 1.10.2.3 martin gpt_uuid_generate(gpt_t gpt, gpt_uuid_t t) 301 1.10.2.3 martin { 302 1.10.2.3 martin int rv; 303 1.10.2.3 martin struct dce_uuid u; 304 1.10.2.3 martin if (gpt->flags & GPT_TIMESTAMP) 305 1.10.2.3 martin rv = gpt_uuid_tstamp(gpt, &u, sizeof(u)); 306 1.10.2.3 martin else 307 1.10.2.3 martin rv = gpt_uuid_random(gpt, &u, sizeof(u)); 308 1.10.2.3 martin 309 1.10.2.3 martin if (rv == -1) 310 1.10.2.3 martin return -1; 311 1.10.2.2 snj 312 1.10.2.2 snj /* Set the version number to 4. */ 313 1.10.2.3 martin u.time_hi_and_version &= (uint16_t)~0xf000; 314 1.10.2.2 snj u.time_hi_and_version |= 0x4000; 315 1.10.2.2 snj 316 1.10.2.2 snj /* Fix the reserved bits. */ 317 1.10.2.3 martin u.clock_seq_hi_and_reserved &= (uint8_t)~0x40; 318 1.10.2.2 snj u.clock_seq_hi_and_reserved |= 0x80; 319 1.10.2.2 snj 320 1.10.2.2 snj gpt_dce_to_uuid(&u, t); 321 1.10.2.3 martin return 0; 322 1.10.2.2 snj } 323
Indexes created Thu Oct 02 14:10:14 GMT 2025