1 // SPDX-License-Identifier: GPL-2.0+
3 * Copyright 2011 Calxeda, Inc.
13 #include <linux/ctype.h>
19 #include <dm/uclass.h>
23 * UUID - Universally Unique IDentifier - 128 bits unique number.
24 * There are 5 versions and one variant of UUID defined by RFC4122
25 * specification. A UUID contains a set of fields. The set varies
26 * depending on the version of the UUID, as shown below:
27 * - time, MAC address(v1),
29 * - MD5 of name or URL(v3),
31 * - SHA-1 of name or URL(v5),
34 * timestamp - 60-bit: time_low, time_mid, time_hi_and_version
35 * version - 4 bit (bit 4 through 7 of the time_hi_and_version)
36 * clock seq - 14 bit: clock_seq_hi_and_reserved, clock_seq_low
37 * variant: - bit 6 and 7 of clock_seq_hi_and_reserved
40 * source: https://www.ietf.org/rfc/rfc4122.txt
42 * UUID binary format (16 bytes):
44 * 4B-2B-2B-2B-6B (big endian - network byte order)
46 * UUID string is 36 length of characters (36 bytes):
49 * xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx
52 * where x is a hexadecimal character. Fields are separated by '-'s.
53 * When converting to a binary UUID, le means the field should be converted
54 * to little endian and be means it should be converted to big endian.
56 * UUID is also used as GUID (Globally Unique Identifier) with the same binary
57 * format but it differs in string format like below.
61 * xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx
64 * GUID is used e.g. in GPT (GUID Partition Table) as a partiions unique id.
66 int uuid_str_valid(const char *uuid)
73 for (i = 0, valid = 1; uuid[i] && valid; i++) {
75 case 8: case 13: case 18: case 23:
76 valid = (uuid[i] == '-');
79 valid = isxdigit(uuid[i]);
84 if (i != UUID_STR_LEN || !valid)
94 #ifdef CONFIG_PARTITION_TYPE_GUID
95 {"system", PARTITION_SYSTEM_GUID},
96 {"mbr", LEGACY_MBR_PARTITION_GUID},
97 {"msft", PARTITION_MSFT_RESERVED_GUID},
98 {"data", PARTITION_BASIC_DATA_GUID},
99 {"linux", PARTITION_LINUX_FILE_SYSTEM_DATA_GUID},
100 {"raid", PARTITION_LINUX_RAID_GUID},
101 {"swap", PARTITION_LINUX_SWAP_GUID},
102 {"lvm", PARTITION_LINUX_LVM_GUID},
103 {"u-boot-env", PARTITION_U_BOOT_ENVIRONMENT},
105 #ifdef CONFIG_CMD_EFIDEBUG
108 EFI_DEVICE_PATH_PROTOCOL_GUID,
111 "Device Path To Text",
112 EFI_DEVICE_PATH_TO_TEXT_PROTOCOL_GUID,
115 "Device Path Utilities",
116 EFI_DEVICE_PATH_UTILITIES_PROTOCOL_GUID,
119 "Unicode Collation 2",
120 EFI_UNICODE_COLLATION_PROTOCOL2_GUID,
124 EFI_DRIVER_BINDING_PROTOCOL_GUID,
128 EFI_SIMPLE_TEXT_INPUT_PROTOCOL_GUID,
131 "Simple Text Input Ex",
132 EFI_SIMPLE_TEXT_INPUT_EX_PROTOCOL_GUID,
135 "Simple Text Output",
136 EFI_SIMPLE_TEXT_OUTPUT_PROTOCOL_GUID,
140 EFI_BLOCK_IO_PROTOCOL_GUID,
143 "Simple File System",
144 EFI_SIMPLE_FILE_SYSTEM_PROTOCOL_GUID,
148 EFI_LOADED_IMAGE_PROTOCOL_GUID,
152 EFI_GRAPHICS_OUTPUT_PROTOCOL_GUID,
156 EFI_HII_STRING_PROTOCOL_GUID,
160 EFI_HII_DATABASE_PROTOCOL_GUID,
163 "HII Config Routing",
164 EFI_HII_CONFIG_ROUTING_PROTOCOL_GUID,
168 EFI_LOAD_FILE2_PROTOCOL_GUID,
171 "Random Number Generator",
172 EFI_RNG_PROTOCOL_GUID,
176 EFI_SIMPLE_NETWORK_PROTOCOL_GUID,
180 EFI_PXE_BASE_CODE_PROTOCOL_GUID,
184 EFI_DT_FIXUP_PROTOCOL_GUID,
188 EFI_TCG2_PROTOCOL_GUID,
192 PARTITION_SYSTEM_GUID
195 "Firmware Management",
196 EFI_FIRMWARE_MANAGEMENT_PROTOCOL_GUID
198 /* Configuration table GUIDs */
204 "EFI System Resource Table",
205 EFI_SYSTEM_RESOURCE_TABLE_GUID,
216 "Runtime properties",
217 EFI_RT_PROPERTIES_TABLE_GUID,
220 "TCG2 Final Events Table",
221 EFI_TCG2_FINAL_EVENTS_TABLE_GUID,
224 "EFI Conformance Profiles Table",
225 EFI_CONFORMANCE_PROFILES_TABLE_GUID,
227 #ifdef CONFIG_EFI_RISCV_BOOT_PROTOCOL
230 RISCV_EFI_BOOT_PROTOCOL_GUID,
233 #endif /* CONFIG_CMD_EFIDEBUG */
234 #ifdef CONFIG_CMD_NVEDIT_EFI
235 /* signature database */
237 "EFI_GLOBAL_VARIABLE_GUID",
238 EFI_GLOBAL_VARIABLE_GUID,
241 "EFI_IMAGE_SECURITY_DATABASE_GUID",
242 EFI_IMAGE_SECURITY_DATABASE_GUID,
244 /* certificate types */
246 "EFI_CERT_SHA256_GUID",
247 EFI_CERT_SHA256_GUID,
250 "EFI_CERT_X509_GUID",
254 "EFI_CERT_TYPE_PKCS7_GUID",
255 EFI_CERT_TYPE_PKCS7_GUID,
261 * uuid_guid_get_bin() - this function get GUID bin for string
263 * @param guid_str - pointer to partition type string
264 * @param guid_bin - pointer to allocated array for big endian output [16B]
266 int uuid_guid_get_bin(const char *guid_str, unsigned char *guid_bin)
270 for (i = 0; i < ARRAY_SIZE(list_guid); i++) {
271 if (!strcmp(list_guid[i].string, guid_str)) {
272 memcpy(guid_bin, &list_guid[i].guid, 16);
280 * uuid_guid_get_str() - this function get string for GUID.
282 * @param guid_bin - pointer to string with partition type guid [16B]
284 * Returns NULL if the type GUID is not known.
286 const char *uuid_guid_get_str(const unsigned char *guid_bin)
290 for (i = 0; i < ARRAY_SIZE(list_guid); i++) {
291 if (!memcmp(list_guid[i].guid.b, guid_bin, 16)) {
292 return list_guid[i].string;
299 * uuid_str_to_bin() - convert string UUID or GUID to big endian binary data.
301 * @param uuid_str - pointer to UUID or GUID string [37B] or GUID shorcut
302 * @param uuid_bin - pointer to allocated array for big endian output [16B]
303 * @str_format - UUID string format: 0 - UUID; 1 - GUID
305 int uuid_str_to_bin(const char *uuid_str, unsigned char *uuid_bin,
312 if (!uuid_str_valid(uuid_str)) {
313 #ifdef CONFIG_PARTITION_TYPE_GUID
314 if (!uuid_guid_get_bin(uuid_str, uuid_bin))
320 if (str_format == UUID_STR_FORMAT_STD) {
321 tmp32 = cpu_to_be32(hextoul(uuid_str, NULL));
322 memcpy(uuid_bin, &tmp32, 4);
324 tmp16 = cpu_to_be16(hextoul(uuid_str + 9, NULL));
325 memcpy(uuid_bin + 4, &tmp16, 2);
327 tmp16 = cpu_to_be16(hextoul(uuid_str + 14, NULL));
328 memcpy(uuid_bin + 6, &tmp16, 2);
330 tmp32 = cpu_to_le32(hextoul(uuid_str, NULL));
331 memcpy(uuid_bin, &tmp32, 4);
333 tmp16 = cpu_to_le16(hextoul(uuid_str + 9, NULL));
334 memcpy(uuid_bin + 4, &tmp16, 2);
336 tmp16 = cpu_to_le16(hextoul(uuid_str + 14, NULL));
337 memcpy(uuid_bin + 6, &tmp16, 2);
340 tmp16 = cpu_to_be16(hextoul(uuid_str + 19, NULL));
341 memcpy(uuid_bin + 8, &tmp16, 2);
343 tmp64 = cpu_to_be64(simple_strtoull(uuid_str + 24, NULL, 16));
344 memcpy(uuid_bin + 10, (char *)&tmp64 + 2, 6);
350 * uuid_bin_to_str() - convert big endian binary data to string UUID or GUID.
352 * @param uuid_bin: pointer to binary data of UUID (big endian) [16B]
353 * @param uuid_str: pointer to allocated array for output string [37B]
354 * @str_format: bit 0: 0 - UUID; 1 - GUID
355 * bit 1: 0 - lower case; 2 - upper case
357 void uuid_bin_to_str(const unsigned char *uuid_bin, char *uuid_str,
360 const u8 uuid_char_order[UUID_BIN_LEN] = {0, 1, 2, 3, 4, 5, 6, 7, 8,
361 9, 10, 11, 12, 13, 14, 15};
362 const u8 guid_char_order[UUID_BIN_LEN] = {3, 2, 1, 0, 5, 4, 7, 6, 8,
363 9, 10, 11, 12, 13, 14, 15};
364 const u8 *char_order;
369 * UUID and GUID bin data - always in big endian:
373 if (str_format & UUID_STR_FORMAT_GUID)
374 char_order = guid_char_order;
376 char_order = uuid_char_order;
377 if (str_format & UUID_STR_UPPER_CASE)
382 for (i = 0; i < 16; i++) {
383 sprintf(uuid_str, format, uuid_bin[char_order[i]]);
397 * gen_rand_uuid() - this function generates a random binary UUID version 4.
398 * In this version all fields beside 4 bits of version and
399 * 2 bits of variant are randomly generated.
401 * @param uuid_bin - pointer to allocated array [16B]. Output is in big endian.
403 #if defined(CONFIG_RANDOM_UUID) || defined(CONFIG_CMD_UUID)
404 void gen_rand_uuid(unsigned char *uuid_bin)
407 struct uuid *uuid = (struct uuid *)ptr;
409 struct udevice *devp;
412 if (IS_ENABLED(CONFIG_DM_RNG)) {
413 ret = uclass_get_device(UCLASS_RNG, 0, &devp);
415 ret = dm_rng_read(devp, &randv, sizeof(randv));
423 srand(get_ticks() + rand());
425 /* Set all fields randomly */
426 for (i = 0; i < 4; i++)
429 clrsetbits_be16(&uuid->time_hi_and_version,
431 UUID_VERSION << UUID_VERSION_SHIFT);
433 clrsetbits_8(&uuid->clock_seq_hi_and_reserved,
435 UUID_VARIANT << UUID_VARIANT_SHIFT);
437 memcpy(uuid_bin, uuid, 16);
441 * gen_rand_uuid_str() - this function generates UUID v4 (random) in two string
442 * formats UUID or GUID.
444 * @param uuid_str - pointer to allocated array [37B].
445 * @param - uuid output type: UUID - 0, GUID - 1
447 void gen_rand_uuid_str(char *uuid_str, int str_format)
449 unsigned char uuid_bin[UUID_BIN_LEN];
451 /* Generate UUID (big endian) */
452 gen_rand_uuid(uuid_bin);
454 /* Convert UUID bin to UUID or GUID formated STRING */
455 uuid_bin_to_str(uuid_bin, uuid_str, str_format);
458 #if !defined(CONFIG_SPL_BUILD) && defined(CONFIG_CMD_UUID)
459 int do_uuid(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[])
461 char uuid[UUID_STR_LEN + 1];
464 if (!strcmp(argv[0], "uuid"))
465 str_format = UUID_STR_FORMAT_STD;
467 str_format = UUID_STR_FORMAT_GUID;
470 return CMD_RET_USAGE;
472 gen_rand_uuid_str(uuid, str_format);
475 printf("%s\n", uuid);
477 env_set(argv[1], uuid);
479 return CMD_RET_SUCCESS;
482 U_BOOT_CMD(uuid, CONFIG_SYS_MAXARGS, 1, do_uuid,
483 "UUID - generate random Universally Unique Identifier",
486 "varname: for set result in a environment variable\n"
490 U_BOOT_CMD(guid, CONFIG_SYS_MAXARGS, 1, do_uuid,
491 "GUID - generate Globally Unique Identifier based on random UUID",
494 "varname: for set result in a environment variable\n"
497 #endif /* CONFIG_CMD_UUID */
498 #endif /* CONFIG_RANDOM_UUID || CONFIG_CMD_UUID */