forked from Qortal/Brooklyn
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
314 lines
8.2 KiB
314 lines
8.2 KiB
// SPDX-License-Identifier: GPL-2.0+ |
|
/* |
|
* Copyright 2011 Calxeda, Inc. |
|
*/ |
|
|
|
#include <common.h> |
|
#include <linux/ctype.h> |
|
#include <errno.h> |
|
#include <common.h> |
|
#include <asm/io.h> |
|
#include <part_efi.h> |
|
#include <malloc.h> |
|
|
|
/* |
|
* UUID - Universally Unique IDentifier - 128 bits unique number. |
|
* There are 5 versions and one variant of UUID defined by RFC4122 |
|
* specification. A UUID contains a set of fields. The set varies |
|
* depending on the version of the UUID, as shown below: |
|
* - time, MAC address(v1), |
|
* - user ID(v2), |
|
* - MD5 of name or URL(v3), |
|
* - random data(v4), |
|
* - SHA-1 of name or URL(v5), |
|
* |
|
* Layout of UUID: |
|
* timestamp - 60-bit: time_low, time_mid, time_hi_and_version |
|
* version - 4 bit (bit 4 through 7 of the time_hi_and_version) |
|
* clock seq - 14 bit: clock_seq_hi_and_reserved, clock_seq_low |
|
* variant: - bit 6 and 7 of clock_seq_hi_and_reserved |
|
* node - 48 bit |
|
* |
|
* source: https://www.ietf.org/rfc/rfc4122.txt |
|
* |
|
* UUID binary format (16 bytes): |
|
* |
|
* 4B-2B-2B-2B-6B (big endian - network byte order) |
|
* |
|
* UUID string is 36 length of characters (36 bytes): |
|
* |
|
* 0 9 14 19 24 |
|
* xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx |
|
* be be be be be |
|
* |
|
* where x is a hexadecimal character. Fields are separated by '-'s. |
|
* When converting to a binary UUID, le means the field should be converted |
|
* to little endian and be means it should be converted to big endian. |
|
* |
|
* UUID is also used as GUID (Globally Unique Identifier) with the same binary |
|
* format but it differs in string format like below. |
|
* |
|
* GUID: |
|
* 0 9 14 19 24 |
|
* xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx |
|
* le le le be be |
|
* |
|
* GUID is used e.g. in GPT (GUID Partition Table) as a partiions unique id. |
|
*/ |
|
int uuid_str_valid(const char *uuid) |
|
{ |
|
int i, valid; |
|
|
|
if (uuid == NULL) |
|
return 0; |
|
|
|
for (i = 0, valid = 1; uuid[i] && valid; i++) { |
|
switch (i) { |
|
case 8: case 13: case 18: case 23: |
|
valid = (uuid[i] == '-'); |
|
break; |
|
default: |
|
valid = isxdigit(uuid[i]); |
|
break; |
|
} |
|
} |
|
|
|
if (i != UUID_STR_LEN || !valid) |
|
return 0; |
|
|
|
return 1; |
|
} |
|
|
|
#ifdef CONFIG_PARTITION_TYPE_GUID |
|
static const struct { |
|
const char *string; |
|
efi_guid_t guid; |
|
} list_guid[] = { |
|
{"system", PARTITION_SYSTEM_GUID}, |
|
{"mbr", LEGACY_MBR_PARTITION_GUID}, |
|
{"msft", PARTITION_MSFT_RESERVED_GUID}, |
|
{"data", PARTITION_BASIC_DATA_GUID}, |
|
{"linux", PARTITION_LINUX_FILE_SYSTEM_DATA_GUID}, |
|
{"raid", PARTITION_LINUX_RAID_GUID}, |
|
{"swap", PARTITION_LINUX_SWAP_GUID}, |
|
{"lvm", PARTITION_LINUX_LVM_GUID} |
|
}; |
|
|
|
/* |
|
* uuid_guid_get_bin() - this function get GUID bin for string |
|
* |
|
* @param guid_str - pointer to partition type string |
|
* @param guid_bin - pointer to allocated array for big endian output [16B] |
|
*/ |
|
int uuid_guid_get_bin(const char *guid_str, unsigned char *guid_bin) |
|
{ |
|
int i; |
|
|
|
for (i = 0; i < ARRAY_SIZE(list_guid); i++) { |
|
if (!strcmp(list_guid[i].string, guid_str)) { |
|
memcpy(guid_bin, &list_guid[i].guid, 16); |
|
return 0; |
|
} |
|
} |
|
return -ENODEV; |
|
} |
|
|
|
/* |
|
* uuid_guid_get_str() - this function get string for GUID. |
|
* |
|
* @param guid_bin - pointer to string with partition type guid [16B] |
|
* @param guid_str - pointer to allocated partition type string [7B] |
|
*/ |
|
int uuid_guid_get_str(unsigned char *guid_bin, char *guid_str) |
|
{ |
|
int i; |
|
|
|
*guid_str = 0; |
|
for (i = 0; i < ARRAY_SIZE(list_guid); i++) { |
|
if (!memcmp(list_guid[i].guid.b, guid_bin, 16)) { |
|
strcpy(guid_str, list_guid[i].string); |
|
return 0; |
|
} |
|
} |
|
return -ENODEV; |
|
} |
|
#endif |
|
|
|
/* |
|
* uuid_str_to_bin() - convert string UUID or GUID to big endian binary data. |
|
* |
|
* @param uuid_str - pointer to UUID or GUID string [37B] or GUID shorcut |
|
* @param uuid_bin - pointer to allocated array for big endian output [16B] |
|
* @str_format - UUID string format: 0 - UUID; 1 - GUID |
|
*/ |
|
int uuid_str_to_bin(char *uuid_str, unsigned char *uuid_bin, int str_format) |
|
{ |
|
uint16_t tmp16; |
|
uint32_t tmp32; |
|
uint64_t tmp64; |
|
|
|
if (!uuid_str_valid(uuid_str)) { |
|
#ifdef CONFIG_PARTITION_TYPE_GUID |
|
if (!uuid_guid_get_bin(uuid_str, uuid_bin)) |
|
return 0; |
|
#endif |
|
return -EINVAL; |
|
} |
|
|
|
if (str_format == UUID_STR_FORMAT_STD) { |
|
tmp32 = cpu_to_be32(simple_strtoul(uuid_str, NULL, 16)); |
|
memcpy(uuid_bin, &tmp32, 4); |
|
|
|
tmp16 = cpu_to_be16(simple_strtoul(uuid_str + 9, NULL, 16)); |
|
memcpy(uuid_bin + 4, &tmp16, 2); |
|
|
|
tmp16 = cpu_to_be16(simple_strtoul(uuid_str + 14, NULL, 16)); |
|
memcpy(uuid_bin + 6, &tmp16, 2); |
|
} else { |
|
tmp32 = cpu_to_le32(simple_strtoul(uuid_str, NULL, 16)); |
|
memcpy(uuid_bin, &tmp32, 4); |
|
|
|
tmp16 = cpu_to_le16(simple_strtoul(uuid_str + 9, NULL, 16)); |
|
memcpy(uuid_bin + 4, &tmp16, 2); |
|
|
|
tmp16 = cpu_to_le16(simple_strtoul(uuid_str + 14, NULL, 16)); |
|
memcpy(uuid_bin + 6, &tmp16, 2); |
|
} |
|
|
|
tmp16 = cpu_to_be16(simple_strtoul(uuid_str + 19, NULL, 16)); |
|
memcpy(uuid_bin + 8, &tmp16, 2); |
|
|
|
tmp64 = cpu_to_be64(simple_strtoull(uuid_str + 24, NULL, 16)); |
|
memcpy(uuid_bin + 10, (char *)&tmp64 + 2, 6); |
|
|
|
return 0; |
|
} |
|
|
|
/* |
|
* uuid_bin_to_str() - convert big endian binary data to string UUID or GUID. |
|
* |
|
* @param uuid_bin - pointer to binary data of UUID (big endian) [16B] |
|
* @param uuid_str - pointer to allocated array for output string [37B] |
|
* @str_format - UUID string format: 0 - UUID; 1 - GUID |
|
*/ |
|
void uuid_bin_to_str(unsigned char *uuid_bin, char *uuid_str, int str_format) |
|
{ |
|
const u8 uuid_char_order[UUID_BIN_LEN] = {0, 1, 2, 3, 4, 5, 6, 7, 8, |
|
9, 10, 11, 12, 13, 14, 15}; |
|
const u8 guid_char_order[UUID_BIN_LEN] = {3, 2, 1, 0, 5, 4, 7, 6, 8, |
|
9, 10, 11, 12, 13, 14, 15}; |
|
const u8 *char_order; |
|
int i; |
|
|
|
/* |
|
* UUID and GUID bin data - always in big endian: |
|
* 4B-2B-2B-2B-6B |
|
* be be be be be |
|
*/ |
|
if (str_format == UUID_STR_FORMAT_STD) |
|
char_order = uuid_char_order; |
|
else |
|
char_order = guid_char_order; |
|
|
|
for (i = 0; i < 16; i++) { |
|
sprintf(uuid_str, "%02x", uuid_bin[char_order[i]]); |
|
uuid_str += 2; |
|
switch (i) { |
|
case 3: |
|
case 5: |
|
case 7: |
|
case 9: |
|
*uuid_str++ = '-'; |
|
break; |
|
} |
|
} |
|
} |
|
|
|
/* |
|
* gen_rand_uuid() - this function generates a random binary UUID version 4. |
|
* In this version all fields beside 4 bits of version and |
|
* 2 bits of variant are randomly generated. |
|
* |
|
* @param uuid_bin - pointer to allocated array [16B]. Output is in big endian. |
|
*/ |
|
#if defined(CONFIG_RANDOM_UUID) || defined(CONFIG_CMD_UUID) |
|
void gen_rand_uuid(unsigned char *uuid_bin) |
|
{ |
|
struct uuid uuid; |
|
unsigned int *ptr = (unsigned int *)&uuid; |
|
int i; |
|
|
|
/* Set all fields randomly */ |
|
for (i = 0; i < sizeof(struct uuid) / sizeof(*ptr); i++) |
|
*(ptr + i) = cpu_to_be32(rand()); |
|
|
|
clrsetbits_be16(&uuid.time_hi_and_version, |
|
UUID_VERSION_MASK, |
|
UUID_VERSION << UUID_VERSION_SHIFT); |
|
|
|
clrsetbits_8(&uuid.clock_seq_hi_and_reserved, |
|
UUID_VARIANT_MASK, |
|
UUID_VARIANT << UUID_VARIANT_SHIFT); |
|
|
|
memcpy(uuid_bin, &uuid, sizeof(struct uuid)); |
|
} |
|
|
|
/* |
|
* gen_rand_uuid_str() - this function generates UUID v4 (random) in two string |
|
* formats UUID or GUID. |
|
* |
|
* @param uuid_str - pointer to allocated array [37B]. |
|
* @param - uuid output type: UUID - 0, GUID - 1 |
|
*/ |
|
void gen_rand_uuid_str(char *uuid_str, int str_format) |
|
{ |
|
unsigned char uuid_bin[UUID_BIN_LEN]; |
|
|
|
/* Generate UUID (big endian) */ |
|
gen_rand_uuid(uuid_bin); |
|
|
|
/* Convert UUID bin to UUID or GUID formated STRING */ |
|
uuid_bin_to_str(uuid_bin, uuid_str, str_format); |
|
} |
|
|
|
#ifdef CONFIG_CMD_UUID |
|
int do_uuid(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) |
|
{ |
|
char uuid[UUID_STR_LEN + 1]; |
|
int str_format; |
|
|
|
if (!strcmp(argv[0], "uuid")) |
|
str_format = UUID_STR_FORMAT_STD; |
|
else |
|
str_format = UUID_STR_FORMAT_GUID; |
|
|
|
if (argc > 2) |
|
return CMD_RET_USAGE; |
|
|
|
gen_rand_uuid_str(uuid, str_format); |
|
|
|
if (argc == 1) |
|
printf("%s\n", uuid); |
|
else |
|
env_set(argv[1], uuid); |
|
|
|
return CMD_RET_SUCCESS; |
|
} |
|
|
|
U_BOOT_CMD(uuid, CONFIG_SYS_MAXARGS, 1, do_uuid, |
|
"UUID - generate random Universally Unique Identifier", |
|
"[<varname>]\n" |
|
"Argument:\n" |
|
"varname: for set result in a environment variable\n" |
|
"e.g. uuid uuid_env" |
|
); |
|
|
|
U_BOOT_CMD(guid, CONFIG_SYS_MAXARGS, 1, do_uuid, |
|
"GUID - generate Globally Unique Identifier based on random UUID", |
|
"[<varname>]\n" |
|
"Argument:\n" |
|
"varname: for set result in a environment variable\n" |
|
"e.g. guid guid_env" |
|
); |
|
#endif /* CONFIG_CMD_UUID */ |
|
#endif /* CONFIG_RANDOM_UUID || CONFIG_CMD_UUID */
|
|
|