mirror of
https://github.com/brain-hackers/u-boot-brain
synced 2024-06-09 23:36:03 +09:00
83d290c56f
When U-Boot started using SPDX tags we were among the early adopters and there weren't a lot of other examples to borrow from. So we picked the area of the file that usually had a full license text and replaced it with an appropriate SPDX-License-Identifier: entry. Since then, the Linux Kernel has adopted SPDX tags and they place it as the very first line in a file (except where shebangs are used, then it's second line) and with slightly different comment styles than us. In part due to community overlap, in part due to better tag visibility and in part for other minor reasons, switch over to that style. This commit changes all instances where we have a single declared license in the tag as both the before and after are identical in tag contents. There's also a few places where I found we did not have a tag and have introduced one. Signed-off-by: Tom Rini <trini@konsulko.com>
315 lines
8.2 KiB
C
315 lines
8.2 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright 2011 Calxeda, Inc.
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*/
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#include <common.h>
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#include <linux/ctype.h>
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#include <errno.h>
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#include <common.h>
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#include <asm/io.h>
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#include <part_efi.h>
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#include <malloc.h>
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/*
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* UUID - Universally Unique IDentifier - 128 bits unique number.
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* There are 5 versions and one variant of UUID defined by RFC4122
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* specification. A UUID contains a set of fields. The set varies
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* depending on the version of the UUID, as shown below:
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* - time, MAC address(v1),
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* - user ID(v2),
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* - MD5 of name or URL(v3),
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* - random data(v4),
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* - SHA-1 of name or URL(v5),
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*
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* Layout of UUID:
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* timestamp - 60-bit: time_low, time_mid, time_hi_and_version
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* version - 4 bit (bit 4 through 7 of the time_hi_and_version)
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* clock seq - 14 bit: clock_seq_hi_and_reserved, clock_seq_low
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* variant: - bit 6 and 7 of clock_seq_hi_and_reserved
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* node - 48 bit
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*
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* source: https://www.ietf.org/rfc/rfc4122.txt
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*
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* UUID binary format (16 bytes):
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*
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* 4B-2B-2B-2B-6B (big endian - network byte order)
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*
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* UUID string is 36 length of characters (36 bytes):
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*
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* 0 9 14 19 24
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* xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx
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* be be be be be
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*
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* where x is a hexadecimal character. Fields are separated by '-'s.
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* When converting to a binary UUID, le means the field should be converted
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* to little endian and be means it should be converted to big endian.
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*
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* UUID is also used as GUID (Globally Unique Identifier) with the same binary
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* format but it differs in string format like below.
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*
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* GUID:
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* 0 9 14 19 24
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* xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx
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* le le le be be
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*
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* GUID is used e.g. in GPT (GUID Partition Table) as a partiions unique id.
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*/
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int uuid_str_valid(const char *uuid)
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{
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int i, valid;
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if (uuid == NULL)
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return 0;
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for (i = 0, valid = 1; uuid[i] && valid; i++) {
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switch (i) {
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case 8: case 13: case 18: case 23:
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valid = (uuid[i] == '-');
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break;
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default:
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valid = isxdigit(uuid[i]);
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break;
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}
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}
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if (i != UUID_STR_LEN || !valid)
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return 0;
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return 1;
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}
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#ifdef CONFIG_PARTITION_TYPE_GUID
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static const struct {
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const char *string;
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efi_guid_t guid;
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} list_guid[] = {
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{"system", PARTITION_SYSTEM_GUID},
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{"mbr", LEGACY_MBR_PARTITION_GUID},
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{"msft", PARTITION_MSFT_RESERVED_GUID},
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{"data", PARTITION_BASIC_DATA_GUID},
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{"linux", PARTITION_LINUX_FILE_SYSTEM_DATA_GUID},
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{"raid", PARTITION_LINUX_RAID_GUID},
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{"swap", PARTITION_LINUX_SWAP_GUID},
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{"lvm", PARTITION_LINUX_LVM_GUID}
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};
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/*
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* uuid_guid_get_bin() - this function get GUID bin for string
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*
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* @param guid_str - pointer to partition type string
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* @param guid_bin - pointer to allocated array for big endian output [16B]
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*/
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int uuid_guid_get_bin(const char *guid_str, unsigned char *guid_bin)
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{
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int i;
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for (i = 0; i < ARRAY_SIZE(list_guid); i++) {
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if (!strcmp(list_guid[i].string, guid_str)) {
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memcpy(guid_bin, &list_guid[i].guid, 16);
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return 0;
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}
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}
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return -ENODEV;
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}
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/*
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* uuid_guid_get_str() - this function get string for GUID.
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*
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* @param guid_bin - pointer to string with partition type guid [16B]
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* @param guid_str - pointer to allocated partition type string [7B]
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*/
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int uuid_guid_get_str(unsigned char *guid_bin, char *guid_str)
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{
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int i;
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*guid_str = 0;
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for (i = 0; i < ARRAY_SIZE(list_guid); i++) {
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if (!memcmp(list_guid[i].guid.b, guid_bin, 16)) {
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strcpy(guid_str, list_guid[i].string);
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return 0;
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}
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}
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return -ENODEV;
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}
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#endif
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/*
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* uuid_str_to_bin() - convert string UUID or GUID to big endian binary data.
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*
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* @param uuid_str - pointer to UUID or GUID string [37B] or GUID shorcut
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* @param uuid_bin - pointer to allocated array for big endian output [16B]
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* @str_format - UUID string format: 0 - UUID; 1 - GUID
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*/
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int uuid_str_to_bin(char *uuid_str, unsigned char *uuid_bin, int str_format)
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{
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uint16_t tmp16;
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uint32_t tmp32;
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uint64_t tmp64;
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if (!uuid_str_valid(uuid_str)) {
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#ifdef CONFIG_PARTITION_TYPE_GUID
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if (!uuid_guid_get_bin(uuid_str, uuid_bin))
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return 0;
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#endif
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return -EINVAL;
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}
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if (str_format == UUID_STR_FORMAT_STD) {
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tmp32 = cpu_to_be32(simple_strtoul(uuid_str, NULL, 16));
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memcpy(uuid_bin, &tmp32, 4);
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tmp16 = cpu_to_be16(simple_strtoul(uuid_str + 9, NULL, 16));
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memcpy(uuid_bin + 4, &tmp16, 2);
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tmp16 = cpu_to_be16(simple_strtoul(uuid_str + 14, NULL, 16));
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memcpy(uuid_bin + 6, &tmp16, 2);
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} else {
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tmp32 = cpu_to_le32(simple_strtoul(uuid_str, NULL, 16));
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memcpy(uuid_bin, &tmp32, 4);
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tmp16 = cpu_to_le16(simple_strtoul(uuid_str + 9, NULL, 16));
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memcpy(uuid_bin + 4, &tmp16, 2);
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tmp16 = cpu_to_le16(simple_strtoul(uuid_str + 14, NULL, 16));
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memcpy(uuid_bin + 6, &tmp16, 2);
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}
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tmp16 = cpu_to_be16(simple_strtoul(uuid_str + 19, NULL, 16));
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memcpy(uuid_bin + 8, &tmp16, 2);
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tmp64 = cpu_to_be64(simple_strtoull(uuid_str + 24, NULL, 16));
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memcpy(uuid_bin + 10, (char *)&tmp64 + 2, 6);
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return 0;
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}
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/*
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* uuid_bin_to_str() - convert big endian binary data to string UUID or GUID.
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*
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* @param uuid_bin - pointer to binary data of UUID (big endian) [16B]
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* @param uuid_str - pointer to allocated array for output string [37B]
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* @str_format - UUID string format: 0 - UUID; 1 - GUID
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*/
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void uuid_bin_to_str(unsigned char *uuid_bin, char *uuid_str, int str_format)
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{
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const u8 uuid_char_order[UUID_BIN_LEN] = {0, 1, 2, 3, 4, 5, 6, 7, 8,
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9, 10, 11, 12, 13, 14, 15};
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const u8 guid_char_order[UUID_BIN_LEN] = {3, 2, 1, 0, 5, 4, 7, 6, 8,
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9, 10, 11, 12, 13, 14, 15};
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const u8 *char_order;
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int i;
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/*
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* UUID and GUID bin data - always in big endian:
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* 4B-2B-2B-2B-6B
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* be be be be be
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*/
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if (str_format == UUID_STR_FORMAT_STD)
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char_order = uuid_char_order;
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else
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char_order = guid_char_order;
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for (i = 0; i < 16; i++) {
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sprintf(uuid_str, "%02x", uuid_bin[char_order[i]]);
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uuid_str += 2;
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switch (i) {
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case 3:
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case 5:
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case 7:
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case 9:
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*uuid_str++ = '-';
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break;
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}
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}
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}
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/*
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* gen_rand_uuid() - this function generates a random binary UUID version 4.
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* In this version all fields beside 4 bits of version and
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* 2 bits of variant are randomly generated.
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*
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* @param uuid_bin - pointer to allocated array [16B]. Output is in big endian.
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*/
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#if defined(CONFIG_RANDOM_UUID) || defined(CONFIG_CMD_UUID)
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void gen_rand_uuid(unsigned char *uuid_bin)
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{
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struct uuid uuid;
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unsigned int *ptr = (unsigned int *)&uuid;
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int i;
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/* Set all fields randomly */
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for (i = 0; i < sizeof(struct uuid) / sizeof(*ptr); i++)
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*(ptr + i) = cpu_to_be32(rand());
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clrsetbits_be16(&uuid.time_hi_and_version,
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UUID_VERSION_MASK,
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UUID_VERSION << UUID_VERSION_SHIFT);
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clrsetbits_8(&uuid.clock_seq_hi_and_reserved,
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UUID_VARIANT_MASK,
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UUID_VARIANT << UUID_VARIANT_SHIFT);
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memcpy(uuid_bin, &uuid, sizeof(struct uuid));
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}
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/*
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* gen_rand_uuid_str() - this function generates UUID v4 (random) in two string
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* formats UUID or GUID.
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*
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* @param uuid_str - pointer to allocated array [37B].
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* @param - uuid output type: UUID - 0, GUID - 1
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*/
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void gen_rand_uuid_str(char *uuid_str, int str_format)
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{
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unsigned char uuid_bin[UUID_BIN_LEN];
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/* Generate UUID (big endian) */
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gen_rand_uuid(uuid_bin);
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/* Convert UUID bin to UUID or GUID formated STRING */
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uuid_bin_to_str(uuid_bin, uuid_str, str_format);
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}
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#ifdef CONFIG_CMD_UUID
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int do_uuid(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
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{
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char uuid[UUID_STR_LEN + 1];
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int str_format;
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if (!strcmp(argv[0], "uuid"))
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str_format = UUID_STR_FORMAT_STD;
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else
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str_format = UUID_STR_FORMAT_GUID;
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if (argc > 2)
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return CMD_RET_USAGE;
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gen_rand_uuid_str(uuid, str_format);
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if (argc == 1)
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printf("%s\n", uuid);
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else
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env_set(argv[1], uuid);
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return CMD_RET_SUCCESS;
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}
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U_BOOT_CMD(uuid, CONFIG_SYS_MAXARGS, 1, do_uuid,
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"UUID - generate random Universally Unique Identifier",
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"[<varname>]\n"
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"Argument:\n"
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"varname: for set result in a environment variable\n"
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"e.g. uuid uuid_env"
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);
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U_BOOT_CMD(guid, CONFIG_SYS_MAXARGS, 1, do_uuid,
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"GUID - generate Globally Unique Identifier based on random UUID",
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"[<varname>]\n"
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"Argument:\n"
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"varname: for set result in a environment variable\n"
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"e.g. guid guid_env"
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);
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#endif /* CONFIG_CMD_UUID */
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#endif /* CONFIG_RANDOM_UUID || CONFIG_CMD_UUID */
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