diff options
Diffstat (limited to 'lib/uuid.c')
| -rw-r--r-- | lib/uuid.c | 83 |
1 files changed, 59 insertions, 24 deletions
@@ -7,8 +7,9 @@ #include <linux/ctype.h> #include <errno.h> #include <common.h> - -#define UUID_STR_LEN 36 +#include <asm/io.h> +#include <part_efi.h> +#include <malloc.h> /* * UUID - Universally Unique IDentifier - 128 bits unique number. @@ -40,7 +41,6 @@ * * 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; @@ -59,57 +59,92 @@ int uuid_str_valid(const char *uuid) } } - if (i != 36 || !valid) + if (i != UUID_STR_LEN || !valid) return 0; return 1; } -int uuid_str_to_bin(char *uuid, unsigned char *out) +/* + * uuid_str_to_bin() - convert string UUID or GUID to big endian binary data. + * + * @param uuid_str - pointer to UUID or GUID string [37B] + * @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 || !out) + if (!uuid_str_valid(uuid_str)) return -EINVAL; - if (strlen(uuid) != UUID_STR_LEN) - return -EINVAL; + if (str_format == UUID_STR_FORMAT_STD) { + tmp32 = cpu_to_be32(simple_strtoul(uuid_str, NULL, 16)); + memcpy(uuid_bin, &tmp32, 4); - tmp32 = cpu_to_le32(simple_strtoul(uuid, NULL, 16)); - memcpy(out, &tmp32, 4); + tmp16 = cpu_to_be16(simple_strtoul(uuid_str + 9, NULL, 16)); + memcpy(uuid_bin + 4, &tmp16, 2); - tmp16 = cpu_to_le16(simple_strtoul(uuid + 9, NULL, 16)); - memcpy(out + 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 + 14, NULL, 16)); - memcpy(out + 6, &tmp16, 2); + tmp16 = cpu_to_le16(simple_strtoul(uuid_str + 9, NULL, 16)); + memcpy(uuid_bin + 4, &tmp16, 2); - tmp16 = cpu_to_be16(simple_strtoul(uuid + 19, NULL, 16)); - memcpy(out + 8, &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 + 24, NULL, 16)); - memcpy(out + 10, (char *)&tmp64 + 2, 6); + tmp64 = cpu_to_be64(simple_strtoull(uuid_str + 24, NULL, 16)); + memcpy(uuid_bin + 10, (char *)&tmp64 + 2, 6); return 0; } -void uuid_bin_to_str(unsigned char *uuid, char *str) +/* + * 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) { - static const u8 le[16] = {3, 2, 1, 0, 5, 4, 7, 6, 8, 9, 10, 11, - 12, 13, 14, 15}; + 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(str, "%02x", uuid[le[i]]); - str += 2; + sprintf(uuid_str, "%02x", uuid_bin[char_order[i]]); + uuid_str += 2; switch (i) { case 3: case 5: case 7: case 9: - *str++ = '-'; + *uuid_str++ = '-'; break; } } |