util/smmstoretool/guids.c

   1 /* SPDX-License-Identifier: GPL-2.0-or-later */
   2
   3 #include "guids.h"
   4
   5 #include <stdio.h>
   6 #include <string.h>
   7
   8 #include <commonlib/bsd/helpers.h>
   9
  10 #include "udk2017.h"
  11 #include "utils.h"
  12
  13 const struct guid_alias_t known_guids[] = {
  14         {
  15                 "coreboot",
  16                 {
  17                         0xceae4c1d, 0x335b, 0x4685,
  18                         { 0xa4, 0xa0, 0xfc, 0x4a, 0x94, 0xee, 0xa0, 0x85 }
  19                 },
  20         },
  21         {
  22                 "dasharo",
  23                 {
  24                         0xd15b327e, 0xff2d, 0x4fc1,
  25                         { 0xab, 0xf6, 0xc1, 0x2b, 0xd0, 0x8c, 0x13, 0x59 }
  26                 },
  27         },
  28         {
  29                 "global",
  30                 {
  31                         0x8be4df61, 0x93ca, 0x11d2,
  32                         { 0xaa, 0x0d, 0x00, 0xe0, 0x98, 0x03, 0x2b, 0x8c }
  33                 },
  34         },
  35         {
  36                 "microsoft",
  37                 {
  38                         0x77fa9abd, 0x0359, 0x4d32,
  39                         { 0xbd, 0x60, 0x28, 0xf4, 0xe7, 0x8f, 0x78, 0x4b }
  40                 },
  41         },
  42 };
  43
  44 const int known_guid_count = ARRAY_SIZE(known_guids);
  45
  46 char *format_guid(const EFI_GUID *guid, bool use_alias)
  47 {
  48         if (use_alias) {
  49                 for (int i = 0; i < known_guid_count; ++i) {
  50                         const struct guid_alias_t *known_guid = &known_guids[i];
  51                         if (memcmp(&known_guid->guid, guid, sizeof(*guid)) == 0)
  52                                 return strdup(known_guid->alias);
  53                 }
  54         }
  55
  56         char *str = xmalloc(GUID_LEN + 1);
  57         snprintf(str, GUID_LEN + 1,
  58                  "%08x-%04x-%04x-%02x%02x%02x%02x%02x%02x%02x%02x",
  59                  guid->Data1, guid->Data2, guid->Data3,
  60                  guid->Data4[0], guid->Data4[1],
  61                  guid->Data4[2], guid->Data4[3],
  62                  guid->Data4[4], guid->Data4[5],
  63                  guid->Data4[6], guid->Data4[7]);
  64         return str;
  65 }
  66
  67 bool parse_guid(const char str[], EFI_GUID *guid)
  68 {
  69         for (int i = 0; i < known_guid_count; ++i) {
  70                 const struct guid_alias_t *known_guid = &known_guids[i];
  71                 if (str_eq(known_guid->alias, str)) {
  72                         *guid = known_guid->guid;
  73                         return true;
  74                 }
  75         }
  76
  77         if (strlen(str) != GUID_LEN)
  78                 return false;
  79
  80         int n = sscanf(str,
  81                        "%08x-%04hx-%04hx-"
  82                        "%02hhx%02hhx%02hhx%02hhx%02hhx%02hhx%02hhx%02hhx",
  83                        &guid->Data1, &guid->Data2, &guid->Data3,
  84                        &guid->Data4[0], &guid->Data4[1],
  85                        &guid->Data4[2], &guid->Data4[3],
  86                        &guid->Data4[4], &guid->Data4[5],
  87                        &guid->Data4[6], &guid->Data4[7]);
  88         return n == 11;
  89 }