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  }