1 /*
2  * Copyright (c) 2021 Omar Polo <op@omarpolo.com>
3  *
4  * Permission to use, copy, modify, and distribute this software for any
5  * purpose with or without fee is hereby granted, provided that the above
6  * copyright notice and this permission notice appear in all copies.
7  *
8  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
9  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
10  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
11  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
12  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
13  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
14  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
15  */
16 
17 #include "compat.h"
18 
19 #include <stdlib.h>
20 #include <string.h>
21 
22 #include "telescope.h"
23 
24 void
25 tofu_init(struct ohash *h, unsigned int sz, ptrdiff_t ko)
26 {
27 	struct ohash_info info = {
28 		.key_offset = ko,
29 		.calloc = hash_calloc,
30 		.free = hash_free,
31 		.alloc = hash_alloc,
32 	};
33 
34 	ohash_init(h, sz, &info);
35 }
36 
37 struct tofu_entry *
38 tofu_lookup(struct ohash *h, const char *domain, const char *port)
39 {
40 	char		buf[GEMINI_URL_LEN];
41 	unsigned int	slot;
42 
43 	strlcpy(buf, domain, sizeof(buf));
44 	if (port != NULL && *port != '\0' && strcmp(port, "1965")) {
45 		strlcat(buf, ":", sizeof(buf));
46 		strlcat(buf, port, sizeof(buf));
47 	}
48 
49 	slot = ohash_qlookup(h, buf);
50 	return ohash_find(h, slot);
51 }
52 
53 void
54 tofu_add(struct ohash *h, struct tofu_entry *e)
55 {
56 	unsigned int	slot;
57 
58 	slot = ohash_qlookup(h, e->domain);
59 	ohash_insert(h, slot, e);
60 }
61 
62 void
63 tofu_update(struct ohash *h, struct tofu_entry *e)
64 {
65 	struct tofu_entry *t;
66 
67 	if ((t = tofu_lookup(h, e->domain, NULL)) == NULL)
68 		tofu_add(h, e);
69 	else {
70 		strlcpy(t->hash, e->hash, sizeof(t->hash));
71 		t->verified = e->verified;
72 		free(e);
73 	}
74 }
75 
76 void
77 tofu_temp_trust(struct ohash *h, const char *host, const char *port,
78     const char *hash)
79 {
80 	struct tofu_entry *e;
81 
82 	if ((e = calloc(1, sizeof(*e))) == NULL)
83 		abort();
84 
85 	strlcpy(e->domain, host, sizeof(e->domain));
86 	if (*port != '\0' && strcmp(port, "1965")) {
87 		strlcat(e->domain, ":", sizeof(e->domain));
88 		strlcat(e->domain, port, sizeof(e->domain));
89 	}
90 	strlcpy(e->hash, hash, sizeof(e->hash));
91 	e->verified = -1;
92 
93 	tofu_update(h, e);
94 }