1 53bf0b54 2023-02-23 op /*
 2 53bf0b54 2023-02-23 op  * Copyright (c) 2018 Stefan Sperling <stsp@openbsd.org>
 3 53bf0b54 2023-02-23 op  *
 4 53bf0b54 2023-02-23 op  * Permission to use, copy, modify, and distribute this software for any
 5 53bf0b54 2023-02-23 op  * purpose with or without fee is hereby granted, provided that the above
 6 53bf0b54 2023-02-23 op  * copyright notice and this permission notice appear in all copies.
 7 53bf0b54 2023-02-23 op  *
 8 53bf0b54 2023-02-23 op  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 9 53bf0b54 2023-02-23 op  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
10 53bf0b54 2023-02-23 op  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
11 53bf0b54 2023-02-23 op  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
12 53bf0b54 2023-02-23 op  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
13 53bf0b54 2023-02-23 op  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
14 53bf0b54 2023-02-23 op  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
15 53bf0b54 2023-02-23 op  */
16 53bf0b54 2023-02-23 op 
17 53bf0b54 2023-02-23 op #include <sys/types.h>
18 53bf0b54 2023-02-23 op #include <sha1.h>
19 53bf0b54 2023-02-23 op #include <sha2.h>
20 53bf0b54 2023-02-23 op #include <errno.h>
21 53bf0b54 2023-02-23 op #include <stdio.h>
22 53bf0b54 2023-02-23 op #include <stdlib.h>
23 53bf0b54 2023-02-23 op #include <limits.h>
24 53bf0b54 2023-02-23 op 
25 53bf0b54 2023-02-23 op #include "got_lib_hash.h"
26 53bf0b54 2023-02-23 op 
27 53bf0b54 2023-02-23 op int
28 53bf0b54 2023-02-23 op got_parse_xdigit(uint8_t *val, const char *hex)
29 53bf0b54 2023-02-23 op {
30 53bf0b54 2023-02-23 op 	char *ep;
31 53bf0b54 2023-02-23 op 	long lval;
32 53bf0b54 2023-02-23 op 
33 53bf0b54 2023-02-23 op 	errno = 0;
34 53bf0b54 2023-02-23 op 	lval = strtol(hex, &ep, 16);
35 53bf0b54 2023-02-23 op 	if (hex[0] == '\0' || *ep != '\0')
36 53bf0b54 2023-02-23 op 		return 0;
37 53bf0b54 2023-02-23 op 	if (errno == ERANGE && (lval == LONG_MAX || lval == LONG_MIN))
38 53bf0b54 2023-02-23 op 		return 0;
39 53bf0b54 2023-02-23 op 
40 53bf0b54 2023-02-23 op 	*val = (uint8_t)lval;
41 53bf0b54 2023-02-23 op 	return 1;
42 53bf0b54 2023-02-23 op }
43 53bf0b54 2023-02-23 op 
44 53bf0b54 2023-02-23 op int
45 53bf0b54 2023-02-23 op got_parse_sha1_digest(uint8_t *digest, const char *line)
46 53bf0b54 2023-02-23 op {
47 53bf0b54 2023-02-23 op 	uint8_t b = 0;
48 53bf0b54 2023-02-23 op 	char hex[3] = {'\0', '\0', '\0'};
49 53bf0b54 2023-02-23 op 	int i, j;
50 53bf0b54 2023-02-23 op 
51 53bf0b54 2023-02-23 op 	for (i = 0; i < SHA1_DIGEST_LENGTH; i++) {
52 53bf0b54 2023-02-23 op 		if (line[0] == '\0' || line[1] == '\0')
53 53bf0b54 2023-02-23 op 			return 0;
54 53bf0b54 2023-02-23 op 		for (j = 0; j < 2; j++) {
55 53bf0b54 2023-02-23 op 			hex[j] = *line;
56 53bf0b54 2023-02-23 op 			line++;
57 53bf0b54 2023-02-23 op 		}
58 53bf0b54 2023-02-23 op 		if (!got_parse_xdigit(&b, hex))
59 53bf0b54 2023-02-23 op 			return 0;
60 53bf0b54 2023-02-23 op 		digest[i] = b;
61 53bf0b54 2023-02-23 op 	}
62 53bf0b54 2023-02-23 op 
63 53bf0b54 2023-02-23 op 	return 1;
64 53bf0b54 2023-02-23 op }
65 53bf0b54 2023-02-23 op 
66 53bf0b54 2023-02-23 op char *
67 53bf0b54 2023-02-23 op got_sha1_digest_to_str(const uint8_t *digest, char *buf, size_t size)
68 53bf0b54 2023-02-23 op {
69 53bf0b54 2023-02-23 op 	char *p = buf;
70 53bf0b54 2023-02-23 op 	char hex[3];
71 53bf0b54 2023-02-23 op 	int i;
72 53bf0b54 2023-02-23 op 
73 53bf0b54 2023-02-23 op 	if (size < SHA1_DIGEST_STRING_LENGTH)
74 53bf0b54 2023-02-23 op 		return NULL;
75 53bf0b54 2023-02-23 op 
76 53bf0b54 2023-02-23 op 	for (i = 0; i < SHA1_DIGEST_LENGTH; i++) {
77 53bf0b54 2023-02-23 op 		snprintf(hex, sizeof(hex), "%.2x", digest[i]);
78 53bf0b54 2023-02-23 op 		p[0] = hex[0];
79 53bf0b54 2023-02-23 op 		p[1] = hex[1];
80 53bf0b54 2023-02-23 op 		p += 2;
81 53bf0b54 2023-02-23 op 	}
82 53bf0b54 2023-02-23 op 	p[0] = '\0';
83 53bf0b54 2023-02-23 op 
84 53bf0b54 2023-02-23 op 	return buf;
85 53bf0b54 2023-02-23 op }