1 /*
2 * Copyright (C) Internet Systems Consortium, Inc. ("ISC")
3 *
4 * Permission to use, copy, modify, and/or 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 ISC DISCLAIMS ALL WARRANTIES WITH
9 * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
10 * AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
11 * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
12 * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
13 * OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
14 * PERFORMANCE OF THIS SOFTWARE.
15 */
16
17 /* $Id: nsec3param_51.c,v 1.13 2020/02/26 18:49:02 florian Exp $ */
18
19 /*
20 * Copyright (C) 2004 Nominet, Ltd.
21 *
22 * Permission to use, copy, modify, and distribute this software for any
23 * purpose with or without fee is hereby granted, provided that the above
24 * copyright notice and this permission notice appear in all copies.
25 *
26 * THE SOFTWARE IS PROVIDED "AS IS" AND NOMINET DISCLAIMS ALL WARRANTIES WITH
27 * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
28 * AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
29 * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
30 * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
31 * OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
32 * PERFORMANCE OF THIS SOFTWARE.
33 */
34
35 /* RFC 5155 */
36
37 #ifndef RDATA_GENERIC_NSEC3PARAM_51_C
38 #define RDATA_GENERIC_NSEC3PARAM_51_C
39
40 #include <isc/base32.h>
41
42 static inline isc_result_t
totext_nsec3param(ARGS_TOTEXT)43 totext_nsec3param(ARGS_TOTEXT) {
44 isc_region_t sr;
45 unsigned int i, j;
46 unsigned char hash;
47 unsigned char flags;
48 char buf[sizeof("65535 ")];
49 uint32_t iterations;
50
51 REQUIRE(rdata->type == dns_rdatatype_nsec3param);
52 REQUIRE(rdata->length != 0);
53
54 UNUSED(tctx);
55
56 dns_rdata_toregion(rdata, &sr);
57
58 hash = uint8_fromregion(&sr);
59 isc_region_consume(&sr, 1);
60
61 flags = uint8_fromregion(&sr);
62 isc_region_consume(&sr, 1);
63
64 iterations = uint16_fromregion(&sr);
65 isc_region_consume(&sr, 2);
66
67 snprintf(buf, sizeof(buf), "%u ", hash);
68 RETERR(isc_str_tobuffer(buf, target));
69
70 snprintf(buf, sizeof(buf), "%u ", flags);
71 RETERR(isc_str_tobuffer(buf, target));
72
73 snprintf(buf, sizeof(buf), "%u ", iterations);
74 RETERR(isc_str_tobuffer(buf, target));
75
76 j = uint8_fromregion(&sr);
77 isc_region_consume(&sr, 1);
78 INSIST(j <= sr.length);
79
80 if (j != 0) {
81 i = sr.length;
82 sr.length = j;
83 RETERR(isc_hex_totext(&sr, 1, "", target));
84 sr.length = i - j;
85 } else
86 RETERR(isc_str_tobuffer("-", target));
87
88 return (ISC_R_SUCCESS);
89 }
90
91 static inline isc_result_t
fromwire_nsec3param(ARGS_FROMWIRE)92 fromwire_nsec3param(ARGS_FROMWIRE) {
93 isc_region_t sr, rr;
94 unsigned int saltlen;
95
96 REQUIRE(type == dns_rdatatype_nsec3param);
97
98 UNUSED(type);
99 UNUSED(rdclass);
100 UNUSED(options);
101 UNUSED(dctx);
102
103 isc_buffer_activeregion(source, &sr);
104 rr = sr;
105
106 /* hash(1), flags(1), iterations(2), saltlen(1) */
107 if (sr.length < 5U)
108 return (DNS_R_FORMERR);
109 saltlen = sr.base[4];
110 isc_region_consume(&sr, 5);
111
112 if (sr.length < saltlen)
113 return (DNS_R_FORMERR);
114 isc_region_consume(&sr, saltlen);
115 RETERR(isc_mem_tobuffer(target, rr.base, rr.length));
116 isc_buffer_forward(source, rr.length);
117 return (ISC_R_SUCCESS);
118 }
119
120 static inline isc_result_t
towire_nsec3param(ARGS_TOWIRE)121 towire_nsec3param(ARGS_TOWIRE) {
122 isc_region_t sr;
123
124 REQUIRE(rdata->type == dns_rdatatype_nsec3param);
125 REQUIRE(rdata->length != 0);
126
127 UNUSED(cctx);
128
129 dns_rdata_toregion(rdata, &sr);
130 return (isc_mem_tobuffer(target, sr.base, sr.length));
131 }
132
133 #endif /* RDATA_GENERIC_NSEC3PARAM_51_C */
134