1/*
2 * Copyright 2015-2016 The OpenSSL Project Authors. All Rights Reserved.
3 *
4 * Licensed under the Apache License 2.0 (the "License"). You may not use
5 * this file except in compliance with the License. You can obtain a copy
6 * in the file LICENSE in the source distribution or at
7 * https://www.openssl.org/source/license.html
8 */
9
10#ifndef OSSL_INTERNAL_DANE_H
11#define OSSL_INTERNAL_DANE_H
12
13#include <openssl/safestack.h>
14
15/*-
16 * Certificate usages:
17 * https://tools.ietf.org/html/rfc6698#section-2.1.1
18 */
19#define DANETLS_USAGE_PKIX_TA 0
20#define DANETLS_USAGE_PKIX_EE 1
21#define DANETLS_USAGE_DANE_TA 2
22#define DANETLS_USAGE_DANE_EE 3
23#define DANETLS_USAGE_LAST DANETLS_USAGE_DANE_EE
24
25/*-
26 * Selectors:
27 * https://tools.ietf.org/html/rfc6698#section-2.1.2
28 */
29#define DANETLS_SELECTOR_CERT 0
30#define DANETLS_SELECTOR_SPKI 1
31#define DANETLS_SELECTOR_LAST DANETLS_SELECTOR_SPKI
32
33/*-
34 * Matching types:
35 * https://tools.ietf.org/html/rfc6698#section-2.1.3
36 */
37#define DANETLS_MATCHING_FULL 0
38#define DANETLS_MATCHING_2256 1
39#define DANETLS_MATCHING_2512 2
40#define DANETLS_MATCHING_LAST DANETLS_MATCHING_2512
41
42typedef struct danetls_record_st {
43 uint8_t usage;
44 uint8_t selector;
45 uint8_t mtype;
46 unsigned char *data;
47 size_t dlen;
48 EVP_PKEY *spki;
49} danetls_record;
50
51DEFINE_STACK_OF(danetls_record)
52
53/*
54 * Shared DANE context
55 */
56struct dane_ctx_st {
57 const EVP_MD **mdevp; /* mtype -> digest */
58 uint8_t *mdord; /* mtype -> preference */
59 uint8_t mdmax; /* highest supported mtype */
60 unsigned long flags; /* feature bitmask */
61};
62
63/*
64 * Per connection DANE state
65 */
66struct ssl_dane_st {
67 struct dane_ctx_st *dctx;
68 STACK_OF(danetls_record) *trecs;
69 STACK_OF(X509) *certs; /* DANE-TA(2) Cert(0) Full(0) certs */
70 danetls_record *mtlsa; /* Matching TLSA record */
71 X509 *mcert; /* DANE matched cert */
72 uint32_t umask; /* Usages present */
73 int mdpth; /* Depth of matched cert */
74 int pdpth; /* Depth of PKIX trust */
75 unsigned long flags; /* feature bitmask */
76};
77
78#define DANETLS_ENABLED(dane) \
79 ((dane) != NULL && sk_danetls_record_num((dane)->trecs) > 0)
80
81#define DANETLS_USAGE_BIT(u) (((uint32_t)1) << u)
82
83#define DANETLS_PKIX_TA_MASK (DANETLS_USAGE_BIT(DANETLS_USAGE_PKIX_TA))
84#define DANETLS_PKIX_EE_MASK (DANETLS_USAGE_BIT(DANETLS_USAGE_PKIX_EE))
85#define DANETLS_DANE_TA_MASK (DANETLS_USAGE_BIT(DANETLS_USAGE_DANE_TA))
86#define DANETLS_DANE_EE_MASK (DANETLS_USAGE_BIT(DANETLS_USAGE_DANE_EE))
87
88#define DANETLS_PKIX_MASK (DANETLS_PKIX_TA_MASK | DANETLS_PKIX_EE_MASK)
89#define DANETLS_DANE_MASK (DANETLS_DANE_TA_MASK | DANETLS_DANE_EE_MASK)
90#define DANETLS_TA_MASK (DANETLS_PKIX_TA_MASK | DANETLS_DANE_TA_MASK)
91#define DANETLS_EE_MASK (DANETLS_PKIX_EE_MASK | DANETLS_DANE_EE_MASK)
92
93#define DANETLS_HAS_PKIX(dane) ((dane) && ((dane)->umask & DANETLS_PKIX_MASK))
94#define DANETLS_HAS_DANE(dane) ((dane) && ((dane)->umask & DANETLS_DANE_MASK))
95#define DANETLS_HAS_TA(dane) ((dane) && ((dane)->umask & DANETLS_TA_MASK))
96#define DANETLS_HAS_EE(dane) ((dane) && ((dane)->umask & DANETLS_EE_MASK))
97
98#define DANETLS_HAS_PKIX_TA(dane) ((dane)&&((dane)->umask & DANETLS_PKIX_TA_MASK))
99#define DANETLS_HAS_PKIX_EE(dane) ((dane)&&((dane)->umask & DANETLS_PKIX_EE_MASK))
100#define DANETLS_HAS_DANE_TA(dane) ((dane)&&((dane)->umask & DANETLS_DANE_TA_MASK))
101#define DANETLS_HAS_DANE_EE(dane) ((dane)&&((dane)->umask & DANETLS_DANE_EE_MASK))
102
103#endif /* OSSL_INTERNAL_DANE_H */
104