X.509: Add parsing of alternative name to internal TLS implementation
[wpasupplicant] / src / tls / x509v3.h
1 /*
2  * X.509v3 certificate parsing and processing
3  * Copyright (c) 2006, Jouni Malinen <j@w1.fi>
4  *
5  * This program is free software; you can redistribute it and/or modify
6  * it under the terms of the GNU General Public License version 2 as
7  * published by the Free Software Foundation.
8  *
9  * Alternatively, this software may be distributed under the terms of BSD
10  * license.
11  *
12  * See README and COPYING for more details.
13  */
14
15 #ifndef X509V3_H
16 #define X509V3_H
17
18 #include "asn1.h"
19
20 struct x509_algorithm_identifier {
21         struct asn1_oid oid;
22 };
23
24 struct x509_name {
25         char *cn; /* commonName */
26         char *c; /* countryName */
27         char *l; /* localityName */
28         char *st; /* stateOrProvinceName */
29         char *o; /* organizationName */
30         char *ou; /* organizationalUnitName */
31         char *email; /* emailAddress */
32
33         /* from alternative name extension */
34         char *alt_email; /* rfc822Name */
35         char *dns; /* dNSName */
36         char *uri; /* uniformResourceIdentifier */
37         u8 *ip; /* iPAddress */
38         size_t ip_len; /* IPv4: 4, IPv6: 16 */
39         struct asn1_oid rid; /* registeredID */
40 };
41
42 struct x509_certificate {
43         struct x509_certificate *next;
44         enum { X509_CERT_V1 = 0, X509_CERT_V2 = 1, X509_CERT_V3 = 2 } version;
45         unsigned long serial_number;
46         struct x509_algorithm_identifier signature;
47         struct x509_name issuer;
48         struct x509_name subject;
49         os_time_t not_before;
50         os_time_t not_after;
51         struct x509_algorithm_identifier public_key_alg;
52         u8 *public_key;
53         size_t public_key_len;
54         struct x509_algorithm_identifier signature_alg;
55         u8 *sign_value;
56         size_t sign_value_len;
57
58         /* Extensions */
59         unsigned int extensions_present;
60 #define X509_EXT_BASIC_CONSTRAINTS              (1 << 0)
61 #define X509_EXT_PATH_LEN_CONSTRAINT            (1 << 1)
62 #define X509_EXT_KEY_USAGE                      (1 << 2)
63 #define X509_EXT_SUBJECT_ALT_NAME               (1 << 3)
64 #define X509_EXT_ISSUER_ALT_NAME                (1 << 4)
65
66         /* BasicConstraints */
67         int ca; /* cA */
68         unsigned long path_len_constraint; /* pathLenConstraint */
69
70         /* KeyUsage */
71         unsigned long key_usage;
72 #define X509_KEY_USAGE_DIGITAL_SIGNATURE        (1 << 0)
73 #define X509_KEY_USAGE_NON_REPUDIATION          (1 << 1)
74 #define X509_KEY_USAGE_KEY_ENCIPHERMENT         (1 << 2)
75 #define X509_KEY_USAGE_DATA_ENCIPHERMENT        (1 << 3)
76 #define X509_KEY_USAGE_KEY_AGREEMENT            (1 << 4)
77 #define X509_KEY_USAGE_KEY_CERT_SIGN            (1 << 5)
78 #define X509_KEY_USAGE_CRL_SIGN                 (1 << 6)
79 #define X509_KEY_USAGE_ENCIPHER_ONLY            (1 << 7)
80 #define X509_KEY_USAGE_DECIPHER_ONLY            (1 << 8)
81
82         /*
83          * The DER format certificate follows struct x509_certificate. These
84          * pointers point to that buffer.
85          */
86         const u8 *cert_start;
87         size_t cert_len;
88         const u8 *tbs_cert_start;
89         size_t tbs_cert_len;
90 };
91
92 enum {
93         X509_VALIDATE_OK,
94         X509_VALIDATE_BAD_CERTIFICATE,
95         X509_VALIDATE_UNSUPPORTED_CERTIFICATE,
96         X509_VALIDATE_CERTIFICATE_REVOKED,
97         X509_VALIDATE_CERTIFICATE_EXPIRED,
98         X509_VALIDATE_CERTIFICATE_UNKNOWN,
99         X509_VALIDATE_UNKNOWN_CA
100 };
101
102 #ifdef CONFIG_INTERNAL_X509
103
104 void x509_certificate_free(struct x509_certificate *cert);
105 struct x509_certificate * x509_certificate_parse(const u8 *buf, size_t len);
106 void x509_name_string(struct x509_name *name, char *buf, size_t len);
107 int x509_name_compare(struct x509_name *a, struct x509_name *b);
108 void x509_certificate_chain_free(struct x509_certificate *cert);
109 int x509_certificate_check_signature(struct x509_certificate *issuer,
110                                      struct x509_certificate *cert);
111 int x509_certificate_chain_validate(struct x509_certificate *trusted,
112                                     struct x509_certificate *chain,
113                                     int *reason);
114 struct x509_certificate *
115 x509_certificate_get_subject(struct x509_certificate *chain,
116                              struct x509_name *name);
117 int x509_certificate_self_signed(struct x509_certificate *cert);
118
119 #else /* CONFIG_INTERNAL_X509 */
120
121 static inline void x509_certificate_free(struct x509_certificate *cert)
122 {
123 }
124
125 static inline struct x509_certificate *
126 x509_certificate_parse(const u8 *buf, size_t len)
127 {
128         return NULL;
129 }
130
131 static inline void x509_name_string(struct x509_name *name, char *buf,
132                                     size_t len)
133 {
134         if (len)
135                 buf[0] = '\0';
136 }
137
138 static inline void x509_certificate_chain_free(struct x509_certificate *cert)
139 {
140 }
141
142 static inline int
143 x509_certificate_chain_validate(struct x509_certificate *trusted,
144                                 struct x509_certificate *chain,
145                                 int *reason)
146 {
147         return -1;
148 }
149
150 static inline struct x509_certificate *
151 x509_certificate_get_subject(struct x509_certificate *chain,
152                              struct x509_name *name)
153 {
154         return NULL;
155 }
156
157 static inline int x509_certificate_self_signed(struct x509_certificate *cert)
158 {
159         return -1;
160 }
161
162 #endif /* CONFIG_INTERNAL_X509 */
163
164 #endif /* X509V3_H */