2 * X.509v3 certificate parsing and processing
3 * Copyright (c) 2006-2011, Jouni Malinen <j@w1.fi>
5 * This software may be distributed under the terms of the BSD license.
6 * See README for more details.
14 struct x509_algorithm_identifier {
18 struct x509_name_attr {
19 enum x509_name_attr_type {
20 X509_NAME_ATTR_NOT_USED,
32 #define X509_MAX_NAME_ATTRIBUTES 20
35 struct x509_name_attr attr[X509_MAX_NAME_ATTRIBUTES];
37 char *email; /* emailAddress */
39 /* from alternative name extension */
40 char *alt_email; /* rfc822Name */
41 char *dns; /* dNSName */
42 char *uri; /* uniformResourceIdentifier */
43 u8 *ip; /* iPAddress */
44 size_t ip_len; /* IPv4: 4, IPv6: 16 */
45 struct asn1_oid rid; /* registeredID */
48 #define X509_MAX_SERIAL_NUM_LEN 20
50 struct x509_certificate {
51 struct x509_certificate *next;
52 enum { X509_CERT_V1 = 0, X509_CERT_V2 = 1, X509_CERT_V3 = 2 } version;
53 u8 serial_number[X509_MAX_SERIAL_NUM_LEN];
54 size_t serial_number_len;
55 struct x509_algorithm_identifier signature;
56 struct x509_name issuer;
57 struct x509_name subject;
59 size_t subject_dn_len;
62 struct x509_algorithm_identifier public_key_alg;
64 size_t public_key_len;
65 struct x509_algorithm_identifier signature_alg;
67 size_t sign_value_len;
70 unsigned int extensions_present;
71 #define X509_EXT_BASIC_CONSTRAINTS (1 << 0)
72 #define X509_EXT_PATH_LEN_CONSTRAINT (1 << 1)
73 #define X509_EXT_KEY_USAGE (1 << 2)
74 #define X509_EXT_SUBJECT_ALT_NAME (1 << 3)
75 #define X509_EXT_ISSUER_ALT_NAME (1 << 4)
76 #define X509_EXT_EXT_KEY_USAGE (1 << 5)
78 /* BasicConstraints */
80 unsigned long path_len_constraint; /* pathLenConstraint */
83 unsigned long key_usage;
84 #define X509_KEY_USAGE_DIGITAL_SIGNATURE (1 << 0)
85 #define X509_KEY_USAGE_NON_REPUDIATION (1 << 1)
86 #define X509_KEY_USAGE_KEY_ENCIPHERMENT (1 << 2)
87 #define X509_KEY_USAGE_DATA_ENCIPHERMENT (1 << 3)
88 #define X509_KEY_USAGE_KEY_AGREEMENT (1 << 4)
89 #define X509_KEY_USAGE_KEY_CERT_SIGN (1 << 5)
90 #define X509_KEY_USAGE_CRL_SIGN (1 << 6)
91 #define X509_KEY_USAGE_ENCIPHER_ONLY (1 << 7)
92 #define X509_KEY_USAGE_DECIPHER_ONLY (1 << 8)
95 unsigned long ext_key_usage;
96 #define X509_EXT_KEY_USAGE_ANY (1 << 0)
97 #define X509_EXT_KEY_USAGE_SERVER_AUTH (1 << 1)
98 #define X509_EXT_KEY_USAGE_CLIENT_AUTH (1 << 2)
99 #define X509_EXT_KEY_USAGE_OCSP (1 << 3)
102 * The DER format certificate follows struct x509_certificate. These
103 * pointers point to that buffer.
105 const u8 *cert_start;
107 const u8 *tbs_cert_start;
110 /* Meta data used for certificate validation */
111 unsigned int ocsp_good:1;
112 unsigned int ocsp_revoked:1;
113 unsigned int issuer_trusted:1;
118 X509_VALIDATE_BAD_CERTIFICATE,
119 X509_VALIDATE_UNSUPPORTED_CERTIFICATE,
120 X509_VALIDATE_CERTIFICATE_REVOKED,
121 X509_VALIDATE_CERTIFICATE_EXPIRED,
122 X509_VALIDATE_CERTIFICATE_UNKNOWN,
123 X509_VALIDATE_UNKNOWN_CA
126 void x509_certificate_free(struct x509_certificate *cert);
127 int x509_parse_algorithm_identifier(const u8 *buf, size_t len,
128 struct x509_algorithm_identifier *id,
130 int x509_parse_name(const u8 *buf, size_t len, struct x509_name *name,
132 int x509_parse_time(const u8 *buf, size_t len, u8 asn1_tag, os_time_t *val);
133 struct x509_certificate * x509_certificate_parse(const u8 *buf, size_t len);
134 void x509_free_name(struct x509_name *name);
135 void x509_name_string(struct x509_name *name, char *buf, size_t len);
136 int x509_name_compare(struct x509_name *a, struct x509_name *b);
137 void x509_certificate_chain_free(struct x509_certificate *cert);
138 int x509_check_signature(struct x509_certificate *issuer,
139 struct x509_algorithm_identifier *signature,
140 const u8 *sign_value, size_t sign_value_len,
141 const u8 *signed_data, size_t signed_data_len);
142 int x509_certificate_check_signature(struct x509_certificate *issuer,
143 struct x509_certificate *cert);
144 int x509_certificate_chain_validate(struct x509_certificate *trusted,
145 struct x509_certificate *chain,
146 int *reason, int disable_time_checks);
147 struct x509_certificate *
148 x509_certificate_get_subject(struct x509_certificate *chain,
149 struct x509_name *name);
150 int x509_certificate_self_signed(struct x509_certificate *cert);
152 int x509_sha1_oid(struct asn1_oid *oid);
153 int x509_sha256_oid(struct asn1_oid *oid);
154 int x509_sha384_oid(struct asn1_oid *oid);
155 int x509_sha512_oid(struct asn1_oid *oid);
157 #endif /* X509V3_H */