1 /* 2 * X.509v3 certificate parsing and processing 3 * Copyright (c) 2006-2011, Jouni Malinen <j@w1.fi> 4 * 5 * This software may be distributed under the terms of the BSD license. 6 * See README for more details. 7 */ 8 9 #ifndef X509V3_H 10 #define X509V3_H 11 12 #include "asn1.h" 13 14 struct x509_algorithm_identifier { 15 struct asn1_oid oid; 16 }; 17 18 struct x509_name_attr { 19 enum x509_name_attr_type { 20 X509_NAME_ATTR_NOT_USED, 21 X509_NAME_ATTR_DC, 22 X509_NAME_ATTR_CN, 23 X509_NAME_ATTR_C, 24 X509_NAME_ATTR_L, 25 X509_NAME_ATTR_ST, 26 X509_NAME_ATTR_O, 27 X509_NAME_ATTR_OU 28 } type; 29 char *value; 30 }; 31 32 #define X509_MAX_NAME_ATTRIBUTES 20 33 34 struct x509_name { 35 struct x509_name_attr attr[X509_MAX_NAME_ATTRIBUTES]; 36 size_t num_attr; 37 char *email; /* emailAddress */ 38 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 */ 46 }; 47 48 struct x509_certificate { 49 struct x509_certificate *next; 50 enum { X509_CERT_V1 = 0, X509_CERT_V2 = 1, X509_CERT_V3 = 2 } version; 51 unsigned long serial_number; 52 struct x509_algorithm_identifier signature; 53 struct x509_name issuer; 54 struct x509_name subject; 55 os_time_t not_before; 56 os_time_t not_after; 57 struct x509_algorithm_identifier public_key_alg; 58 u8 *public_key; 59 size_t public_key_len; 60 struct x509_algorithm_identifier signature_alg; 61 u8 *sign_value; 62 size_t sign_value_len; 63 64 /* Extensions */ 65 unsigned int extensions_present; 66 #define X509_EXT_BASIC_CONSTRAINTS (1 << 0) 67 #define X509_EXT_PATH_LEN_CONSTRAINT (1 << 1) 68 #define X509_EXT_KEY_USAGE (1 << 2) 69 #define X509_EXT_SUBJECT_ALT_NAME (1 << 3) 70 #define X509_EXT_ISSUER_ALT_NAME (1 << 4) 71 72 /* BasicConstraints */ 73 int ca; /* cA */ 74 unsigned long path_len_constraint; /* pathLenConstraint */ 75 76 /* KeyUsage */ 77 unsigned long key_usage; 78 #define X509_KEY_USAGE_DIGITAL_SIGNATURE (1 << 0) 79 #define X509_KEY_USAGE_NON_REPUDIATION (1 << 1) 80 #define X509_KEY_USAGE_KEY_ENCIPHERMENT (1 << 2) 81 #define X509_KEY_USAGE_DATA_ENCIPHERMENT (1 << 3) 82 #define X509_KEY_USAGE_KEY_AGREEMENT (1 << 4) 83 #define X509_KEY_USAGE_KEY_CERT_SIGN (1 << 5) 84 #define X509_KEY_USAGE_CRL_SIGN (1 << 6) 85 #define X509_KEY_USAGE_ENCIPHER_ONLY (1 << 7) 86 #define X509_KEY_USAGE_DECIPHER_ONLY (1 << 8) 87 88 /* 89 * The DER format certificate follows struct x509_certificate. These 90 * pointers point to that buffer. 91 */ 92 const u8 *cert_start; 93 size_t cert_len; 94 const u8 *tbs_cert_start; 95 size_t tbs_cert_len; 96 }; 97 98 enum { 99 X509_VALIDATE_OK, 100 X509_VALIDATE_BAD_CERTIFICATE, 101 X509_VALIDATE_UNSUPPORTED_CERTIFICATE, 102 X509_VALIDATE_CERTIFICATE_REVOKED, 103 X509_VALIDATE_CERTIFICATE_EXPIRED, 104 X509_VALIDATE_CERTIFICATE_UNKNOWN, 105 X509_VALIDATE_UNKNOWN_CA 106 }; 107 108 void x509_certificate_free(struct x509_certificate *cert); 109 struct x509_certificate * x509_certificate_parse(const u8 *buf, size_t len); 110 void x509_name_string(struct x509_name *name, char *buf, size_t len); 111 int x509_name_compare(struct x509_name *a, struct x509_name *b); 112 void x509_certificate_chain_free(struct x509_certificate *cert); 113 int x509_certificate_check_signature(struct x509_certificate *issuer, 114 struct x509_certificate *cert); 115 int x509_certificate_chain_validate(struct x509_certificate *trusted, 116 struct x509_certificate *chain, 117 int *reason, int disable_time_checks); 118 struct x509_certificate * 119 x509_certificate_get_subject(struct x509_certificate *chain, 120 struct x509_name *name); 121 int x509_certificate_self_signed(struct x509_certificate *cert); 122 123 #endif /* X509V3_H */ 124