1 /* 2 * ASN.1 DER parsing 3 * Copyright (c) 2006, 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 ASN1_H 10 #define ASN1_H 11 12 #define ASN1_TAG_EOC 0x00 /* not used with DER */ 13 #define ASN1_TAG_BOOLEAN 0x01 14 #define ASN1_TAG_INTEGER 0x02 15 #define ASN1_TAG_BITSTRING 0x03 16 #define ASN1_TAG_OCTETSTRING 0x04 17 #define ASN1_TAG_NULL 0x05 18 #define ASN1_TAG_OID 0x06 19 #define ASN1_TAG_OBJECT_DESCRIPTOR 0x07 /* not yet parsed */ 20 #define ASN1_TAG_EXTERNAL 0x08 /* not yet parsed */ 21 #define ASN1_TAG_REAL 0x09 /* not yet parsed */ 22 #define ASN1_TAG_ENUMERATED 0x0A /* not yet parsed */ 23 #define ASN1_TAG_EMBEDDED_PDV 0x0B /* not yet parsed */ 24 #define ASN1_TAG_UTF8STRING 0x0C /* not yet parsed */ 25 #define ANS1_TAG_RELATIVE_OID 0x0D 26 #define ASN1_TAG_TIME 0x0E 27 #define ASN1_TAG_SEQUENCE 0x10 /* shall be constructed */ 28 #define ASN1_TAG_SET 0x11 29 #define ASN1_TAG_NUMERICSTRING 0x12 /* not yet parsed */ 30 #define ASN1_TAG_PRINTABLESTRING 0x13 31 #define ASN1_TAG_T61STRING 0x14 /* not yet parsed */ 32 #define ASN1_TAG_VIDEOTEXSTRING 0x15 /* not yet parsed */ 33 #define ASN1_TAG_IA5STRING 0x16 34 #define ASN1_TAG_UTCTIME 0x17 35 #define ASN1_TAG_GENERALIZEDTIME 0x18 /* not yet parsed */ 36 #define ASN1_TAG_GRAPHICSTRING 0x19 /* not yet parsed */ 37 #define ASN1_TAG_VISIBLESTRING 0x1A 38 #define ASN1_TAG_GENERALSTRING 0x1B /* not yet parsed */ 39 #define ASN1_TAG_UNIVERSALSTRING 0x1C /* not yet parsed */ 40 #define ASN1_TAG_CHARACTERSTRING 0x1D /* not yet parsed */ 41 #define ASN1_TAG_BMPSTRING 0x1E /* not yet parsed */ 42 43 #define ASN1_CLASS_UNIVERSAL 0 44 #define ASN1_CLASS_APPLICATION 1 45 #define ASN1_CLASS_CONTEXT_SPECIFIC 2 46 #define ASN1_CLASS_PRIVATE 3 47 48 49 struct asn1_hdr { 50 const u8 *payload; 51 u8 identifier, class, constructed; 52 unsigned int tag, length; 53 }; 54 55 #define ASN1_MAX_OID_LEN 20 56 struct asn1_oid { 57 unsigned long oid[ASN1_MAX_OID_LEN]; 58 size_t len; 59 }; 60 61 62 int asn1_get_next(const u8 *buf, size_t len, struct asn1_hdr *hdr); 63 void asn1_print_hdr(const struct asn1_hdr *hdr, const char *title); 64 void asn1_unexpected(const struct asn1_hdr *hdr, const char *title); 65 int asn1_parse_oid(const u8 *buf, size_t len, struct asn1_oid *oid); 66 int asn1_get_oid(const u8 *buf, size_t len, struct asn1_oid *oid, 67 const u8 **next); 68 void asn1_oid_to_str(const struct asn1_oid *oid, char *buf, size_t len); 69 unsigned long asn1_bit_string_to_long(const u8 *buf, size_t len); 70 int asn1_oid_equal(const struct asn1_oid *a, const struct asn1_oid *b); 71 int asn1_get_integer(const u8 *buf, size_t len, int *integer, const u8 **next); 72 int asn1_get_sequence(const u8 *buf, size_t len, struct asn1_hdr *hdr, 73 const u8 **next); 74 int asn1_get_alg_id(const u8 *buf, size_t len, struct asn1_oid *oid, 75 const u8 **params, size_t *params_len, const u8 **next); 76 void asn1_put_integer(struct wpabuf *buf, int val); 77 void asn1_put_octet_string(struct wpabuf *buf, const struct wpabuf *val); 78 void asn1_put_oid(struct wpabuf *buf, const struct asn1_oid *oid); 79 void asn1_put_hdr(struct wpabuf *buf, u8 class, int constructed, u8 tag, 80 size_t len); 81 void asn1_put_sequence(struct wpabuf *buf, const struct wpabuf *payload); 82 void asn1_put_set(struct wpabuf *buf, const struct wpabuf *payload); 83 void asn1_put_utf8string(struct wpabuf *buf, const char *val); 84 struct wpabuf * asn1_build_alg_id(const struct asn1_oid *oid, 85 const struct wpabuf *params); 86 struct wpabuf * asn1_encaps(struct wpabuf *buf, u8 class, u8 tag); 87 88 static inline bool asn1_is_oid(const struct asn1_hdr *hdr) 89 { 90 return hdr->class == ASN1_CLASS_UNIVERSAL && 91 hdr->tag == ASN1_TAG_OID; 92 } 93 94 static inline bool asn1_is_boolean(const struct asn1_hdr *hdr) 95 { 96 return hdr->class == ASN1_CLASS_UNIVERSAL && 97 hdr->tag == ASN1_TAG_BOOLEAN; 98 } 99 100 static inline bool asn1_is_integer(const struct asn1_hdr *hdr) 101 { 102 return hdr->class == ASN1_CLASS_UNIVERSAL && 103 hdr->tag == ASN1_TAG_INTEGER; 104 } 105 106 static inline bool asn1_is_enumerated(const struct asn1_hdr *hdr) 107 { 108 return hdr->class == ASN1_CLASS_UNIVERSAL && 109 hdr->tag == ASN1_TAG_ENUMERATED; 110 } 111 112 static inline bool asn1_is_sequence(const struct asn1_hdr *hdr) 113 { 114 return hdr->class == ASN1_CLASS_UNIVERSAL && 115 hdr->tag == ASN1_TAG_SEQUENCE; 116 } 117 118 static inline bool asn1_is_set(const struct asn1_hdr *hdr) 119 { 120 return hdr->class == ASN1_CLASS_UNIVERSAL && 121 hdr->tag == ASN1_TAG_SET; 122 } 123 124 static inline bool asn1_is_octetstring(const struct asn1_hdr *hdr) 125 { 126 return hdr->class == ASN1_CLASS_UNIVERSAL && 127 hdr->tag == ASN1_TAG_OCTETSTRING; 128 } 129 130 static inline bool asn1_is_bitstring(const struct asn1_hdr *hdr) 131 { 132 return hdr->class == ASN1_CLASS_UNIVERSAL && 133 hdr->tag == ASN1_TAG_BITSTRING; 134 } 135 136 static inline bool asn1_is_utctime(const struct asn1_hdr *hdr) 137 { 138 return hdr->class == ASN1_CLASS_UNIVERSAL && 139 hdr->tag == ASN1_TAG_UTCTIME; 140 } 141 142 static inline bool asn1_is_generalizedtime(const struct asn1_hdr *hdr) 143 { 144 return hdr->class == ASN1_CLASS_UNIVERSAL && 145 hdr->tag == ASN1_TAG_GENERALIZEDTIME; 146 } 147 148 static inline bool asn1_is_string_type(const struct asn1_hdr *hdr) 149 { 150 if (hdr->class != ASN1_CLASS_UNIVERSAL || hdr->constructed) 151 return false; 152 return hdr->tag == ASN1_TAG_UTF8STRING || 153 hdr->tag == ASN1_TAG_NUMERICSTRING || 154 hdr->tag == ASN1_TAG_PRINTABLESTRING || 155 hdr->tag == ASN1_TAG_T61STRING || 156 hdr->tag == ASN1_TAG_VIDEOTEXSTRING || 157 hdr->tag == ASN1_TAG_IA5STRING || 158 hdr->tag == ASN1_TAG_GRAPHICSTRING || 159 hdr->tag == ASN1_TAG_VISIBLESTRING || 160 hdr->tag == ASN1_TAG_GENERALSTRING || 161 hdr->tag == ASN1_TAG_UNIVERSALSTRING || 162 hdr->tag == ASN1_TAG_CHARACTERSTRING || 163 hdr->tag == ASN1_TAG_BMPSTRING; 164 } 165 166 static inline bool asn1_is_bmpstring(const struct asn1_hdr *hdr) 167 { 168 return hdr->class == ASN1_CLASS_UNIVERSAL && 169 hdr->tag == ASN1_TAG_BMPSTRING; 170 } 171 172 static inline bool asn1_is_utf8string(const struct asn1_hdr *hdr) 173 { 174 return hdr->class == ASN1_CLASS_UNIVERSAL && 175 hdr->tag == ASN1_TAG_UTF8STRING; 176 } 177 178 static inline bool asn1_is_null(const struct asn1_hdr *hdr) 179 { 180 return hdr->class == ASN1_CLASS_UNIVERSAL && 181 hdr->tag == ASN1_TAG_NULL; 182 } 183 184 static inline bool asn1_is_cs_tag(const struct asn1_hdr *hdr, unsigned int tag) 185 { 186 return hdr->class == ASN1_CLASS_CONTEXT_SPECIFIC && 187 hdr->tag == tag; 188 } 189 190 extern const struct asn1_oid asn1_sha1_oid; 191 extern const struct asn1_oid asn1_sha256_oid; 192 extern const struct asn1_oid asn1_ec_public_key_oid; 193 extern const struct asn1_oid asn1_prime256v1_oid; 194 extern const struct asn1_oid asn1_secp384r1_oid; 195 extern const struct asn1_oid asn1_secp521r1_oid; 196 extern const struct asn1_oid asn1_brainpoolP256r1_oid; 197 extern const struct asn1_oid asn1_brainpoolP384r1_oid; 198 extern const struct asn1_oid asn1_brainpoolP512r1_oid; 199 extern const struct asn1_oid asn1_aes_siv_cmac_aead_256_oid; 200 extern const struct asn1_oid asn1_aes_siv_cmac_aead_384_oid; 201 extern const struct asn1_oid asn1_aes_siv_cmac_aead_512_oid; 202 extern const struct asn1_oid asn1_aes_siv_cmac_aead_256_oid; 203 extern const struct asn1_oid asn1_aes_siv_cmac_aead_384_oid; 204 extern const struct asn1_oid asn1_aes_siv_cmac_aead_512_oid; 205 extern const struct asn1_oid asn1_pbkdf2_oid; 206 extern const struct asn1_oid asn1_pbkdf2_hmac_sha256_oid; 207 extern const struct asn1_oid asn1_pbkdf2_hmac_sha384_oid; 208 extern const struct asn1_oid asn1_pbkdf2_hmac_sha512_oid; 209 extern const struct asn1_oid asn1_dpp_config_params_oid; 210 extern const struct asn1_oid asn1_dpp_asymmetric_key_package_oid; 211 212 #endif /* ASN1_H */ 213