16d49e1aeSJan Lentfer /* 26d49e1aeSJan Lentfer * ASN.1 DER parsing 36d49e1aeSJan Lentfer * Copyright (c) 2006, Jouni Malinen <j@w1.fi> 46d49e1aeSJan Lentfer * 53ff40c12SJohn Marino * This software may be distributed under the terms of the BSD license. 63ff40c12SJohn Marino * See README for more details. 76d49e1aeSJan Lentfer */ 86d49e1aeSJan Lentfer 96d49e1aeSJan Lentfer #ifndef ASN1_H 106d49e1aeSJan Lentfer #define ASN1_H 116d49e1aeSJan Lentfer 126d49e1aeSJan Lentfer #define ASN1_TAG_EOC 0x00 /* not used with DER */ 136d49e1aeSJan Lentfer #define ASN1_TAG_BOOLEAN 0x01 146d49e1aeSJan Lentfer #define ASN1_TAG_INTEGER 0x02 156d49e1aeSJan Lentfer #define ASN1_TAG_BITSTRING 0x03 166d49e1aeSJan Lentfer #define ASN1_TAG_OCTETSTRING 0x04 176d49e1aeSJan Lentfer #define ASN1_TAG_NULL 0x05 186d49e1aeSJan Lentfer #define ASN1_TAG_OID 0x06 196d49e1aeSJan Lentfer #define ASN1_TAG_OBJECT_DESCRIPTOR 0x07 /* not yet parsed */ 206d49e1aeSJan Lentfer #define ASN1_TAG_EXTERNAL 0x08 /* not yet parsed */ 216d49e1aeSJan Lentfer #define ASN1_TAG_REAL 0x09 /* not yet parsed */ 226d49e1aeSJan Lentfer #define ASN1_TAG_ENUMERATED 0x0A /* not yet parsed */ 23*a1157835SDaniel Fojt #define ASN1_TAG_EMBEDDED_PDV 0x0B /* not yet parsed */ 246d49e1aeSJan Lentfer #define ASN1_TAG_UTF8STRING 0x0C /* not yet parsed */ 256d49e1aeSJan Lentfer #define ANS1_TAG_RELATIVE_OID 0x0D 266d49e1aeSJan Lentfer #define ASN1_TAG_SEQUENCE 0x10 /* shall be constructed */ 276d49e1aeSJan Lentfer #define ASN1_TAG_SET 0x11 286d49e1aeSJan Lentfer #define ASN1_TAG_NUMERICSTRING 0x12 /* not yet parsed */ 296d49e1aeSJan Lentfer #define ASN1_TAG_PRINTABLESTRING 0x13 306d49e1aeSJan Lentfer #define ASN1_TAG_TG1STRING 0x14 /* not yet parsed */ 316d49e1aeSJan Lentfer #define ASN1_TAG_VIDEOTEXSTRING 0x15 /* not yet parsed */ 326d49e1aeSJan Lentfer #define ASN1_TAG_IA5STRING 0x16 336d49e1aeSJan Lentfer #define ASN1_TAG_UTCTIME 0x17 346d49e1aeSJan Lentfer #define ASN1_TAG_GENERALIZEDTIME 0x18 /* not yet parsed */ 356d49e1aeSJan Lentfer #define ASN1_TAG_GRAPHICSTRING 0x19 /* not yet parsed */ 366d49e1aeSJan Lentfer #define ASN1_TAG_VISIBLESTRING 0x1A 376d49e1aeSJan Lentfer #define ASN1_TAG_GENERALSTRING 0x1B /* not yet parsed */ 386d49e1aeSJan Lentfer #define ASN1_TAG_UNIVERSALSTRING 0x1C /* not yet parsed */ 39*a1157835SDaniel Fojt #define ASN1_TAG_CHARACTERSTRING 0x1D /* not yet parsed */ 40*a1157835SDaniel Fojt #define ASN1_TAG_BMPSTRING 0x1E /* not yet parsed */ 416d49e1aeSJan Lentfer 426d49e1aeSJan Lentfer #define ASN1_CLASS_UNIVERSAL 0 436d49e1aeSJan Lentfer #define ASN1_CLASS_APPLICATION 1 446d49e1aeSJan Lentfer #define ASN1_CLASS_CONTEXT_SPECIFIC 2 456d49e1aeSJan Lentfer #define ASN1_CLASS_PRIVATE 3 466d49e1aeSJan Lentfer 476d49e1aeSJan Lentfer 486d49e1aeSJan Lentfer struct asn1_hdr { 496d49e1aeSJan Lentfer const u8 *payload; 506d49e1aeSJan Lentfer u8 identifier, class, constructed; 516d49e1aeSJan Lentfer unsigned int tag, length; 526d49e1aeSJan Lentfer }; 536d49e1aeSJan Lentfer 546d49e1aeSJan Lentfer #define ASN1_MAX_OID_LEN 20 556d49e1aeSJan Lentfer struct asn1_oid { 566d49e1aeSJan Lentfer unsigned long oid[ASN1_MAX_OID_LEN]; 576d49e1aeSJan Lentfer size_t len; 586d49e1aeSJan Lentfer }; 596d49e1aeSJan Lentfer 606d49e1aeSJan Lentfer 616d49e1aeSJan Lentfer int asn1_get_next(const u8 *buf, size_t len, struct asn1_hdr *hdr); 623ff40c12SJohn Marino int asn1_parse_oid(const u8 *buf, size_t len, struct asn1_oid *oid); 636d49e1aeSJan Lentfer int asn1_get_oid(const u8 *buf, size_t len, struct asn1_oid *oid, 646d49e1aeSJan Lentfer const u8 **next); 65*a1157835SDaniel Fojt void asn1_oid_to_str(const struct asn1_oid *oid, char *buf, size_t len); 666d49e1aeSJan Lentfer unsigned long asn1_bit_string_to_long(const u8 *buf, size_t len); 67*a1157835SDaniel Fojt int asn1_oid_equal(const struct asn1_oid *a, const struct asn1_oid *b); 68*a1157835SDaniel Fojt 69*a1157835SDaniel Fojt extern struct asn1_oid asn1_sha1_oid; 70*a1157835SDaniel Fojt extern struct asn1_oid asn1_sha256_oid; 716d49e1aeSJan Lentfer 726d49e1aeSJan Lentfer #endif /* ASN1_H */ 73