18d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt/* 28d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * ASN.1 DER parsing 38d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * Copyright (c) 2006, Jouni Malinen <j@w1.fi> 48d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * 5c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt * This software may be distributed under the terms of the BSD license. 6c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt * See README for more details. 78d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt */ 88d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 98d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt#ifndef ASN1_H 108d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt#define ASN1_H 118d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 128d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt#define ASN1_TAG_EOC 0x00 /* not used with DER */ 138d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt#define ASN1_TAG_BOOLEAN 0x01 148d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt#define ASN1_TAG_INTEGER 0x02 158d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt#define ASN1_TAG_BITSTRING 0x03 168d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt#define ASN1_TAG_OCTETSTRING 0x04 178d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt#define ASN1_TAG_NULL 0x05 188d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt#define ASN1_TAG_OID 0x06 198d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt#define ASN1_TAG_OBJECT_DESCRIPTOR 0x07 /* not yet parsed */ 208d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt#define ASN1_TAG_EXTERNAL 0x08 /* not yet parsed */ 218d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt#define ASN1_TAG_REAL 0x09 /* not yet parsed */ 228d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt#define ASN1_TAG_ENUMERATED 0x0A /* not yet parsed */ 231b46775bb44f06b3cc285481ff5f7a673559ed7dDmitry Shmidt#define ASN1_TAG_EMBEDDED_PDV 0x0B /* not yet parsed */ 248d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt#define ASN1_TAG_UTF8STRING 0x0C /* not yet parsed */ 258d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt#define ANS1_TAG_RELATIVE_OID 0x0D 268d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt#define ASN1_TAG_SEQUENCE 0x10 /* shall be constructed */ 278d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt#define ASN1_TAG_SET 0x11 288d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt#define ASN1_TAG_NUMERICSTRING 0x12 /* not yet parsed */ 298d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt#define ASN1_TAG_PRINTABLESTRING 0x13 308d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt#define ASN1_TAG_TG1STRING 0x14 /* not yet parsed */ 318d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt#define ASN1_TAG_VIDEOTEXSTRING 0x15 /* not yet parsed */ 328d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt#define ASN1_TAG_IA5STRING 0x16 338d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt#define ASN1_TAG_UTCTIME 0x17 348d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt#define ASN1_TAG_GENERALIZEDTIME 0x18 /* not yet parsed */ 358d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt#define ASN1_TAG_GRAPHICSTRING 0x19 /* not yet parsed */ 368d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt#define ASN1_TAG_VISIBLESTRING 0x1A 378d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt#define ASN1_TAG_GENERALSTRING 0x1B /* not yet parsed */ 388d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt#define ASN1_TAG_UNIVERSALSTRING 0x1C /* not yet parsed */ 391b46775bb44f06b3cc285481ff5f7a673559ed7dDmitry Shmidt#define ASN1_TAG_CHARACTERSTRING 0x1D /* not yet parsed */ 401b46775bb44f06b3cc285481ff5f7a673559ed7dDmitry Shmidt#define ASN1_TAG_BMPSTRING 0x1E /* not yet parsed */ 418d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 428d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt#define ASN1_CLASS_UNIVERSAL 0 438d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt#define ASN1_CLASS_APPLICATION 1 448d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt#define ASN1_CLASS_CONTEXT_SPECIFIC 2 458d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt#define ASN1_CLASS_PRIVATE 3 468d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 478d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 488d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidtstruct asn1_hdr { 498d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt const u8 *payload; 508d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt u8 identifier, class, constructed; 518d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt unsigned int tag, length; 528d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt}; 538d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 548d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt#define ASN1_MAX_OID_LEN 20 558d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidtstruct asn1_oid { 568d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt unsigned long oid[ASN1_MAX_OID_LEN]; 578d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt size_t len; 588d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt}; 598d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 608d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 618d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidtint asn1_get_next(const u8 *buf, size_t len, struct asn1_hdr *hdr); 628d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidtint asn1_parse_oid(const u8 *buf, size_t len, struct asn1_oid *oid); 638d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidtint asn1_get_oid(const u8 *buf, size_t len, struct asn1_oid *oid, 648d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt const u8 **next); 6550b691dc36a8075e8f594e8bea93cb524fa6b1d2Dmitry Shmidtvoid asn1_oid_to_str(const struct asn1_oid *oid, char *buf, size_t len); 668d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidtunsigned long asn1_bit_string_to_long(const u8 *buf, size_t len); 6750b691dc36a8075e8f594e8bea93cb524fa6b1d2Dmitry Shmidtint asn1_oid_equal(const struct asn1_oid *a, const struct asn1_oid *b); 6850b691dc36a8075e8f594e8bea93cb524fa6b1d2Dmitry Shmidt 6950b691dc36a8075e8f594e8bea93cb524fa6b1d2Dmitry Shmidtextern struct asn1_oid asn1_sha1_oid; 7050b691dc36a8075e8f594e8bea93cb524fa6b1d2Dmitry Shmidtextern struct asn1_oid asn1_sha256_oid; 718d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 728d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt#endif /* ASN1_H */ 73