1 /* 2 * ASN.1 DER parsing 3 * Copyright (c) 2006, Jouni Malinen <j@w1.fi> 4 * 5 * This program is free software; you can redistribute it and/or modify 6 * it under the terms of the GNU General Public License version 2 as 7 * published by the Free Software Foundation. 8 * 9 * Alternatively, this software may be distributed under the terms of BSD 10 * license. 11 * 12 * See README and COPYING for more details. 13 */ 14 15 #ifndef ASN1_H 16 #define ASN1_H 17 18 #define ASN1_TAG_EOC 0x00 /* not used with DER */ 19 #define ASN1_TAG_BOOLEAN 0x01 20 #define ASN1_TAG_INTEGER 0x02 21 #define ASN1_TAG_BITSTRING 0x03 22 #define ASN1_TAG_OCTETSTRING 0x04 23 #define ASN1_TAG_NULL 0x05 24 #define ASN1_TAG_OID 0x06 25 #define ASN1_TAG_OBJECT_DESCRIPTOR 0x07 /* not yet parsed */ 26 #define ASN1_TAG_EXTERNAL 0x08 /* not yet parsed */ 27 #define ASN1_TAG_REAL 0x09 /* not yet parsed */ 28 #define ASN1_TAG_ENUMERATED 0x0A /* not yet parsed */ 29 #define ASN1_TAG_UTF8STRING 0x0C /* not yet parsed */ 30 #define ANS1_TAG_RELATIVE_OID 0x0D 31 #define ASN1_TAG_SEQUENCE 0x10 /* shall be constructed */ 32 #define ASN1_TAG_SET 0x11 33 #define ASN1_TAG_NUMERICSTRING 0x12 /* not yet parsed */ 34 #define ASN1_TAG_PRINTABLESTRING 0x13 35 #define ASN1_TAG_TG1STRING 0x14 /* not yet parsed */ 36 #define ASN1_TAG_VIDEOTEXSTRING 0x15 /* not yet parsed */ 37 #define ASN1_TAG_IA5STRING 0x16 38 #define ASN1_TAG_UTCTIME 0x17 39 #define ASN1_TAG_GENERALIZEDTIME 0x18 /* not yet parsed */ 40 #define ASN1_TAG_GRAPHICSTRING 0x19 /* not yet parsed */ 41 #define ASN1_TAG_VISIBLESTRING 0x1A 42 #define ASN1_TAG_GENERALSTRING 0x1B /* not yet parsed */ 43 #define ASN1_TAG_UNIVERSALSTRING 0x1C /* not yet parsed */ 44 #define ASN1_TAG_BMPSTRING 0x1D /* not yet parsed */ 45 46 #define ASN1_CLASS_UNIVERSAL 0 47 #define ASN1_CLASS_APPLICATION 1 48 #define ASN1_CLASS_CONTEXT_SPECIFIC 2 49 #define ASN1_CLASS_PRIVATE 3 50 51 52 struct asn1_hdr { 53 const u8 *payload; 54 u8 identifier, class, constructed; 55 unsigned int tag, length; 56 }; 57 58 #define ASN1_MAX_OID_LEN 20 59 struct asn1_oid { 60 unsigned long oid[ASN1_MAX_OID_LEN]; 61 size_t len; 62 }; 63 64 65 int asn1_get_next(const u8 *buf, size_t len, struct asn1_hdr *hdr); 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(struct asn1_oid *oid, char *buf, size_t len); 69 unsigned long asn1_bit_string_to_long(const u8 *buf, size_t len); 70 71 #endif /* ASN1_H */ 72