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Diffstat (limited to 'src/libstrongswan/asn1/asn1.h')
| -rw-r--r-- | src/libstrongswan/asn1/asn1.h | 135 |
1 files changed, 135 insertions, 0 deletions
diff --git a/src/libstrongswan/asn1/asn1.h b/src/libstrongswan/asn1/asn1.h new file mode 100644 index 000000000..5ab519ec8 --- /dev/null +++ b/src/libstrongswan/asn1/asn1.h @@ -0,0 +1,135 @@ +/* Simple ASN.1 parser + * Copyright (C) 2000-2004 Andreas Steffen, Zuercher Hochschule Winterthur + * Copyright (C) 2006 Martin Will, Hochschule fuer Technik Rapperswil + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License as published by the + * Free Software Foundation; either version 2 of the License, or (at your + * option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY + * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License + * for more details. + */ + +#ifndef _ASN1_H +#define _ASN1_H + +#include <stdarg.h> +#include <gmp.h> + +#include <library.h> +#include <asn1/oid.h> + + +/* Defines some primitive ASN1 types */ +typedef enum { + ASN1_EOC = 0x00, + ASN1_BOOLEAN = 0x01, + ASN1_INTEGER = 0x02, + ASN1_BIT_STRING = 0x03, + ASN1_OCTET_STRING = 0x04, + ASN1_NULL = 0x05, + ASN1_OID = 0x06, + ASN1_ENUMERATED = 0x0A, + ASN1_UTF8STRING = 0x0C, + ASN1_NUMERICSTRING = 0x12, + ASN1_PRINTABLESTRING = 0x13, + ASN1_T61STRING = 0x14, + ASN1_VIDEOTEXSTRING = 0x15, + ASN1_IA5STRING = 0x16, + ASN1_UTCTIME = 0x17, + ASN1_GENERALIZEDTIME = 0x18, + ASN1_GRAPHICSTRING = 0x19, + ASN1_VISIBLESTRING = 0x1A, + ASN1_GENERALSTRING = 0x1B, + ASN1_UNIVERSALSTRING = 0x1C, + ASN1_BMPSTRING = 0x1E, + + ASN1_CONSTRUCTED = 0x20, + + ASN1_SEQUENCE = 0x30, + + ASN1_SET = 0x31, + + ASN1_CONTEXT_S_0 = 0x80, + ASN1_CONTEXT_S_1 = 0x81, + ASN1_CONTEXT_S_2 = 0x82, + ASN1_CONTEXT_S_3 = 0x83, + ASN1_CONTEXT_S_4 = 0x84, + ASN1_CONTEXT_S_5 = 0x85, + ASN1_CONTEXT_S_6 = 0x86, + ASN1_CONTEXT_S_7 = 0x87, + ASN1_CONTEXT_S_8 = 0x88, + + ASN1_CONTEXT_C_0 = 0xA0, + ASN1_CONTEXT_C_1 = 0xA1, + ASN1_CONTEXT_C_2 = 0xA2, + ASN1_CONTEXT_C_3 = 0xA3, + ASN1_CONTEXT_C_4 = 0xA4, + ASN1_CONTEXT_C_5 = 0xA5 +} asn1_t; + +/* Definition of ASN1 flags */ + +#define ASN1_NONE 0x00 +#define ASN1_DEF 0x01 +#define ASN1_OPT 0x02 +#define ASN1_LOOP 0x04 +#define ASN1_END 0x08 +#define ASN1_OBJ 0x10 +#define ASN1_BODY 0x20 +#define ASN1_RAW 0x40 + +#define ASN1_INVALID_LENGTH 0xffffffff + +/* definition of an ASN.1 object */ + +typedef struct { + u_int level; + const u_char *name; + asn1_t type; + u_char flags; +} asn1Object_t; + +#define ASN1_MAX_LEVEL 10 + +typedef struct { + bool implicit; + bool private; + u_int level0; + u_int loopAddr[ASN1_MAX_LEVEL+1]; + chunk_t blobs[ASN1_MAX_LEVEL+2]; +} asn1_ctx_t; + +/* some common prefabricated ASN.1 constants */ +extern const chunk_t ASN1_INTEGER_0; +extern const chunk_t ASN1_INTEGER_1; +extern const chunk_t ASN1_INTEGER_2; + +/* some popular algorithmIdentifiers */ +extern const chunk_t ASN1_md5_id; +extern const chunk_t ASN1_sha1_id; +extern const chunk_t ASN1_rsaEncryption_id; +extern const chunk_t ASN1_md5WithRSA_id; +extern const chunk_t ASN1_sha1WithRSA_id; + +extern chunk_t asn1_algorithmIdentifier(int oid); +extern int known_oid(chunk_t object); +extern u_int asn1_length(chunk_t *blob); +extern bool is_printablestring(chunk_t str); +extern time_t asn1totime(const chunk_t *utctime, asn1_t type); +extern void asn1_init(asn1_ctx_t *ctx, chunk_t blob, u_int level0, bool implicit, bool private); +extern bool extract_object(asn1Object_t const *objects, u_int *objectID, chunk_t *object, u_int *level, asn1_ctx_t *ctx); +extern bool parse_asn1_simple_object(chunk_t *object, asn1_t type, u_int level, const char* name); +extern int parse_algorithmIdentifier(chunk_t blob, int level0, chunk_t *parameters); +extern bool is_asn1(chunk_t blob); + +extern void code_asn1_length(size_t length, chunk_t *code); +extern u_char* build_asn1_object(chunk_t *object, asn1_t type, size_t datalen); +extern chunk_t asn1_integer_from_mpz(const mpz_t value); +extern chunk_t asn1_simple_object(asn1_t tag, chunk_t content); +extern chunk_t asn1_wrap(asn1_t type, const char *mode, ...); + +#endif /* _ASN1_H */ |