1/* 2 Unix SMB/CIFS implementation. 3 simple ASN1 code 4 Copyright (C) Andrew Tridgell 2001 5 6 This program is free software; you can redistribute it and/or modify 7 it under the terms of the GNU General Public License as published by 8 the Free Software Foundation; either version 3 of the License, or 9 (at your option) any later version. 10 11 This program is distributed in the hope that it will be useful, 12 but WITHOUT ANY WARRANTY; without even the implied warranty of 13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14 GNU General Public License for more details. 15 16 You should have received a copy of the GNU General Public License 17 along with this program. If not, see <http://www.gnu.org/licenses/>. 18*/ 19 20#ifndef _ASN_1_H 21#define _ASN_1_H 22 23struct nesting { 24 off_t start; 25 size_t taglen; /* for parsing */ 26 struct nesting *next; 27}; 28 29struct asn1_data { 30 uint8_t *data; 31 size_t length; 32 off_t ofs; 33 struct nesting *nesting; 34 bool has_error; 35}; 36 37typedef struct asn1_data ASN1_DATA; 38 39#define ASN1_APPLICATION(x) ((x)+0x60) 40#define ASN1_APPLICATION_SIMPLE(x) ((x)+0x40) 41#define ASN1_SEQUENCE(x) ((x)+0x30) 42#define ASN1_CONTEXT(x) ((x)+0xa0) 43#define ASN1_CONTEXT_SIMPLE(x) ((x)+0x80) 44#define ASN1_GENERAL_STRING 0x1b 45#define ASN1_OCTET_STRING 0x4 46#define ASN1_OID 0x6 47#define ASN1_BOOLEAN 0x1 48#define ASN1_INTEGER 0x2 49#define ASN1_BIT_STRING 0x3 50#define ASN1_ENUMERATED 0xa 51#define ASN1_SET 0x31 52 53#define ASN1_MAX_OIDS 20 54 55struct asn1_data *asn1_init(TALLOC_CTX *mem_ctx); 56void asn1_free(struct asn1_data *data); 57bool asn1_write(struct asn1_data *data, const void *p, int len); 58bool asn1_write_uint8(struct asn1_data *data, uint8_t v); 59bool asn1_push_tag(struct asn1_data *data, uint8_t tag); 60bool asn1_pop_tag(struct asn1_data *data); 61bool asn1_write_implicit_Integer(struct asn1_data *data, int i); 62bool asn1_write_Integer(struct asn1_data *data, int i); 63bool asn1_write_BitString(struct asn1_data *data, const void *p, size_t length, uint8_t padding); 64bool ber_write_OID_String(DATA_BLOB *blob, const char *OID); 65bool asn1_write_OID(struct asn1_data *data, const char *OID); 66bool asn1_write_OctetString(struct asn1_data *data, const void *p, size_t length); 67bool asn1_write_LDAPString(struct asn1_data *data, const char *s); 68bool asn1_write_DATA_BLOB_LDAPString(struct asn1_data *data, const DATA_BLOB *s); 69bool asn1_write_GeneralString(struct asn1_data *data, const char *s); 70bool asn1_write_ContextSimple(struct asn1_data *data, uint8_t num, DATA_BLOB *blob); 71bool asn1_write_BOOLEAN(struct asn1_data *data, bool v); 72bool asn1_read_BOOLEAN(struct asn1_data *data, bool *v); 73bool asn1_check_BOOLEAN(struct asn1_data *data, bool v); 74bool asn1_write_BOOLEAN_context(struct asn1_data *data, bool v, int context); 75bool asn1_read_BOOLEAN_context(struct asn1_data *data, bool *v, int context); 76bool asn1_load(struct asn1_data *data, DATA_BLOB blob); 77bool asn1_peek(struct asn1_data *data, void *p, int len); 78bool asn1_read(struct asn1_data *data, void *p, int len); 79bool asn1_read_uint8(struct asn1_data *data, uint8_t *v); 80bool asn1_peek_uint8(struct asn1_data *data, uint8_t *v); 81bool asn1_peek_tag(struct asn1_data *data, uint8_t tag); 82bool asn1_start_tag(struct asn1_data *data, uint8_t tag); 83bool asn1_end_tag(struct asn1_data *data); 84int asn1_tag_remaining(struct asn1_data *data); 85bool ber_read_OID_String(TALLOC_CTX *mem_ctx, DATA_BLOB blob, const char **OID); 86bool asn1_read_OID(struct asn1_data *data, TALLOC_CTX *mem_ctx, const char **OID); 87bool asn1_check_OID(struct asn1_data *data, const char *OID); 88bool asn1_read_LDAPString(struct asn1_data *data, TALLOC_CTX *mem_ctx, char **s); 89bool asn1_read_GeneralString(struct asn1_data *data, TALLOC_CTX *mem_ctx, char **s); 90bool asn1_read_OctetString(struct asn1_data *data, TALLOC_CTX *mem_ctx, DATA_BLOB *blob); 91bool asn1_read_ContextSimple(struct asn1_data *data, uint8_t num, DATA_BLOB *blob); 92bool asn1_read_implicit_Integer(struct asn1_data *data, int *i); 93bool asn1_read_Integer(struct asn1_data *data, int *i); 94bool asn1_read_BitString(struct asn1_data *data, TALLOC_CTX *mem_ctx, DATA_BLOB *blob, uint8_t *padding); 95bool asn1_read_enumerated(struct asn1_data *data, int *v); 96bool asn1_check_enumerated(struct asn1_data *data, int v); 97bool asn1_write_enumerated(struct asn1_data *data, uint8_t v); 98bool asn1_blob(const struct asn1_data *asn1, DATA_BLOB *blob); 99void asn1_load_nocopy(struct asn1_data *data, uint8_t *buf, size_t len); 100NTSTATUS asn1_full_tag(DATA_BLOB blob, uint8_t tag, size_t *packet_size); 101 102#endif /* _ASN_1_H */ 103