lib/util/asn1.h

   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
  23 struct nesting {
  24         off_t start;
  25         size_t taglen; /* for parsing */
  26         struct nesting *next;
  27 };
  28
  29 struct asn1_data {
  30         uint8_t *data;
  31         size_t length;
  32         off_t ofs;
  33         struct nesting *nesting;
  34         bool has_error;
  35 };
  36
  37 typedef 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_BITFIELD 0x3
  50 #define ASN1_ENUMERATED 0xa
  51 #define ASN1_SET 0x31
  52
  53 #define ASN1_MAX_OIDS 20
  54
  55 struct asn1_data *asn1_init(TALLOC_CTX *mem_ctx);
  56 void asn1_free(struct asn1_data *data);
  57 bool asn1_write(struct asn1_data *data, const void *p, int len);
  58 bool asn1_write_uint8(struct asn1_data *data, uint8_t v);
  59 bool asn1_push_tag(struct asn1_data *data, uint8_t tag);
  60 bool asn1_pop_tag(struct asn1_data *data);
  61 bool asn1_write_implicit_Integer(struct asn1_data *data, int i);
  62 bool asn1_write_Integer(struct asn1_data *data, int i);
  63 bool ber_write_OID_String(DATA_BLOB *blob, const char *OID);
  64 bool asn1_write_OID(struct asn1_data *data, const char *OID);
  65 bool asn1_write_OctetString(struct asn1_data *data, const void *p, size_t length);
  66 bool asn1_write_LDAPString(struct asn1_data *data, const char *s);
  67 bool asn1_write_DATA_BLOB_LDAPString(struct asn1_data *data, const DATA_BLOB *s);
  68 bool asn1_write_GeneralString(struct asn1_data *data, const char *s);
  69 bool asn1_write_ContextSimple(struct asn1_data *data, uint8_t num, DATA_BLOB *blob);
  70 bool asn1_write_BOOLEAN(struct asn1_data *data, bool v);
  71 bool asn1_read_BOOLEAN(struct asn1_data *data, bool *v);
  72 bool asn1_check_BOOLEAN(struct asn1_data *data, bool v);
  73 bool asn1_load(struct asn1_data *data, DATA_BLOB blob);
  74 bool asn1_peek(struct asn1_data *data, void *p, int len);
  75 bool asn1_read(struct asn1_data *data, void *p, int len);
  76 bool asn1_read_uint8(struct asn1_data *data, uint8_t *v);
  77 bool asn1_peek_uint8(struct asn1_data *data, uint8_t *v);
  78 bool asn1_peek_tag(struct asn1_data *data, uint8_t tag);
  79 bool asn1_start_tag(struct asn1_data *data, uint8_t tag);
  80 bool asn1_end_tag(struct asn1_data *data);
  81 int asn1_tag_remaining(struct asn1_data *data);
  82 bool ber_read_OID_String(TALLOC_CTX *mem_ctx, DATA_BLOB blob, const char **OID);
  83 bool asn1_read_OID(struct asn1_data *data, TALLOC_CTX *mem_ctx, const char **OID);
  84 bool asn1_check_OID(struct asn1_data *data, const char *OID);
  85 bool asn1_read_LDAPString(struct asn1_data *data, TALLOC_CTX *mem_ctx, char **s);
  86 bool asn1_read_GeneralString(struct asn1_data *data, TALLOC_CTX *mem_ctx, char **s);
  87 bool asn1_read_OctetString(struct asn1_data *data, TALLOC_CTX *mem_ctx, DATA_BLOB *blob);
  88 bool asn1_read_ContextSimple(struct asn1_data *data, uint8_t num, DATA_BLOB *blob);
  89 bool asn1_read_implicit_Integer(struct asn1_data *data, int *i);
  90 bool asn1_read_Integer(struct asn1_data *data, int *i);
  91 bool asn1_read_enumerated(struct asn1_data *data, int *v);
  92 bool asn1_check_enumerated(struct asn1_data *data, int v);
  93 bool asn1_write_enumerated(struct asn1_data *data, uint8_t v);
  94 NTSTATUS asn1_full_tag(DATA_BLOB blob, uint8_t tag, size_t *packet_size);
  95
  96 #endif /* _ASN_1_H */