libs/smux/include/stg/der_encoder.h

   1 /*-
   2  * Copyright (c) 2003, 2004 Lev Walkin <vlm@lionet.info>. All rights reserved.
   3  * Redistribution and modifications are permitted subject to BSD license.
   4  */
   5 #ifndef _DER_ENCODER_H_
   6 #define _DER_ENCODER_H_
   7
   8 #include <asn_application.h>
   9
  10 #ifdef __cplusplus
  11 extern "C" {
  12 #endif
  13
  14 struct asn_TYPE_descriptor_s;   /* Forward declaration */
  15
  16 /*
  17  * The DER encoder of any type. May be invoked by the application.
  18  */
  19 asn_enc_rval_t der_encode(struct asn_TYPE_descriptor_s *type_descriptor,
  20                 void *struct_ptr,       /* Structure to be encoded */
  21                 asn_app_consume_bytes_f *consume_bytes_cb,
  22                 void *app_key           /* Arbitrary callback argument */
  23         );
  24
  25 /* A variant of der_encode() which encodes data into the pre-allocated buffer */
  26 asn_enc_rval_t der_encode_to_buffer(
  27                 struct asn_TYPE_descriptor_s *type_descriptor,
  28                 void *struct_ptr,       /* Structure to be encoded */
  29                 void *buffer,           /* Pre-allocated buffer */
  30                 size_t buffer_size      /* Initial buffer size (maximum) */
  31         );
  32
  33 /*
  34  * Type of the generic DER encoder.
  35  */
  36 typedef asn_enc_rval_t (der_type_encoder_f)(
  37                 struct asn_TYPE_descriptor_s *type_descriptor,
  38                 void *struct_ptr,       /* Structure to be encoded */
  39                 int tag_mode,           /* {-1,0,1}: IMPLICIT, no, EXPLICIT */
  40                 ber_tlv_tag_t tag,
  41                 asn_app_consume_bytes_f *consume_bytes_cb,      /* Callback */
  42                 void *app_key           /* Arbitrary callback argument */
  43         );
  44
  45
  46 /*******************************
  47  * INTERNALLY USEFUL FUNCTIONS *
  48  *******************************/
  49
  50 /*
  51  * Write out leading TL[v] sequence according to the type definition.
  52  */
  53 ssize_t der_write_tags(
  54                 struct asn_TYPE_descriptor_s *type_descriptor,
  55                 size_t struct_length,
  56                 int tag_mode,           /* {-1,0,1}: IMPLICIT, no, EXPLICIT */
  57                 int last_tag_form,      /* {0,!0}: prim, constructed */
  58                 ber_tlv_tag_t tag,
  59                 asn_app_consume_bytes_f *consume_bytes_cb,
  60                 void *app_key
  61         );
  62
  63 #ifdef __cplusplus
  64 }
  65 #endif
  66
  67 #endif  /* _DER_ENCODER_H_ */