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  * The ber_decode() function (ber_decoder.h) is an opposite of der_encode().
  19  */
  20 asn_enc_rval_t der_encode(struct asn_TYPE_descriptor_s *type_descriptor,
  21                 void *struct_ptr,       /* Structure to be encoded */
  22                 asn_app_consume_bytes_f *consume_bytes_cb,
  23                 void *app_key           /* Arbitrary callback argument */
  24         );
  25
  26 /* A variant of der_encode() which encodes data into the pre-allocated buffer */
  27 asn_enc_rval_t der_encode_to_buffer(
  28                 struct asn_TYPE_descriptor_s *type_descriptor,
  29                 void *struct_ptr,       /* Structure to be encoded */
  30                 void *buffer,           /* Pre-allocated buffer */
  31                 size_t buffer_size      /* Initial buffer size (maximum) */
  32         );
  33
  34 /*
  35  * Type of the generic DER encoder.
  36  */
  37 typedef asn_enc_rval_t (der_type_encoder_f)(
  38                 struct asn_TYPE_descriptor_s *type_descriptor,
  39                 void *struct_ptr,       /* Structure to be encoded */
  40                 int tag_mode,           /* {-1,0,1}: IMPLICIT, no, EXPLICIT */
  41                 ber_tlv_tag_t tag,
  42                 asn_app_consume_bytes_f *consume_bytes_cb,      /* Callback */
  43                 void *app_key           /* Arbitrary callback argument */
  44         );
  45
  46
  47 /*******************************
  48  * INTERNALLY USEFUL FUNCTIONS *
  49  *******************************/
  50
  51 /*
  52  * Write out leading TL[v] sequence according to the type definition.
  53  */
  54 ssize_t der_write_tags(
  55                 struct asn_TYPE_descriptor_s *type_descriptor,
  56                 size_t struct_length,
  57                 int tag_mode,           /* {-1,0,1}: IMPLICIT, no, EXPLICIT */
  58                 int last_tag_form,      /* {0,!0}: prim, constructed */
  59                 ber_tlv_tag_t tag,
  60                 asn_app_consume_bytes_f *consume_bytes_cb,
  61                 void *app_key
  62         );
  63
  64 #ifdef __cplusplus
  65 }
  66 #endif
  67
  68 #endif  /* _DER_ENCODER_H_ */