2 * Copyright (c) 2003-2017 Lev Walkin <vlm@lionet.info>. All rights reserved.
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3 * Redistribution and modifications are permitted subject to BSD license.
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5 #ifndef _DER_ENCODER_H_
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6 #define _DER_ENCODER_H_
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8 #include <asn_application.h>
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14 struct asn_TYPE_descriptor_s; /* Forward declaration */
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17 * The DER encoder of any type. May be invoked by the application.
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18 * Produces DER- and BER-compliant encoding. (DER is a subset of BER).
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20 * NOTE: Use the ber_decode() function (ber_decoder.h) to decode data
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21 * produced by der_encode().
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23 asn_enc_rval_t der_encode(const struct asn_TYPE_descriptor_s *type_descriptor,
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24 const void *struct_ptr, /* Structure to be encoded */
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25 asn_app_consume_bytes_f *consume_bytes_cb,
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26 void *app_key /* Arbitrary callback argument */
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29 /* A variant of der_encode() which encodes data into the pre-allocated buffer */
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30 asn_enc_rval_t der_encode_to_buffer(
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31 const struct asn_TYPE_descriptor_s *type_descriptor,
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32 const void *struct_ptr, /* Structure to be encoded */
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33 void *buffer, /* Pre-allocated buffer */
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34 size_t buffer_size /* Initial buffer size (maximum) */
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38 * Type of the generic DER encoder.
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40 typedef asn_enc_rval_t(der_type_encoder_f)(
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41 const struct asn_TYPE_descriptor_s *type_descriptor,
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42 const void *struct_ptr, /* Structure to be encoded */
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43 int tag_mode, /* {-1,0,1}: IMPLICIT, no, EXPLICIT */
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44 ber_tlv_tag_t tag, asn_app_consume_bytes_f *consume_bytes_cb, /* Callback */
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45 void *app_key /* Arbitrary callback argument */
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49 /*******************************
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50 * INTERNALLY USEFUL FUNCTIONS *
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51 *******************************/
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54 * Write out leading TL[v] sequence according to the type definition.
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56 ssize_t der_write_tags(const struct asn_TYPE_descriptor_s *type_descriptor,
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57 size_t struct_length,
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58 int tag_mode, /* {-1,0,1}: IMPLICIT, no, EXPLICIT */
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59 int last_tag_form, /* {0,!0}: prim, constructed */
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61 asn_app_consume_bytes_f *consume_bytes_cb,
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68 #endif /* _DER_ENCODER_H_ */
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