69 lines
2.3 KiB
C
69 lines
2.3 KiB
C
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/*-
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* Copyright (c) 2003-2017 Lev Walkin <vlm@lionet.info>. All rights reserved.
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* Redistribution and modifications are permitted subject to BSD license.
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*/
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#ifndef _DER_ENCODER_H_
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#define _DER_ENCODER_H_
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#include <asn_application.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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struct asn_TYPE_descriptor_s; /* Forward declaration */
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/*
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* The DER encoder of any type. May be invoked by the application.
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* Produces DER- and BER-compliant encoding. (DER is a subset of BER).
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*
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* NOTE: Use the ber_decode() function (ber_decoder.h) to decode data
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* produced by der_encode().
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*/
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asn_enc_rval_t der_encode(const struct asn_TYPE_descriptor_s *type_descriptor,
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const void *struct_ptr, /* Structure to be encoded */
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asn_app_consume_bytes_f *consume_bytes_cb,
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void *app_key /* Arbitrary callback argument */
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);
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/* A variant of der_encode() which encodes data into the pre-allocated buffer */
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asn_enc_rval_t der_encode_to_buffer(
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const struct asn_TYPE_descriptor_s *type_descriptor,
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const void *struct_ptr, /* Structure to be encoded */
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void *buffer, /* Pre-allocated buffer */
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size_t buffer_size /* Initial buffer size (maximum) */
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);
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/*
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* Type of the generic DER encoder.
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*/
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typedef asn_enc_rval_t(der_type_encoder_f)(
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const struct asn_TYPE_descriptor_s *type_descriptor,
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const void *struct_ptr, /* Structure to be encoded */
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int tag_mode, /* {-1,0,1}: IMPLICIT, no, EXPLICIT */
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ber_tlv_tag_t tag, asn_app_consume_bytes_f *consume_bytes_cb, /* Callback */
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void *app_key /* Arbitrary callback argument */
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);
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/*******************************
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* INTERNALLY USEFUL FUNCTIONS *
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*******************************/
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/*
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* Write out leading TL[v] sequence according to the type definition.
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*/
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ssize_t der_write_tags(const struct asn_TYPE_descriptor_s *type_descriptor,
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size_t struct_length,
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int tag_mode, /* {-1,0,1}: IMPLICIT, no, EXPLICIT */
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int last_tag_form, /* {0,!0}: prim, constructed */
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ber_tlv_tag_t tag,
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asn_app_consume_bytes_f *consume_bytes_cb,
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void *app_key);
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#ifdef __cplusplus
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}
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#endif
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#endif /* _DER_ENCODER_H_ */
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