116 lines
3.1 KiB
C++
116 lines
3.1 KiB
C++
/* -*- c++ -*- */
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/*
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* Copyright 2023 jmfriedt.
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*
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* SPDX-License-Identifier: GPL-3.0-or-later
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*/
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#ifndef INCLUDED_M17_M17_CODER_IMPL_H
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#define INCLUDED_M17_M17_CODER_IMPL_H
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#define AES
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#define ECC
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#include <gnuradio/m17/m17_coder.h>
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#include "m17.h" // lsf_t declaration
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#ifdef AES
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#include "aes.h"
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#endif
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#ifdef ECC
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#include "uECC.h"
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#endif
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namespace gr
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{
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namespace m17
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{
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class m17_coder_impl:public m17_coder
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{
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private:
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unsigned char _src_id[10], _dst_id[10]; // 9 character callsign
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int _mode, _data;
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//encryption
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#ifdef AES
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//encryption
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const struct uECC_Curve_t *_curve = uECC_secp256r1 ();
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encr_t _encr_type = ENCR_NONE;
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//AES
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typedef enum
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{
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AES128,
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AES192,
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AES256
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} aes_t;
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uint8_t _key[32];
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uint8_t _iv[16];
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time_t epoch = 1577836800L; //Jan 1, 2020, 00:00:00 UTC
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#endif
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int _encr_subtype, _can;
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lsf_t _lsf, _next_lsf;
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std::string _meta;
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int _got_lsf = 0;
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uint16_t _fn = 0; //16-bit Frame Number (for the stream mode)
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uint8_t _lich_cnt = 0; //0..5 LICH counter, derived from the Frame Number
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bool _debug = 0;
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bool _signed_str = false, _finished = false;
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uint8_t _digest[16] = { 0 }; //16-byte field for the stream digest
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bool _priv_key_loaded = false; //do we have a sig key loaded?
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uint8_t _priv_key[32] = { 0 }; //private key
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uint8_t _sig[64] = { 0 }; //ECDSA signature
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bool _init_frame;
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#ifdef ECC
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//Scrambler
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uint8_t _seed[3]; //24-bit is the largest seed value
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uint8_t _scr_bytes[16];
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uint8_t _scrambler_pn[128];
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uint32_t _scrambler_seed = 0;
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int8_t _scrambler_subtype = -1;
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#endif
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public:
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void parse_raw_key_string (uint8_t *, const char *);
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void scrambler_sequence_generator ();
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void set_src_id (std::string src_id);
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void set_dst_id (std::string dst_id);
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void set_key (std::string key);
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void set_priv_key (std::string key);
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void set_meta (std::string meta);
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void set_seed (std::string meta);
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void set_type (int mode, int data, encr_t encr_type, int encr_subtype,
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int can);
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void set_mode (int mode);
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void set_data (int data);
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void set_encr_type (int encr_type);
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void set_encr_subtype (int encr_subtype);
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void set_can (int can);
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void set_debug (bool debug);
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void set_signed (bool signed_str);
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void end_of_transmission(const pmt::pmt_t& msg);
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m17_coder_impl (std::string src_id, std::string dst_id, int mode,
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int data, int encr_type, int encr_subtype, int can,
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std::string meta, std::string key, std::string priv_key,
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bool debug, bool signed_str, std::string seed);
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~m17_coder_impl ();
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// Where all the action really happens
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void forecast (int noutput_items,
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gr_vector_int & ninput_items_required);
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int general_work (int noutput_items,
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gr_vector_int & ninput_items,
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gr_vector_const_void_star & input_items,
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gr_vector_void_star & output_items);
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};
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} // namespace m17
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} // namespace gr
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#endif /* INCLUDED_M17_M17_CODER_IMPL_H */
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