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DMR: RAS Implementation; #369

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RAS Implementation includes converting RAS 6-24 character passwords into 56-bit RAS Effective Key Values and Performing RAS Permutations on RAS Enabled Burst Types to Calculate the Correct MAC attachment to validate messages;

Better Handling for RAS indicators found in BPTC 196,96 Reserved Bits and handling for RAS indicator bits found in embedded link control opcode byte;

Users may either enter the RAS password with the -$ option, or the 56-bit effective key value with the -y option.

Users will no longer need to use the -F option to bypass CRC errors on RAS enabled payloads when FEC does not explicitely fail.

Removed the old float audio -y option.
This commit is contained in:
lwvmobile
2026-09-01 13:29:55 -04:00
parent 198f0eacb5
commit cc6711fe4d
11 changed files with 815 additions and 107 deletions
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17
include/dsd.h
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@@ -918,6 +918,12 @@ typedef struct
//Remus DMR End Call Alert Beep
int dmr_end_alert[2]; //dmr TLC end call alert beep has already played once flag
//RAS Key Variables
// #define DEBUG_RAS
unsigned long long int ras_effective_key;
int ras_permutation_order[104];
uint8_t dmr_is_ras; //indicate a partial or complete RAS enabled system
//Bitmap Filtering Options
int audio_smoothing;
@@ -1358,11 +1364,13 @@ int32_t GetdPmrColorCode(uint8_t ChannelCodeBit[24]);
//BPTC (Block Product Turbo Code) functions
void BPTCDeInterleaveDMRData(uint8_t * Input, uint8_t * Output);
uint32_t BPTC_196x96_Extract_Data(uint8_t InputDeInteleavedData[196], uint8_t DMRDataExtracted[96], uint8_t R[3]);
uint32_t BPTC_196x96_Extract_Data(uint8_t InputDeInteleavedData[196], uint8_t DMRDataExtracted[96], uint8_t R[3], uint8_t * is_ras);
uint32_t BPTC_128x77_Extract_Data(uint8_t InputDataMatrix[8][16], uint8_t DMRDataExtracted[77]);
uint32_t BPTC_16x2_Extract_Data(uint8_t InputInterleavedData[32], uint8_t DMRDataExtracted[32], uint32_t ParityCheckTypeOdd);
//Reed Solomon (12,9) functions
//Reed Solomon DMR functions
void rs_16_13_encode(uint8_t * input);
void rs_12_9_encode(uint8_t * input);
void rs_12_9_calc_syndrome(rs_12_9_codeword_t *codeword, rs_12_9_poly_t *syndrome);
uint8_t rs_12_9_check_syndrome(rs_12_9_poly_t *syndrome);
rs_12_9_correct_errors_result_t rs_12_9_correct_errors(rs_12_9_codeword_t *codeword, rs_12_9_poly_t *syndrome, uint8_t *errors_found);
@@ -1660,6 +1668,11 @@ void hytera_enhanced_rc4_setup(dsd_opts * opts, dsd_state * state, unsigned long
unsigned long long int hytera_lfsr(uint8_t * mi, uint8_t * taps, uint8_t len);
void hytera_enhanced_alg_refresh(dsd_state * state);
//RAS
uint32_t ras_mac_calculator(dsd_state * state, uint8_t * input, int input_len, int type);
void ras_effective_key_creation(dsd_state * state, char * input);
void ras_permute_order(uint32_t seed, int * order);
//LFSR to expand either a DMR 32-bit or P25/NXDN 64-bit MI into a 128-bit IV for AES
void lfsr_32_to_128(uint8_t * iv);
void lfsr_64_to_128(uint8_t * iv);