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DMR: Retevis / Anytone AP (RC2) Encryption Support;

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lwvmobile
2025-09-11 22:49:22 -04:00
parent 9acd8c981e
commit 3aabd85604
6 changed files with 428 additions and 4 deletions
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8
include/dsd.h
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@@ -991,6 +991,9 @@ typedef struct
int tyt_ap;
int tyt_bp;
int tyt_ep;
// retrevis rc2
int retevis_ap;
void *rc2_context;
//kenwood scrambler on DMR with forced application
int ken_sc;
@@ -1629,12 +1632,11 @@ void aes_cfb_bytewise_payload_crypt (uint8_t * iv, uint8_t * key, uint8_t * in,
void aes_ctr_bytewise_payload_crypt (uint8_t * iv, uint8_t * key, uint8_t * payload, int type);
void aes_ctr_bitwise_payload_crypt (uint8_t * iv, uint8_t * key, uint8_t * payload, int type);
//Tytera Encryption Modes
//Tytera / Retevis / Anytone / Kenwood / Misc DMR Encryption Modes
void tyt16_ambe2_codeword_keystream(dsd_state * state, char ambe_fr[4][24], int fnum);
void tyt_ep_aes_keystream_creation(dsd_state * state, char * input);
void tyt_ap_pc4_keystream_creation(dsd_state * state, char * input);
//Misc Other Encryption Modes
void retevis_rc2_keystream_creation(dsd_state *state, char *input);
void ken_dmr_scrambler_keystream_creation(dsd_state * state, char * input);
void anytone_bp_keystream_creation(dsd_state * state, char * input);
void straight_mod_xor_keystream_creation(dsd_state * state, char * input);

43
include/rc2.h Normal file
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@@ -0,0 +1,43 @@
#ifndef RETEVIS_AP
#define RETEVIS_AP
#include <stdint.h>
#include "dsd.h"
#define n1 264
typedef struct {
uint8_t array_rc4[256];
int i_rc4, j_rc4;
uint64_t x;
uint8_t xyz, count;
uint64_t bb;
} RC4State;
typedef struct {
int x1, x2;
unsigned char h2[n1];
unsigned char h1[n1 * 3];
} MD2State;
typedef struct {
uint16_t xkey[64];
uint8_t plain[8];
uint8_t cipher[8];
} RC2State;
typedef struct {
RC4State rc4;
MD2State md2;
RC2State rc2;
uint64_t internal_state;
uint64_t internal_zero;
uint8_t keys[16];
} CryptoContext;
/* Public API */
void create_keys_rc2(CryptoContext* ctx, unsigned char key1[], size_t size1);
void encryption_rc2(CryptoContext* ctx, uint8_t s1[49]);
void decrypt_rc2(CryptoContext* ctx, uint8_t bits[49]);
#endif