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Add DES-OFB Decryption Support for P25, NXDN, DMR (Tested);

Add DES-XL Decryption Support for P25p1 (Tested);

Add AES-OFB Decryption Support for P25, DMR (Tested); NXDN(untested);

Add P25p1 PDU Decryption Support; (Untested)(Known Modes);

Add Remaining (AES, DES) DMR PDU Decryption Support (Known DMRA Modes)(Untested);

Decrypt Tytera 16-bit BP (works depending on model);

Add AES Keys example csv file for import;

Probably a few bugs that'll need to be massaged out now with all the code additions for several years of stashed code;
This commit is contained in:
lwvmobile
2025-03-14 23:54:58 -04:00
parent 9f59729fb1
commit eac360571e
28 changed files with 3752 additions and 197 deletions
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47
include/dsd.h
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@@ -596,6 +596,16 @@ typedef struct
unsigned long long int K4;
int M;
int menuopen;
//AES Key Segments
unsigned long long int A1[2];
unsigned long long int A2[2];
unsigned long long int A3[3];
unsigned long long int A4[4];
int aes_key_loaded[2];
//xl specific, we need to know if the ESS is from HDU, or from LDU2
int xl_is_hdu;
unsigned int debug_audio_errors;
unsigned int debug_audio_errorsR;
@@ -718,6 +728,23 @@ typedef struct
int DMRvcL;
int DMRvcR;
//keystream octet and bit arrays
uint8_t ks_octetL[129*18]; //arbitary size, but large enough for the largest packed PDUs
uint8_t ks_octetR[129*18]; //arbitary size, but large enough for the largest packed PDUs
uint8_t ks_bitstreamL[128*18*8]; //arbitary size, but large enough for the largest PDUs
uint8_t ks_bitstreamR[129*18*8]; //arbitary size, but large enough for the largest PDUs
int octet_counter;
long int bit_counterL;
long int bit_counterR;
//AES Specific Variables
uint8_t aes_key[32]; //was 64 for some reason
uint8_t aes_iv[16];
uint8_t aes_ivR[16];
//NXDN DES and AES, signal new VCALL_IV and new IV
uint8_t nxdn_new_iv; //1 when a new IV comes in, else 0
short int dmr_encL;
short int dmr_encR;
@@ -828,7 +855,7 @@ typedef struct
uint8_t nxdn_bw;
//multi-key array
unsigned long long int rkey_array[0xFFFF];
unsigned long long int rkey_array[0x1FFFF];
int keyloader; //let us know the keyloader is active
//dmr late entry mi
@@ -1477,9 +1504,25 @@ int udp_socket_connectM17(dsd_opts * opts, dsd_state * state);
int m17_socket_blaster(dsd_opts * opts, dsd_state * state, size_t nsam, void * data);
//RC4 function prototypes
void RC4(int drop, uint8_t keylength, uint8_t messagelength, uint8_t key[], uint8_t cipher[], uint8_t plain[]);
void rc4_voice_decrypt (int drop, uint8_t keylength, uint8_t messagelength, uint8_t key[], uint8_t cipher[], uint8_t plain[]);
void rc4_block_output (int drop, int keylen, int meslen, uint8_t * key, uint8_t * output_blocks);
//DES function prototypes
void des_multi_keystream_output (unsigned long long int mi, unsigned long long int key_ulli, uint8_t * output, int type, int len);
void tdea_multi_keystream_output (unsigned long long int mi, uint8_t * key, uint8_t * output, int type, int len);
//AES function prototypes
void aes_ofb_keystream_output (uint8_t * iv, uint8_t * key, uint8_t * output, int type, int nblocks);
void aes_ecb_bytewise_payload_crypt (uint8_t * input, uint8_t * key, uint8_t * output, int type, int de);
void aes_cbc_bytewise_payload_crypt (uint8_t * iv, uint8_t * key, uint8_t * in, uint8_t * out, int type, int nblocks, int de);
void aes_cfb_bytewise_payload_crypt (uint8_t * iv, uint8_t * key, uint8_t * in, uint8_t * out, int type, int nblocks, int de);
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);
//LFSR to expand either a DMR 32-bit or P25 64-bit MI into a 128-bit IV for AES
void LFSR128(dsd_state * state);
void LFSR128d(dsd_state * state);
#ifdef __cplusplus
extern "C" {