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DMR: Add 15-bit scrambler method for Kenwood Radios; #303

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lwvmobile
2025-08-17 18:57:32 -04:00
parent a5b9984d78
commit 8df8ce85f2
5 changed files with 82 additions and 16 deletions
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13
src/dsd_mbe.c
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@@ -832,6 +832,13 @@ processMbeFrame (dsd_opts * opts, dsd_state * state, char imbe_fr[8][23], char a
ambe_d[i] ^= (uint8_t)(ctx.bits[i] & 1);
}
//DMR Kenwood Scrambler, Either Slot (static single key'd enforced KS) //should probably break this up, but this is a test for now
if (state->ken_sc == 1)
{
for (int i = 0; i < 49; i++)
ambe_d[i] ^= (uint8_t)(state->static_ks_bits[state->currentslot][(state->static_ks_counter[state->currentslot]++)%882] & 1); //Yikes!
}
//P25p2 RC4 Handling, VCH 0
if (state->currentslot == 0 && state->payload_algid == 0xAA && state->R != 0 && ((state->synctype == 35) || (state->synctype == 36)))
{
@@ -1267,6 +1274,9 @@ processMbeFrame (dsd_opts * opts, dsd_state * state, char imbe_fr[8][23], char a
}
}
if (state->ken_sc == 1)
state->dmr_encL = 0;
//reverse mute testing, only mute unencrypted traffic (slave piggyback dsd+ method)
if (opts->reverse_mute == 1)
{
@@ -1344,6 +1354,9 @@ processMbeFrame (dsd_opts * opts, dsd_state * state, char imbe_fr[8][23], char a
}
}
if (state->ken_sc == 1)
state->dmr_encR = 0;
//reverse mute testing, only mute unencrypted traffic (slave piggyback dsd+ method)
if (opts->reverse_mute == 1)
{