Commit
This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository.
Merge pull request #1631 from DSheirer/1630-flc-arc4-encryption-param…
…eters #1630 DMR FLC ARC4/EP Encryption Parameters
- Loading branch information
Showing
4 changed files
with
159 additions
and
27 deletions.
There are no files selected for viewing
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
117 changes: 117 additions & 0 deletions
117
...sheirer/module/decode/dmr/message/data/lc/full/hytera/HyteraArc4EncryptionParameters.java
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,117 @@ | ||
| /* | ||
| * ***************************************************************************** | ||
| * Copyright (C) 2014-2023 Dennis Sheirer | ||
| * | ||
| * This program is free software: you can redistribute it and/or modify | ||
| * it under the terms of the GNU General Public License as published by | ||
| * the Free Software Foundation, either version 3 of the License, or | ||
| * (at your option) any later version. | ||
| * | ||
| * This program is distributed in the hope that it will be useful, | ||
| * but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | ||
| * GNU General Public License for more details. | ||
| * | ||
| * You should have received a copy of the GNU General Public License | ||
| * along with this program. If not, see <http://www.gnu.org/licenses/> | ||
| * **************************************************************************** | ||
| */ | ||
|
|
||
| package io.github.dsheirer.module.decode.dmr.message.data.lc.full.hytera; | ||
|
|
||
| import io.github.dsheirer.bits.CorrectedBinaryMessage; | ||
| import io.github.dsheirer.identifier.Identifier; | ||
| import io.github.dsheirer.module.decode.dmr.identifier.DMRTalkgroup; | ||
| import io.github.dsheirer.module.decode.dmr.message.data.lc.full.FullLCMessage; | ||
| import java.util.ArrayList; | ||
| import java.util.List; | ||
|
|
||
| /** | ||
| * Hytera ARC4/EP Encryption Parameters | ||
| * <p> | ||
| * Note: observed as FLC payload for a PI_HEADER slot type. | ||
| * Note: observed on a Hytera system that was configured as IP Site Connect compatible. | ||
| */ | ||
| public class HyteraArc4EncryptionParameters extends FullLCMessage | ||
| { | ||
| private static final int[] KEY_ID = new int[]{16, 17, 18, 19, 20, 21, 22, 23}; | ||
| private static final int[] INITIALIZATION_VECTOR = new int[]{24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, | ||
| 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55}; | ||
| private static final int[] DESTINATION_GROUP = new int[]{56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, | ||
| 71, 72, 73, 74, 75, 76, 77, 78, 79}; | ||
| //Hytera version uses CRC-CCITT with 0x9696 initial fill, bits: 80-95 | ||
|
|
||
| private DMRTalkgroup mTalkgroup; | ||
| private List<Identifier> mIdentifiers; | ||
|
|
||
| /** | ||
| * Constructor | ||
| * @param message bits | ||
| * @param timestamp for the message | ||
| * @param timeslot of the message | ||
| */ | ||
| public HyteraArc4EncryptionParameters(CorrectedBinaryMessage message, long timestamp, int timeslot) | ||
| { | ||
| super(message, timestamp, timeslot); | ||
| } | ||
|
|
||
| @Override | ||
| public String toString() | ||
| { | ||
| StringBuilder sb = new StringBuilder(); | ||
|
|
||
| if(!isValid()) | ||
| { | ||
| sb.append("[CRC-ERROR] "); | ||
| } | ||
|
|
||
| if(isEncrypted()) | ||
| { | ||
| sb.append(" *ENCRYPTED*"); | ||
| } | ||
|
|
||
| if(isReservedBitSet()) | ||
| { | ||
| sb.append(" *RESERVED-BIT*"); | ||
| } | ||
|
|
||
| sb.append("FLC HYTERA ARC4/EP ENCRYPTION PARAMETERS"); | ||
| sb.append(" KEY:").append(getKeyId()); | ||
| sb.append(" IV:").append(getInitializationVector()); | ||
| sb.append(" TALKGROUP:").append(getTalkgroup()); | ||
| sb.append(" MSG:").append(getMessage().toHexString()); | ||
| return sb.toString(); | ||
| } | ||
|
|
||
| public DMRTalkgroup getTalkgroup() | ||
| { | ||
| if(mTalkgroup == null) | ||
| { | ||
| mTalkgroup = new DMRTalkgroup(getMessage().getInt(DESTINATION_GROUP)); | ||
| } | ||
|
|
||
| return mTalkgroup; | ||
| } | ||
|
|
||
| public int getKeyId() | ||
| { | ||
| return getMessage().getInt(KEY_ID); | ||
| } | ||
|
|
||
| public String getInitializationVector() | ||
| { | ||
| return getMessage().getHex(INITIALIZATION_VECTOR, 8); | ||
| } | ||
|
|
||
| @Override | ||
| public List<Identifier> getIdentifiers() | ||
| { | ||
| if(mIdentifiers == null) | ||
| { | ||
| mIdentifiers = new ArrayList<>(); | ||
| mIdentifiers.add(getTalkgroup()); | ||
| } | ||
|
|
||
| return mIdentifiers; | ||
| } | ||
| } |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters