2023-02-04 13:56:18 +00:00
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# Encryption (v1.1)
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Fixed Key: `020406080a0c0e10121416181a1c1e20222426282a2c2e30323436383a3c3e40`
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Packet Structure:
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2023-05-07 20:58:19 +00:00
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```rust
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struct Packet {
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#[len=pad_16(nonce_len)]
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nonce: Vec<u8>,
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#[len=pad_16(data_len)]
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data: Vec<u8>,
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nonce_len: u64,
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data_len: u64
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tag: [u8;16]
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}
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```
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2023-02-04 13:56:18 +00:00
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```
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00 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F
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0000 ED C9 C2 F4 7C 6D F2 54 42 EF 46 F6 00 00 00 00 ....|m.TB.F.....
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2023-05-07 20:58:19 +00:00
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2023-02-04 13:56:18 +00:00
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0010 68 13 5C 9A 2B 18 DB 9C 76 BE A0 8A 3E 49 79 3C h.\.+...v...>Iy<
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0020 8D 7A C4 4C 8B B0 A4 94 E5 B5 89 54 A6 ED 6D 75 .z.L.......T..mu
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0030 1A CA A8 4B 22 B5 03 84 F7 3C DE 4E B0 30 81 29 ...K"....<.N.0.)
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0040 3B 70 45 15 33 C0 97 67 85 6B 28 EF 2E 2E D1 83 ;pE.3..g.k(.....
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0050 E6 56 A7 81 53 89 3E 52 D8 82 CF 77 92 CF C2 D6 .V..S.>R...w....
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0060 9F 37 C5 DE EE 14 4D 3F 1F 82 32 7E 00 00 00 00 .7....M?..2~....
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2023-05-07 20:58:19 +00:00
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2023-02-04 13:56:18 +00:00
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0070 0C 00 00 00 00 00 00 00 5C 00 00 00 00 00 00 00 ........\.......
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2023-05-07 20:58:19 +00:00
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2023-02-04 13:56:18 +00:00
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0080 89 7A A8 32 93 56 B6 68 24 E0 58 63 7F 70 5A D2 .z.2.V.h$.Xc.pZ.
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```
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2023-05-07 20:58:19 +00:00
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Decryption algorithm (Pseudocode):
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```python
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cipher = ChaCha20(key,pkt.nonce)
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packet_key = cipher.decrypt(key)
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cipher.seek(packet_key.len()+32)
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data = cipher.decrypt(pkt.data)
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```
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2023-02-04 13:56:18 +00:00
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Decrypted:
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```
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00 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F
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0000 BA CE 01 01 8B 6D 06 00 00 00 01 4D 53 45 31 3A .....m.....MSE1:
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0010 20 46 6C 61 67 20 48 75 6E 74 20 32 2D 36 00 05 Flag Hunt 2-6..
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0020 00 00 00 00 00 05 18 01 88 AA 9B 46 6C 61 67 48 ...........FlagH
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0030 75 6E 74 00 54 A9 2F 05 F0 B4 4F 43 41 00 00 00 unt.T./...OCA...
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0040 4D 07 18 01 60 A3 00 05 00 00 80 3F 20 4A DA 3D M...`......? J.=
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0050 68 F8 8F 01 19 6A 71 77 20 8B FB 76 h....jqw ..v
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```
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# Netplay
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Game Info Packet
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```
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Server 'B':FZ (0/10) Ver 1.0 at 192.168.99.1:28086
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[0-2] ID (0xbace)
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[2-4] Version
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[4-5] port (16-bit)
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[6-7] max_players (16-bit)
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[8-9] curr_player (16-bit)
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[10-x] server name (char*)
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0 1 2 3 4 5 6 7 8 9 A B C D E F 0123456789ABCDEF
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0019fdc0 ba ce 00 01 b6 6d 0a 00 00 00 42 00 30 fe 19 00 .....m....B.0...
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0019fdd0 ff ff ff ff 27 2b b3 9b c7 3e bb 00 9c af 29 00 ....'+...>....).
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0019fde0 db 69 00 00 00 00 00 00 00 00 44 65 61 74 68 4d .i........DeathM
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0019fdf0 61 74 63 68 00 00 00 00 ff ff 46 5a 00 4a 91 f0 atch......FZ.J..
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0019fe00 92 8b 57 4e 7f 00 00 00 10 21 fe 38 0d ae 00 00 ..WN.....!.8....
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0019fe10 f0 ce f3 36 a0 e8 0b 77 a0 e8 ...6...w..
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```
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Player Join Packet
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```
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[0-3] header/ID?
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[6-x] Player name
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0 1 2 3 4 5 6 7 8 9 A B C D E F 0123456789ABCDEF
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09c9dfe8 7f 47 00 00 00 0e 55 6e 6e 61 6d 65 64 20 50 6c .G....Unnamed Pl
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09c9dff8 61 79 65 72 06 53 42 6f 73 73 31 b9 00 07 50 5f ayer.SBoss1...P_
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09c9e008 42 65 74 74 79 06 4d 42 4f 53 53 31 06 4d 42 4f Betty.MBOSS1.MBO
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09c9e018 53 53 31 00 00 10 30 2c 31 35 2c 30 2c 30 2c 31 SS1...0,15,0,0,1
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09c9e028 35 2c 31 35 2c 31 02 00 00 00 5,15,1....
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```
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Message | Description
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---------------------------------------- | -----------------------------------------------------------------
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`5c68625c32383230395c73637261706c616e64` | "Scrapland Server" announcement broadcast (`\hb\28209\scrapland`)
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`7f01000007` | Retrieve Game info
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`48423d35323932322c3235363a323830383600` | Connection Information (`HB=52922,256:28086`)
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