mirror of
https://github.com/bol-van/zapret.git
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nfqws: multiple fakes
This commit is contained in:
bol-van
parent
3d4b395bfe
commit
6387315c0b
204
nfq/desync.c
204
nfq/desync.c
@ -606,45 +606,48 @@ static uint16_t IP4_IP_ID_FIX(const struct ip *ip)
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// fake_mod buffer must at least sizeof(desync_profile->fake_tls)
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// size does not change
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// return : true - altered, false - not altered
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static bool runtime_tls_mod(const struct desync_profile *dp, uint8_t *fake_mod, const uint8_t *payload, size_t payload_len)
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static bool runtime_tls_mod(int fake_n,const struct fake_tls_mod_cache *modcache, uint8_t fake_tls_mod, const uint8_t *fake_data, size_t fake_data_size, const uint8_t *payload, size_t payload_len, uint8_t *fake_mod)
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{
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bool b=false;
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if (dp->fake_tls_mod & FAKE_TLS_MOD_PADENCAP)
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if (IsTLSClientHello(fake_data,fake_data_size,false))
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{
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size_t sz_rec = pntoh16(dp->fake_tls+3) + payload_len;
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size_t sz_handshake = pntoh24(dp->fake_tls+6) + payload_len;
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size_t sz_ext = pntoh16(dp->fake_tls+dp->fake_tls_extlen_offset) + payload_len;
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size_t sz_pad = pntoh16(dp->fake_tls+dp->fake_tls_padlen_offset) + payload_len;
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if ((sz_rec & ~0xFFFF) || (sz_handshake & ~0xFFFFFF) || (sz_ext & ~0xFFFF) || (sz_pad & ~0xFFFF))
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DLOG("cannot apply padencap tls mod. length overflow.\n");
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else
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if (fake_tls_mod & FAKE_TLS_MOD_PADENCAP)
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{
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memcpy(fake_mod,dp->fake_tls,dp->fake_tls_size);
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phton16(fake_mod+3,(uint16_t)sz_rec);
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phton24(fake_mod+6,(uint32_t)sz_handshake);
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phton16(fake_mod+dp->fake_tls_extlen_offset,(uint16_t)sz_ext);
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phton16(fake_mod+dp->fake_tls_padlen_offset,(uint16_t)sz_pad);
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size_t sz_rec = pntoh16(fake_data+3) + payload_len;
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size_t sz_handshake = pntoh24(fake_data+6) + payload_len;
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size_t sz_ext = pntoh16(fake_data+modcache->extlen_offset) + payload_len;
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size_t sz_pad = pntoh16(fake_data+modcache->padlen_offset) + payload_len;
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if ((sz_rec & ~0xFFFF) || (sz_handshake & ~0xFFFFFF) || (sz_ext & ~0xFFFF) || (sz_pad & ~0xFFFF))
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DLOG("fake[%d] cannot apply padencap tls mod. length overflow.\n", fake_n);
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else
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{
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memcpy(fake_mod,fake_data,fake_data_size);
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phton16(fake_mod+3,(uint16_t)sz_rec);
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phton24(fake_mod+6,(uint32_t)sz_handshake);
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phton16(fake_mod+modcache->extlen_offset,(uint16_t)sz_ext);
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phton16(fake_mod+modcache->padlen_offset,(uint16_t)sz_pad);
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b=true;
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}
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}
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if (fake_tls_mod & FAKE_TLS_MOD_RND)
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{
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if (!b) memcpy(fake_mod,fake_data,fake_data_size);
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fill_random_bytes(fake_mod+11,32); // random
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fill_random_bytes(fake_mod+44,fake_mod[43]); // session id
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b=true;
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}
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}
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if (dp->fake_tls_mod & FAKE_TLS_MOD_RND)
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{
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if (!b) memcpy(fake_mod,dp->fake_tls,dp->fake_tls_size);
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fill_random_bytes(fake_mod+11,32); // random
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fill_random_bytes(fake_mod+44,fake_mod[43]); // session id
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b=true;
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}
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if (dp->fake_tls_mod & FAKE_TLS_MOD_DUP_SID)
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{
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if (dp->fake_tls[43]!=payload[43])
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DLOG("cannot apply dupsid tls mod. fake and orig session id length mismatch.\n");
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else if (payload_len<(44+payload[43]))
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DLOG("cannot apply dupsid tls mod. data payload is not valid.\n");
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else
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if (fake_tls_mod & FAKE_TLS_MOD_DUP_SID)
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{
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if (!b) memcpy(fake_mod,dp->fake_tls,dp->fake_tls_size);
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memcpy(fake_mod+44,payload+44,fake_mod[43]); // session id
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b=true;
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if (fake_data[43]!=payload[43])
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DLOG("fake[%d] cannot apply dupsid tls mod. fake and orig session id length mismatch.\n",fake_n);
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else if (payload_len<(44+payload[43]))
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DLOG("fake[%d] cannot apply dupsid tls mod. data payload is not valid.\n",fake_n);
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else
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{
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if (!b) memcpy(fake_mod,fake_data,fake_data_size);
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memcpy(fake_mod+44,payload+44,fake_mod[43]); // session id
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b=true;
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}
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}
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}
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return b;
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@ -880,8 +883,8 @@ static uint8_t dpi_desync_tcp_packet_play(bool replay, size_t reasm_offset, uint
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if (!(dis->tcp->th_flags & TH_SYN) && dis->len_payload)
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{
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const uint8_t *fake;
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size_t fake_size;
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struct blob_collection_head *fake;
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char host[256];
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bool bHaveHost=false;
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uint8_t *p, *phost=NULL;
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@ -893,7 +896,6 @@ static uint8_t dpi_desync_tcp_packet_play(bool replay, size_t reasm_offset, uint
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int i;
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uint16_t ip_id;
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t_l7proto l7proto = UNKNOWN;
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uint8_t fake_mod[sizeof(dp->fake_tls)];
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if (replay)
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{
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@ -1183,16 +1185,13 @@ static uint8_t dpi_desync_tcp_packet_play(bool replay, size_t reasm_offset, uint
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switch(l7proto)
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{
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case HTTP:
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fake = dp->fake_http;
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fake_size = dp->fake_http_size;
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fake = &dp->fake_http;
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break;
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case TLS:
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fake = runtime_tls_mod(dp,fake_mod,rdata_payload,rlen_payload) ? fake_mod : dp->fake_tls;
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fake_size = dp->fake_tls_size;
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fake = &dp->fake_tls;
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break;
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default:
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fake = dp->fake_unknown;
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fake_size = dp->fake_unknown_size;
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fake = &dp->fake_unknown;
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break;
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}
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if (dp->desync_mode==DESYNC_MULTISPLIT || dp->desync_mode==DESYNC_MULTIDISORDER || dp->desync_mode2==DESYNC_MULTISPLIT || dp->desync_mode2==DESYNC_MULTIDISORDER)
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@ -1273,13 +1272,8 @@ static uint8_t dpi_desync_tcp_packet_play(bool replay, size_t reasm_offset, uint
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else
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seqovl_pos = 0;
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// we do not need reasm buffer anymore
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reasm_orig_cancel(ctrack);
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rdata_payload=NULL;
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uint32_t fooling_orig = FOOL_NONE;
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bool bFake = false;
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pkt1_len = sizeof(pkt1);
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switch(dp->desync_mode)
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{
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case DESYNC_FAKE_KNOWN:
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@ -1291,28 +1285,69 @@ static uint8_t dpi_desync_tcp_packet_play(bool replay, size_t reasm_offset, uint
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}
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case DESYNC_FAKE:
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if (reasm_offset) break;
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if (!prepare_tcp_segment((struct sockaddr *)&src, (struct sockaddr *)&dst, flags_orig, dis->tcp->th_seq, dis->tcp->th_ack, dis->tcp->th_win, scale_factor, timestamps,
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ttl_fake,IP4_TOS(dis->ip),IP4_IP_ID_FIX(dis->ip),IP6_FLOW(dis->ip6),
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dp->desync_fooling_mode,dp->desync_badseq_increment,dp->desync_badseq_ack_increment,
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fake, fake_size, pkt1, &pkt1_len))
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{
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return verdict;
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struct blob_item *fake_item;
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uint8_t *fake_data;
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uint8_t fake_data_buf[FAKE_MAX_TCP];
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int n=0;
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ip_id = IP4_IP_ID_FIX(dis->ip);
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LIST_FOREACH(fake_item, fake, next)
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{
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n++;
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switch(l7proto)
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{
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case TLS:
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if ((fake_item->size <= sizeof(fake_data_buf)) &&
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runtime_tls_mod(n,(struct fake_tls_mod_cache *)fake_item->extra, dp->fake_tls_mod, fake_item->data, fake_item->size, rdata_payload, rlen_payload, fake_data_buf))
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{
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fake_data = fake_data_buf;
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break;
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}
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default:
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fake_data = fake_item->data;
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}
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pkt1_len = sizeof(pkt1);
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if (!prepare_tcp_segment((struct sockaddr *)&src, (struct sockaddr *)&dst, flags_orig, dis->tcp->th_seq, dis->tcp->th_ack, dis->tcp->th_win, scale_factor, timestamps,
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ttl_fake,IP4_TOS(dis->ip),ip_id,IP6_FLOW(dis->ip6),
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dp->desync_fooling_mode,dp->desync_badseq_increment,dp->desync_badseq_ack_increment,
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fake_data, fake_item->size, pkt1, &pkt1_len))
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{
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reasm_orig_cancel(ctrack);
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return verdict;
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}
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DLOG("sending fake[%d] : ", n);
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hexdump_limited_dlog(fake_data,fake_item->size,PKTDATA_MAXDUMP); DLOG("\n");
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if (!rawsend_rep(dp->desync_repeats,(struct sockaddr *)&dst, desync_fwmark, ifout , pkt1, pkt1_len))
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{
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reasm_orig_cancel(ctrack);
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return verdict;
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}
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ip_id=IP4_IP_ID_NEXT(ip_id);
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}
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}
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DLOG("sending fake : ");
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hexdump_limited_dlog(fake,fake_size,PKTDATA_MAXDUMP); DLOG("\n");
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bFake = true;
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break;
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case DESYNC_RST:
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case DESYNC_RSTACK:
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if (reasm_offset) break;
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pkt1_len = sizeof(pkt1);
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if (!prepare_tcp_segment((struct sockaddr *)&src, (struct sockaddr *)&dst, TH_RST | (dp->desync_mode==DESYNC_RSTACK ? TH_ACK:0), dis->tcp->th_seq, dis->tcp->th_ack, dis->tcp->th_win, scale_factor, timestamps,
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ttl_fake,IP4_TOS(dis->ip),IP4_IP_ID_FIX(dis->ip),IP6_FLOW(dis->ip6),
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dp->desync_fooling_mode,dp->desync_badseq_increment,dp->desync_badseq_ack_increment,
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NULL, 0, pkt1, &pkt1_len))
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{
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reasm_orig_cancel(ctrack);
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return verdict;
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}
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DLOG("sending fake RST/RSTACK\n");
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if (!rawsend_rep(dp->desync_repeats,(struct sockaddr *)&dst, desync_fwmark, ifout , pkt1, pkt1_len))
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{
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reasm_orig_cancel(ctrack);
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return verdict;
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}
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bFake = true;
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break;
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case DESYNC_HOPBYHOP:
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@ -1323,8 +1358,11 @@ static uint8_t dpi_desync_tcp_packet_play(bool replay, size_t reasm_offset, uint
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(!split_pos && (dp->desync_mode2==DESYNC_FAKEDSPLIT || dp->desync_mode2==DESYNC_FAKEDDISORDER)) ||
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(!multisplit_count && (dp->desync_mode2==DESYNC_MULTISPLIT || dp->desync_mode2==DESYNC_MULTIDISORDER))))
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{
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reasm_orig_cancel(ctrack);
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pkt1_len = sizeof(pkt1);
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if (!prepare_tcp_segment((struct sockaddr *)&src, (struct sockaddr *)&dst, flags_orig, dis->tcp->th_seq, dis->tcp->th_ack, dis->tcp->th_win, scale_factor, timestamps,
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ttl_orig,IP4_TOS(dis->ip),IP4_IP_ID_FIX(dis->ip),IP6_FLOW(dis->ip6),
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ttl_orig,0,0,IP6_FLOW(dis->ip6),
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fooling_orig,0,0,
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dis->data_payload, dis->len_payload, pkt1, &pkt1_len))
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{
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@ -1341,11 +1379,9 @@ static uint8_t dpi_desync_tcp_packet_play(bool replay, size_t reasm_offset, uint
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break;
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}
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if (bFake)
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{
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if (!rawsend_rep(dp->desync_repeats,(struct sockaddr *)&dst, desync_fwmark, ifout , pkt1, pkt1_len))
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return verdict;
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}
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// we do not need reasm buffer anymore
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reasm_orig_cancel(ctrack);
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rdata_payload=NULL;
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enum dpi_desync_mode desync_mode = dp->desync_mode2==DESYNC_NONE ? dp->desync_mode : dp->desync_mode2;
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switch(desync_mode)
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@ -1875,8 +1911,7 @@ static uint8_t dpi_desync_udp_packet_play(bool replay, size_t reasm_offset, uint
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if (dis->len_payload)
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{
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const uint8_t *fake;
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size_t fake_size;
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struct blob_collection_head *fake;
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char host[256];
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bool bHaveHost=false;
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uint16_t ip_id;
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@ -2110,20 +2145,16 @@ static uint8_t dpi_desync_udp_packet_play(bool replay, size_t reasm_offset, uint
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switch(l7proto)
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{
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case QUIC:
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fake = dp->fake_quic;
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fake_size = dp->fake_quic_size;
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fake = &dp->fake_quic;
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break;
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case WIREGUARD:
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fake = dp->fake_wg;
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fake_size = dp->fake_wg_size;
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fake = &dp->fake_wg;
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break;
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case DHT:
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fake = dp->fake_dht;
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fake_size = dp->fake_dht_size;
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fake = &dp->fake_dht;
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break;
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default:
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fake = dp->fake_unknown_udp;
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fake_size = dp->fake_unknown_udp_size;
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fake = &dp->fake_unknown_udp;
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break;
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}
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@ -2140,7 +2171,6 @@ static uint8_t dpi_desync_udp_packet_play(bool replay, size_t reasm_offset, uint
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}
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bool bFake = false;
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pkt1_len = sizeof(pkt1);
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switch(dp->desync_mode)
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{
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case DESYNC_FAKE_KNOWN:
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@ -2150,12 +2180,30 @@ static uint8_t dpi_desync_udp_packet_play(bool replay, size_t reasm_offset, uint
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break;
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}
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case DESYNC_FAKE:
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if (!prepare_udp_segment((struct sockaddr *)&src, (struct sockaddr *)&dst, ttl_fake, IP4_TOS(dis->ip),IP4_IP_ID_FIX(dis->ip),IP6_FLOW(dis->ip6), dp->desync_fooling_mode, NULL, 0, 0, fake, fake_size, pkt1, &pkt1_len))
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return verdict;
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DLOG("sending fake : ");
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hexdump_limited_dlog(fake,fake_size,PKTDATA_MAXDUMP); DLOG("\n");
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if (!rawsend_rep(dp->desync_repeats,(struct sockaddr *)&dst, desync_fwmark, ifout , pkt1, pkt1_len))
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return verdict;
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{
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struct blob_item *fake_item;
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int n=0;
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ip_id = IP4_IP_ID_FIX(dis->ip);
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LIST_FOREACH(fake_item, fake, next)
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{
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n++;
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pkt1_len = sizeof(pkt1);
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if (!prepare_udp_segment((struct sockaddr *)&src, (struct sockaddr *)&dst,
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ttl_fake, IP4_TOS(dis->ip),ip_id,IP6_FLOW(dis->ip6),
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dp->desync_fooling_mode, NULL, 0, 0,
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fake_item->data, fake_item->size, pkt1, &pkt1_len))
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{
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return verdict;
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}
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DLOG("sending fake[%d] : ", n);
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hexdump_limited_dlog(fake_item->data,fake_item->size,PKTDATA_MAXDUMP); DLOG("\n");
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if (!rawsend_rep(dp->desync_repeats,(struct sockaddr *)&dst, desync_fwmark, ifout , pkt1, pkt1_len))
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return verdict;
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ip_id=IP4_IP_ID_NEXT(ip_id);
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}
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}
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bFake = true;
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break;
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case DESYNC_HOPBYHOP:
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@ -2164,9 +2212,9 @@ static uint8_t dpi_desync_udp_packet_play(bool replay, size_t reasm_offset, uint
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fooling_orig = (dp->desync_mode==DESYNC_HOPBYHOP) ? FOOL_HOPBYHOP : (dp->desync_mode==DESYNC_DESTOPT) ? FOOL_DESTOPT : FOOL_IPFRAG1;
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if (dis->ip6 && (dp->desync_mode2==DESYNC_NONE || !desync_valid_second_stage_udp(dp->desync_mode2)))
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{
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pkt1_len = sizeof(pkt1);
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if (!prepare_udp_segment((struct sockaddr *)&src, (struct sockaddr *)&dst,
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ttl_orig,IP4_TOS(dis->ip),IP4_IP_ID_FIX(dis->ip),IP6_FLOW(dis->ip6),
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fooling_orig,NULL,0,0,
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ttl_orig,0,0,IP6_FLOW(dis->ip6),fooling_orig,NULL,0,0,
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dis->data_payload, dis->len_payload, pkt1, &pkt1_len))
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{
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return verdict;
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167
nfq/nfqws.c
167
nfq/nfqws.c
@ -1007,74 +1007,67 @@ static void SplitDebug(void)
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}
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static const char * tld[]={"com","org","net","edu","gov","biz"};
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static void onetime_tls_mod(struct desync_profile *dp)
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static bool onetime_tls_mod_blob(int profile_n, int fake_n, uint8_t fake_tls_mod, uint8_t *fake_tls, size_t *fake_tls_size, size_t fake_tls_buf_size, struct fake_tls_mod_cache *modcache)
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{
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const uint8_t *ext;
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size_t extlen, slen;
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if (dp->n && !(dp->fake_tls_mod & (FAKE_TLS_MOD_SET|FAKE_TLS_MOD_CUSTOM_FAKE)))
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dp->fake_tls_mod |= FAKE_TLS_MOD_RND|FAKE_TLS_MOD_RND_SNI|FAKE_TLS_MOD_DUP_SID; // old behavior compat + dup_sid
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if (!(dp->fake_tls_mod & ~FAKE_TLS_MOD_SAVE_MASK))
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return; // nothing to do
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if (!IsTLSClientHello(dp->fake_tls,dp->fake_tls_size,false) || (dp->fake_tls_size<(44+dp->fake_tls[43]))) // has session id ?
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modcache->extlen_offset = modcache->padlen_offset = 0;
|
||||
if (fake_tls_mod & FAKE_TLS_MOD_PADENCAP)
|
||||
{
|
||||
DLOG_ERR("profile %d tls mod set but tls fake structure invalid\n", dp->n);
|
||||
exit_clean(1);
|
||||
}
|
||||
if (dp->fake_tls_mod & FAKE_TLS_MOD_PADENCAP)
|
||||
{
|
||||
if (!TLSFindExtLen(dp->fake_tls,dp->fake_tls_size,&dp->fake_tls_extlen_offset))
|
||||
if (!TLSFindExtLen(fake_tls,*fake_tls_size,&modcache->extlen_offset))
|
||||
{
|
||||
DLOG_ERR("profile %d padencap set but tls fake structure invalid\n", dp->n);
|
||||
exit_clean(1);
|
||||
DLOG_ERR("profile %d fake[%d] padencap set but tls fake structure invalid\n", profile_n, fake_n);
|
||||
return false;
|
||||
}
|
||||
DLOG("profile %d fake tls extensions length offset : %zu\n", dp->n, dp->fake_tls_extlen_offset);
|
||||
if (TLSFindExt(dp->fake_tls,dp->fake_tls_size,21,&ext,&extlen,false))
|
||||
DLOG("profile %d fake[%d] tls extensions length offset : %zu\n", profile_n, fake_n, modcache->extlen_offset);
|
||||
if (TLSFindExt(fake_tls,*fake_tls_size,21,&ext,&extlen,false))
|
||||
{
|
||||
if ((ext-dp->fake_tls+extlen)!=dp->fake_tls_size)
|
||||
if ((ext-fake_tls+extlen)!=*fake_tls_size)
|
||||
{
|
||||
DLOG_ERR("profile %d fake tls padding ext is present but it's not at the end. padding ext offset %zu, padding ext size %zu, fake size %zu\n", dp->n, ext-dp->fake_tls, extlen, dp->fake_tls_size);
|
||||
exit_clean(1);
|
||||
DLOG_ERR("profile %d fake[%d] tls padding ext is present but it's not at the end. padding ext offset %zu, padding ext size %zu, fake size %zu\n", profile_n, fake_n, ext-fake_tls, extlen, *fake_tls_size);
|
||||
return false;
|
||||
}
|
||||
dp->fake_tls_padlen_offset = ext-dp->fake_tls-2;
|
||||
DLOG("profile %d fake tls padding ext is present, padding length offset %zu\n", dp->n, dp->fake_tls_padlen_offset);
|
||||
modcache->padlen_offset = ext-fake_tls-2;
|
||||
DLOG("profile %d fake[%d] tls padding ext is present, padding length offset %zu\n", profile_n, fake_n, modcache->padlen_offset);
|
||||
}
|
||||
else
|
||||
{
|
||||
if ((dp->fake_tls_size+4)>sizeof(dp->fake_tls))
|
||||
if ((*fake_tls_size+4)>fake_tls_buf_size)
|
||||
{
|
||||
DLOG_ERR("profile %d fake tls padding is absent and there's not space to add it\n", dp->n);
|
||||
exit_clean(1);
|
||||
DLOG_ERR("profile %d fake[%d] tls padding is absent and there's no space to add it\n", profile_n, fake_n);
|
||||
return false;
|
||||
}
|
||||
phton16(dp->fake_tls+dp->fake_tls_size,21);
|
||||
dp->fake_tls_size+=2;
|
||||
dp->fake_tls_padlen_offset=dp->fake_tls_size;
|
||||
phton16(dp->fake_tls+dp->fake_tls_size,0);
|
||||
dp->fake_tls_size+=2;
|
||||
phton16(dp->fake_tls+dp->fake_tls_extlen_offset,pntoh16(dp->fake_tls+dp->fake_tls_extlen_offset)+4);
|
||||
phton16(dp->fake_tls+3,pntoh16(dp->fake_tls+3)+4); // increase tls record len
|
||||
phton24(dp->fake_tls+6,pntoh24(dp->fake_tls+6)+4); // increase tls handshake len
|
||||
DLOG("profile %d fake tls padding is absent. added. padding ledgth offset %zu\n", dp->n, dp->fake_tls_padlen_offset);
|
||||
phton16(fake_tls+*fake_tls_size,21);
|
||||
*fake_tls_size+=2;
|
||||
modcache->padlen_offset=*fake_tls_size;
|
||||
phton16(fake_tls+*fake_tls_size,0);
|
||||
*fake_tls_size+=2;
|
||||
phton16(fake_tls+modcache->extlen_offset,pntoh16(fake_tls+modcache->extlen_offset)+4);
|
||||
phton16(fake_tls+3,pntoh16(fake_tls+3)+4); // increase tls record len
|
||||
phton24(fake_tls+6,pntoh24(fake_tls+6)+4); // increase tls handshake len
|
||||
DLOG("profile %d fake[%d] tls padding is absent. added. padding length offset %zu\n", profile_n, fake_n, modcache->padlen_offset);
|
||||
}
|
||||
}
|
||||
if (dp->fake_tls_mod & FAKE_TLS_MOD_RND_SNI)
|
||||
if (fake_tls_mod & FAKE_TLS_MOD_RND_SNI)
|
||||
{
|
||||
if (!TLSFindExt(dp->fake_tls,dp->fake_tls_size,0,&ext,&extlen,false))
|
||||
if (!TLSFindExt(fake_tls,*fake_tls_size,0,&ext,&extlen,false))
|
||||
{
|
||||
DLOG_ERR("profile %d rndsni set but tls fake does not have SNI\n", dp->n);
|
||||
exit_clean(1);
|
||||
DLOG_ERR("profile %d fake[%d] rndsni set but tls fake does not have SNI\n", profile_n, fake_n);
|
||||
return false;
|
||||
}
|
||||
if (!TLSAdvanceToHostInSNI(&ext,&extlen,&slen))
|
||||
{
|
||||
DLOG_ERR("profile %d rndsni set but tls fake has invalid SNI structure\n", dp->n);
|
||||
exit_clean(1);
|
||||
DLOG_ERR("profile %d fake[%d] rndsni set but tls fake has invalid SNI structure\n", profile_n, fake_n);
|
||||
return false;
|
||||
}
|
||||
if (!slen)
|
||||
{
|
||||
DLOG_ERR("profile %d rndsni set but tls fake has zero sized SNI\n", dp->n);
|
||||
exit_clean(1);
|
||||
DLOG_ERR("profile %d fake[%d] rndsni set but tls fake has zero sized SNI\n", profile_n, fake_n);
|
||||
return false;
|
||||
}
|
||||
uint8_t *sni = dp->fake_tls + (ext - dp->fake_tls);
|
||||
uint8_t *sni = fake_tls + (ext - fake_tls);
|
||||
|
||||
char *s1=NULL, *s2=NULL;
|
||||
if (params.debug)
|
||||
@ -1100,11 +1093,66 @@ static void onetime_tls_mod(struct desync_profile *dp)
|
||||
if (s1 && (s2 = malloc(slen+1)))
|
||||
{
|
||||
memcpy(s2,sni,slen); s2[slen]=0;
|
||||
DLOG("profile %d generated random SNI : %s -> %s\n",dp->n,s1,s2);
|
||||
DLOG("profile %d fake[%d] generated random SNI : %s -> %s\n",profile_n,fake_n,s1,s2);
|
||||
}
|
||||
free(s1); free(s2);
|
||||
}
|
||||
}
|
||||
return true;
|
||||
}
|
||||
static bool onetime_tls_mod(struct desync_profile *dp)
|
||||
{
|
||||
if (dp->n && !(dp->fake_tls_mod & (FAKE_TLS_MOD_SET|FAKE_TLS_MOD_CUSTOM_FAKE)))
|
||||
dp->fake_tls_mod |= FAKE_TLS_MOD_RND|FAKE_TLS_MOD_RND_SNI|FAKE_TLS_MOD_DUP_SID; // old behavior compat + dup_sid
|
||||
if (!(dp->fake_tls_mod & ~FAKE_TLS_MOD_SAVE_MASK))
|
||||
return true; // nothing to do
|
||||
|
||||
struct blob_item *fake_tls;
|
||||
int n=0;
|
||||
bool bMod=false;
|
||||
|
||||
LIST_FOREACH(fake_tls, &dp->fake_tls, next)
|
||||
{
|
||||
++n;
|
||||
if (!IsTLSClientHello(fake_tls->data,fake_tls->size,false) || (fake_tls->size < (44+fake_tls->data[43]))) // has session id ?
|
||||
{
|
||||
DLOG_ERR("profile %d fake[%d] tls mod set but tls fake structure invalid. mod skipped.\n", dp->n, n);
|
||||
continue;
|
||||
|
||||
}
|
||||
bMod = true;
|
||||
if (!fake_tls->extra)
|
||||
{
|
||||
fake_tls->extra = malloc(sizeof(struct fake_tls_mod_cache));
|
||||
if (!fake_tls->extra) return false;
|
||||
}
|
||||
if (!onetime_tls_mod_blob(dp->n,n,dp->fake_tls_mod,fake_tls->data,&fake_tls->size,fake_tls->size_buf,(struct fake_tls_mod_cache*)fake_tls->extra))
|
||||
return false;
|
||||
}
|
||||
if (!bMod)
|
||||
DLOG_ERR("profile %d tls fake list does not have any valid TLS ClientHello\n", dp->n);
|
||||
return bMod;
|
||||
}
|
||||
|
||||
static void load_blob_to_collection(const char *filename, struct blob_collection_head *blobs, size_t max_size, size_t size_reserve)
|
||||
{
|
||||
struct blob_item *blob = blob_collection_add(blobs);
|
||||
uint8_t *p;
|
||||
if (!blob || (!(blob->data = malloc(max_size+size_reserve))))
|
||||
{
|
||||
DLOG_ERR("out of memory\n");
|
||||
exit_clean(1);
|
||||
}
|
||||
blob->size = max_size;
|
||||
load_file_or_exit(filename,blob->data,&blob->size);
|
||||
p = realloc(blob->data,blob->size+size_reserve);
|
||||
if (!p)
|
||||
{
|
||||
DLOG_ERR("out of memory\n");
|
||||
exit_clean(1);
|
||||
}
|
||||
blob->data = p;
|
||||
blob->size_buf = blob->size+size_reserve;
|
||||
}
|
||||
|
||||
|
||||
@ -1992,13 +2040,10 @@ int main(int argc, char **argv)
|
||||
dp->desync_any_proto = !optarg || atoi(optarg);
|
||||
break;
|
||||
case 38: /* dpi-desync-fake-http */
|
||||
dp->fake_http_size = sizeof(dp->fake_http);
|
||||
load_file_or_exit(optarg,dp->fake_http,&dp->fake_http_size);
|
||||
load_blob_to_collection(optarg, &dp->fake_http, FAKE_MAX_TCP,0);
|
||||
break;
|
||||
case 39: /* dpi-desync-fake-tls */
|
||||
dp->fake_tls_size = sizeof(dp->fake_tls);
|
||||
load_file_or_exit(optarg,dp->fake_tls,&dp->fake_tls_size);
|
||||
dp->fake_tls_mod |= FAKE_TLS_MOD_CUSTOM_FAKE;
|
||||
load_blob_to_collection(optarg, &dp->fake_tls, FAKE_MAX_TCP,4);
|
||||
break;
|
||||
case 40: /* dpi-desync-fake-tls-mod */
|
||||
if (!parse_tlsmod_list(optarg,&dp->fake_tls_mod))
|
||||
@ -2008,28 +2053,23 @@ int main(int argc, char **argv)
|
||||
}
|
||||
break;
|
||||
case 41: /* dpi-desync-fake-unknown */
|
||||
dp->fake_unknown_size = sizeof(dp->fake_unknown);
|
||||
load_file_or_exit(optarg,dp->fake_unknown,&dp->fake_unknown_size);
|
||||
load_blob_to_collection(optarg, &dp->fake_unknown, FAKE_MAX_TCP, 0);
|
||||
break;
|
||||
case 42: /* dpi-desync-fake-syndata */
|
||||
dp->fake_syndata_size = sizeof(dp->fake_syndata);
|
||||
load_file_or_exit(optarg,dp->fake_syndata,&dp->fake_syndata_size);
|
||||
break;
|
||||
case 43: /* dpi-desync-fake-quic */
|
||||
dp->fake_quic_size = sizeof(dp->fake_quic);
|
||||
load_file_or_exit(optarg,dp->fake_quic,&dp->fake_quic_size);
|
||||
load_blob_to_collection(optarg, &dp->fake_quic, FAKE_MAX_UDP, 0);
|
||||
break;
|
||||
case 44: /* dpi-desync-fake-wireguard */
|
||||
dp->fake_wg_size = sizeof(dp->fake_wg);
|
||||
load_file_or_exit(optarg,dp->fake_wg,&dp->fake_wg_size);
|
||||
load_blob_to_collection(optarg, &dp->fake_wg, FAKE_MAX_UDP, 0);
|
||||
break;
|
||||
case 45: /* dpi-desync-fake-dht */
|
||||
dp->fake_dht_size = sizeof(dp->fake_dht);
|
||||
load_file_or_exit(optarg,dp->fake_dht,&dp->fake_dht_size);
|
||||
load_blob_to_collection(optarg, &dp->fake_dht, FAKE_MAX_UDP, 0);
|
||||
break;
|
||||
case 46: /* dpi-desync-fake-unknown-udp */
|
||||
dp->fake_unknown_udp_size = sizeof(dp->fake_unknown_udp);
|
||||
load_file_or_exit(optarg,dp->fake_unknown_udp,&dp->fake_unknown_udp_size);
|
||||
load_blob_to_collection(optarg, &dp->fake_unknown_udp, FAKE_MAX_UDP, 0);
|
||||
break;
|
||||
case 47: /* dpi-desync-udplen-increment */
|
||||
if (sscanf(optarg,"%d",&dp->udplen_increment)<1 || dp->udplen_increment>0x7FFF || dp->udplen_increment<-0x8000)
|
||||
@ -2475,7 +2515,16 @@ int main(int argc, char **argv)
|
||||
if (AUTOTTL_ENABLED(dp->desync_autottl6))
|
||||
DLOG("profile %d autottl ipv6 %u:%u-%u\n",dp->n,dp->desync_autottl6.delta,dp->desync_autottl6.min,dp->desync_autottl6.max);
|
||||
split_compat(dp);
|
||||
onetime_tls_mod(dp);
|
||||
if (!dp_fake_defaults(dp))
|
||||
{
|
||||
DLOG_ERR("could not fill fake defaults\n");
|
||||
exit_clean(1);
|
||||
}
|
||||
if (!onetime_tls_mod(dp))
|
||||
{
|
||||
DLOG_ERR("could not mod tls\n");
|
||||
exit_clean(1);
|
||||
}
|
||||
#ifndef __CYGWIN__
|
||||
if (params.droproot && dp->hostlist_auto && chown(dp->hostlist_auto->filename, params.uid, -1))
|
||||
DLOG_ERR("could not chown %s. auto hostlist file may not be writable after privilege drop\n", dp->hostlist_auto->filename);
|
||||
|
||||
63
nfq/params.c
63
nfq/params.c
@ -184,18 +184,8 @@ void dp_init(struct desync_profile *dp)
|
||||
dp->desync_ipfrag_pos_udp = IPFRAG_UDP_DEFAULT;
|
||||
dp->desync_ipfrag_pos_tcp = IPFRAG_TCP_DEFAULT;
|
||||
dp->desync_repeats = 1;
|
||||
dp->fake_tls_size = sizeof(fake_tls_clienthello_default);
|
||||
memcpy(dp->fake_tls,fake_tls_clienthello_default,dp->fake_tls_size);
|
||||
dp->fake_tls_mod = 0;
|
||||
dp->fake_http_size = strlen(fake_http_request_default);
|
||||
memcpy(dp->fake_http,fake_http_request_default,dp->fake_http_size);
|
||||
dp->fake_quic_size = 620; // must be 601+ for TSPU hack
|
||||
dp->fake_quic[0] = 0x40; // russian TSPU QUIC short header fake
|
||||
dp->fake_wg_size = 64;
|
||||
dp->fake_dht_size = 64;
|
||||
dp->fake_unknown_size = 256;
|
||||
dp->fake_syndata_size = 16;
|
||||
dp->fake_unknown_udp_size = 64;
|
||||
dp->wscale=-1; // default - dont change scale factor (client)
|
||||
dp->desync_ttl6 = 0xFF; // unused
|
||||
dp->desync_badseq_increment = BADSEQ_INCREMENT_DEFAULT;
|
||||
@ -207,11 +197,55 @@ void dp_init(struct desync_profile *dp)
|
||||
dp->hostlist_auto_retrans_threshold = HOSTLIST_AUTO_RETRANS_THRESHOLD_DEFAULT;
|
||||
dp->filter_ipv4 = dp->filter_ipv6 = true;
|
||||
}
|
||||
bool dp_fake_defaults(struct desync_profile *dp)
|
||||
{
|
||||
struct blob_item *item;
|
||||
if (blob_collection_empty(&dp->fake_http))
|
||||
if (!blob_collection_add_blob(&dp->fake_http,fake_http_request_default,strlen(fake_http_request_default),0))
|
||||
return false;
|
||||
if (blob_collection_empty(&dp->fake_tls))
|
||||
{
|
||||
if (!blob_collection_add_blob(&dp->fake_tls,fake_tls_clienthello_default,sizeof(fake_tls_clienthello_default),4))
|
||||
return false;
|
||||
}
|
||||
if (blob_collection_empty(&dp->fake_unknown))
|
||||
{
|
||||
if (!(item=blob_collection_add_blob(&dp->fake_unknown,NULL,256,0)))
|
||||
return false;
|
||||
memset(item->data,0,item->size);
|
||||
}
|
||||
if (blob_collection_empty(&dp->fake_quic))
|
||||
{
|
||||
if (!(item=blob_collection_add_blob(&dp->fake_quic,NULL,620,0)))
|
||||
return false;
|
||||
memset(item->data,0,item->size);
|
||||
item->data[0] = 0x40;
|
||||
}
|
||||
if (blob_collection_empty(&dp->fake_wg))
|
||||
{
|
||||
if (!(item=blob_collection_add_blob(&dp->fake_wg,NULL,64,0)))
|
||||
return false;
|
||||
memset(item->data,0,item->size);
|
||||
}
|
||||
if (blob_collection_empty(&dp->fake_dht))
|
||||
{
|
||||
if (!(item=blob_collection_add_blob(&dp->fake_dht,NULL,64,0)))
|
||||
return false;
|
||||
memset(item->data,0,item->size);
|
||||
}
|
||||
if (blob_collection_empty(&dp->fake_unknown_udp))
|
||||
{
|
||||
if (!(item=blob_collection_add_blob(&dp->fake_unknown_udp,NULL,64,0)))
|
||||
return false;
|
||||
memset(item->data,0,item->size);
|
||||
}
|
||||
return true;
|
||||
}
|
||||
struct desync_profile_list *dp_list_add(struct desync_profile_list_head *head)
|
||||
{
|
||||
struct desync_profile_list *entry = calloc(1,sizeof(struct desync_profile_list));
|
||||
if (!entry) return NULL;
|
||||
|
||||
|
||||
dp_init(&entry->dp);
|
||||
|
||||
// add to the tail
|
||||
@ -234,6 +268,13 @@ static void dp_clear_dynamic(struct desync_profile *dp)
|
||||
ipset_collection_destroy(&dp->ips_collection_exclude);
|
||||
port_filters_destroy(&dp->pf_tcp);
|
||||
port_filters_destroy(&dp->pf_udp);
|
||||
blob_collection_destroy(&dp->fake_http);
|
||||
blob_collection_destroy(&dp->fake_tls);
|
||||
blob_collection_destroy(&dp->fake_unknown);
|
||||
blob_collection_destroy(&dp->fake_unknown_udp);
|
||||
blob_collection_destroy(&dp->fake_quic);
|
||||
blob_collection_destroy(&dp->fake_wg);
|
||||
blob_collection_destroy(&dp->fake_dht);
|
||||
HostFailPoolDestroy(&dp->hostlist_auto_fail_counters);
|
||||
}
|
||||
void dp_clear(struct desync_profile *dp)
|
||||
|
||||
19
nfq/params.h
19
nfq/params.h
@ -46,8 +46,16 @@
|
||||
#define FAKE_TLS_MOD_RND_SNI 0x40
|
||||
#define FAKE_TLS_MOD_PADENCAP 0x80
|
||||
|
||||
#define FAKE_MAX_TCP 1460
|
||||
#define FAKE_MAX_UDP 1472
|
||||
|
||||
enum log_target { LOG_TARGET_CONSOLE=0, LOG_TARGET_FILE, LOG_TARGET_SYSLOG };
|
||||
|
||||
struct fake_tls_mod_cache
|
||||
{
|
||||
size_t extlen_offset, padlen_offset;
|
||||
};
|
||||
|
||||
struct desync_profile
|
||||
{
|
||||
int n; // number of the profile
|
||||
@ -74,12 +82,12 @@ struct desync_profile
|
||||
autottl desync_autottl, desync_autottl6;
|
||||
uint32_t desync_fooling_mode;
|
||||
uint32_t desync_badseq_increment, desync_badseq_ack_increment;
|
||||
uint8_t fake_http[1460],fake_unknown[1460],fake_syndata[1460],seqovl_pattern[1460],fsplit_pattern[1460];
|
||||
uint8_t fake_unknown_udp[1472],udplen_pattern[1472],fake_quic[1472],fake_wg[1472],fake_dht[1472];
|
||||
size_t fake_http_size,fake_quic_size,fake_wg_size,fake_dht_size,fake_unknown_size,fake_syndata_size,fake_unknown_udp_size;
|
||||
|
||||
uint8_t fake_tls[1460],fake_tls_mod;
|
||||
size_t fake_tls_size, fake_tls_extlen_offset, fake_tls_padlen_offset;
|
||||
struct blob_collection_head fake_http,fake_tls,fake_unknown,fake_unknown_udp,fake_quic,fake_wg,fake_dht;
|
||||
uint8_t fake_syndata[FAKE_MAX_TCP],seqovl_pattern[FAKE_MAX_TCP],fsplit_pattern[FAKE_MAX_TCP],udplen_pattern[FAKE_MAX_UDP];
|
||||
size_t fake_syndata_size;
|
||||
|
||||
uint8_t fake_tls_mod;
|
||||
|
||||
int udplen_increment;
|
||||
|
||||
@ -113,6 +121,7 @@ void dp_entry_destroy(struct desync_profile_list *entry);
|
||||
void dp_list_destroy(struct desync_profile_list_head *head);
|
||||
bool dp_list_have_autohostlist(struct desync_profile_list_head *head);
|
||||
void dp_init(struct desync_profile *dp);
|
||||
bool dp_fake_defaults(struct desync_profile *dp);
|
||||
void dp_clear(struct desync_profile *dp);
|
||||
|
||||
struct params_s
|
||||
|
||||
61
nfq/pools.c
61
nfq/pools.c
@ -517,3 +517,64 @@ bool port_filters_deny_if_empty(struct port_filters_head *head)
|
||||
if (LIST_FIRST(head)) return true;
|
||||
return pf_parse("0",&pf) && port_filter_add(head,&pf);
|
||||
}
|
||||
|
||||
|
||||
|
||||
struct blob_item *blob_collection_add(struct blob_collection_head *head)
|
||||
{
|
||||
struct blob_item *entry = calloc(1,sizeof(struct blob_item));
|
||||
if (entry)
|
||||
{
|
||||
// insert to the end
|
||||
struct blob_item *itemc,*iteml=LIST_FIRST(head);
|
||||
if (iteml)
|
||||
{
|
||||
while ((itemc=LIST_NEXT(iteml,next))) iteml = itemc;
|
||||
LIST_INSERT_AFTER(iteml, entry, next);
|
||||
}
|
||||
else
|
||||
LIST_INSERT_HEAD(head, entry, next);
|
||||
}
|
||||
return entry;
|
||||
}
|
||||
struct blob_item *blob_collection_add_blob(struct blob_collection_head *head, const void *data, size_t size, size_t size_reserve)
|
||||
{
|
||||
struct blob_item *entry = calloc(1,sizeof(struct blob_item));
|
||||
if (!entry) return NULL;
|
||||
if (!(entry->data = malloc(size+size_reserve)))
|
||||
{
|
||||
free(entry);
|
||||
return NULL;
|
||||
}
|
||||
if (data) memcpy(entry->data,data,size);
|
||||
entry->size = size;
|
||||
entry->size_buf = size+size_reserve;
|
||||
|
||||
// insert to the end
|
||||
struct blob_item *itemc,*iteml=LIST_FIRST(head);
|
||||
if (iteml)
|
||||
{
|
||||
while ((itemc=LIST_NEXT(iteml,next))) iteml = itemc;
|
||||
LIST_INSERT_AFTER(iteml, entry, next);
|
||||
}
|
||||
else
|
||||
LIST_INSERT_HEAD(head, entry, next);
|
||||
|
||||
return entry;
|
||||
}
|
||||
|
||||
void blob_collection_destroy(struct blob_collection_head *head)
|
||||
{
|
||||
struct blob_item *entry;
|
||||
while ((entry = LIST_FIRST(head)))
|
||||
{
|
||||
LIST_REMOVE(entry, next);
|
||||
free(entry->extra);
|
||||
free(entry->data);
|
||||
free(entry);
|
||||
}
|
||||
}
|
||||
bool blob_collection_empty(const struct blob_collection_head *head)
|
||||
{
|
||||
return !LIST_FIRST(head);
|
||||
}
|
||||
|
||||
14
nfq/pools.h
14
nfq/pools.h
@ -146,3 +146,17 @@ bool port_filter_add(struct port_filters_head *head, const port_filter *pf);
|
||||
void port_filters_destroy(struct port_filters_head *head);
|
||||
bool port_filters_in_range(const struct port_filters_head *head, uint16_t port);
|
||||
bool port_filters_deny_if_empty(struct port_filters_head *head);
|
||||
|
||||
|
||||
struct blob_item {
|
||||
uint8_t *data; // main data blob
|
||||
size_t size; // main data blob size
|
||||
size_t size_buf;// main data blob allocated size
|
||||
void *extra; // any data without size
|
||||
LIST_ENTRY(blob_item) next;
|
||||
};
|
||||
LIST_HEAD(blob_collection_head, blob_item);
|
||||
struct blob_item *blob_collection_add(struct blob_collection_head *head);
|
||||
struct blob_item *blob_collection_add_blob(struct blob_collection_head *head, const void *data, size_t size, size_t size_reserve);
|
||||
void blob_collection_destroy(struct blob_collection_head *head);
|
||||
bool blob_collection_empty(const struct blob_collection_head *head);
|
||||
|
||||
Loading…
x
Reference in New Issue
Block a user