--tlsrec

desync.c

@@ -137,7 +137,7 @@ int disorder_attack(int sfd, char *buffer,
 }
 
 
-int desync(int sfd, char *buffer, 
+int desync(int sfd, char *buffer, size_t bfsize,
         ssize_t n, struct sockaddr *dst)
 {
     int pos = params.split;
@@ -154,12 +154,24 @@ int desync(int sfd, char *buffer,
     if (len && host) {
         LOG(LOG_S, "host: %.*s\n", len, host);
     }
+    
     if (type == IS_HTTP && params.mod_http) {
         if (mod_http(buffer, n, params.mod_http)) {
             fprintf(stderr, "mod http error\n");
             return -1;
         }
     }
+    else if (type == IS_HTTPS && params.tlsrec) {
+        int o = params.tlsrec_pos;
+        if (params.tlsrec_sni) {
+            o += (host - buffer - 9 - 5);
+        }
+        else if (o < 0) {
+            o += n;
+        }
+        n = part_tls(buffer, bfsize, n, o);
+    }
+    
     if (host && params.split_host) {
         pos += (host - buffer);
     }

desync.h

@@ -1 +1 @@
-int desync(int sfd, char *buffer, ssize_t n, struct sockaddr *dst);
+int desync(int sfd, char *buffer, size_t bfsize, ssize_t n, struct sockaddr *dst);

main.c

@@ -38,6 +38,9 @@ struct params params = {
     .def_ttl = 0,
     .custom_ttl = 0,
     .mod_http = 0,
+    .tlsrec = 0,
+    .tlsrec_pos = 0,
+    .tlsrec_sni = 0,
     .de_known = 0,
     
     .ipv6 = 1,
@@ -78,6 +81,8 @@ const char help_text[] = {
     "    -n, --tls-sni <str>       Change SNI in fake CH\n"
     #endif
     "    -M, --mod-http <h,d,r>    Modify http: hcsmix,dcsmix,rmspace\n"
+    "    -r, --tlsrec <offset>     Make 2 TLS records\n"
+    "    -L, --tlsrec-at-sni       Add SNI offset to tlsrec position\n"
 };
 
 
@@ -106,6 +111,8 @@ const struct option options[] = {
     {"tls-sni",       1, 0, 'n'},
     #endif
     {"mod-http",      1, 0, 'M'},
+    {"tlsrec",        1, 0, 'r'},
+    {"tlsrec-at-sni", 0, 0, 'L'},
     {"def-ttl",       1, 0, 'g'},
     {"delay",         1, 0, 'w'}, //
     
@@ -399,6 +406,20 @@ int main(int argc, char **argv)
             }
             break;
             
+        case 'r':
+            val = strtol(optarg, &end, 0);
+            if (val > 0xffff || *end)
+                invalid = 1;
+            else {
+                params.tlsrec_pos = val;
+                params.tlsrec = 1;
+            }
+            break;
+            
+        case 'L':
+            params.tlsrec_sni = 1;
+            break;
+            
         case 'g':
             val = strtol(optarg, &end, 0);
             if (val <= 0 || val > 255 || *end)

packets.c

@@ -212,3 +212,19 @@ int mod_http(char *buffer, size_t bsize, int m)
     }
     return 0;
 }
+
+
+ssize_t part_tls(char *buffer, size_t bsize, ssize_t n, int pos)
+{
+    if ((n < 3) || (bsize - n < 5) || 
+            (pos < 0) || (pos + 5 > n)) {
+        return n;
+    }
+    uint16_t r_sz = ANTOHS(buffer, 3);
+    memmove(buffer + 5 + pos + 5, buffer + 5 + pos, n - (5 + pos));
+    memcpy(buffer + 5 + pos, buffer, 3);
+    
+    *(uint16_t *)(buffer + 3) = htons(pos);
+    *(uint16_t *)(buffer + 5 + pos + 3) = htons(r_sz - pos);
+    return n + 5;
+}

packets.h

@@ -19,3 +19,5 @@ int parse_tls(char *buffer, size_t bsize, char **hs);
 int parse_http(char *buffer, size_t bsize, char **hs, uint16_t *port);
 
 int mod_http(char *buffer, size_t bsize, int m);
+
+ssize_t part_tls(char *buffer, size_t bsize, ssize_t n, int pos);

params.h

@@ -18,6 +18,9 @@ struct params {
     int def_ttl;
     char custom_ttl;
     int mod_http;
+    char tlsrec;
+    int tlsrec_pos;
+    char tlsrec_sni;
     
     char ipv6;
     char resolve;

proxy.c

@@ -443,7 +443,7 @@ static inline int on_connect(struct poolhd *pool, struct eval *val,
             if (n) perror("recv data");
             return -1;
         }
-        if (desync(val->pair->fd, buffer, 
+        if (desync(val->pair->fd, buffer, bfsize,
                 n, (struct sockaddr *)&val->pair->in6)) {
             return -1;
         }
@@ -596,8 +596,7 @@ int listener(struct sockaddr_ina srv)
     if (signal(SIGPIPE, SIG_IGN))
         perror("signal SIGPIPE!");
     #endif
-    if (signal(SIGINT, on_cancel))
-        perror("signal SIGINT!");
+    signal(SIGINT, on_cancel);
     
     int srvfd = nb_socket(srv.sa.sa_family, SOCK_STREAM);
     if (srvfd < 0) {

readme.txt

@@ -54,3 +54,7 @@ $ ./ciadpi --method disorder --split-pos 3 --port 1080
         "Host: name" -> "Host: NaMe"
     rmspace:
         "Host: name" -> "Host:name\t"
+-r, --tlsrec <offset>
+    Разделить ClientHello на отдельные записи по указанному смещению
+-L, --tlsrec-at-sni
+    Если найден SNI, то считать относительно его смещения