|
| 1 | +#!/usr/bin/env -S expect -f |
| 2 | +# |
| 3 | +# SSH Tunnel Test Script |
| 4 | +# |
| 5 | +# Tests an SSH tunnel using wolfSSH and netcat (nc). |
| 6 | +# |
| 7 | +# Architecture: |
| 8 | +# |
| 9 | +# [nc client] --plain--> :12345 [wolfssh client] |
| 10 | +# | |
| 11 | +# SSH |
| 12 | +# | |
| 13 | +# [wolfssh server] :ephem --plain--> :11111 [nc server] |
| 14 | +# |
| 15 | +# The nc client sends each line of a Lorem Ipsum paragraph through the tunnel |
| 16 | +# to the nc server one at a time. The server echoes each line back. Both sides |
| 17 | +# verify receipt of every line. |
| 18 | +# |
| 19 | +# Ports used: |
| 20 | +# 11111 - nc server (plain text backend) |
| 21 | +# 12345 - wolfssh client listener (plain text, nc connects here) |
| 22 | +# 22222 - wolfSSH rendezvous (SSH, internal use only) |
| 23 | +# |
| 24 | +# Requirements: nc (netcat), expect |
| 25 | + |
| 26 | +set timeout 30 |
| 27 | + |
| 28 | +set lorem_lines { |
| 29 | + {Lorem ipsum dolor sit amet, consectetur adipiscing elit,} |
| 30 | + {sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.} |
| 31 | + {Ut enim ad minim veniam, quis nostrud exercitation ullamco} |
| 32 | + {laboris nisi ut aliquip ex ea commodo consequat.} |
| 33 | + {Duis aute irure dolor in reprehenderit in voluptate velit esse} |
| 34 | + {cillum dolore eu fugiat nulla pariatur.} |
| 35 | + {Excepteur sint occaecat cupidatat non proident, sunt in culpa qui} |
| 36 | + {officia deserunt mollit anim id est laborum.} |
| 37 | +} |
| 38 | + |
| 39 | +# PIDs for cleanup |
| 40 | +set nc_server_pid "" |
| 41 | +set wolfssh_srv_pid "" |
| 42 | +set wolfssh_clt_pid "" |
| 43 | +set nc_client_pid "" |
| 44 | + |
| 45 | +# --- Cleanup ----------------------------------------------------------------- |
| 46 | +proc cleanup {} { |
| 47 | + global nc_client_pid wolfssh_clt_pid wolfssh_srv_pid nc_server_pid |
| 48 | + |
| 49 | + puts "\n--- Cleaning up ---" |
| 50 | + foreach pid [list $nc_client_pid $wolfssh_clt_pid $wolfssh_srv_pid $nc_server_pid] { |
| 51 | + if {$pid ne ""} { |
| 52 | + catch {exec kill $pid} |
| 53 | + } |
| 54 | + } |
| 55 | + puts "Done." |
| 56 | +} |
| 57 | + |
| 58 | +# --- Fail helper ------------------------------------------------------------- |
| 59 | +proc fail {msg} { |
| 60 | + puts "\n\[FAIL\] $msg" |
| 61 | + cleanup |
| 62 | + exit 1 |
| 63 | +} |
| 64 | + |
| 65 | +# --- Check prerequisites ----------------------------------------------------- |
| 66 | +foreach tool {nc} { |
| 67 | + if {[auto_execok $tool] eq ""} { |
| 68 | + puts "ERROR: '$tool' not found in PATH" |
| 69 | + exit 1 |
| 70 | + } |
| 71 | +} |
| 72 | + |
| 73 | +# --- [1] Start nc server ----------------------------------------------------- |
| 74 | +puts "\n\[1\] Starting nc server: nc -l 11111" |
| 75 | +spawn nc -l 11111 |
| 76 | +set nc_server_id $spawn_id |
| 77 | +set nc_server_pid [exp_pid] |
| 78 | +puts " PID $nc_server_pid — waiting for a connection..." |
| 79 | + |
| 80 | +# --- [2] Start wolfssh server ------------------------------------------------ |
| 81 | +puts "\n\[2\] Starting wolfssh server..." |
| 82 | +spawn ./examples/echoserver/echoserver -1 -f |
| 83 | +set wolfssh_srv_id $spawn_id |
| 84 | +set wolfssh_srv_pid [exp_pid] |
| 85 | +puts " PID $wolfssh_srv_pid — waiting for a connection..." |
| 86 | + |
| 87 | +# --- [3] Start wolfssh client ------------------------------------------------ |
| 88 | +puts "\n\[3\] Starting wolfssh client (plain:12345 -> 11111)..." |
| 89 | +spawn ./examples/portfwd/portfwd -u jill -P upthehill -f 12345 -t 11111 |
| 90 | +set wolfssh_clt_id $spawn_id |
| 91 | +set wolfssh_clt_pid [exp_pid] |
| 92 | + |
| 93 | +expect { |
| 94 | + -i $wolfssh_clt_id |
| 95 | + -re {sampled} { |
| 96 | + puts " wolfssh client ready (PID $wolfssh_clt_pid)." |
| 97 | + } |
| 98 | + -re {(?i)(error|fatal)} { |
| 99 | + fail "wolfssh client failed to start" |
| 100 | + } |
| 101 | + timeout { |
| 102 | + fail "Timed out waiting for wolfssh client to start" |
| 103 | + } |
| 104 | +} |
| 105 | + |
| 106 | +# Brief pause to let the wolfssh tunnels fully bind their listening ports |
| 107 | +sleep 1 |
| 108 | + |
| 109 | +# --- [4] Start nc client ----------------------------------------------------- |
| 110 | +puts "\n\[4\] Starting nc client: nc localhost 12345" |
| 111 | +spawn nc localhost 12345 |
| 112 | +set nc_client_id $spawn_id |
| 113 | +set nc_client_pid [exp_pid] |
| 114 | +puts " PID $nc_client_pid" |
| 115 | + |
| 116 | +# Allow the TCP handshake and SSH negotiation to complete |
| 117 | +sleep 1 |
| 118 | + |
| 119 | +# --- [5] Send each line, verify receipt, echo back, verify echo -------------- |
| 120 | +set n [llength $lorem_lines] |
| 121 | +set i 0 |
| 122 | +foreach line $lorem_lines { |
| 123 | + incr i |
| 124 | + puts "\n\[5.$i/$n\] Client sending: \"$line\"" |
| 125 | + send -i $nc_client_id "$line\n" |
| 126 | + |
| 127 | + expect { |
| 128 | + -i $nc_server_id |
| 129 | + -ex $line { |
| 130 | + puts " \[PASS\] Server received line $i." |
| 131 | + } |
| 132 | + timeout { |
| 133 | + fail "Server did not receive line $i within ${timeout}s" |
| 134 | + } |
| 135 | + } |
| 136 | + |
| 137 | + send -i $nc_server_id "$line\n" |
| 138 | + |
| 139 | + expect { |
| 140 | + -i $nc_client_id |
| 141 | + -ex $line { |
| 142 | + puts " \[PASS\] Client received echo of line $i." |
| 143 | + } |
| 144 | + timeout { |
| 145 | + fail "Client did not receive echo of line $i within ${timeout}s" |
| 146 | + } |
| 147 | + } |
| 148 | +} |
| 149 | + |
| 150 | +# --- Done -------------------------------------------------------------------- |
| 151 | +puts "\n=== TEST PASSED ===\n" |
| 152 | + |
| 153 | +cleanup |
| 154 | +exit 0 |
0 commit comments