Merge branch 'main' of https://github.com/nuoxoxo/cfo into main

README.mdx

@@ -1,8 +1,12 @@
 ```b
 flag00  nottoohardhere 
 level01  x24ti5gi3x0ol2eh4esiuxias
+
 flag01  abcdefg
 level02  f2av5il02puano7naaf6adaaf
+
+flag02  ft_waNDReL0L
+level03  kooda2puivaav1idi4f57q8iq
 ```
 
 
@@ -98,11 +102,43 @@ Password: abcdefg
   - `realpath` - get the full absolute filepath
   - `scp` - secure copy - `scp username@ip:path _local_`
   - `~.pcap` - a Packet Capture to store network packet data captured during network traffic monitoring
+
 ```b
+### VM
 > ls -l
 ----r--r-- 1 flag02 level02 level02.pcap
 ^ which means a regular file
 
 > scp -P 4242 [email protected]:/home/user/level02/level02.pcap $(pwd)
+
+### Host
+> hexdump -C level02.pcap 
+> xxd level02.pcap 
+> xxd level02.pcap | grep -i pass -A10 -B10
+> xxd level02.pcap | cut -d ' ' -f2-9 | tr -d ' ' 👈 get midfields
+```
+
+- use Wireshark 
+  - _Analyze - Follow - TCP Stream_ - copy _TCP Stream_ to text
+
+```py
+infile = [[n[-2], n[-1]] for n in [_.split() for _ in open(0).read().split('\n') if len(_.split()) == 3]]
+res = ''
+for i, line in enumerate(infile):
+    print('line/', line, 'i/', i)
+    l, r = line
+    if l == '7f': res = res[:-1]
+    elif r != '.': res += r
+    else: assert(l == '0d')
+print('res/', res)
+
+# ft_waNDReL0L
 ```
 
+# 02 - token
+
+> su flag02
+Password: ft_waNDReL0L
+> su level03
+> Password: kooda2puivaav1idi4f57q8iq
+

level02/README.mdx

@@ -4,10 +4,44 @@
   - `realpath` - get the full absolute filepath
   - `scp` - secure copy - `scp username@ip:path _local_`
   - `~.pcap` - a Packet Capture to store network packet data captured during network traffic monitoring
+
 ```b
+### VM
 > ls -l
 ----r--r-- 1 flag02 level02 level02.pcap
 ^ which means a regular file
 
 > scp -P 4242 [email protected]:/home/user/level02/level02.pcap $(pwd)
+
+### Host
+> hexdump -C level02.pcap 
+> xxd level02.pcap 
+> xxd level02.pcap | grep -i pass -A10 -B10
+> xxd level02.pcap | cut -d ' ' -f2-9 | tr -d ' ' 👈 get midfields
+```
+
+- use Wireshark 
+  - _Analyze - Follow - TCP Stream_ - copy _TCP Stream_ to text
+
+```py
+infile = [[n[-2], n[-1]] for n in [_.split() for _ in open(0).read().split('\n') if len(_.split()) == 3]]
+res = ''
+for i, line in enumerate(infile):
+    print('line/', line, 'i/', i)
+    l, r = line
+    if l == '7f': res = res[:-1]
+    elif r != '.': res += r
+    else: assert(l == '0d')
+print('res/', res)
+
+# ft_waNDReL0L
+```
+
+# 02 - token
+
+```b
+> su flag02
+Password: ft_waNDReL0L
+> su level03
+> Password: kooda2puivaav1idi4f57q8iq
 ```

tokens.mdx

@@ -1,6 +1,10 @@
 ```b
 flag00  nottoohardhere 
 level01  x24ti5gi3x0ol2eh4esiuxias
+
 flag01  abcdefg
 level02  f2av5il02puano7naaf6adaaf
+
+flag02  ft_waNDReL0L
+level03  kooda2puivaav1idi4f57q8iq
 ```