bash - 如何按“块”文本拆分解析的文本？

Question

我正在编写一个运行 Nmap 网络扫描的 bash 脚本。在此之后，需要检查扫描并且需要提取相关位。

我需要从完成的扫描中提取 IP、MAC 和操作系统。问题是 Nmap 并不总是从扫描中获取操作系统，因此不会将其放入结果中。我需要在最终结果中关联 IP、MAC 和操作系统。

以下是测试扫描的示例：

Nmap scan report for 192.168.0.1
Host is up (0.0029s latency).
Not shown: 990 closed ports
PORT      STATE SERVICE
PORT#    STATE    XXXXXXX
MAC Address: MA:CA:DR:ES:S0:03 (Unknown)
Device type: general purpose
Running: Linux 2.6.X|3.X
OS CPE: cpe:/o:linux:linux_kernel:2.6 cpe:/o:linux:linux_kernel:3
OS details: Linux 2.6.32 - 3.13
Network Distance: 1 hop

Nmap scan report for 192.168.0.102
Host is up (0.0044s latency).
Not shown: 999 closed ports
PORT     STATE    SERVICE
PORT#    STATE    XXXXXXX
MAC Address: MA:CA:DR:ES:S0:02 (Sony Mobile Communications AB)
Too many fingerprints match this host to give specific OS details
Network Distance: 1 hop

Nmap scan report for 192.168.0.104
Host is up (0.00024s latency).
Not shown: 995 filtered ports
PORT     STATE SERVICE
PORT#    STATE XXXXXX
MAC Address: MA:CA:DR:ES:S0:01 (Micro-star Intl)
Warning: OSScan results may be unreliable because we could not find at least 1 open and 1 closed port
Device type: general purpose
Running (JUST GUESSING): Microsoft Windows 2008 (91%)
OS CPE: cpe:/o:microsoft:windows_server_2008::sp1 cpe:/o:microsoft:windows_server_2008:r2
Aggressive OS guesses: Microsoft Windows Server 2008 SP1 or Windows Server 2008 R2 (91%)
No exact OS matches for host (test conditions non-ideal).
Network Distance: 1 hop

还要注意上面示例中的最后一个是如何找不到操作系统的，在这种情况下，需要进行攻击猜测

最终结果需要是一个具有以下内容的文本文件：

192.168.0.1 - MA:CA:DR:ES:S0:03 - Linux 2.6.32 - 3.13
192.168.0.102 - MA:CA:DR:ES:S0:02 - Not found
192.168.0.104 - MA:CA:DR:ES:S0:01 - Microsoft Windows Server 2008 SP1 or Windows Server 2008 R2

我做了一些研究，但找不到任何解释我如何将 IP 与 mac 地址和文本块中的操作系统相关联的东西。

我有以下命令可用于简单扫描，其中 IP 和 Mac 地址彼此相邻

  while read line; do
    Mac="$(grep -oE '[A-Z0-9]{2}:[A-Z0-9]{2}:[A-Z0-9]{2}:[A-Z0-9]{2}:[A-Z0-9]{2}:[A-Z0-9]{2}' <<< "$line")"
    ip="$(grep -oE '[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}' <<< "$line")"
    echo -e $ip'\t-\t '$Mac >>/path/to/results.txt
  done </path/to/testscan.txt

我对 bash 脚本相当陌生，如果我遗漏了一些明显的东西，我深表歉意。

任何有兴趣的人的 nmap 命令是：

nmap -O --osscan-guess 192.168.0.0/24 -oN /path/to/testscan.txt

对不起，文字墙，我认为信息越多越好！

标签： bashparsingtextnmap

Answer 1

这很容易解析awk：

BEGIN {os_details="Not found"}

/^Nmap scan report/      {target=$5}
/^MAC Address/           {mac_address=$3}
/^OS details/            {os_details=substr($0, length("OS details: "))}
/^Aggressive OS guesses/ {
    os_details=substr($0, length("Aggressive OS guesses: "))
}

# This matches the blank lines between hosts
/^$/ {
    printf "%s - %s - %s\n", target, mac_address, os_details
    target=""
    mac_address=""
    os_details="Not found"
}

END {
    printf "%s - %s - %s\n", target, mac_address, os_details
}

在您的示例数据上运行它可以让您：

192.168.0.1 - MA:CA:DR:ES:S0:03 -  Linux 2.6.32 - 3.13
192.168.0.102 - MA:CA:DR:ES:S0:02 - Not found
192.168.0.104 - MA:CA:DR:ES:S0:01 -  Microsoft Windows Server 2008 SP1 or Windows Server 2008 R2 (91%)

我必须纠正我认为您的示例数据中的错误...我在MAC Address此处删除了该行之前的空白行：

Nmap scan report for 192.168.0.104
Host is up (0.00024s latency).
Not shown: 995 filtered ports
PORT     STATE SERVICE
PORT#    STATE XXXXXX

MAC Address: MA:CA:DR:ES:S0:01 (Micro-star Intl)