将字典值转换为字符串

Question

我正在处理 Nmap 脚本引擎的输出，但在字符串转换方面遇到了问题。

nmap 的结果将其放入字典中，我将其转换为字符串：

nm = nmap.PortScanner()
sslNmapOutput = nm.scan(hosts='192.168.2.50', arguments='--script ssl-enum-ciphers -p443')

sslOutput = ', '.join("%s=%s" % (key,val) for (key,val) in sslNmapOutput.iteritems())

resultString = re.search("warnings:(.*)SHA1\n", sslOutput)
resultString = result.group(1)
print sslOutput.strip()

这将打印以下内容：

nmap={'scanstats': {'uphosts': '1', 'timestr': 'Wed Mar 15 17:59:42 2017', 'downhosts': '0', 'totalhosts': '1', 'elapsed': '18.85'}, 'scaninfo': {'tcp': {'services': '443', 'method': 'syn'}}, 'command_line': 'nmap -oX - --script ssl-enum-ciphers -p443
192.168.2.50'}, scan={'192.168.2.50': {'status': {'state': 'up', 'reason': 'reset'}, 'hostnames': [{'type': '', 'name': ''}], 'vendor': {}, 'addresses': {'ipv4': '192.168.2.50'}, 'tcp': {443: {'product': '', 'state': 'open', 'version': '', 'name': 'https', 'conf': '3', 'script': {'ssl-enum-ciphers': '\n  SSLv3: \n    ciphers: \n      TLS_ECDHE_RSA_WITH_RC4_128_SHA (secp256r1) - C\n      TLS_RSA_WITH_RC4_128_SHA (rsa 2048) - C\n      TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA (secp256r1) - A\n      TLS_DHE_RSA_WITH_AES_256_CBC_SHA (dh 2048) - A\n      TLS_RSA_WITH_AES_256_CBC_SHA (rsa 2048) - A\n      TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA (secp256r1) - A\n      TLS_DHE_RSA_WITH_AES_128_CBC_SHA (dh 2048) - A\n      TLS_RSA_WITH_AES_128_CBC_SHA (rsa 2048) - A\n      TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA (secp256r1) - C\n      TLS_DHE_RSA_WITH_3DES_EDE_CBC_SHA (dh 2048) - C\n      TLS_RSA_WITH_3DES_EDE_CBC_SHA (rsa 2048) - C\n    compressors: \n      NULL\n    cipher preference: server\n    warnings: \n      64-bit block cipher 3DES vulnerable to SWEET32 attack\n      Broken cipher RC4 is deprecated by RFC 7465\n      CBC-mode cipher in SSLv3 (CVE-2014-3566)\n      Weak certificate signature: SHA1\n }, 'extrainfo': '', 'reason': 'syn-ack', 'cpe': ''}}}}

我想获取warnings: 和SHA1\n 之间的所有信息。但是，当我打印正则表达式的结果时，我得到以下信息：

\n      64-bit block cipher 3DES vulnerable to SWEET32 attack\n      Broken cipher RC4 is deprecated by RFC 7465\n      CBC-mode cipher in SSLv3 (CVE-2014-3566)\n      Weak certificate signature:

我想要打印的值与正确的空格和换行符缩进一样，如下所示：

test =  "\n      64-bit block cipher 3DES vulnerable to SWEET32 attack\n      Broken cipher RC4 is deprecated by RFC 7465\n      CBC-mode cipher in SSLv3 (CVE-2014-3566)\n      Weak certificate signature: "
print test.strip()

输出：

64-bit block cipher 3DES vulnerable to SWEET32 attack
Broken cipher RC4 is deprecated by RFC 7465
CBC-mode cipher in SSLv3 (CVE-2014-3566)
Weak certificate signature:

Answer 1

这是发生了什么的演示：

>>> s = 'a\nb'
>>> print s
a
b
>>> print {'key': s}
{'key': 'a\nb'}

sslNmapOutput 是一个字典，其值位于树的深处，包含实际的换行符。在本身是字典的立即值上调用str（通过%s）会创建一个字符串表示，其中内部值中的换行符被两个字符\n替换。不要将正则表达式应用于sslOutput。而是将其应用于 sslNmapOutput 中包含的原始字符串，在这种情况下可用作：

sslNmapOutput['scan']['192.168.2.50']['tcp'][443]['script']['ssl-enum-ciphers']