XML属性に基づいてNokogiri検索を行う方法

XMLファイルを検索し、属性がnmapファイルに存在するかどうかに基づいて結果を表示しようとしています。私は基本的な構文解析（または私は思う）を持っているが、与えられたXMLフィールドが与えられたホストに対して存在しないとしても、Rubyスクリプトは明らかに間違っている。XML属性に基づいてNokogiri検索を行う方法

XMLファイルには、次のとおりです。

<?xml version="1.0" encoding="UTF-8"?> 
<!DOCTYPE nmaprun> 
<?xml-stylesheet href="file:///usr/local/bin/../share/nmap/nmap.xsl" type="text/xsl"?> 
<!-- Nmap 7.12 scan initiated Mon May 23 15:53:44 2016 as: nmap -&#45;script /Users/me/Coding/nse_scripts/ssl-poodle.nse -oX poodle_results.txt 10.10.10.0/24 --> 
<nmaprun scanner="nmap" args="nmap -&#45;script /Users/me/Coding/nse_scripts/ssl-poodle.nse -oX poodle_results.txt 10.10.10.0/24" start="1464033224" startstr="Mon May 23 15:53:44 2016" version="7.12" xmloutputversion="1.04"> 
<scaninfo type="connect" protocol="tcp" numservices="1000" services="1,3-4,6-7,9,13,17,19-26,30,32-33,37,42-43,49,53,70,79-85,88-90,99-100,106,109-111,113,119,125,135,139,143-144,146,161,163,179,199,211-212,222,254-256,259,264,280,301,306,311,340,366,389,406-407,416-417,425,427,443-445,458,464-465,481,497,500,512-515,524,541,543-545,548,554-555,563,587,593,616-617,625,631,636,646,648,666-668,683,687,691,700,705,711,714,720,722,726,749,765,777,783,787,800-801,808,843,873,880,888,898,900-903,911-912,981,987,990,992-993,995,999-1002,1007,1009-1011,1021-1100,1102,1104-1108,1110-1114,1117,1119,1121-1124,1126,1130-1132,1137-1138,1141,1145,1147-1149,1151-1152,1154,1163-1166,1169,1174-1175,1183,1185-1187,1192,1198-1199,1201,1213,1216-1218,1233-1234,1236,1244,1247-1248,1259,1271-1272,1277,1287,1296,1300-1301,1309-1311,1322,1328,1334,1352,1417,1433-1434,1443,1455,1461,1494,1500-1501,1503,1521,1524,1533,1556,1580,1583,1594,1600,1641,1658,1666,1687-1688,1700,1717-1721,1723,1755,1761,1782-1783,1801,1805,1812,1839-1840,1862-1864,1875,1900,1914,1935,1947,1971-1972,1974,1984,1998-2010,2013,2020-2022,2030,2033-2035,2038,2040-2043,2045-2049,2065,2068,2099-2100,2103,2105-2107,2111,2119,2121,2126,2135,2144,2160-2161,2170,2179,2190-2191,2196,2200,2222,2251,2260,2288,2301,2323,2366,2381-2383,2393-2394,2399,2401,2492,2500,2522,2525,2557,2601-2602,2604-2605,2607-2608,2638,2701-2702,2710,2717-2718,2725,2800,2809,2811,2869,2875,2909-2910,2920,2967-2968,2998,3000-3001,3003,3005-3007,3011,3013,3017,3030-3031,3052,3071,3077,3128,3168,3211,3221,3260-3261,3268-3269,3283,3300-3301,3306,3322-3325,3333,3351,3367,3369-3372,3389-3390,3404,3476,3493,3517,3527,3546,3551,3580,3659,3689-3690,3703,3737,3766,3784,3800-3801,3809,3814,3826-3828,3851,3869,3871,3878,3880,3889,3905,3914,3918,3920,3945,3971,3986,3995,3998,4000-4006,4045,4111,4125-4126,4129,4224,4242,4279,4321,4343,4443-4446,4449,4550,4567,4662,4848,4899-4900,4998,5000-5004,5009,5030,5033,5050-5051,5054,5060-5061,5080,5087,5100-5102,5120,5190,5200,5214,5221-5222,5225-5226,5269,5280,5298,5357,5405,5414,5431-5432,5440,5500,5510,5544,5550,5555,5560,5566,5631,5633,5666,5678-5679,5718,5730,5800-5802,5810-5811,5815,5822,5825,5850,5859,5862,5877,5900-5904,5906-5907,5910-5911,5915,5922,5925,5950,5952,5959-5963,5987-5989,5998-6007,6009,6025,6059,6100-6101,6106,6112,6123,6129,6156,6346,6389,6502,6510,6543,6547,6565-6567,6580,6646,6666-6669,6689,6692,6699,6779,6788-6789,6792,6839,6881,6901,6969,7000-7002,7004,7007,7019,7025,7070,7100,7103,7106,7200-7201,7402,7435,7443,7496,7512,7625,7627,7676,7741,7777-7778,7800,7911,7920-7921,7937-7938,7999-8002,8007-8011,8021-8022,8031,8042,8045,8080-8090,8093,8099-8100,8180-8181,8192-8194,8200,8222,8254,8290-8292,8300,8333,8383,8400,8402,8443,8500,8600,8649,8651-8652,8654,8701,8800,8873,8888,8899,8994,9000-9003,9009-9011,9040,9050,9071,9080-9081,9090-9091,9099-9103,9110-9111,9200,9207,9220,9290,9415,9418,9485,9500,9502-9503,9535,9575,9593-9595,9618,9666,9876-9878,9898,9900,9917,9929,9943-9944,9968,9998-10004,10009-10010,10012,10024-10025,10082,10180,10215,10243,10566,10616-10617,10621,10626,10628-10629,10778,11110-11111,11967,12000,12174,12265,12345,13456,13722,13782-13783,14000,14238,14441-14442,15000,15002-15004,15660,15742,16000-16001,16012,16016,16018,16080,16113,16992-16993,17877,17988,18040,18101,18988,19101,19283,19315,19350,19780,19801,19842,20000,20005,20031,20221-20222,20828,21571,22939,23502,24444,24800,25734-25735,26214,27000,27352-27353,27355-27356,27715,28201,30000,30718,30951,31038,31337,32768-32785,33354,33899,34571-34573,35500,38292,40193,40911,41511,42510,44176,44442-44443,44501,45100,48080,49152-49161,49163,49165,49167,49175-49176,49400,49999-50003,50006,50300,50389,50500,50636,50800,51103,51493,52673,52822,52848,52869,54045,54328,55055-55056,55555,55600,56737-56738,57294,57797,58080,60020,60443,61532,61900,62078,63331,64623,64680,65000,65129,65389"/> 
<verbose level="0"/> 
<debugging level="0"/> 
<host starttime="1464033224" endtime="1464034228"><status state="up" reason="syn-ack" reason_ttl="0"/> 
<address addr="10.10.10.1" addrtype="ipv4"/> 
<hostnames> 
<hostname name="DD-WRT" type="PTR"/> 
</hostnames> 
<ports><extraports state="closed" count="996"> 
<extrareasons reason="conn-refused" count="996"/> 
</extraports> 
<port protocol="tcp" portid="22"><state state="open" reason="syn-ack" reason_ttl="0"/><service name="ssh" method="table" conf="3"/></port> 
<port protocol="tcp" portid="53"><state state="open" reason="syn-ack" reason_ttl="0"/><service name="domain" method="table" conf="3"/></port> 
<port protocol="tcp" portid="80"><state state="open" reason="syn-ack" reason_ttl="0"/><service name="http" method="table" conf="3"/></port> 
<port protocol="tcp" portid="443"><state state="open" reason="syn-ack" reason_ttl="0"/><service name="https" method="table" conf="3"/><script id="ssl-poodle" output="&#xa; VULNERABLE:&#xa; SSL POODLE information leak&#xa; State: VULNERABLE&#xa; IDs: OSVDB:113251 CVE:CVE-2014-3566&#xa;   The SSL protocol 3.0, as used in OpenSSL through 1.0.1i and&#xa;   other products, uses nondeterministic CBC padding, which makes it easier&#xa;   for man-in-the-middle attackers to obtain cleartext data via a&#xa;   padding-oracle attack, aka the &quot;POODLE&quot; issue.&#xa; Disclosure date: 2014-10-14&#xa; Check results:&#xa;  TLS_RSA_WITH_3DES_EDE_CBC_SHA&#xa; References:&#xa;  https://www.imperialviolet.org/2014/10/14/poodle.html&#xa;  http://osvdb.org/113251&#xa;  https://www.openssl.org/~bodo/ssl-poodle.pdf&#xa;  https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-3566&#xa;"><table key="CVE-2014-3566"> 
<elem key="title">SSL POODLE information leak</elem> 
<elem key="state">VULNERABLE</elem> 
<table key="ids"> 
<elem>OSVDB:113251</elem> 
<elem>CVE:CVE-2014-3566</elem> 
</table> 
<table key="description"> 
<elem> The SSL protocol 3.0, as used in OpenSSL through 1.0.1i and&#xa; other products, uses nondeterministic CBC padding, which makes it easier&#xa; for man-in-the-middle attackers to obtain cleartext data via a&#xa; padding-oracle attack, aka the &quot;POODLE&quot; issue.</elem> 
</table> 
<table key="dates"> 
<table key="disclosure"> 
<elem key="day">14</elem> 
<elem key="month">10</elem> 
<elem key="year">2014</elem> 
</table> 
</table> 
<elem key="disclosure">2014-10-14</elem> 
<table key="check_results"> 
<elem>TLS_RSA_WITH_3DES_EDE_CBC_SHA</elem> 
</table> 
<table key="refs"> 
<elem>https://www.imperialviolet.org/2014/10/14/poodle.html</elem> 
<elem>http://osvdb.org/113251</elem> 
<elem>https://www.openssl.org/~bodo/ssl-poodle.pdf</elem> 
<elem>https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-3566</elem> 
</table> 
</table> 
</script></port> 
</ports> 
<times srtt="17618" rttvar="3666" to="100000"/> 
</host> 

<host starttime="1464033224" endtime="1464034228"><status state="up" reason="conn-refused" reason_ttl="0"/> 
<address addr="10.10.10.100" addrtype="ipv4"/> 
<hostnames> 
</hostnames> 
<ports><extraports state="closed" count="1000"> 
<extrareasons reason="conn-refused" count="1000"/> 
</extraports> 
</ports> 
<times srtt="15580" rttvar="11919" to="100000"/> 
</host> 

<host starttime="1464033224" endtime="1464034228"><status state="up" reason="conn-refused" reason_ttl="0"/> 
<address addr="10.10.10.101" addrtype="ipv4"/> 
<hostnames> 
<hostname name="office" type="PTR"/> 
</hostnames> 
<ports><extraports state="closed" count="999"> 
<extrareasons reason="conn-refused" count="999"/> 
</extraports> 
<port protocol="tcp" portid="22"><state state="open" reason="syn-ack" reason_ttl="0"/><service name="ssh" method="table" conf="3"/></port> 
</ports> 
<times srtt="12241" rttvar="4711" to="100000"/> 
</host> 

<host starttime="1464033224" endtime="1464034228"><status state="up" reason="conn-refused" reason_ttl="0"/> 
<address addr="10.10.10.104" addrtype="ipv4"/> 
<hostnames> 
<hostname name="main" type="PTR"/> 
</hostnames> 
<ports><extraports state="closed" count="999"> 
<extrareasons reason="conn-refused" count="999"/> 
</extraports> 
<port protocol="tcp" portid="22"><state state="open" reason="syn-ack" reason_ttl="0"/><service name="ssh" method="table" conf="3"/></port> 
</ports> 
<times srtt="14409" rttvar="1988" to="100000"/> 
</host> 

<host starttime="1464033224" endtime="1464034228"><status state="up" reason="conn-refused" reason_ttl="0"/> 
<address addr="10.10.10.115" addrtype="ipv4"/> 
<hostnames> 
<hostname name="c8d10f5c386d4e4bb01d7aa0edac7a24" type="PTR"/> 
</hostnames> 
<ports><extraports state="closed" count="998"> 
<extrareasons reason="conn-refused" count="998"/> 
</extraports> 
<port protocol="tcp" portid="22"><state state="open" reason="syn-ack" reason_ttl="0"/><service name="ssh" method="table" conf="3"/></port> 
<port protocol="tcp" portid="10000"><state state="open" reason="syn-ack" reason_ttl="0"/><service name="snet-sensor-mgmt" method="table" conf="3"/></port> 
</ports> 
<times srtt="4009" rttvar="2037" to="100000"/> 
</host> 

<host starttime="1464033224" endtime="1464034228"><status state="up" reason="syn-ack" reason_ttl="0"/> 
<address addr="10.10.10.121" addrtype="ipv4"/> 
<hostnames> 
<hostname name="OpenELEC" type="PTR"/> 
</hostnames> 
<ports><extraports state="closed" count="995"> 
<extrareasons reason="conn-refused" count="995"/> 
</extraports> 
<port protocol="tcp" portid="22"><state state="open" reason="syn-ack" reason_ttl="0"/><service name="ssh" method="table" conf="3"/></port> 
<port protocol="tcp" portid="80"><state state="open" reason="syn-ack" reason_ttl="0"/><service name="http" method="table" conf="3"/></port> 
<port protocol="tcp" portid="111"><state state="open" reason="syn-ack" reason_ttl="0"/><service name="rpcbind" method="table" conf="3"/></port> 
<port protocol="tcp" portid="445"><state state="open" reason="syn-ack" reason_ttl="0"/><service name="microsoft-ds" method="table" conf="3"/></port> 
<port protocol="tcp" portid="1049"><state state="open" reason="syn-ack" reason_ttl="0"/><service name="td-postman" method="table" conf="3"/></port> 
</ports> 
<times srtt="11099" rttvar="4538" to="100000"/> 
</host> 

<host starttime="1464033224" endtime="1464033238"><status state="up" reason="conn-refused" reason_ttl="0"/> 
<address addr="10.10.10.130" addrtype="ipv4"/> 
<hostnames> 
<hostname name="Justins-iMac" type="PTR"/> 
</hostnames> 
<ports><extraports state="closed" count="1000"> 
<extrareasons reason="conn-refused" count="1000"/> 
</extraports> 
</ports> 
<times srtt="455" rttvar="155" to="100000"/> 
</host> 

<host starttime="1464033224" endtime="1464034248"><status state="up" reason="conn-refused" reason_ttl="0"/> 
<address addr="10.10.10.135" addrtype="ipv4"/> 
<hostnames> 
<hostname name="HarmonyHub" type="PTR"/> 
</hostnames> 
<ports><extraports state="closed" count="997"> 
<extrareasons reason="conn-refused" count="997"/> 
</extraports> 
<port protocol="tcp" portid="5222"><state state="open" reason="syn-ack" reason_ttl="0"/><service name="xmpp-client" method="table" conf="3"/></port> 
<port protocol="tcp" portid="8088"><state state="open" reason="syn-ack" reason_ttl="0"/><service name="radan-http" method="table" conf="3"/></port> 
<port protocol="tcp" portid="8222"><state state="open" reason="syn-ack" reason_ttl="0"/><service name="unknown" method="table" conf="3"/></port> 
</ports> 
<times srtt="28872" rttvar="2401" to="100000"/> 
</host> 

<host starttime="1464033224" endtime="1464034228"><status state="up" reason="syn-ack" reason_ttl="0"/> 
<address addr="10.10.10.137" addrtype="ipv4"/> 
<hostnames> 
<hostname name="HP1A4DC4" type="PTR"/> 
</hostnames> 
<ports><extraports state="closed" count="985"> 
<extrareasons reason="conn-refused" count="985"/> 
</extraports> 
<port protocol="tcp" portid="80"><state state="open" reason="syn-ack" reason_ttl="0"/><service name="http" method="table" conf="3"/></port> 
<port protocol="tcp" portid="139"><state state="open" reason="syn-ack" reason_ttl="0"/><service name="netbios-ssn" method="table" conf="3"/></port> 
<port protocol="tcp" portid="443"><state state="open" reason="syn-ack" reason_ttl="0"/><service name="https" method="table" conf="3"/></port> 
<port protocol="tcp" portid="445"><state state="open" reason="syn-ack" reason_ttl="0"/><service name="microsoft-ds" method="table" conf="3"/></port> 
<port protocol="tcp" portid="631"><state state="open" reason="syn-ack" reason_ttl="0"/><service name="ipp" method="table" conf="3"/></port> 
<port protocol="tcp" portid="6839"><state state="open" reason="syn-ack" reason_ttl="0"/><service name="unknown" method="table" conf="3"/></port> 
<port protocol="tcp" portid="7435"><state state="open" reason="syn-ack" reason_ttl="0"/><service name="unknown" method="table" conf="3"/></port> 
<port protocol="tcp" portid="8080"><state state="open" reason="syn-ack" reason_ttl="0"/><service name="http-proxy" method="table" conf="3"/></port> 
<port protocol="tcp" portid="9100"><state state="open" reason="syn-ack" reason_ttl="0"/><service name="jetdirect" method="table" conf="3"/></port> 
<port protocol="tcp" portid="9101"><state state="open" reason="syn-ack" reason_ttl="0"/><service name="jetdirect" method="table" conf="3"/></port> 
<port protocol="tcp" portid="9102"><state state="open" reason="syn-ack" reason_ttl="0"/><service name="jetdirect" method="table" conf="3"/></port> 
<port protocol="tcp" portid="9110"><state state="open" reason="syn-ack" reason_ttl="0"/><service name="unknown" method="table" conf="3"/></port> 
<port protocol="tcp" portid="9111"><state state="open" reason="syn-ack" reason_ttl="0"/><service name="DragonIDSConsole" method="table" conf="3"/></port> 
<port protocol="tcp" portid="9220"><state state="open" reason="syn-ack" reason_ttl="0"/><service name="unknown" method="table" conf="3"/></port> 
<port protocol="tcp" portid="9290"><state state="open" reason="syn-ack" reason_ttl="0"/><service name="unknown" method="table" conf="3"/></port> 
</ports> 
<times srtt="6912" rttvar="5486" to="100000"/> 
</host> 

<host starttime="1464033224" endtime="1464034228"><status state="up" reason="conn-refused" reason_ttl="0"/> 
<address addr="10.10.10.144" addrtype="ipv4"/> 
<hostnames> 
<hostname name="time-capsule" type="PTR"/> 
</hostnames> 
<ports><extraports state="closed" count="995"> 
<extrareasons reason="conn-refused" count="995"/> 
</extraports> 
<port protocol="tcp" portid="139"><state state="open" reason="syn-ack" reason_ttl="0"/><service name="netbios-ssn" method="table" conf="3"/></port> 
<port protocol="tcp" portid="445"><state state="open" reason="syn-ack" reason_ttl="0"/><service name="microsoft-ds" method="table" conf="3"/></port> 
<port protocol="tcp" portid="548"><state state="open" reason="syn-ack" reason_ttl="0"/><service name="afp" method="table" conf="3"/></port> 
<port protocol="tcp" portid="5009"><state state="open" reason="syn-ack" reason_ttl="0"/><service name="airport-admin" method="table" conf="3"/></port> 
<port protocol="tcp" portid="10000"><state state="open" reason="syn-ack" reason_ttl="0"/><service name="snet-sensor-mgmt" method="table" conf="3"/></port> 
</ports> 
<times srtt="24675" rttvar="20640" to="107235"/> 
</host> 

<runstats><finished time="1464034248" timestr="Mon May 23 16:10:48 2016" elapsed="1024.26" summary="Nmap done at Mon May 23 16:10:48 2016; 256 IP addresses (10 hosts up) scanned in 1024.26 seconds" exit="success"/><hosts up="10" down="246" total="256"/> 
</runstats> 
</nmaprun>

私のRubyスクリプトは次のとおりです。

require 'nokogiri' 

document = Nokogiri::XML(File.open("poodle_results.txt")) 

document.xpath("//host").each do |host| 
    ip_address = host.at_xpath("address[@addrtype='ipv4']").at_xpath("@addr").value 
    result = host.at_xpath("//ports//elem[@key='state']").content 
    puts "#{ip_address} #{result}" 
end

このファイルには10台のホストが、<elem key="state">タグを持っているだけです。それが明確に各ホストを反復処理なので、私は、私が間違って何をやったかについては、この時点で困惑している

10.10.10.1 VULNERABLE 
10.10.10.100 VULNERABLE 
10.10.10.101 VULNERABLE 
10.10.10.104 VULNERABLE 
10.10.10.115 VULNERABLE 
10.10.10.121 VULNERABLE 
10.10.10.130 VULNERABLE 
10.10.10.135 VULNERABLE 
10.10.10.137 VULNERABLE 
10.10.10.144 VULNERABLE

：しかし、私の出力は次のようになります。表示された最後の9ホストには<host></host>セクション内に<elem key="state">タグが含まれていないため、出力に含めないでください。

<elem key="state">タグが存在しない場合は、その結果が、キーを持つホストを「VULNERABLE」にすると予想されます。

10.10.10.1 VULNERABLE

出典

2016-05-23 Godzilla74

ようこそ。質問する際には、問題を示すために必要な最小限の入力データを減らす必要があります。それを越えるものは、私たちがそれを検索し、直接関係しないものを捨てなければならないので、私たちの時間を無駄にします。「[mcve]」をお読みください。私たちのお手伝いをしてください。 –

あなたの結果を得るために不一致要素をループ労力を費やす必要がないようにこれは、最初にあなたに正しいXPathを提供します：

document.xpath("//host[.//elem/@key='state']").each do |host| 
    ip_address = host.at_xpath("address[@addrtype='ipv4']").at_xpath("@addr").value 
    result = host.at_xpath("//ports//elem[@key='state']").content 
    puts "#{ip_address} #{result}" 
end

これは「状態」の値を持つkey属性を持つサブ要素を有するhostすべての要素を選択します。実際には必要な要素のみが返されるため、ループ内での一致が正しいかどうかを確認する必要はありません。あなたの質問に対する完全なXPathソリューションです。

出典

2016-05-23 22:19:05

ああ、それは甘い...はるかに効率的！ – Godzilla74

ええ、nmapログの山がある場合、これは一桁速く実行できます。いくつかのCPU時間を節約し、冷却指数を削減します。：D –

elemはファインダーから削除「//」

document.xpath("//host").each do |host| 
    ip_address = host.at_xpath("address[@addrtype='ipv4']").at_xpath("@addr").value 
    path = host.at_xpath("ports//elem[@key='state']") 
    next unless path 
    puts "#{ip_address} #{result}" if path.content 
end

出典

2016-05-23 22:02:13

ありがとう、それは私が行方不明だったものです。 – Godzilla74

XML属性に基づいてNokogiri検索を行う方法

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