Author: markt
Date: Wed Jan 8 14:15:57 2014
New Revision: 1556540
URL: http://svn.apache.org/r1556540
Log:
Add support for limiting the size of chunk extensions when using chunked
encoding.
Modified:
tomcat/tc6.0.x/trunk/STATUS.txt
tomcat/tc6.0.x/trunk/java/org/apache/coyote/Constants.java
tomcat/tc6.0.x/trunk/java/org/apache/coyote/http11/filters/ChunkedInputFilter.java
tomcat/tc6.0.x/trunk/webapps/docs/changelog.xml
tomcat/tc6.0.x/trunk/webapps/docs/config/systemprops.xml
Modified: tomcat/tc6.0.x/trunk/STATUS.txt
URL:
http://svn.apache.org/viewvc/tomcat/tc6.0.x/trunk/STATUS.txt?rev=1556540&r1=1556539&r2=1556540&view=diff
==============================================================================
--- tomcat/tc6.0.x/trunk/STATUS.txt (original)
+++ tomcat/tc6.0.x/trunk/STATUS.txt Wed Jan 8 14:15:57 2014
@@ -32,12 +32,6 @@ PATCHES PROPOSED TO BACKPORT:
[ New proposals should be added at the end of the list ]
-* Add support for limiting the size of chunk extensions when using chunked
- encoding.
-
http://people.apache.org/~markt/patches/2013-12-17-chunk-extensions-tc6-v2.patch
- +1: markt, kkolinko, remm, jboynes
- -1:
-
* Fix https://issues.apache.org/bugzilla/show_bug.cgi?id=55749
Improve the error message when SSLEngine is disabled in AprLifecycleListener
and SSL is configured for an APR/native connector.
Modified: tomcat/tc6.0.x/trunk/java/org/apache/coyote/Constants.java
URL:
http://svn.apache.org/viewvc/tomcat/tc6.0.x/trunk/java/org/apache/coyote/Constants.java?rev=1556540&r1=1556539&r2=1556540&view=diff
==============================================================================
--- tomcat/tc6.0.x/trunk/java/org/apache/coyote/Constants.java (original)
+++ tomcat/tc6.0.x/trunk/java/org/apache/coyote/Constants.java Wed Jan 8
14:15:57 2014
@@ -76,4 +76,13 @@ public final class Constants {
Integer.parseInt(System.getProperty(
"org.apache.coyote.MAX_TRAILER_SIZE",
"8192"));
+
+ /**
+ * Limit on the total length of the extension data in
+ * a chunked HTTP request.
+ */
+ public static final int MAX_EXTENSION_SIZE =
+ Integer.parseInt(System.getProperty(
+ "org.apache.coyote.MAX_EXTENSION_SIZE",
+ "8192"));
}
Modified:
tomcat/tc6.0.x/trunk/java/org/apache/coyote/http11/filters/ChunkedInputFilter.java
URL:
http://svn.apache.org/viewvc/tomcat/tc6.0.x/trunk/java/org/apache/coyote/http11/filters/ChunkedInputFilter.java?rev=1556540&r1=1556539&r2=1556540&view=diff
==============================================================================
---
tomcat/tc6.0.x/trunk/java/org/apache/coyote/http11/filters/ChunkedInputFilter.java
(original)
+++
tomcat/tc6.0.x/trunk/java/org/apache/coyote/http11/filters/ChunkedInputFilter.java
Wed Jan 8 14:15:57 2014
@@ -114,6 +114,12 @@ public class ChunkedInputFilter implemen
/**
+ * Size of extensions processed for this request.
+ */
+ private long extensionSize;
+
+
+ /**
* Flag set to true if the next call to doRead() must parse a CRLF pair
* before doing anything else.
*/
@@ -248,6 +254,10 @@ public class ChunkedInputFilter implemen
endChunk = false;
needCRLFParse = false;
trailingHeaders.recycle();
+ if (org.apache.coyote.Constants.MAX_TRAILER_SIZE > 0) {
+
trailingHeaders.setLimit(org.apache.coyote.Constants.MAX_TRAILER_SIZE);
+ }
+ extensionSize = 0;
}
@@ -294,7 +304,7 @@ public class ChunkedInputFilter implemen
int result = 0;
boolean eol = false;
boolean readDigit = false;
- boolean trailer = false;
+ boolean extension = false;
while (!eol) {
@@ -306,9 +316,13 @@ public class ChunkedInputFilter implemen
if (buf[pos] == Constants.CR || buf[pos] == Constants.LF) {
parseCRLF(false);
eol = true;
- } else if (buf[pos] == Constants.SEMI_COLON) {
- trailer = true;
- } else if (!trailer) {
+ } else if (buf[pos] == Constants.SEMI_COLON && !extension) {
+ // First semi-colon marks the start of the extension. Further
+ // semi-colons may appear to separate multiple
chunk-extensions.
+ // These need to be processed as part of parsing the
extensions.
+ extension = true;
+ extensionSize++;
+ } else if (!extension) {
//don't read data after the trailer
int charValue = HexUtils.getDec(buf[pos]);
if (charValue != -1) {
@@ -320,6 +334,15 @@ public class ChunkedInputFilter implemen
//in the chunked header
return false;
}
+ } else {
+ // Extension 'parsing'
+ // Note that the chunk-extension is neither parsed nor
+ // validated. Currently it is simply ignored.
+ extensionSize++;
+ if (org.apache.coyote.Constants.MAX_EXTENSION_SIZE > -1 &&
+ extensionSize >
org.apache.coyote.Constants.MAX_EXTENSION_SIZE) {
+ throw new IOException("maxExtensionSize exceeded");
+ }
}
// Parsing the CRLF increments pos
@@ -485,6 +508,15 @@ public class ChunkedInputFilter implemen
chr = buf[pos];
if ((chr == Constants.SP) || (chr == Constants.HT)) {
pos++;
+ // If we swallow whitespace, make sure it counts towards
the
+ // limit placed on trailing header size (if there is one)
+ if (trailingHeaders.getLimit() != -1) {
+ int newlimit = trailingHeaders.getLimit() -1;
+ if (trailingHeaders.getEnd() > newlimit) {
+ throw new IOException("Exceeded maxTrailerSize");
+ }
+ trailingHeaders.setLimit(newlimit);
+ }
} else {
space = false;
}
Modified: tomcat/tc6.0.x/trunk/webapps/docs/changelog.xml
URL:
http://svn.apache.org/viewvc/tomcat/tc6.0.x/trunk/webapps/docs/changelog.xml?rev=1556540&r1=1556539&r2=1556540&view=diff
==============================================================================
--- tomcat/tc6.0.x/trunk/webapps/docs/changelog.xml (original)
+++ tomcat/tc6.0.x/trunk/webapps/docs/changelog.xml Wed Jan 8 14:15:57 2014
@@ -108,6 +108,10 @@
<fix>
Better adherence to RFC2616 for content-length headers. (markt)
</fix>
+ <fix>
+ Add support for limiting the size of chunk extensions when using
chunked
+ encoding. (markt)
+ </fix>
</changelog>
</subsection>
<subsection name="Jasper">
Modified: tomcat/tc6.0.x/trunk/webapps/docs/config/systemprops.xml
URL:
http://svn.apache.org/viewvc/tomcat/tc6.0.x/trunk/webapps/docs/config/systemprops.xml?rev=1556540&r1=1556539&r2=1556540&view=diff
==============================================================================
--- tomcat/tc6.0.x/trunk/webapps/docs/config/systemprops.xml (original)
+++ tomcat/tc6.0.x/trunk/webapps/docs/config/systemprops.xml Wed Jan 8
14:15:57 2014
@@ -420,6 +420,13 @@
<properties>
+ <property name="org.apache.coyote.MAX_EXTENSION_SIZE">
+ <p>Limits the total length of extension data when using chunked encoding.
+ If the value is <code>-1</code>, no limit will be imposed.</p>
+ <p>If not specified, the default value of <code>8192</code> will be
+ used.</p>
+ </property>
+
<property name="org.apache.coyote.MAX_TRAILER_SIZE">
<p>Limits the total length of trailing headers in the last chunk of
a chunked HTTP request.
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