Author: violetagg
Date: Wed Oct 28 20:03:42 2015
New Revision: 1711114
URL: http://svn.apache.org/viewvc?rev=1711114&view=rev
Log:
Merged revision 1709120 from tomcat/trunk:
Basic implementation for CSRF protection for REST.
Documentation will follow.
Added:
tomcat/tc8.0.x/trunk/java/org/apache/catalina/filters/RestCsrfPreventionFilter.java
- copied, changed from r1709120,
tomcat/trunk/java/org/apache/catalina/filters/RestCsrfPreventionFilter.java
tomcat/tc8.0.x/trunk/test/org/apache/catalina/filters/TestRestCsrfPreventionFilter.java
- copied unchanged from r1709120,
tomcat/trunk/test/org/apache/catalina/filters/TestRestCsrfPreventionFilter.java
Modified:
tomcat/tc8.0.x/trunk/ (props changed)
tomcat/tc8.0.x/trunk/java/org/apache/catalina/filters/Constants.java
tomcat/tc8.0.x/trunk/java/org/apache/catalina/filters/LocalStrings.properties
Propchange: tomcat/tc8.0.x/trunk/
------------------------------------------------------------------------------
--- svn:mergeinfo (original)
+++ svn:mergeinfo Wed Oct 28 20:03:42 2015
@@ -1 +1 @@
-/tomcat/trunk:1636524,1637156,1637176,1637188,1637331,1637684,1637695,1638720-1638725,1639653,1640010,1640083-1640084,1640088,1640275,1640322,1640347,1640361,1640365,1640403,1640410,1640652,1640655-1640658,1640688,1640700-1640883,1640903,1640976,1640978,1641000,1641026,1641038-1641039,1641051-1641052,1641058,1641064,1641300,1641369,1641374,1641380,1641486,1641634,1641656-1641692,1641704,1641707-1641718,1641720-1641722,1641735,1641981,1642233,1642280,1642554,1642564,1642595,1642606,1642668,1642679,1642697,1642699,1642766,1643002,1643045,1643054-1643055,1643066,1643121,1643128,1643206,1643209-1643210,1643216,1643249,1643270,1643283,1643309-1643310,1643323,1643365-1643366,1643370-1643371,1643465,1643474,1643536,1643570,1643634,1643649,1643651,1643654,1643675,1643731,1643733-1643734,1643761,1643766,1643814,1643937,1643963,1644017,1644169,1644201-1644203,1644321,1644323,1644516,1644523,1644529,1644535,1644730,1644768,1644784-1644785,1644790,1644793,1644815,1644884,1644886,1644890,1644892
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+/tomcat/trunk:1636524,1637156,1637176,1637188,1637331,1637684,1637695,1638720-1638725,1639653,1640010,1640083-1640084,1640088,1640275,1640322,1640347,1640361,1640365,1640403,1640410,1640652,1640655-1640658,1640688,1640700-1640883,1640903,1640976,1640978,1641000,1641026,1641038-1641039,1641051-1641052,1641058,1641064,1641300,1641369,1641374,1641380,1641486,1641634,1641656-1641692,1641704,1641707-1641718,1641720-1641722,1641735,1641981,1642233,1642280,1642554,1642564,1642595,1642606,1642668,1642679,1642697,1642699,1642766,1643002,1643045,1643054-1643055,1643066,1643121,1643128,1643206,1643209-1643210,1643216,1643249,1643270,1643283,1643309-1643310,1643323,1643365-1643366,1643370-1643371,1643465,1643474,1643536,1643570,1643634,1643649,1643651,1643654,1643675,1643731,1643733-1643734,1643761,1643766,1643814,1643937,1643963,1644017,1644169,1644201-1644203,1644321,1644323,1644516,1644523,1644529,1644535,1644730,1644768,1644784-1644785,1644790,1644793,1644815,1644884,1644886,1644890,1644892
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Modified: tomcat/tc8.0.x/trunk/java/org/apache/catalina/filters/Constants.java
URL:
http://svn.apache.org/viewvc/tomcat/tc8.0.x/trunk/java/org/apache/catalina/filters/Constants.java?rev=1711114&r1=1711113&r2=1711114&view=diff
==============================================================================
--- tomcat/tc8.0.x/trunk/java/org/apache/catalina/filters/Constants.java
(original)
+++ tomcat/tc8.0.x/trunk/java/org/apache/catalina/filters/Constants.java Wed
Oct 28 20:03:42 2015
@@ -34,4 +34,13 @@ public final class Constants {
"org.apache.catalina.filters.CSRF_NONCE";
public static final String METHOD_GET = "GET";
+
+ public static final String CSRF_REST_NONCE_HEADER_NAME = "X-CSRF-Token";
+
+ public static final String CSRF_REST_NONCE_HEADER_FETCH_VALUE = "Fetch";
+
+ public static final String CSRF_REST_NONCE_HEADER_REQUIRED_VALUE =
"Required";
+
+ public static final String CSRF_REST_NONCE_SESSION_ATTR_NAME =
+ "org.apache.catalina.filters.CSRF_REST_NONCE";
}
Modified:
tomcat/tc8.0.x/trunk/java/org/apache/catalina/filters/LocalStrings.properties
URL:
http://svn.apache.org/viewvc/tomcat/tc8.0.x/trunk/java/org/apache/catalina/filters/LocalStrings.properties?rev=1711114&r1=1711113&r2=1711114&view=diff
==============================================================================
---
tomcat/tc8.0.x/trunk/java/org/apache/catalina/filters/LocalStrings.properties
(original)
+++
tomcat/tc8.0.x/trunk/java/org/apache/catalina/filters/LocalStrings.properties
Wed Oct 28 20:03:42 2015
@@ -48,3 +48,4 @@ httpHeaderSecurityFilter.committed=Unabl
httpHeaderSecurityFilter.clickjack.invalid=An invalid value [{0}] was
specified for the anti click-jacking header
remoteIpFilter.invalidLocation=Failed to modify the rewrite location [{0}] to
use scheme [{1}] and port [{2}]
+restCsrfPreventionFilter.invalidNonce=CSRF nonce validation failed
\ No newline at end of file
Copied:
tomcat/tc8.0.x/trunk/java/org/apache/catalina/filters/RestCsrfPreventionFilter.java
(from r1709120,
tomcat/trunk/java/org/apache/catalina/filters/RestCsrfPreventionFilter.java)
URL:
http://svn.apache.org/viewvc/tomcat/tc8.0.x/trunk/java/org/apache/catalina/filters/RestCsrfPreventionFilter.java?p2=tomcat/tc8.0.x/trunk/java/org/apache/catalina/filters/RestCsrfPreventionFilter.java&p1=tomcat/trunk/java/org/apache/catalina/filters/RestCsrfPreventionFilter.java&r1=1709120&r2=1711114&rev=1711114&view=diff
==============================================================================
--- tomcat/trunk/java/org/apache/catalina/filters/RestCsrfPreventionFilter.java
(original)
+++
tomcat/tc8.0.x/trunk/java/org/apache/catalina/filters/RestCsrfPreventionFilter.java
Wed Oct 28 20:03:42 2015
@@ -18,7 +18,6 @@ package org.apache.catalina.filters;
import java.io.IOException;
import java.util.Objects;
-import java.util.function.Predicate;
import java.util.regex.Pattern;
import javax.servlet.FilterChain;
@@ -80,18 +79,17 @@ public class RestCsrfPreventionFilter ex
NON_MODIFYING_METHOD, MODIFYING_METHOD
}
- private static final Pattern NON_MODIFYING_METHODS_PATTERN =
Pattern.compile("GET|HEAD|OPTIONS");
- private static final Predicate<String> nonModifyingMethods = m -> m !=
null &&
- NON_MODIFYING_METHODS_PATTERN.matcher(m).matches();
+ private static final Pattern NON_MODIFYING_METHODS_PATTERN = Pattern
+ .compile("GET|HEAD|OPTIONS");
@Override
public void doFilter(ServletRequest request, ServletResponse response,
FilterChain chain)
throws IOException, ServletException {
- if (request instanceof HttpServletRequest &&
- response instanceof HttpServletResponse) {
+ if (request instanceof HttpServletRequest && response instanceof
HttpServletResponse) {
MethodType mType = MethodType.MODIFYING_METHOD;
- if (nonModifyingMethods.test(((HttpServletRequest)
request).getMethod())) {
+ String method = ((HttpServletRequest) request).getMethod();
+ if (method != null &&
NON_MODIFYING_METHODS_PATTERN.matcher(method).matches()) {
mType = MethodType.NON_MODIFYING_METHOD;
}
@@ -112,30 +110,41 @@ public class RestCsrfPreventionFilter ex
chain.doFilter(request, response);
}
- private static interface RestCsrfPreventionStrategy {
- static final NonceSupplier<HttpServletRequest> nonceFromRequest = (r,
k) -> r.getHeader(k);
- static final NonceSupplier<HttpSession> nonceFromSession = (s, k) ->
Objects.isNull(s) ? null
- : (String) s.getAttribute(k);
-
- static final NonceConsumer<HttpServletResponse> nonceToResponse = (r,
k, v) -> r.setHeader(
- k, v);
- static final NonceConsumer<HttpSession> nonceToSession = (s, k, v) ->
s.setAttribute(k, v);
+ private static abstract class RestCsrfPreventionStrategy {
- boolean apply(HttpServletRequest request, HttpServletResponse
response) throws IOException;
+ abstract boolean apply(HttpServletRequest request, HttpServletResponse
response)
+ throws IOException;
+
+ protected String extractNonceFromRequest(HttpServletRequest request,
String key) {
+ return request.getHeader(key);
+ }
+
+ protected void storeNonceToResponse(HttpServletResponse response,
String key, String value) {
+ response.setHeader(key, value);
+ }
+
+ protected String extractNonceFromSession(HttpSession session, String
key) {
+ return session == null ? null : (String) session.getAttribute(key);
+ }
+
+ protected void storeNonceToSession(HttpSession session, String key,
Object value) {
+ session.setAttribute(key, value);
+ }
}
- private class StateChangingRequest implements RestCsrfPreventionStrategy {
+ private class StateChangingRequest extends RestCsrfPreventionStrategy {
@Override
public boolean apply(HttpServletRequest request, HttpServletResponse
response)
throws IOException {
if (isValidStateChangingRequest(
- nonceFromRequest.getNonce(request,
Constants.CSRF_REST_NONCE_HEADER_NAME),
- nonceFromSession.getNonce(request.getSession(false),
Constants.CSRF_REST_NONCE_SESSION_ATTR_NAME))) {
+ extractNonceFromRequest(request,
Constants.CSRF_REST_NONCE_HEADER_NAME),
+ extractNonceFromSession(request.getSession(false),
+ Constants.CSRF_REST_NONCE_SESSION_ATTR_NAME))) {
return true;
}
- nonceToResponse.setNonce(response,
Constants.CSRF_REST_NONCE_HEADER_NAME,
+ storeNonceToResponse(response,
Constants.CSRF_REST_NONCE_HEADER_NAME,
Constants.CSRF_REST_NONCE_HEADER_REQUIRED_VALUE);
response.sendError(getDenyStatus(),
sm.getString("restCsrfPreventionFilter.invalidNonce"));
@@ -143,41 +152,30 @@ public class RestCsrfPreventionFilter ex
}
private boolean isValidStateChangingRequest(String reqNonce, String
sessionNonce) {
- return Objects.nonNull(reqNonce) && Objects.nonNull(sessionNonce)
+ return reqNonce != null && sessionNonce != null
&& Objects.equals(reqNonce, sessionNonce);
}
}
- private class FetchRequest implements RestCsrfPreventionStrategy {
- private final Predicate<String> fetchRequest = s ->
Constants.CSRF_REST_NONCE_HEADER_FETCH_VALUE
- .equalsIgnoreCase(s);
+ private class FetchRequest extends RestCsrfPreventionStrategy {
@Override
public boolean apply(HttpServletRequest request, HttpServletResponse
response) {
- if (fetchRequest.test(
- nonceFromRequest.getNonce(request,
Constants.CSRF_REST_NONCE_HEADER_NAME))) {
- String nonceFromSessionStr =
nonceFromSession.getNonce(request.getSession(false),
+ if (Constants.CSRF_REST_NONCE_HEADER_FETCH_VALUE
+ .equalsIgnoreCase(extractNonceFromRequest(request,
+ Constants.CSRF_REST_NONCE_HEADER_NAME))) {
+ String nonceFromSessionStr =
extractNonceFromSession(request.getSession(false),
Constants.CSRF_REST_NONCE_SESSION_ATTR_NAME);
if (nonceFromSessionStr == null) {
nonceFromSessionStr = generateNonce();
-
nonceToSession.setNonce(Objects.requireNonNull(request.getSession(true)),
+
storeNonceToSession(Objects.requireNonNull(request.getSession(true)),
Constants.CSRF_REST_NONCE_SESSION_ATTR_NAME,
nonceFromSessionStr);
}
- nonceToResponse.setNonce(response,
Constants.CSRF_REST_NONCE_HEADER_NAME,
+ storeNonceToResponse(response,
Constants.CSRF_REST_NONCE_HEADER_NAME,
nonceFromSessionStr);
}
return true;
}
}
-
- @FunctionalInterface
- private static interface NonceSupplier<T> {
- String getNonce(T supplier, String key);
- }
-
- @FunctionalInterface
- private static interface NonceConsumer<T> {
- void setNonce(T consumer, String key, String value);
- }
}
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