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authorThomas Lenz <thomas.lenz@egiz.gv.at>2017-06-23 11:58:29 +0200
committerThomas Lenz <thomas.lenz@egiz.gv.at>2017-06-23 11:58:29 +0200
commitbbe653345bbb5dad2ed2356df6f817dd7de26528 (patch)
tree1dfb88505f1871e2816513676a03b58db2e00046 /bkucommon/src
parent0603c0fbdfe028113431c65590b6e7e28929f6f6 (diff)
downloadmocca-bbe653345bbb5dad2ed2356df6f817dd7de26528.tar.gz
mocca-bbe653345bbb5dad2ed2356df6f817dd7de26528.tar.bz2
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fix another possible XXE, SSRF problem.
INFO: DocTypes are disabled by default for all XML content that should be signed with mocca!!! Consequently, XML and XAdES signatures for XML documents that contains a DocType declaration is not possible any more. If DocType declarations are absolutely necessary than this feature can be skipped by set the Java System-Property "-Degiz.mocca.xades.xml.allow.doctype=true"
Diffstat (limited to 'bkucommon/src')
-rw-r--r--bkucommon/src/main/java/at/gv/egiz/bku/slcommands/impl/xsect/Signature.java10
-rw-r--r--bkucommon/src/test/java/at/gv/egiz/bku/slcommands/impl/xsect/SignatureTest.java52
-rw-r--r--bkucommon/src/test/resources/at/gv/egiz/bku/slcommands/impl/SignatureInfo_Base64_4.xml13
3 files changed, 73 insertions, 2 deletions
diff --git a/bkucommon/src/main/java/at/gv/egiz/bku/slcommands/impl/xsect/Signature.java b/bkucommon/src/main/java/at/gv/egiz/bku/slcommands/impl/xsect/Signature.java
index c838b24b..c3c2f14c 100644
--- a/bkucommon/src/main/java/at/gv/egiz/bku/slcommands/impl/xsect/Signature.java
+++ b/bkucommon/src/main/java/at/gv/egiz/bku/slcommands/impl/xsect/Signature.java
@@ -73,6 +73,7 @@ import org.w3c.dom.ls.LSException;
import org.w3c.dom.ls.LSInput;
import org.w3c.dom.ls.LSOutput;
import org.w3c.dom.ls.LSParser;
+import org.w3c.dom.ls.LSParserFilter;
import org.w3c.dom.ls.LSResourceResolver;
import org.w3c.dom.ls.LSSerializer;
@@ -104,6 +105,8 @@ import at.gv.egiz.xades.QualifyingPropertiesFactory;
public class Signature {
public static final String XMLDSIG_PREFIX = "dsig";
+ public static final String SYSTEM_PROPERTY_ALLOW_DOCTYPES = "egiz.mocca.xades.xml.allow.doctype";
+
/**
* Logging facility.
*/
@@ -899,7 +902,12 @@ public class Signature {
LSResourceResolverAdapter resourceResolver = new LSResourceResolverAdapter(supplements);
domConfig.setParameter("resource-resolver", resourceResolver);
domConfig.setParameter("validate", Boolean.TRUE);
-
+
+ //Disallow DocTypes per default
+ String docTypeFlagString = System.getProperty(SYSTEM_PROPERTY_ALLOW_DOCTYPES, String.valueOf(Boolean.FALSE));
+ boolean docTypeFlag = Boolean.parseBoolean(docTypeFlagString.toLowerCase());
+ domConfig.setParameter("disallow-doctype", !docTypeFlag);
+
Document doc;
try {
doc = parser.parse(input);
diff --git a/bkucommon/src/test/java/at/gv/egiz/bku/slcommands/impl/xsect/SignatureTest.java b/bkucommon/src/test/java/at/gv/egiz/bku/slcommands/impl/xsect/SignatureTest.java
index 23fdfc17..6e5612f6 100644
--- a/bkucommon/src/test/java/at/gv/egiz/bku/slcommands/impl/xsect/SignatureTest.java
+++ b/bkucommon/src/test/java/at/gv/egiz/bku/slcommands/impl/xsect/SignatureTest.java
@@ -317,13 +317,54 @@ public class SignatureTest {
}
@Test
+ public void testSetSignature_Base64_WITH_DISALLOWED_DOCTYPE_And_SystemParameter() throws JAXBException, SLCommandException, XMLStreamException {
+
+ SignatureInfoCreationType signatureInfo = unmarshalSignatureInfo("SignatureInfo_Base64_2.xml");
+
+ Signature signature = new Signature(urlDereferencer, new IdValueFactoryImpl(), null, false);
+
+ //allow DocTypes to perform this test
+ System.setProperty(Signature.SYSTEM_PROPERTY_ALLOW_DOCTYPES, String.valueOf(Boolean.FALSE));
+ try {
+ signature.setSignatureInfo(signatureInfo);
+ assertTrue("Check_ALLOW_DOCTYPES_System_Property", false);
+
+ } catch (SLCommandException e) {
+ assertTrue("Check_ALLOW_DOCTYPES_System_Property", true);
+
+ }
+ }
+
+ @Test
+ public void testSetSignature_Base64_WITH_DISALLOWED_DOCTYPE_WithOut_SystemParameter() throws JAXBException, SLCommandException, XMLStreamException {
+
+ SignatureInfoCreationType signatureInfo = unmarshalSignatureInfo("SignatureInfo_Base64_2.xml");
+
+ Signature signature = new Signature(urlDereferencer, new IdValueFactoryImpl(), null, false);
+
+ //allow DocTypes to perform this test
+ System.clearProperty(Signature.SYSTEM_PROPERTY_ALLOW_DOCTYPES);
+ try {
+ signature.setSignatureInfo(signatureInfo);
+ assertTrue("Check_ALLOW_DOCTYPES_WithOut_System_Property", false);
+
+ } catch (SLCommandException e) {
+ assertTrue("Check_ALLOW_DOCTYPES_WithOut_System_Property", true);
+
+ }
+ }
+
+ @Test
public void testSetSignature_Base64_2() throws JAXBException, SLCommandException, XMLStreamException {
SignatureInfoCreationType signatureInfo = unmarshalSignatureInfo("SignatureInfo_Base64_2.xml");
Signature signature = new Signature(urlDereferencer, new IdValueFactoryImpl(), null, false);
+ //allow DocTypes to perform this test
+ System.setProperty(Signature.SYSTEM_PROPERTY_ALLOW_DOCTYPES, String.valueOf(Boolean.TRUE));
signature.setSignatureInfo(signatureInfo);
+ System.setProperty(Signature.SYSTEM_PROPERTY_ALLOW_DOCTYPES, String.valueOf(Boolean.FALSE));
Node parent = signature.getParent();
Node nextSibling = signature.getNextSibling();
@@ -343,7 +384,10 @@ public class SignatureTest {
Signature signature = new Signature(urlDereferencer, new IdValueFactoryImpl(), null, true);
+ //allow DocTypes to perform this test
+ System.setProperty(Signature.SYSTEM_PROPERTY_ALLOW_DOCTYPES, String.valueOf(Boolean.TRUE));
signature.setSignatureInfo(signatureInfo);
+ System.setProperty(Signature.SYSTEM_PROPERTY_ALLOW_DOCTYPES, String.valueOf(Boolean.FALSE));
Node parent = signature.getParent();
Node nextSibling = signature.getNextSibling();
@@ -363,7 +407,10 @@ public class SignatureTest {
Signature signature = new Signature(urlDereferencer, new IdValueFactoryImpl(), null, false);
+ //allow DocTypes to perform this test
+ System.setProperty(Signature.SYSTEM_PROPERTY_ALLOW_DOCTYPES, String.valueOf(Boolean.TRUE));
signature.setSignatureInfo(signatureInfo);
+ System.setProperty(Signature.SYSTEM_PROPERTY_ALLOW_DOCTYPES, String.valueOf(Boolean.FALSE));
Node parent = signature.getParent();
Node nextSibling = signature.getNextSibling();
@@ -383,7 +430,10 @@ public class SignatureTest {
Signature signature = new Signature(urlDereferencer, new IdValueFactoryImpl(), null, true);
- signature.setSignatureInfo(signatureInfo);
+ //allow DocTypes to perform this test
+ System.setProperty(Signature.SYSTEM_PROPERTY_ALLOW_DOCTYPES, String.valueOf(Boolean.TRUE));
+ signature.setSignatureInfo(signatureInfo);
+ System.setProperty(Signature.SYSTEM_PROPERTY_ALLOW_DOCTYPES, String.valueOf(Boolean.FALSE));
Node parent = signature.getParent();
Node nextSibling = signature.getNextSibling();
diff --git a/bkucommon/src/test/resources/at/gv/egiz/bku/slcommands/impl/SignatureInfo_Base64_4.xml b/bkucommon/src/test/resources/at/gv/egiz/bku/slcommands/impl/SignatureInfo_Base64_4.xml
new file mode 100644
index 00000000..d7950f1e
--- /dev/null
+++ b/bkucommon/src/test/resources/at/gv/egiz/bku/slcommands/impl/SignatureInfo_Base64_4.xml
@@ -0,0 +1,13 @@
+<sl:CreateXMLSignatureRequest xmlns:sl="http://www.buergerkarte.at/namespaces/securitylayer/1.2#" xmlns:dsig="http://www.w3.org/2000/09/xmldsig#">
+ <sl:SignatureInfo>
+ <sl:SignatureEnvironment>
+ <sl:Base64Content>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</sl:Base64Content>
+ </sl:SignatureEnvironment>
+ <sl:SignatureLocation xmlns:doc="urn:document" Index="1">/XMLDocument</sl:SignatureLocation>
+ <sl:Supplement>
+ <sl:Content Reference="urn:Document.dtd">
+ <sl:LocRefContent>testlocal:Document.dtd</sl:LocRefContent>
+ </sl:Content>
+ </sl:Supplement>
+ </sl:SignatureInfo>
+</sl:CreateXMLSignatureRequest> \ No newline at end of file