Cannot set up certs for trusted CAs exception ( JCE and tomcat and cocoon2.0)

[SUBRAHMANYAM,VEENA (HP-MountainView,ex1)]

Hi

I have been experiencing some problems using JCE, in the tomcat environment.

I am using tomcat 3.2.2, and JCE 1.2.1., xerces_1_4_1.jar, cocoon 2.0 ...

I am using JCE to encrypt and decrypt some XML docs. The program to encrypt
and decrypt works in standalone mode. But when it is run within the servlet
env, an "java.lang.SecurityException: Cannot set up certs for trusted CAs"
exception is thrown at the the following lines of code: 
 Cipher cipherDes = Cipher.getInstance("DES/ECB/PKCS5Padding");
 secretKeyDesKey = KeyGenerator.getInstance("DES").generateKey();

(the detailed stack trace is pasted at the bottom of this email)

I have found that this exception has been reported to be thrown, by various
people, in the tomcat archives, due to classloader hierarchy problems,
JarURLConnection / WARConnection clashes etc.
I have found emails that allude to a fix, if some set of these jars are
placed in the tomcat-home/lib dir instead of the
tomcat-home/webapps/cocoon/web-inf/lib dir, but have not been able to locate
further info....(my JCE 1.2.1 related jars, xerces.jar, etc are all in the
tomcat-home/webapps/cocoon/web-inf/lib directory).

I think this, or a flavor of this problem is a known bug in tomcat...

Can someone, give me a workaround or a fix or a guestimate for the
resolution?

Thanx in advance..

Veena

P.s:
 The exception I get is as follows: 
------------------------------------------------------------
2001-08-29 07:09:13 - Ctx( /cocoon ): Exception in: R( /cocoon + /request1 +
null) - java.lang.ExceptionInInitializerError: java.lang.SecurityException:
Cannot set up certs for trusted CAs
        at javax.crypto.b.<clinit>([DashoPro-V1.2-120198])
        at javax.crypto.Cipher.getInstance([DashoPro-V1.2-120198])
        at
org.apache.cocoon.transformation.XmlEncryptor.encryptElement(XMLEncryptionTr
ansformer.java:453)
        at
org.apache.cocoon.transformation.XmlEncryptor.encryptChildNodes(XMLEncryptio
nTransformer.java:335)
        at
org.apache.cocoon.transformation.XmlEncryptor.encrypt(XMLEncryptionTransform
er.java:295)
        at
org.apache.cocoon.transformation.XMLEncryptionTransformer.endElement(XMLEncr
yptionTransformer.java:154)
        at
org.apache.xerces.parsers.SAXParser.endElement(SAXParser.java:1403)
        at
org.apache.xerces.validators.common.XMLValidator.callEndElement(XMLValidator
.java:1385)
        at
org.apache.xerces.framework.XMLDocumentScanner$ContentDispatcher.dispatch(XM
LDocumentScanner.java:1205)
        at
org.apache.xerces.framework.XMLDocumentScanner.parseSome(XMLDocumentScanner.
java:381)
        at org.apache.xerces.framework.XMLParser.parse(XMLParser.java:952)
        at
org.apache.cocoon.components.parser.JaxpParser.parse(JaxpParser.java:72)
        at
org.apache.cocoon.generation.StreamGenerator.generate(StreamGenerator.java:1
09)......

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