OpenSAML user discussion

[Mike Klein <>]

Doing marshalling first yields error regarding null signature algorithm.
Am I perhaps creating signature incorrectly?

I am on an older main/latest...from like 3 mos back.

Caused by: org.apache.xml.security.signature.XMLSignatureException: The
requested algorithm null does not exist. Original Message was: null
Original Exception was java.lang.NullPointerException
    at
org.apache.xml.security.algorithms.SignatureAlgorithm.<init>(Unknown Source)
    at org.apache.xml.security.signature.SignedInfo.<init>(Unknown Source)
    at org.apache.xml.security.signature.XMLSignature.<init>(Unknown Source)
    at org.apache.xml.security.signature.XMLSignature.<init>(Unknown Source)
    at
org.opensaml.xml.signature.impl.SignatureMarshaller.createSignatureElement(SignatureMarshaller.java:113)
    ... 57 more


mike

Brent Putman wrote:
> That's an "expected" error.  You need to marshall the object to be
> signed before you call Signer.signObject(sig).  So in your case your
> need to first marshall the response, after you call
> response.setSignature(sig).
>
> That process is documented here:
>
> https://spaces.internet2.edu/display/SHIB/OSTwoUserManJavaDSIG
>
> --Brent
>
>
>
> Mike Klein wrote:
>   
>>     public static Response signResponse(Response response)
>>     {
>>         try
>>         {
>>             SignatureBuilder builder = new SignatureBuilder();
>>             SignatureImpl sig = builder.buildObject();
>>             SAMLObjectContentReference socr = new
>> SAMLObjectContentReference(response);
>>             sig.getContentReferences().add(socr);
>>             sig.setSigningKey(signingKey);
>>             response.setSignature(sig);
>>             Signer.signObject(sig);
>>              ...
>>
>> However on last statement I am getting following:
>>
>> 2007-05-12 18:18:32,693 WARN  [Signer] Unable to compute signature,
>> Signature XMLObject does not have the XMLSignature created during
>> marshalling.
>> 1225078 [http-0.0.0.0-8080-Processor2] WARN
>> org.opensaml.xml.signature.Signer  - Unable to compute signature,
>> Signature XMLObject does not have the XMLSignature created during
>> marshalling.
>> 2007-05-12 18:18:32,850 ERROR [SignatureMarshaller] Unable to construct
>> signature Element {http://www.w3.org/2000/09/xmldsig#}Signature
>> org.apache.xml.security.signature.XMLSignatureException: The requested
>> algorithm null does not exist. Original Message was: null
>> Original Exception was java.lang.NullPointerException
>>     at
>> org.apache.xml.security.algorithms.SignatureAlgorithm.<init>(Unknown 
>> Source)
>>   
>>