references.add(signFactory.newReference("",sha1DigestMethod,transforms,null,null));
for (EbMSDataSource dataSource : dataSources)
references.add(signFactory.newReference("cid:" + dataSource.getContentId(),sha1DigestMethod,Collections.emptyList(),null,null,DigestUtils.sha(IOUtils.toByteArray(dataSource.getInputStream()))));
SignedInfo signedInfo = signFactory.newSignedInfo(signFactory.newCanonicalizationMethod(CanonicalizationMethod.INCLUSIVE,(C14NMethodParameterSpec)null),signFactory.newSignatureMethod(SignatureMethod.RSA_SHA1,null),references);
List<XMLStructure> keyInfoElements = new ArrayList<XMLStructure>();
KeyInfoFactory keyInfoFactory = signFactory.getKeyInfoFactory();
keyInfoElements.add(keyInfoFactory.newKeyValue(keyPair.getPublic()));