public Signature createRawSignature(AlgorithmIdentifier algorithm) {
Signature sig;
try {
String algName = getSignatureName(algorithm);
algName = "NONE" + algName.substring(algName.indexOf("WITH"));
sig = helper.createSignature(algName);
// RFC 4056
// When the id-RSASSA-PSS algorithm identifier is used for a signature,
// the AlgorithmIdentifier parameters field MUST contain RSASSA-PSS-params.
/*
Can;t do this pre-jdk1.4
if (algorithm.getAlgorithm().equals(PKCSObjectIdentifiers.id_RSASSA_PSS))
{
AlgorithmParameters params = helper.createAlgorithmParameters(algName);
params.init(algorithm.getParameters().toASN1Primitive().getEncoded(), "ASN.1");
PSSParameterSpec spec = (PSSParameterSpec)params.getParameterSpec(PSSParameterSpec.class);
sig.setParameter(spec);
}
*/
} catch (Exception e) {
return null;
}
return sig;
}
Signature createSignature(AlgorithmIdentifier sigAlgId) throws GeneralSecurityException {
Signature sig;
try {
sig = helper.createSignature(getSignatureName(sigAlgId));
} catch (NoSuchAlgorithmException e) {
//
// try an alternate
//
if (oids.get(sigAlgId.getAlgorithm()) != null) {
String signatureAlgorithm = (String) oids.get(sigAlgId.getAlgorithm());
sig = helper.createSignature(signatureAlgorithm);
} else {
throw e;
}
}
return sig;
}