/**
* Return a signer information object with the passed in unsigned
* attributes replacing the ones that are current associated with
* the object passed in.
*
* @param signerInformation the signerInfo to be used as the basis.
* @param unsignedAttributes the unsigned attributes to add.
* @return a copy of the original SignerInformationObject with the changed attributes.
*/
public static SignerInformation ReplaceUnsignedAttributes(
SignerInformation signerInformation,
Asn1.Cms.AttributeTable unsignedAttributes)
{
SignerInfo sInfo = signerInformation.info;
Asn1Set unsignedAttr = null;
if (unsignedAttributes != null)
{
unsignedAttr = new DerSet(unsignedAttributes.ToAsn1EncodableVector());
}
return(new SignerInformation(
new SignerInfo(
sInfo.SignerID,
sInfo.DigestAlgorithm,
sInfo.AuthenticatedAttributes,
sInfo.DigestEncryptionAlgorithm,
sInfo.EncryptedDigest,
unsignedAttr),
signerInformation.contentType,
signerInformation.content,
null));
}
internal virtual void AddSignerCallback(
SignerInformation si)
{
}
/**
* generate a set of one or more SignerInformation objects representing counter signatures on
* the passed in SignerInformation object.
*
* @param signer the signer to be countersigned
* @param sigProvider the provider to be used for counter signing.
* @return a store containing the signers.
*/
public SignerInformationStore GenerateCounterSigners(
SignerInformation signer)
{
return(this.Generate(null, new CmsProcessableByteArray(signer.GetSignature()), false).GetSignerInfos());
}