v.add(new DERObjectIdentifier(ID_CONTENT_TYPE));
v.add(new DERSet(new DERObjectIdentifier(ID_PKCS7_DATA)));
attribute.add(new DERSequence(v));
v = new ASN1EncodableVector();
v.add(new DERObjectIdentifier(ID_SIGNING_TIME));
v.add(new DERSet(new DERUTCTime(signingTime.getTime())));
attribute.add(new DERSequence(v));
v = new ASN1EncodableVector();
v.add(new DERObjectIdentifier(ID_MESSAGE_DIGEST));
v.add(new DERSet(new DEROctetString(secondDigest)));
attribute.add(new DERSequence(v));