public static SignedData GetInstance(object obj)
{
if (obj == null)
{
return(null);
}
SignedData signedData = obj as SignedData;
if (signedData != null)
{
return(signedData);
}
return(new SignedData(Asn1Sequence.GetInstance(obj)));
}
public static SignedData GetInstance(object obj)
{
if (obj == null)
{
return(null);
}
SignedData existing = obj as SignedData;
if (existing != null)
{
return(existing);
}
return(new SignedData(Asn1Sequence.GetInstance(obj)));
}
/// <summary>
/// Write myself to the given stream
/// </summary>
public void WriteTo(Stream stream, out string md5FingerPrint, out string sha1FingerPrint)
{
X509Certificate[] cert;
AsymmetricKeyEntry privateKey;
LoadPfx(out cert, out privateKey);
var certsVector = new Asn1EncodableVector();
md5FingerPrint = null;
sha1FingerPrint = null;
foreach (var c in cert)
{
var certStream = new MemoryStream(c.GetEncoded());
var certStruct = X509CertificateStructure.GetInstance(new Asn1InputStream(certStream).ReadObject());
certsVector.Add(certStruct);
if (md5FingerPrint == null)
{
var certData = certStream.ToArray();
md5FingerPrint = CreateFingerprint(new MD5Digest(), certData);
}
if (sha1FingerPrint == null)
{
var certData = certStream.ToArray();
sha1FingerPrint = CreateFingerprint(new Sha1Digest(), certData);
}
}
var encryptedSignature = GetSignature(signature, privateKey.Key);
var signerInfo = new SignerInfo(
new DerInteger(1),
new IssuerAndSerialNumber(cert[0].IssuerDN, cert[0].SerialNumber),
new AlgorithmIdentifier(Oids.SHA1, DerNull.Instance),
null,
new AlgorithmIdentifier(Oids.RSA, DerNull.Instance),
new DerOctetString(encryptedSignature),
null);
var pkcs7 = new SignedData(
new DerInteger(1),
new DerSet(new AlgorithmIdentifier(Oids.SHA1, DerNull.Instance)),
new ContentInfo(new DerObjectIdentifier(Oids.data), null),
new DerSet(certsVector),
null,
new DerSet(signerInfo));
//var signedData = new ContentInfo(new DERObjectIdentifier(Oids.signedData), pkcs7);
var v = new Asn1EncodableVector();
v.Add(new DerObjectIdentifier(Oids.signedData));
v.Add(new DerTaggedObject(0, pkcs7));
var signedData = new DerSequence(v);
// Save
var data = signedData.GetEncoded();
stream.Write(data, 0, data.Length);
}
