/// <summary>
/// Create signature properties from existing document
/// </summary>
/// <param name="element"></param>
/// <param name="nsm"></param>
internal XadesSignatureProperties(XmlElement element, XmlNamespaceManager nsm)
{
// read from xml
XmlElement signedSignatureProperties = element["SignedSignatureProperties", Xades.XadesNamespaceUrl];
// signing time
if (DateTime.TryParse(signedSignatureProperties?["SigningTime", Xades.XadesNamespaceUrl]?.InnerText, out DateTime signingTime))
{
SigningTime = signingTime;
}
// signing certificate; currently only one certificate supported
//foreach (XmlElement cert in element.SelectNodes("xades:SignedSignatureProperties/xades:SigningCertificate/xades:Cert", nsm))
//{
// TODO: read certificate information and expose as public read-only array
//}
// signature policy
XmlElement signaturePolicyIdentifier = signedSignatureProperties["SignaturePolicyIdentifier", Xades.XadesNamespaceUrl];
XmlElement signaturePolicyImplied = signaturePolicyIdentifier?["SignaturePolicyImplied", Xades.XadesNamespaceUrl];
XmlElement signaturePolicyId = signaturePolicyIdentifier?["SignaturePolicyId", Xades.XadesNamespaceUrl];
if (signaturePolicyImplied != null)
{
PolicyImplied = true;
}
else if (signaturePolicyId != null)
{
PolicyId = ObjectIdentifier.TryParseFromParent(signaturePolicyId, "SigPolicyId", Xades.XadesNamespaceUrl);
XmlElement transformChain = signaturePolicyId.SelectSingleNode("ds:Transforms", nsm) as XmlElement;
if (transformChain != null)
{
PolicyTransformChain = new TransformChain();
MethodInfo loadXmlInfo = typeof(TransformChain).GetMethod("LoadXml", BindingFlags.NonPublic | BindingFlags.Instance);
loadXmlInfo.Invoke(PolicyTransformChain, new object[] { transformChain });
}
DigestAlgAndValue digestInfo = DigestAlgAndValue.TryParse(signaturePolicyId["SigPolicyHash", Xades.XadesNamespaceUrl]);
PolicyDigestMethod = digestInfo.Algorithm;
PolicyDigest = digestInfo.Digest;
XmlElement signaturePolicyQualifiers = signaturePolicyIdentifier["SigPolicyQualifiers", Xades.XadesNamespaceUrl];
if (signaturePolicyQualifiers != null)
{
PolicyURIs = signaturePolicyQualifiers.SelectNodes("xades:SigPolicyQualifier/xades:SPURI", nsm).OfType <XmlElement>().Select(x => x.InnerText).ToList();
//PolicyNotices = signaturePolicyQualifiers.SelectNodes("xades:SigPolicyQualifier/xades:SPUserNotice", nsm).OfType<XmlElement>().Select(x => new PolicyUserNotice(x)).ToList();
}
}
}
