/// <summary>
/// Creates a signed CDA package zip file.
/// </summary>
/// <param name="package">The CDAPackageBase instance used to generate the zip file content.</param>
/// <param name="signingCert">The certificate used to sign the CDA root document.</param>
/// <returns>A byte array of the zip file content.</returns>
public static byte[] Create(CDAPackage package, X509Certificate2 signingCert)
{
// Validation on package
Validation.ValidateArgumentRequired("package", package);
// Validate CDAPackage
CDAPackageValidation.ValidateCDAPackage(package, signingCert != null);
var ms = new MemoryStream();
// Generate signature if package operation is ADD or REPLACE
byte[] signatureContent = null;
if (signingCert != null)
{
signatureContent = CreateSignature(package, signingCert);
package.CDASignature = new CDAPackageFile();
package.CDASignature.CDAPackageFileType = CDAPackageFile.FileType.Signature;
package.CDASignature.FileContent = signatureContent;
package.CDASignature.FileName = "CDA_SIGN.XML";
}
using (var zip = new ZipFile(Encoding.Default))
{
// Add folder entries
zip.AddEntry("IHE_XDM/", "");
zip.AddEntry("IHE_XDM/SUBSET01/", "");
zip.AddEntry("IHE_XDM/SUBSET01/" + package.CDADocumentRoot.FileName, package.CDADocumentRoot.FileContent);
// Add signature if present
if (signatureContent != null)
{
zip.AddEntry("IHE_XDM/SUBSET01/" + package.CDASignature.FileName, signatureContent);
}
if (package.CDADocumentAttachments != null)
{
foreach (var file in package.CDADocumentAttachments)
{
zip.AddEntry("IHE_XDM/SUBSET01/" + file.FileName, file.FileContent);
}
}
// Save output file
zip.Save(ms);
}
var zipContent = ms.ToArray();
ms.Close();
return(zipContent);
}
/// <summary>
/// Extracts a CDA package zip file and verifies the signature. An exception is thrown if verification fails.
/// </summary>
/// <param name="package">A byte array of a CDA package zip file.</param>
/// <param name="verifyCertificate">An optional delegate to verify the signature certificate (NULL accepted).</param>
/// <returns>A CDAPackage instance constructed from the CDA package zip file.</returns>
public static CDAPackage Extract(byte[] package, VerifyCertificateDelegate verifyCertificate)
{
// Validation on package
Validation.ValidateArgumentRequired("package", package);
var newPackage = ExtractAndIgnoreSignatureVerification(package);
if (newPackage.CDASignature != null)
{
VerifySignature(newPackage, verifyCertificate);
}
CDAPackageValidation.ValidateCDAPackage(newPackage, newPackage.SigningTime.HasValue);
return(newPackage);
}
