/// <summary>
/// Подписывание данных
/// </summary>
/// <param name="content">Содержимое</param>
/// <param name="certificateContent">Содержимое сертификата</param>
/// <returns>Подпись</returns>
public byte[] Sign(byte[] content, byte[] certificateContent)
{
var certificate = CertificateWithPrivateKeyFinder.GetCertificateWithPrivateKey(certificateContent);
var certificatesHandle = GCHandle.Alloc(new[] { certificate }, GCHandleType.Pinned);
try
{
return(Sign(content, certificate, certificatesHandle));
}
finally
{
certificatesHandle.Free();
Api.CertFreeCertificateContext(certificate);
}
}
public ExtendedWinApiCrypt(byte[] certificateContent)
{
certificate = CertificateWithPrivateKeyFinder.GetCertificateWithPrivateKey(certificateContent);
certificatesHandle = GCHandle.Alloc(new[] { certificate }, GCHandleType.Pinned);
}
/// <summary>
/// Подписывание данных
/// </summary>
/// <param name="content">Содержимое</param>
/// <param name="certificateContent">Содержимое сертификата</param>
/// <returns>Подпись</returns>
public byte[] Sign(byte[] content, byte[] certificateContent)
{
IntPtr certificate = CertificateWithPrivateKeyFinder.GetCertificateWithPrivateKey(certificateContent);
GCHandle certificatesHandle = GCHandle.Alloc(new[] { certificate }, GCHandleType.Pinned);
GCHandle contentHandle = GCHandle.Alloc(content, GCHandleType.Pinned);
{
try
{
var signParameters = new Api.CRYPT_SIGN_MESSAGE_PARA();
signParameters.size = Marshal.SizeOf(signParameters);
signParameters.encoding = Api.ENCODING;
signParameters.signerCertificate = certificate;
signParameters.hashAlgorithm.objectIdAnsiString = Api.OID_GOST_34_11_94;
signParameters.certificatesCount = 1;
signParameters.certificates = certificatesHandle.AddrOfPinnedObject();
Api.CRYPT_SIGN_MESSAGE_PARA localSignParameters = signParameters;
Int32 signatureSize = 0;
if (!Api.CryptSignMessage(ref localSignParameters, true, 1, new[] { contentHandle.AddrOfPinnedObject() }, new[] { content.Length }, IntPtr.Zero, ref signatureSize))
{
throw new Win32Exception();
}
int bufferLength = signatureSize + 1024;
while (true)
{
var buffer = new byte[bufferLength];
int bytesWritten = bufferLength;
GCHandle signatureHandle = GCHandle.Alloc(buffer, GCHandleType.Pinned);
try
{
if (!Api.CryptSignMessage(ref signParameters, true, 1, new[] { contentHandle.AddrOfPinnedObject() }, new[] { content.Length }, signatureHandle.AddrOfPinnedObject(), ref bufferLength))
{
throw new Win32Exception();
}
Array.Resize(ref buffer, bytesWritten);
return(buffer);
}
catch (Exception exception)
{
var win32Exception = exception.InnerException as Win32Exception;
if (win32Exception != null && win32Exception.NativeErrorCode == 234)
{
bufferLength *= 2;
}
else
{
throw;
}
}
finally
{
signatureHandle.Free();
}
}
}
finally
{
certificatesHandle.Free();
contentHandle.Free();
Api.CertFreeCertificateContext(certificate);
}
}
}
