private void CounterSign(CmsSigner signer)
{
CspParameters parameters = new CspParameters();
if (!System.Security.Cryptography.X509Certificates.X509Utils.GetPrivateKeyInfo(System.Security.Cryptography.X509Certificates.X509Utils.GetCertContext(signer.Certificate), ref parameters))
{
throw new CryptographicException(Marshal.GetLastWin32Error());
}
KeyContainerPermission permission = new KeyContainerPermission(KeyContainerPermissionFlags.NoFlags);
KeyContainerPermissionAccessEntry accessEntry = new KeyContainerPermissionAccessEntry(parameters, KeyContainerPermissionFlags.Sign | KeyContainerPermissionFlags.Open);
permission.AccessEntries.Add(accessEntry);
permission.Demand();
uint dwIndex = (uint)PkcsUtils.GetSignerIndex(this.m_signedCms.GetCryptMsgHandle(), this, 0);
System.Security.Cryptography.SafeLocalAllocHandle handle = System.Security.Cryptography.CAPI.LocalAlloc(0x40, new IntPtr(Marshal.SizeOf(typeof(System.Security.Cryptography.CAPI.CMSG_SIGNER_ENCODE_INFO))));
System.Security.Cryptography.CAPI.CMSG_SIGNER_ENCODE_INFO structure = PkcsUtils.CreateSignerEncodeInfo(signer);
try
{
Marshal.StructureToPtr(structure, handle.DangerousGetHandle(), false);
if (!System.Security.Cryptography.CAPI.CryptMsgCountersign(this.m_signedCms.GetCryptMsgHandle(), dwIndex, 1, handle.DangerousGetHandle()))
{
throw new CryptographicException(Marshal.GetLastWin32Error());
}
this.m_signedCms.ReopenToDecode();
}
finally
{
Marshal.DestroyStructure(handle.DangerousGetHandle(), typeof(System.Security.Cryptography.CAPI.CMSG_SIGNER_ENCODE_INFO));
handle.Dispose();
structure.Dispose();
}
PkcsUtils.AddCertsToMessage(this.m_signedCms.GetCryptMsgHandle(), this.m_signedCms.Certificates, PkcsUtils.CreateBagOfCertificates(signer));
}
private unsafe void Sign(CmsSigner signer, bool silent)
{
System.Security.Cryptography.SafeCryptMsgHandle hCryptMsg = null;
System.Security.Cryptography.CAPI.CMSG_SIGNED_ENCODE_INFO cmsg_signed_encode_info = new System.Security.Cryptography.CAPI.CMSG_SIGNED_ENCODE_INFO(Marshal.SizeOf(typeof(System.Security.Cryptography.CAPI.CMSG_SIGNED_ENCODE_INFO)));
System.Security.Cryptography.CAPI.CMSG_SIGNER_ENCODE_INFO structure = PkcsUtils.CreateSignerEncodeInfo(signer, silent);
byte[] encodedMessage = null;
try
{
System.Security.Cryptography.SafeLocalAllocHandle handle2 = System.Security.Cryptography.CAPI.LocalAlloc(0, new IntPtr(Marshal.SizeOf(typeof(System.Security.Cryptography.CAPI.CMSG_SIGNER_ENCODE_INFO))));
try
{
Marshal.StructureToPtr(structure, handle2.DangerousGetHandle(), false);
X509Certificate2Collection certificates = PkcsUtils.CreateBagOfCertificates(signer);
System.Security.Cryptography.SafeLocalAllocHandle handle3 = PkcsUtils.CreateEncodedCertBlob(certificates);
cmsg_signed_encode_info.cSigners = 1;
cmsg_signed_encode_info.rgSigners = handle2.DangerousGetHandle();
cmsg_signed_encode_info.cCertEncoded = (uint)certificates.Count;
if (certificates.Count > 0)
{
cmsg_signed_encode_info.rgCertEncoded = handle3.DangerousGetHandle();
}
if (string.Compare(this.ContentInfo.ContentType.Value, "1.2.840.113549.1.7.1", StringComparison.OrdinalIgnoreCase) == 0)
{
hCryptMsg = System.Security.Cryptography.CAPI.CryptMsgOpenToEncode(0x10001, this.Detached ? 4 : 0, 2, new IntPtr((void *)&cmsg_signed_encode_info), IntPtr.Zero, IntPtr.Zero);
}
else
{
hCryptMsg = System.Security.Cryptography.CAPI.CryptMsgOpenToEncode(0x10001, this.Detached ? 4 : 0, 2, new IntPtr((void *)&cmsg_signed_encode_info), this.ContentInfo.ContentType.Value, IntPtr.Zero);
}
if ((hCryptMsg == null) || hCryptMsg.IsInvalid)
{
throw new CryptographicException(Marshal.GetLastWin32Error());
}
if ((this.ContentInfo.Content.Length > 0) && !System.Security.Cryptography.CAPI.CAPISafe.CryptMsgUpdate(hCryptMsg, this.ContentInfo.pContent, (uint)this.ContentInfo.Content.Length, true))
{
throw new CryptographicException(Marshal.GetLastWin32Error());
}
encodedMessage = PkcsUtils.GetContent(hCryptMsg);
hCryptMsg.Dispose();
handle3.Dispose();
}
finally
{
Marshal.DestroyStructure(handle2.DangerousGetHandle(), typeof(System.Security.Cryptography.CAPI.CMSG_SIGNER_ENCODE_INFO));
handle2.Dispose();
}
}
finally
{
structure.Dispose();
}
hCryptMsg = OpenToDecode(encodedMessage, this.ContentInfo, this.Detached);
if ((this.m_safeCryptMsgHandle != null) && !this.m_safeCryptMsgHandle.IsInvalid)
{
this.m_safeCryptMsgHandle.Dispose();
}
this.m_safeCryptMsgHandle = hCryptMsg;
GC.KeepAlive(signer);
}