private void CounterSign(CmsSigner signer)
{
CspParameters parameters = new CspParameters();
if (!X509Utils.GetPrivateKeyInfo(X509Utils.GetCertContext(signer.Certificate), ref parameters))
{
throw new CryptographicException(Marshal.GetLastWin32Error());
}
KeyContainerPermission containerPermission = new KeyContainerPermission(KeyContainerPermissionFlags.NoFlags);
KeyContainerPermissionAccessEntry accessEntry = new KeyContainerPermissionAccessEntry(parameters, KeyContainerPermissionFlags.Open | KeyContainerPermissionFlags.Sign);
containerPermission.AccessEntries.Add(accessEntry);
containerPermission.Demand();
uint dwIndex = (uint)PkcsUtils.GetSignerIndex(this.m_signedCms.GetCryptMsgHandle(), this, 0);
SafeLocalAllocHandle localAllocHandle = CAPI.LocalAlloc(64U, new IntPtr(Marshal.SizeOf(typeof(CAPI.CMSG_SIGNER_ENCODE_INFO))));
CAPI.CMSG_SIGNER_ENCODE_INFO signerEncodeInfo = PkcsUtils.CreateSignerEncodeInfo(signer);
try
{
Marshal.StructureToPtr((object)signerEncodeInfo, localAllocHandle.DangerousGetHandle(), false);
if (!CAPI.CryptMsgCountersign(this.m_signedCms.GetCryptMsgHandle(), dwIndex, 1U, localAllocHandle.DangerousGetHandle()))
{
throw new CryptographicException(Marshal.GetLastWin32Error());
}
this.m_signedCms.ReopenToDecode();
}
finally
{
Marshal.DestroyStructure(localAllocHandle.DangerousGetHandle(), typeof(CAPI.CMSG_SIGNER_ENCODE_INFO));
localAllocHandle.Dispose();
signerEncodeInfo.Dispose();
}
int num = (int)PkcsUtils.AddCertsToMessage(this.m_signedCms.GetCryptMsgHandle(), this.m_signedCms.Certificates, PkcsUtils.CreateBagOfCertificates(signer));
}
public void ComputeSignature(CmsSigner signer, bool silent)
{
if (signer == null)
{
throw new ArgumentNullException("signer");
}
if (this.ContentInfo.Content.Length == 0)
{
throw new CryptographicException(SecurityResources.GetResourceString("Cryptography_Cms_Sign_Empty_Content"));
}
if (SubjectIdentifierType.NoSignature == signer.SignerIdentifierType)
{
if (this.m_safeCryptMsgHandle != null && !this.m_safeCryptMsgHandle.IsInvalid)
{
throw new CryptographicException(SecurityResources.GetResourceString("Cryptography_Cms_Sign_No_Signature_First_Signer"));
}
this.Sign(signer, silent);
}
else
{
if (signer.Certificate == null)
{
if (silent)
{
throw new InvalidOperationException(SecurityResources.GetResourceString("Cryptography_Cms_RecipientCertificateNotFound"));
}
signer.Certificate = PkcsUtils.SelectSignerCertificate();
}
if (!signer.Certificate.HasPrivateKey)
{
throw new CryptographicException(-2146893811);
}
CspParameters parameters = new CspParameters();
if (!X509Utils.GetPrivateKeyInfo(X509Utils.GetCertContext(signer.Certificate), ref parameters))
{
throw new CryptographicException(SignedCms.SafeGetLastWin32Error());
}
KeyContainerPermission containerPermission = new KeyContainerPermission(KeyContainerPermissionFlags.NoFlags);
KeyContainerPermissionAccessEntry accessEntry = new KeyContainerPermissionAccessEntry(parameters, KeyContainerPermissionFlags.Open | KeyContainerPermissionFlags.Sign);
containerPermission.AccessEntries.Add(accessEntry);
containerPermission.Demand();
if (this.m_safeCryptMsgHandle == null || this.m_safeCryptMsgHandle.IsInvalid)
{
this.Sign(signer, silent);
}
else
{
this.CoSign(signer, silent);
}
}
}
