/// <summary>
/// Verifies the end <see cref="Certificate"/> according to the SSL policy rules.
/// </summary>
/// <param name="server">The server that returned the certificate -or- a null reference if the certificate is a client certificate.</param>
/// <param name="type">One of the <see cref="AuthType"/> values.</param>
/// <param name="flags">One or more of the <see cref="VerificationFlags"/> values. VerificationFlags values can be combined with the OR operator.</param>
/// <returns>One of the <see cref="CertificateStatus"/> values.</returns>
/// <exception cref="CertificateException">An error occurs while verifying the certificate.</exception>
public virtual CertificateStatus VerifyChain(string server, AuthType type, VerificationFlags flags)
{
// Convert the server string to a wide string memory pointer
IntPtr serverName = IntPtr.Zero;
IntPtr dataPtr = IntPtr.Zero;
try {
if (server == null)
{
serverName = IntPtr.Zero;
}
else
{
serverName = Marshal.StringToHGlobalUni(server);
}
// create a HTTPSPolicyCallbackData and get a memory pointer to the structure
SslPolicyParameters data = new SslPolicyParameters();
data.cbSize = Marshal.SizeOf(typeof(SslPolicyParameters));
data.dwAuthType = (int)type;
data.pwszServerName = serverName;
data.fdwChecks = (int)flags;
dataPtr = Marshal.AllocHGlobal(data.cbSize);
Marshal.StructureToPtr(data, dataPtr, false);
// create a CERT_CHAIN_POLICY_PARA
ChainPolicyParameters para = new ChainPolicyParameters();
para.cbSize = Marshal.SizeOf(typeof(ChainPolicyParameters));
para.dwFlags = (int)flags;
para.pvExtraPolicyPara = dataPtr;
// create a CERT_CHAIN_POLICY_STATUS
ChainPolicyStatus status = new ChainPolicyStatus();
status.cbSize = Marshal.SizeOf(typeof(ChainPolicyStatus));
// verify the certificate
if (SspiProvider.CertVerifyCertificateChainPolicy(new IntPtr(SecurityConstants.CERT_CHAIN_POLICY_SSL), m_Handle, ref para, ref status) == 0)
{
throw new CertificateException("Unable to verify the certificate.");
}
if (Enum.IsDefined(typeof(CertificateStatus), status.dwError))
{
return((CertificateStatus)status.dwError);
}
else
{
return(CertificateStatus.OtherError);
}
} finally {
// clean up
if (dataPtr != IntPtr.Zero)
{
Marshal.FreeHGlobal(dataPtr);
}
if (serverName != IntPtr.Zero)
{
Marshal.FreeHGlobal(serverName);
}
}
}
/// <summary>
/// Verifies the end <see cref="Certificate"/> according to the SSL policy rules.
/// </summary>
/// <param name="server">The server that returned the certificate -or- a null reference if the certificate is a client certificate.</param>
/// <param name="type">One of the <see cref="AuthType"/> values.</param>
/// <param name="flags">One or more of the <see cref="VerificationFlags"/> values. VerificationFlags values can be combined with the OR operator.</param>
/// <returns>One of the <see cref="CertificateStatus"/> values.</returns>
/// <exception cref="CertificateException">An error occurs while verifying the certificate.</exception>
public virtual CertificateStatus VerifyChain(string server, AuthType type, VerificationFlags flags) {
// Convert the server string to a wide string memory pointer
IntPtr serverName = IntPtr.Zero;
IntPtr dataPtr = IntPtr.Zero;
try {
if (server == null) {
serverName = IntPtr.Zero;
} else {
serverName = Marshal.StringToHGlobalUni(server);
}
// create a HTTPSPolicyCallbackData and get a memory pointer to the structure
SslPolicyParameters data = new SslPolicyParameters();
data.cbSize = Marshal.SizeOf(typeof(SslPolicyParameters));
data.dwAuthType = (int)type;
data.pwszServerName = serverName;
data.fdwChecks = (int)flags;
dataPtr = Marshal.AllocHGlobal(data.cbSize);
Marshal.StructureToPtr(data, dataPtr, false);
// create a CERT_CHAIN_POLICY_PARA
ChainPolicyParameters para = new ChainPolicyParameters();
para.cbSize = Marshal.SizeOf(typeof(ChainPolicyParameters));
para.dwFlags = (int)flags;
para.pvExtraPolicyPara = dataPtr;
// create a CERT_CHAIN_POLICY_STATUS
ChainPolicyStatus status = new ChainPolicyStatus();
status.cbSize = Marshal.SizeOf(typeof(ChainPolicyStatus));
// verify the certificate
if (SspiProvider.CertVerifyCertificateChainPolicy(new IntPtr(SecurityConstants.CERT_CHAIN_POLICY_SSL), m_Handle, ref para, ref status) == 0)
throw new CertificateException("Unable to verify the certificate.");
if (Enum.IsDefined(typeof(CertificateStatus), status.dwError))
return (CertificateStatus)status.dwError;
else
return CertificateStatus.OtherError;
} finally {
// clean up
if (dataPtr != IntPtr.Zero)
Marshal.FreeHGlobal(dataPtr);
if (serverName != IntPtr.Zero)
Marshal.FreeHGlobal(serverName);
}
}
