public static SecPkgInfo[] GetSSPackages()
{
int count;
IntPtr packages;
int result = Win32.EnumerateSecurityPackages(out count, out packages);
if (result != 0)
{
Win32.Throw(result);
}
var alloc = new MemoryRegion(packages);
try
{
SecPkgInfo[] array = new SecPkgInfo[count];
for (int i = 0; i < count; i++)
{
array[i] = alloc.ReadStruct <SecPkgInfo>(0, SecPkgInfo.SizeOf, i);
}
return(array);
}
finally
{
Win32.FreeContextBuffer(packages);
}
}
private AuthenticationPackage(SecPkgInfo pkg)
{
Capabilities = pkg.fCapabilities;
Version = pkg.wVersion;
RpcId = pkg.wRPCID;
MaxTokenSize = pkg.cbMaxToken;
Name = pkg.Name;
Comment = pkg.Comment;
}
internal AuthenticationPackage(IntPtr pkg_ptr)
{
SecPkgInfo pkg = (SecPkgInfo)Marshal.PtrToStructure(pkg_ptr, typeof(SecPkgInfo));
Capabilities = pkg.fCapabilities;
Version = pkg.wVersion;
RpcId = pkg.wRPCID;
MaxTokenSize = pkg.cbMaxToken;
Name = pkg.Name;
Comment = pkg.Comment;
}
/// <summary>
/// Get authentication packages.
/// </summary>
/// <returns>The list of authentication packages.</returns>
public static IEnumerable <AuthenticationPackage> Get()
{
List <AuthenticationPackage> packages = new List <AuthenticationPackage>();
if (SecurityNativeMethods.EnumerateSecurityPackages(out int count,
out IntPtr ppPackageInfo) == SecStatusCode.Success)
{
try {
int size = Marshal.SizeOf(typeof(SecPkgInfo));
for (int i = 0; i < count; ++i)
{
SecPkgInfo pkg = (SecPkgInfo)Marshal.PtrToStructure(ppPackageInfo + i * size, typeof(SecPkgInfo));
packages.Add(new AuthenticationPackage(pkg));
}
} finally {
SecurityNativeMethods.FreeContextBuffer(ppPackageInfo);
}
}
return(packages.AsReadOnly());
}
private void GetMaxTokenSize()
{
int num;
SafeContextBufferHandle safeContextBufferHandle;
if (Sspi.EnumerateSecurityPackages(out num, out safeContextBufferHandle) != SecurityStatus.SEC_E_OK)
{
throw new Win32Exception("Failed to EnumerateSecurityPackages");
}
for (int i = 0; i < num; i++)
{
SecPkgInfo item = safeContextBufferHandle.GetItem <SecPkgInfo>(i);
if (string.Compare(item.GetName(), "Schannel", true) == 0)
{
this.maxTokenSize = item.cbMaxToken;
break;
}
}
if (this.maxTokenSize == 0)
{
throw new Exception("Failed to retrive cbMaxToken for Schannel");
}
}
public static List <string> GetAvailableProvidersList()
{
List <string> configuredProviders = new List <string>();
List <string> availableProvidersList = new List <string>();
try {
const int SEC_E_OK = 0;
const int SECPKG_FLAG_NEGOTIABLE2 = 0x00200000;
const int SECPKG_FLAG_NEGOTIABLE = 0x00000800;
IntPtr pcPackages = (IntPtr)1;
IntPtr secPkgInfoPtr;
int retValue = EnumerateSecuirtyPackagesW(out pcPackages, out secPkgInfoPtr);
if (retValue != SEC_E_OK)
{
if (secPkgInfoPtr != null)
{
retValue = FreeContextBuffer(secPkgInfoPtr);
if (retValue != SEC_E_OK)
{
// Failed to release memory
}
}
return(null);
}
int nego2FlagIntValue = (int)SECPKG_FLAG_NEGOTIABLE2;
int negoFlagIntValue = (int)SECPKG_FLAG_NEGOTIABLE;
IntPtr currentPtrToStruct = secPkgInfoPtr;
for (int i = 0; i < (int)pcPackages; ++i)
{
SecPkgInfo currentPackageStruct = (SecPkgInfo)Marshal.PtrToStructure <SecPkgInfo>(currentPtrToStruct);
// Ignore NegoExtender package (because NegoExtender is a psuedo authentication protocol)
// and show 'pku2u' because it proven that it works over HTTP
if ((currentPackageStruct.Name).Equals("NegoExtender", StringComparison.OrdinalIgnoreCase))
{
// Go to the next available struct
currentPtrToStruct = (IntPtr)((Int64)currentPtrToStruct + Marshal.SizeOf <SecPkgInfo>());
continue;
}
if (((currentPackageStruct.fCapabilities & nego2FlagIntValue) == 0) && ((currentPackageStruct.fCapabilities & negoFlagIntValue) == 0))
{
currentPtrToStruct = (IntPtr)((Int64)currentPtrToStruct + Marshal.SizeOf <SecPkgInfo>());
continue;
}
string strPackageName = null;
// 1. If this is a Negotiable2 package, prefix package name with 'Negotiate:'
// 2. If this is a Negotiable package and it's name is not 'Negotiate' and 'NTLM' , then add prefix 'Negotiate:' to the pacakge name
// IMPORTANT NOTE: Runtime sends Nego2 package when one of the enabled provider is prefixed with 'Negotiate:' (which is considered as Nego2 package)
// Just to be consistent with the runtime behavior we will display a warning message for all the Negotiate packages which are prefixed with 'Negotiate:'
if (((currentPackageStruct.fCapabilities & nego2FlagIntValue) != 0) ||
((currentPackageStruct.fCapabilities & negoFlagIntValue) != 0 &&
!(currentPackageStruct.Name).Equals("Negotiate", StringComparison.OrdinalIgnoreCase) &&
!(currentPackageStruct.Name).Equals("NTLM", StringComparison.OrdinalIgnoreCase)
)
)
{
strPackageName = "Negotiate:";
}
strPackageName += currentPackageStruct.Name;
// Add it to the available providers list
availableProvidersList.Add(strPackageName);
// Go to the next available struct
currentPtrToStruct = (IntPtr)((Int64)currentPtrToStruct + Marshal.SizeOf <SecPkgInfo>());
}
// Free the memory
retValue = FreeContextBuffer(secPkgInfoPtr);
if (retValue != SEC_E_OK)
{
// Failed to release the memory...
}
}
catch (Exception) { }
return(availableProvidersList);
}
