public static string IpcfEncryptFile(
string inputFile,
string templateId,
EncryptFlags flags,
bool suppressUI,
bool offline,
bool hasUserConsent,
IntPtr parentWindow,
SymmetricKeyCredential symmKey = null,
string outputDirectory = null,
WaitHandle cancelCurrentOperation = null)
{
int hr = 0;
IntPtr encryptedFileName = IntPtr.Zero;
string outputFileName = null;
SafeIpcPromptContext ipcContext =
SafeNativeMethods.CreateIpcPromptContext(suppressUI,
offline,
hasUserConsent,
parentWindow,
symmKey,
cancelCurrentOperation);
IntPtr licenseInfoPtr = Marshal.StringToHGlobalUni(templateId);
try
{
using (var wrappedContext = ipcContext.Wrap())
{
hr = UnsafeFileApiMethods.IpcfEncryptFile(
inputFile,
licenseInfoPtr,
(uint)EncryptLicenseInfoTypes.IPCF_EF_TEMPLATE_ID,
(uint)flags,
(IpcPromptContext)wrappedContext,
outputDirectory,
out encryptedFileName);
}
SafeNativeMethods.ThrowOnErrorCode(hr);
outputFileName = Marshal.PtrToStringUni(encryptedFileName);
if (null == outputFileName || 0 == outputFileName.Length)
{
outputFileName = inputFile;
}
}
finally
{
Marshal.FreeHGlobal(licenseInfoPtr);
UnsafeFileApiMethods.IpcFreeMemory(encryptedFileName);
SafeNativeMethods.ReleaseIpcPromptContext(ipcContext);
}
return(outputFileName);
}
public static string IpcfEncryptFile(
string inputFile,
SafeInformationProtectionLicenseHandle licenseHandle,
EncryptFlags flags,
bool suppressUI,
bool offline,
bool hasUserConsent,
System.Windows.Forms.Form parentForm,
SymmetricKeyCredential symmKey,
string outputDirectory = null)
{
int hr = 0;
IntPtr encryptedFileName = IntPtr.Zero;
string outputFileName = null;
SafeIpcPromptContext ipcContext =
SafeNativeMethods.CreateIpcPromptContext(suppressUI,
offline,
hasUserConsent,
parentForm,
symmKey);
try
{
hr = UnsafeFileApiMethods.IpcfEncryptFile(
inputFile,
licenseHandle.Value,
(uint)EncryptLicenseInfoTypes.IPCF_EF_LICENSE_HANDLE,
(uint)flags,
(IpcPromptContext)ipcContext,
outputDirectory,
out encryptedFileName);
SafeNativeMethods.ThrowOnErrorCode(hr);
outputFileName = Marshal.PtrToStringUni(encryptedFileName);
if (null == outputFileName || 0 == outputFileName.Length)
{
outputFileName = inputFile;
}
}
finally
{
UnsafeFileApiMethods.IpcFreeMemory(encryptedFileName);
SafeNativeMethods.ReleaseIpcPromptContext(ipcContext);
}
return(outputFileName);
}