public static bool IpcfIsFileEncrypted(string inputFile)
{
uint fileStatus;
int hr = UnsafeFileApiMethods.IpcfIsFileEncrypted(inputFile, out fileStatus);
SafeNativeMethods.ThrowOnErrorCode(hr);
return((FileEncryptedStatus)fileStatus != FileEncryptedStatus.IPCF_FILE_STATUS_DECRYPTED);
}
public static string IpcfEncryptFile(
string inputFile,
string templateId,
EncryptFlags flags,
bool suppressUI,
bool offline,
bool hasUserConsent,
System.Windows.Forms.Form parentForm,
string outputDirectory = null)
{
int hr = 0;
IntPtr encryptedFileName = IntPtr.Zero;
string outputFileName = null;
IpcPromptContext ipcContext =
SafeNativeMethods.CreateIpcPromptContext(suppressUI,
offline,
hasUserConsent,
parentForm);
IntPtr licenseInfoPtr = Marshal.StringToHGlobalUni(templateId);
try
{
hr = UnsafeFileApiMethods.IpcfEncryptFile(
inputFile,
licenseInfoPtr,
(uint)EncryptLicenseInfoTypes.IPCF_EF_TEMPLATE_ID,
(uint)flags,
ipcContext,
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);
}
return(outputFileName);
}
public static string IpcfEncryptFile(
string inputFile,
SafeInformationProtectionLicenseHandle licenseHandle,
EncryptFlags flags,
bool suppressUI,
bool offline,
bool hasUserConsent,
System.Windows.Forms.Form parentForm,
string outputDirectory = null)
{
int hr = 0;
IntPtr encryptedFileName = IntPtr.Zero;
string outputFileName = null;
IpcPromptContext ipcContext =
SafeNativeMethods.CreateIpcPromptContext(suppressUI,
offline,
hasUserConsent,
parentForm);
try
{
hr = UnsafeFileApiMethods.IpcfEncryptFile(
inputFile,
licenseHandle.Value,
(uint)EncryptLicenseInfoTypes.IPCF_EF_LICENSE_HANDLE,
(uint)flags,
ipcContext,
outputDirectory,
out encryptedFileName);
SafeNativeMethods.ThrowOnErrorCode(hr);
outputFileName = Marshal.PtrToStringUni(encryptedFileName);
if (null == outputFileName || 0 == outputFileName.Length)
{
outputFileName = inputFile;
}
}
finally
{
UnsafeFileApiMethods.IpcFreeMemory(encryptedFileName);
}
return(outputFileName);
}
public static string IpcfDecryptFile(
string inputFile,
DecryptFlags flags,
bool suppressUI,
bool offline,
bool hasUserConsent,
System.Windows.Forms.Form parentForm,
string outputDirectory = null)
{
int hr = 0;
IntPtr decryptedFileNamePtr = IntPtr.Zero;
string decryptedFileName = null;
IpcPromptContext ipcContext =
SafeNativeMethods.CreateIpcPromptContext(suppressUI,
offline,
hasUserConsent,
parentForm);
try
{
hr = UnsafeFileApiMethods.IpcfDecryptFile(
inputFile,
(uint)flags,
ipcContext,
outputDirectory,
out decryptedFileNamePtr);
SafeNativeMethods.ThrowOnErrorCode(hr);
decryptedFileName = Marshal.PtrToStringUni(decryptedFileNamePtr);
if (null == decryptedFileName || 0 == decryptedFileName.Length)
{
decryptedFileName = inputFile;
}
}
finally
{
UnsafeFileApiMethods.IpcFreeMemory(decryptedFileNamePtr);
}
return(decryptedFileName);
}
public static byte[] IpcfGetSerializedLicenseFromFile(string inputFile)
{
byte[] license = null;
int hr = 0;
IntPtr licensePtr = IntPtr.Zero;
try
{
hr = UnsafeFileApiMethods.IpcfGetSerializedLicenseFromFile(
inputFile,
out licensePtr);
SafeNativeMethods.ThrowOnErrorCode(hr);
license = SafeNativeMethods.MarshalIpcBufferToManaged(licensePtr);
}
finally
{
UnsafeFileApiMethods.IpcFreeMemory(licensePtr);
}
return(license);
}
