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 IpcfDecryptFile(
string inputFile,
DecryptFlags flags,
bool suppressUI,
bool offline,
bool hasUserConsent,
IntPtr parentWindow,
SymmetricKeyCredential symmKey,
string outputDirectory = null,
WaitHandle cancelCurrentOperation = null)
{
int hr = 0;
IntPtr decryptedFileNamePtr = IntPtr.Zero;
string decryptedFileName = null;
SafeIpcPromptContext ipcContext =
SafeNativeMethods.CreateIpcPromptContext(suppressUI,
offline,
hasUserConsent,
parentWindow,
symmKey,
cancelCurrentOperation);
try
{
using (var wrappedContext = ipcContext.Wrap())
{
hr = UnsafeFileApiMethods.IpcfDecryptFile(
inputFile,
(uint)flags,
(IpcPromptContext)wrappedContext,
outputDirectory,
out decryptedFileNamePtr);
}
SafeNativeMethods.ThrowOnErrorCode(hr);
decryptedFileName = Marshal.PtrToStringUni(decryptedFileNamePtr);
if (null == decryptedFileName || 0 == decryptedFileName.Length)
{
decryptedFileName = inputFile;
}
}
finally
{
UnsafeFileApiMethods.IpcFreeMemory(decryptedFileNamePtr);
SafeNativeMethods.ReleaseIpcPromptContext(ipcContext);
}
return(decryptedFileName);
}
public static string IpcfEncryptFileStream(
Stream inputStream,
string inputFilePath,
string templateId,
EncryptFlags flags,
ref Stream outputStream,
SafeIpcPromptContext ipcContext = null)
{
int hr = 0;
IntPtr encryptedFileName = IntPtr.Zero;
string outputFileName = null;
ILockBytes ilInputStream = new ILockBytesOverStream(inputStream);
ILockBytes ilOutputStream = new ILockBytesOverStream(outputStream);
IntPtr licenseInfoPtr = Marshal.StringToHGlobalUni(templateId);
if (null == ipcContext) //use the default
{
ipcContext = SafeNativeMethods.CreateIpcPromptContext(false, false, false, IntPtr.Zero);
}
try
{
using (var wrappedContext = ipcContext.Wrap())
{
hr = UnsafeFileApiMethods.IpcfEncryptFileStream(
ilInputStream,
inputFilePath,
licenseInfoPtr,
(uint)EncryptLicenseInfoTypes.IPCF_EF_TEMPLATE_ID,
(uint)flags,
(IpcPromptContext)wrappedContext,
ilOutputStream,
out encryptedFileName);
}
SafeNativeMethods.ThrowOnErrorCode(hr);
outputFileName = Marshal.PtrToStringUni(encryptedFileName);
if (null == outputFileName || 0 == outputFileName.Length)
{
outputFileName = inputFilePath;
}
}
finally
{
Marshal.FreeHGlobal(licenseInfoPtr);
UnsafeFileApiMethods.IpcFreeMemory(encryptedFileName);
}
return(outputFileName);
}
public static string IpcfEncryptFileStream(
Stream inputStream,
string inputFilePath,
SafeInformationProtectionLicenseHandle licenseHandle,
EncryptFlags flags,
ref Stream outputStream,
SafeIpcPromptContext ipcContext = null)
{
int hr = 0;
IntPtr encryptedFileName = IntPtr.Zero;
string outputFileName = null;
ILockBytes ilInputStream = new ILockBytesOverStream(inputStream);
ILockBytes ilOutputStream = new ILockBytesOverStream(outputStream);
if (null == ipcContext) //use the default
{
ipcContext = SafeNativeMethods.CreateIpcPromptContext(false, false, false, IntPtr.Zero);
}
try
{
using (var wrappedContext = ipcContext.Wrap())
{
hr = UnsafeFileApiMethods.IpcfEncryptFileStream(
ilInputStream,
inputFilePath,
licenseHandle.Value,
(uint)EncryptLicenseInfoTypes.IPCF_EF_LICENSE_HANDLE,
(uint)flags,
(IpcPromptContext)wrappedContext,
ilOutputStream,
out encryptedFileName);
}
SafeNativeMethods.ThrowOnErrorCode(hr);
outputFileName = Marshal.PtrToStringUni(encryptedFileName);
if (null == outputFileName || 0 == outputFileName.Length)
{
outputFileName = inputFilePath;
}
}
finally
{
UnsafeFileApiMethods.IpcFreeMemory(encryptedFileName);
}
return(outputFileName);
}
public static SafeInformationProtectionFileHandle IpcfOpenFileOnStream(
Stream inputStream,
EncryptFlags flags,
SafeIpcPromptContext ipcContext)
{
int hr = 0;
ILockBytes ilInputStream = new ILockBytesOverStream(inputStream);
SafeInformationProtectionFileHandle fileHandle;
using (var wrappedContext = ipcContext.Wrap())
{
hr = UnsafeFileApiMethods.IpcfOpenFileOnILockBytes(ilInputStream, (IpcPromptContext)wrappedContext,
(uint)flags, out fileHandle);
SafeNativeMethods.ThrowOnErrorCode(hr);
return(fileHandle);
}
}
public static string IpcfDecryptFileStream(
Stream inputStream,
string inputFilePath,
DecryptFlags flags,
ref Stream outputStream,
SafeIpcPromptContext ipcContext = null)
{
int hr = 0;
IntPtr decryptedFileNamePtr = IntPtr.Zero;
string decryptedFileName = null;
ILockBytes ilInputStream = new ILockBytesOverStream(inputStream);
ILockBytes ilOutputStream = new ILockBytesOverStream(outputStream);
if (null == ipcContext) //use the default
{
ipcContext = SafeNativeMethods.CreateIpcPromptContext(false, false, false, IntPtr.Zero);
}
try
{
using (var wrappedContext = ipcContext.Wrap())
{
hr = UnsafeFileApiMethods.IpcfDecryptFileStream(
ilInputStream,
inputFilePath,
(uint)flags,
(IpcPromptContext)wrappedContext,
ilOutputStream,
out decryptedFileNamePtr);
}
SafeNativeMethods.ThrowOnErrorCode(hr);
decryptedFileName = Marshal.PtrToStringUni(decryptedFileNamePtr);
if (null == decryptedFileName || 0 == decryptedFileName.Length)
{
decryptedFileName = inputFilePath;
}
}
finally
{
UnsafeFileApiMethods.IpcFreeMemory(decryptedFileNamePtr);
}
return(decryptedFileName);
}
