diff --git a/programs/nstool/source/AesCtrWrappedIFile.cpp b/programs/nstool/source/AesCtrWrappedIFile.cpp
index 79d966f..134ded9 100644
--- a/programs/nstool/source/AesCtrWrappedIFile.cpp
+++ b/programs/nstool/source/AesCtrWrappedIFile.cpp
@@ -1,6 +1,7 @@
 #include "AesCtrWrappedIFile.h"
 
 AesCtrWrappedIFile::AesCtrWrappedIFile(fnd::IFile* file, const crypto::aes::sAes128Key& key, const crypto::aes::sAesIvCtr& ctr) :
+	mOwnIFile(false),
 	mFile(file),
 	mKey(key),
 	mBaseCtr(ctr)
@@ -8,6 +9,23 @@ AesCtrWrappedIFile::AesCtrWrappedIFile(fnd::IFile* file, const crypto::aes::sAes
 	mScratch.alloc(kAesCtrScratchAllocSize);
 }
 
+AesCtrWrappedIFile::AesCtrWrappedIFile(fnd::IFile* file, bool ownIfile, const crypto::aes::sAes128Key& key, const crypto::aes::sAesIvCtr& ctr) :
+	mOwnIFile(ownIfile),
+	mFile(file),
+	mKey(key),
+	mBaseCtr(ctr)
+{
+	mScratch.alloc(kAesCtrScratchAllocSize);
+}
+
+AesCtrWrappedIFile::~AesCtrWrappedIFile()
+{
+	if (mOwnIFile)
+	{
+		delete mFile;
+	}
+}
+
 size_t AesCtrWrappedIFile::size()
 {
 	return mFile->size();
diff --git a/programs/nstool/source/AesCtrWrappedIFile.h b/programs/nstool/source/AesCtrWrappedIFile.h
index f2a001c..3eaaaad 100644
--- a/programs/nstool/source/AesCtrWrappedIFile.h
+++ b/programs/nstool/source/AesCtrWrappedIFile.h
@@ -6,6 +6,8 @@ class AesCtrWrappedIFile : public fnd::IFile
 {
 public:
 	AesCtrWrappedIFile(fnd::IFile* file, const crypto::aes::sAes128Key& key, const crypto::aes::sAesIvCtr& ctr);
+	AesCtrWrappedIFile(fnd::IFile* file, bool ownIfile, const crypto::aes::sAes128Key& key, const crypto::aes::sAesIvCtr& ctr);
+	~AesCtrWrappedIFile();
 
 	size_t size();
 	void seek(size_t offset);
@@ -18,6 +20,7 @@ private:
 	static const size_t kAesCtrScratchSize = 0x1000000;
 	static const size_t kAesCtrScratchAllocSize = kAesCtrScratchSize + crypto::aes::kAesBlockSize;
 
+	bool mOwnIFile;
 	fnd::IFile* mFile;
 	crypto::aes::sAes128Key mKey;
 	crypto::aes::sAesIvCtr mBaseCtr, mCurrentCtr;
diff --git a/programs/nstool/source/OffsetAdjustedIFile.cpp b/programs/nstool/source/OffsetAdjustedIFile.cpp
index e9f7231..d2fb0cf 100644
--- a/programs/nstool/source/OffsetAdjustedIFile.cpp
+++ b/programs/nstool/source/OffsetAdjustedIFile.cpp
@@ -1,6 +1,7 @@
 #include "OffsetAdjustedIFile.h"
 
 OffsetAdjustedIFile::OffsetAdjustedIFile(fnd::IFile* file, size_t offset, size_t size) :
+	mOwnIFile(false),
 	mFile(file),
 	mBaseOffset(offset),
 	mCurrentOffset(0),
@@ -9,6 +10,24 @@ OffsetAdjustedIFile::OffsetAdjustedIFile(fnd::IFile* file, size_t offset, size_t
 
 }
 
+OffsetAdjustedIFile::OffsetAdjustedIFile(fnd::IFile* file, bool ownIFile, size_t offset, size_t size) :
+	mOwnIFile(ownIFile),
+	mFile(file),
+	mBaseOffset(offset),
+	mCurrentOffset(0),
+	mSize(size)
+{
+
+}
+
+OffsetAdjustedIFile::~OffsetAdjustedIFile()
+{
+	if (mOwnIFile)
+	{
+		delete mFile;
+	}
+}
+
 size_t OffsetAdjustedIFile::size()
 {
 	return mSize;
diff --git a/programs/nstool/source/OffsetAdjustedIFile.h b/programs/nstool/source/OffsetAdjustedIFile.h
index 5b60dcf..b1c1e09 100644
--- a/programs/nstool/source/OffsetAdjustedIFile.h
+++ b/programs/nstool/source/OffsetAdjustedIFile.h
@@ -4,6 +4,8 @@ class OffsetAdjustedIFile : public fnd::IFile
 {
 public:
 	OffsetAdjustedIFile(fnd::IFile* file, size_t offset, size_t size);
+	OffsetAdjustedIFile(fnd::IFile* file, bool ownIFile, size_t offset, size_t size);
+	~OffsetAdjustedIFile();
 
 	size_t size();
 	void seek(size_t offset);
@@ -12,6 +14,7 @@ public:
 	void write(const byte_t* out, size_t len);
 	void write(const byte_t* out, size_t offset, size_t len);
 private:
+	bool mOwnIFile;
 	fnd::IFile* mFile;
 	size_t mBaseOffset, mCurrentOffset;
 	size_t mSize;