[nx] Add ISerialiseableInterface, which AciHeader and NcaHeader inherit from. Also added SacEntry.

lib/nx/AciHeader.cpp

@@ -19,20 +19,45 @@ void AciHeader::calculateSectionOffsets()
 	mKc.offset = mSac.offset + align(mSac.size, kAciAlignSize);
 }
 
+AciHeader::AciHeader()
+{
+	clearVariables();
+}
+
+AciHeader::AciHeader(const AciHeader & other)
+{
+	importBinary(other.getBytes(), other.getSize());
+}
+
+AciHeader::AciHeader(const u8 * bytes)
+{
+	importBinary(bytes);
+}
+
+bool AciHeader::operator==(const AciHeader & other)
+{
+	return memcmp(this->getBytes(), other.getBytes(), this->getSize());
+}
+
+void AciHeader::operator=(const AciHeader & other)
+{
+	this->importBinary(other.getBytes(), other.getSize());
+}
+
 const u8 * AciHeader::getBytes() const
 {
-	return mBinaryBlob.data();
+	return mBinaryBlob.getBytes();
 }
 
 size_t AciHeader::getSize() const
 {
-	return mBinaryBlob.size();
+	return mBinaryBlob.getSize();
 }
 
 void AciHeader::exportBinary()
 {
 	mBinaryBlob.alloc(sizeof(sAciHeader));
-	sAciHeader* hdr = (sAciHeader*)mBinaryBlob.data();
+	sAciHeader* hdr = (sAciHeader*)mBinaryBlob.getBytes();
 
 	// set type
 	switch (mType)
@@ -65,9 +90,9 @@ void AciHeader::importBinary(const u8 * bytes)
 	clearVariables();
 
 	mBinaryBlob.alloc(sizeof(sAciHeader));
-	memcpy(mBinaryBlob.data(), bytes, sizeof(sAciHeader));
+	memcpy(mBinaryBlob.getBytes(), bytes, sizeof(sAciHeader));
 
-	sAciHeader* hdr = (sAciHeader*)mBinaryBlob.data();
+	sAciHeader* hdr = (sAciHeader*)mBinaryBlob.getBytes();
 
 	if (memcmp(hdr->signature(), kAciStructSig.c_str(), 4) == 0)
 	{
@@ -91,6 +116,15 @@ void AciHeader::importBinary(const u8 * bytes)
 	mKc.size = hdr->kc().size();
 }
 
+void AciHeader::importBinary(const u8 * bytes, size_t len)
+{
+	if (len < sizeof(sAciHeader))
+	{
+		throw fnd::Exception(kModuleName, "ACI header too small");
+	}
+	importBinary(bytes);
+}
+
 AciHeader::AciType AciHeader::getAciType() const
 {
 	return mType;

lib/nx/AciHeader.h

@@ -1,9 +1,10 @@
 #pragma once
+#include <string>
 #include <fnd/types.h>
 #include <fnd/memory_blob.h>
-#include <string>
+#include <nx/ISerialiseableBinary.h>
 
-class AciHeader
+class AciHeader : public ISerialiseableBinary
 {
 public:
 	enum AciType
@@ -18,6 +19,13 @@ public:
 		size_t size;
 	};
 
+	AciHeader();
+	AciHeader(const AciHeader& other);
+	AciHeader(const u8* bytes);
+
+	bool operator==(const AciHeader& other);
+	void operator=(const AciHeader& other);
+
 	// to be used after export
 	const u8* getBytes() const;
 	size_t getSize() const;
@@ -25,6 +33,7 @@ public:
 	// export/import binary
 	void exportBinary();
 	void importBinary(const u8* bytes);
+	void importBinary(const u8* bytes, size_t len);
 
 	// variables
 	AciType getAciType() const;
@@ -56,13 +65,13 @@ private:
 		{
 		private:
 			u32 offset_; // aligned by 0x10 from the last one
-			u32 size_;
+			u32 mSize;
 		public:
 			u32 offset() const { return le_word(offset_); }
 			void set_offset(u32 offset) { offset_ = le_word(offset); }
 
-			u32 size() const { return le_word(size_); }
-			void set_size(u32 size) { size_ = le_word(size); }
+			u32 size() const { return le_word(mSize); }
+			void set_size(u32 size) { mSize = le_word(size); }
 		} fac_, sac_, kc_;
 		u8 reserved_3[8];
 	public:

lib/nx/ISerialiseableBinary.h

@@ -0,0 +1,17 @@
+#pragma once
+#include <fnd/types.h>
+
+class ISerialiseableBinary
+{
+public:
+	virtual bool operator==(const ISerialiseableBinary& other) = 0;
+	virtual void operator=(const ISerialiseableBinary& other) = 0;
+
+	virtual const u8* getBytes() const = 0;
+	virtual size_t getSize() const = 0;
+
+	virtual void exportBinary() = 0;
+	virtual void importBinary(const u8* bytes) = 0;
+	virtual void importBinary(const u8* bytes, size_t len) = 0;
+};
+

lib/nx/NcaHeader.cpp

@@ -4,7 +4,7 @@
 void NcaHeader::exportBinary()
 {
 	mBinaryBlob.alloc(sizeof(sNcaHeader));
-	sNcaHeader* hdr = (sNcaHeader*)mBinaryBlob.data();
+	sNcaHeader* hdr = (sNcaHeader*)mBinaryBlob.getBytes();
 
 	hdr->set_signature(kNcaSig.c_str());
 	hdr->set_block_size(kDefaultBlockSize);
@@ -36,9 +36,9 @@ void NcaHeader::importBinary(const u8 * bytes)
 	clearVariables();
 	
 	mBinaryBlob.alloc(sizeof(sNcaHeader));
-	memcpy(mBinaryBlob.data(), bytes, sizeof(sNcaHeader));
+	memcpy(mBinaryBlob.getBytes(), bytes, sizeof(sNcaHeader));
 
-	sNcaHeader* hdr = (sNcaHeader*)mBinaryBlob.data();
+	sNcaHeader* hdr = (sNcaHeader*)mBinaryBlob.getBytes();
 
 	if (memcmp(hdr->signature(), kNcaSig.c_str(), 4) != 0)
 	{
@@ -68,6 +68,15 @@ void NcaHeader::importBinary(const u8 * bytes)
 	}
 }
 
+void NcaHeader::importBinary(const u8 * bytes, size_t len)
+{
+	if (len < sizeof(sNcaHeader))
+	{
+		throw fnd::Exception(kModuleName, "NCA header size is too small");
+	}
+	importBinary(bytes);
+}
+
 u64 NcaHeader::getNcaSize() const
 {
 	return mNcaSize;
@@ -157,12 +166,22 @@ NcaHeader::NcaHeader(const u8 * bytes)
 	importBinary(bytes);
 }
 
+bool NcaHeader::operator==(const NcaHeader & other)
+{
+	return memcmp(this->getBytes(), other.getBytes(), this->getSize()) == 0;
+}
+
+void NcaHeader::operator=(const NcaHeader & other)
+{
+	this->importBinary(other.getBytes(), other.getSize());
+}
+
 const u8 * NcaHeader::getBytes() const
 {
-	return mBinaryBlob.data();
+	return mBinaryBlob.getBytes();
 }
 
 size_t NcaHeader::getSize() const
 {
-	return mBinaryBlob.size();
+	return mBinaryBlob.getSize();
 }

lib/nx/NcaHeader.h

@@ -1,12 +1,13 @@
 #pragma once
+#include <vector>
+#include <string>
 #include <fnd/types.h>
 #include <fnd/memory_blob.h>
 #include <crypto/aes.h>
 #include <crypto/sha.h>
-#include <vector>
-#include <string>
+#include <nx/ISerialiseableBinary.h>
 
-class NcaHeader
+class NcaHeader : public ISerialiseableBinary
 {
 public:
 	struct sSection
@@ -19,10 +20,15 @@ public:
 		crypto::sha::sSha256Hash hash;
 	};
 
+	static const size_t kDefaultBlockSize = 0x200;
+
 	NcaHeader();
 	NcaHeader(const NcaHeader& other);
 	NcaHeader(const u8* bytes);
 
+	bool operator==(const NcaHeader& other);
+	void operator=(const NcaHeader& other);
+
 	// to be used after export
 	const u8* getBytes() const;
 	size_t getSize() const;
@@ -30,6 +36,7 @@ public:
 	// export/import binary
 	void exportBinary();
 	void importBinary(const u8* bytes);
+	void importBinary(const u8* bytes, size_t len);
 
 	// variables
 	u64 getNcaSize() const;
@@ -45,7 +52,6 @@ public:
 private:
 	const std::string kModuleName = "NCA_HEADER";
 	const std::string kNcaSig = "NCA2";
-	static const size_t kDefaultBlockSize = 0x200;
 	static const size_t kSectionNum = 4;
 	static const size_t kAesKeyNum = 4;
 

lib/nx/SacEntry.cpp

@@ -0,0 +1,101 @@
+#include "SacEntry.h"
+
+SacEntry::SacEntry() :
+	mIsServer(false),
+	mName("")
+{
+}
+
+SacEntry::SacEntry(const SacEntry & other)
+{
+	importBinary(other.getBytes(), other.getSize());
+}
+
+SacEntry::SacEntry(const u8 * bytes)
+{
+	importBinary(bytes);
+}
+
+const u8 * SacEntry::getBytes() const
+{
+	return mBinaryBlob.getBytes();
+}
+
+size_t SacEntry::getSize() const
+{
+	return mBinaryBlob.getSize();
+}
+
+void SacEntry::exportBinary()
+{
+	try {
+		mBinaryBlob.alloc(mName.size() + 1);
+	}
+	catch (const fnd::Exception& e)
+	{
+		throw fnd::Exception(kModuleName, "Failed to allocate memory for SacEntry: " + std::string(e.what()));
+	}
+
+	if (mName.length() > kMaxServiceNameLen)
+	{
+		throw fnd::Exception(kModuleName, "Service name string too long (max 8 chars)");
+	}
+
+	// copy data into binary blob
+	mBinaryBlob[0] = (mIsServer ? SAC_IS_SERVER : 0) | (mName.length() & SAC_NAME_LEN_MASK);
+	memcpy(mBinaryBlob.getBytes() + 1, mName.c_str(), mName.length());
+}
+
+void SacEntry::importBinary(const u8 * bytes)
+{
+	bool isServer = (bytes[0] & SAC_IS_SERVER) == SAC_IS_SERVER;
+	size_t nameLen = (bytes[0] & SAC_NAME_LEN_MASK);
+	if (nameLen == 0)
+	{
+		throw fnd::Exception(kModuleName, "SAC entry has no service name");
+	}
+	else if (nameLen > kMaxServiceNameLen)
+	{
+		throw fnd::Exception(kModuleName, "Service name string too long (max 8 chars)");
+	}
+
+	mBinaryBlob.alloc(nameLen + 1);
+	memcpy(mBinaryBlob.getBytes(), bytes, mBinaryBlob.getSize());
+
+	mIsServer = isServer;
+	mName = std::string((const char*)(mBinaryBlob.getBytes() + 1), nameLen);
+}
+
+void SacEntry::importBinary(const u8 * bytes, size_t len)
+{
+	importBinary(bytes);
+	if (getSize() != len)
+	{
+		throw fnd::Exception(kModuleName, "SAC Entry has unexpected size");
+	}
+}
+
+bool SacEntry::isServer() const
+{
+	return mIsServer;
+}
+
+void SacEntry::setIsServer(bool isServer)
+{
+	mIsServer = isServer;
+}
+
+const std::string & SacEntry::getName() const
+{
+	return mName;
+}
+
+void SacEntry::setName(const std::string & name)
+{
+	if (name.length() > kMaxServiceNameLen)
+	{
+		throw fnd::Exception(kModuleName, "Service name string too long (max 8 chars)");
+	}
+
+	mName = name;
+}

lib/nx/SacEntry.h

@@ -0,0 +1,43 @@
+#pragma once
+#include <string>
+#include <fnd/types.h>
+#include <fnd/memory_blob.h>
+#include <nx/ISerialiseableBinary.h>
+
+class SacEntry : public ISerialiseableBinary
+{
+	SacEntry();
+	SacEntry(const SacEntry& other);
+	SacEntry(const u8* bytes);
+
+	// to be used after export
+	const u8* getBytes() const;
+	size_t getSize() const;
+
+	// export/import binary
+	void exportBinary();
+	void importBinary(const u8* bytes);
+	void importBinary(const u8* bytes, size_t len);
+
+	// variables
+	bool isServer() const;
+	void setIsServer(bool isServer);
+	const std::string& getName() const;
+	void setName(const std::string& name);
+private:
+	const std::string kModuleName = "SAC_ENTRY";
+	static const size_t kMaxServiceNameLen = 8;
+
+	enum SacEntryFlag
+	{
+		SAC_IS_SERVER = BIT(7),
+		SAC_NAME_LEN_MASK = BIT(7)-1
+	};
+
+	// raw binary
+	fnd::MemoryBlob mBinaryBlob;
+
+	// variables
+	bool mIsServer;
+	std::string mName;
+};

lib/nx/nx.vcxproj

@@ -20,12 +20,15 @@
   </ItemGroup>
   <ItemGroup>
     <ClInclude Include="AciHeader.h" />
+    <ClInclude Include="ISerialiseableBinary.h" />
     <ClInclude Include="NcaHeader.h" />
     <ClInclude Include="NXCrypto.h" />
+    <ClInclude Include="SacEntry.h" />
   </ItemGroup>
   <ItemGroup>
     <ClCompile Include="AciHeader.cpp" />
     <ClCompile Include="NcaHeader.cpp" />
+    <ClCompile Include="SacEntry.cpp" />
   </ItemGroup>
   <PropertyGroup Label="Globals">
     <VCProjectVersion>15.0</VCProjectVersion>

lib/nx/nx.vcxproj.filters

@@ -24,6 +24,12 @@
     <ClInclude Include="AciHeader.h">
       <Filter>Header Files</Filter>
     </ClInclude>
+    <ClInclude Include="SacEntry.h">
+      <Filter>Header Files</Filter>
+    </ClInclude>
+    <ClInclude Include="ISerialiseableBinary.h">
+      <Filter>Header Files</Filter>
+    </ClInclude>
   </ItemGroup>
   <ItemGroup>
     <ClCompile Include="NcaHeader.cpp">
@@ -32,5 +38,8 @@
     <ClCompile Include="AciHeader.cpp">
       <Filter>Source Files</Filter>
     </ClCompile>
+    <ClCompile Include="SacEntry.cpp">
+      <Filter>Source Files</Filter>
+    </ClCompile>
   </ItemGroup>
 </Project>