FEncryption Namespace Reference

Functions
template<typename IntType >
IntType	CalculateGCD (IntType ValueA, IntType ValueB)
template<typename IntType >
IntType	CalculateMultiplicativeInverseOfExponent (IntType Exponent, IntType Totient)
template<typename IntType >
void	GenerateKeyPair (const IntType &P, const IntType &Q, FEncryptionKey &PublicKey, FEncryptionKey &PrivateKey)
template<typename IntType >
IntType	ModularPow (IntType Base, IntType Exponent, IntType Modulus)
template<typename IntType >
void	EncryptBytes (IntType *EncryptedData, const uint8 *Data, const int64 DataLength, const FEncryptionKey &EncryptionKey)
template<typename IntType >
void	DecryptBytes (uint8 *DecryptedData, const IntType *Data, const int64 DataLength, const FEncryptionKey &DecryptionKey)
void	EncryptSignature (const FDecryptedSignature &InUnencryptedSignature, FEncryptedSignature &OutEncryptedSignature, const FEncryptionKey &EncryptionKey)
void	DecryptSignature (const FEncryptedSignature &InEncryptedSignature, FDecryptedSignature &OutUnencryptedSignature, const FEncryptionKey &EncryptionKey)

Detailed Description

Math utils for encryption.

Function Documentation

CalculateGCD()

template<typename IntType >

IntType FEncryption::CalculateGCD	(	IntType	ValueA,
		IntType	ValueB
	)

Greatest common divisor of ValueA and ValueB.

CalculateMultiplicativeInverseOfExponent()

template<typename IntType >

IntType FEncryption::CalculateMultiplicativeInverseOfExponent	(	IntType	Exponent,
		IntType	Totient
	)

Multiplicative inverse of exponent using extended GCD algorithm.

Extended gcd: ax + by = gcd(a, b), where a = exponent, b = fi(n), gcd(a, b) = gcd(e, fi(n)) = 1, fi(n) is the Euler's totient function of n We only care to find d = x, which is our multiplicatve inverse of e (a).

DecryptBytes()

template<typename IntType >

void FEncryption::DecryptBytes	(	uint8 *	DecryptedData,
		const IntType *	Data,
		const int64	DataLength,
		const FEncryptionKey &	DecryptionKey
	)

Decrypts a stream of bytes

DecryptSignature()

void FEncryption::DecryptSignature ( const FEncryptedSignature &  InEncryptedSignature, FDecryptedSignature &  OutUnencryptedSignature, const FEncryptionKey &  EncryptionKey  )

inline

EncryptBytes()

template<typename IntType >

void FEncryption::EncryptBytes	(	IntType *	EncryptedData,
		const uint8 *	Data,
		const int64	DataLength,
		const FEncryptionKey &	EncryptionKey
	)

Encrypts a stream of bytes

EncryptSignature()

void FEncryption::EncryptSignature ( const FDecryptedSignature &  InUnencryptedSignature, FEncryptedSignature &  OutEncryptedSignature, const FEncryptionKey &  EncryptionKey  )

inline

GenerateKeyPair()

template<typename IntType >

void FEncryption::GenerateKeyPair	(	const IntType &	P,
		const IntType &	Q,
		FEncryptionKey &	PublicKey,
		FEncryptionKey &	PrivateKey
	)

Generate Key Pair for encryption and decryption.

ModularPow()

template<typename IntType >

IntType FEncryption::ModularPow	(	IntType	Base,
		IntType	Exponent,
		IntType	Modulus
	)

Raise Base to power of Exponent in mod Modulus.