C++ (Cpp) PaddedBlockBitLength Exemples

Exemple #1

Fichier : pubkey.cpp Projet : AmesianX/encryption-library

bool DigestVerifierTemplate<P,F>::VerifyDigest(const byte *digest, unsigned int digestLen, const byte *signature) const
{
	SecByteBlock paddedBlock(PaddedBlockByteLength());
	f.ApplyFunction(Integer(signature, DigestSignatureLength())).Encode(paddedBlock, paddedBlock.size);
	SecByteBlock recoveredDigest(MaxDigestLength());
	unsigned int recoveredDigestLen = pad.Unpad(paddedBlock, PaddedBlockBitLength(), recoveredDigest);
	return digestLen == recoveredDigestLen && memcmp(digest, recoveredDigest, digestLen) == 0;
}

Exemple #2

Fichier : pubkey.cpp Projet : AmesianX/encryption-library

void DigestSignerTemplate<P,F>::SignDigest(RandomNumberGenerator &rng, const byte *digest, unsigned int digestLength, byte *signature) const
{
	assert(digestLength <= MaxDigestLength());

	SecByteBlock paddedBlock(PaddedBlockByteLength());
	pad.Pad(rng, digest, digestLength, paddedBlock, PaddedBlockBitLength());
	f.CalculateInverse(Integer(paddedBlock, paddedBlock.size)).Encode(signature, DigestSignatureLength());
}

Exemple #3

Fichier : pubkey.cpp Projet : AmesianX/encryption-library

void EncryptorTemplate<P,F>::Encrypt(RandomNumberGenerator &rng, const byte *plainText, unsigned int plainTextLength, byte *cipherText)
{
	assert(plainTextLength <= MaxPlainTextLength());

	SecByteBlock paddedBlock(PaddedBlockByteLength());
	pad.Pad(rng, plainText, plainTextLength, paddedBlock, PaddedBlockBitLength());
	f.ApplyFunction(Integer(paddedBlock, paddedBlock.size)).Encode(cipherText, CipherTextLength());
}

Exemple #4

Fichier : pubkey.cpp Projet : brolee/EMule-GIFC

DecodingResult TF_DecryptorBase::Decrypt(RandomNumberGenerator &rng, const byte *ciphertext, size_t ciphertextLength, byte *plaintext, const NameValuePairs &parameters) const
{
	SecByteBlock paddedBlock(PaddedBlockByteLength());
	Integer x = GetTrapdoorFunctionInterface().CalculateInverse(rng, Integer(ciphertext, FixedCiphertextLength()));
	if (x.ByteCount() > paddedBlock.size())
		x = Integer::Zero();	// don't return false here to prevent timing attack
	x.Encode(paddedBlock, paddedBlock.size());
	return GetMessageEncodingInterface().Unpad(paddedBlock, PaddedBlockBitLength(), plaintext, parameters);
}

Exemple #5

void TF_EncryptorBase::Encrypt(RandomNumberGenerator &rng, const byte *plaintext, unsigned int plaintextLength, byte *ciphertext, const NameValuePairs &parameters) const
{
	if (plaintextLength > FixedMaxPlaintextLength())
		throw InvalidArgument(AlgorithmName() + ": message too long for this public key");

	SecByteBlock paddedBlock(PaddedBlockByteLength());
	GetMessageEncodingInterface().Pad(rng, plaintext, plaintextLength, paddedBlock, PaddedBlockBitLength(), parameters);
	GetTrapdoorFunctionInterface().ApplyRandomizedFunction(rng, Integer(paddedBlock, paddedBlock.size())).Encode(ciphertext, FixedCiphertextLength());
}

Exemple #6

Fichier : pubkey.cpp Projet : BreakoutCoin/Breakout-Chain-Client

DecodingResult TF_DecryptorBase::Decrypt(RandomNumberGenerator &rng, const byte *ciphertext, size_t ciphertextLength, byte *plaintext, const NameValuePairs &parameters) const
{
	if (ciphertextLength != FixedCiphertextLength())
			throw InvalidArgument(AlgorithmName() + ": ciphertext length of " + IntToString(ciphertextLength) + " doesn't match the required length of " + IntToString(FixedCiphertextLength()) + " for this key");

	SecByteBlock paddedBlock(PaddedBlockByteLength());
	Integer x = GetTrapdoorFunctionInterface().CalculateInverse(rng, Integer(ciphertext, ciphertextLength));
	if (x.ByteCount() > paddedBlock.size())
		x = Integer::Zero();	// don't return false here to prevent timing attack
	x.Encode(paddedBlock, paddedBlock.size());
	return GetMessageEncodingInterface().Unpad(paddedBlock, PaddedBlockBitLength(), plaintext, parameters);
}

Exemple #7

Fichier : pubkey.cpp Projet : brolee/EMule-GIFC

void TF_EncryptorBase::Encrypt(RandomNumberGenerator &rng, const byte *plaintext, size_t plaintextLength, byte *ciphertext, const NameValuePairs &parameters) const
{
	if (plaintextLength > FixedMaxPlaintextLength())
	{
		if (FixedMaxPlaintextLength() < 1)
			throw InvalidArgument(AlgorithmName() + ": this key is too short to encrypt any messages");
		else
			throw InvalidArgument(AlgorithmName() + ": message length of " + IntToString(plaintextLength) + " exceeds the maximum of " + IntToString(FixedMaxPlaintextLength()) + " for this public key");
	}

	SecByteBlock paddedBlock(PaddedBlockByteLength());
	GetMessageEncodingInterface().Pad(rng, plaintext, plaintextLength, paddedBlock, PaddedBlockBitLength(), parameters);
	GetTrapdoorFunctionInterface().ApplyRandomizedFunction(rng, Integer(paddedBlock, paddedBlock.size())).Encode(ciphertext, FixedCiphertextLength());
}

Exemple #8

Fichier : rsa.hpp Projet : 524873576/inception

 word32 FixedMaxPlaintextLength() const 
             {return SaturatingSubtract(PaddedBlockBitLength() / 8, 10U); }

Exemple #9

Fichier : rsa.hpp Projet : 524873576/inception

 word32 PaddedBlockByteLength() const 
             {return BitsToBytes(PaddedBlockBitLength());}

Exemple #10

Fichier : pubkey.cpp Projet : AmesianX/encryption-library

unsigned int DecryptorTemplate<P,F>::Decrypt(const byte *cipherText, byte *plainText)
{
	SecByteBlock paddedBlock(PaddedBlockByteLength());
	f.CalculateInverse(Integer(cipherText, CipherTextLength())).Encode(paddedBlock, paddedBlock.size);
	return pad.Unpad(paddedBlock, PaddedBlockBitLength(), plainText);
}

Exemple #11

Fichier : pubkey.cpp Projet : AmesianX/encryption-library

unsigned int CryptoSystemBaseTemplate<P,F>::MaxPlainTextLength() const
{
	return pad.MaxUnpaddedLength(PaddedBlockBitLength());
}