C++ NameValuePairs::GetIntValueWithDefault方法代码示例

void ARC4_Base::UncheckedSetKey(const byte *key, unsigned int keyLen, const NameValuePairs &params)
{
	AssertValidKeyLength(keyLen);

	m_x = 1;
	m_y = 0;

	unsigned int i;
	for (i=0; i<256; i++)
		m_state[i] = i;

	unsigned int keyIndex = 0, stateIndex = 0;
	for (i=0; i<256; i++)
	{
		unsigned int a = m_state[i];
		stateIndex += key[keyIndex] + a;
		stateIndex &= 0xff;
		m_state[i] = m_state[stateIndex];
		m_state[stateIndex] = a;
		if (++keyIndex >= keyLen)
			keyIndex = 0;
	}

	int discardBytes = params.GetIntValueWithDefault("DiscardBytes", GetDefaultDiscardBytes());
	DiscardBytes(discardBytes);
}

void RawIDA::IsolatedInitialize(const NameValuePairs &parameters)
{
	if (!parameters.GetIntValue("RecoveryThreshold", m_threshold))
		throw InvalidArgument("RawIDA: missing RecoveryThreshold argument");

	CRYPTOPP_ASSERT(m_threshold > 0);
	if (m_threshold <= 0)
		throw InvalidArgument("RawIDA: RecoveryThreshold must be greater than 0");

	m_lastMapPosition = m_inputChannelMap.end();
	m_channelsReady = 0;
	m_channelsFinished = 0;
	m_w.New(m_threshold);
	m_y.New(m_threshold);
	m_inputQueues.reserve(m_threshold);

	m_outputChannelIds.clear();
	m_outputChannelIdStrings.clear();
	m_outputQueues.clear();

	word32 outputChannelID;
	if (parameters.GetValue("OutputChannelID", outputChannelID))
		AddOutputChannel(outputChannelID);
	else
	{
		int nShares = parameters.GetIntValueWithDefault("NumberOfShares", m_threshold);
		CRYPTOPP_ASSERT(nShares > 0);
		if (nShares <= 0) {nShares = m_threshold;}
		for (unsigned int i=0; i< (unsigned int)(nShares); i++)
			AddOutputChannel(i);
	}
}

void Redirector::Initialize(const NameValuePairs &parameters, int propagation)
{
	m_target = parameters.GetValueWithDefault("RedirectionTargetPointer", (BufferedTransformation*)NULL);
	m_behavior = parameters.GetIntValueWithDefault("RedirectionBehavior", PASS_EVERYTHING);

	if (m_target && GetPassSignals())
		m_target->Initialize(parameters, propagation);
}

void HashVerificationFilter::InitializeDerivedAndReturnNewSizes(const NameValuePairs &parameters, size_t &firstSize, size_t &blockSize, size_t &lastSize)
{
	m_flags = parameters.GetValueWithDefault(Name::HashVerificationFilterFlags(), (word32)DEFAULT_FLAGS);
	int s = parameters.GetIntValueWithDefault(Name::TruncatedDigestSize(), -1);
	m_digestSize = s < 0 ? m_hashModule.DigestSize() : s;
	m_verified = false;
	firstSize = m_flags & HASH_AT_BEGIN ? m_digestSize : 0;
	blockSize = 1;
	lastSize = m_flags & HASH_AT_BEGIN ? 0 : m_digestSize;
}

void Grouper::IsolatedInitialize(const NameValuePairs &parameters)
{
	m_groupSize = parameters.GetIntValueWithDefault("GroupSize", 0);
	ConstByteArrayParameter seperator, terminator;
	if (m_groupSize)
		parameters.GetRequiredParameter("Grouper", "Seperator", seperator);
	else
		parameters.GetValue("Seperator", seperator);
	parameters.GetValue("Terminator", terminator);

	m_seperator.Assign(seperator.begin(), seperator.size());
	m_terminator.Assign(terminator.begin(), terminator.size());
	m_counter = 0;
}

void CCM_Base::SetKeyWithoutResync(const byte *userKey, size_t keylength, const NameValuePairs &params)
{
	BlockCipher &blockCipher = AccessBlockCipher();
	blockCipher.SetKey(userKey, keylength, params);

	if (blockCipher.BlockSize() != REQUIRED_BLOCKSIZE)
		throw InvalidArgument(AlgorithmName() + ": block size of underlying block cipher is not 16");

	m_digestSize = params.GetIntValueWithDefault(Name::DigestSize(), DefaultDigestSize());
	if (m_digestSize % 2 > 0 || m_digestSize < 4 || m_digestSize > 16)
		throw InvalidArgument(AlgorithmName() + ": DigestSize must be 4, 6, 8, 10, 12, 14, or 16");

	m_buffer.Grow(2*REQUIRED_BLOCKSIZE);
	m_L = 8;
}

void Base64Encoder::IsolatedInitialize(const NameValuePairs &parameters)
{
    bool insertLineBreaks = parameters.GetValueWithDefault(Name::InsertLineBreaks(), true);
    int maxLineLength = parameters.GetIntValueWithDefault(Name::MaxLineLength(), 72);

    const char *lineBreak = insertLineBreaks ? "\n" : "";

    m_filter->Initialize(CombinedNameValuePairs(
                             parameters,
                             MakeParameters(Name::EncodingLookupArray(), &s_vec[0], false)
                             (Name::PaddingByte(), s_padding)
                             (Name::GroupSize(), insertLineBreaks ? maxLineLength : 0)
                             (Name::Separator(), ConstByteArrayParameter(lineBreak))
                             (Name::Terminator(), ConstByteArrayParameter(lineBreak))
                             (Name::Log2Base(), 6, true)));
}

void BenchMarkByName2(const char *factoryName, size_t keyLength = 0, const char *displayName=NULLPTR, const NameValuePairs &params = g_nullNameValuePairs)
{
	std::string name(factoryName ? factoryName : "");
	member_ptr<T_FactoryOutput> obj(ObjectFactoryRegistry<T_FactoryOutput>::Registry().CreateObject(name.c_str()));

	if (!keyLength)
		keyLength = obj->DefaultKeyLength();

	if (displayName)
		name = displayName;
	else if (keyLength)
		name += " (" + IntToString(keyLength * 8) + "-bit key)";

	const int blockSize = params.GetIntValueWithDefault(Name::BlockSize(), 0);
	obj->SetKey(defaultKey, keyLength, CombinedNameValuePairs(params, MakeParameters(Name::IV(), ConstByteArrayParameter(defaultKey, blockSize ? blockSize : obj->IVSize()), false)));
	BenchMark(name.c_str(), *static_cast<T_Interface *>(obj.get()), g_allocatedTime);
	BenchMarkKeying(*obj, keyLength, CombinedNameValuePairs(params, MakeParameters(Name::IV(), ConstByteArrayParameter(defaultKey, blockSize ? blockSize : obj->IVSize()), false)));
}

void SAFER::Base::UncheckedSetKey(const byte *userkey_1, unsigned int length, const NameValuePairs &params)
{
	bool strengthened = Strengthened();
	unsigned int nof_rounds = params.GetIntValueWithDefault(Name::Rounds(), length == 8 ? (strengthened ? 8 : 6) : 10);

	const byte *userkey_2 = length == 8 ? userkey_1 : userkey_1 + 8;
	keySchedule.New(1 + BLOCKSIZE * (1 + 2 * nof_rounds));

	unsigned int i, j;
	byte *key = keySchedule;
	SecByteBlock ka(BLOCKSIZE + 1), kb(BLOCKSIZE + 1);

	if (MAX_ROUNDS < nof_rounds)
		nof_rounds = MAX_ROUNDS;
	*key++ = (unsigned char)nof_rounds;
	ka[BLOCKSIZE] = 0;
	kb[BLOCKSIZE] = 0;
	for (j = 0; j < BLOCKSIZE; j++)
	{
		ka[BLOCKSIZE] ^= ka[j] = rotlFixed(userkey_1[j], 5U);
		kb[BLOCKSIZE] ^= kb[j] = *key++ = userkey_2[j];
	}

	for (i = 1; i <= nof_rounds; i++)
	{
		for (j = 0; j < BLOCKSIZE + 1; j++)
		{
			ka[j] = rotlFixed(ka[j], 6U);
			kb[j] = rotlFixed(kb[j], 6U);
		}
		for (j = 0; j < BLOCKSIZE; j++)
			if (strengthened)
				*key++ = (ka[(j + 2 * i - 1) % (BLOCKSIZE + 1)]
								+ exp_tab[exp_tab[18 * i + j + 1]]) & 0xFF;
			else
				*key++ = (ka[j] + exp_tab[exp_tab[18 * i + j + 1]]) & 0xFF;
		for (j = 0; j < BLOCKSIZE; j++)
			if (strengthened)
				*key++ = (kb[(j + 2 * i) % (BLOCKSIZE + 1)]
								+ exp_tab[exp_tab[18 * i + j + 10]]) & 0xFF;
			else
				*key++ = (kb[j] + exp_tab[exp_tab[18 * i + j + 10]]) & 0xFF;
	}
}

void RC2::Base::UncheckedSetKey(const byte *key, unsigned int keyLen, const NameValuePairs &params)
{
	AssertValidKeyLength(keyLen);

	int effectiveLen = params.GetIntValueWithDefault(Name::EffectiveKeyLength(), DEFAULT_EFFECTIVE_KEYLENGTH);
	if (effectiveLen > MAX_EFFECTIVE_KEYLENGTH)
		throw InvalidArgument("RC2: effective key length parameter exceeds maximum");

	static const unsigned char PITABLE[256] = {
		217,120,249,196, 25,221,181,237, 40,233,253,121, 74,160,216,157,
		198,126, 55,131, 43,118, 83,142, 98, 76,100,136, 68,139,251,162,
		 23,154, 89,245,135,179, 79, 19, 97, 69,109,141,  9,129,125, 50,
		189,143, 64,235,134,183,123, 11,240,149, 33, 34, 92,107, 78,130,
		 84,214,101,147,206, 96,178, 28,115, 86,192, 20,167,140,241,220,
		 18,117,202, 31, 59,190,228,209, 66, 61,212, 48,163, 60,182, 38,
		111,191, 14,218, 70,105,  7, 87, 39,242, 29,155,188,148, 67,  3,
		248, 17,199,246,144,239, 62,231,  6,195,213, 47,200,102, 30,215,
		  8,232,234,222,128, 82,238,247,132,170,114,172, 53, 77,106, 42,
		150, 26,210,113, 90, 21, 73,116, 75,159,208, 94,  4, 24,164,236,
		194,224, 65,110, 15, 81,203,204, 36,145,175, 80,161,244,112, 57,
		153,124, 58,133, 35,184,180,122,252,  2, 54, 91, 37, 85,151, 49,
		 45, 93,250,152,227,138,146,174,  5,223, 41, 16,103,108,186,201,
		211,  0,230,207,225,158,168, 44, 99, 22,  1, 63, 88,226,137,169,
		 13, 56, 52, 27,171, 51,255,176,187, 72, 12, 95,185,177,205, 46,
		197,243,219, 71,229,165,156,119, 10,166, 32,104,254,127,193,173};

	SecByteBlock L(128);
	memcpy(L, key, keyLen);

	int i;
	for (i=keyLen; i<128; i++)
		L[i] = PITABLE[(L[i-1] + L[i-keyLen]) & 255];

	unsigned int T8 = (effectiveLen+7) / 8;
	byte TM = byte((int)255 >> ((8-(effectiveLen%8))%8));
	L[128-T8] = PITABLE[L[128-T8] & TM];

	for (i=127-T8; i>=0; i--)
		L[i] = PITABLE[L[i+1] ^ L[i+T8]];

	for (i=0; i<64; i++)
		K[i] = L[2*i] + (L[2*i+1] << 8);
}

void SEAL_Policy<B>::CipherSetKey(const NameValuePairs &params, const byte *key, size_t length)
{
    m_insideCounter = m_outsideCounter = m_startCount = 0;

    unsigned int L = params.GetIntValueWithDefault("NumberOfOutputBitsPerPositionIndex", 32*1024);
    m_iterationsPerCount = L / 8192;

    SEAL_Gamma gamma(key);
    unsigned int i;

    for (i=0; i<512; i++)
        m_T[i] = gamma.Apply(i);

    for (i=0; i<256; i++)
        m_S[i] = gamma.Apply(0x1000+i);

    m_R.New(4*(L/8192));

    for (i=0; i<m_R.size(); i++)
        m_R[i] = gamma.Apply(0x2000+i);
}

void ChaCha_Policy::CipherSetKey(const NameValuePairs &params, const byte *key, size_t length)
{
    CRYPTOPP_UNUSED(params);
    CRYPTOPP_ASSERT(length == 16 || length == 32);

    m_rounds = params.GetIntValueWithDefault(Name::Rounds(), 20);
    if (!(m_rounds == 8 || m_rounds == 12 || m_rounds == 20))
        throw InvalidRounds(ChaCha::StaticAlgorithmName(), m_rounds);

    // "expand 16-byte k" or "expand 32-byte k"
    m_state[0] = 0x61707865;
    m_state[1] = (length == 16) ? 0x3120646e : 0x3320646e;
    m_state[2] = (length == 16) ? 0x79622d36 : 0x79622d32;
    m_state[3] = 0x6b206574;

    GetBlock<word32, LittleEndian> get1(key);
    get1(m_state[4])(m_state[5])(m_state[6])(m_state[7]);

    GetBlock<word32, LittleEndian> get2(key + ((length == 32) ? 16 : 0));
    get2(m_state[8])(m_state[9])(m_state[10])(m_state[11]);
}

void ByteQueue::IsolatedInitialize(const NameValuePairs &parameters)
{
	m_nodeSize = parameters.GetIntValueWithDefault("NodeSize", 256);
	Clear();
}

void HashFilter::IsolatedInitialize(const NameValuePairs &parameters)
{
	m_putMessage = parameters.GetValueWithDefault(Name::PutMessage(), false);
	int s = parameters.GetIntValueWithDefault(Name::TruncatedDigestSize(), -1);
	m_digestSize = s < 0 ? m_hashModule.DigestSize() : s;
}