mirror of
https://github.com/shadps4-emu/ext-cryptopp.git
synced 2024-12-17 23:38:35 +00:00
59b94d2bbf
* Conditionally use a lambda rather than the older `bind2nd` style. * Duplicate the if statements. * Centralise the conditional compilation to an implementation of find_if_not. * Refactoring of name and code placement after review. * Use `FindIfNot` where appropriate. * Remove whitespace.
424 lines
12 KiB
C++
424 lines
12 KiB
C++
// ida.cpp - originally written and placed in the public domain by Wei Dai
|
|
|
|
#include "pch.h"
|
|
#include "config.h"
|
|
|
|
#include "ida.h"
|
|
#include "stdcpp.h"
|
|
#include "algebra.h"
|
|
#include "gf2_32.h"
|
|
#include "polynomi.h"
|
|
#include "polynomi.cpp"
|
|
|
|
ANONYMOUS_NAMESPACE_BEGIN
|
|
const CryptoPP::GF2_32 field;
|
|
NAMESPACE_END
|
|
|
|
NAMESPACE_BEGIN(CryptoPP)
|
|
|
|
#if (defined(_MSC_VER) && (_MSC_VER < 1400)) && !defined(__MWERKS__)
|
|
// VC60 and VC7 workaround: built-in reverse_iterator has two template parameters, Dinkumware only has one
|
|
typedef std::reverse_bidirectional_iterator<const byte *, const byte> RevIt;
|
|
#elif defined(_RWSTD_NO_CLASS_PARTIAL_SPEC)
|
|
typedef std::reverse_iterator<const byte *, std::random_access_iterator_tag, const byte> RevIt;
|
|
#else
|
|
typedef std::reverse_iterator<const byte *> RevIt;
|
|
#endif
|
|
|
|
void RawIDA::IsolatedInitialize(const NameValuePairs ¶meters)
|
|
{
|
|
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);
|
|
}
|
|
}
|
|
|
|
unsigned int RawIDA::InsertInputChannel(word32 channelId)
|
|
{
|
|
if (m_lastMapPosition != m_inputChannelMap.end())
|
|
{
|
|
if (m_lastMapPosition->first == channelId)
|
|
goto skipFind;
|
|
++m_lastMapPosition;
|
|
if (m_lastMapPosition != m_inputChannelMap.end() && m_lastMapPosition->first == channelId)
|
|
goto skipFind;
|
|
}
|
|
m_lastMapPosition = m_inputChannelMap.find(channelId);
|
|
|
|
skipFind:
|
|
if (m_lastMapPosition == m_inputChannelMap.end())
|
|
{
|
|
if (m_inputChannelIds.size() == size_t(m_threshold))
|
|
return m_threshold;
|
|
|
|
m_lastMapPosition = m_inputChannelMap.insert(InputChannelMap::value_type(channelId, (unsigned int)m_inputChannelIds.size())).first;
|
|
m_inputQueues.push_back(MessageQueue());
|
|
m_inputChannelIds.push_back(channelId);
|
|
|
|
if (m_inputChannelIds.size() == size_t(m_threshold))
|
|
PrepareInterpolation();
|
|
}
|
|
return m_lastMapPosition->second;
|
|
}
|
|
|
|
unsigned int RawIDA::LookupInputChannel(word32 channelId) const
|
|
{
|
|
std::map<word32, unsigned int>::const_iterator it = m_inputChannelMap.find(channelId);
|
|
if (it == m_inputChannelMap.end())
|
|
return m_threshold;
|
|
else
|
|
return it->second;
|
|
}
|
|
|
|
void RawIDA::ChannelData(word32 channelId, const byte *inString, size_t length, bool messageEnd)
|
|
{
|
|
int i = InsertInputChannel(channelId);
|
|
if (i < m_threshold)
|
|
{
|
|
lword size = m_inputQueues[i].MaxRetrievable();
|
|
m_inputQueues[i].Put(inString, length);
|
|
if (size < 4 && size + length >= 4)
|
|
{
|
|
m_channelsReady++;
|
|
if (m_channelsReady == size_t(m_threshold))
|
|
ProcessInputQueues();
|
|
}
|
|
|
|
if (messageEnd)
|
|
{
|
|
m_inputQueues[i].MessageEnd();
|
|
if (m_inputQueues[i].NumberOfMessages() == 1)
|
|
{
|
|
m_channelsFinished++;
|
|
if (m_channelsFinished == size_t(m_threshold))
|
|
{
|
|
m_channelsReady = 0;
|
|
for (i=0; i<m_threshold; i++)
|
|
m_channelsReady += m_inputQueues[i].AnyRetrievable();
|
|
ProcessInputQueues();
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
lword RawIDA::InputBuffered(word32 channelId) const
|
|
{
|
|
int i = LookupInputChannel(channelId);
|
|
return i < m_threshold ? m_inputQueues[i].MaxRetrievable() : 0;
|
|
}
|
|
|
|
void RawIDA::ComputeV(unsigned int i)
|
|
{
|
|
if (i >= m_v.size())
|
|
{
|
|
m_v.resize(i+1);
|
|
m_outputToInput.resize(i+1);
|
|
}
|
|
|
|
m_outputToInput[i] = LookupInputChannel(m_outputChannelIds[i]);
|
|
if (m_outputToInput[i] == size_t(m_threshold) && i * size_t(m_threshold) <= 1000*1000)
|
|
{
|
|
m_v[i].resize(m_threshold);
|
|
PrepareBulkPolynomialInterpolationAt(field, m_v[i].begin(), m_outputChannelIds[i], &(m_inputChannelIds[0]), m_w.begin(), m_threshold);
|
|
}
|
|
}
|
|
|
|
void RawIDA::AddOutputChannel(word32 channelId)
|
|
{
|
|
m_outputChannelIds.push_back(channelId);
|
|
m_outputChannelIdStrings.push_back(WordToString(channelId));
|
|
m_outputQueues.push_back(ByteQueue());
|
|
if (m_inputChannelIds.size() == size_t(m_threshold))
|
|
ComputeV((unsigned int)m_outputChannelIds.size() - 1);
|
|
}
|
|
|
|
void RawIDA::PrepareInterpolation()
|
|
{
|
|
CRYPTOPP_ASSERT(m_inputChannelIds.size() == size_t(m_threshold));
|
|
PrepareBulkPolynomialInterpolation(field, m_w.begin(), &(m_inputChannelIds[0]), (unsigned int)(m_threshold));
|
|
for (unsigned int i=0; i<m_outputChannelIds.size(); i++)
|
|
ComputeV(i);
|
|
}
|
|
|
|
void RawIDA::ProcessInputQueues()
|
|
{
|
|
bool finished = (m_channelsFinished == size_t(m_threshold));
|
|
unsigned int i;
|
|
|
|
while (finished ? m_channelsReady > 0 : m_channelsReady == size_t(m_threshold))
|
|
{
|
|
m_channelsReady = 0;
|
|
for (i=0; i<size_t(m_threshold); i++)
|
|
{
|
|
MessageQueue &queue = m_inputQueues[i];
|
|
queue.GetWord32(m_y[i]);
|
|
|
|
if (finished)
|
|
m_channelsReady += queue.AnyRetrievable();
|
|
else
|
|
m_channelsReady += queue.NumberOfMessages() > 0 || queue.MaxRetrievable() >= 4;
|
|
}
|
|
|
|
for (i=0; (unsigned int)i<m_outputChannelIds.size(); i++)
|
|
{
|
|
if (m_outputToInput[i] != size_t(m_threshold))
|
|
m_outputQueues[i].PutWord32(m_y[m_outputToInput[i]]);
|
|
else if (m_v[i].size() == size_t(m_threshold))
|
|
m_outputQueues[i].PutWord32(BulkPolynomialInterpolateAt(field, m_y.begin(), m_v[i].begin(), m_threshold));
|
|
else
|
|
{
|
|
m_u.resize(m_threshold);
|
|
PrepareBulkPolynomialInterpolationAt(field, m_u.begin(), m_outputChannelIds[i], &(m_inputChannelIds[0]), m_w.begin(), m_threshold);
|
|
m_outputQueues[i].PutWord32(BulkPolynomialInterpolateAt(field, m_y.begin(), m_u.begin(), m_threshold));
|
|
}
|
|
}
|
|
}
|
|
|
|
if (m_outputChannelIds.size() > 0 && m_outputQueues[0].AnyRetrievable())
|
|
FlushOutputQueues();
|
|
|
|
if (finished)
|
|
{
|
|
OutputMessageEnds();
|
|
|
|
m_channelsReady = 0;
|
|
m_channelsFinished = 0;
|
|
m_v.clear();
|
|
|
|
std::vector<MessageQueue> inputQueues;
|
|
std::vector<word32> inputChannelIds;
|
|
|
|
inputQueues.swap(m_inputQueues);
|
|
inputChannelIds.swap(m_inputChannelIds);
|
|
m_inputChannelMap.clear();
|
|
m_lastMapPosition = m_inputChannelMap.end();
|
|
|
|
for (i=0; i<size_t(m_threshold); i++)
|
|
{
|
|
inputQueues[i].GetNextMessage();
|
|
inputQueues[i].TransferAllTo(*AttachedTransformation(), WordToString(inputChannelIds[i]));
|
|
}
|
|
}
|
|
}
|
|
|
|
void RawIDA::FlushOutputQueues()
|
|
{
|
|
for (unsigned int i=0; i<m_outputChannelIds.size(); i++)
|
|
m_outputQueues[i].TransferAllTo(*AttachedTransformation(), m_outputChannelIdStrings[i]);
|
|
}
|
|
|
|
void RawIDA::OutputMessageEnds()
|
|
{
|
|
if (GetAutoSignalPropagation() != 0)
|
|
{
|
|
for (unsigned int i=0; i<m_outputChannelIds.size(); i++)
|
|
AttachedTransformation()->ChannelMessageEnd(m_outputChannelIdStrings[i], GetAutoSignalPropagation()-1);
|
|
}
|
|
}
|
|
|
|
// ****************************************************************
|
|
|
|
void SecretSharing::IsolatedInitialize(const NameValuePairs ¶meters)
|
|
{
|
|
m_pad = parameters.GetValueWithDefault("AddPadding", true);
|
|
m_ida.IsolatedInitialize(parameters);
|
|
}
|
|
|
|
size_t SecretSharing::Put2(const byte *begin, size_t length, int messageEnd, bool blocking)
|
|
{
|
|
if (!blocking)
|
|
throw BlockingInputOnly("SecretSharing");
|
|
|
|
SecByteBlock buf(UnsignedMin(256, length));
|
|
unsigned int threshold = m_ida.GetThreshold();
|
|
while (length > 0)
|
|
{
|
|
size_t len = STDMIN(length, buf.size());
|
|
m_ida.ChannelData(0xffffffff, begin, len, false);
|
|
for (unsigned int i=0; i<threshold-1; i++)
|
|
{
|
|
m_rng.GenerateBlock(buf, len);
|
|
m_ida.ChannelData(i, buf, len, false);
|
|
}
|
|
length -= len;
|
|
begin += len;
|
|
}
|
|
|
|
if (messageEnd)
|
|
{
|
|
m_ida.SetAutoSignalPropagation(messageEnd-1);
|
|
if (m_pad)
|
|
{
|
|
SecretSharing::Put(1);
|
|
while (m_ida.InputBuffered(0xffffffff) > 0)
|
|
SecretSharing::Put(0);
|
|
}
|
|
m_ida.ChannelData(0xffffffff, NULLPTR, 0, true);
|
|
for (unsigned int i=0; i<m_ida.GetThreshold()-1; i++)
|
|
m_ida.ChannelData(i, NULLPTR, 0, true);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
void SecretRecovery::IsolatedInitialize(const NameValuePairs ¶meters)
|
|
{
|
|
m_pad = parameters.GetValueWithDefault("RemovePadding", true);
|
|
RawIDA::IsolatedInitialize(CombinedNameValuePairs(parameters, MakeParameters("OutputChannelID", (word32)0xffffffff)));
|
|
}
|
|
|
|
void SecretRecovery::FlushOutputQueues()
|
|
{
|
|
if (m_pad)
|
|
m_outputQueues[0].TransferTo(*AttachedTransformation(), m_outputQueues[0].MaxRetrievable()-4);
|
|
else
|
|
m_outputQueues[0].TransferTo(*AttachedTransformation());
|
|
}
|
|
|
|
void SecretRecovery::OutputMessageEnds()
|
|
{
|
|
if (m_pad)
|
|
{
|
|
PaddingRemover paddingRemover(new Redirector(*AttachedTransformation()));
|
|
m_outputQueues[0].TransferAllTo(paddingRemover);
|
|
}
|
|
|
|
if (GetAutoSignalPropagation() != 0)
|
|
AttachedTransformation()->MessageEnd(GetAutoSignalPropagation()-1);
|
|
}
|
|
|
|
// ****************************************************************
|
|
|
|
void InformationDispersal::IsolatedInitialize(const NameValuePairs ¶meters)
|
|
{
|
|
m_nextChannel = 0;
|
|
m_pad = parameters.GetValueWithDefault("AddPadding", true);
|
|
m_ida.IsolatedInitialize(parameters);
|
|
}
|
|
|
|
size_t InformationDispersal::Put2(const byte *begin, size_t length, int messageEnd, bool blocking)
|
|
{
|
|
if (!blocking)
|
|
throw BlockingInputOnly("InformationDispersal");
|
|
|
|
while (length--)
|
|
{
|
|
m_ida.ChannelData(m_nextChannel, begin, 1, false);
|
|
begin++;
|
|
m_nextChannel++;
|
|
if (m_nextChannel == m_ida.GetThreshold())
|
|
m_nextChannel = 0;
|
|
}
|
|
|
|
if (messageEnd)
|
|
{
|
|
m_ida.SetAutoSignalPropagation(messageEnd-1);
|
|
if (m_pad)
|
|
InformationDispersal::Put(1);
|
|
for (word32 i=0; i<m_ida.GetThreshold(); i++)
|
|
m_ida.ChannelData(i, NULLPTR, 0, true);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
void InformationRecovery::IsolatedInitialize(const NameValuePairs ¶meters)
|
|
{
|
|
m_pad = parameters.GetValueWithDefault("RemovePadding", true);
|
|
RawIDA::IsolatedInitialize(parameters);
|
|
}
|
|
|
|
void InformationRecovery::FlushOutputQueues()
|
|
{
|
|
while (m_outputQueues[0].AnyRetrievable())
|
|
{
|
|
for (unsigned int i=0; i<m_outputChannelIds.size(); i++)
|
|
m_outputQueues[i].TransferTo(m_queue, 1);
|
|
}
|
|
|
|
if (m_pad)
|
|
m_queue.TransferTo(*AttachedTransformation(), m_queue.MaxRetrievable()-4*m_threshold);
|
|
else
|
|
m_queue.TransferTo(*AttachedTransformation());
|
|
}
|
|
|
|
void InformationRecovery::OutputMessageEnds()
|
|
{
|
|
if (m_pad)
|
|
{
|
|
PaddingRemover paddingRemover(new Redirector(*AttachedTransformation()));
|
|
m_queue.TransferAllTo(paddingRemover);
|
|
}
|
|
|
|
if (GetAutoSignalPropagation() != 0)
|
|
AttachedTransformation()->MessageEnd(GetAutoSignalPropagation()-1);
|
|
}
|
|
|
|
size_t PaddingRemover::Put2(const byte *begin, size_t length, int messageEnd, bool blocking)
|
|
{
|
|
if (!blocking)
|
|
throw BlockingInputOnly("PaddingRemover");
|
|
|
|
const byte *const end = begin + length;
|
|
|
|
if (m_possiblePadding)
|
|
{
|
|
size_t len = FindIfNot(begin, end, byte(0)) - begin;
|
|
m_zeroCount += len;
|
|
begin += len;
|
|
if (begin == end)
|
|
return 0;
|
|
|
|
AttachedTransformation()->Put(1);
|
|
while (m_zeroCount--)
|
|
AttachedTransformation()->Put(0);
|
|
AttachedTransformation()->Put(*begin++);
|
|
m_possiblePadding = false;
|
|
}
|
|
|
|
const byte *x = FindIfNot(RevIt(end), RevIt(begin), byte(0)).base();
|
|
if (x != begin && *(x-1) == 1)
|
|
{
|
|
AttachedTransformation()->Put(begin, x-begin-1);
|
|
m_possiblePadding = true;
|
|
m_zeroCount = end - x;
|
|
}
|
|
else
|
|
AttachedTransformation()->Put(begin, end-begin);
|
|
|
|
if (messageEnd)
|
|
{
|
|
m_possiblePadding = false;
|
|
Output(0, begin, length, messageEnd, blocking);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
NAMESPACE_END
|