00001
00002
00003 #include "pch.h"
00004
00005 #ifndef CRYPTOPP_IMPORTS
00006
00007 #include "filters.h"
00008 #include "mqueue.h"
00009 #include "fltrimpl.h"
00010 #include "argnames.h"
00011 #include <memory>
00012 #include <functional>
00013
00014 NAMESPACE_BEGIN(CryptoPP)
00015
00016 Filter::Filter(BufferedTransformation *attachment)
00017 : m_attachment(attachment), m_continueAt(0)
00018 {
00019 }
00020
00021 BufferedTransformation * Filter::NewDefaultAttachment() const
00022 {
00023 return new MessageQueue;
00024 }
00025
00026 BufferedTransformation * Filter::AttachedTransformation()
00027 {
00028 if (m_attachment.get() == NULL)
00029 m_attachment.reset(NewDefaultAttachment());
00030 return m_attachment.get();
00031 }
00032
00033 const BufferedTransformation *Filter::AttachedTransformation() const
00034 {
00035 if (m_attachment.get() == NULL)
00036 const_cast<Filter *>(this)->m_attachment.reset(NewDefaultAttachment());
00037 return m_attachment.get();
00038 }
00039
00040 void Filter::Detach(BufferedTransformation *newOut)
00041 {
00042 m_attachment.reset(newOut);
00043 NotifyAttachmentChange();
00044 }
00045
00046 void Filter::Insert(Filter *filter)
00047 {
00048 filter->m_attachment.reset(m_attachment.release());
00049 m_attachment.reset(filter);
00050 NotifyAttachmentChange();
00051 }
00052
00053 unsigned int Filter::CopyRangeTo2(BufferedTransformation &target, unsigned long &begin, unsigned long end, const std::string &channel, bool blocking) const
00054 {
00055 return AttachedTransformation()->CopyRangeTo2(target, begin, end, channel, blocking);
00056 }
00057
00058 unsigned int Filter::TransferTo2(BufferedTransformation &target, unsigned long &transferBytes, const std::string &channel, bool blocking)
00059 {
00060 return AttachedTransformation()->TransferTo2(target, transferBytes, channel, blocking);
00061 }
00062
00063 void Filter::Initialize(const NameValuePairs ¶meters, int propagation)
00064 {
00065 m_continueAt = 0;
00066 IsolatedInitialize(parameters);
00067 PropagateInitialize(parameters, propagation);
00068 }
00069
00070 bool Filter::Flush(bool hardFlush, int propagation, bool blocking)
00071 {
00072 switch (m_continueAt)
00073 {
00074 case 0:
00075 if (IsolatedFlush(hardFlush, blocking))
00076 return true;
00077 case 1:
00078 if (OutputFlush(1, hardFlush, propagation, blocking))
00079 return true;
00080 }
00081 return false;
00082 }
00083
00084 bool Filter::MessageSeriesEnd(int propagation, bool blocking)
00085 {
00086 switch (m_continueAt)
00087 {
00088 case 0:
00089 if (IsolatedMessageSeriesEnd(blocking))
00090 return true;
00091 case 1:
00092 if (ShouldPropagateMessageSeriesEnd() && OutputMessageSeriesEnd(1, propagation, blocking))
00093 return true;
00094 }
00095 return false;
00096 }
00097
00098 void Filter::PropagateInitialize(const NameValuePairs ¶meters, int propagation, const std::string &channel)
00099 {
00100 if (propagation)
00101 AttachedTransformation()->ChannelInitialize(channel, parameters, propagation-1);
00102 }
00103
00104 unsigned int Filter::Output(int outputSite, const byte *inString, unsigned int length, int messageEnd, bool blocking, const std::string &channel)
00105 {
00106 if (messageEnd)
00107 messageEnd--;
00108 unsigned int result = AttachedTransformation()->Put2(inString, length, messageEnd, blocking);
00109 m_continueAt = result ? outputSite : 0;
00110 return result;
00111 }
00112
00113 bool Filter::OutputFlush(int outputSite, bool hardFlush, int propagation, bool blocking, const std::string &channel)
00114 {
00115 if (propagation && AttachedTransformation()->ChannelFlush(channel, hardFlush, propagation-1, blocking))
00116 {
00117 m_continueAt = outputSite;
00118 return true;
00119 }
00120 m_continueAt = 0;
00121 return false;
00122 }
00123
00124 bool Filter::OutputMessageSeriesEnd(int outputSite, int propagation, bool blocking, const std::string &channel)
00125 {
00126 if (propagation && AttachedTransformation()->ChannelMessageSeriesEnd(channel, propagation-1, blocking))
00127 {
00128 m_continueAt = outputSite;
00129 return true;
00130 }
00131 m_continueAt = 0;
00132 return false;
00133 }
00134
00135
00136
00137 unsigned int MeterFilter::Put2(const byte *begin, unsigned int length, int messageEnd, bool blocking)
00138 {
00139 FILTER_BEGIN;
00140 m_currentMessageBytes += length;
00141 m_totalBytes += length;
00142
00143 if (messageEnd)
00144 {
00145 m_currentMessageBytes = 0;
00146 m_currentSeriesMessages++;
00147 m_totalMessages++;
00148 }
00149
00150 FILTER_OUTPUT(1, begin, length, messageEnd);
00151 FILTER_END;
00152 }
00153
00154 bool MeterFilter::IsolatedMessageSeriesEnd(bool blocking)
00155 {
00156 m_currentMessageBytes = 0;
00157 m_currentSeriesMessages = 0;
00158 m_totalMessageSeries++;
00159 return false;
00160 }
00161
00162
00163
00164 void FilterWithBufferedInput::BlockQueue::ResetQueue(unsigned int blockSize, unsigned int maxBlocks)
00165 {
00166 m_buffer.New(blockSize * maxBlocks);
00167 m_blockSize = blockSize;
00168 m_maxBlocks = maxBlocks;
00169 m_size = 0;
00170 m_begin = m_buffer;
00171 }
00172
00173 byte *FilterWithBufferedInput::BlockQueue::GetBlock()
00174 {
00175 if (m_size >= m_blockSize)
00176 {
00177 byte *ptr = m_begin;
00178 if ((m_begin+=m_blockSize) == m_buffer.end())
00179 m_begin = m_buffer;
00180 m_size -= m_blockSize;
00181 return ptr;
00182 }
00183 else
00184 return NULL;
00185 }
00186
00187 byte *FilterWithBufferedInput::BlockQueue::GetContigousBlocks(unsigned int &numberOfBytes)
00188 {
00189 numberOfBytes = STDMIN(numberOfBytes, STDMIN((unsigned int)(m_buffer.end()-m_begin), m_size));
00190 byte *ptr = m_begin;
00191 m_begin += numberOfBytes;
00192 m_size -= numberOfBytes;
00193 if (m_size == 0 || m_begin == m_buffer.end())
00194 m_begin = m_buffer;
00195 return ptr;
00196 }
00197
00198 unsigned int FilterWithBufferedInput::BlockQueue::GetAll(byte *outString)
00199 {
00200 unsigned int size = m_size;
00201 unsigned int numberOfBytes = m_maxBlocks*m_blockSize;
00202 const byte *ptr = GetContigousBlocks(numberOfBytes);
00203 memcpy(outString, ptr, numberOfBytes);
00204 memcpy(outString+numberOfBytes, m_begin, m_size);
00205 m_size = 0;
00206 return size;
00207 }
00208
00209 void FilterWithBufferedInput::BlockQueue::Put(const byte *inString, unsigned int length)
00210 {
00211 assert(m_size + length <= m_buffer.size());
00212 byte *end = (m_size < (unsigned int)(m_buffer.end()-m_begin)) ? m_begin + m_size : m_begin + m_size - m_buffer.size();
00213 unsigned int len = STDMIN(length, (unsigned int)(m_buffer.end()-end));
00214 memcpy(end, inString, len);
00215 if (len < length)
00216 memcpy(m_buffer, inString+len, length-len);
00217 m_size += length;
00218 }
00219
00220 FilterWithBufferedInput::FilterWithBufferedInput(BufferedTransformation *attachment)
00221 : Filter(attachment)
00222 {
00223 }
00224
00225 FilterWithBufferedInput::FilterWithBufferedInput(unsigned int firstSize, unsigned int blockSize, unsigned int lastSize, BufferedTransformation *attachment)
00226 : Filter(attachment), m_firstSize(firstSize), m_blockSize(blockSize), m_lastSize(lastSize)
00227 , m_firstInputDone(false)
00228 {
00229 if (m_firstSize < 0 || m_blockSize < 1 || m_lastSize < 0)
00230 throw InvalidArgument("FilterWithBufferedInput: invalid buffer size");
00231
00232 m_queue.ResetQueue(1, m_firstSize);
00233 }
00234
00235 void FilterWithBufferedInput::IsolatedInitialize(const NameValuePairs ¶meters)
00236 {
00237 InitializeDerivedAndReturnNewSizes(parameters, m_firstSize, m_blockSize, m_lastSize);
00238 if (m_firstSize < 0 || m_blockSize < 1 || m_lastSize < 0)
00239 throw InvalidArgument("FilterWithBufferedInput: invalid buffer size");
00240 m_queue.ResetQueue(1, m_firstSize);
00241 m_firstInputDone = false;
00242 }
00243
00244 bool FilterWithBufferedInput::IsolatedFlush(bool hardFlush, bool blocking)
00245 {
00246 if (!blocking)
00247 throw BlockingInputOnly("FilterWithBufferedInput");
00248
00249 if (hardFlush)
00250 ForceNextPut();
00251 FlushDerived();
00252
00253 return false;
00254 }
00255
00256 unsigned int FilterWithBufferedInput::PutMaybeModifiable(byte *inString, unsigned int length, int messageEnd, bool blocking, bool modifiable)
00257 {
00258 if (!blocking)
00259 throw BlockingInputOnly("FilterWithBufferedInput");
00260
00261 if (length != 0)
00262 {
00263 unsigned int newLength = m_queue.CurrentSize() + length;
00264
00265 if (!m_firstInputDone && newLength >= m_firstSize)
00266 {
00267 unsigned int len = m_firstSize - m_queue.CurrentSize();
00268 m_queue.Put(inString, len);
00269 FirstPut(m_queue.GetContigousBlocks(m_firstSize));
00270 assert(m_queue.CurrentSize() == 0);
00271 m_queue.ResetQueue(m_blockSize, (2*m_blockSize+m_lastSize-2)/m_blockSize);
00272
00273 inString += len;
00274 newLength -= m_firstSize;
00275 m_firstInputDone = true;
00276 }
00277
00278 if (m_firstInputDone)
00279 {
00280 if (m_blockSize == 1)
00281 {
00282 while (newLength > m_lastSize && m_queue.CurrentSize() > 0)
00283 {
00284 unsigned int len = newLength - m_lastSize;
00285 byte *ptr = m_queue.GetContigousBlocks(len);
00286 NextPutModifiable(ptr, len);
00287 newLength -= len;
00288 }
00289
00290 if (newLength > m_lastSize)
00291 {
00292 unsigned int len = newLength - m_lastSize;
00293 NextPutMaybeModifiable(inString, len, modifiable);
00294 inString += len;
00295 newLength -= len;
00296 }
00297 }
00298 else
00299 {
00300 while (newLength >= m_blockSize + m_lastSize && m_queue.CurrentSize() >= m_blockSize)
00301 {
00302 NextPutModifiable(m_queue.GetBlock(), m_blockSize);
00303 newLength -= m_blockSize;
00304 }
00305
00306 if (newLength >= m_blockSize + m_lastSize && m_queue.CurrentSize() > 0)
00307 {
00308 assert(m_queue.CurrentSize() < m_blockSize);
00309 unsigned int len = m_blockSize - m_queue.CurrentSize();
00310 m_queue.Put(inString, len);
00311 inString += len;
00312 NextPutModifiable(m_queue.GetBlock(), m_blockSize);
00313 newLength -= m_blockSize;
00314 }
00315
00316 if (newLength >= m_blockSize + m_lastSize)
00317 {
00318 unsigned int len = RoundDownToMultipleOf(newLength - m_lastSize, m_blockSize);
00319 NextPutMaybeModifiable(inString, len, modifiable);
00320 inString += len;
00321 newLength -= len;
00322 }
00323 }
00324 }
00325
00326 m_queue.Put(inString, newLength - m_queue.CurrentSize());
00327 }
00328
00329 if (messageEnd)
00330 {
00331 if (!m_firstInputDone && m_firstSize==0)
00332 FirstPut(NULL);
00333
00334 SecByteBlock temp(m_queue.CurrentSize());
00335 m_queue.GetAll(temp);
00336 LastPut(temp, temp.size());
00337
00338 m_firstInputDone = false;
00339 m_queue.ResetQueue(1, m_firstSize);
00340
00341 Output(1, NULL, 0, messageEnd, blocking);
00342 }
00343 return 0;
00344 }
00345
00346 void FilterWithBufferedInput::ForceNextPut()
00347 {
00348 if (!m_firstInputDone)
00349 return;
00350
00351 if (m_blockSize > 1)
00352 {
00353 while (m_queue.CurrentSize() >= m_blockSize)
00354 NextPutModifiable(m_queue.GetBlock(), m_blockSize);
00355 }
00356 else
00357 {
00358 unsigned int len;
00359 while ((len = m_queue.CurrentSize()) > 0)
00360 NextPutModifiable(m_queue.GetContigousBlocks(len), len);
00361 }
00362 }
00363
00364 void FilterWithBufferedInput::NextPutMultiple(const byte *inString, unsigned int length)
00365 {
00366 assert(m_blockSize > 1);
00367 while (length > 0)
00368 {
00369 assert(length >= m_blockSize);
00370 NextPutSingle(inString);
00371 inString += m_blockSize;
00372 length -= m_blockSize;
00373 }
00374 }
00375
00376
00377
00378 void Redirector::ChannelInitialize(const std::string &channel, const NameValuePairs ¶meters, int propagation)
00379 {
00380 if (channel.empty())
00381 {
00382 m_target = parameters.GetValueWithDefault("RedirectionTargetPointer", (BufferedTransformation*)NULL);
00383 m_passSignal = parameters.GetValueWithDefault("PassSignal", true);
00384 }
00385
00386 if (m_target && m_passSignal)
00387 m_target->ChannelInitialize(channel, parameters, propagation);
00388 }
00389
00390
00391
00392 ProxyFilter::ProxyFilter(BufferedTransformation *filter, unsigned int firstSize, unsigned int lastSize, BufferedTransformation *attachment)
00393 : FilterWithBufferedInput(firstSize, 1, lastSize, attachment), m_filter(filter), m_proxy(NULL)
00394 {
00395 if (m_filter.get())
00396 m_filter->Attach(m_proxy = new OutputProxy(*this, false));
00397 }
00398
00399 void ProxyFilter::IsolatedFlush(bool completeFlush)
00400 {
00401 if (m_filter.get())
00402 {
00403 bool passSignal = m_proxy->GetPassSignal();
00404 m_proxy->SetPassSignal(false);
00405 m_filter->Flush(completeFlush, -1);
00406 m_proxy->SetPassSignal(passSignal);
00407 }
00408 }
00409
00410 void ProxyFilter::SetFilter(Filter *filter)
00411 {
00412 bool passSignal = m_proxy ? m_proxy->GetPassSignal() : false;
00413 m_filter.reset(filter);
00414 if (filter)
00415 {
00416 std::auto_ptr<OutputProxy> temp(m_proxy = new OutputProxy(*this, passSignal));
00417 m_filter->TransferAllTo(*m_proxy);
00418 m_filter->Attach(temp.release());
00419 }
00420 else
00421 m_proxy=NULL;
00422 }
00423
00424 void ProxyFilter::NextPutMultiple(const byte *s, unsigned int len)
00425 {
00426 if (m_filter.get())
00427 m_filter->Put(s, len);
00428 }
00429
00430
00431
00432 unsigned int ArraySink::Put2(const byte *begin, unsigned int length, int messageEnd, bool blocking)
00433 {
00434 memcpy(m_buf+m_total, begin, STDMIN(length, SaturatingSubtract(m_size, m_total)));
00435 m_total += length;
00436 return 0;
00437 }
00438
00439 byte * ArraySink::CreatePutSpace(unsigned int &size)
00440 {
00441 size = m_size - m_total;
00442 return m_buf + m_total;
00443 }
00444
00445 void ArraySink::IsolatedInitialize(const NameValuePairs ¶meters)
00446 {
00447 ByteArrayParameter array;
00448 if (!parameters.GetValue(Name::OutputBuffer(), array))
00449 throw InvalidArgument("ArraySink: missing OutputBuffer argument");
00450 m_buf = array.begin();
00451 m_size = array.size();
00452 m_total = 0;
00453 }
00454
00455 unsigned int ArrayXorSink::Put2(const byte *begin, unsigned int length, int messageEnd, bool blocking)
00456 {
00457 xorbuf(m_buf+m_total, begin, STDMIN(length, SaturatingSubtract(m_size, m_total)));
00458 m_total += length;
00459 return 0;
00460 }
00461
00462
00463
00464 unsigned int StreamTransformationFilter::LastBlockSize(StreamTransformation &c, BlockPaddingScheme padding)
00465 {
00466 if (c.MinLastBlockSize() > 0)
00467 return c.MinLastBlockSize();
00468 else if (c.MandatoryBlockSize() > 1 && !c.IsForwardTransformation() && padding != NO_PADDING && padding != ZEROS_PADDING)
00469 return c.MandatoryBlockSize();
00470 else
00471 return 0;
00472 }
00473
00474 StreamTransformationFilter::StreamTransformationFilter(StreamTransformation &c, BufferedTransformation *attachment, BlockPaddingScheme padding)
00475 : FilterWithBufferedInput(0, c.MandatoryBlockSize(), LastBlockSize(c, padding), attachment)
00476 , m_cipher(c)
00477 {
00478 assert(c.MinLastBlockSize() == 0 || c.MinLastBlockSize() > c.MandatoryBlockSize());
00479
00480 bool isBlockCipher = (c.MandatoryBlockSize() > 1 && c.MinLastBlockSize() == 0);
00481
00482 if (padding == DEFAULT_PADDING)
00483 {
00484 if (isBlockCipher)
00485 m_padding = PKCS_PADDING;
00486 else
00487 m_padding = NO_PADDING;
00488 }
00489 else
00490 m_padding = padding;
00491
00492 if (!isBlockCipher && (m_padding == PKCS_PADDING || m_padding == ONE_AND_ZEROS_PADDING))
00493 throw InvalidArgument("StreamTransformationFilter: PKCS_PADDING and ONE_AND_ZEROS_PADDING cannot be used with " + c.AlgorithmName());
00494 }
00495
00496 void StreamTransformationFilter::FirstPut(const byte *inString)
00497 {
00498 m_optimalBufferSize = m_cipher.OptimalBlockSize();
00499 m_optimalBufferSize = STDMAX(m_optimalBufferSize, RoundDownToMultipleOf(4096U, m_optimalBufferSize));
00500 }
00501
00502 void StreamTransformationFilter::NextPutMultiple(const byte *inString, unsigned int length)
00503 {
00504 if (!length)
00505 return;
00506
00507 unsigned int s = m_cipher.MandatoryBlockSize();
00508
00509 do
00510 {
00511 unsigned int len = m_optimalBufferSize;
00512 byte *space = HelpCreatePutSpace(*AttachedTransformation(), NULL_CHANNEL, s, length, len);
00513 if (len < length)
00514 {
00515 if (len == m_optimalBufferSize)
00516 len -= m_cipher.GetOptimalBlockSizeUsed();
00517 len = RoundDownToMultipleOf(len, s);
00518 }
00519 else
00520 len = length;
00521 m_cipher.ProcessString(space, inString, len);
00522 AttachedTransformation()->PutModifiable(space, len);
00523 inString += len;
00524 length -= len;
00525 }
00526 while (length > 0);
00527 }
00528
00529 void StreamTransformationFilter::NextPutModifiable(byte *inString, unsigned int length)
00530 {
00531 m_cipher.ProcessString(inString, length);
00532 AttachedTransformation()->PutModifiable(inString, length);
00533 }
00534
00535 void StreamTransformationFilter::LastPut(const byte *inString, unsigned int length)
00536 {
00537 byte *space = NULL;
00538
00539 switch (m_padding)
00540 {
00541 case NO_PADDING:
00542 case ZEROS_PADDING:
00543 if (length > 0)
00544 {
00545 unsigned int minLastBlockSize = m_cipher.MinLastBlockSize();
00546 bool isForwardTransformation = m_cipher.IsForwardTransformation();
00547
00548 if (isForwardTransformation && m_padding == ZEROS_PADDING && (minLastBlockSize == 0 || length < minLastBlockSize))
00549 {
00550
00551 unsigned int blockSize = STDMAX(minLastBlockSize, m_cipher.MandatoryBlockSize());
00552 space = HelpCreatePutSpace(*AttachedTransformation(), NULL_CHANNEL, blockSize);
00553 memcpy(space, inString, length);
00554 memset(space + length, 0, blockSize - length);
00555 m_cipher.ProcessLastBlock(space, space, blockSize);
00556 AttachedTransformation()->Put(space, blockSize);
00557 }
00558 else
00559 {
00560 if (minLastBlockSize == 0)
00561 {
00562 if (isForwardTransformation)
00563 throw InvalidDataFormat("StreamTransformationFilter: plaintext length is not a multiple of block size and NO_PADDING is specified");
00564 else
00565 throw InvalidCiphertext("StreamTransformationFilter: ciphertext length is not a multiple of block size");
00566 }
00567
00568 space = HelpCreatePutSpace(*AttachedTransformation(), NULL_CHANNEL, length, m_optimalBufferSize);
00569 m_cipher.ProcessLastBlock(space, inString, length);
00570 AttachedTransformation()->Put(space, length);
00571 }
00572 }
00573 break;
00574
00575 case PKCS_PADDING:
00576 case ONE_AND_ZEROS_PADDING:
00577 unsigned int s;
00578 s = m_cipher.MandatoryBlockSize();
00579 assert(s > 1);
00580 space = HelpCreatePutSpace(*AttachedTransformation(), NULL_CHANNEL, s, m_optimalBufferSize);
00581 if (m_cipher.IsForwardTransformation())
00582 {
00583 assert(length < s);
00584 memcpy(space, inString, length);
00585 if (m_padding == PKCS_PADDING)
00586 {
00587 assert(s < 256);
00588 byte pad = s-length;
00589 memset(space+length, pad, s-length);
00590 }
00591 else
00592 {
00593 space[length] = 1;
00594 memset(space+length+1, 0, s-length-1);
00595 }
00596 m_cipher.ProcessData(space, space, s);
00597 AttachedTransformation()->Put(space, s);
00598 }
00599 else
00600 {
00601 if (length != s)
00602 throw InvalidCiphertext("StreamTransformationFilter: ciphertext length is not a multiple of block size");
00603 m_cipher.ProcessData(space, inString, s);
00604 if (m_padding == PKCS_PADDING)
00605 {
00606 byte pad = space[s-1];
00607 if (pad < 1 || pad > s || std::find_if(space+s-pad, space+s, std::bind2nd(std::not_equal_to<byte>(), pad)) != space+s)
00608 throw InvalidCiphertext("StreamTransformationFilter: invalid PKCS #7 block padding found");
00609 length = s-pad;
00610 }
00611 else
00612 {
00613 while (length > 1 && space[length-1] == '\0')
00614 --length;
00615 if (space[--length] != '\1')
00616 throw InvalidCiphertext("StreamTransformationFilter: invalid ones-and-zeros padding found");
00617 }
00618 AttachedTransformation()->Put(space, length);
00619 }
00620 break;
00621
00622 default:
00623 assert(false);
00624 }
00625 }
00626
00627
00628
00629 void HashFilter::IsolatedInitialize(const NameValuePairs ¶meters)
00630 {
00631 m_putMessage = parameters.GetValueWithDefault(Name::PutMessage(), false);
00632 m_hashModule.Restart();
00633 }
00634
00635 unsigned int HashFilter::Put2(const byte *inString, unsigned int length, int messageEnd, bool blocking)
00636 {
00637 FILTER_BEGIN;
00638 m_hashModule.Update(inString, length);
00639 if (m_putMessage)
00640 FILTER_OUTPUT(1, inString, length, 0);
00641 if (messageEnd)
00642 {
00643 {
00644 unsigned int size, digestSize = m_hashModule.DigestSize();
00645 m_space = HelpCreatePutSpace(*AttachedTransformation(), NULL_CHANNEL, digestSize, digestSize, size = digestSize);
00646 m_hashModule.Final(m_space);
00647 }
00648 FILTER_OUTPUT(2, m_space, m_hashModule.DigestSize(), messageEnd);
00649 }
00650 FILTER_END_NO_MESSAGE_END;
00651 }
00652
00653
00654
00655 HashVerificationFilter::HashVerificationFilter(HashTransformation &hm, BufferedTransformation *attachment, word32 flags)
00656 : FilterWithBufferedInput(attachment)
00657 , m_hashModule(hm)
00658 {
00659 IsolatedInitialize(MakeParameters(Name::HashVerificationFilterFlags(), flags));
00660 }
00661
00662 void HashVerificationFilter::InitializeDerivedAndReturnNewSizes(const NameValuePairs ¶meters, unsigned int &firstSize, unsigned int &blockSize, unsigned int &lastSize)
00663 {
00664 m_flags = parameters.GetValueWithDefault(Name::HashVerificationFilterFlags(), (word32)DEFAULT_FLAGS);
00665 m_hashModule.Restart();
00666 unsigned int size = m_hashModule.DigestSize();
00667 m_verified = false;
00668 firstSize = m_flags & HASH_AT_BEGIN ? size : 0;
00669 blockSize = 1;
00670 lastSize = m_flags & HASH_AT_BEGIN ? 0 : size;
00671 }
00672
00673 void HashVerificationFilter::FirstPut(const byte *inString)
00674 {
00675 if (m_flags & HASH_AT_BEGIN)
00676 {
00677 m_expectedHash.New(m_hashModule.DigestSize());
00678 memcpy(m_expectedHash, inString, m_expectedHash.size());
00679 if (m_flags & PUT_HASH)
00680 AttachedTransformation()->Put(inString, m_expectedHash.size());
00681 }
00682 }
00683
00684 void HashVerificationFilter::NextPutMultiple(const byte *inString, unsigned int length)
00685 {
00686 m_hashModule.Update(inString, length);
00687 if (m_flags & PUT_MESSAGE)
00688 AttachedTransformation()->Put(inString, length);
00689 }
00690
00691 void HashVerificationFilter::LastPut(const byte *inString, unsigned int length)
00692 {
00693 if (m_flags & HASH_AT_BEGIN)
00694 {
00695 assert(length == 0);
00696 m_verified = m_hashModule.Verify(m_expectedHash);
00697 }
00698 else
00699 {
00700 m_verified = (length==m_hashModule.DigestSize() && m_hashModule.Verify(inString));
00701 if (m_flags & PUT_HASH)
00702 AttachedTransformation()->Put(inString, length);
00703 }
00704
00705 if (m_flags & PUT_RESULT)
00706 AttachedTransformation()->Put(m_verified);
00707
00708 if ((m_flags & THROW_EXCEPTION) && !m_verified)
00709 throw HashVerificationFailed();
00710 }
00711
00712
00713
00714 void SignerFilter::IsolatedInitialize(const NameValuePairs ¶meters)
00715 {
00716 m_putMessage = parameters.GetValueWithDefault(Name::PutMessage(), false);
00717 m_messageAccumulator.reset(m_signer.NewSignatureAccumulator());
00718 }
00719
00720 unsigned int SignerFilter::Put2(const byte *inString, unsigned int length, int messageEnd, bool blocking)
00721 {
00722 FILTER_BEGIN;
00723 m_messageAccumulator->Update(inString, length);
00724 if (m_putMessage)
00725 FILTER_OUTPUT(1, inString, length, 0);
00726 if (messageEnd)
00727 {
00728 m_buf.New(m_signer.SignatureLength());
00729 m_signer.Sign(m_rng, m_messageAccumulator.release(), m_buf);
00730 FILTER_OUTPUT(2, m_buf, m_buf.size(), messageEnd);
00731 m_messageAccumulator.reset(m_signer.NewSignatureAccumulator());
00732 }
00733 FILTER_END_NO_MESSAGE_END;
00734 }
00735
00736 SignatureVerificationFilter::SignatureVerificationFilter(const PK_Verifier &verifier, BufferedTransformation *attachment, word32 flags)
00737 : FilterWithBufferedInput(attachment)
00738 , m_verifier(verifier)
00739 {
00740 IsolatedInitialize(MakeParameters(Name::SignatureVerificationFilterFlags(), flags));
00741 }
00742
00743 void SignatureVerificationFilter::InitializeDerivedAndReturnNewSizes(const NameValuePairs ¶meters, unsigned int &firstSize, unsigned int &blockSize, unsigned int &lastSize)
00744 {
00745 m_flags = parameters.GetValueWithDefault(Name::SignatureVerificationFilterFlags(), (word32)DEFAULT_FLAGS);
00746 m_messageAccumulator.reset(m_verifier.NewVerificationAccumulator());
00747 unsigned int size = m_verifier.SignatureLength();
00748 m_verified = false;
00749 firstSize = m_flags & SIGNATURE_AT_BEGIN ? size : 0;
00750 blockSize = 1;
00751 lastSize = m_flags & SIGNATURE_AT_BEGIN ? 0 : size;
00752 }
00753
00754 void SignatureVerificationFilter::FirstPut(const byte *inString)
00755 {
00756 if (m_flags & SIGNATURE_AT_BEGIN)
00757 {
00758 if (m_verifier.SignatureUpfrontForVerification())
00759 m_verifier.InitializeVerificationAccumulator(*m_messageAccumulator, inString);
00760 else
00761 {
00762 m_signature.New(m_verifier.SignatureLength());
00763 memcpy(m_signature, inString, m_signature.size());
00764 }
00765
00766 if (m_flags & PUT_SIGNATURE)
00767 AttachedTransformation()->Put(inString, m_signature.size());
00768 }
00769 else
00770 {
00771 assert(!m_verifier.SignatureUpfrontForVerification());
00772 }
00773 }
00774
00775 void SignatureVerificationFilter::NextPutMultiple(const byte *inString, unsigned int length)
00776 {
00777 m_messageAccumulator->Update(inString, length);
00778 if (m_flags & PUT_MESSAGE)
00779 AttachedTransformation()->Put(inString, length);
00780 }
00781
00782 void SignatureVerificationFilter::LastPut(const byte *inString, unsigned int length)
00783 {
00784 if (m_flags & SIGNATURE_AT_BEGIN)
00785 {
00786 assert(length == 0);
00787 m_verified = m_verifier.Verify(m_messageAccumulator.release(), m_signature);
00788 }
00789 else
00790 {
00791 m_verified = (length==m_verifier.SignatureLength() && m_verifier.Verify(m_messageAccumulator.release(), inString));
00792 if (m_flags & PUT_SIGNATURE)
00793 AttachedTransformation()->Put(inString, length);
00794 }
00795
00796 if (m_flags & PUT_RESULT)
00797 AttachedTransformation()->Put(m_verified);
00798
00799 if ((m_flags & THROW_EXCEPTION) && !m_verified)
00800 throw SignatureVerificationFailed();
00801 }
00802
00803
00804
00805 unsigned int Source::PumpAll2(bool blocking)
00806 {
00807
00808 unsigned long i = UINT_MAX;
00809 RETURN_IF_NONZERO(Pump2(i, blocking));
00810 unsigned int j = UINT_MAX;
00811 return PumpMessages2(j, blocking);
00812 }
00813
00814 bool Store::GetNextMessage()
00815 {
00816 if (!m_messageEnd && !AnyRetrievable())
00817 {
00818 m_messageEnd=true;
00819 return true;
00820 }
00821 else
00822 return false;
00823 }
00824
00825 unsigned int Store::CopyMessagesTo(BufferedTransformation &target, unsigned int count, const std::string &channel) const
00826 {
00827 if (m_messageEnd || count == 0)
00828 return 0;
00829 else
00830 {
00831 CopyTo(target, ULONG_MAX, channel);
00832 if (GetAutoSignalPropagation())
00833 target.ChannelMessageEnd(channel, GetAutoSignalPropagation()-1);
00834 return 1;
00835 }
00836 }
00837
00838 void StringStore::StoreInitialize(const NameValuePairs ¶meters)
00839 {
00840 ConstByteArrayParameter array;
00841 if (!parameters.GetValue(Name::InputBuffer(), array))
00842 throw InvalidArgument("StringStore: missing InputBuffer argument");
00843 m_store = array.begin();
00844 m_length = array.size();
00845 m_count = 0;
00846 }
00847
00848 unsigned int StringStore::TransferTo2(BufferedTransformation &target, unsigned long &transferBytes, const std::string &channel, bool blocking)
00849 {
00850 unsigned long position = 0;
00851 unsigned int blockedBytes = CopyRangeTo2(target, position, transferBytes, channel, blocking);
00852 m_count += position;
00853 transferBytes = position;
00854 return blockedBytes;
00855 }
00856
00857 unsigned int StringStore::CopyRangeTo2(BufferedTransformation &target, unsigned long &begin, unsigned long end, const std::string &channel, bool blocking) const
00858 {
00859 unsigned int i = (unsigned int)STDMIN((unsigned long)m_count+begin, (unsigned long)m_length);
00860 unsigned int len = (unsigned int)STDMIN((unsigned long)m_length-i, end-begin);
00861 unsigned int blockedBytes = target.ChannelPut2(channel, m_store+i, len, 0, blocking);
00862 if (!blockedBytes)
00863 begin += len;
00864 return blockedBytes;
00865 }
00866
00867 unsigned int RandomNumberStore::TransferTo2(BufferedTransformation &target, unsigned long &transferBytes, const std::string &channel, bool blocking)
00868 {
00869 if (!blocking)
00870 throw NotImplemented("RandomNumberStore: nonblocking transfer is not implemented by this object");
00871
00872 unsigned long transferMax = transferBytes;
00873 for (transferBytes = 0; transferBytes<transferMax && m_count < m_length; ++transferBytes, ++m_count)
00874 target.ChannelPut(channel, m_rng.GenerateByte());
00875 return 0;
00876 }
00877
00878 unsigned int NullStore::CopyRangeTo2(BufferedTransformation &target, unsigned long &begin, unsigned long end, const std::string &channel, bool blocking) const
00879 {
00880 static const byte nullBytes[128] = {0};
00881 while (begin < end)
00882 {
00883 unsigned int len = STDMIN(end-begin, 128UL);
00884 unsigned int blockedBytes = target.ChannelPut2(channel, nullBytes, len, 0, blocking);
00885 if (blockedBytes)
00886 return blockedBytes;
00887 begin += len;
00888 }
00889 return 0;
00890 }
00891
00892 unsigned int NullStore::TransferTo2(BufferedTransformation &target, unsigned long &transferBytes, const std::string &channel, bool blocking)
00893 {
00894 unsigned long begin = 0;
00895 unsigned int blockedBytes = NullStore::CopyRangeTo2(target, begin, transferBytes, channel, blocking);
00896 transferBytes = begin;
00897 m_size -= begin;
00898 return blockedBytes;
00899 }
00900
00901 NAMESPACE_END
00902
00903 #endif