Crypto++ 8.9 Free C++ class library of cryptographic schemes

filters.cpp
1 // filters.cpp - originally written and placed in the public domain by Wei Dai
2
3 #include "pch.h"
4 #include "config.h"
5
6 #if CRYPTOPP_MSC_VERSION
7 # pragma warning(disable: 4189 4355)
8 #endif
9
10 #ifndef CRYPTOPP_IMPORTS
11
12 #include "filters.h"
13 #include "mqueue.h"
14 #include "fltrimpl.h"
15 #include "argnames.h"
16 #include "smartptr.h"
17 #include "stdcpp.h"
18 #include "misc.h"
19
20 NAMESPACE_BEGIN(CryptoPP)
21
22 Filter::Filter(BufferedTransformation *attachment)
23 : m_attachment(attachment), m_inputPosition(0), m_continueAt(0)
24 {
25 }
26
27 BufferedTransformation * Filter::NewDefaultAttachment() const
28 {
29 return new MessageQueue;
30 }
31
32 BufferedTransformation * Filter::AttachedTransformation()
33 {
34 if (m_attachment.get() == NULLPTR)
35 m_attachment.reset(NewDefaultAttachment());
36 return m_attachment.get();
37 }
38
39 const BufferedTransformation *Filter::AttachedTransformation() const
40 {
41 if (m_attachment.get() == NULLPTR)
42 const_cast<Filter *>(this)->m_attachment.reset(NewDefaultAttachment());
43 return m_attachment.get();
44 }
45
46 void Filter::Detach(BufferedTransformation *newOut)
47 {
48 m_attachment.reset(newOut);
49 }
50
51 void Filter::Insert(Filter *filter)
52 {
53 filter->m_attachment.reset(m_attachment.release());
54 m_attachment.reset(filter);
55 }
56
57 size_t Filter::CopyRangeTo2(BufferedTransformation &target, lword &begin, lword end, const std::string &channel, bool blocking) const
58 {
59 return AttachedTransformation()->CopyRangeTo2(target, begin, end, channel, blocking);
60 }
61
62 size_t Filter::TransferTo2(BufferedTransformation &target, lword &transferBytes, const std::string &channel, bool blocking)
63 {
64 return AttachedTransformation()->TransferTo2(target, transferBytes, channel, blocking);
65 }
66
67 void Filter::Initialize(const NameValuePairs &parameters, int propagation)
68 {
69 m_inputPosition = m_continueAt = 0;
70 IsolatedInitialize(parameters);
71 PropagateInitialize(parameters, propagation);
72 }
73
74 bool Filter::Flush(bool hardFlush, int propagation, bool blocking)
75 {
76 switch (m_continueAt)
77 {
78 case 0:
79 if (IsolatedFlush(hardFlush, blocking))
80 return true;
81 // fall through
82 case 1:
83 if (OutputFlush(1, hardFlush, propagation, blocking))
84 return true;
85 // fall through
86 default: ;
87 }
88 return false;
89 }
90
91 bool Filter::MessageSeriesEnd(int propagation, bool blocking)
92 {
93 switch (m_continueAt)
94 {
95 case 0:
96 if (IsolatedMessageSeriesEnd(blocking))
97 return true;
98 // fall through
99 case 1:
100 if (ShouldPropagateMessageSeriesEnd() && OutputMessageSeriesEnd(1, propagation, blocking))
101 return true;
102 // fall through
103 default: ;
104 }
105 return false;
106 }
107
108 void Filter::PropagateInitialize(const NameValuePairs &parameters, int propagation)
109 {
110 if (propagation)
111 AttachedTransformation()->Initialize(parameters, propagation-1);
112 }
113
114 size_t Filter::OutputModifiable(int outputSite, byte *inString, size_t length, int messageEnd, bool blocking, const std::string &channel)
115 {
116 if (messageEnd)
117 messageEnd--;
118 size_t result = AttachedTransformation()->ChannelPutModifiable2(channel, inString, length, messageEnd, blocking);
119 m_continueAt = result ? outputSite : 0;
120 return result;
121 }
122
123 size_t Filter::Output(int outputSite, const byte *inString, size_t length, int messageEnd, bool blocking, const std::string &channel)
124 {
125 if (messageEnd)
126 messageEnd--;
127 size_t result = AttachedTransformation()->ChannelPut2(channel, inString, length, messageEnd, blocking);
128 m_continueAt = result ? outputSite : 0;
129 return result;
130 }
131
132 bool Filter::OutputFlush(int outputSite, bool hardFlush, int propagation, bool blocking, const std::string &channel)
133 {
134 if (propagation && AttachedTransformation()->ChannelFlush(channel, hardFlush, propagation-1, blocking))
135 {
136 m_continueAt = outputSite;
137 return true;
138 }
139 m_continueAt = 0;
140 return false;
141 }
142
143 bool Filter::OutputMessageSeriesEnd(int outputSite, int propagation, bool blocking, const std::string &channel)
144 {
145 if (propagation && AttachedTransformation()->ChannelMessageSeriesEnd(channel, propagation-1, blocking))
146 {
147 m_continueAt = outputSite;
148 return true;
149 }
150 m_continueAt = 0;
151 return false;
152 }
153
154 // *************************************************************
155
156 void MeterFilter::ResetMeter()
157 {
158 m_currentMessageBytes = m_totalBytes = m_currentSeriesMessages = m_totalMessages = m_totalMessageSeries = 0;
159 m_rangesToSkip.clear();
160 }
161
162 void MeterFilter::AddRangeToSkip(unsigned int message, lword position, lword size, bool sortNow)
163 {
164 MessageRange r = {message, position, size};
165 m_rangesToSkip.push_back(r);
166 if (sortNow)
167 std::sort(m_rangesToSkip.begin(), m_rangesToSkip.end());
168 }
169
170 size_t MeterFilter::PutMaybeModifiable(byte *begin, size_t length, int messageEnd, bool blocking, bool modifiable)
171 {
172 if (!m_transparent)
173 return 0;
174
175 size_t t;
176 FILTER_BEGIN;
177
178 m_begin = begin;
179 m_length = length;
180
181 while (m_length > 0 || messageEnd)
182 {
183 if (m_length > 0 && !m_rangesToSkip.empty() && m_rangesToSkip.front().message == m_totalMessages && m_currentMessageBytes + m_length > m_rangesToSkip.front().position)
184 {
185 FILTER_OUTPUT_MAYBE_MODIFIABLE(1, m_begin, t = (size_t)SaturatingSubtract(m_rangesToSkip.front().position, m_currentMessageBytes), false, modifiable);
186
187 CRYPTOPP_ASSERT(t < m_length);
188 m_begin = PtrAdd(m_begin, t);
189 m_length -= t;
190 m_currentMessageBytes += t;
191 m_totalBytes += t;
192
193 if (m_currentMessageBytes + m_length < m_rangesToSkip.front().position + m_rangesToSkip.front().size)
194 t = m_length;
195 else
196 {
197 t = (size_t)SaturatingSubtract(m_rangesToSkip.front().position + m_rangesToSkip.front().size, m_currentMessageBytes);
198 CRYPTOPP_ASSERT(t <= m_length);
199 m_rangesToSkip.pop_front();
200 }
201
202 m_begin = PtrAdd(m_begin, t);
203 m_length -= t;
204 m_currentMessageBytes += t;
205 m_totalBytes += t;
206 }
207 else
208 {
209 FILTER_OUTPUT_MAYBE_MODIFIABLE(2, m_begin, m_length, messageEnd, modifiable);
210
211 m_currentMessageBytes += m_length;
212 m_totalBytes += m_length;
213 m_length = 0;
214
215 if (messageEnd)
216 {
217 m_currentMessageBytes = 0;
218 m_currentSeriesMessages++;
219 m_totalMessages++;
220 messageEnd = false;
221 }
222 }
223 }
224
225 FILTER_END_NO_MESSAGE_END;
226 }
227
228 size_t MeterFilter::Put2(const byte *begin, size_t length, int messageEnd, bool blocking)
229 {
230 return PutMaybeModifiable(const_cast<byte *>(begin), length, messageEnd, blocking, false);
231 }
232
233 size_t MeterFilter::PutModifiable2(byte *begin, size_t length, int messageEnd, bool blocking)
234 {
235 return PutMaybeModifiable(begin, length, messageEnd, blocking, true);
236 }
237
238 bool MeterFilter::IsolatedMessageSeriesEnd(bool blocking)
239 {
240 CRYPTOPP_UNUSED(blocking);
241 m_currentMessageBytes = 0;
242 m_currentSeriesMessages = 0;
243 m_totalMessageSeries++;
244 return false;
245 }
246
247 // *************************************************************
248
249 void FilterWithBufferedInput::BlockQueue::ResetQueue(size_t blockSize, size_t maxBlocks)
250 {
251 m_buffer.New(blockSize * maxBlocks);
252 m_blockSize = blockSize;
253 m_maxBlocks = maxBlocks;
254 m_size = 0;
255 m_begin = m_buffer;
256 }
257
258 byte *FilterWithBufferedInput::BlockQueue::GetBlock()
259 {
260 if (m_size >= m_blockSize)
261 {
262 byte *ptr = m_begin;
263 if ((m_begin = PtrAdd(m_begin, m_blockSize)) == m_buffer.end())
264 m_begin = m_buffer;
265 m_size -= m_blockSize;
266 return ptr;
267 }
268 else
269 return NULLPTR;
270 }
271
272 byte *FilterWithBufferedInput::BlockQueue::GetContigousBlocks(size_t &numberOfBytes)
273 {
274 numberOfBytes = STDMIN(numberOfBytes, STDMIN<size_t>(PtrDiff(m_buffer.end(), m_begin), m_size));
275 byte *ptr = m_begin;
276 m_begin = PtrAdd(m_begin, numberOfBytes);
277 m_size -= numberOfBytes;
278 if (m_size == 0 || m_begin == m_buffer.end())
279 m_begin = m_buffer;
280 return ptr;
281 }
282
283 size_t FilterWithBufferedInput::BlockQueue::GetAll(byte *outString)
284 {
285 // Avoid passing NULL pointer to memcpy
286 if (!outString) return 0;
287
288 size_t size = m_size;
289 size_t numberOfBytes = m_maxBlocks*m_blockSize;
290 const byte *ptr = GetContigousBlocks(numberOfBytes);
291 std::memcpy(outString, ptr, numberOfBytes);
292 std::memcpy(PtrAdd(outString, numberOfBytes), m_begin, m_size);
293 m_size = 0;
294 return size;
295 }
296
297 void FilterWithBufferedInput::BlockQueue::Put(const byte *inString, size_t length)
298 {
299 // Avoid passing NULL pointer to memcpy
300 if (!inString || !length) return;
301
302 CRYPTOPP_ASSERT(m_size + length <= m_buffer.size());
303 byte *end = (m_size < static_cast<size_t>(PtrDiff(m_buffer.end(), m_begin)) ?
304 PtrAdd(m_begin, m_size) : PtrAdd(m_begin, m_size - m_buffer.size()));
305 size_t len = STDMIN(length, size_t(m_buffer.end()-end));
306 std::memcpy(end, inString, len);
307 if (len < length)
308 std::memcpy(m_buffer, PtrAdd(inString, len), length-len);
309 m_size += length;
310 }
311
312 FilterWithBufferedInput::FilterWithBufferedInput(BufferedTransformation *attachment)
313 : Filter(attachment), m_firstSize(SIZE_MAX), m_blockSize(0), m_lastSize(SIZE_MAX), m_firstInputDone(false)
314 {
315 }
316
317 FilterWithBufferedInput::FilterWithBufferedInput(size_t firstSize, size_t blockSize, size_t lastSize, BufferedTransformation *attachment)
318 : Filter(attachment), m_firstSize(firstSize), m_blockSize(blockSize), m_lastSize(lastSize), m_firstInputDone(false)
319 {
320 if (m_firstSize == SIZE_MAX || m_blockSize < 1 || m_lastSize == SIZE_MAX)
321 throw InvalidArgument("FilterWithBufferedInput: invalid buffer size");
322
323 m_queue.ResetQueue(1, m_firstSize);
324 }
325
326 void FilterWithBufferedInput::IsolatedInitialize(const NameValuePairs &parameters)
327 {
328 InitializeDerivedAndReturnNewSizes(parameters, m_firstSize, m_blockSize, m_lastSize);
329 if (m_firstSize == SIZE_MAX || m_blockSize < 1 || m_lastSize == SIZE_MAX)
330 throw InvalidArgument("FilterWithBufferedInput: invalid buffer size");
331 m_queue.ResetQueue(1, m_firstSize);
332 m_firstInputDone = false;
333 }
334
335 bool FilterWithBufferedInput::IsolatedFlush(bool hardFlush, bool blocking)
336 {
337 if (!blocking)
338 throw BlockingInputOnly("FilterWithBufferedInput");
339
340 if (hardFlush)
341 ForceNextPut();
342 FlushDerived();
343
344 return false;
345 }
346
347 size_t FilterWithBufferedInput::PutMaybeModifiable(byte *inString, size_t length, int messageEnd, bool blocking, bool modifiable)
348 {
349 if (!blocking)
350 throw BlockingInputOnly("FilterWithBufferedInput");
351
352 if (length != 0)
353 {
354 size_t newLength = m_queue.CurrentSize() + length;
355
356 if (!m_firstInputDone && newLength >= m_firstSize)
357 {
358 size_t len = m_firstSize - m_queue.CurrentSize();
359 m_queue.Put(inString, len);
360 FirstPut(m_queue.GetContigousBlocks(m_firstSize));
361 CRYPTOPP_ASSERT(m_queue.CurrentSize() == 0);
362 m_queue.ResetQueue(m_blockSize, (2*m_blockSize+m_lastSize-2)/m_blockSize);
363
364 inString = PtrAdd(inString, len);
365 newLength -= m_firstSize;
366 m_firstInputDone = true;
367 }
368
369 if (m_firstInputDone)
370 {
371 if (m_blockSize == 1)
372 {
373 while (newLength > m_lastSize && m_queue.CurrentSize() > 0)
374 {
375 size_t len = newLength - m_lastSize;
376 byte *ptr = m_queue.GetContigousBlocks(len);
377 NextPutModifiable(ptr, len);
378 newLength -= len;
379 }
380
381 if (newLength > m_lastSize)
382 {
383 size_t len = newLength - m_lastSize;
384 NextPutMaybeModifiable(inString, len, modifiable);
385 inString = PtrAdd(inString, len);
386 newLength -= len;
387 }
388 }
389 else
390 {
391 while (newLength >= m_blockSize + m_lastSize && m_queue.CurrentSize() >= m_blockSize)
392 {
393 NextPutModifiable(m_queue.GetBlock(), m_blockSize);
394 newLength -= m_blockSize;
395 }
396
397 if (newLength >= m_blockSize + m_lastSize && m_queue.CurrentSize() > 0)
398 {
399 CRYPTOPP_ASSERT(m_queue.CurrentSize() < m_blockSize);
400 size_t len = m_blockSize - m_queue.CurrentSize();
401 m_queue.Put(inString, len);
402 inString = PtrAdd(inString, len);
403 NextPutModifiable(m_queue.GetBlock(), m_blockSize);
404 newLength -= m_blockSize;
405 }
406
407 if (newLength >= m_blockSize + m_lastSize)
408 {
409 size_t len = RoundDownToMultipleOf(newLength - m_lastSize, m_blockSize);
410 NextPutMaybeModifiable(inString, len, modifiable);
411 inString = PtrAdd(inString, len);
412 newLength -= len;
413 }
414 }
415 }
416
417 m_queue.Put(inString, newLength - m_queue.CurrentSize());
418 }
419
420 if (messageEnd)
421 {
422 if (!m_firstInputDone && m_firstSize==0)
423 FirstPut(NULLPTR);
424
425 SecByteBlock temp(m_queue.CurrentSize());
426 m_queue.GetAll(temp);
427 LastPut(temp, temp.size());
428
429 m_firstInputDone = false;
430 m_queue.ResetQueue(1, m_firstSize);
431
432 // Cast to void to suppress Coverity finding
433 (void)Output(1, NULLPTR, 0, messageEnd, blocking);
434 }
435 return 0;
436 }
437
438 void FilterWithBufferedInput::ForceNextPut()
439 {
440 if (!m_firstInputDone)
441 return;
442
443 if (m_blockSize > 1)
444 {
445 while (m_queue.CurrentSize() >= m_blockSize)
446 NextPutModifiable(m_queue.GetBlock(), m_blockSize);
447 }
448 else
449 {
450 size_t len;
451 while ((len = m_queue.CurrentSize()) > 0)
452 NextPutModifiable(m_queue.GetContigousBlocks(len), len);
453 }
454 }
455
456 void FilterWithBufferedInput::NextPutMultiple(const byte *inString, size_t length)
457 {
458 CRYPTOPP_ASSERT(m_blockSize > 1); // m_blockSize = 1 should always override this function
459 while (length > 0)
460 {
461 CRYPTOPP_ASSERT(length >= m_blockSize);
462 NextPutSingle(inString);
463 inString = PtrAdd(inString, m_blockSize);
464 length -= m_blockSize;
465 }
466 }
467
468 // *************************************************************
469
470 void Redirector::Initialize(const NameValuePairs &parameters, int propagation)
471 {
472 m_target = parameters.GetValueWithDefault("RedirectionTargetPointer", (BufferedTransformation*)NULLPTR);
473 m_behavior = parameters.GetIntValueWithDefault("RedirectionBehavior", PASS_EVERYTHING);
474
475 if (m_target && GetPassSignals())
476 m_target->Initialize(parameters, propagation);
477 }
478
479 // *************************************************************
480
481 ProxyFilter::ProxyFilter(BufferedTransformation *filter, size_t firstSize, size_t lastSize, BufferedTransformation *attachment)
482 : FilterWithBufferedInput(firstSize, 1, lastSize, attachment), m_filter(filter)
483 {
484 if (m_filter.get())
485 m_filter->Attach(new OutputProxy(*this, false));
486 }
487
488 bool ProxyFilter::IsolatedFlush(bool hardFlush, bool blocking)
489 {
490 return m_filter.get() ? m_filter->Flush(hardFlush, -1, blocking) : false;
491 }
492
493 void ProxyFilter::SetFilter(Filter *filter)
494 {
495 m_filter.reset(filter);
496 if (filter)
497 {
498 OutputProxy *proxy;
499 member_ptr<OutputProxy> temp(proxy = new OutputProxy(*this, false));
500 m_filter->TransferAllTo(*proxy);
501 m_filter->Attach(temp.release());
502 }
503 }
504
505 void ProxyFilter::NextPutMultiple(const byte *s, size_t len)
506 {
507 if (m_filter.get())
508 m_filter->Put(s, len);
509 }
510
511 void ProxyFilter::NextPutModifiable(byte *s, size_t len)
512 {
513 if (m_filter.get())
514 m_filter->PutModifiable(s, len);
515 }
516
517 // *************************************************************
518
519 void RandomNumberSink::IsolatedInitialize(const NameValuePairs &parameters)
520 {
521 parameters.GetRequiredParameter("RandomNumberSink", "RandomNumberGeneratorPointer", m_rng);
522 }
523
524 size_t RandomNumberSink::Put2(const byte *begin, size_t length, int messageEnd, bool blocking)
525 {
526 CRYPTOPP_UNUSED(messageEnd); CRYPTOPP_UNUSED(blocking);
527 m_rng->IncorporateEntropy(begin, length);
528 return 0;
529 }
530
531 size_t ArraySink::Put2(const byte *begin, size_t length, int messageEnd, bool blocking)
532 {
533 CRYPTOPP_UNUSED(messageEnd); CRYPTOPP_UNUSED(blocking);
534
535 // Avoid passing NULL pointer to memcpy. Using std::memmove due to
536 // Valgrind finding on overlapping buffers.
537 size_t copied = 0;
538 if (m_buf && begin)
539 {
540 copied = STDMIN(length, SaturatingSubtract(m_size, m_total));
541 std::memmove(PtrAdd(m_buf, m_total), begin, copied);
542 }
543 m_total += copied;
544 return length - copied;
545 }
546
547 byte * ArraySink::CreatePutSpace(size_t &size)
548 {
549 size = SaturatingSubtract(m_size, m_total);
550 return PtrAdd(m_buf, m_total);
551 }
552
553 void ArraySink::IsolatedInitialize(const NameValuePairs &parameters)
554 {
555 ByteArrayParameter array;
556 if (!parameters.GetValue(Name::OutputBuffer(), array))
557 throw InvalidArgument("ArraySink: missing OutputBuffer argument");
558 m_buf = array.begin();
559 m_size = array.size();
560 }
561
562 size_t ArrayXorSink::Put2(const byte *begin, size_t length, int messageEnd, bool blocking)
563 {
564 CRYPTOPP_UNUSED(messageEnd); CRYPTOPP_UNUSED(blocking);
565
566 // Avoid passing NULL pointer to xorbuf
567 size_t copied = 0;
568 if (m_buf && begin)
569 {
570 copied = STDMIN(length, SaturatingSubtract(m_size, m_total));
571 xorbuf(PtrAdd(m_buf, m_total), begin, copied);
572 }
573 m_total += copied;
574 return length - copied;
575 }
576
577 // *************************************************************
578
579 StreamTransformationFilter::StreamTransformationFilter(StreamTransformation &c, BufferedTransformation *attachment, BlockPaddingScheme padding)
580 : FilterWithBufferedInput(attachment), m_cipher(c), m_padding(DEFAULT_PADDING)
581 {
582 CRYPTOPP_ASSERT(c.MinLastBlockSize() == 0 || c.MinLastBlockSize() > c.MandatoryBlockSize());
583
584 const bool authenticatedFilter = dynamic_cast<AuthenticatedSymmetricCipher *>(&c) != NULLPTR;
585 if (authenticatedFilter)
586 throw InvalidArgument("StreamTransformationFilter: please use AuthenticatedEncryptionFilter and AuthenticatedDecryptionFilter for AuthenticatedSymmetricCipher");
587
588 // InitializeDerivedAndReturnNewSizes may override some of these
589 m_mandatoryBlockSize = m_cipher.MandatoryBlockSize();
590 m_optimalBufferSize = m_cipher.OptimalBlockSize();
591 m_isSpecial = m_cipher.IsLastBlockSpecial() && m_mandatoryBlockSize > 1;
592 m_reservedBufferSize = STDMAX(2*m_mandatoryBlockSize, m_optimalBufferSize);
593
594 FilterWithBufferedInput::IsolatedInitialize(
595 MakeParameters
596 (Name::BlockPaddingScheme(), padding));
597 }
598
599 StreamTransformationFilter::StreamTransformationFilter(StreamTransformation &c, BufferedTransformation *attachment, BlockPaddingScheme padding, bool authenticated)
600 : FilterWithBufferedInput(attachment), m_cipher(c), m_padding(DEFAULT_PADDING)
601 {
602 const bool authenticatedFilter = dynamic_cast<AuthenticatedSymmetricCipher *>(&c) != NULLPTR;
603 if (!authenticatedFilter)
604 {
605 CRYPTOPP_ASSERT(c.MinLastBlockSize() == 0 || c.MinLastBlockSize() > c.MandatoryBlockSize());
606 }
607
608 if (authenticatedFilter && !authenticated)
609 throw InvalidArgument("StreamTransformationFilter: please use AuthenticatedEncryptionFilter and AuthenticatedDecryptionFilter for AuthenticatedSymmetricCipher");
610
611 // InitializeDerivedAndReturnNewSizes may override some of these
612 m_mandatoryBlockSize = m_cipher.MandatoryBlockSize();
613 m_optimalBufferSize = m_cipher.OptimalBlockSize();
614 m_isSpecial = m_cipher.IsLastBlockSpecial() && m_mandatoryBlockSize > 1;
615 m_reservedBufferSize = STDMAX(2*m_mandatoryBlockSize, m_optimalBufferSize);
616
617 FilterWithBufferedInput::IsolatedInitialize(
618 MakeParameters
619 (Name::BlockPaddingScheme(), padding));
620 }
621
622 size_t StreamTransformationFilter::LastBlockSize(StreamTransformation &c, BlockPaddingScheme padding)
623 {
624 if (c.MinLastBlockSize() > 0)
625 return c.MinLastBlockSize();
626 else if (c.MandatoryBlockSize() > 1 && !c.IsForwardTransformation() && padding != NO_PADDING && padding != ZEROS_PADDING)
627 return c.MandatoryBlockSize();
628
629 return 0;
630 }
631
632 void StreamTransformationFilter::InitializeDerivedAndReturnNewSizes(const NameValuePairs &parameters, size_t &firstSize, size_t &blockSize, size_t &lastSize)
633 {
634 BlockPaddingScheme padding = parameters.GetValueWithDefault(Name::BlockPaddingScheme(), DEFAULT_PADDING);
635 bool isBlockCipher = (m_mandatoryBlockSize > 1 && m_cipher.MinLastBlockSize() == 0);
636
637 if (padding == DEFAULT_PADDING)
638 m_padding = isBlockCipher ? PKCS_PADDING : NO_PADDING;
639 else
640 m_padding = padding;
641
642 if (!isBlockCipher)
643 {
644 if (m_padding == PKCS_PADDING)
645 throw InvalidArgument("StreamTransformationFilter: PKCS_PADDING cannot be used with " + m_cipher.AlgorithmName());
646 else if (m_padding == W3C_PADDING)
647 throw InvalidArgument("StreamTransformationFilter: W3C_PADDING cannot be used with " + m_cipher.AlgorithmName());
648 else if (m_padding == ONE_AND_ZEROS_PADDING)
649 throw InvalidArgument("StreamTransformationFilter: ONE_AND_ZEROS_PADDING cannot be used with " + m_cipher.AlgorithmName());
650 }
651
652 firstSize = 0;
653 blockSize = m_mandatoryBlockSize;
654 lastSize = LastBlockSize(m_cipher, m_padding);
655 }
656
657 void StreamTransformationFilter::FirstPut(const byte* inString)
658 {
659 CRYPTOPP_UNUSED(inString);
660 m_optimalBufferSize = STDMAX<unsigned int>(m_optimalBufferSize, RoundDownToMultipleOf(4096U, m_optimalBufferSize));
661 }
662
663 void StreamTransformationFilter::NextPutMultiple(const byte *inString, size_t length)
664 {
665 if (!length)
666 {return;}
667
668 const size_t s = m_cipher.MandatoryBlockSize();
669 do
670 {
671 size_t len = m_optimalBufferSize;
672 byte *space = HelpCreatePutSpace(*AttachedTransformation(), DEFAULT_CHANNEL, s, length, len);
673 if (len < length)
674 {
675 if (len == m_optimalBufferSize)
676 len -= m_cipher.GetOptimalBlockSizeUsed();
677 len = RoundDownToMultipleOf(len, s);
678 }
679 else
680 len = length;
681 m_cipher.ProcessString(space, inString, len);
682 AttachedTransformation()->PutModifiable(space, len);
683 inString = PtrAdd(inString, len);
684 length -= len;
685 }
686 while (length > 0);
687 }
688
689 void StreamTransformationFilter::NextPutModifiable(byte *inString, size_t length)
690 {
691 m_cipher.ProcessString(inString, length);
692 AttachedTransformation()->PutModifiable(inString, length);
693 }
694
695 void StreamTransformationFilter::LastPut(const byte *inString, size_t length)
696 {
697 // This block is new to StreamTransformationFilter. It is somewhat of a hack and was
698 // added for OCB mode; see GitHub Issue 515. The rub with OCB is, its a block cipher
699 // and the last block size can be 0. However, "last block = 0" is not the 0 predicated
700 // in the original code. In the original code 0 means "nothing special" so
701 // DEFAULT_PADDING is applied. OCB's 0 literally means a final block size can be 0 or
702 // non-0; and no padding is needed in either case because OCB has its own scheme (see
703 // handling of P_* and A_*).
704 // Stream ciphers have policy objects to convey how to operate the cipher. The Crypto++
705 // framework operates well when MinLastBlockSize() is 1. However, it did not appear to
706 // cover the OCB case either because we can't stream OCB. It needs full block sizes. In
707 // response we hacked a IsLastBlockSpecial(). When true StreamTransformationFilter
708 // defers to the mode for processing of the last block.
709 // The behavior supplied when IsLastBlockSpecial() will likely have to evolve to capture
710 // more complex cases from different authenc modes. I suspect it will have to change
711 // from a simple bool to something that conveys more information, like "last block
712 // no padding" or "custom padding applied by cipher".
713 // In some respect we have already hit the need for more information. For example, OCB
714 // calculates the checksum on the cipher text at the same time, so we don't need the
715 // disjoint behavior of calling "EncryptBlock" followed by a separate "AuthenticateBlock".
716 // Additional information may allow us to avoid the two separate calls.
717 if (m_isSpecial)
718 {
719 const size_t leftOver = length % m_mandatoryBlockSize;
720 byte* space = HelpCreatePutSpace(*AttachedTransformation(), DEFAULT_CHANNEL, m_reservedBufferSize);
721 length -= leftOver;
722
723 if (length)
724 {
725 // Process full blocks
726 m_cipher.ProcessData(space, inString, length);
727 AttachedTransformation()->Put(space, length);
728 inString = PtrAdd(inString, length);
729 }
730
731 if (leftOver)
732 {
733 // Process final partial block
734 length = m_cipher.ProcessLastBlock(space, m_reservedBufferSize, inString, leftOver);
735 AttachedTransformation()->Put(space, length);
736 }
737 else
738 {
739 // Process final empty block
740 length = m_cipher.ProcessLastBlock(space, m_reservedBufferSize, NULLPTR, 0);
741 AttachedTransformation()->Put(space, length);
742 }
743
744 return;
745 }
746
747 switch (m_padding)
748 {
749 case NO_PADDING:
750 case ZEROS_PADDING:
751 if (length > 0)
752 {
753 const size_t minLastBlockSize = m_cipher.MinLastBlockSize();
754 const bool isForwardTransformation = m_cipher.IsForwardTransformation();
755
756 if (isForwardTransformation && m_padding == ZEROS_PADDING && (minLastBlockSize == 0 || length < minLastBlockSize))
757 {
758 // do padding
759 size_t blockSize = STDMAX(minLastBlockSize, (size_t)m_mandatoryBlockSize);
760 byte* space = HelpCreatePutSpace(*AttachedTransformation(), DEFAULT_CHANNEL, blockSize);
761 if (inString) {std::memcpy(space, inString, length);}
762 std::memset(PtrAdd(space, length), 0, blockSize - length);
763 size_t used = m_cipher.ProcessLastBlock(space, blockSize, space, blockSize);
764 AttachedTransformation()->Put(space, used);
765 }
766 else
767 {
768 if (minLastBlockSize == 0)
769 {
770 if (isForwardTransformation)
771 throw InvalidDataFormat("StreamTransformationFilter: plaintext length is not a multiple of block size and NO_PADDING is specified");
772 else
773 throw InvalidCiphertext("StreamTransformationFilter: ciphertext length is not a multiple of block size");
774 }
775
776 byte* space = HelpCreatePutSpace(*AttachedTransformation(), DEFAULT_CHANNEL, length, m_optimalBufferSize);
777 size_t used = m_cipher.ProcessLastBlock(space, length, inString, length);
778 AttachedTransformation()->Put(space, used);
779 }
780 }
781 break;
782
783 case PKCS_PADDING:
784 case W3C_PADDING:
785 case ONE_AND_ZEROS_PADDING:
786 unsigned int s;
787 byte* space;
788 s = m_mandatoryBlockSize;
789 CRYPTOPP_ASSERT(s > 1);
790 space = HelpCreatePutSpace(*AttachedTransformation(), DEFAULT_CHANNEL, s, m_optimalBufferSize);
791 if (m_cipher.IsForwardTransformation())
792 {
793 CRYPTOPP_ASSERT(length < s);
794 if (inString) {std::memcpy(space, inString, length);}
795 if (m_padding == PKCS_PADDING)
796 {
797 CRYPTOPP_ASSERT(s < 256);
798 byte pad = static_cast<byte>(s-length);
799 std::memset(PtrAdd(space, length), pad, s-length);
800 }
801 else if (m_padding == W3C_PADDING)
802 {
803 CRYPTOPP_ASSERT(s < 256);
804 std::memset(PtrAdd(space, length), 0, s-length-1);
805 space[s-1] = static_cast<byte>(s-length);
806 }
807 else
808 {
809 space[length] = 0x80;
810 std::memset(PtrAdd(space, length+1), 0, s-length-1);
811 }
812 m_cipher.ProcessData(space, space, s);
813 AttachedTransformation()->Put(space, s);
814 }
815 else
816 {
817 if (length != s)
818 throw InvalidCiphertext("StreamTransformationFilter: ciphertext length is not a multiple of block size");
819 m_cipher.ProcessData(space, inString, s);
820 if (m_padding == PKCS_PADDING)
821 {
822 byte pad = space[s-1];
823 if (pad < 1 || pad > s || FindIfNot(PtrAdd(space, s-pad), PtrAdd(space, s), pad) != PtrAdd(space, s))
824 throw InvalidCiphertext("StreamTransformationFilter: invalid PKCS #7 block padding found");
825 length = s-pad;
826 }
827 else if (m_padding == W3C_PADDING)
828 {
829 byte pad = space[s - 1];
830 if (pad < 1 || pad > s)
831 throw InvalidCiphertext("StreamTransformationFilter: invalid W3C block padding found");
832 length = s - pad;
833 }
834 else
835 {
836 while (length > 1 && space[length-1] == 0)
837 --length;
838 if (space[--length] != 0x80)
839 throw InvalidCiphertext("StreamTransformationFilter: invalid ones-and-zeros padding found");
840 }
841 AttachedTransformation()->Put(space, length);
842 }
843 break;
844
845 default:
846 CRYPTOPP_ASSERT(false);
847 }
848 }
849
850 // *************************************************************
851
852 HashFilter::HashFilter(HashTransformation &hm, BufferedTransformation *attachment, bool putMessage, int truncatedDigestSize, const std::string &messagePutChannel, const std::string &hashPutChannel)
853 : m_hashModule(hm), m_putMessage(putMessage), m_digestSize(0), m_space(NULLPTR)
854 , m_messagePutChannel(messagePutChannel), m_hashPutChannel(hashPutChannel)
855 {
856 m_digestSize = truncatedDigestSize < 0 ? m_hashModule.DigestSize() : truncatedDigestSize;
857 Detach(attachment);
858 }
859
860 void HashFilter::IsolatedInitialize(const NameValuePairs &parameters)
861 {
862 m_putMessage = parameters.GetValueWithDefault(Name::PutMessage(), false);
863 int s = parameters.GetIntValueWithDefault(Name::TruncatedDigestSize(), -1);
864 m_digestSize = s < 0 ? m_hashModule.DigestSize() : s;
865 }
866
867 size_t HashFilter::Put2(const byte *inString, size_t length, int messageEnd, bool blocking)
868 {
869 FILTER_BEGIN;
870 if (m_putMessage)
871 FILTER_OUTPUT3(1, 0, inString, length, 0, m_messagePutChannel);
872 if (inString && length)
873 m_hashModule.Update(inString, length);
874 if (messageEnd)
875 {
876 {
877 size_t size;
878 m_space = HelpCreatePutSpace(*AttachedTransformation(), m_hashPutChannel, m_digestSize, m_digestSize, size = m_digestSize);
879 m_hashModule.TruncatedFinal(m_space, m_digestSize);
880 }
881 FILTER_OUTPUT3(2, 0, m_space, m_digestSize, messageEnd, m_hashPutChannel);
882 }
883 FILTER_END_NO_MESSAGE_END;
884 }
885
886 // *************************************************************
887
888 HashVerificationFilter::HashVerificationFilter(HashTransformation &hm, BufferedTransformation *attachment, word32 flags, int truncatedDigestSize)
889 : FilterWithBufferedInput(attachment)
890 , m_hashModule(hm), m_flags(0), m_digestSize(0), m_verified(false)
891 {
892 FilterWithBufferedInput::IsolatedInitialize(
893 MakeParameters
894 (Name::HashVerificationFilterFlags(), flags)
895 (Name::TruncatedDigestSize(), truncatedDigestSize));
896 }
897
898 void HashVerificationFilter::InitializeDerivedAndReturnNewSizes(const NameValuePairs &parameters, size_t &firstSize, size_t &blockSize, size_t &lastSize)
899 {
900 m_flags = parameters.GetValueWithDefault(Name::HashVerificationFilterFlags(), (word32)DEFAULT_FLAGS);
901 int s = parameters.GetIntValueWithDefault(Name::TruncatedDigestSize(), -1);
902 m_digestSize = s < 0 ? m_hashModule.DigestSize() : s;
903 m_verified = false;
904 firstSize = m_flags & HASH_AT_BEGIN ? m_digestSize : 0;
905 blockSize = 1;
906 lastSize = m_flags & HASH_AT_BEGIN ? 0 : m_digestSize;
907 }
908
909 void HashVerificationFilter::FirstPut(const byte *inString)
910 {
911 if (m_flags & HASH_AT_BEGIN)
912 {
913 m_expectedHash.New(m_digestSize);
914 if (inString) {std::memcpy(m_expectedHash, inString, m_expectedHash.size());}
915 if (m_flags & PUT_HASH)
916 AttachedTransformation()->Put(inString, m_expectedHash.size());
917 }
918 }
919
920 void HashVerificationFilter::NextPutMultiple(const byte *inString, size_t length)
921 {
922 m_hashModule.Update(inString, length);
923 if (m_flags & PUT_MESSAGE)
924 AttachedTransformation()->Put(inString, length);
925 }
926
927 void HashVerificationFilter::LastPut(const byte *inString, size_t length)
928 {
929 if (m_flags & HASH_AT_BEGIN)
930 {
931 CRYPTOPP_ASSERT(length == 0);
932 m_verified = m_hashModule.TruncatedVerify(m_expectedHash, m_digestSize);
933 }
934 else
935 {
936 m_verified = (length==m_digestSize && m_hashModule.TruncatedVerify(inString, length));
937 if (m_flags & PUT_HASH)
938 AttachedTransformation()->Put(inString, length);
939 }
940
941 if (m_flags & PUT_RESULT)
942 AttachedTransformation()->Put(m_verified);
943
944 if ((m_flags & THROW_EXCEPTION) && !m_verified)
945 throw HashVerificationFailed();
946 }
947
948 // *************************************************************
949
950 AuthenticatedEncryptionFilter::AuthenticatedEncryptionFilter(AuthenticatedSymmetricCipher &c, BufferedTransformation *attachment,
951 bool putAAD, int truncatedDigestSize, const std::string &macChannel, BlockPaddingScheme padding)
952 : StreamTransformationFilter(c, attachment, padding, true)
953 , m_hf(c, new OutputProxy(*this, false), putAAD, truncatedDigestSize, AAD_CHANNEL, macChannel)
954 {
955 CRYPTOPP_ASSERT(c.IsForwardTransformation());
956 }
957
958 void AuthenticatedEncryptionFilter::IsolatedInitialize(const NameValuePairs &parameters)
959 {
960 m_hf.IsolatedInitialize(parameters);
961 StreamTransformationFilter::IsolatedInitialize(parameters);
962 }
963
964 byte * AuthenticatedEncryptionFilter::ChannelCreatePutSpace(const std::string &channel, size_t &size)
965 {
966 if (channel.empty())
967 return StreamTransformationFilter::CreatePutSpace(size);
968
969 if (channel == AAD_CHANNEL)
970 return m_hf.CreatePutSpace(size);
971
972 throw InvalidChannelName("AuthenticatedEncryptionFilter", channel);
973 }
974
975 size_t AuthenticatedEncryptionFilter::ChannelPut2(const std::string &channel, const byte *begin, size_t length, int messageEnd, bool blocking)
976 {
977 if (channel.empty())
978 return StreamTransformationFilter::Put2(begin, length, messageEnd, blocking);
979
980 if (channel == AAD_CHANNEL)
981 return m_hf.Put2(begin, length, 0, blocking);
982
983 throw InvalidChannelName("AuthenticatedEncryptionFilter", channel);
984 }
985
986 void AuthenticatedEncryptionFilter::LastPut(const byte *inString, size_t length)
987 {
988 StreamTransformationFilter::LastPut(inString, length);
989 m_hf.MessageEnd();
990 }
991
992 // *************************************************************
993
994 AuthenticatedDecryptionFilter::AuthenticatedDecryptionFilter(AuthenticatedSymmetricCipher &c, BufferedTransformation *attachment, word32 flags, int truncatedDigestSize, BlockPaddingScheme padding)
995 : FilterWithBufferedInput(attachment)
996 , m_hashVerifier(c, new OutputProxy(*this, false))
997 , m_streamFilter(c, new OutputProxy(*this, false), padding, true)
998 {
999 CRYPTOPP_ASSERT(!c.IsForwardTransformation() || c.IsSelfInverting());
1000 FilterWithBufferedInput::IsolatedInitialize(
1001 MakeParameters
1002 (Name::BlockPaddingScheme(), padding)
1003 (Name::AuthenticatedDecryptionFilterFlags(), flags)
1004 (Name::TruncatedDigestSize(), truncatedDigestSize));
1005 }
1006
1007 void AuthenticatedDecryptionFilter::InitializeDerivedAndReturnNewSizes(const NameValuePairs &parameters, size_t &firstSize, size_t &blockSize, size_t &lastSize)
1008 {
1009 word32 flags = parameters.GetValueWithDefault(Name::AuthenticatedDecryptionFilterFlags(), (word32)DEFAULT_FLAGS);
1010
1011 m_hashVerifier.Initialize(CombinedNameValuePairs(parameters, MakeParameters(Name::HashVerificationFilterFlags(), flags)));
1012 m_streamFilter.Initialize(parameters);
1013
1014 firstSize = m_hashVerifier.m_firstSize;
1015 blockSize = 1;
1016 lastSize = m_hashVerifier.m_lastSize;
1017 }
1018
1019 byte * AuthenticatedDecryptionFilter::ChannelCreatePutSpace(const std::string &channel, size_t &size)
1020 {
1021 if (channel.empty())
1022 return m_streamFilter.CreatePutSpace(size);
1023
1024 if (channel == AAD_CHANNEL)
1025 return m_hashVerifier.CreatePutSpace(size);
1026
1027 throw InvalidChannelName("AuthenticatedDecryptionFilter", channel);
1028 }
1029
1030 size_t AuthenticatedDecryptionFilter::ChannelPut2(const std::string &channel, const byte *begin, size_t length, int messageEnd, bool blocking)
1031 {
1032 if (channel.empty())
1033 {
1034 if (m_lastSize > 0)
1035 m_hashVerifier.ForceNextPut();
1036 return FilterWithBufferedInput::Put2(begin, length, messageEnd, blocking);
1037 }
1038
1039 if (channel == AAD_CHANNEL)
1040 return m_hashVerifier.Put2(begin, length, 0, blocking);
1041
1042 throw InvalidChannelName("AuthenticatedDecryptionFilter", channel);
1043 }
1044
1045 void AuthenticatedDecryptionFilter::FirstPut(const byte *inString)
1046 {
1047 m_hashVerifier.Put(inString, m_firstSize);
1048 }
1049
1050 void AuthenticatedDecryptionFilter::NextPutMultiple(const byte *inString, size_t length)
1051 {
1052 m_streamFilter.Put(inString, length);
1053 }
1054
1055 void AuthenticatedDecryptionFilter::LastPut(const byte *inString, size_t length)
1056 {
1057 m_streamFilter.MessageEnd();
1058 m_hashVerifier.PutMessageEnd(inString, length);
1059 }
1060
1061 // *************************************************************
1062
1063 void SignerFilter::IsolatedInitialize(const NameValuePairs &parameters)
1064 {
1065 m_putMessage = parameters.GetValueWithDefault(Name::PutMessage(), false);
1066 m_messageAccumulator.reset(m_signer.NewSignatureAccumulator(m_rng));
1067 }
1068
1069 size_t SignerFilter::Put2(const byte *inString, size_t length, int messageEnd, bool blocking)
1070 {
1071 FILTER_BEGIN;
1072 m_messageAccumulator->Update(inString, length);
1073 if (m_putMessage)
1074 FILTER_OUTPUT(1, inString, length, 0);
1075 if (messageEnd)
1076 {
1077 m_buf.New(m_signer.SignatureLength());
1078 m_signer.Sign(m_rng, m_messageAccumulator.release(), m_buf);
1079 FILTER_OUTPUT(2, m_buf, m_buf.size(), messageEnd);
1080 m_messageAccumulator.reset(m_signer.NewSignatureAccumulator(m_rng));
1081 }
1082 FILTER_END_NO_MESSAGE_END;
1083 }
1084
1085 SignatureVerificationFilter::SignatureVerificationFilter(const PK_Verifier &verifier, BufferedTransformation *attachment, word32 flags)
1086 : FilterWithBufferedInput(attachment)
1087 , m_verifier(verifier), m_flags(0), m_verified(0)
1088 {
1089 FilterWithBufferedInput::IsolatedInitialize(
1090 MakeParameters
1091 (Name::SignatureVerificationFilterFlags(), flags));
1092 }
1093
1094 void SignatureVerificationFilter::InitializeDerivedAndReturnNewSizes(const NameValuePairs &parameters, size_t &firstSize, size_t &blockSize, size_t &lastSize)
1095 {
1096 m_flags = parameters.GetValueWithDefault(Name::SignatureVerificationFilterFlags(), (word32)DEFAULT_FLAGS);
1097 m_messageAccumulator.reset(m_verifier.NewVerificationAccumulator());
1098 size_t size = m_verifier.SignatureLength();
1099 CRYPTOPP_ASSERT(size != 0); // TODO: handle recoverable signature scheme
1100 m_verified = false;
1101 firstSize = m_flags & SIGNATURE_AT_BEGIN ? size : 0;
1102 blockSize = 1;
1103 lastSize = m_flags & SIGNATURE_AT_BEGIN ? 0 : size;
1104 }
1105
1106 void SignatureVerificationFilter::FirstPut(const byte *inString)
1107 {
1108 if (m_flags & SIGNATURE_AT_BEGIN)
1109 {
1110 if (m_verifier.SignatureUpfront())
1111 m_verifier.InputSignature(*m_messageAccumulator, inString, m_verifier.SignatureLength());
1112 else
1113 {
1114 m_signature.New(m_verifier.SignatureLength());
1115 if (inString) {std::memcpy(m_signature, inString, m_signature.size());}
1116 }
1117
1118 if (m_flags & PUT_SIGNATURE)
1119 AttachedTransformation()->Put(inString, m_signature.size());
1120 }
1121 else
1122 {
1123 CRYPTOPP_ASSERT(!m_verifier.SignatureUpfront());
1124 }
1125 }
1126
1127 void SignatureVerificationFilter::NextPutMultiple(const byte *inString, size_t length)
1128 {
1129 m_messageAccumulator->Update(inString, length);
1130 if (m_flags & PUT_MESSAGE)
1131 AttachedTransformation()->Put(inString, length);
1132 }
1133
1134 void SignatureVerificationFilter::LastPut(const byte *inString, size_t length)
1135 {
1136 if (m_flags & SIGNATURE_AT_BEGIN)
1137 {
1138 CRYPTOPP_ASSERT(length == 0);
1139 m_verifier.InputSignature(*m_messageAccumulator, m_signature, m_signature.size());
1140 m_verified = m_verifier.VerifyAndRestart(*m_messageAccumulator);
1141 }
1142 else
1143 {
1144 m_verifier.InputSignature(*m_messageAccumulator, inString, length);
1145 m_verified = m_verifier.VerifyAndRestart(*m_messageAccumulator);
1146 if (m_flags & PUT_SIGNATURE)
1147 AttachedTransformation()->Put(inString, length);
1148 }
1149
1150 if (m_flags & PUT_RESULT)
1151 AttachedTransformation()->Put(m_verified);
1152
1153 if ((m_flags & THROW_EXCEPTION) && !m_verified)
1154 throw SignatureVerificationFailed();
1155 }
1156
1157 // *************************************************************
1158
1159 size_t Source::PumpAll2(bool blocking)
1160 {
1161 unsigned int messageCount = UINT_MAX;
1162 do {
1163 RETURN_IF_NONZERO(PumpMessages2(messageCount, blocking));
1164 } while(messageCount == UINT_MAX);
1165
1166 return 0;
1167 }
1168
1169 bool Store::GetNextMessage()
1170 {
1171 if (!m_messageEnd && !AnyRetrievable())
1172 {
1173 m_messageEnd=true;
1174 return true;
1175 }
1176 else
1177 return false;
1178 }
1179
1180 unsigned int Store::CopyMessagesTo(BufferedTransformation &target, unsigned int count, const std::string &channel) const
1181 {
1182 if (m_messageEnd || count == 0)
1183 return 0;
1184 else
1185 {
1186 CopyTo(target, ULONG_MAX, channel);
1187 if (GetAutoSignalPropagation())
1188 target.ChannelMessageEnd(channel, GetAutoSignalPropagation()-1);
1189 return 1;
1190 }
1191 }
1192
1193 void StringStore::StoreInitialize(const NameValuePairs &parameters)
1194 {
1195 ConstByteArrayParameter array;
1196 if (!parameters.GetValue(Name::InputBuffer(), array))
1197 throw InvalidArgument("StringStore: missing InputBuffer argument");
1198 m_store = array.begin();
1199 m_length = array.size();
1200 m_count = 0;
1201 }
1202
1203 size_t StringStore::TransferTo2(BufferedTransformation &target, lword &transferBytes, const std::string &channel, bool blocking)
1204 {
1205 lword position = 0;
1206 size_t blockedBytes = CopyRangeTo2(target, position, transferBytes, channel, blocking);
1207 m_count += static_cast<size_t>(position);
1208 transferBytes = position;
1209 return blockedBytes;
1210 }
1211
1212 size_t StringStore::CopyRangeTo2(BufferedTransformation &target, lword &begin, lword end, const std::string &channel, bool blocking) const
1213 {
1214 size_t i = UnsignedMin(m_length, m_count+begin);
1215 size_t len = UnsignedMin(m_length-i, end-begin);
1216 size_t blockedBytes = target.ChannelPut2(channel, PtrAdd(m_store, i), len, 0, blocking);
1217 if (!blockedBytes)
1218 begin = PtrAdd(begin, len);
1219 return blockedBytes;
1220 }
1221
1222 void RandomNumberStore::StoreInitialize(const NameValuePairs &parameters)
1223 {
1224 parameters.GetRequiredParameter("RandomNumberStore", "RandomNumberGeneratorPointer", m_rng);
1225 int length;
1226 parameters.GetRequiredIntParameter("RandomNumberStore", "RandomNumberStoreSize", length);
1227 m_length = length;
1228 }
1229
1230 size_t RandomNumberStore::TransferTo2(BufferedTransformation &target, lword &transferBytes, const std::string &channel, bool blocking)
1231 {
1232 if (!blocking)
1233 throw NotImplemented("RandomNumberStore: nonblocking transfer is not implemented by this object");
1234
1235 transferBytes = UnsignedMin(transferBytes, m_length - m_count);
1236 m_rng->GenerateIntoBufferedTransformation(target, channel, transferBytes);
1237 m_count += transferBytes;
1238
1239 return 0;
1240 }
1241
1242 size_t NullStore::CopyRangeTo2(BufferedTransformation &target, lword &begin, lword end, const std::string &channel, bool blocking) const
1243 {
1244 static const byte nullBytes[128] = {0};
1245 while (begin < end)
1246 {
1247 size_t len = (size_t)STDMIN(end-begin, lword(128));
1248 size_t blockedBytes = target.ChannelPut2(channel, nullBytes, len, 0, blocking);
1249 if (blockedBytes)
1250 return blockedBytes;
1251 begin = PtrAdd(begin, len);
1252 }
1253 return 0;
1254 }
1255
1256 size_t NullStore::TransferTo2(BufferedTransformation &target, lword &transferBytes, const std::string &channel, bool blocking)
1257 {
1258 lword begin = 0;
1259 size_t blockedBytes = NullStore::CopyRangeTo2(target, begin, transferBytes, channel, blocking);
1260 transferBytes = begin; m_size -= begin;
1261 return blockedBytes;
1262 }
1263
1264 NAMESPACE_END
1265
1266 #endif
MakeParameters
AlgorithmParameters MakeParameters(const char *name, const T &value, bool throwIfNotUsed=true)
Create an object that implements NameValuePairs.
Definition: algparam.h:508
argnames.h
Standard names for retrieving values by name when working with NameValuePairs.
Algorithm::AlgorithmName
virtual std::string AlgorithmName() const
Provides the name of this algorithm.
Definition: cryptlib.h:624
ArraySink::IsolatedInitialize
void IsolatedInitialize(const NameValuePairs &parameters)
Initialize or reinitialize this object, without signal propagation.
ArraySink::CreatePutSpace
byte * CreatePutSpace(size_t &size)
Request space which can be written into by the caller.
ArraySink::Put2
size_t Put2(const byte *inString, size_t length, int messageEnd, bool blocking)
Input multiple bytes for processing.
ArrayXorSink::Put2
size_t Put2(const byte *inString, size_t length, int messageEnd, bool blocking)
Input multiple bytes for processing.
AuthenticatedDecryptionFilter::DEFAULT_FLAGS
@ DEFAULT_FLAGS
Default flags using THROW_EXCEPTION.
Definition: filters.h:745
AuthenticatedDecryptionFilter::AuthenticatedDecryptionFilter
AuthenticatedDecryptionFilter(AuthenticatedSymmetricCipher &c, BufferedTransformation *attachment=NULL, word32 flags=DEFAULT_FLAGS, int truncatedDigestSize=-1, BlockPaddingScheme padding=DEFAULT_PADDING)
Construct a AuthenticatedDecryptionFilter.
AuthenticatedDecryptionFilter::ChannelCreatePutSpace
byte * ChannelCreatePutSpace(const std::string &channel, size_t &size)
Request space which can be written into by the caller.
AuthenticatedDecryptionFilter::ChannelPut2
size_t ChannelPut2(const std::string &channel, const byte *begin, size_t length, int messageEnd, bool blocking)
Input multiple bytes for processing on a channel.
AuthenticatedEncryptionFilter::ChannelPut2
size_t ChannelPut2(const std::string &channel, const byte *begin, size_t length, int messageEnd, bool blocking)
Input multiple bytes for processing on a channel.
AuthenticatedEncryptionFilter::LastPut
void LastPut(const byte *inString, size_t length)
Input the last block of data.
AuthenticatedEncryptionFilter::IsolatedInitialize
void IsolatedInitialize(const NameValuePairs &parameters)
Initialize or reinitialize this object, without signal propagation.
AuthenticatedEncryptionFilter::AuthenticatedEncryptionFilter
AuthenticatedEncryptionFilter(AuthenticatedSymmetricCipher &c, BufferedTransformation *attachment=NULL, bool putAAD=false, int truncatedDigestSize=-1, const std::string &macChannel=DEFAULT_CHANNEL, BlockPaddingScheme padding=DEFAULT_PADDING)
Construct a AuthenticatedEncryptionFilter.
AuthenticatedEncryptionFilter::ChannelCreatePutSpace
byte * ChannelCreatePutSpace(const std::string &channel, size_t &size)
Request space which can be written into by the caller.
AuthenticatedSymmetricCipher
Interface for authenticated encryption modes of operation.
Definition: cryptlib.h:1326
AutoSignaling< InputRejecting< BufferedTransformation > >::GetAutoSignalPropagation
int GetAutoSignalPropagation() const
Retrieve automatic signal propagation value.
Definition: simple.h:439
BufferedTransformation
Interface for buffered transformations.
Definition: cryptlib.h:1657
BufferedTransformation::AnyRetrievable
virtual bool AnyRetrievable() const
Determines whether bytes are ready for retrieval.
BufferedTransformation::Initialize
virtual void Initialize(const NameValuePairs &parameters=g_nullNameValuePairs, int propagation=-1)
Initialize or reinitialize this object, with signal propagation.
BufferedTransformation::MessageEnd
bool MessageEnd(int propagation=-1, bool blocking=true)
Signals the end of messages to the object.
Definition: cryptlib.h:1748
BufferedTransformation::TransferTo2
virtual size_t TransferTo2(BufferedTransformation &target, lword &byteCount, const std::string &channel=DEFAULT_CHANNEL, bool blocking=true)=0
Transfer bytes from this object to another BufferedTransformation.
BufferedTransformation::ChannelFlush
virtual bool ChannelFlush(const std::string &channel, bool hardFlush, int propagation=-1, bool blocking=true)
Flush buffered input and/or output on a channel.
BufferedTransformation::Attach
virtual void Attach(BufferedTransformation *newAttachment)
Add newAttachment to the end of attachment chain.
BufferedTransformation::ChannelPutModifiable2
virtual size_t ChannelPutModifiable2(const std::string &channel, byte *inString, size_t length, int messageEnd, bool blocking)
Input multiple bytes that may be modified by callee on a channel.
BufferedTransformation::IsolatedFlush
virtual bool IsolatedFlush(bool hardFlush, bool blocking)=0
Flushes data buffered by this object, without signal propagation.
BufferedTransformation::CopyTo
lword CopyTo(BufferedTransformation &target, lword copyMax=LWORD_MAX, const std::string &channel=DEFAULT_CHANNEL) const
Copy bytes from this object to another BufferedTransformation.
Definition: cryptlib.h:2018
BufferedTransformation::IsolatedInitialize
virtual void IsolatedInitialize(const NameValuePairs &parameters)
Initialize or reinitialize this object, without signal propagation.
Definition: cryptlib.h:1821
BufferedTransformation::CopyRangeTo2
virtual size_t CopyRangeTo2(BufferedTransformation &target, lword &begin, lword end=LWORD_MAX, const std::string &channel=DEFAULT_CHANNEL, bool blocking=true) const =0
Copy bytes from this object to another BufferedTransformation.
BufferedTransformation::TransferAllTo
void TransferAllTo(BufferedTransformation &target, const std::string &channel=DEFAULT_CHANNEL)
Transfer all bytes from this object to another BufferedTransformation.
Definition: cryptlib.h:2098
BufferedTransformation::ChannelPut2
virtual size_t ChannelPut2(const std::string &channel, const byte *inString, size_t length, int messageEnd, bool blocking)
Input multiple bytes for processing on a channel.
BufferedTransformation::PutMessageEnd
size_t PutMessageEnd(const byte *inString, size_t length, int propagation=-1, bool blocking=true)
Input multiple bytes for processing and signal the end of a message.
Definition: cryptlib.h:1762
BufferedTransformation::IsolatedMessageSeriesEnd
virtual bool IsolatedMessageSeriesEnd(bool blocking)
Marks the end of a series of messages, without signal propagation.
Definition: cryptlib.h:1837
BufferedTransformation::Flush
virtual bool Flush(bool hardFlush, int propagation=-1, bool blocking=true)
Flush buffered input and/or output, with signal propagation.
BufferedTransformation::ChannelMessageSeriesEnd
virtual bool ChannelMessageSeriesEnd(const std::string &channel, int propagation=-1, bool blocking=true)
Marks the end of a series of messages on a channel.
BufferedTransformation::ChannelMessageEnd
bool ChannelMessageEnd(const std::string &channel, int propagation=-1, bool blocking=true)
Signal the end of a message.
Definition: cryptlib.h:2257
BufferedTransformation::PutModifiable
size_t PutModifiable(byte *inString, size_t length, bool blocking=true)
Input multiple bytes that may be modified by callee.
Definition: cryptlib.h:1740
BufferedTransformation::Put
size_t Put(byte inByte, bool blocking=true)
Input a byte for processing.
Definition: cryptlib.h:1678
BufferedTransformation::CreatePutSpace
virtual byte * CreatePutSpace(size_t &size)
Request space which can be written into by the caller.
Definition: cryptlib.h:1725
ByteArrayParameter
Used to pass byte array input as part of a NameValuePairs object.
Definition: algparam.h:99
ByteArrayParameter::size
size_t size() const
Length of the memory block.
Definition: algparam.h:117
ByteArrayParameter::begin
byte * begin() const
Pointer to the first byte in the memory block.
Definition: algparam.h:113
CombinedNameValuePairs
Combines two sets of NameValuePairs.
Definition: algparam.h:129
ConstByteArrayParameter
Used to pass byte array input as part of a NameValuePairs object.
Definition: algparam.h:25
ConstByteArrayParameter::size
size_t size() const
Length of the memory block.
Definition: algparam.h:88
ConstByteArrayParameter::begin
const byte * begin() const
Pointer to the first byte in the memory block.
Definition: algparam.h:84
Filter
Implementation of BufferedTransformation's attachment interface.
Definition: filters.h:36
Filter::Initialize
void Initialize(const NameValuePairs &parameters=g_nullNameValuePairs, int propagation=-1)
Initialize or reinitialize this object, with signal propagation.
Filter::Filter
Filter(BufferedTransformation *attachment=NULL)
Construct a Filter.
Filter::AttachedTransformation
BufferedTransformation * AttachedTransformation()
Retrieve attached transformation.
Filter::Detach
void Detach(BufferedTransformation *newAttachment=NULL)
Replace an attached transformation.
Filter::CopyRangeTo2
size_t CopyRangeTo2(BufferedTransformation &target, lword &begin, lword end=LWORD_MAX, const std::string &channel=DEFAULT_CHANNEL, bool blocking=true) const
Copy bytes from this object to another BufferedTransformation.
Filter::MessageSeriesEnd
bool MessageSeriesEnd(int propagation=-1, bool blocking=true)
Marks the end of a series of messages, with signal propagation.
Filter::TransferTo2
size_t TransferTo2(BufferedTransformation &target, lword &transferBytes, const std::string &channel=DEFAULT_CHANNEL, bool blocking=true)
Transfer bytes from this object to another BufferedTransformation.
Filter::Flush
bool Flush(bool hardFlush, int propagation=-1, bool blocking=true)
Flush buffered input and/or output, with signal propagation.
FilterWithBufferedInput
Divides an input stream into discrete blocks.
Definition: filters.h:342
FilterWithBufferedInput::IsolatedFlush
bool IsolatedFlush(bool hardFlush, bool blocking)
Flushes data buffered by this object, without signal propagation.
FilterWithBufferedInput::FilterWithBufferedInput
FilterWithBufferedInput(BufferedTransformation *attachment)
Construct a FilterWithBufferedInput with an attached transformation.
FilterWithBufferedInput::Put2
size_t Put2(const byte *inString, size_t length, int messageEnd, bool blocking)
Input multiple bytes for processing.
Definition: filters.h:359
FilterWithBufferedInput::IsolatedInitialize
void IsolatedInitialize(const NameValuePairs &parameters)
Initialize or reinitialize this object, without signal propagation.
FilterWithBufferedInput::ForceNextPut
void ForceNextPut()
Flushes data buffered by this object.
HashFilter::HashFilter
HashFilter(HashTransformation &hm, BufferedTransformation *attachment=NULL, bool putMessage=false, int truncatedDigestSize=-1, const std::string &messagePutChannel=DEFAULT_CHANNEL, const std::string &hashPutChannel=DEFAULT_CHANNEL)
Construct a HashFilter.
HashFilter::CreatePutSpace
byte * CreatePutSpace(size_t &size)
Request space which can be written into by the caller.
Definition: filters.h:598
HashFilter::Put2
size_t Put2(const byte *inString, size_t length, int messageEnd, bool blocking)
Input multiple bytes for processing.
HashFilter::IsolatedInitialize
void IsolatedInitialize(const NameValuePairs &parameters)
Initialize or reinitialize this object, without signal propagation.
HashTransformation
Interface for hash functions and data processing part of MACs.
Definition: cryptlib.h:1118
HashTransformation::TruncatedFinal
virtual void TruncatedFinal(byte *digest, size_t digestSize)=0
Computes the hash of the current message.
HashTransformation::DigestSize
virtual unsigned int DigestSize() const =0
Provides the digest size of the hash.
HashTransformation::Update
virtual void Update(const byte *input, size_t length)=0
Updates a hash with additional input.
HashTransformation::TruncatedVerify
virtual bool TruncatedVerify(const byte *digest, size_t digestLength)
Verifies the hash of the current message.
HashVerificationFilter::HashVerificationFilter
HashVerificationFilter(HashTransformation &hm, BufferedTransformation *attachment=NULL, word32 flags=DEFAULT_FLAGS, int truncatedDigestSize=-1)
Construct a HashVerificationFilter.
HashVerificationFilter::DEFAULT_FLAGS
@ DEFAULT_FLAGS
Default flags using HASH_AT_BEGIN and PUT_RESULT.
Definition: filters.h:640
HashVerificationFilter::HASH_AT_BEGIN
@ HASH_AT_BEGIN
The hash is at the beginning of the message (i.e., concatenation of hash+message)
Definition: filters.h:630
HashVerificationFilter::THROW_EXCEPTION
@ THROW_EXCEPTION
The filter should throw a HashVerificationFailed if a failure is encountered.
Definition: filters.h:638
HashVerificationFilter::PUT_HASH
@ PUT_HASH
The hash should be passed to an attached transformation.
Definition: filters.h:634
HashVerificationFilter::PUT_MESSAGE
@ PUT_MESSAGE
The message should be passed to an attached transformation.
Definition: filters.h:632
HashVerificationFilter::PUT_RESULT
@ PUT_RESULT
The result of the verification should be passed to an attached transformation.
Definition: filters.h:636
InvalidArgument
An invalid argument was detected.
Definition: cryptlib.h:208
InvalidCiphertext
A decryption filter encountered invalid ciphertext.
Definition: cryptlib.h:228
InvalidDataFormat
Input data was received that did not conform to expected format.
Definition: cryptlib.h:218
MessageQueue
Data structure used to store messages.
Definition: mqueue.h:24
MeterFilter::PutModifiable2
size_t PutModifiable2(byte *inString, size_t length, int messageEnd, bool blocking)
Input multiple bytes that may be modified by callee.
MeterFilter::AddRangeToSkip
void AddRangeToSkip(unsigned int message, lword position, lword size, bool sortNow=true)
Adds a range to skip during processing.
MeterFilter::ResetMeter
void ResetMeter()
Resets the meter.
MeterFilter::Put2
size_t Put2(const byte *inString, size_t length, int messageEnd, bool blocking)
Input multiple bytes for processing.
MeterFilter::IsolatedMessageSeriesEnd
bool IsolatedMessageSeriesEnd(bool blocking)
Marks the end of a series of messages, without signal propagation.
NameValuePairs
Interface for retrieving values given their names.
Definition: cryptlib.h:327
NameValuePairs::GetValueWithDefault
T GetValueWithDefault(const char *name, T defaultValue) const
Get a named value.
Definition: cryptlib.h:397
NameValuePairs::GetValue
bool GetValue(const char *name, T &value) const
Get a named value.
Definition: cryptlib.h:384
NameValuePairs::GetIntValueWithDefault
CRYPTOPP_DLL int GetIntValueWithDefault(const char *name, int defaultValue) const
Get a named value with type int, with default.
Definition: cryptlib.h:429
NameValuePairs::GetRequiredIntParameter
CRYPTOPP_DLL void GetRequiredIntParameter(const char *className, const char *name, int &value) const
Retrieves a required name/value pair.
Definition: cryptlib.h:488
NameValuePairs::GetRequiredParameter
void GetRequiredParameter(const char *className, const char *name, T &value) const
Retrieves a required name/value pair.
Definition: cryptlib.h:473
NotImplemented
A method was called which was not implemented.
Definition: cryptlib.h:238
NullStore::CopyRangeTo2
size_t CopyRangeTo2(BufferedTransformation &target, lword &begin, lword end=LWORD_MAX, const std::string &channel=DEFAULT_CHANNEL, bool blocking=true) const
Copy bytes from this object to another BufferedTransformation.
NullStore::TransferTo2
size_t TransferTo2(BufferedTransformation &target, lword &transferBytes, const std::string &channel=DEFAULT_CHANNEL, bool blocking=true)
Transfer bytes from this object to another BufferedTransformation.
OutputProxy
Filter class that is a proxy for a sink.
Definition: filters.h:991
PK_SignatureScheme::SignatureUpfront
virtual bool SignatureUpfront() const
Determines whether the signature must be input before the message.
Definition: cryptlib.h:2853
PK_SignatureScheme::SignatureLength
virtual size_t SignatureLength() const =0
Provides the signature length if it only depends on the key.
PK_Signer::Sign
virtual size_t Sign(RandomNumberGenerator &rng, PK_MessageAccumulator *messageAccumulator, byte *signature) const
Sign and delete the messageAccumulator.
PK_Signer::NewSignatureAccumulator
virtual PK_MessageAccumulator * NewSignatureAccumulator(RandomNumberGenerator &rng) const =0
Create a new HashTransformation to accumulate the message to be signed.
PK_Verifier
Interface for public-key signature verifiers.
Definition: cryptlib.h:2946
PK_Verifier::VerifyAndRestart
virtual bool VerifyAndRestart(PK_MessageAccumulator &messageAccumulator) const =0
Check whether messageAccumulator contains a valid signature and message, and restart messageAccumulat...
PK_Verifier::InputSignature
virtual void InputSignature(PK_MessageAccumulator &messageAccumulator, const byte *signature, size_t signatureLength) const =0
Input signature into a message accumulator.
PK_Verifier::NewVerificationAccumulator
virtual PK_MessageAccumulator * NewVerificationAccumulator() const =0
Create a new HashTransformation to accumulate the message to be verified.
ProxyFilter::ProxyFilter
ProxyFilter(BufferedTransformation *filter, size_t firstSize, size_t lastSize, BufferedTransformation *attachment)
Construct a ProxyFilter.
ProxyFilter::SetFilter
void SetFilter(Filter *filter)
Sets the OutputProxy filter.
ProxyFilter::IsolatedFlush
bool IsolatedFlush(bool hardFlush, bool blocking)
Flushes data buffered by this object, without signal propagation.
RandomNumberGenerator::IncorporateEntropy
virtual void IncorporateEntropy(const byte *input, size_t length)
Update RNG state with additional unpredictable values.
Definition: cryptlib.h:1452
RandomNumberGenerator::GenerateIntoBufferedTransformation
virtual void GenerateIntoBufferedTransformation(BufferedTransformation &target, const std::string &channel, lword length)
Generate random bytes into a BufferedTransformation.
RandomNumberSink::IsolatedInitialize
void IsolatedInitialize(const NameValuePairs &parameters)
Initialize or reinitialize this object, without signal propagation.
RandomNumberSink::Put2
size_t Put2(const byte *inString, size_t length, int messageEnd, bool blocking)
Input multiple bytes for processing.
RandomNumberStore::TransferTo2
size_t TransferTo2(BufferedTransformation &target, lword &transferBytes, const std::string &channel=DEFAULT_CHANNEL, bool blocking=true)
Transfer bytes from this object to another BufferedTransformation.
Redirector::PASS_EVERYTHING
@ PASS_EVERYTHING
Pass everything.
Definition: filters.h:898
Redirector::GetPassSignals
bool GetPassSignals() const
Retrieve signal propagation behavior.
Definition: filters.h:926
Redirector::Initialize
void Initialize(const NameValuePairs &parameters, int propagation)
Initialize or reinitialize this object, with signal propagation.
SecBlock::New
void New(size_type newSize)
Change size without preserving contents.
Definition: secblock.h:1126
SecBlock::size
size_type size() const
Provides the count of elements in the SecBlock.
Definition: secblock.h:867
SecByteBlock
SecBlock<byte> typedef.
Definition: secblock.h:1226
SignatureVerificationFilter::SIGNATURE_AT_BEGIN
@ SIGNATURE_AT_BEGIN
The signature is at the beginning of the message (i.e., concatenation of signature+message)
Definition: filters.h:840
SignatureVerificationFilter::THROW_EXCEPTION
@ THROW_EXCEPTION
The filter should throw a HashVerificationFailed if a failure is encountered.
Definition: filters.h:848
SignatureVerificationFilter::DEFAULT_FLAGS
@ DEFAULT_FLAGS
Default flags using SIGNATURE_AT_BEGIN and PUT_RESULT.
Definition: filters.h:850
SignatureVerificationFilter::PUT_MESSAGE
@ PUT_MESSAGE
The message should be passed to an attached transformation.
Definition: filters.h:842
SignatureVerificationFilter::PUT_RESULT
@ PUT_RESULT
The result of the verification should be passed to an attached transformation.
Definition: filters.h:846
SignatureVerificationFilter::PUT_SIGNATURE
@ PUT_SIGNATURE
The signature should be passed to an attached transformation.
Definition: filters.h:844
SignatureVerificationFilter::SignatureVerificationFilter
SignatureVerificationFilter(const PK_Verifier &verifier, BufferedTransformation *attachment=NULL, word32 flags=DEFAULT_FLAGS)
Construct a SignatureVerificationFilter.
SignerFilter::Put2
size_t Put2(const byte *inString, size_t length, int messageEnd, bool blocking)
Input multiple bytes for processing.
SignerFilter::IsolatedInitialize
void IsolatedInitialize(const NameValuePairs &parameters)
Initialize or reinitialize this object, without signal propagation.
Source::PumpMessages2
virtual size_t PumpMessages2(unsigned int &messageCount, bool blocking=true)=0
Pump messages to attached transformation.
Source::PumpAll2
virtual size_t PumpAll2(bool blocking=true)
Pump all data to attached transformation.
Store::GetNextMessage
bool GetNextMessage()
Start retrieving the next message.
StreamTransformationFilter
Filter wrapper for StreamTransformation.
Definition: filters.h:532
StreamTransformationFilter::StreamTransformationFilter
StreamTransformationFilter(StreamTransformation &c, BufferedTransformation *attachment=NULL, BlockPaddingScheme padding=DEFAULT_PADDING)
Construct a StreamTransformationFilter.
StreamTransformation
Interface for the data processing portion of stream ciphers.
Definition: cryptlib.h:951
StreamTransformation::MinLastBlockSize
virtual unsigned int MinLastBlockSize() const
Provides the size of the last block.
Definition: cryptlib.h:1026
StreamTransformation::ProcessData
virtual void ProcessData(byte *outString, const byte *inString, size_t length)=0
Encrypt or decrypt an array of bytes.
StreamTransformation::IsForwardTransformation
virtual bool IsForwardTransformation() const =0
Determines if the cipher is being operated in its forward direction.
StreamTransformation::ProcessLastBlock
virtual size_t ProcessLastBlock(byte *outString, size_t outLength, const byte *inString, size_t inLength)
Encrypt or decrypt the last block of data.
StreamTransformation::GetOptimalBlockSizeUsed
virtual unsigned int GetOptimalBlockSizeUsed() const
Provides the number of bytes used in the current block when processing at optimal block size.
Definition: cryptlib.h:981
StreamTransformation::ProcessString
void ProcessString(byte *inoutString, size_t length)
Encrypt or decrypt a string of bytes.
Definition: cryptlib.h:1065
StreamTransformation::MandatoryBlockSize
virtual unsigned int MandatoryBlockSize() const
Provides the mandatory block size of the cipher.
Definition: cryptlib.h:970
StringStore::CopyRangeTo2
CRYPTOPP_DLL size_t CopyRangeTo2(BufferedTransformation &target, lword &begin, lword end=LWORD_MAX, const std::string &channel=DEFAULT_CHANNEL, bool blocking=true) const
Copy bytes from this object to another BufferedTransformation.
StringStore::TransferTo2
CRYPTOPP_DLL size_t TransferTo2(BufferedTransformation &target, lword &transferBytes, const std::string &channel=DEFAULT_CHANNEL, bool blocking=true)
Transfer bytes from this object to another BufferedTransformation.
member_ptr
Pointer that overloads operator ->
Definition: smartptr.h:38
config.h
Library configuration file.
word32
unsigned int word32
32-bit unsigned datatype
Definition: config_int.h:72
lword
word64 lword
Large word type.
Definition: config_int.h:168
DEFAULT_CHANNEL
const std::string DEFAULT_CHANNEL
Default channel for BufferedTransformation.
Definition: cryptlib.h:516
AAD_CHANNEL
const std::string AAD_CHANNEL
Channel for additional authenticated data.
Definition: cryptlib.h:525
filters.h
Implementation of BufferedTransformation's attachment interface.
misc.h
Utility functions for the Crypto++ library.
SaturatingSubtract
T1 SaturatingSubtract(const T1 &a, const T2 &b)
Performs a saturating subtract clamped at 0.
Definition: misc.h:1302
SIZE_MAX
#define SIZE_MAX
The maximum value of a machine word.
Definition: misc.h:120
PtrDiff
ptrdiff_t PtrDiff(const PTR pointer1, const PTR pointer2)
Determine pointer difference.
Definition: misc.h:416
RoundDownToMultipleOf
T1 RoundDownToMultipleOf(const T1 &n, const T2 &m)
Rounds a value down to a multiple of a second value.
Definition: misc.h:1354
FindIfNot
InputIt FindIfNot(InputIt first, InputIt last, const T &value)
Finds first element not in a range.
Definition: misc.h:3190
PtrAdd
PTR PtrAdd(PTR pointer, OFF offset)
Create a pointer with an offset.
Definition: misc.h:388
STDMIN
const T & STDMIN(const T &a, const T &b)
Replacement function for std::min.
Definition: misc.h:657
UnsignedMin
const T1 UnsignedMin(const T1 &a, const T2 &b)
Safe comparison of values that could be negative and incorrectly promoted.
Definition: misc.h:695
STDMAX
const T & STDMAX(const T &a, const T &b)
Replacement function for std::max.
Definition: misc.h:668
xorbuf
CRYPTOPP_DLL void xorbuf(byte *buf, const byte *mask, size_t count)
Performs an XOR of a buffer with a mask.
mqueue.h
Classes for an unlimited queue to store messages.
CryptoPP
Crypto++ library namespace.
Name::TruncatedDigestSize
const char * TruncatedDigestSize()
int
Definition: argnames.h:51
Name::AuthenticatedDecryptionFilterFlags
const char * AuthenticatedDecryptionFilterFlags()
word32
Definition: argnames.h:54
Name::BlockPaddingScheme
const char * BlockPaddingScheme()
StreamTransformationFilter::BlockPaddingScheme.
Definition: argnames.h:52
Name::OutputBuffer
const char * OutputBuffer()
ByteArrayParameter.
Definition: argnames.h:57
Name::HashVerificationFilterFlags
const char * HashVerificationFilterFlags()
word32
Definition: argnames.h:53
Name::PutMessage
const char * PutMessage()
bool
Definition: argnames.h:50
Name::InputBuffer
const char * InputBuffer()
ConstByteArrayParameter.
Definition: argnames.h:56
Name::SignatureVerificationFilterFlags
const char * SignatureVerificationFilterFlags()
word32
Definition: argnames.h:55
pch.h
Precompiled header file.
smartptr.h
Classes for automatic resource management.
stdcpp.h
Common C++ header files.
BlockPaddingSchemeDef::BlockPaddingScheme
BlockPaddingScheme
Padding schemes used for block ciphers.
Definition: filters.h:501
BlockPaddingSchemeDef::DEFAULT_PADDING
@ DEFAULT_PADDING
Default padding scheme.
Definition: filters.h:521
BlockPaddingSchemeDef::W3C_PADDING
@ W3C_PADDING
W3C padding added to a block.
Definition: filters.h:518
BlockPaddingSchemeDef::PKCS_PADDING
@ PKCS_PADDING
PKCS padding added to a block.
Definition: filters.h:510
BlockPaddingSchemeDef::ONE_AND_ZEROS_PADDING
@ ONE_AND_ZEROS_PADDING
1 and 0's padding added to a block
Definition: filters.h:513
BlockPaddingSchemeDef::NO_PADDING
@ NO_PADDING
No padding added to a block.
Definition: filters.h:504
BlockPaddingSchemeDef::ZEROS_PADDING
@ ZEROS_PADDING
0's padding added to a block
Definition: filters.h:507
FilterPutSpaceHelper::HelpCreatePutSpace
byte * HelpCreatePutSpace(BufferedTransformation &target, const std::string &channel, size_t minSize, size_t desiredSize, size_t &bufferSize)
Create a working space in a BufferedTransformation.
Definition: filters.h:187
CRYPTOPP_ASSERT
#define CRYPTOPP_ASSERT(exp)
Debugging and diagnostic assertion.
Definition: trap.h:68