Crypto++ 8.5 Free C++ class library of cryptographic schemes

asn.cpp
1 // asn.cpp - originally written and placed in the public domain by Wei Dai
2 // CryptoPP::Test namespace added by JW in February 2017
3
4 #include "pch.h"
5 #include "config.h"
6
7 #ifndef CRYPTOPP_IMPORTS
8
9 #include "cryptlib.h"
10 #include "asn.h"
11 #include "misc.h"
12
13 #include <iostream>
14 #include <iomanip>
15 #include <sstream>
16 #include <time.h>
17
18 NAMESPACE_BEGIN(CryptoPP)
19
20 size_t DERLengthEncode(BufferedTransformation &bt, lword length)
21 {
22 size_t i=0;
23 if (length <= 0x7f)
24 {
25 bt.Put(byte(length));
26 i++;
27 }
28 else
29 {
30 bt.Put(byte(BytePrecision(length) | 0x80));
31 i++;
32 for (int j=BytePrecision(length); j; --j)
33 {
34 bt.Put(byte(length >> (j-1)*8));
35 i++;
36 }
37 }
38 return i;
39 }
40
41 bool BERLengthDecode(BufferedTransformation &bt, lword &length, bool &definiteLength)
42 {
43 byte b;
44
45 if (!bt.Get(b))
46 return false;
47
48 if (!(b & 0x80))
49 {
50 definiteLength = true;
51 length = b;
52 }
53 else
54 {
55 unsigned int lengthBytes = b & 0x7f;
56
57 if (lengthBytes == 0)
58 {
59 definiteLength = false;
60 return true;
61 }
62
63 definiteLength = true;
64 length = 0;
65 while (lengthBytes--)
66 {
67 if (length >> (8*(sizeof(length)-1)))
68 BERDecodeError(); // length about to overflow
69
70 if (!bt.Get(b))
71 return false;
72
73 length = (length << 8) | b;
74 }
75 }
76 return true;
77 }
78
79 bool BERLengthDecode(BufferedTransformation &bt, size_t &length)
80 {
81 lword lw = 0;
82 bool definiteLength = false;
83 if (!BERLengthDecode(bt, lw, definiteLength))
84 BERDecodeError();
85 if (!SafeConvert(lw, length))
86 BERDecodeError();
87 return definiteLength;
88 }
89
90 void DEREncodeNull(BufferedTransformation &out)
91 {
92 out.Put(TAG_NULL);
93 out.Put(0);
94 }
95
96 void BERDecodeNull(BufferedTransformation &in)
97 {
98 byte b;
99 if (!in.Get(b) || b != TAG_NULL)
100 BERDecodeError();
101 size_t length;
102 if (!BERLengthDecode(in, length) || length != 0)
103 BERDecodeError();
104 }
105
106 /// ASN Strings
107 size_t DEREncodeOctetString(BufferedTransformation &bt, const byte *str, size_t strLen)
108 {
109 bt.Put(OCTET_STRING);
110 size_t lengthBytes = DERLengthEncode(bt, strLen);
111 bt.Put(str, strLen);
112 return 1+lengthBytes+strLen;
113 }
114
115 size_t DEREncodeOctetString(BufferedTransformation &bt, const SecByteBlock &str)
116 {
117 return DEREncodeOctetString(bt, ConstBytePtr(str), BytePtrSize(str));
118 }
119
120 size_t BERDecodeOctetString(BufferedTransformation &bt, SecByteBlock &str)
121 {
122 byte b;
123 if (!bt.Get(b) || b != OCTET_STRING)
124 BERDecodeError();
125
126 size_t bc;
127 if (!BERLengthDecode(bt, bc))
128 BERDecodeError();
129 if (bc > bt.MaxRetrievable()) // Issue 346
130 BERDecodeError();
131
132 str.New(bc);
133 if (bc != bt.Get(BytePtr(str), bc))
134 BERDecodeError();
135 return bc;
136 }
137
138 size_t BERDecodeOctetString(BufferedTransformation &bt, BufferedTransformation &str)
139 {
140 byte b;
141 if (!bt.Get(b) || b != OCTET_STRING)
142 BERDecodeError();
143
144 size_t bc;
145 if (!BERLengthDecode(bt, bc))
146 BERDecodeError();
147 if (bc > bt.MaxRetrievable()) // Issue 346
148 BERDecodeError();
149
150 bt.TransferTo(str, bc);
151 return bc;
152 }
153
154 size_t DEREncodeTextString(BufferedTransformation &bt, const byte* str, size_t strLen, byte asnTag)
155 {
156 bt.Put(asnTag);
157 size_t lengthBytes = DERLengthEncode(bt, strLen);
158 bt.Put(str, strLen);
159 return 1+lengthBytes+strLen;
160 }
161
162 size_t DEREncodeTextString(BufferedTransformation &bt, const SecByteBlock &str, byte asnTag)
163 {
164 return DEREncodeTextString(bt, ConstBytePtr(str), BytePtrSize(str), asnTag);
165 }
166
167 size_t DEREncodeTextString(BufferedTransformation &bt, const std::string &str, byte asnTag)
168 {
169 return DEREncodeTextString(bt, ConstBytePtr(str), BytePtrSize(str), asnTag);
170 }
171
172 size_t BERDecodeTextString(BufferedTransformation &bt, SecByteBlock &str, byte asnTag)
173 {
174 byte b;
175 if (!bt.Get(b) || b != asnTag)
176 BERDecodeError();
177
178 size_t bc;
179 if (!BERLengthDecode(bt, bc))
180 BERDecodeError();
181 if (bc > bt.MaxRetrievable()) // Issue 346
182 BERDecodeError();
183
184 str.resize(bc);
185 if (bc != bt.Get(BytePtr(str), BytePtrSize(str)))
186 BERDecodeError();
187
188 return bc;
189 }
190
191 size_t BERDecodeTextString(BufferedTransformation &bt, std::string &str, byte asnTag)
192 {
193 byte b;
194 if (!bt.Get(b) || b != asnTag)
195 BERDecodeError();
196
197 size_t bc;
198 if (!BERLengthDecode(bt, bc))
199 BERDecodeError();
200 if (bc > bt.MaxRetrievable()) // Issue 346
201 BERDecodeError();
202
203 str.resize(bc);
204 if (bc != bt.Get(BytePtr(str), BytePtrSize(str)))
205 BERDecodeError();
206
207 return bc;
208 }
209
210 size_t DEREncodeDate(BufferedTransformation &bt, const SecByteBlock &str, byte asnTag)
211 {
212 bt.Put(asnTag);
213 size_t lengthBytes = DERLengthEncode(bt, str.size());
214 bt.Put(ConstBytePtr(str), BytePtrSize(str));
215 return 1+lengthBytes+str.size();
216 }
217
218 size_t BERDecodeDate(BufferedTransformation &bt, SecByteBlock &str, byte asnTag)
219 {
220 byte b;
221 if (!bt.Get(b) || b != asnTag)
222 BERDecodeError();
223
224 size_t bc;
225 if (!BERLengthDecode(bt, bc))
226 BERDecodeError();
227 if (bc > bt.MaxRetrievable()) // Issue 346
228 BERDecodeError();
229
230 str.resize(bc);
231 if (bc != bt.Get(BytePtr(str), BytePtrSize(str)))
232 BERDecodeError();
233
234 return bc;
235 }
236
237 size_t DEREncodeBitString(BufferedTransformation &bt, const byte *str, size_t strLen, unsigned int unusedBits)
238 {
239 bt.Put(BIT_STRING);
240 size_t lengthBytes = DERLengthEncode(bt, strLen+1);
241 bt.Put((byte)unusedBits);
242 bt.Put(str, strLen);
243 return 2+lengthBytes+strLen;
244 }
245
246 size_t BERDecodeBitString(BufferedTransformation &bt, SecByteBlock &str, unsigned int &unusedBits)
247 {
248 byte b;
249 if (!bt.Get(b) || b != BIT_STRING)
250 BERDecodeError();
251
252 size_t bc;
253 if (!BERLengthDecode(bt, bc))
254 BERDecodeError();
255 if (bc == 0)
256 BERDecodeError();
257 if (bc > bt.MaxRetrievable()) // Issue 346
258 BERDecodeError();
259
260 // X.690, 8.6.2.2: "The number [of unused bits] shall be in the range zero to seven"
261 byte unused;
262 if (!bt.Get(unused) || unused > 7)
263 BERDecodeError();
264 unusedBits = unused;
265 str.resize(bc-1);
266 if ((bc-1) != bt.Get(BytePtr(str), bc-1))
267 BERDecodeError();
268 return bc-1;
269 }
270
271 void DERReencode(BufferedTransformation &source, BufferedTransformation &dest)
272 {
273 byte tag;
274 source.Peek(tag);
275 BERGeneralDecoder decoder(source, tag);
276 DERGeneralEncoder encoder(dest, tag);
277 if (decoder.IsDefiniteLength())
278 decoder.TransferTo(encoder, decoder.RemainingLength());
279 else
280 {
281 while (!decoder.EndReached())
282 DERReencode(decoder, encoder);
283 }
284 decoder.MessageEnd();
285 encoder.MessageEnd();
286 }
287
288 size_t BERDecodePeekLength(const BufferedTransformation &bt)
289 {
290 lword count = (std::min)(bt.MaxRetrievable(), static_cast<lword>(16));
291 if (count == 0) return 0;
292
293 ByteQueue tagAndLength;
294 bt.CopyTo(tagAndLength, count);
295
296 // Skip tag
297 tagAndLength.Skip(1);
298
299 // BERLengthDecode fails for indefinite length.
300 size_t length;
301 if (!BERLengthDecode(tagAndLength, length))
302 return 0;
303
304 return length;
305 }
306
307 void OID::EncodeValue(BufferedTransformation &bt, word32 v)
308 {
309 for (unsigned int i=RoundUpToMultipleOf(STDMAX(7U,BitPrecision(v)), 7U)-7; i != 0; i-=7)
310 bt.Put((byte)(0x80 | ((v >> i) & 0x7f)));
311 bt.Put((byte)(v & 0x7f));
312 }
313
314 size_t OID::DecodeValue(BufferedTransformation &bt, word32 &v)
315 {
316 byte b;
317 size_t i=0;
318 v = 0;
319 while (true)
320 {
321 if (!bt.Get(b))
322 BERDecodeError();
323 i++;
324 if (v >> (8*sizeof(v)-7)) // v about to overflow
325 BERDecodeError();
326 v <<= 7;
327 v += b & 0x7f;
328 if (!(b & 0x80))
329 return i;
330 }
331 }
332
333 void OID::DEREncode(BufferedTransformation &bt) const
334 {
335 CRYPTOPP_ASSERT(m_values.size() >= 2);
336 ByteQueue temp;
337 temp.Put(byte(m_values[0] * 40 + m_values[1]));
338 for (size_t i=2; i<m_values.size(); i++)
339 EncodeValue(temp, m_values[i]);
340 bt.Put(OBJECT_IDENTIFIER);
341 DERLengthEncode(bt, temp.CurrentSize());
342 temp.TransferTo(bt);
343 }
344
345 void OID::BERDecode(BufferedTransformation &bt)
346 {
347 byte b;
348 if (!bt.Get(b) || b != OBJECT_IDENTIFIER)
349 BERDecodeError();
350
351 size_t length;
352 if (!BERLengthDecode(bt, length) || length < 1)
353 BERDecodeError();
354
355 if (!bt.Get(b))
356 BERDecodeError();
357
358 length--;
359 m_values.resize(2);
360 m_values[0] = b / 40;
361 m_values[1] = b % 40;
362
363 while (length > 0)
364 {
365 word32 v;
366 size_t valueLen = DecodeValue(bt, v);
367 if (valueLen > length)
368 BERDecodeError();
369 m_values.push_back(v);
370 length -= valueLen;
371 }
372 }
373
374 void OID::BERDecodeAndCheck(BufferedTransformation &bt) const
375 {
376 OID oid(bt);
377 if (*this != oid)
378 BERDecodeError();
379 }
380
381 std::ostream& OID::Print(std::ostream& out) const
382 {
383 std::ostringstream oss;
384 for (size_t i = 0; i < m_values.size(); ++i)
385 {
386 oss << m_values[i];
387 if (i+1 < m_values.size())
388 oss << ".";
389 }
390 return out << oss.str();
391 }
392
393 inline BufferedTransformation & EncodedObjectFilter::CurrentTarget()
394 {
395 if (m_flags & PUT_OBJECTS)
396 return *AttachedTransformation();
397 else
398 return TheBitBucket();
399 }
400
401 void EncodedObjectFilter::Put(const byte *inString, size_t length)
402 {
403 if (m_nCurrentObject == m_nObjects)
404 {
405 AttachedTransformation()->Put(inString, length);
406 return;
407 }
408
409 LazyPutter lazyPutter(m_queue, inString, length);
410
411 while (m_queue.AnyRetrievable())
412 {
413 switch (m_state)
414 {
415 case IDENTIFIER:
416 if (!m_queue.Get(m_id))
417 return;
418 m_queue.TransferTo(CurrentTarget(), 1);
419 m_state = LENGTH;
420 // fall through
421 case LENGTH:
422 {
423 byte b;
424 if (m_level > 0 && m_id == 0 && m_queue.Peek(b) && b == 0)
425 {
426 m_queue.TransferTo(CurrentTarget(), 1);
427 m_level--;
428 m_state = IDENTIFIER;
429 break;
430 }
431 ByteQueue::Walker walker(m_queue);
432 bool definiteLength = false;
433 if (!BERLengthDecode(walker, m_lengthRemaining, definiteLength))
434 return;
435 m_queue.TransferTo(CurrentTarget(), walker.GetCurrentPosition());
436 if (!((m_id & CONSTRUCTED) || definiteLength))
437 BERDecodeError();
438 if (!definiteLength)
439 {
440 if (!(m_id & CONSTRUCTED))
441 BERDecodeError();
442 m_level++;
443 m_state = IDENTIFIER;
444 break;
445 }
446 m_state = BODY;
447 }
448 // fall through
449 case BODY:
450 m_lengthRemaining -= m_queue.TransferTo(CurrentTarget(), m_lengthRemaining);
451
452 if (m_lengthRemaining == 0)
453 m_state = IDENTIFIER;
454 // fall through
455 case TAIL:
456 case ALL_DONE:
457 default: ;
458 }
459
460 if (m_state == IDENTIFIER && m_level == 0)
461 {
462 // just finished processing a level 0 object
463 ++m_nCurrentObject;
464
465 if (m_flags & PUT_MESSANGE_END_AFTER_EACH_OBJECT)
466 AttachedTransformation()->MessageEnd();
467
468 if (m_nCurrentObject == m_nObjects)
469 {
470 if (m_flags & PUT_MESSANGE_END_AFTER_ALL_OBJECTS)
471 AttachedTransformation()->MessageEnd();
472
473 if (m_flags & PUT_MESSANGE_SERIES_END_AFTER_ALL_OBJECTS)
474 AttachedTransformation()->MessageSeriesEnd();
475
476 m_queue.TransferAllTo(*AttachedTransformation());
477 return;
478 }
479 }
480 }
481 }
482
483 BERGeneralDecoder::BERGeneralDecoder(BufferedTransformation &inQueue)
484 : m_inQueue(inQueue), m_length(0), m_finished(false)
485 {
486 Init(DefaultTag);
487 }
488
489 BERGeneralDecoder::BERGeneralDecoder(BufferedTransformation &inQueue, byte asnTag)
490 : m_inQueue(inQueue), m_length(0), m_finished(false)
491 {
492 Init(asnTag);
493 }
494
495 BERGeneralDecoder::BERGeneralDecoder(BERGeneralDecoder &inQueue, byte asnTag)
496 : m_inQueue(inQueue), m_length(0), m_finished(false)
497 {
498 Init(asnTag);
499 }
500
501 void BERGeneralDecoder::Init(byte asnTag)
502 {
503 byte b;
504 if (!m_inQueue.Get(b) || b != asnTag)
505 BERDecodeError();
506
507 if (!BERLengthDecode(m_inQueue, m_length, m_definiteLength))
508 BERDecodeError();
509
510 if (!m_definiteLength && !(asnTag & CONSTRUCTED))
511 BERDecodeError(); // cannot be primitive and have indefinite length
512 }
513
514 BERGeneralDecoder::~BERGeneralDecoder()
515 {
516 try // avoid throwing in destructor
517 {
518 if (!m_finished)
519 MessageEnd();
520 }
521 catch (const Exception&)
522 {
523 // CRYPTOPP_ASSERT(0);
524 }
525 }
526
527 bool BERGeneralDecoder::EndReached() const
528 {
529 if (m_definiteLength)
530 return m_length == 0;
531 else
532 { // check end-of-content octets
533 word16 i;
534 return (m_inQueue.PeekWord16(i)==2 && i==0);
535 }
536 }
537
538 byte BERGeneralDecoder::PeekByte() const
539 {
540 byte b;
541 if (!Peek(b))
542 BERDecodeError();
543 return b;
544 }
545
546 void BERGeneralDecoder::CheckByte(byte check)
547 {
548 byte b;
549 if (!Get(b) || b != check)
550 BERDecodeError();
551 }
552
553 void BERGeneralDecoder::MessageEnd()
554 {
555 m_finished = true;
556 if (m_definiteLength)
557 {
558 if (m_length != 0)
559 BERDecodeError();
560 }
561 else
562 { // remove end-of-content octets
563 word16 i;
564 if (m_inQueue.GetWord16(i) != 2 || i != 0)
565 BERDecodeError();
566 }
567 }
568
569 size_t BERGeneralDecoder::TransferTo2(BufferedTransformation &target, lword &transferBytes, const std::string &channel, bool blocking)
570 {
571 if (m_definiteLength && transferBytes > m_length)
572 transferBytes = m_length;
573 size_t blockedBytes = m_inQueue.TransferTo2(target, transferBytes, channel, blocking);
574 ReduceLength(transferBytes);
575 return blockedBytes;
576 }
577
578 size_t BERGeneralDecoder::CopyRangeTo2(BufferedTransformation &target, lword &begin, lword end, const std::string &channel, bool blocking) const
579 {
580 if (m_definiteLength)
581 end = STDMIN(m_length, end);
582 return m_inQueue.CopyRangeTo2(target, begin, end, channel, blocking);
583 }
584
585 lword BERGeneralDecoder::ReduceLength(lword delta)
586 {
587 if (m_definiteLength)
588 {
589 if (m_length < delta)
590 BERDecodeError();
591 m_length -= delta;
592 }
593 return delta;
594 }
595
596 DERGeneralEncoder::DERGeneralEncoder(BufferedTransformation &outQueue)
597 : m_outQueue(outQueue), m_asnTag(DefaultTag), m_finished(false)
598 {
599 }
600
601 DERGeneralEncoder::DERGeneralEncoder(BufferedTransformation &outQueue, byte asnTag)
602 : m_outQueue(outQueue), m_asnTag(asnTag), m_finished(false)
603 {
604 }
605
606 DERGeneralEncoder::DERGeneralEncoder(DERGeneralEncoder &outQueue, byte asnTag)
607 : m_outQueue(outQueue), m_asnTag(asnTag), m_finished(false)
608 {
609 }
610
611 DERGeneralEncoder::~DERGeneralEncoder()
612 {
613 try // avoid throwing in constructor
614 {
615 if (!m_finished)
616 MessageEnd();
617 }
618 catch (const Exception&)
619 {
620 CRYPTOPP_ASSERT(0);
621 }
622 }
623
624 void DERGeneralEncoder::MessageEnd()
625 {
626 m_finished = true;
627 lword length = CurrentSize();
628 m_outQueue.Put(m_asnTag);
629 DERLengthEncode(m_outQueue, length);
630 TransferTo(m_outQueue);
631 }
632
633 // *************************************************************
634
635 void X509PublicKey::BERDecode(BufferedTransformation &bt)
636 {
637 BERSequenceDecoder subjectPublicKeyInfo(bt);
638 BERSequenceDecoder algorithm(subjectPublicKeyInfo);
639 GetAlgorithmID().BERDecodeAndCheck(algorithm);
640 bool parametersPresent = algorithm.EndReached() ? false : BERDecodeAlgorithmParameters(algorithm);
641 algorithm.MessageEnd();
642
643 BERGeneralDecoder subjectPublicKey(subjectPublicKeyInfo, BIT_STRING);
644 subjectPublicKey.CheckByte(0); // unused bits
645 BERDecodePublicKey(subjectPublicKey, parametersPresent, (size_t)subjectPublicKey.RemainingLength());
646 subjectPublicKey.MessageEnd();
647 subjectPublicKeyInfo.MessageEnd();
648 }
649
650 void X509PublicKey::DEREncode(BufferedTransformation &bt) const
651 {
652 DERSequenceEncoder subjectPublicKeyInfo(bt);
653
654 DERSequenceEncoder algorithm(subjectPublicKeyInfo);
655 GetAlgorithmID().DEREncode(algorithm);
656 DEREncodeAlgorithmParameters(algorithm);
657 algorithm.MessageEnd();
658
659 DERGeneralEncoder subjectPublicKey(subjectPublicKeyInfo, BIT_STRING);
660 subjectPublicKey.Put(0); // unused bits
661 DEREncodePublicKey(subjectPublicKey);
662 subjectPublicKey.MessageEnd();
663
664 subjectPublicKeyInfo.MessageEnd();
665 }
666
667 void PKCS8PrivateKey::BERDecode(BufferedTransformation &bt)
668 {
669 BERSequenceDecoder privateKeyInfo(bt);
670 word32 version;
671 BERDecodeUnsigned<word32>(privateKeyInfo, version, INTEGER, 0, 0); // check version
672
673 BERSequenceDecoder algorithm(privateKeyInfo);
674 GetAlgorithmID().BERDecodeAndCheck(algorithm);
675 bool parametersPresent = algorithm.EndReached() ? false : BERDecodeAlgorithmParameters(algorithm);
676 algorithm.MessageEnd();
677
678 BERGeneralDecoder octetString(privateKeyInfo, OCTET_STRING);
679 BERDecodePrivateKey(octetString, parametersPresent, (size_t)privateKeyInfo.RemainingLength());
680 octetString.MessageEnd();
681
682 if (!privateKeyInfo.EndReached())
683 BERDecodeOptionalAttributes(privateKeyInfo);
684 privateKeyInfo.MessageEnd();
685 }
686
687 void PKCS8PrivateKey::DEREncode(BufferedTransformation &bt) const
688 {
689 DERSequenceEncoder privateKeyInfo(bt);
690 DEREncodeUnsigned<word32>(privateKeyInfo, 0); // version
691
692 DERSequenceEncoder algorithm(privateKeyInfo);
693 GetAlgorithmID().DEREncode(algorithm);
694 DEREncodeAlgorithmParameters(algorithm);
695 algorithm.MessageEnd();
696
697 DERGeneralEncoder octetString(privateKeyInfo, OCTET_STRING);
698 DEREncodePrivateKey(octetString);
699 octetString.MessageEnd();
700
701 DEREncodeOptionalAttributes(privateKeyInfo);
702 privateKeyInfo.MessageEnd();
703 }
704
705 void PKCS8PrivateKey::BERDecodeOptionalAttributes(BufferedTransformation &bt)
706 {
707 DERReencode(bt, m_optionalAttributes);
708 }
709
710 void PKCS8PrivateKey::DEREncodeOptionalAttributes(BufferedTransformation &bt) const
711 {
712 m_optionalAttributes.CopyTo(bt);
713 }
714
715 NAMESPACE_END
716
717 #endif
PKCS8PrivateKey::DEREncodeOptionalAttributes
virtual void DEREncodeOptionalAttributes(BufferedTransformation &bt) const
Encode optional attributes.
LazyPutter
use this to make sure LazyPut is finalized in event of exception
Definition: queue.h:126
BytePtrSize
size_t BytePtrSize(const std::string &str)
Size of a string.
Definition: misc.h:476
BERDecodeTextString
CRYPTOPP_DLL size_t BERDecodeTextString(BufferedTransformation &bt, SecByteBlock &str, byte asnTag)
BER decode text string.
BufferedTransformation::PeekWord16
size_t PeekWord16(word16 &value, ByteOrder order=BIG_ENDIAN_ORDER) const
Peek a 16-bit word.
RoundUpToMultipleOf
T1 RoundUpToMultipleOf(const T1 &n, const T2 &m)
Rounds a value up to a multiple of a second value.
Definition: misc.h:1154
DEREncodeBitString
CRYPTOPP_DLL size_t DEREncodeBitString(BufferedTransformation &bt, const byte *str, size_t strLen, unsigned int unusedBits=0)
DER encode bit string.
BERLengthDecode
CRYPTOPP_DLL bool BERLengthDecode(BufferedTransformation &bt, size_t &length)
BER decode a length.
OBJECT_IDENTIFIER
@ OBJECT_IDENTIFIER
ASN.1 Object identifier.
Definition: asn.h:42
EncodedObjectFilter::Put
void Put(const byte *inString, size_t length)
Input a byte buffer for processing.
ConstBytePtr
const byte * ConstBytePtr(const std::string &str)
Const pointer to the first element of a string.
Definition: misc.h:459
ByteQueue
Data structure used to store byte strings.
Definition: queue.h:18
BERDecodePeekLength
CRYPTOPP_DLL size_t BERDecodePeekLength(const BufferedTransformation &bt)
BER decode size.
DERSequenceEncoder
DER Sequence Encoder.
Definition: asn.h:556
DERGeneralEncoder
DER General Encoder.
Definition: asn.h:490
OID::BERDecode
void BERDecode(BufferedTransformation &bt)
BER decode an OID.
BufferedTransformation
Interface for buffered transformations.
Definition: cryptlib.h:1634
PKCS8PrivateKey::GetAlgorithmID
virtual OID GetAlgorithmID() const =0
Retrieves the OID of the algorithm.
BERGeneralDecoder::CopyRangeTo2
size_t CopyRangeTo2(BufferedTransformation &target, lword &begin, lword end=LWORD_MAX, const std::string &channel=DEFAULT_CHANNEL, bool blocking=true) const
Copy bytes to another BufferedTransformation.
SecByteBlock
SecBlock<byte> typedef.
Definition: secblock.h:1115
BERGeneralDecoder::MessageEnd
void MessageEnd()
Signals the end of messages to the object.
CRYPTOPP_ASSERT
#define CRYPTOPP_ASSERT(exp)
Debugging and diagnostic assertion.
Definition: trap.h:68
BufferedTransformation::Skip
virtual lword Skip(lword skipMax=LWORD_MAX)
Discard skipMax bytes from the output buffer.
X509PublicKey::BERDecodeAlgorithmParameters
virtual bool BERDecodeAlgorithmParameters(BufferedTransformation &bt)
Decode algorithm parameters.
Definition: asn.h:717
OID::DEREncode
void DEREncode(BufferedTransformation &bt) const
DER encode this OID.
BufferedTransformation::Put
size_t Put(byte inByte, bool blocking=true)
Input a byte for processing.
Definition: cryptlib.h:1656
BufferedTransformation::TransferAllTo
void TransferAllTo(BufferedTransformation &target, const std::string &channel=DEFAULT_CHANNEL)
Transfer all bytes from this object to another BufferedTransformation.
Definition: cryptlib.h:2076
BufferedTransformation::Get
virtual size_t Get(byte &outByte)
Retrieve a 8-bit byte.
X509PublicKey::GetAlgorithmID
virtual OID GetAlgorithmID() const =0
Retrieves the OID of the algorithm.
SafeConvert
bool SafeConvert(T1 from, T2 &to)
Tests whether a conversion from -> to is safe to perform.
Definition: misc.h:690
pch.h
Precompiled header file.
word32
unsigned int word32
32-bit unsigned datatype
Definition: config_int.h:62
BIT_STRING
@ BIT_STRING
ASN.1 Bit string.
Definition: asn.h:36
BERGeneralDecoder
BER General Decoder.
Definition: asn.h:379
OID
Object Identifier.
Definition: asn.h:264
PKCS8PrivateKey::DEREncodePrivateKey
virtual void DEREncodePrivateKey(BufferedTransformation &bt) const =0
Encode privateKey part of privateKeyInfo.
TheBitBucket
CRYPTOPP_DLL BufferedTransformation & TheBitBucket()
An input discarding BufferedTransformation.
SecBlock::resize
void resize(size_type newSize)
Change size and preserve contents.
Definition: secblock.h:1088
BERDecodeError
void BERDecodeError()
Raises a BERDecodeErr.
Definition: asn.h:104
BERDecodeBitString
CRYPTOPP_DLL size_t BERDecodeBitString(BufferedTransformation &bt, SecByteBlock &str, unsigned int &unusedBits)
DER decode bit string.
BytePrecision
unsigned int BytePrecision(const T &value)
Returns the number of 8-bit bytes or octets required for a value.
Definition: misc.h:799
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.
DEREncodeNull
CRYPTOPP_DLL void DEREncodeNull(BufferedTransformation &bt)
DER encode NULL.
Exception
Base class for all exceptions thrown by the library.
Definition: cryptlib.h:158
misc.h
Utility functions for the Crypto++ library.
Filter::AttachedTransformation
BufferedTransformation * AttachedTransformation()
Retrieve attached transformation.
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:1996
STDMIN
const T & STDMIN(const T &a, const T &b)
Replacement function for std::min.
Definition: misc.h:635
DERLengthEncode
CRYPTOPP_DLL size_t DERLengthEncode(BufferedTransformation &bt, lword length)
DER encode a length.
ByteQueue::Peek
size_t Peek(byte &outByte) const
Peek a 8-bit byte.
BERGeneralDecoder::BERGeneralDecoder
BERGeneralDecoder(BufferedTransformation &inQueue)
Construct an ASN.1 decoder.
STDMAX
const T & STDMAX(const T &a, const T &b)
Replacement function for std::max.
Definition: misc.h:646
PKCS8PrivateKey::BERDecodePrivateKey
virtual void BERDecodePrivateKey(BufferedTransformation &bt, bool parametersPresent, size_t size)=0
Decode privateKey part of privateKeyInfo.
BERGeneralDecoder::TransferTo2
size_t TransferTo2(BufferedTransformation &target, lword &transferBytes, const std::string &channel=DEFAULT_CHANNEL, bool blocking=true)
Transfer bytes to another BufferedTransformation.
asn.h
Classes and functions for working with ANS.1 objects.
BERGeneralDecoder::PeekByte
byte PeekByte() const
Determine next octet.
PKCS8PrivateKey::BERDecode
void BERDecode(BufferedTransformation &bt)
Decode this object from a BufferedTransformation.
BufferedTransformation::TransferTo
lword TransferTo(BufferedTransformation &target, lword transferMax=LWORD_MAX, const std::string &channel=DEFAULT_CHANNEL)
move transferMax bytes of the buffered output to target as input
Definition: cryptlib.h:1974
X509PublicKey::DEREncode
void DEREncode(BufferedTransformation &bt) const
Encode this object into a BufferedTransformation.
DERGeneralEncoder::MessageEnd
void MessageEnd()
Signals the end of messages to the object.
SecBlock::New
void New(size_type newSize)
Change size without preserving contents.
Definition: secblock.h:1022
PKCS8PrivateKey::DEREncode
void DEREncode(BufferedTransformation &bt) const
Encode this object into a BufferedTransformation.
DEREncodeOctetString
CRYPTOPP_DLL size_t DEREncodeOctetString(BufferedTransformation &bt, const byte *str, size_t strLen)
DER encode octet string.
BitPrecision
unsigned int BitPrecision(const T &value)
Returns the number of bits required for a value.
Definition: misc.h:822
DEREncodeDate
CRYPTOPP_DLL size_t DEREncodeDate(BufferedTransformation &bt, const SecByteBlock &str, byte asnTag)
DER encode date.
PKCS8PrivateKey::BERDecodeOptionalAttributes
virtual void BERDecodeOptionalAttributes(BufferedTransformation &bt)
Decode optional attributes.
SecBlock::size
size_type size() const
Provides the count of elements in the SecBlock.
Definition: secblock.h:849
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.
X509PublicKey::BERDecodePublicKey
virtual void BERDecodePublicKey(BufferedTransformation &bt, bool parametersPresent, size_t size)=0
Decode subjectPublicKey part of subjectPublicKeyInfo.
lword
word64 lword
Large word type.
Definition: config_int.h:158
PKCS8PrivateKey::DEREncodeAlgorithmParameters
virtual bool DEREncodeAlgorithmParameters(BufferedTransformation &bt) const
Encode optional parameters.
Definition: asn.h:770
ByteQueue::Walker
A ByteQueue iterator.
Definition: queue.h:76
ByteQueue::AnyRetrievable
bool AnyRetrievable() const
Determines whether bytes are ready for retrieval.
Definition: queue.h:35
PKCS8PrivateKey::BERDecodeAlgorithmParameters
virtual bool BERDecodeAlgorithmParameters(BufferedTransformation &bt)
Decode optional parameters.
Definition: asn.h:763
X509PublicKey::DEREncodePublicKey
virtual void DEREncodePublicKey(BufferedTransformation &bt) const =0
Encode subjectPublicKey part of subjectPublicKeyInfo.
BufferedTransformation::MessageSeriesEnd
virtual bool MessageSeriesEnd(int propagation=-1, bool blocking=true)
Marks the end of a series of messages, with signal propagation.
OCTET_STRING
@ OCTET_STRING
ASN.1 Octet string.
Definition: asn.h:38
CryptoPP
Crypto++ library namespace.
X509PublicKey::DEREncodeAlgorithmParameters
virtual bool DEREncodeAlgorithmParameters(BufferedTransformation &bt) const
Encode algorithm parameters.
Definition: asn.h:724
BufferedTransformation::MaxRetrievable
virtual lword MaxRetrievable() const
Provides the number of bytes ready for retrieval.
OID::Print
std::ostream & Print(std::ostream &out) const
Print an OID.
X509PublicKey::BERDecode
void BERDecode(BufferedTransformation &bt)
Decode this object from a BufferedTransformation.
BERDecodeOctetString
CRYPTOPP_DLL size_t BERDecodeOctetString(BufferedTransformation &bt, SecByteBlock &str)
BER decode octet string.
config.h
Library configuration file.
OID::BERDecodeAndCheck
void BERDecodeAndCheck(BufferedTransformation &bt) const
BER decode an OID.
DEREncodeTextString
CRYPTOPP_DLL size_t DEREncodeTextString(BufferedTransformation &bt, const byte *str, size_t strLen, byte asnTag)
DER encode text string.
BERDecodeNull
CRYPTOPP_DLL void BERDecodeNull(BufferedTransformation &bt)
BER decode NULL.
BufferedTransformation::MessageEnd
bool MessageEnd(int propagation=-1, bool blocking=true)
Signals the end of messages to the object.
Definition: cryptlib.h:1726
CONSTRUCTED
@ CONSTRUCTED
ASN.1 Constructed flag.
Definition: asn.h:94
BufferedTransformation::GetWord16
size_t GetWord16(word16 &value, ByteOrder order=BIG_ENDIAN_ORDER)
Retrieve a 16-bit word.
BERGeneralDecoder::CheckByte
void CheckByte(byte b)
Determine next octet.
ByteQueue::Get
size_t Get(byte &outByte)
Retrieve a 8-bit byte.
BufferedTransformation::Peek
virtual size_t Peek(byte &outByte) const
Peek a 8-bit byte.
BytePtr
byte * BytePtr(std::string &str)
Pointer to the first element of a string.
Definition: misc.h:437
DERGeneralEncoder::DERGeneralEncoder
DERGeneralEncoder(BufferedTransformation &outQueue)
Construct an ASN.1 encoder.
word16
unsigned short word16
16-bit unsigned datatype
Definition: config_int.h:59
TAG_NULL
@ TAG_NULL
ASN.1 Null.
Definition: asn.h:40
cryptlib.h
Abstract base classes that provide a uniform interface to this library.
BERGeneralDecoder::EndReached
bool EndReached() const
Determine end of stream.
BERSequenceDecoder
BER Sequence Decoder.
Definition: asn.h:524
DERReencode
CRYPTOPP_DLL void DERReencode(BufferedTransformation &bt, BufferedTransformation &dest)
BER decode and DER re-encode.
BERDecodeDate
CRYPTOPP_DLL size_t BERDecodeDate(BufferedTransformation &bt, SecByteBlock &str, byte asnTag)
BER decode date.
INTEGER
@ INTEGER
ASN.1 Integer.
Definition: asn.h:34