Crypto++ 8.1 Free C++ class library of cryptographic schemes

eccrypto.h
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1 // eccrypto.h - originally written and placed in the public domain by Wei Dai
2 // deterministic signatures added by by Douglas Roark
3
4 /// \file eccrypto.h
5 /// \brief Classes and functions for Elliptic Curves over prime and binary fields
6
7 #ifndef CRYPTOPP_ECCRYPTO_H
8 #define CRYPTOPP_ECCRYPTO_H
9
10 #include "config.h"
11 #include "cryptlib.h"
12 #include "pubkey.h"
13 #include "integer.h"
14 #include "asn.h"
15 #include "hmac.h"
16 #include "sha.h"
17 #include "gfpcrypt.h"
18 #include "dh.h"
19 #include "mqv.h"
20 #include "hmqv.h"
21 #include "fhmqv.h"
22 #include "ecp.h"
23 #include "ec2n.h"
24
25 #if CRYPTOPP_MSC_VERSION
26 # pragma warning(push)
27 # pragma warning(disable: 4231 4275)
28 #endif
29
30 NAMESPACE_BEGIN(CryptoPP)
31
32 /// \brief Elliptic Curve Parameters
33 /// \tparam EC elliptic curve field
34 /// \details This class corresponds to the ASN.1 sequence of the same name
35 /// in ANSI X9.62 and SEC 1. EC is currently defined for ECP and EC2N.
36 template <class EC>
37 class DL_GroupParameters_EC : public DL_GroupParametersImpl<EcPrecomputation<EC> >
38 {
39 typedef DL_GroupParameters_EC<EC> ThisClass;
40
41 public:
42 typedef EC EllipticCurve;
43 typedef typename EllipticCurve::Point Point;
44 typedef Point Element;
45 typedef IncompatibleCofactorMultiplication DefaultCofactorOption;
46
47 virtual ~DL_GroupParameters_EC() {}
48
49 /// \brief Construct an EC GroupParameters
50 DL_GroupParameters_EC() : m_compress(false), m_encodeAsOID(true) {}
51
52 /// \brief Construct an EC GroupParameters
53 /// \param oid the OID of a curve
54 DL_GroupParameters_EC(const OID &oid)
55 : m_compress(false), m_encodeAsOID(true) {Initialize(oid);}
56
57 /// \brief Construct an EC GroupParameters
58 /// \param ec the elliptic curve
59 /// \param G the base point
60 /// \param n the order of the base point
61 /// \param k the cofactor
62 DL_GroupParameters_EC(const EllipticCurve &ec, const Point &G, const Integer &n, const Integer &k = Integer::Zero())
63 : m_compress(false), m_encodeAsOID(true) {Initialize(ec, G, n, k);}
64
65 /// \brief Construct an EC GroupParameters
66 /// \param bt BufferedTransformation with group parameters
67 DL_GroupParameters_EC(BufferedTransformation &bt)
68 : m_compress(false), m_encodeAsOID(true) {BERDecode(bt);}
69
70 /// \brief Initialize an EC GroupParameters using {EC,G,n,k}
71 /// \param ec the elliptic curve
72 /// \param G the base point
73 /// \param n the order of the base point
74 /// \param k the cofactor
75 /// \details This Initialize() function overload initializes group parameters from existing parameters.
76 void Initialize(const EllipticCurve &ec, const Point &G, const Integer &n, const Integer &k = Integer::Zero())
77 {
78 this->m_groupPrecomputation.SetCurve(ec);
79 this->SetSubgroupGenerator(G);
80 m_n = n;
81 m_k = k;
82 }
83
84 /// \brief Initialize a DL_GroupParameters_EC {EC,G,n,k}
85 /// \param oid the OID of a curve
86 /// \details This Initialize() function overload initializes group parameters from existing parameters.
87 void Initialize(const OID &oid);
88
89 // NameValuePairs
90 bool GetVoidValue(const char *name, const std::type_info &valueType, void *pValue) const;
91 void AssignFrom(const NameValuePairs &source);
92
93 // GeneratibleCryptoMaterial interface
94 /// this implementation doesn't actually generate a curve, it just initializes the parameters with existing values
95 /*! parameters: (Curve, SubgroupGenerator, SubgroupOrder, Cofactor (optional)), or (GroupOID) */
96 void GenerateRandom(RandomNumberGenerator &rng, const NameValuePairs &alg);
97
98 // DL_GroupParameters
99 const DL_FixedBasePrecomputation<Element> & GetBasePrecomputation() const {return this->m_gpc;}
100 DL_FixedBasePrecomputation<Element> & AccessBasePrecomputation() {return this->m_gpc;}
101 const Integer & GetSubgroupOrder() const {return m_n;}
102 Integer GetCofactor() const;
103 bool ValidateGroup(RandomNumberGenerator &rng, unsigned int level) const;
104 bool ValidateElement(unsigned int level, const Element &element, const DL_FixedBasePrecomputation<Element> *precomp) const;
105 bool FastSubgroupCheckAvailable() const {return false;}
106 void EncodeElement(bool reversible, const Element &element, byte *encoded) const
107 {
108 if (reversible)
109 GetCurve().EncodePoint(encoded, element, m_compress);
110 else
111 element.x.Encode(encoded, GetEncodedElementSize(false));
112 }
113 virtual unsigned int GetEncodedElementSize(bool reversible) const
114 {
115 if (reversible)
116 return GetCurve().EncodedPointSize(m_compress);
117 else
118 return GetCurve().GetField().MaxElementByteLength();
119 }
120 Element DecodeElement(const byte *encoded, bool checkForGroupMembership) const
121 {
122 Point result;
123 if (!GetCurve().DecodePoint(result, encoded, GetEncodedElementSize(true)))
124 throw DL_BadElement();
125 if (checkForGroupMembership && !ValidateElement(1, result, NULLPTR))
126 throw DL_BadElement();
127 return result;
128 }
129 Integer ConvertElementToInteger(const Element &element) const;
130 Integer GetMaxExponent() const {return GetSubgroupOrder()-1;}
131 bool IsIdentity(const Element &element) const {return element.identity;}
132 void SimultaneousExponentiate(Element *results, const Element &base, const Integer *exponents, unsigned int exponentsCount) const;
133 static std::string CRYPTOPP_API StaticAlgorithmNamePrefix() {return "EC";}
134
135 // ASN1Key
136 OID GetAlgorithmID() const;
137
138 // used by MQV
139 Element MultiplyElements(const Element &a, const Element &b) const;
140 Element CascadeExponentiate(const Element &element1, const Integer &exponent1, const Element &element2, const Integer &exponent2) const;
141
142 // non-inherited
143
144 // enumerate OIDs for recommended parameters, use OID() to get first one
145 static OID CRYPTOPP_API GetNextRecommendedParametersOID(const OID &oid);
146
147 void BERDecode(BufferedTransformation &bt);
148 void DEREncode(BufferedTransformation &bt) const;
149
150 void SetPointCompression(bool compress) {m_compress = compress;}
151 bool GetPointCompression() const {return m_compress;}
152
153 void SetEncodeAsOID(bool encodeAsOID) {m_encodeAsOID = encodeAsOID;}
154 bool GetEncodeAsOID() const {return m_encodeAsOID;}
155
156 const EllipticCurve& GetCurve() const {return this->m_groupPrecomputation.GetCurve();}
157
158 bool operator==(const ThisClass &rhs) const
159 {return this->m_groupPrecomputation.GetCurve() == rhs.m_groupPrecomputation.GetCurve() && this->m_gpc.GetBase(this->m_groupPrecomputation) == rhs.m_gpc.GetBase(rhs.m_groupPrecomputation);}
160
161 protected:
162 unsigned int FieldElementLength() const {return GetCurve().GetField().MaxElementByteLength();}
163 unsigned int ExponentLength() const {return m_n.ByteCount();}
164
165 OID m_oid; // set if parameters loaded from a recommended curve
166 Integer m_n; // order of base point
167 mutable Integer m_k; // cofactor
168 mutable bool m_compress, m_encodeAsOID; // presentation details
169 };
170
171 /// \brief Elliptic Curve Discrete Log (DL) public key
172 /// \tparam EC elliptic curve field
173 template <class EC>
174 class DL_PublicKey_EC : public DL_PublicKeyImpl<DL_GroupParameters_EC<EC> >
175 {
176 public:
177 typedef typename EC::Point Element;
178
179 virtual ~DL_PublicKey_EC() {}
180
181 /// \brief Initialize an EC Public Key using {GP,Q}
182 /// \param params group parameters
183 /// \param Q the public point
184 /// \details This Initialize() function overload initializes a public key from existing parameters.
185 void Initialize(const DL_GroupParameters_EC<EC> &params, const Element &Q)
186 {this->AccessGroupParameters() = params; this->SetPublicElement(Q);}
187
188 /// \brief Initialize an EC Public Key using {EC,G,n,Q}
189 /// \param ec the elliptic curve
190 /// \param G the base point
191 /// \param n the order of the base point
192 /// \param Q the public point
193 /// \details This Initialize() function overload initializes a public key from existing parameters.
194 void Initialize(const EC &ec, const Element &G, const Integer &n, const Element &Q)
195 {this->AccessGroupParameters().Initialize(ec, G, n); this->SetPublicElement(Q);}
196
197 // X509PublicKey
198 void BERDecodePublicKey(BufferedTransformation &bt, bool parametersPresent, size_t size);
199 void DEREncodePublicKey(BufferedTransformation &bt) const;
200 };
201
202 /// \brief Elliptic Curve Discrete Log (DL) private key
203 /// \tparam EC elliptic curve field
204 template <class EC>
205 class DL_PrivateKey_EC : public DL_PrivateKeyImpl<DL_GroupParameters_EC<EC> >
206 {
207 public:
208 typedef typename EC::Point Element;
209
210 virtual ~DL_PrivateKey_EC();
211
212 /// \brief Initialize an EC Private Key using {GP,x}
213 /// \param params group parameters
214 /// \param x the private exponent
215 /// \details This Initialize() function overload initializes a private key from existing parameters.
216 void Initialize(const DL_GroupParameters_EC<EC> &params, const Integer &x)
217 {this->AccessGroupParameters() = params; this->SetPrivateExponent(x);}
218
219 /// \brief Initialize an EC Private Key using {EC,G,n,x}
220 /// \param ec the elliptic curve
221 /// \param G the base point
222 /// \param n the order of the base point
223 /// \param x the private exponent
224 /// \details This Initialize() function overload initializes a private key from existing parameters.
225 void Initialize(const EC &ec, const Element &G, const Integer &n, const Integer &x)
226 {this->AccessGroupParameters().Initialize(ec, G, n); this->SetPrivateExponent(x);}
227
228 /// \brief Create an EC private key
229 /// \param rng a RandomNumberGenerator derived class
230 /// \param params the EC group parameters
231 /// \details This function overload of Initialize() creates a new private key because it
232 /// takes a RandomNumberGenerator() as a parameter. If you have an existing keypair,
233 /// then use one of the other Initialize() overloads.
234 void Initialize(RandomNumberGenerator &rng, const DL_GroupParameters_EC<EC> &params)
235 {this->GenerateRandom(rng, params);}
236
237 /// \brief Create an EC private key
238 /// \param rng a RandomNumberGenerator derived class
239 /// \param ec the elliptic curve
240 /// \param G the base point
241 /// \param n the order of the base point
242 /// \details This function overload of Initialize() creates a new private key because it
243 /// takes a RandomNumberGenerator() as a parameter. If you have an existing keypair,
244 /// then use one of the other Initialize() overloads.
245 void Initialize(RandomNumberGenerator &rng, const EC &ec, const Element &G, const Integer &n)
246 {this->GenerateRandom(rng, DL_GroupParameters_EC<EC>(ec, G, n));}
247
248 // PKCS8PrivateKey
249 void BERDecodePrivateKey(BufferedTransformation &bt, bool parametersPresent, size_t size);
250 void DEREncodePrivateKey(BufferedTransformation &bt) const;
251 };
252
253 // Out-of-line dtor due to AIX and GCC, http://github.com/weidai11/cryptopp/issues/499
254 template<class EC>
255 DL_PrivateKey_EC<EC>::~DL_PrivateKey_EC() {}
256
257 /// \brief Elliptic Curve Diffie-Hellman
258 /// \tparam EC elliptic curve field
259 /// \tparam COFACTOR_OPTION cofactor multiplication option
260 /// \sa CofactorMultiplicationOption, <a href="http://www.weidai.com/scan-mirror/ka.html#ECDH">Elliptic Curve Diffie-Hellman, AKA ECDH</a>
261 /// \since Crypto++ 3.0
262 template <class EC, class COFACTOR_OPTION = typename DL_GroupParameters_EC<EC>::DefaultCofactorOption>
263 struct ECDH
264 {
265 typedef DH_Domain<DL_GroupParameters_EC<EC>, COFACTOR_OPTION> Domain;
266 };
267
268 /// \brief Elliptic Curve Menezes-Qu-Vanstone
269 /// \tparam EC elliptic curve field
270 /// \tparam COFACTOR_OPTION cofactor multiplication option
271 /// \sa CofactorMultiplicationOption, <a href="http://www.weidai.com/scan-mirror/ka.html#ECMQV">Elliptic Curve Menezes-Qu-Vanstone, AKA ECMQV</a>
272 template <class EC, class COFACTOR_OPTION = typename DL_GroupParameters_EC<EC>::DefaultCofactorOption>
273 struct ECMQV
274 {
275 typedef MQV_Domain<DL_GroupParameters_EC<EC>, COFACTOR_OPTION> Domain;
276 };
277
278 /// \brief Hashed Elliptic Curve Menezes-Qu-Vanstone
279 /// \tparam EC elliptic curve field
280 /// \tparam COFACTOR_OPTION cofactor multiplication option
281 /// \details This implementation follows Hugo Krawczyk's <a href="http://eprint.iacr.org/2005/176">HMQV: A High-Performance
282 /// Secure Diffie-Hellman Protocol</a>. Note: this implements HMQV only. HMQV-C with Key Confirmation is not provided.
283 /// \sa CofactorMultiplicationOption
284 template <class EC, class COFACTOR_OPTION = typename DL_GroupParameters_EC<EC>::DefaultCofactorOption, class HASH = SHA256>
285 struct ECHMQV
286 {
287 typedef HMQV_Domain<DL_GroupParameters_EC<EC>, COFACTOR_OPTION, HASH> Domain;
288 };
289
290 typedef ECHMQV< ECP, DL_GroupParameters_EC< ECP >::DefaultCofactorOption, SHA1 >::Domain ECHMQV160;
291 typedef ECHMQV< ECP, DL_GroupParameters_EC< ECP >::DefaultCofactorOption, SHA256 >::Domain ECHMQV256;
292 typedef ECHMQV< ECP, DL_GroupParameters_EC< ECP >::DefaultCofactorOption, SHA384 >::Domain ECHMQV384;
293 typedef ECHMQV< ECP, DL_GroupParameters_EC< ECP >::DefaultCofactorOption, SHA512 >::Domain ECHMQV512;
294
295 /// \brief Fully Hashed Elliptic Curve Menezes-Qu-Vanstone
296 /// \tparam EC elliptic curve field
297 /// \tparam COFACTOR_OPTION cofactor multiplication option
298 /// \details This implementation follows Augustin P. Sarr and Philippe Elbaz–Vincent, and Jean–Claude Bajard's
299 /// <a href="http://eprint.iacr.org/2009/408">A Secure and Efficient Authenticated Diffie-Hellman Protocol</a>.
300 /// Note: this is FHMQV, Protocol 5, from page 11; and not FHMQV-C.
301 /// \sa CofactorMultiplicationOption
302 template <class EC, class COFACTOR_OPTION = typename DL_GroupParameters_EC<EC>::DefaultCofactorOption, class HASH = SHA256>
303 struct ECFHMQV
304 {
305 typedef FHMQV_Domain<DL_GroupParameters_EC<EC>, COFACTOR_OPTION, HASH> Domain;
306 };
307
308 typedef ECFHMQV< ECP, DL_GroupParameters_EC< ECP >::DefaultCofactorOption, SHA1 >::Domain ECFHMQV160;
309 typedef ECFHMQV< ECP, DL_GroupParameters_EC< ECP >::DefaultCofactorOption, SHA256 >::Domain ECFHMQV256;
310 typedef ECFHMQV< ECP, DL_GroupParameters_EC< ECP >::DefaultCofactorOption, SHA384 >::Domain ECFHMQV384;
311 typedef ECFHMQV< ECP, DL_GroupParameters_EC< ECP >::DefaultCofactorOption, SHA512 >::Domain ECFHMQV512;
312
313 /// \brief Elliptic Curve Discrete Log (DL) keys
314 /// \tparam EC elliptic curve field
315 template <class EC>
316 struct DL_Keys_EC
317 {
318 typedef DL_PublicKey_EC<EC> PublicKey;
319 typedef DL_PrivateKey_EC<EC> PrivateKey;
320 };
321
322 // Forward declaration; documented below
323 template <class EC, class H>
324 struct ECDSA;
325
326 /// \brief Elliptic Curve DSA keys
327 /// \tparam EC elliptic curve field
328 /// \since Crypto++ 3.2
329 template <class EC>
330 struct DL_Keys_ECDSA
331 {
332 typedef DL_PublicKey_EC<EC> PublicKey;
333 typedef DL_PrivateKey_WithSignaturePairwiseConsistencyTest<DL_PrivateKey_EC<EC>, ECDSA<EC, SHA256> > PrivateKey;
334 };
335
336 /// \brief Elliptic Curve DSA (ECDSA) signature algorithm
337 /// \tparam EC elliptic curve field
338 /// \since Crypto++ 3.2
339 template <class EC>
340 class DL_Algorithm_ECDSA : public DL_Algorithm_GDSA<typename EC::Point>
341 {
342 public:
343 CRYPTOPP_STATIC_CONSTEXPR const char* CRYPTOPP_API StaticAlgorithmName() {return "ECDSA";}
344 };
345
346 /// \brief Elliptic Curve DSA (ECDSA) signature algorithm based on RFC 6979
347 /// \tparam EC elliptic curve field
348 /// \sa <a href="http://tools.ietf.org/rfc/rfc6979.txt">RFC 6979, Deterministic Usage of the
349 /// Digital Signature Algorithm (DSA) and Elliptic Curve Digital Signature Algorithm (ECDSA)</a>
350 /// \since Crypto++ 6.0
351 template <class EC, class H>
352 class DL_Algorithm_ECDSA_RFC6979 : public DL_Algorithm_DSA_RFC6979<typename EC::Point, H>
353 {
354 public:
355 CRYPTOPP_STATIC_CONSTEXPR const char* CRYPTOPP_API StaticAlgorithmName() {return "ECDSA-RFC6979";}
356 };
357
358 /// \brief Elliptic Curve NR (ECNR) signature algorithm
359 /// \tparam EC elliptic curve field
360 template <class EC>
361 class DL_Algorithm_ECNR : public DL_Algorithm_NR<typename EC::Point>
362 {
363 public:
364 CRYPTOPP_STATIC_CONSTEXPR const char* CRYPTOPP_API StaticAlgorithmName() {return "ECNR";}
365 };
366
367 /// \brief Elliptic Curve DSA (ECDSA) signature scheme
368 /// \tparam EC elliptic curve field
369 /// \tparam H HashTransformation derived class
370 /// \sa <a href="http://www.weidai.com/scan-mirror/sig.html#ECDSA">ECDSA</a>
371 /// \since Crypto++ 3.2
372 template <class EC, class H>
373 struct ECDSA : public DL_SS<DL_Keys_ECDSA<EC>, DL_Algorithm_ECDSA<EC>, DL_SignatureMessageEncodingMethod_DSA, H>
374 {
375 };
376
377 /// \brief Elliptic Curve DSA (ECDSA) deterministic signature scheme
378 /// \tparam EC elliptic curve field
379 /// \tparam H HashTransformation derived class
380 /// \sa <a href="http://tools.ietf.org/rfc/rfc6979.txt">Deterministic Usage of the
381 /// Digital Signature Algorithm (DSA) and Elliptic Curve Digital Signature Algorithm (ECDSA)</a>
382 /// \since Crypto++ 6.0
383 template <class EC, class H>
384 struct ECDSA_RFC6979 : public DL_SS<
385 DL_Keys_ECDSA<EC>,
386 DL_Algorithm_ECDSA_RFC6979<EC, H>,
387 DL_SignatureMessageEncodingMethod_DSA,
388 H,
389 ECDSA_RFC6979<EC,H> >
390 {
391 static std::string CRYPTOPP_API StaticAlgorithmName() {return std::string("ECDSA-RFC6979/") + H::StaticAlgorithmName();}
392 };
393
394 /// \brief Elliptic Curve NR (ECNR) signature scheme
395 /// \tparam EC elliptic curve field
396 /// \tparam H HashTransformation derived class
397 template <class EC, class H = SHA1>
398 struct ECNR : public DL_SS<DL_Keys_EC<EC>, DL_Algorithm_ECNR<EC>, DL_SignatureMessageEncodingMethod_NR, H>
399 {
400 };
401
402 // ******************************************
403
404 template <class EC>
405 class DL_PublicKey_ECGDSA;
406 template <class EC>
407 class DL_PrivateKey_ECGDSA;
408
409 /// \brief Elliptic Curve German DSA key for ISO/IEC 15946
410 /// \tparam EC elliptic curve field
411 /// \sa ECGDSA
412 /// \since Crypto++ 6.0
413 template <class EC>
414 class DL_PrivateKey_ECGDSA : public DL_PrivateKeyImpl<DL_GroupParameters_EC<EC> >
415 {
416 public:
417 typedef typename EC::Point Element;
418
419 virtual ~DL_PrivateKey_ECGDSA() {}
420
421 /// \brief Initialize an EC Private Key using {GP,x}
422 /// \param params group parameters
423 /// \param x the private exponent
424 /// \details This Initialize() function overload initializes a private key from existing parameters.
425 void Initialize(const DL_GroupParameters_EC<EC> &params, const Integer &x)
426 {
427 this->AccessGroupParameters() = params;
428 this->SetPrivateExponent(x);
429 CRYPTOPP_ASSERT(x>=1 && x<=params.GetSubgroupOrder()-1);
430 }
431
432 /// \brief Initialize an EC Private Key using {EC,G,n,x}
433 /// \param ec the elliptic curve
434 /// \param G the base point
435 /// \param n the order of the base point
436 /// \param x the private exponent
437 /// \details This Initialize() function overload initializes a private key from existing parameters.
438 void Initialize(const EC &ec, const Element &G, const Integer &n, const Integer &x)
439 {
440 this->AccessGroupParameters().Initialize(ec, G, n);
441 this->SetPrivateExponent(x);
442 CRYPTOPP_ASSERT(x>=1 && x<=this->AccessGroupParameters().GetSubgroupOrder()-1);
443 }
444
445 /// \brief Create an EC private key
446 /// \param rng a RandomNumberGenerator derived class
447 /// \param params the EC group parameters
448 /// \details This function overload of Initialize() creates a new private key because it
449 /// takes a RandomNumberGenerator() as a parameter. If you have an existing keypair,
450 /// then use one of the other Initialize() overloads.
451 void Initialize(RandomNumberGenerator &rng, const DL_GroupParameters_EC<EC> &params)
452 {this->GenerateRandom(rng, params);}
453
454 /// \brief Create an EC private key
455 /// \param rng a RandomNumberGenerator derived class
456 /// \param ec the elliptic curve
457 /// \param G the base point
458 /// \param n the order of the base point
459 /// \details This function overload of Initialize() creates a new private key because it
460 /// takes a RandomNumberGenerator() as a parameter. If you have an existing keypair,
461 /// then use one of the other Initialize() overloads.
462 void Initialize(RandomNumberGenerator &rng, const EC &ec, const Element &G, const Integer &n)
463 {this->GenerateRandom(rng, DL_GroupParameters_EC<EC>(ec, G, n));}
464
465 virtual void MakePublicKey(DL_PublicKey_ECGDSA<EC> &pub) const
466 {
467 const DL_GroupParameters<Element>& params = this->GetAbstractGroupParameters();
468 pub.AccessAbstractGroupParameters().AssignFrom(params);
469 const Integer &xInv = this->GetPrivateExponent().InverseMod(params.GetSubgroupOrder());
470 pub.SetPublicElement(params.ExponentiateBase(xInv));
471 CRYPTOPP_ASSERT(xInv.NotZero());
472 }
473
474 virtual bool GetVoidValue(const char *name, const std::type_info &valueType, void *pValue) const
475 {
476 return GetValueHelper<DL_PrivateKey_ECGDSA<EC>,
477 DL_PrivateKey_ECGDSA<EC> >(this, name, valueType, pValue).Assignable();
478 }
479
480 virtual void AssignFrom(const NameValuePairs &source)
481 {
482 AssignFromHelper<DL_PrivateKey_ECGDSA<EC>,
483 DL_PrivateKey_ECGDSA<EC> >(this, source);
484 }
485
486 // PKCS8PrivateKey
487 void BERDecodePrivateKey(BufferedTransformation &bt, bool parametersPresent, size_t size);
488 void DEREncodePrivateKey(BufferedTransformation &bt) const;
489 };
490
491 /// \brief Elliptic Curve German DSA key for ISO/IEC 15946
492 /// \tparam EC elliptic curve field
493 /// \sa ECGDSA
494 /// \since Crypto++ 6.0
495 template <class EC>
496 class DL_PublicKey_ECGDSA : public DL_PublicKeyImpl<DL_GroupParameters_EC<EC> >
497 {
498 typedef DL_PublicKey_ECGDSA<EC> ThisClass;
499
500 public:
501 typedef typename EC::Point Element;
502
503 virtual ~DL_PublicKey_ECGDSA() {}
504
505 /// \brief Initialize an EC Public Key using {GP,Q}
506 /// \param params group parameters
507 /// \param Q the public point
508 /// \details This Initialize() function overload initializes a public key from existing parameters.
509 void Initialize(const DL_GroupParameters_EC<EC> &params, const Element &Q)
510 {this->AccessGroupParameters() = params; this->SetPublicElement(Q);}
511
512 /// \brief Initialize an EC Public Key using {EC,G,n,Q}
513 /// \param ec the elliptic curve
514 /// \param G the base point
515 /// \param n the order of the base point
516 /// \param Q the public point
517 /// \details This Initialize() function overload initializes a public key from existing parameters.
518 void Initialize(const EC &ec, const Element &G, const Integer &n, const Element &Q)
519 {this->AccessGroupParameters().Initialize(ec, G, n); this->SetPublicElement(Q);}
520
521 virtual void AssignFrom(const NameValuePairs &source)
522 {
523 DL_PrivateKey_ECGDSA<EC> *pPrivateKey = NULLPTR;
524 if (source.GetThisPointer(pPrivateKey))
525 pPrivateKey->MakePublicKey(*this);
526 else
527 {
528 this->AccessAbstractGroupParameters().AssignFrom(source);
529 AssignFromHelper(this, source)
530 CRYPTOPP_SET_FUNCTION_ENTRY(PublicElement);
531 }
532 }
533
534 // DL_PublicKey<T>
535 virtual void SetPublicElement(const Element &y)
536 {this->AccessPublicPrecomputation().SetBase(this->GetAbstractGroupParameters().GetGroupPrecomputation(), y);}
537
538 // X509PublicKey
539 void BERDecodePublicKey(BufferedTransformation &bt, bool parametersPresent, size_t size);
540 void DEREncodePublicKey(BufferedTransformation &bt) const;
541 };
542
543 /// \brief Elliptic Curve German DSA keys for ISO/IEC 15946
544 /// \tparam EC elliptic curve field
545 /// \sa ECGDSA
546 /// \since Crypto++ 6.0
547 template <class EC>
548 struct DL_Keys_ECGDSA
549 {
550 typedef DL_PublicKey_ECGDSA<EC> PublicKey;
551 typedef DL_PrivateKey_ECGDSA<EC> PrivateKey;
552 };
553
554 /// \brief Elliptic Curve German DSA signature algorithm
555 /// \tparam EC elliptic curve field
556 /// \sa ECGDSA
557 /// \since Crypto++ 6.0
558 template <class EC>
559 class DL_Algorithm_ECGDSA : public DL_Algorithm_GDSA_ISO15946<typename EC::Point>
560 {
561 public:
562 CRYPTOPP_STATIC_CONSTEXPR const char* CRYPTOPP_API StaticAlgorithmName() {return "ECGDSA";}
563 };
564
565 /// \brief Elliptic Curve German Digital Signature Algorithm signature scheme
566 /// \tparam EC elliptic curve field
567 /// \tparam H HashTransformation derived class
568 /// \sa Erwin Hess, Marcus Schafheutle, and Pascale Serf <A
569 /// HREF="http://www.teletrust.de/fileadmin/files/oid/ecgdsa_final.pdf">The Digital Signature Scheme
570 /// ECGDSA (October 24, 2006)</A>
571 /// \since Crypto++ 6.0
572 template <class EC, class H>
573 struct ECGDSA : public DL_SS<
574 DL_Keys_ECGDSA<EC>,
575 DL_Algorithm_ECGDSA<EC>,
576 DL_SignatureMessageEncodingMethod_DSA,
577 H>
578 {
579 static std::string CRYPTOPP_API StaticAlgorithmName() {return std::string("ECGDSA-ISO15946/") + H::StaticAlgorithmName();}
580 };
581
582 // ******************************************
583
584 /// \brief Elliptic Curve Integrated Encryption Scheme
585 /// \tparam COFACTOR_OPTION cofactor multiplication option
586 /// \tparam HASH HashTransformation derived class used for key drivation and MAC computation
587 /// \tparam DHAES_MODE flag indicating if the MAC includes additional context parameters such as <em>u·V</em>, <em>v·U</em> and label
588 /// \tparam LABEL_OCTETS flag indicating if the label size is specified in octets or bits
589 /// \details ECIES is an Elliptic Curve based Integrated Encryption Scheme (IES). The scheme combines a Key Encapsulation
590 /// Method (KEM) with a Data Encapsulation Method (DEM) and a MAC tag. The scheme is
591 /// <A HREF="http://en.wikipedia.org/wiki/ciphertext_indistinguishability">IND-CCA2</A>, which is a strong notion of security.
592 /// You should prefer an Integrated Encryption Scheme over homegrown schemes.
593 /// \details The library's original implementation is based on an early P1363 draft, which itself appears to be based on an early Certicom
594 /// SEC-1 draft (or an early SEC-1 draft was based on a P1363 draft). Crypto++ 4.2 used the early draft in its Integrated Ecryption
595 /// Schemes with <tt>NoCofactorMultiplication</tt>, <tt>DHAES_MODE=false</tt> and <tt>LABEL_OCTETS=true</tt>.
596 /// \details If you desire an Integrated Encryption Scheme with Crypto++ 4.2 compatibility, then use the ECIES template class with
597 /// <tt>NoCofactorMultiplication</tt>, <tt>DHAES_MODE=false</tt> and <tt>LABEL_OCTETS=true</tt>.
598 /// \details If you desire an Integrated Encryption Scheme with Bouncy Castle 1.54 and Botan 1.11 compatibility, then use the ECIES
599 /// template class with <tt>NoCofactorMultiplication</tt>, <tt>DHAES_MODE=true</tt> and <tt>LABEL_OCTETS=false</tt>.
600 /// \details The default template parameters ensure compatibility with Bouncy Castle 1.54 and Botan 1.11. The combination of
601 /// <tt>IncompatibleCofactorMultiplication</tt> and <tt>DHAES_MODE=true</tt> is recommended for best efficiency and security.
602 /// SHA1 is used for compatibility reasons, but it can be changed if desired. SHA-256 or another hash will likely improve the
603 /// security provided by the MAC. The hash is also used in the key derivation function as a PRF.
604 /// \details Below is an example of constructing a Crypto++ 4.2 compatible ECIES encryptor and decryptor.
605 /// <pre>
606 /// AutoSeededRandomPool prng;
607 /// DL_PrivateKey_EC<ECP> key;
608 /// key.Initialize(prng, ASN1::secp160r1());
609 ///
610 /// ECIES<ECP,SHA1,NoCofactorMultiplication,true,true>::Decryptor decryptor(key);
611 /// ECIES<ECP,SHA1,NoCofactorMultiplication,true,true>::Encryptor encryptor(decryptor);
612 /// </pre>
613 /// \sa DLIES, <a href="http://www.weidai.com/scan-mirror/ca.html#ECIES">Elliptic Curve Integrated Encryption Scheme (ECIES)</a>,
614 /// Martínez, Encinas, and Ávila's <A HREF="http://digital.csic.es/bitstream/10261/32671/1/V2-I2-P7-13.pdf">A Survey of the Elliptic
615 /// Curve Integrated Encryption Schemes</A>
616 /// \since Crypto++ 4.0, Crypto++ 5.7 for Bouncy Castle and Botan compatibility
617 template <class EC, class HASH = SHA1, class COFACTOR_OPTION = NoCofactorMultiplication, bool DHAES_MODE = true, bool LABEL_OCTETS = false>
618 struct ECIES
619 : public DL_ES<
620 DL_Keys_EC<EC>,
621 DL_KeyAgreementAlgorithm_DH<typename EC::Point, COFACTOR_OPTION>,
622 DL_KeyDerivationAlgorithm_P1363<typename EC::Point, DHAES_MODE, P1363_KDF2<HASH> >,
623 DL_EncryptionAlgorithm_Xor<HMAC<HASH>, DHAES_MODE, LABEL_OCTETS>,
624 ECIES<EC> >
625 {
626 // TODO: fix this after name is standardized
627 CRYPTOPP_STATIC_CONSTEXPR const char* CRYPTOPP_API StaticAlgorithmName() {return "ECIES";}
628 };
629
630 NAMESPACE_END
631
632 #ifdef CRYPTOPP_MANUALLY_INSTANTIATE_TEMPLATES
633 #include "eccrypto.cpp"
634 #endif
635
636 NAMESPACE_BEGIN(CryptoPP)
637
638 CRYPTOPP_DLL_TEMPLATE_CLASS DL_GroupParameters_EC<ECP>;
639 CRYPTOPP_DLL_TEMPLATE_CLASS DL_GroupParameters_EC<EC2N>;
640 CRYPTOPP_DLL_TEMPLATE_CLASS DL_PublicKeyImpl<DL_GroupParameters_EC<ECP> >;
641 CRYPTOPP_DLL_TEMPLATE_CLASS DL_PublicKeyImpl<DL_GroupParameters_EC<EC2N> >;
642 CRYPTOPP_DLL_TEMPLATE_CLASS DL_PublicKey_EC<ECP>;
643 CRYPTOPP_DLL_TEMPLATE_CLASS DL_PublicKey_EC<EC2N>;
644 CRYPTOPP_DLL_TEMPLATE_CLASS DL_PublicKey_ECGDSA<ECP>;
645 CRYPTOPP_DLL_TEMPLATE_CLASS DL_PublicKey_ECGDSA<EC2N>;
646 CRYPTOPP_DLL_TEMPLATE_CLASS DL_PrivateKeyImpl<DL_GroupParameters_EC<ECP> >;
647 CRYPTOPP_DLL_TEMPLATE_CLASS DL_PrivateKeyImpl<DL_GroupParameters_EC<EC2N> >;
648 CRYPTOPP_DLL_TEMPLATE_CLASS DL_PrivateKey_EC<ECP>;
649 CRYPTOPP_DLL_TEMPLATE_CLASS DL_PrivateKey_EC<EC2N>;
650 CRYPTOPP_DLL_TEMPLATE_CLASS DL_PrivateKey_ECGDSA<ECP>;
651 CRYPTOPP_DLL_TEMPLATE_CLASS DL_PrivateKey_ECGDSA<EC2N>;
652 CRYPTOPP_DLL_TEMPLATE_CLASS DL_Algorithm_GDSA<ECP::Point>;
653 CRYPTOPP_DLL_TEMPLATE_CLASS DL_Algorithm_GDSA<EC2N::Point>;
654 CRYPTOPP_DLL_TEMPLATE_CLASS DL_PrivateKey_WithSignaturePairwiseConsistencyTest<DL_PrivateKey_EC<ECP>, ECDSA<ECP, SHA256> >;
655 CRYPTOPP_DLL_TEMPLATE_CLASS DL_PrivateKey_WithSignaturePairwiseConsistencyTest<DL_PrivateKey_EC<EC2N>, ECDSA<EC2N, SHA256> >;
656
657 NAMESPACE_END
658
659 #if CRYPTOPP_MSC_VERSION
660 # pragma warning(pop)
661 #endif
662
663 #endif
SHA384
SHA-384 message digest.
Definition: sha.h:176
Integer::NotZero
bool NotZero() const
Determines if the Integer is non-0.
Definition: integer.h:333
DL_Algorithm_ECGDSA
Elliptic Curve German DSA signature algorithm.
Definition: eccrypto.h:559
DL_PrivateKey_ECGDSA::Initialize
void Initialize(const EC &ec, const Element &G, const Integer &n, const Integer &x)
Initialize an EC Private Key using {EC,G,n,x}.
Definition: eccrypto.h:438
DL_PublicKey_EC::DEREncodePublicKey
void DEREncodePublicKey(BufferedTransformation &bt) const
encode subjectPublicKey part of subjectPublicKeyInfo, without the BIT STRING header ...
Definition: eccrypto.cpp:700
fhmqv.h
Classes for Fully Hashed Menezes-Qu-Vanstone key agreement in GF(p)
DL_GroupParameters_EC::ValidateGroup
bool ValidateGroup(RandomNumberGenerator &rng, unsigned int level) const
Check the group for errors.
Definition: eccrypto.cpp:611
DL_PublicKey_ECGDSA::Initialize
void Initialize(const EC &ec, const Element &G, const Integer &n, const Element &Q)
Initialize an EC Public Key using {EC,G,n,Q}.
Definition: eccrypto.h:518
DL_PublicKey_ECGDSA
Elliptic Curve German DSA key for ISO/IEC 15946.
Definition: eccrypto.h:405
DL_PublicKey_ECGDSA::DEREncodePublicKey
void DEREncodePublicKey(BufferedTransformation &bt) const
encode subjectPublicKey part of subjectPublicKeyInfo, without the BIT STRING header ...
Definition: eccrypto.cpp:771
DL_GroupParameters_EC::DL_GroupParameters_EC
DL_GroupParameters_EC()
Construct an EC GroupParameters.
Definition: eccrypto.h:50
DL_PrivateKeyImpl< DL_GroupParameters_EC< EC > >::SetPrivateExponent
void SetPrivateExponent(const Integer &x)
Definition: pubkey.h:1264
DL_GroupParameters_EC::AssignFrom
void AssignFrom(const NameValuePairs &source)
Assign values to this object.
Definition: eccrypto.cpp:511
SHA256
SHA-256 message digest.
Definition: sha.h:64
DL_GroupParameters_EC::GetMaxExponent
Integer GetMaxExponent() const
Retrieves the maximum exponent for the group.
Definition: eccrypto.h:130
DL_PrivateKey_ECGDSA::DEREncodePrivateKey
void DEREncodePrivateKey(BufferedTransformation &bt) const
encode privateKey part of privateKeyInfo, without the OCTET STRING header
Definition: eccrypto.cpp:818
DL_PrivateKey_EC::Initialize
void Initialize(RandomNumberGenerator &rng, const EC &ec, const Element &G, const Integer &n)
Create an EC private key.
Definition: eccrypto.h:245
DL_PrivateKey_WithSignaturePairwiseConsistencyTest
Definition: pubkey.h:1277
pubkey.h
This file contains helper classes/functions for implementing public key algorithms.
DL_Keys_ECDSA
Elliptic Curve DSA keys.
Definition: eccrypto.h:330
ecp.h
Classes for Elliptic Curves over prime fields.
DL_GroupParameters< typename EcPrecomputation< EC > ::Element >::SetSubgroupGenerator
virtual void SetSubgroupGenerator(const Element &base)
Sets the subgroup generator.
Definition: pubkey.h:834
FHMQV_Domain
Fully Hashed Menezes-Qu-Vanstone in GF(p)
Definition: fhmqv.h:24
ECFHMQV
Fully Hashed Elliptic Curve Menezes-Qu-Vanstone.
Definition: eccrypto.h:303
DL_GroupParameters
Interface for Discrete Log (DL) group parameters.
Definition: pubkey.h:753
ECDSA
Elliptic Curve DSA (ECDSA) signature scheme.
Definition: eccrypto.h:324
DL_PrivateKey_ECGDSA::Initialize
void Initialize(RandomNumberGenerator &rng, const DL_GroupParameters_EC< EC > &params)
Create an EC private key.
Definition: eccrypto.h:451
EnumToType
Converts an enumeration to a type suitable for use as a template parameter.
Definition: cryptlib.h:135
cryptlib.h
Abstract base classes that provide a uniform interface to this library.
DL_PublicKeyImpl< DL_GroupParameters_EC< EC > >::GetAbstractGroupParameters
const DL_GroupParameters< Element > & GetAbstractGroupParameters() const
Definition: pubkey.h:1344
HMQV_Domain
Hashed Menezes-Qu-Vanstone in GF(p)
Definition: hmqv.h:23
DL_Keys_EC
Elliptic Curve Discrete Log (DL) keys.
Definition: eccrypto.h:316
DL_PublicKey_EC
Elliptic Curve Discrete Log (DL) public key.
Definition: eccrypto.h:174
DL_GroupParameters_EC::AccessBasePrecomputation
DL_FixedBasePrecomputation< Element > & AccessBasePrecomputation()
Retrieves the group precomputation.
Definition: eccrypto.h:100
DL_PublicKey_ECGDSA::AssignFrom
virtual void AssignFrom(const NameValuePairs &source)
Assign values to this object.
Definition: eccrypto.h:521
config.h
Library configuration file.
RandomNumberGenerator
Interface for random number generators.
Definition: cryptlib.h:1383
DL_GroupParameters_EC::GenerateRandom
void GenerateRandom(RandomNumberGenerator &rng, const NameValuePairs &alg)
this implementation doesn&#39;t actually generate a curve, it just initializes the parameters with existi...
Definition: eccrypto.cpp:532
DL_PrivateKey_EC
Elliptic Curve Discrete Log (DL) private key.
Definition: eccrypto.h:205
Integer::InverseMod
Integer InverseMod(const Integer &n) const
Calculate multiplicative inverse.
Definition: integer.cpp:4421
DL_ES
Discrete Log (DL) encryption scheme.
Definition: pubkey.h:2298
DL_GroupParameters_EC::GetSubgroupOrder
const Integer & GetSubgroupOrder() const
Retrieves the subgroup order.
Definition: eccrypto.h:101
BufferedTransformation
Interface for buffered transformations.
Definition: cryptlib.h:1598
DL_GroupParameters::ExponentiateBase
virtual Element ExponentiateBase(const Integer &exponent) const
Exponentiates the base.
Definition: pubkey.h:839
hmqv.h
Classes for Hashed Menezes-Qu-Vanstone key agreement in GF(p)
ECGDSA
Elliptic Curve German Digital Signature Algorithm signature scheme.
Definition: eccrypto.h:573
DL_GroupParameters_EC::GetCofactor
Integer GetCofactor() const
Retrieves the cofactor.
Definition: eccrypto.cpp:592
DL_PrivateKey_ECGDSA
Elliptic Curve German DSA key for ISO/IEC 15946.
Definition: eccrypto.h:407
DL_PublicKey< DL_GroupParameters_EC< EC > ::Element >::SetPublicElement
virtual void SetPublicElement(const Element &y)
Sets the public element.
Definition: pubkey.h:1063
DL_SS
Discrete Log (DL) signature scheme.
Definition: pubkey.h:2275
ec2n.h
Classes for Elliptic Curves over binary fields.
Integer::ByteCount
unsigned int ByteCount() const
Determines the number of bytes required to represent the Integer.
Definition: integer.cpp:3336
DL_PrivateKeyImpl
Discrete Log (DL) private key base implementation.
Definition: pubkey.h:1208
hmac.h
Classes for HMAC message authentication codes.
DL_GroupParameters_EC::GetVoidValue
bool GetVoidValue(const char *name, const std::type_info &valueType, void *pValue) const
Get a named value.
Definition: eccrypto.cpp:494
DL_PrivateKey_ECGDSA::GetVoidValue
virtual bool GetVoidValue(const char *name, const std::type_info &valueType, void *pValue) const
Get a named value.
Definition: eccrypto.h:474
DL_PrivateKey_ECGDSA::Initialize
void Initialize(RandomNumberGenerator &rng, const EC &ec, const Element &G, const Integer &n)
Create an EC private key.
Definition: eccrypto.h:462
DL_PublicKey_ECGDSA::BERDecodePublicKey
void BERDecodePublicKey(BufferedTransformation &bt, bool parametersPresent, size_t size)
decode subjectPublicKey part of subjectPublicKeyInfo, without the BIT STRING header ...
Definition: eccrypto.cpp:760
DL_GroupParameters_EC::DL_GroupParameters_EC
DL_GroupParameters_EC(const EllipticCurve &ec, const Point &G, const Integer &n, const Integer &k=Integer::Zero())
Construct an EC GroupParameters.
Definition: eccrypto.h:62
MQV_Domain
MQV domain for performing authenticated key agreement.
Definition: mqv.h:28
ECHMQV
Hashed Elliptic Curve Menezes-Qu-Vanstone.
Definition: eccrypto.h:285
dh.h
Classes for Diffie-Hellman key exchange.
DL_PublicKey_EC::Initialize
void Initialize(const DL_GroupParameters_EC< EC > &params, const Element &Q)
Initialize an EC Public Key using {GP,Q}.
Definition: eccrypto.h:185
SHA512
SHA-512 message digest.
Definition: sha.h:141
DL_PrivateKey_EC::Initialize
void Initialize(const EC &ec, const Element &G, const Integer &n, const Integer &x)
Initialize an EC Private Key using {EC,G,n,x}.
Definition: eccrypto.h:225
ECMQV
Elliptic Curve Menezes-Qu-Vanstone.
Definition: eccrypto.h:273
Integer
Multiple precision integer with arithmetic operations.
Definition: integer.h:49
ECIES
Elliptic Curve Integrated Encryption Scheme.
Definition: eccrypto.h:618
SHA1
SHA-1 message digest.
Definition: sha.h:26
DL_Algorithm_ECNR
Elliptic Curve NR (ECNR) signature algorithm.
Definition: eccrypto.h:361
DL_PrivateKey_EC::DEREncodePrivateKey
void DEREncodePrivateKey(BufferedTransformation &bt) const
encode privateKey part of privateKeyInfo, without the OCTET STRING header
Definition: eccrypto.cpp:747
DL_Keys_ECGDSA
Elliptic Curve German DSA keys for ISO/IEC 15946.
Definition: eccrypto.h:548
DL_PrivateKey_ECGDSA::Initialize
void Initialize(const DL_GroupParameters_EC< EC > &params, const Integer &x)
Initialize an EC Private Key using {GP,x}.
Definition: eccrypto.h:425
gfpcrypt.h
Classes and functions for schemes based on Discrete Logs (DL) over GF(p)
DL_GroupParameters_EC::GetEncodedElementSize
virtual unsigned int GetEncodedElementSize(bool reversible) const
Retrieves the encoded element&#39;s size.
Definition: eccrypto.h:113
DL_GroupParameters_EC::DecodeElement
Element DecodeElement(const byte *encoded, bool checkForGroupMembership) const
Decodes the element.
Definition: eccrypto.h:120
DL_Algorithm_ECDSA
Elliptic Curve DSA (ECDSA) signature algorithm.
Definition: eccrypto.h:340
DL_BadElement
Exception thrown when an invalid group element is encountered.
Definition: pubkey.h:743
DL_PrivateKey_ECGDSA::AssignFrom
virtual void AssignFrom(const NameValuePairs &source)
Assign values to this object.
Definition: eccrypto.h:480
DL_PrivateKey_ECGDSA::BERDecodePrivateKey
void BERDecodePrivateKey(BufferedTransformation &bt, bool parametersPresent, size_t size)
decode privateKey part of privateKeyInfo, without the OCTET STRING header
Definition: eccrypto.cpp:779
CRYPTOPP_ASSERT
#define CRYPTOPP_ASSERT(exp)
Debugging and diagnostic assertion.
Definition: trap.h:69
DH_Domain
Diffie-Hellman domain.
Definition: dh.h:25
ECDH
Elliptic Curve Diffie-Hellman.
Definition: eccrypto.h:263
DL_GroupParameters_EC::DL_GroupParameters_EC
DL_GroupParameters_EC(const OID &oid)
Construct an EC GroupParameters.
Definition: eccrypto.h:54
DL_Algorithm_ECDSA_RFC6979
Elliptic Curve DSA (ECDSA) signature algorithm based on RFC 6979.
Definition: eccrypto.h:352
asn.h
Classes and functions for working with ANS.1 objects.
DL_FixedBasePrecomputation
DL_FixedBasePrecomputation interface.
Definition: eprecomp.h:60
sha.h
Classes for SHA-1 and SHA-2 family of message digests.
DL_GroupParameters_EC
Elliptic Curve Parameters.
Definition: eccrypto.h:37
DL_PrivateKey_EC::Initialize
void Initialize(RandomNumberGenerator &rng, const DL_GroupParameters_EC< EC > &params)
Create an EC private key.
Definition: eccrypto.h:234
DL_PublicKeyImpl< DL_GroupParameters_EC< EC > >::AccessAbstractGroupParameters
DL_GroupParameters< Element > & AccessAbstractGroupParameters()
Definition: pubkey.h:1345
DL_PublicKeyImpl< DL_GroupParameters_EC< EC > >::AccessPublicPrecomputation
DL_FixedBasePrecomputation< Element > & AccessPublicPrecomputation()
Definition: pubkey.h:1349
DL_Algorithm_DSA_RFC6979
DSA signature algorithm based on RFC 6979.
Definition: gfpcrypt.h:231
DL_PublicKey_EC::Initialize
void Initialize(const EC &ec, const Element &G, const Integer &n, const Element &Q)
Initialize an EC Public Key using {EC,G,n,Q}.
Definition: eccrypto.h:194
DL_Algorithm_GDSA
GDSA algorithm.
Definition: gfpcrypt.h:194
DL_GroupParameters_EC::DL_GroupParameters_EC
DL_GroupParameters_EC(BufferedTransformation &bt)
Construct an EC GroupParameters.
Definition: eccrypto.h:67
DL_Algorithm_NR
NR algorithm.
Definition: gfpcrypt.h:430
DL_PublicKeyImpl
Discrete Log (DL) public key base implementation.
Definition: pubkey.h:1298
integer.h
Multiple precision integer with arithmetic operations.
Integer::Zero
static const Integer & Zero()
Integer representing 0.
Definition: integer.cpp:4856
ECDSA_RFC6979
Elliptic Curve DSA (ECDSA) deterministic signature scheme.
Definition: eccrypto.h:384
NameValuePairs::GetThisPointer
bool GetThisPointer(T *&ptr) const
Get a pointer to this object.
Definition: cryptlib.h:337
DL_GroupParameters_EC::Initialize
void Initialize(const EllipticCurve &ec, const Point &G, const Integer &n, const Integer &k=Integer::Zero())
Initialize an EC GroupParameters using {EC,G,n,k}.
Definition: eccrypto.h:76
CryptoPP
Crypto++ library namespace.
DL_GroupParameters_EC::GetBasePrecomputation
const DL_FixedBasePrecomputation< Element > & GetBasePrecomputation() const
Retrieves the group precomputation.
Definition: eccrypto.h:99
DL_GroupParametersImpl
Base implementation of Discrete Log (DL) group parameters.
Definition: pubkey.h:983
DL_PrivateKeyImpl< DL_GroupParameters_EC< EC > >::GenerateRandom
void GenerateRandom(RandomNumberGenerator &rng, const NameValuePairs &params)
Definition: pubkey.h:1239
mqv.h
Classes for Menezes–Qu–Vanstone (MQV) key agreement.
DL_Algorithm_GDSA_ISO15946
German Digital Signature Algorithm.
Definition: gfpcrypt.h:389
OID
Object Identifier.
Definition: asn.h:166
Name::PublicElement
const char * PublicElement()
Integer.
Definition: argnames.h:36
DL_PublicKey_EC::BERDecodePublicKey
void BERDecodePublicKey(BufferedTransformation &bt, bool parametersPresent, size_t size)
decode subjectPublicKey part of subjectPublicKeyInfo, without the BIT STRING header ...
Definition: eccrypto.cpp:689
DL_PrivateKeyImpl< DL_GroupParameters_EC< EC > >::GetPrivateExponent
const Integer & GetPrivateExponent() const
Definition: pubkey.h:1263
DL_PrivateKey_EC::Initialize
void Initialize(const DL_GroupParameters_EC< EC > &params, const Integer &x)
Initialize an EC Private Key using {GP,x}.
Definition: eccrypto.h:216
DL_PrivateKey_EC::BERDecodePrivateKey
void BERDecodePrivateKey(BufferedTransformation &bt, bool parametersPresent, size_t size)
decode privateKey part of privateKeyInfo, without the OCTET STRING header
Definition: eccrypto.cpp:708
ECNR
Elliptic Curve NR (ECNR) signature scheme.
Definition: eccrypto.h:398
DL_PublicKey_ECGDSA::Initialize
void Initialize(const DL_GroupParameters_EC< EC > &params, const Element &Q)
Initialize an EC Public Key using {GP,Q}.
Definition: eccrypto.h:509
DL_PrivateKeyImpl< DL_GroupParameters_EC< EC > >::GetAbstractGroupParameters
const DL_GroupParameters< Element > & GetAbstractGroupParameters() const
Definition: pubkey.h:1259
NameValuePairs
Interface for retrieving values given their names.
Definition: cryptlib.h:293
DL_GroupParameters::GetSubgroupOrder
virtual const Integer & GetSubgroupOrder() const =0
Retrieves the subgroup order.