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Diffstat (limited to 'CryptoPP/gfpcrypt.h')
| -rw-r--r-- | CryptoPP/gfpcrypt.h | 528 |
1 files changed, 0 insertions, 528 deletions
diff --git a/CryptoPP/gfpcrypt.h b/CryptoPP/gfpcrypt.h deleted file mode 100644 index 7af993fb3..000000000 --- a/CryptoPP/gfpcrypt.h +++ /dev/null @@ -1,528 +0,0 @@ -#ifndef CRYPTOPP_GFPCRYPT_H -#define CRYPTOPP_GFPCRYPT_H - -/** \file - Implementation of schemes based on DL over GF(p) -*/ - -#include "pubkey.h" -#include "modexppc.h" -#include "sha.h" -#include "algparam.h" -#include "asn.h" -#include "smartptr.h" -#include "hmac.h" - -#include <limits.h> - -NAMESPACE_BEGIN(CryptoPP) - -CRYPTOPP_DLL_TEMPLATE_CLASS DL_GroupParameters<Integer>; - -//! _ -class CRYPTOPP_DLL CRYPTOPP_NO_VTABLE DL_GroupParameters_IntegerBased : public ASN1CryptoMaterial<DL_GroupParameters<Integer> > -{ - typedef DL_GroupParameters_IntegerBased ThisClass; - -public: - void Initialize(const DL_GroupParameters_IntegerBased ¶ms) - {Initialize(params.GetModulus(), params.GetSubgroupOrder(), params.GetSubgroupGenerator());} - void Initialize(RandomNumberGenerator &rng, unsigned int pbits) - {GenerateRandom(rng, MakeParameters("ModulusSize", (int)pbits));} - void Initialize(const Integer &p, const Integer &g) - {SetModulusAndSubgroupGenerator(p, g); SetSubgroupOrder(ComputeGroupOrder(p)/2);} - void Initialize(const Integer &p, const Integer &q, const Integer &g) - {SetModulusAndSubgroupGenerator(p, g); SetSubgroupOrder(q);} - - // ASN1Object interface - void BERDecode(BufferedTransformation &bt); - void DEREncode(BufferedTransformation &bt) const; - - // GeneratibleCryptoMaterial interface - /*! parameters: (ModulusSize, SubgroupOrderSize (optional)) */ - void GenerateRandom(RandomNumberGenerator &rng, const NameValuePairs &alg); - bool GetVoidValue(const char *name, const std::type_info &valueType, void *pValue) const; - void AssignFrom(const NameValuePairs &source); - - // DL_GroupParameters - const Integer & GetSubgroupOrder() const {return m_q;} - Integer GetGroupOrder() const {return GetFieldType() == 1 ? GetModulus()-Integer::One() : GetModulus()+Integer::One();} - bool ValidateGroup(RandomNumberGenerator &rng, unsigned int level) const; - bool ValidateElement(unsigned int level, const Integer &element, const DL_FixedBasePrecomputation<Integer> *precomp) const; - bool FastSubgroupCheckAvailable() const {return GetCofactor() == 2;} - void EncodeElement(bool reversible, const Element &element, byte *encoded) const - {element.Encode(encoded, GetModulus().ByteCount());} - unsigned int GetEncodedElementSize(bool reversible) const {return GetModulus().ByteCount();} - Integer DecodeElement(const byte *encoded, bool checkForGroupMembership) const; - Integer ConvertElementToInteger(const Element &element) const - {return element;} - Integer GetMaxExponent() const; - static std::string CRYPTOPP_API StaticAlgorithmNamePrefix() {return "";} - - OID GetAlgorithmID() const; - - virtual const Integer & GetModulus() const =0; - virtual void SetModulusAndSubgroupGenerator(const Integer &p, const Integer &g) =0; - - void SetSubgroupOrder(const Integer &q) - {m_q = q; ParametersChanged();} - -protected: - Integer ComputeGroupOrder(const Integer &modulus) const - {return modulus-(GetFieldType() == 1 ? 1 : -1);} - - // GF(p) = 1, GF(p^2) = 2 - virtual int GetFieldType() const =0; - virtual unsigned int GetDefaultSubgroupOrderSize(unsigned int modulusSize) const; - -private: - Integer m_q; -}; - -//! _ -template <class GROUP_PRECOMP, class BASE_PRECOMP = DL_FixedBasePrecomputationImpl<CPP_TYPENAME GROUP_PRECOMP::Element> > -class CRYPTOPP_NO_VTABLE DL_GroupParameters_IntegerBasedImpl : public DL_GroupParametersImpl<GROUP_PRECOMP, BASE_PRECOMP, DL_GroupParameters_IntegerBased> -{ - typedef DL_GroupParameters_IntegerBasedImpl<GROUP_PRECOMP, BASE_PRECOMP> ThisClass; - -public: - typedef typename GROUP_PRECOMP::Element Element; - - // GeneratibleCryptoMaterial interface - bool GetVoidValue(const char *name, const std::type_info &valueType, void *pValue) const - {return GetValueHelper<DL_GroupParameters_IntegerBased>(this, name, valueType, pValue).Assignable();} - - void AssignFrom(const NameValuePairs &source) - {AssignFromHelper<DL_GroupParameters_IntegerBased>(this, source);} - - // DL_GroupParameters - const DL_FixedBasePrecomputation<Element> & GetBasePrecomputation() const {return this->m_gpc;} - DL_FixedBasePrecomputation<Element> & AccessBasePrecomputation() {return this->m_gpc;} - - // IntegerGroupParameters - const Integer & GetModulus() const {return this->m_groupPrecomputation.GetModulus();} - const Integer & GetGenerator() const {return this->m_gpc.GetBase(this->GetGroupPrecomputation());} - - void SetModulusAndSubgroupGenerator(const Integer &p, const Integer &g) // these have to be set together - {this->m_groupPrecomputation.SetModulus(p); this->m_gpc.SetBase(this->GetGroupPrecomputation(), g); this->ParametersChanged();} - - // non-inherited - bool operator==(const DL_GroupParameters_IntegerBasedImpl<GROUP_PRECOMP, BASE_PRECOMP> &rhs) const - {return GetModulus() == rhs.GetModulus() && GetGenerator() == rhs.GetGenerator() && this->GetSubgroupOrder() == rhs.GetSubgroupOrder();} - bool operator!=(const DL_GroupParameters_IntegerBasedImpl<GROUP_PRECOMP, BASE_PRECOMP> &rhs) const - {return !operator==(rhs);} -}; - -CRYPTOPP_DLL_TEMPLATE_CLASS DL_GroupParameters_IntegerBasedImpl<ModExpPrecomputation>; - -//! GF(p) group parameters -class CRYPTOPP_DLL DL_GroupParameters_GFP : public DL_GroupParameters_IntegerBasedImpl<ModExpPrecomputation> -{ -public: - // DL_GroupParameters - bool IsIdentity(const Integer &element) const {return element == Integer::One();} - void SimultaneousExponentiate(Element *results, const Element &base, const Integer *exponents, unsigned int exponentsCount) const; - - // NameValuePairs interface - bool GetVoidValue(const char *name, const std::type_info &valueType, void *pValue) const - { - return GetValueHelper<DL_GroupParameters_IntegerBased>(this, name, valueType, pValue).Assignable(); - } - - // used by MQV - Element MultiplyElements(const Element &a, const Element &b) const; - Element CascadeExponentiate(const Element &element1, const Integer &exponent1, const Element &element2, const Integer &exponent2) const; - -protected: - int GetFieldType() const {return 1;} -}; - -//! GF(p) group parameters that default to same primes -class CRYPTOPP_DLL DL_GroupParameters_GFP_DefaultSafePrime : public DL_GroupParameters_GFP -{ -public: - typedef NoCofactorMultiplication DefaultCofactorOption; - -protected: - unsigned int GetDefaultSubgroupOrderSize(unsigned int modulusSize) const {return modulusSize-1;} -}; - -//! GDSA algorithm -template <class T> -class DL_Algorithm_GDSA : public DL_ElgamalLikeSignatureAlgorithm<T> -{ -public: - static const char * CRYPTOPP_API StaticAlgorithmName() {return "DSA-1363";} - - void Sign(const DL_GroupParameters<T> ¶ms, const Integer &x, const Integer &k, const Integer &e, Integer &r, Integer &s) const - { - const Integer &q = params.GetSubgroupOrder(); - r %= q; - Integer kInv = k.InverseMod(q); - s = (kInv * (x*r + e)) % q; - assert(!!r && !!s); - } - - bool Verify(const DL_GroupParameters<T> ¶ms, const DL_PublicKey<T> &publicKey, const Integer &e, const Integer &r, const Integer &s) const - { - const Integer &q = params.GetSubgroupOrder(); - if (r>=q || r<1 || s>=q || s<1) - return false; - - Integer w = s.InverseMod(q); - Integer u1 = (e * w) % q; - Integer u2 = (r * w) % q; - // verify r == (g^u1 * y^u2 mod p) mod q - return r == params.ConvertElementToInteger(publicKey.CascadeExponentiateBaseAndPublicElement(u1, u2)) % q; - } -}; - -CRYPTOPP_DLL_TEMPLATE_CLASS DL_Algorithm_GDSA<Integer>; - -//! NR algorithm -template <class T> -class DL_Algorithm_NR : public DL_ElgamalLikeSignatureAlgorithm<T> -{ -public: - static const char * CRYPTOPP_API StaticAlgorithmName() {return "NR";} - - void Sign(const DL_GroupParameters<T> ¶ms, const Integer &x, const Integer &k, const Integer &e, Integer &r, Integer &s) const - { - const Integer &q = params.GetSubgroupOrder(); - r = (r + e) % q; - s = (k - x*r) % q; - assert(!!r); - } - - bool Verify(const DL_GroupParameters<T> ¶ms, const DL_PublicKey<T> &publicKey, const Integer &e, const Integer &r, const Integer &s) const - { - const Integer &q = params.GetSubgroupOrder(); - if (r>=q || r<1 || s>=q) - return false; - - // check r == (m_g^s * m_y^r + m) mod m_q - return r == (params.ConvertElementToInteger(publicKey.CascadeExponentiateBaseAndPublicElement(s, r)) + e) % q; - } -}; - -/*! DSA public key format is defined in 7.3.3 of RFC 2459. The - private key format is defined in 12.9 of PKCS #11 v2.10. */ -template <class GP> -class DL_PublicKey_GFP : public DL_PublicKeyImpl<GP> -{ -public: - void Initialize(const DL_GroupParameters_IntegerBased ¶ms, const Integer &y) - {this->AccessGroupParameters().Initialize(params); this->SetPublicElement(y);} - void Initialize(const Integer &p, const Integer &g, const Integer &y) - {this->AccessGroupParameters().Initialize(p, g); this->SetPublicElement(y);} - void Initialize(const Integer &p, const Integer &q, const Integer &g, const Integer &y) - {this->AccessGroupParameters().Initialize(p, q, g); this->SetPublicElement(y);} - - // X509PublicKey - void BERDecodePublicKey(BufferedTransformation &bt, bool, size_t) - {this->SetPublicElement(Integer(bt));} - void DEREncodePublicKey(BufferedTransformation &bt) const - {this->GetPublicElement().DEREncode(bt);} -}; - -//! DL private key (in GF(p) groups) -template <class GP> -class DL_PrivateKey_GFP : public DL_PrivateKeyImpl<GP> -{ -public: - void Initialize(RandomNumberGenerator &rng, unsigned int modulusBits) - {this->GenerateRandomWithKeySize(rng, modulusBits);} - void Initialize(RandomNumberGenerator &rng, const Integer &p, const Integer &g) - {this->GenerateRandom(rng, MakeParameters("Modulus", p)("SubgroupGenerator", g));} - void Initialize(RandomNumberGenerator &rng, const Integer &p, const Integer &q, const Integer &g) - {this->GenerateRandom(rng, MakeParameters("Modulus", p)("SubgroupOrder", q)("SubgroupGenerator", g));} - void Initialize(const DL_GroupParameters_IntegerBased ¶ms, const Integer &x) - {this->AccessGroupParameters().Initialize(params); this->SetPrivateExponent(x);} - void Initialize(const Integer &p, const Integer &g, const Integer &x) - {this->AccessGroupParameters().Initialize(p, g); this->SetPrivateExponent(x);} - void Initialize(const Integer &p, const Integer &q, const Integer &g, const Integer &x) - {this->AccessGroupParameters().Initialize(p, q, g); this->SetPrivateExponent(x);} -}; - -//! DL signing/verification keys (in GF(p) groups) -struct DL_SignatureKeys_GFP -{ - typedef DL_GroupParameters_GFP GroupParameters; - typedef DL_PublicKey_GFP<GroupParameters> PublicKey; - typedef DL_PrivateKey_GFP<GroupParameters> PrivateKey; -}; - -//! DL encryption/decryption keys (in GF(p) groups) -struct DL_CryptoKeys_GFP -{ - typedef DL_GroupParameters_GFP_DefaultSafePrime GroupParameters; - typedef DL_PublicKey_GFP<GroupParameters> PublicKey; - typedef DL_PrivateKey_GFP<GroupParameters> PrivateKey; -}; - -//! provided for backwards compatibility, this class uses the old non-standard Crypto++ key format -template <class BASE> -class DL_PublicKey_GFP_OldFormat : public BASE -{ -public: - void BERDecode(BufferedTransformation &bt) - { - BERSequenceDecoder seq(bt); - Integer v1(seq); - Integer v2(seq); - Integer v3(seq); - - if (seq.EndReached()) - { - this->AccessGroupParameters().Initialize(v1, v1/2, v2); - this->SetPublicElement(v3); - } - else - { - Integer v4(seq); - this->AccessGroupParameters().Initialize(v1, v2, v3); - this->SetPublicElement(v4); - } - - seq.MessageEnd(); - } - - void DEREncode(BufferedTransformation &bt) const - { - DERSequenceEncoder seq(bt); - this->GetGroupParameters().GetModulus().DEREncode(seq); - if (this->GetGroupParameters().GetCofactor() != 2) - this->GetGroupParameters().GetSubgroupOrder().DEREncode(seq); - this->GetGroupParameters().GetGenerator().DEREncode(seq); - this->GetPublicElement().DEREncode(seq); - seq.MessageEnd(); - } -}; - -//! provided for backwards compatibility, this class uses the old non-standard Crypto++ key format -template <class BASE> -class DL_PrivateKey_GFP_OldFormat : public BASE -{ -public: - void BERDecode(BufferedTransformation &bt) - { - BERSequenceDecoder seq(bt); - Integer v1(seq); - Integer v2(seq); - Integer v3(seq); - Integer v4(seq); - - if (seq.EndReached()) - { - this->AccessGroupParameters().Initialize(v1, v1/2, v2); - this->SetPrivateExponent(v4 % (v1/2)); // some old keys may have x >= q - } - else - { - Integer v5(seq); - this->AccessGroupParameters().Initialize(v1, v2, v3); - this->SetPrivateExponent(v5); - } - - seq.MessageEnd(); - } - - void DEREncode(BufferedTransformation &bt) const - { - DERSequenceEncoder seq(bt); - this->GetGroupParameters().GetModulus().DEREncode(seq); - if (this->GetGroupParameters().GetCofactor() != 2) - this->GetGroupParameters().GetSubgroupOrder().DEREncode(seq); - this->GetGroupParameters().GetGenerator().DEREncode(seq); - this->GetGroupParameters().ExponentiateBase(this->GetPrivateExponent()).DEREncode(seq); - this->GetPrivateExponent().DEREncode(seq); - seq.MessageEnd(); - } -}; - -//! <a href="http://www.weidai.com/scan-mirror/sig.html#DSA-1363">DSA-1363</a> -template <class H> -struct GDSA : public DL_SS< - DL_SignatureKeys_GFP, - DL_Algorithm_GDSA<Integer>, - DL_SignatureMessageEncodingMethod_DSA, - H> -{ -}; - -//! <a href="http://www.weidai.com/scan-mirror/sig.html#NR">NR</a> -template <class H> -struct NR : public DL_SS< - DL_SignatureKeys_GFP, - DL_Algorithm_NR<Integer>, - DL_SignatureMessageEncodingMethod_NR, - H> -{ -}; - -//! DSA group parameters, these are GF(p) group parameters that are allowed by the DSA standard -class CRYPTOPP_DLL DL_GroupParameters_DSA : public DL_GroupParameters_GFP -{ -public: - /*! also checks that the lengths of p and q are allowed by the DSA standard */ - bool ValidateGroup(RandomNumberGenerator &rng, unsigned int level) const; - /*! parameters: (ModulusSize), or (Modulus, SubgroupOrder, SubgroupGenerator) */ - /*! ModulusSize must be between DSA::MIN_PRIME_LENGTH and DSA::MAX_PRIME_LENGTH, and divisible by DSA::PRIME_LENGTH_MULTIPLE */ - void GenerateRandom(RandomNumberGenerator &rng, const NameValuePairs &alg); - - static bool CRYPTOPP_API IsValidPrimeLength(unsigned int pbits) - {return pbits >= MIN_PRIME_LENGTH && pbits <= MAX_PRIME_LENGTH && pbits % PRIME_LENGTH_MULTIPLE == 0;} - - enum {MIN_PRIME_LENGTH = 1024, MAX_PRIME_LENGTH = 3072, PRIME_LENGTH_MULTIPLE = 1024}; -}; - -template <class H> -class DSA2; - -//! DSA keys -struct DL_Keys_DSA -{ - typedef DL_PublicKey_GFP<DL_GroupParameters_DSA> PublicKey; - typedef DL_PrivateKey_WithSignaturePairwiseConsistencyTest<DL_PrivateKey_GFP<DL_GroupParameters_DSA>, DSA2<SHA> > PrivateKey; -}; - -//! <a href="http://en.wikipedia.org/wiki/Digital_Signature_Algorithm">DSA</a>, as specified in FIPS 186-3 -// class named DSA2 instead of DSA for backwards compatibility (DSA was a non-template class) -template <class H> -class DSA2 : public DL_SS< - DL_Keys_DSA, - DL_Algorithm_GDSA<Integer>, - DL_SignatureMessageEncodingMethod_DSA, - H, - DSA2<H> > -{ -public: - static std::string CRYPTOPP_API StaticAlgorithmName() {return "DSA/" + (std::string)H::StaticAlgorithmName();} -}; - -//! DSA with SHA-1, typedef'd for backwards compatibility -typedef DSA2<SHA> DSA; - -CRYPTOPP_DLL_TEMPLATE_CLASS DL_PublicKey_GFP<DL_GroupParameters_DSA>; -CRYPTOPP_DLL_TEMPLATE_CLASS DL_PrivateKey_GFP<DL_GroupParameters_DSA>; -CRYPTOPP_DLL_TEMPLATE_CLASS DL_PrivateKey_WithSignaturePairwiseConsistencyTest<DL_PrivateKey_GFP<DL_GroupParameters_DSA>, DSA2<SHA> >; - -//! the XOR encryption method, for use with DL-based cryptosystems -template <class MAC, bool DHAES_MODE> -class DL_EncryptionAlgorithm_Xor : public DL_SymmetricEncryptionAlgorithm -{ -public: - bool ParameterSupported(const char *name) const {return strcmp(name, Name::EncodingParameters()) == 0;} - size_t GetSymmetricKeyLength(size_t plaintextLength) const - {return plaintextLength + MAC::DEFAULT_KEYLENGTH;} - size_t GetSymmetricCiphertextLength(size_t plaintextLength) const - {return plaintextLength + MAC::DIGESTSIZE;} - size_t GetMaxSymmetricPlaintextLength(size_t ciphertextLength) const - {return (unsigned int)SaturatingSubtract(ciphertextLength, (unsigned int)MAC::DIGESTSIZE);} - void SymmetricEncrypt(RandomNumberGenerator &rng, const byte *key, const byte *plaintext, size_t plaintextLength, byte *ciphertext, const NameValuePairs ¶meters) const - { - const byte *cipherKey, *macKey; - if (DHAES_MODE) - { - macKey = key; - cipherKey = key + MAC::DEFAULT_KEYLENGTH; - } - else - { - cipherKey = key; - macKey = key + plaintextLength; - } - - ConstByteArrayParameter encodingParameters; - parameters.GetValue(Name::EncodingParameters(), encodingParameters); - - xorbuf(ciphertext, plaintext, cipherKey, plaintextLength); - MAC mac(macKey); - mac.Update(ciphertext, plaintextLength); - mac.Update(encodingParameters.begin(), encodingParameters.size()); - if (DHAES_MODE) - { - byte L[8] = {0,0,0,0}; - PutWord(false, BIG_ENDIAN_ORDER, L+4, word32(encodingParameters.size())); - mac.Update(L, 8); - } - mac.Final(ciphertext + plaintextLength); - } - DecodingResult SymmetricDecrypt(const byte *key, const byte *ciphertext, size_t ciphertextLength, byte *plaintext, const NameValuePairs ¶meters) const - { - size_t plaintextLength = GetMaxSymmetricPlaintextLength(ciphertextLength); - const byte *cipherKey, *macKey; - if (DHAES_MODE) - { - macKey = key; - cipherKey = key + MAC::DEFAULT_KEYLENGTH; - } - else - { - cipherKey = key; - macKey = key + plaintextLength; - } - - ConstByteArrayParameter encodingParameters; - parameters.GetValue(Name::EncodingParameters(), encodingParameters); - - MAC mac(macKey); - mac.Update(ciphertext, plaintextLength); - mac.Update(encodingParameters.begin(), encodingParameters.size()); - if (DHAES_MODE) - { - byte L[8] = {0,0,0,0}; - PutWord(false, BIG_ENDIAN_ORDER, L+4, word32(encodingParameters.size())); - mac.Update(L, 8); - } - if (!mac.Verify(ciphertext + plaintextLength)) - return DecodingResult(); - - xorbuf(plaintext, ciphertext, cipherKey, plaintextLength); - return DecodingResult(plaintextLength); - } -}; - -//! _ -template <class T, bool DHAES_MODE, class KDF> -class DL_KeyDerivationAlgorithm_P1363 : public DL_KeyDerivationAlgorithm<T> -{ -public: - bool ParameterSupported(const char *name) const {return strcmp(name, Name::KeyDerivationParameters()) == 0;} - void Derive(const DL_GroupParameters<T> ¶ms, byte *derivedKey, size_t derivedLength, const T &agreedElement, const T &ephemeralPublicKey, const NameValuePairs ¶meters) const - { - SecByteBlock agreedSecret; - if (DHAES_MODE) - { - agreedSecret.New(params.GetEncodedElementSize(true) + params.GetEncodedElementSize(false)); - params.EncodeElement(true, ephemeralPublicKey, agreedSecret); - params.EncodeElement(false, agreedElement, agreedSecret + params.GetEncodedElementSize(true)); - } - else - { - agreedSecret.New(params.GetEncodedElementSize(false)); - params.EncodeElement(false, agreedElement, agreedSecret); - } - - ConstByteArrayParameter derivationParameters; - parameters.GetValue(Name::KeyDerivationParameters(), derivationParameters); - KDF::DeriveKey(derivedKey, derivedLength, agreedSecret, agreedSecret.size(), derivationParameters.begin(), derivationParameters.size()); - } -}; - -//! Discrete Log Integrated Encryption Scheme, AKA <a href="http://www.weidai.com/scan-mirror/ca.html#DLIES">DLIES</a> -template <class COFACTOR_OPTION = NoCofactorMultiplication, bool DHAES_MODE = true> -struct DLIES - : public DL_ES< - DL_CryptoKeys_GFP, - DL_KeyAgreementAlgorithm_DH<Integer, COFACTOR_OPTION>, - DL_KeyDerivationAlgorithm_P1363<Integer, DHAES_MODE, P1363_KDF2<SHA1> >, - DL_EncryptionAlgorithm_Xor<HMAC<SHA1>, DHAES_MODE>, - DLIES<> > -{ - static std::string CRYPTOPP_API StaticAlgorithmName() {return "DLIES";} // TODO: fix this after name is standardized -}; - -NAMESPACE_END - -#endif |