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Diffstat (limited to 'plugins/CryptoPP/crypto/esign.h')
| -rw-r--r-- | plugins/CryptoPP/crypto/esign.h | 128 |
1 files changed, 128 insertions, 0 deletions
diff --git a/plugins/CryptoPP/crypto/esign.h b/plugins/CryptoPP/crypto/esign.h new file mode 100644 index 0000000000..058e414cc3 --- /dev/null +++ b/plugins/CryptoPP/crypto/esign.h @@ -0,0 +1,128 @@ +#ifndef CRYPTOPP_ESIGN_H
+#define CRYPTOPP_ESIGN_H
+
+/** \file
+ This file contains classes that implement the
+ ESIGN signature schemes as defined in IEEE P1363a.
+*/
+
+#include "pubkey.h"
+#include "integer.h"
+#include "asn.h"
+
+NAMESPACE_BEGIN(CryptoPP)
+
+//! _
+class ESIGNFunction : public TrapdoorFunction, public ASN1CryptoMaterial<PublicKey>
+{
+ typedef ESIGNFunction ThisClass;
+
+public:
+ void Initialize(const Integer &n, const Integer &e)
+ {m_n = n; m_e = e;}
+
+ // PublicKey
+ void BERDecode(BufferedTransformation &bt);
+ void DEREncode(BufferedTransformation &bt) const;
+
+ // CryptoMaterial
+ bool Validate(RandomNumberGenerator &rng, unsigned int level) const;
+ bool GetVoidValue(const char *name, const std::type_info &valueType, void *pValue) const;
+ void AssignFrom(const NameValuePairs &source);
+
+ // TrapdoorFunction
+ Integer ApplyFunction(const Integer &x) const;
+ Integer PreimageBound() const {return m_n;}
+ Integer ImageBound() const {return Integer::Power2(GetK());}
+
+ // non-derived
+ const Integer & GetModulus() const {return m_n;}
+ const Integer & GetPublicExponent() const {return m_e;}
+
+ void SetModulus(const Integer &n) {m_n = n;}
+ void SetPublicExponent(const Integer &e) {m_e = e;}
+
+protected:
+ unsigned int GetK() const {return m_n.BitCount()/3-1;}
+
+ Integer m_n, m_e;
+};
+
+//! _
+class InvertibleESIGNFunction : public ESIGNFunction, public RandomizedTrapdoorFunctionInverse, public PrivateKey
+{
+ typedef InvertibleESIGNFunction ThisClass;
+
+public:
+ void Initialize(const Integer &n, const Integer &e, const Integer &p, const Integer &q)
+ {m_n = n; m_e = e; m_p = p; m_q = q;}
+ // generate a random private key
+ void Initialize(RandomNumberGenerator &rng, unsigned int modulusBits)
+ {GenerateRandomWithKeySize(rng, modulusBits);}
+
+ void BERDecode(BufferedTransformation &bt);
+ void DEREncode(BufferedTransformation &bt) const;
+
+ Integer CalculateRandomizedInverse(RandomNumberGenerator &rng, const Integer &x) const;
+
+ // GeneratibleCryptoMaterial
+ bool Validate(RandomNumberGenerator &rng, unsigned int level) const;
+ bool GetVoidValue(const char *name, const std::type_info &valueType, void *pValue) const;
+ void AssignFrom(const NameValuePairs &source);
+ /*! parameters: (ModulusSize) */
+ void GenerateRandom(RandomNumberGenerator &rng, const NameValuePairs &alg);
+
+ const Integer& GetPrime1() const {return m_p;}
+ const Integer& GetPrime2() const {return m_q;}
+
+ void SetPrime1(const Integer &p) {m_p = p;}
+ void SetPrime2(const Integer &q) {m_q = q;}
+
+protected:
+ Integer m_p, m_q;
+};
+
+//! _
+template <class T>
+class EMSA5Pad : public PK_DeterministicSignatureMessageEncodingMethod
+{
+public:
+ static const char *StaticAlgorithmName() {return "EMSA5";}
+
+ void ComputeMessageRepresentative(RandomNumberGenerator &rng,
+ const byte *recoverableMessage, size_t recoverableMessageLength,
+ HashTransformation &hash, HashIdentifier hashIdentifier, bool messageEmpty,
+ byte *representative, size_t representativeBitLength) const
+ {
+ SecByteBlock digest(hash.DigestSize());
+ hash.Final(digest);
+ size_t representativeByteLength = BitsToBytes(representativeBitLength);
+ T mgf;
+ mgf.GenerateAndMask(hash, representative, representativeByteLength, digest, digest.size(), false);
+ if (representativeBitLength % 8 != 0)
+ representative[0] = (byte)Crop(representative[0], representativeBitLength % 8);
+ }
+};
+
+//! EMSA5, for use with ESIGN
+struct P1363_EMSA5 : public SignatureStandard
+{
+ typedef EMSA5Pad<P1363_MGF1> SignatureMessageEncodingMethod;
+};
+
+struct ESIGN_Keys
+{
+ static std::string StaticAlgorithmName() {return "ESIGN";}
+ typedef ESIGNFunction PublicKey;
+ typedef InvertibleESIGNFunction PrivateKey;
+};
+
+//! ESIGN, as defined in IEEE P1363a
+template <class H, class STANDARD = P1363_EMSA5>
+struct ESIGN : public TF_SS<STANDARD, H, ESIGN_Keys>
+{
+};
+
+NAMESPACE_END
+
+#endif
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