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-rw-r--r--CryptoPP/gfpcrypt.h48
1 files changed, 20 insertions, 28 deletions
diff --git a/CryptoPP/gfpcrypt.h b/CryptoPP/gfpcrypt.h
index 5e9c635d6..7af993fb3 100644
--- a/CryptoPP/gfpcrypt.h
+++ b/CryptoPP/gfpcrypt.h
@@ -369,51 +369,43 @@ public:
/*! 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};
};
-struct DSA;
+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>, DSA> PrivateKey;
+ typedef DL_PrivateKey_WithSignaturePairwiseConsistencyTest<DL_PrivateKey_GFP<DL_GroupParameters_DSA>, DSA2<SHA> > PrivateKey;
};
-//! <a href="http://www.weidai.com/scan-mirror/sig.html#DSA">DSA</a>
-struct CRYPTOPP_DLL DSA : public DL_SS<
+//! <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,
- SHA,
- DSA>
+ H,
+ DSA2<H> >
{
- static const char * CRYPTOPP_API StaticAlgorithmName() {return "DSA";}
-
- //! Generate DSA primes according to NIST standard
- /*! Both seedLength and primeLength are in bits, but seedLength should
- be a multiple of 8.
- If useInputCounterValue == true, the counter parameter is taken as input, otherwise it's used for output
- */
- static bool CRYPTOPP_API GeneratePrimes(const byte *seed, unsigned int seedLength, int &counter,
- Integer &p, unsigned int primeLength, Integer &q, bool useInputCounterValue = false);
-
- static bool CRYPTOPP_API IsValidPrimeLength(unsigned int pbits)
- {return pbits >= MIN_PRIME_LENGTH && pbits <= MAX_PRIME_LENGTH && pbits % PRIME_LENGTH_MULTIPLE == 0;}
-
- //! FIPS 186-2 Change Notice 1 changed the minimum modulus length to 1024
- enum {
-#if (DSA_1024_BIT_MODULUS_ONLY)
- MIN_PRIME_LENGTH = 1024,
-#else
- MIN_PRIME_LENGTH = 512,
-#endif
- MAX_PRIME_LENGTH = 1024, PRIME_LENGTH_MULTIPLE = 64};
+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>, 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>