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Diffstat (limited to 'CryptoPP/esign.cpp')
| -rw-r--r-- | CryptoPP/esign.cpp | 210 |
1 files changed, 0 insertions, 210 deletions
diff --git a/CryptoPP/esign.cpp b/CryptoPP/esign.cpp deleted file mode 100644 index 8b42c1fa4..000000000 --- a/CryptoPP/esign.cpp +++ /dev/null @@ -1,210 +0,0 @@ -// esign.cpp - written and placed in the public domain by Wei Dai - -#include "pch.h" -#include "esign.h" -#include "asn.h" -#include "modarith.h" -#include "nbtheory.h" -#include "sha.h" -#include "algparam.h" - -NAMESPACE_BEGIN(CryptoPP) - -void ESIGN_TestInstantiations() -{ - ESIGN<SHA>::Verifier x1(1, 1); - ESIGN<SHA>::Signer x2(NullRNG(), 1); - ESIGN<SHA>::Verifier x3(x2); - ESIGN<SHA>::Verifier x4(x2.GetKey()); - ESIGN<SHA>::Verifier x5(x3); - ESIGN<SHA>::Signer x6 = x2; - - x6 = x2; - x3 = ESIGN<SHA>::Verifier(x2); - x4 = x2.GetKey(); -} - -void ESIGNFunction::BERDecode(BufferedTransformation &bt) -{ - BERSequenceDecoder seq(bt); - m_n.BERDecode(seq); - m_e.BERDecode(seq); - seq.MessageEnd(); -} - -void ESIGNFunction::DEREncode(BufferedTransformation &bt) const -{ - DERSequenceEncoder seq(bt); - m_n.DEREncode(seq); - m_e.DEREncode(seq); - seq.MessageEnd(); -} - -Integer ESIGNFunction::ApplyFunction(const Integer &x) const -{ - DoQuickSanityCheck(); - return STDMIN(a_exp_b_mod_c(x, m_e, m_n) >> (2*GetK()+2), MaxImage()); -} - -bool ESIGNFunction::Validate(RandomNumberGenerator &rng, unsigned int level) const -{ - bool pass = true; - pass = pass && m_n > Integer::One() && m_n.IsOdd(); - pass = pass && m_e >= 8 && m_e < m_n; - return pass; -} - -bool ESIGNFunction::GetVoidValue(const char *name, const std::type_info &valueType, void *pValue) const -{ - return GetValueHelper(this, name, valueType, pValue).Assignable() - CRYPTOPP_GET_FUNCTION_ENTRY(Modulus) - CRYPTOPP_GET_FUNCTION_ENTRY(PublicExponent) - ; -} - -void ESIGNFunction::AssignFrom(const NameValuePairs &source) -{ - AssignFromHelper(this, source) - CRYPTOPP_SET_FUNCTION_ENTRY(Modulus) - CRYPTOPP_SET_FUNCTION_ENTRY(PublicExponent) - ; -} - -// ***************************************************************************** - -void InvertibleESIGNFunction::GenerateRandom(RandomNumberGenerator &rng, const NameValuePairs ¶m) -{ - int modulusSize = 1023*2; - param.GetIntValue("ModulusSize", modulusSize) || param.GetIntValue("KeySize", modulusSize); - - if (modulusSize < 24) - throw InvalidArgument("InvertibleESIGNFunction: specified modulus size is too small"); - - if (modulusSize % 3 != 0) - throw InvalidArgument("InvertibleESIGNFunction: modulus size must be divisible by 3"); - - m_e = param.GetValueWithDefault("PublicExponent", Integer(32)); - - if (m_e < 8) - throw InvalidArgument("InvertibleESIGNFunction: public exponents less than 8 may not be secure"); - - // VC70 workaround: putting these after primeParam causes overlapped stack allocation - ConstByteArrayParameter seedParam; - SecByteBlock seed; - - const Integer minP = Integer(204) << (modulusSize/3-8); - const Integer maxP = Integer::Power2(modulusSize/3)-1; - AlgorithmParameters primeParam = MakeParameters("Min", minP)("Max", maxP)("RandomNumberType", Integer::PRIME); - - if (param.GetValue("Seed", seedParam)) - { - seed.resize(seedParam.size() + 4); - memcpy(seed + 4, seedParam.begin(), seedParam.size()); - - PutWord(false, BIG_ENDIAN_ORDER, seed, (word32)0); - m_p.GenerateRandom(rng, CombinedNameValuePairs(primeParam, MakeParameters("Seed", ConstByteArrayParameter(seed)))); - PutWord(false, BIG_ENDIAN_ORDER, seed, (word32)1); - m_q.GenerateRandom(rng, CombinedNameValuePairs(primeParam, MakeParameters("Seed", ConstByteArrayParameter(seed)))); - } - else - { - m_p.GenerateRandom(rng, primeParam); - m_q.GenerateRandom(rng, primeParam); - } - - m_n = m_p * m_p * m_q; - - assert(m_n.BitCount() == modulusSize); -} - -void InvertibleESIGNFunction::BERDecode(BufferedTransformation &bt) -{ - BERSequenceDecoder privateKey(bt); - m_n.BERDecode(privateKey); - m_e.BERDecode(privateKey); - m_p.BERDecode(privateKey); - m_q.BERDecode(privateKey); - privateKey.MessageEnd(); -} - -void InvertibleESIGNFunction::DEREncode(BufferedTransformation &bt) const -{ - DERSequenceEncoder privateKey(bt); - m_n.DEREncode(privateKey); - m_e.DEREncode(privateKey); - m_p.DEREncode(privateKey); - m_q.DEREncode(privateKey); - privateKey.MessageEnd(); -} - -Integer InvertibleESIGNFunction::CalculateRandomizedInverse(RandomNumberGenerator &rng, const Integer &x) const -{ - DoQuickSanityCheck(); - - Integer pq = m_p * m_q; - Integer p2 = m_p * m_p; - Integer r, z, re, a, w0, w1; - - do - { - r.Randomize(rng, Integer::Zero(), pq); - z = x << (2*GetK()+2); - re = a_exp_b_mod_c(r, m_e, m_n); - a = (z - re) % m_n; - Integer::Divide(w1, w0, a, pq); - if (w1.NotZero()) - { - ++w0; - w1 = pq - w1; - } - } - while ((w1 >> 2*GetK()+1).IsPositive()); - - ModularArithmetic modp(m_p); - Integer t = modp.Divide(w0 * r % m_p, m_e * re % m_p); - Integer s = r + t*pq; - assert(s < m_n); -/* - using namespace std; - cout << "f = " << x << endl; - cout << "r = " << r << endl; - cout << "z = " << z << endl; - cout << "a = " << a << endl; - cout << "w0 = " << w0 << endl; - cout << "w1 = " << w1 << endl; - cout << "t = " << t << endl; - cout << "s = " << s << endl; -*/ - return s; -} - -bool InvertibleESIGNFunction::Validate(RandomNumberGenerator &rng, unsigned int level) const -{ - bool pass = ESIGNFunction::Validate(rng, level); - pass = pass && m_p > Integer::One() && m_p.IsOdd() && m_p < m_n; - pass = pass && m_q > Integer::One() && m_q.IsOdd() && m_q < m_n; - pass = pass && m_p.BitCount() == m_q.BitCount(); - if (level >= 1) - pass = pass && m_p * m_p * m_q == m_n; - if (level >= 2) - pass = pass && VerifyPrime(rng, m_p, level-2) && VerifyPrime(rng, m_q, level-2); - return pass; -} - -bool InvertibleESIGNFunction::GetVoidValue(const char *name, const std::type_info &valueType, void *pValue) const -{ - return GetValueHelper<ESIGNFunction>(this, name, valueType, pValue).Assignable() - CRYPTOPP_GET_FUNCTION_ENTRY(Prime1) - CRYPTOPP_GET_FUNCTION_ENTRY(Prime2) - ; -} - -void InvertibleESIGNFunction::AssignFrom(const NameValuePairs &source) -{ - AssignFromHelper<ESIGNFunction>(this, source) - CRYPTOPP_SET_FUNCTION_ENTRY(Prime1) - CRYPTOPP_SET_FUNCTION_ENTRY(Prime2) - ; -} - -NAMESPACE_END |