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authorAlexander Harkness <bearbin@gmail.com>2013-11-24 15:21:13 +0100
committerAlexander Harkness <bearbin@gmail.com>2013-11-24 15:21:13 +0100
commit3438e5d3ddf8444f0e31009ffbe8237ef3752c22 (patch)
tree7c2f76d5e9281c130e60fb932c4dda89a49863b6 /CryptoPP/esign.cpp
parentMoved source to src (diff)
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Diffstat (limited to 'CryptoPP/esign.cpp')
-rw-r--r--CryptoPP/esign.cpp210
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 &param)
-{
- 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