private void SignatureGost12Test(String signatureAlg, int expectedSignLen, AsymmetricCipherKeyPair p)
{
byte[] data = { 1, 2, 3, 4, 5, 6, 7, 8, 9, 0 };
ECPrivateKeyParameters sKey = (ECPrivateKeyParameters)p.Private;
ECPublicKeyParameters vKey = (ECPublicKeyParameters)p.Public;
ECGOST3410_2012Signer s = new ECGOST3410_2012Signer();
s.Init(true, sKey);
BigInteger[] sig = s.GenerateSignature(data);
s = new ECGOST3410_2012Signer();
s.Init(false, vKey);
if (!s.VerifySignature(data, sig[0], sig[1]))
{
Fail("Signature " + signatureAlg + " did not verify");
}
//
// Test with Digest signer.
//
Gost3410DigestSigner digestSigner = new Gost3410DigestSigner(
new ECGOST3410_2012Signer(),
DigestUtilities.GetDigest(((ECGOST3410Parameters)vKey.Parameters).DigestParamSet));
digestSigner.Init(true, sKey);
digestSigner.BlockUpdate(data, 0, data.Length);
byte[] sigBytes = digestSigner.GenerateSignature();
if (sigBytes.Length != expectedSignLen)
{
Fail(signatureAlg + " signature failed at expected length");
}
digestSigner = new Gost3410DigestSigner(
new ECGOST3410_2012Signer(),
DigestUtilities.GetDigest(((ECGOST3410Parameters)vKey.Parameters).DigestParamSet));
digestSigner.Init(false, vKey);
digestSigner.BlockUpdate(data, 0, data.Length);
if (!digestSigner.VerifySignature(sigBytes))
{
Fail("Signature " + signatureAlg + " did not verify");
}
}
public void EcGOST34102012256Test()
{
BigInteger r = new BigInteger("29700980915817952874371204983938256990422752107994319651632687982059210933395");
BigInteger s = new BigInteger("574973400270084654178925310019147038455227042649098563933718999175515839552");
BigInteger e = new BigInteger("20798893674476452017134061561508270130637142515379653289952617252661468872421");
byte[] kData = BigIntegers.AsUnsignedByteArray(new BigInteger("53854137677348463731403841147996619241504003434302020712960838528893196233395"));
SecureRandom k = new TestRandomBigInteger(kData);
BigInteger mod_p = new BigInteger("57896044618658097711785492504343953926634992332820282019728792003956564821041");
BigInteger mod_q = new BigInteger("57896044618658097711785492504343953927082934583725450622380973592137631069619");
ECCurve curve = new FpCurve(
mod_p,
new BigInteger("7"), // a
new BigInteger("43308876546767276905765904595650931995942111794451039583252968842033849580414"), // b
mod_q, BigInteger.One);
ECDomainParameters spec = new ECDomainParameters(curve,
curve.CreatePoint(
new BigInteger("2"), // x
new BigInteger("4018974056539037503335449422937059775635739389905545080690979365213431566280")), // y
mod_q, BigInteger.One);
ECPrivateKeyParameters privateKey = new ECPrivateKeyParameters(
new BigInteger("55441196065363246126355624130324183196576709222340016572108097750006097525544"), // d
spec);
ECPublicKeyParameters publicKey = new ECPublicKeyParameters(curve.CreatePoint(
new BigInteger("57520216126176808443631405023338071176630104906313632182896741342206604859403"), // x
new BigInteger("17614944419213781543809391949654080031942662045363639260709847859438286763994")), // y
spec);
ECGOST3410_2012Signer signer = new ECGOST3410_2012Signer();
signer.Init(true, new ParametersWithRandom(privateKey, k));
byte[] rev = e.ToByteArray();
byte[] message = new byte[rev.Length];
for (int i = 0; i != rev.Length; i++)
{
message[i] = rev[rev.Length - 1 - i];
}
BigInteger[] sig = signer.GenerateSignature(message);
signer.Init(false, publicKey);
if (!signer.VerifySignature(message, sig[0], sig[1]))
{
Fail("ECGOST3410 2012 verification failed");
}
if (!r.Equals(sig[0]))
{
Fail(
": r component wrong." + Environment.NewLine
+ " expecting: " + r + Environment.NewLine
+ " got : " + sig[0]);
}
if (!s.Equals(sig[1]))
{
Fail(
": s component wrong." + Environment.NewLine
+ " expecting: " + s + Environment.NewLine
+ " got : " + sig[1]);
}
// 256Bit
{
DerObjectIdentifier oid = RosstandartObjectIdentifiers.id_tc26_gost_3410_12_256_paramSetA;
ECNamedDomainParameters ecp = new ECNamedDomainParameters(oid, ECGost3410NamedCurves.GetByOid(oid));
ECGOST3410Parameters gostParams = new ECGOST3410Parameters(ecp, oid,
RosstandartObjectIdentifiers.id_tc26_gost_3411_12_256, null);
ECKeyGenerationParameters parameters = new ECKeyGenerationParameters(gostParams, new SecureRandom());
ECKeyPairGenerator engine = new ECKeyPairGenerator();
engine.Init(parameters);
AsymmetricCipherKeyPair pair = engine.GenerateKeyPair();
SignatureGost12Test("ECGOST3410-2012-256", 64, pair);
}
// 512Bit
{
DerObjectIdentifier oid = RosstandartObjectIdentifiers.id_tc26_gost_3410_12_512_paramSetA;
ECNamedDomainParameters ecp = new ECNamedDomainParameters(oid, ECGost3410NamedCurves.GetByOid(oid));
ECGOST3410Parameters gostParams = new ECGOST3410Parameters(ecp, oid,
RosstandartObjectIdentifiers.id_tc26_gost_3411_12_512, null);
ECKeyGenerationParameters parameters = new ECKeyGenerationParameters(gostParams, new SecureRandom());
ECKeyPairGenerator engine = new ECKeyPairGenerator();
engine.Init(parameters);
AsymmetricCipherKeyPair pair = engine.GenerateKeyPair();
SignatureGost12Test("ECGOST3410-2012-512", 128, pair);
}
}