/// <summary>
/// Generate a key pair.
/// </summary>
/// <param name="keyPairType">keyPairType Key pair type to generate</param>
/// <param name="iKeySize">iKeySize Key size of key pair</param>
/// <returns>A key pair</returns>
public static AsymmetricCipherKeyPair GenerateKeyPair(KeyPairType keyPairType, int iKeySize)
{
IAsymmetricCipherKeyPairGenerator keyPairGen = null;
try
{
switch (keyPairType)
{
case KeyPairType.Ec:
keyPairGen = new ECKeyPairGenerator();
break;
case KeyPairType.Dsa:
keyPairGen = new DsaKeyPairGenerator();
break;
//case KeyPairType.Rsa:
default:
keyPairGen = new RsaKeyPairGenerator();
break;
}
// Initialize key pair generator with key strength and a randomness
keyPairGen.Init(new KeyGenerationParameters(Repository.Srand, iKeySize));
// Generate and return the key pair
}
catch (InvalidParameterException ex)
{
}
return keyPairGen.GenerateKeyPair();
}
private void button1_Click(object sender, EventArgs e)
{
ECKeyGenerationParameters keyGenerationParameters = new ECKeyGenerationParameters(parameters, random);
ECKeyPairGenerator keygenerator = new ECKeyPairGenerator("ECGOST3410");
keygenerator.Init(keyGenerationParameters);
AsymmetricCipherKeyPair pair = keygenerator.GenerateKeyPair();
ECPrivateKeyParameters validatorPrivate = (ECPrivateKeyParameters)pair.Private;
ECPublicKeyParameters validatorPublic = (ECPublicKeyParameters)pair.Public;
/*validatorPrivate = new ECPrivateKeyParameters(
"ECGOST3410",
new BigInteger("55441196065363246126355624130324183196576709222340016572108097750006097525544"), // d
parameters);
validatorPublic = new ECPublicKeyParameters(
"ECGOST3410",
new FpPoint(curve,
new FpFieldElement(mod_p, new BigInteger("57520216126176808443631405023338071176630104906313632182896741342206604859403")), // x
new FpFieldElement(mod_p, new BigInteger("17614944419213781543809391949654080031942662045363639260709847859438286763994"))), // y
parameters);
*/
tbValPrivate.Text = validatorPrivate.D.ToString(16);
tbValPublicX.Text = validatorPublic.Q.X.ToBigInteger().ToString(16);
tbValPublicY.Text = validatorPublic.Q.Y.ToBigInteger().ToString(16);
}
public AsymmetricCipherKeyPair GenerateEphemeralKey(TEllipticCurve curve)
{
ECDomainParameters ecParams = EllipticCurveFactory.GetEllipticCurveParameters(curve);
ECKeyPairGenerator keyPairGenerator = new ECKeyPairGenerator();
SecureRandom random = new SecureRandom();
keyPairGenerator.Init(new ECKeyGenerationParameters(ecParams, random));
return keyPairGenerator.GenerateKeyPair();
}
public AsymmetricCipherKeyPair generateKeypair() {
var eckeygen = new ECKeyGenerationParameters (spec, securerng);
var keygen = new ECKeyPairGenerator ();
keygen.Init (eckeygen);
var kp = keygen.GenerateKeyPair ();
return kp;
}
private static AsymmetricCipherKeyPair GenerateKeyPairEcc()
{
var oid = X962NamedCurves.GetOid("prime256v1");
var generator = new ECKeyPairGenerator();
var genParam = new ECKeyGenerationParameters(oid, RandomUtil.SecureRandomBc);
generator.Init(genParam);
return generator.GenerateKeyPair();
}
public ECKeyPair GenerateKeyPair(byte[] applicationSha256, byte[] challengeSha256)
{
var conf = new ECKeyGenerationParameters(SecObjectIdentifiers.SecP256r1, new SecureRandom());
var keyGen = new ECKeyPairGenerator("ECDSA");
keyGen.Init(conf);
var pair = keyGen.GenerateKeyPair();
return new ECKeyPair((ECPublicKeyParameters) pair.Public, (ECPrivateKeyParameters) pair.Private);
}
public void GenerateEphemeralKey()
{
EllipticCurveParameters = EllipticCurveFactory.GetEllipticCurveParameters(Curve);
ECKeyPairGenerator keyPairGenerator = new ECKeyPairGenerator();
SecureRandom random = new SecureRandom();
keyPairGenerator.Init(new ECKeyGenerationParameters(EllipticCurveParameters, random));
AsymmetricCipherKeyPair keys = keyPairGenerator.GenerateKeyPair();
PrivateKey = (ECPrivateKeyParameters)keys.Private;
PublicKey = (ECPublicKeyParameters)keys.Public;
}
/// <summary>
/// Generates an entirely new keypair.
/// </summary>
public ECKey() {
var generator = new ECKeyPairGenerator();
var keygenParams = new ECKeyGenerationParameters(_ecParams, _secureRandom);
generator.Init(keygenParams);
var keypair = generator.GenerateKeyPair();
var privParams = (ECPrivateKeyParameters)keypair.Private;
var pubParams = (ECPublicKeyParameters)keypair.Public;
_priv = privParams.D;
// The public key is an encoded point on the elliptic curve. It has no meaning independent of the curve.
_pub = pubParams.Q.GetEncoded();
}
public Account()
{
var namedCurve = NistNamedCurves.GetByName("P-256");
var ecdomp = new ECDomainParameters(namedCurve.Curve, namedCurve.G, namedCurve.N);
var srnd = new SecureRandom();
var eckeygenparams = new ECKeyGenerationParameters(ecdomp, srnd);
var g = new ECKeyPairGenerator("ECDSA");
g.Init(eckeygenparams);
keyPair = g.GenerateKeyPair();
address = generateAddress(keyPair.Public);
this.Label = "(no label)";
}
public void InitForEncryption(ISecureRandom random, ECDHPublicKeyParameters publicKey, byte[] fingerPrint, out ECDHPublicKeyParameters ephemeralPublicKey)
{
var genParams = publicKey.CreateKeyGenerationParameters(random, publicKey.HashAlgorithm, publicKey.SymmetricKeyAlgorithm);
var generator = new ECKeyPairGenerator("ECDH");
generator.Init(genParams);
var ephemeralKeyPair = generator.GenerateKeyPair();
_fingerPrint = (byte[])fingerPrint.Clone();
_privateKey = (ECPrivateKeyParameters)ephemeralKeyPair.Private;
_publicKey = publicKey;
_forEncryption = true;
ephemeralPublicKey = (ECDHPublicKeyParameters)ephemeralKeyPair.Public;
}
// Section 7.2.5 ECSP-NR, pg 34
/**
* generate a signature for the given message using the key we were
* initialised with. Generally, the order of the curve should be at
* least as long as the hash of the message of interest, and with
* ECNR it *must* be at least as long.
*
* @param digest the digest to be signed.
* @exception DataLengthException if the digest is longer than the key allows
*/
public IBigInteger[] GenerateSignature(
byte[] message)
{
if (!this._forSigning)
{
// not properly initilaized... deal with it
throw new InvalidOperationException("not initialised for signing");
}
IBigInteger n = ((ECPrivateKeyParameters)this._key).Parameters.N;
int nBitLength = n.BitLength;
IBigInteger e = new BigInteger(1, message);
int eBitLength = e.BitLength;
ECPrivateKeyParameters privKey = (ECPrivateKeyParameters)_key;
if (eBitLength > nBitLength)
{
throw new DataLengthException("input too large for ECNR key.");
}
IBigInteger r = null;
IBigInteger s = null;
IAsymmetricCipherKeyPair tempPair;
do // generate r
{
// generate another, but very temporary, key pair using
// the same EC parameters
ECKeyPairGenerator keyGen = new ECKeyPairGenerator();
keyGen.Init(new ECKeyGenerationParameters(privKey.Parameters, _random));
tempPair = keyGen.GenerateKeyPair();
// IBigInteger Vx = tempPair.getPublic().getW().getAffineX();
ECPublicKeyParameters V = (ECPublicKeyParameters) tempPair.Public; // get temp's public key
IBigInteger Vx = V.Q.X.ToBigInteger(); // get the point's x coordinate
r = Vx.Add(e).Mod(n);
}
while (r.SignValue == 0);
// generate s
IBigInteger x = privKey.D; // private key value
IBigInteger u = ((ECPrivateKeyParameters)tempPair.Private).D; // temp's private key value
s = u.Subtract(r.Multiply(x)).Mod(n);
return new IBigInteger[] { r, s };
}
/// <summary>
/// Initialize new CKeyPair instance with random secret.
/// </summary>
public CKeyPair(bool Compressed = true)
{
var genParams = new ECKeyGenerationParameters(domain, new SecureRandom());
var generator = new ECKeyPairGenerator("ECDSA");
generator.Init(genParams);
var ecKeyPair = generator.GenerateKeyPair();
_Private = (ECPrivateKeyParameters)ecKeyPair.Private;
_Public = (ECPublicKeyParameters)ecKeyPair.Public;
if (Compressed)
{
_Public = Compress(_Public);
}
}
/// <summary>
/// This generates an elliptic curve key pair. Uses BouncyCastle library for generation.
/// Hijacked by the BES Random Generator.
/// </summary>
/// <param name="keyGen"></param>
/// <param name="keySize"></param>
/// <returns></returns>
public static AsymmetricCipherKeyPair GenerateKeyPair(IBasylKeyGenerator keyGen, string curveName)
{
var ecGenerator = new ECKeyPairGenerator("ECDH");
var ecp = GetCurveFromName(curveName);
ECDomainParameters ecSpec = new ECDomainParameters(ecp.Curve, ecp.G, ecp.N, ecp.H, ecp.GetSeed());
ECKeyGenerationParameters ecgp = new ECKeyGenerationParameters(ecSpec, new BasylSecureRandom(keyGen));
ecGenerator.Init(ecgp);
AsymmetricCipherKeyPair keys = ecGenerator.GenerateKeyPair();
return keys;
}
public static ECKeyPair Generate (X9ECParameters curve, bool compressed = true)
{
ECKeyPairGenerator generator = new ECKeyPairGenerator ();
ECDomainParameters newDomain = new ECDomainParameters(curve.Curve, curve.G, curve.N);
ECKeyGenerationParameters keygenParams = new ECKeyGenerationParameters (newDomain, secureRandom);
generator.Init (keygenParams);
var keyPair = generator.GenerateKeyPair ();
ECPrivateKeyParameters privParams = (ECPrivateKeyParameters) keyPair.Private;
ECPublicKeyParameters pubParams = (ECPublicKeyParameters) keyPair.Public;
ECKeyPair k = new ECKeyPair ();
k.Domain = newDomain;
k.Curve = curve;
k.priv = privParams.D;
k.pub = pubParams.Q.GetEncoded (compressed);
return k;
}
public Tuple<ECPrivateKeyParameters, ECPublicKeyParameters> CreateKeyPair()
{
var curve = SecNamedCurves.GetByName("secp256k1");
var domainParameters = new ECDomainParameters(curve.Curve, curve.G, curve.N, curve.H, curve.GetSeed());
var generator = new ECKeyPairGenerator();
generator.Init(new ECKeyGenerationParameters(domainParameters, new SecureRandom()));
var keyPair = new MethodTimer(false).Time("GenerateKeyPair", () => generator.GenerateKeyPair());
var privateKey = (ECPrivateKeyParameters)keyPair.Private;
var publicKey = (ECPublicKeyParameters)keyPair.Public;
//Debug.WriteLine("Private: {0}".Format2(privateKey.D.ToHexNumberStringUnsigned()));
//Debug.WriteLine("Public X: {0}".Format2(publicKey.Q.X.ToBigInteger().ToHexNumberStringUnsigned()));
//Debug.WriteLine("Public Y: {0}".Format2(publicKey.Q.Y.ToBigInteger().ToHexNumberStringUnsigned()));
return Tuple.Create(privateKey, publicKey);
}
public static string GeneratePrivateKey()
{
ECKeyPairGenerator gen = new ECKeyPairGenerator();
var secureRandom = new SecureRandom(new byte[] { 1, 2, 3, 4, 6 });
var ps = Org.BouncyCastle.Asn1.Sec.SecNamedCurves.GetByName("secp256k1");
var ecParams = new ECDomainParameters(ps.Curve, ps.G, ps.N, ps.H);
var keyGenParam = new ECKeyGenerationParameters(ecParams, secureRandom);
gen.Init(keyGenParam);
AsymmetricCipherKeyPair kp = gen.GenerateKeyPair();
ECPrivateKeyParameters priv = (ECPrivateKeyParameters)kp.Private;
byte[] hexpriv = priv.D.ToByteArrayUnsigned();
var privateKey = ByteArrayToString(hexpriv);
return privateKey;
}
/// <summary>
/// Create ECDSA and generates new key pair
/// </summary>
/// <param name="type">0 or 1 (1 faster)</param>
/// <param name="forSign">if created for signing, otherwise for verifying</param>
public ECDSAWrapper(int type, bool forSign)
{
try
{
this.initCurveandParams(type);
SecureRandom random = new SecureRandom();
ECKeyGenerationParameters genParam = new ECKeyGenerationParameters(this.parameters, random);
ECKeyPairGenerator pGen = new ECKeyPairGenerator();
pGen.Init(genParam);
this.pair = pGen.GenerateKeyPair();
if (forSign)
this.ecdsa.Init(true, new ParametersWithRandom(this.pair.Private, random));
else
this.ecdsa.Init(false, this.pair.Public);
}
catch (Exception ex)
{
throw new Exception("Error while creating ECDSA with new key pair", ex);
}
}
public override void PerformTest()
{
StaticTest();
FpCurve curve = new FpCurve(
new BigInteger("6277101735386680763835789423207666416083908700390324961279"), // q
new BigInteger("fffffffffffffffffffffffffffffffefffffffffffffffc", 16), // a
new BigInteger("64210519e59c80e70fa7e9ab72243049feb8deecc146b9b1", 16)); // b
ECDomainParameters parameters = new ECDomainParameters(
curve,
curve.DecodePoint(Hex.Decode("03188da80eb03090f67cbf20eb43a18800f4ff0afd82ff1012")), // G
new BigInteger("6277101735386680763835789423176059013767194773182842284081")); // n
ECKeyPairGenerator eGen = new ECKeyPairGenerator();
KeyGenerationParameters gParam = new ECKeyGenerationParameters(parameters, new SecureRandom());
eGen.Init(gParam);
AsymmetricCipherKeyPair p1 = eGen.GenerateKeyPair();
AsymmetricCipherKeyPair p2 = eGen.GenerateKeyPair();
DoTest(p1, p2);
}
/** Generates an entirely new keypair. */
public CMicroCashKeyPair(bool bGenerate)
{
if(bGenerate)
{
ECKeyPairGenerator gen = new ECKeyPairGenerator();
var secureRandom = new SecureRandom();
var ps = Org.BouncyCastle.Asn1.Sec.SecNamedCurves.GetByName("secp256k1");
var ecParams = new ECDomainParameters(ps.Curve, ps.G, ps.N, ps.H);
var keyGenParam = new ECKeyGenerationParameters(ecParams, secureRandom);
gen.Init(keyGenParam);
AsymmetricCipherKeyPair kp = gen.GenerateKeyPair();
ECPrivateKeyParameters priv = (ECPrivateKeyParameters)kp.Private;
ECPublicKeyParameters pub = (ECPublicKeyParameters)kp.Public;
byte[] hexpriv = priv.D.ToByteArrayUnsigned();
//byte[] hexPub = pub
Org.BouncyCastle.Math.BigInteger Db = new Org.BouncyCastle.Math.BigInteger(1,hexpriv);
ECPoint dd = ps.G.Multiply(Db);
byte[] pubaddr = new byte[65];
byte[] Y = dd.Y.ToBigInteger().ToByteArray();
Array.Copy(Y, 0, pubaddr, 64 - Y.Length + 1, Y.Length);
byte[] X = dd.X.ToBigInteger().ToByteArray();
Array.Copy(X, 0, pubaddr, 32 - X.Length + 1, X.Length);
pubaddr[0] = 4;
m_Priv = new BigInteger(hexpriv);
m_Pub = pubaddr;
m_Address = ConvertPubKeyToAddress(m_Pub);
m_PubKeyString = bytesToHexString(m_Pub);
m_PrivKeyString = bytesToHexString(m_Priv.ToByteArray());
}
}
public static AsymmetricCipherKeyPair GenerateECKeyPair(SecureRandom random, ECDomainParameters ecParams)
{
ECKeyPairGenerator keyPairGenerator = new ECKeyPairGenerator();
keyPairGenerator.Init(new ECKeyGenerationParameters(ecParams, random));
return keyPairGenerator.GenerateKeyPair();
}
public static ECKey GenerateKey()
{
//mixing bouncy implementation
var gen = new ECKeyPairGenerator();
var keyGenParam = new KeyGenerationParameters(SecureRandom, 256);
gen.Init(keyGenParam);
var keyPair = gen.GenerateKeyPair();
var privateBytes = ((ECPrivateKeyParameters)keyPair.Private).D.ToByteArray();
return new ECKey(privateBytes, true);
}
public void TestMethod1()
{
// this snippet can be easily used in any normal c# project as well by simply removing the .Dump() methods
// and saving the output into a variable / file of your choice.
// you'll need to add BouncyCastle.Crypto nuget to use this.
// tested on 1.8.0-beta4
AsymmetricCipherKeyPair pair;
Pkcs10CertificationRequest csr;
var ecMode = false;
var values = new Dictionary<DerObjectIdentifier, string> {
{X509Name.CN, ""}, //domain name
{X509Name.OU, "Domain Control Validated"},
{X509Name.O, ""}, //Organisation's Legal name
{X509Name.L, "London"},
{X509Name.ST, "England"},
{X509Name.C, "GB"},
};
var subjectAlternateNames = new GeneralName[] { };
var extensions = new Dictionary<DerObjectIdentifier, X509Extension>()
{
{X509Extensions.BasicConstraints, new X509Extension(true, new DerOctetString(new BasicConstraints(false)))},
{X509Extensions.KeyUsage, new X509Extension(true, new DerOctetString(new KeyUsage(KeyUsage.DigitalSignature | KeyUsage.KeyEncipherment | KeyUsage.DataEncipherment | KeyUsage.NonRepudiation)))},
{X509Extensions.ExtendedKeyUsage, new X509Extension(false, new DerOctetString(new ExtendedKeyUsage(KeyPurposeID.IdKPServerAuth)))},
};
if (values[X509Name.CN].StartsWith("www.")) values[X509Name.CN] = values[X509Name.CN].Substring(4);
if (!values[X509Name.CN].StartsWith("*.") && subjectAlternateNames.Length == 0)
subjectAlternateNames = new GeneralName[] { new GeneralName(GeneralName.DnsName, $"www.{values[X509Name.CN]}") };
if (subjectAlternateNames.Length > 0) extensions.Add(X509Extensions.SubjectAlternativeName, new X509Extension(false, new DerOctetString(new GeneralNames(subjectAlternateNames))));
var subject = new X509Name(values.Keys.Reverse().ToList(), values);
if (ecMode)
{
var gen = new ECKeyPairGenerator();
var ecp = Org.BouncyCastle.Asn1.Sec.SecNamedCurves.GetByName("secp384r1");
gen.Init(new ECKeyGenerationParameters(new ECDomainParameters(ecp.Curve, ecp.G, ecp.N, ecp.H, ecp.GetSeed()), new SecureRandom()));
pair = gen.GenerateKeyPair();
extensions.Add(X509Extensions.SubjectKeyIdentifier, new X509Extension(false, new DerOctetString(new SubjectKeyIdentifierStructure(pair.Public))));
csr = new Pkcs10CertificationRequest("SHA256withECDSA", subject, pair.Public, new DerSet(new AttributePkcs(PkcsObjectIdentifiers.Pkcs9AtExtensionRequest, new DerSet(new X509Extensions(extensions)))), pair.Private);
}
else
{
var gen = new RsaKeyPairGenerator();
gen.Init(new KeyGenerationParameters(new SecureRandom(), 2048));
pair = gen.GenerateKeyPair();
extensions.Add(X509Extensions.SubjectKeyIdentifier, new X509Extension(false, new DerOctetString(new SubjectKeyIdentifierStructure(pair.Public))));
csr = new Pkcs10CertificationRequest("SHA256withRSA", subject, pair.Public, new DerSet(new AttributePkcs(PkcsObjectIdentifiers.Pkcs9AtExtensionRequest, new DerSet(new X509Extensions(extensions)))), pair.Private);
}
//Convert BouncyCastle csr to .PEM file.
var csrPem = new StringBuilder();
var csrPemWriter = new PemWriter(new StringWriter(csrPem));
csrPemWriter.WriteObject(csr);
csrPemWriter.Writer.Flush();
Console.WriteLine(csrPem.ToString());
var privateKeyPem = new StringBuilder();
var privateKeyPemWriter = new PemWriter(new StringWriter(privateKeyPem));
privateKeyPemWriter.WriteObject(pair.Private);
csrPemWriter.Writer.Flush();
//privateKeyPem.ToString().Dump("Private Key");
}
protected virtual AsymmetricCipherKeyPair GenerateECKeyPair(ECDomainParameters ecParams)
{
ECKeyPairGenerator keyPairGenerator = new ECKeyPairGenerator();
ECKeyGenerationParameters keyGenerationParameters = new ECKeyGenerationParameters(ecParams,
context.SecureRandom);
keyPairGenerator.Init(keyGenerationParameters);
return keyPairGenerator.GenerateKeyPair();
}
public static Ecdsa Generate()
{
X9ECParameters ecParams = Org.BouncyCastle.Asn1.Sec.SecNamedCurves.GetByName("secp256k1");
ECDomainParameters domainParameters = new ECDomainParameters(ecParams.Curve,
ecParams.G, ecParams.N, ecParams.H,
ecParams.GetSeed());
ECKeyGenerationParameters keyGenParams =
new ECKeyGenerationParameters(domainParameters, new SecureRandom());
AsymmetricCipherKeyPair keyPair;
ECKeyPairGenerator generator = new ECKeyPairGenerator();
generator.Init(keyGenParams);
keyPair = generator.GenerateKeyPair();
ECPrivateKeyParameters privateKey = (ECPrivateKeyParameters) keyPair.Private;
ECPublicKeyParameters publicKey = (ECPublicKeyParameters) keyPair.Public;
return new Ecdsa(publicKey.Q.GetEncoded(), privateKey.D.ToByteArrayUnsigned());
}
public static EncryptionResult EncryptMessage(byte[] userKey, byte[] userSecret, byte[] data, ushort padding = 0, bool randomisePadding = false)
{
var Random = new SecureRandom();
var Salt = new byte[16];
Random.NextBytes(Salt);
var Curve = ECNamedCurveTable.GetByName("prime256v1");
var Spec = new ECDomainParameters(Curve.Curve, Curve.G, Curve.N, Curve.H, Curve.GetSeed());
var Generator = new ECKeyPairGenerator();
Generator.Init(new ECKeyGenerationParameters(Spec, new SecureRandom()));
var KeyPair = Generator.GenerateKeyPair();
var AgreementGenerator = new ECDHBasicAgreement();
AgreementGenerator.Init(KeyPair.Private);
var IKM =
AgreementGenerator.CalculateAgreement(new ECPublicKeyParameters(Spec.Curve.DecodePoint(userKey), Spec));
var PRK = GenerateHKDF(userSecret, IKM.ToByteArrayUnsigned(),
Encoding.UTF8.GetBytes("Content-Encoding: auth\0"), 32);
var PublicKey = ((ECPublicKeyParameters)KeyPair.Public).Q.GetEncoded(false);
var CEK = GenerateHKDF(Salt, PRK, CreateInfoChunk("aesgcm", userKey, PublicKey), 16);
var Nonce = GenerateHKDF(Salt, PRK, CreateInfoChunk("nonce", userKey, PublicKey), 12);
if (randomisePadding && (padding > 0)) padding = Convert.ToUInt16(Math.Abs(Random.NextInt()) % (padding + 1));
var Input = new byte[padding + 2 + data.Length];
Buffer.BlockCopy(ConvertInt(padding), 0, Input, 0, 2);
Buffer.BlockCopy(data, 0, Input, padding + 2, data.Length);
var Cipher = CipherUtilities.GetCipher("AES/GCM/NoPadding");
Cipher.Init(true, new AeadParameters(new KeyParameter(CEK), 128, Nonce));
var Message = new byte[Cipher.GetOutputSize(Input.Length)];
Cipher.DoFinal(Input, 0, Input.Length, Message, 0);
return new EncryptionResult { Salt = Salt, Payload = Message, PublicKey = PublicKey };
}
public void TestECBasicAgreementTest()
{
SecureRandom random = new SecureRandom();
FpCurve curve = new FpCurve(
new BigInteger("883423532389192164791648750360308885314476597252960362792450860609699839"), // q
new BigInteger("7fffffffffffffffffffffff7fffffffffff8000000000007ffffffffffc", 16), // a
new BigInteger("6b016c3bdcf18941d0d654921475ca71a9db2fb27d1d37796185c2942c0a", 16)); // b
ECDomainParameters parameters = new ECDomainParameters(
curve,
curve.DecodePoint(Hex.Decode("020ffa963cdca8816ccc33b8642bedf905c3d358573d3f27fbbd3b3cb9aaaf")), // G
new BigInteger("883423532389192164791648750360308884807550341691627752275345424702807307")); // n
ECKeyPairGenerator pGen = new ECKeyPairGenerator();
ECKeyGenerationParameters genParam = new ECKeyGenerationParameters(parameters, random);
pGen.Init(genParam);
AsymmetricCipherKeyPair p1 = pGen.GenerateKeyPair();
AsymmetricCipherKeyPair p2 = pGen.GenerateKeyPair();
//
// two way
//
IBasicAgreement e1 = new ECDHBasicAgreement();
IBasicAgreement e2 = new ECDHBasicAgreement();
e1.Init(p1.Private);
e2.Init(p2.Private);
BigInteger k1 = e1.CalculateAgreement(p2.Public);
BigInteger k2 = e2.CalculateAgreement(p1.Public);
if (!k1.Equals(k2))
{
Fail("calculated agreement test failed");
}
//
// two way
//
e1 = new ECDHCBasicAgreement();
e2 = new ECDHCBasicAgreement();
e1.Init(p1.Private);
e2.Init(p2.Private);
k1 = e1.CalculateAgreement(p2.Public);
k2 = e2.CalculateAgreement(p1.Public);
if (!k1.Equals(k2))
{
Fail("calculated agreement test failed");
}
}
public void TestECMqvRandom()
{
SecureRandom random = new SecureRandom();
FpCurve curve = new FpCurve(
new BigInteger("883423532389192164791648750360308885314476597252960362792450860609699839"), // q
new BigInteger("7fffffffffffffffffffffff7fffffffffff8000000000007ffffffffffc", 16), // a
new BigInteger("6b016c3bdcf18941d0d654921475ca71a9db2fb27d1d37796185c2942c0a", 16)); // b
ECDomainParameters parameters = new ECDomainParameters(
curve,
curve.DecodePoint(Hex.Decode("020ffa963cdca8816ccc33b8642bedf905c3d358573d3f27fbbd3b3cb9aaaf")), // G
new BigInteger("883423532389192164791648750360308884807550341691627752275345424702807307")); // n
ECKeyPairGenerator pGen = new ECKeyPairGenerator();
pGen.Init(new ECKeyGenerationParameters(parameters, random));
// Pre-established key pairs
AsymmetricCipherKeyPair U1 = pGen.GenerateKeyPair();
AsymmetricCipherKeyPair V1 = pGen.GenerateKeyPair();
// Ephemeral key pairs
AsymmetricCipherKeyPair U2 = pGen.GenerateKeyPair();
AsymmetricCipherKeyPair V2 = pGen.GenerateKeyPair();
BigInteger x = calculateAgreement(U1, U2, V1, V2);
if (x == null)
{
Fail("MQV Test Vector (random) agreement failed");
}
}
public void TestECDsaKeyGenTest()
{
SecureRandom random = new SecureRandom();
FpCurve curve = new FpCurve(
new BigInteger("883423532389192164791648750360308885314476597252960362792450860609699839"), // q
new BigInteger("7fffffffffffffffffffffff7fffffffffff8000000000007ffffffffffc", 16), // a
new BigInteger("6b016c3bdcf18941d0d654921475ca71a9db2fb27d1d37796185c2942c0a", 16)); // b
ECDomainParameters parameters = new ECDomainParameters(
curve,
curve.DecodePoint(Hex.Decode("020ffa963cdca8816ccc33b8642bedf905c3d358573d3f27fbbd3b3cb9aaaf")), // G
new BigInteger("883423532389192164791648750360308884807550341691627752275345424702807307")); // n
ECKeyPairGenerator pGen = new ECKeyPairGenerator();
ECKeyGenerationParameters genParam = new ECKeyGenerationParameters(
parameters,
random);
pGen.Init(genParam);
AsymmetricCipherKeyPair pair = pGen.GenerateKeyPair();
ParametersWithRandom param = new ParametersWithRandom(pair.Private, random);
ECDsaSigner ecdsa = new ECDsaSigner();
ecdsa.Init(true, param);
byte[] message = new BigInteger("968236873715988614170569073515315707566766479517").ToByteArray();
BigInteger[] sig = ecdsa.GenerateSignature(message);
ecdsa.Init(false, pair.Public);
if (!ecdsa.VerifySignature(message, sig[0], sig[1]))
{
Fail("signature fails");
}
}
public void TestECDsaP256Sha256WithGeneratedKey()
{
var secureRandom = new SecureRandom();
X9ECParameters p = NistNamedCurves.GetByName("P-256");
var parameters = new ECDomainParameters(p.Curve, p.G, p.N, p.H);
var ecParams = new ECKeyGenerationParameters(parameters, secureRandom);
var ecGen = new ECKeyPairGenerator("ECDSA");
ecGen.Init(ecParams);
var pairKey = ecGen.GenerateKeyPair();
var priKey = pairKey.Private as ECPrivateKeyParameters;
byte[] m = Hex.Decode("1BD4ED430B0F384B4E8D458EFF1A8A553286D7AC21CB2F6806172EF5F94A06AD");
var dsa = new ECDsaSigner();
dsa.Init(true, new ParametersWithRandom(priKey, secureRandom));
IBigInteger[] sig = dsa.GenerateSignature(m);
// Verify the signature
var pubKey = pairKey.Public as ECPublicKeyParameters;
dsa.Init(false, pubKey);
if (!dsa.VerifySignature(m, sig[0], sig[1]))
{
Fail("signature fails");
}
}
public static void FullSignatureTest(byte[] hash)
{
X9ECParameters ecParams = Org.BouncyCastle.Asn1.Sec.SecNamedCurves.GetByName("secp256k1");
ECDomainParameters domainParameters = new ECDomainParameters(ecParams.Curve,
ecParams.G, ecParams.N, ecParams.H,
ecParams.GetSeed());
ECKeyGenerationParameters keyGenParams =
new ECKeyGenerationParameters(domainParameters, new SecureRandom());
AsymmetricCipherKeyPair keyPair;
ECKeyPairGenerator generator = new ECKeyPairGenerator();
generator.Init(keyGenParams);
keyPair = generator.GenerateKeyPair();
ECPrivateKeyParameters privateKey = (ECPrivateKeyParameters) keyPair.Private;
ECPublicKeyParameters publicKey = (ECPublicKeyParameters) keyPair.Public;
Console.WriteLine("Generated private key: " + ToHex(privateKey.D.ToByteArrayUnsigned()));
Console.WriteLine("Generated public key: " + ToHex(publicKey.Q.GetEncoded()));
ECDsaSigner signer = new ECDsaSigner();
signer.Init(true, privateKey);
BigInteger[] sig = signer.GenerateSignature(hash);
int recid = -1;
for (int rec=0; rec<4; rec++) {
try
{
ECPoint Q = ECDSA_SIG_recover_key_GFp(sig, hash, rec, true);
if (ToHex(publicKey.Q.GetEncoded()).Equals(ToHex(Q.GetEncoded())))
{
recid = rec;
break;
}
}
catch (Exception)
{
continue;
}
}
if (recid < 0) throw new Exception("Did not find proper recid");
byte[] fullSigBytes = new byte[65];
fullSigBytes[0] = (byte) (27+recid);
Buffer.BlockCopy(sig[0].ToByteArrayUnsigned(), 0, fullSigBytes, 1, 32);
Buffer.BlockCopy(sig[1].ToByteArrayUnsigned(), 0, fullSigBytes, 33, 32);
Console.WriteLine("Generated full signature: " + Convert.ToBase64String(fullSigBytes));
byte[] sigBytes = new byte[64];
Buffer.BlockCopy(sig[0].ToByteArrayUnsigned(), 0, sigBytes, 0, 32);
Buffer.BlockCopy(sig[1].ToByteArrayUnsigned(), 0, sigBytes, 32, 32);
ECPoint genQ = ECDSA_SIG_recover_key_GFp(sig, hash, recid, false);
Console.WriteLine("Generated signature verifies: " + VerifySignature(genQ.GetEncoded(), hash, sigBytes));
}
