public void TestRsaDigestSigner()
{
BigInteger rsaPubMod = new BigInteger(Base64.Decode("AIASoe2PQb1IP7bTyC9usjHP7FvnUMVpKW49iuFtrw/dMpYlsMMoIU2jupfifDpdFxIktSB4P+6Ymg5WjvHKTIrvQ7SR4zV4jaPTu56Ys0pZ9EDA6gb3HLjtU+8Bb1mfWM+yjKxcPDuFjwEtjGlPHg1Vq+CA9HNcMSKNn2+tW6qt"));
BigInteger rsaPubExp = new BigInteger(Base64.Decode("EQ=="));
BigInteger rsaPrivMod = new BigInteger(Base64.Decode("AIASoe2PQb1IP7bTyC9usjHP7FvnUMVpKW49iuFtrw/dMpYlsMMoIU2jupfifDpdFxIktSB4P+6Ymg5WjvHKTIrvQ7SR4zV4jaPTu56Ys0pZ9EDA6gb3HLjtU+8Bb1mfWM+yjKxcPDuFjwEtjGlPHg1Vq+CA9HNcMSKNn2+tW6qt"));
BigInteger rsaPrivDP = new BigInteger(Base64.Decode("JXzfzG5v+HtLJIZqYMUefJfFLu8DPuJGaLD6lI3cZ0babWZ/oPGoJa5iHpX4Ul/7l3s1PFsuy1GhzCdOdlfRcQ=="));
BigInteger rsaPrivDQ = new BigInteger(Base64.Decode("YNdJhw3cn0gBoVmMIFRZzflPDNthBiWy/dUMSRfJCxoZjSnr1gysZHK01HteV1YYNGcwPdr3j4FbOfri5c6DUQ=="));
BigInteger rsaPrivExp = new BigInteger(Base64.Decode("DxFAOhDajr00rBjqX+7nyZ/9sHWRCCp9WEN5wCsFiWVRPtdB+NeLcou7mWXwf1Y+8xNgmmh//fPV45G2dsyBeZbXeJwB7bzx9NMEAfedchyOwjR8PYdjK3NpTLKtZlEJ6Jkh4QihrXpZMO4fKZWUm9bid3+lmiq43FwW+Hof8/E="));
BigInteger rsaPrivP = new BigInteger(Base64.Decode("AJ9StyTVW+AL/1s7RBtFwZGFBgd3zctBqzzwKPda6LbtIFDznmwDCqAlIQH9X14X7UPLokCDhuAa76OnDXb1OiE="));
BigInteger rsaPrivQ = new BigInteger(Base64.Decode("AM3JfD79dNJ5A3beScSzPtWxx/tSLi0QHFtkuhtSizeXdkv5FSba7lVzwEOGKHmW829bRoNxThDy4ds1IihW1w0="));
BigInteger rsaPrivQinv = new BigInteger(Base64.Decode("Lt0g7wrsNsQxuDdB8q/rH8fSFeBXMGLtCIqfOec1j7FEIuYA/ACiRDgXkHa0WgN7nLXSjHoy630wC5Toq8vvUg=="));
RsaKeyParameters rsaPublic = new RsaKeyParameters(false, rsaPubMod, rsaPubExp);
RsaPrivateCrtKeyParameters rsaPrivate = new RsaPrivateCrtKeyParameters(rsaPrivMod, rsaPubExp, rsaPrivExp, rsaPrivP, rsaPrivQ, rsaPrivDP, rsaPrivDQ, rsaPrivQinv);
byte[] msg = new byte[] { 1, 6, 3, 32, 7, 43, 2, 5, 7, 78, 4, 23 };
RsaDigestSigner signer = new RsaDigestSigner(new Sha1Digest());
signer.Init(true, rsaPrivate);
signer.BlockUpdate(msg, 0, msg.Length);
byte[] sig = signer.GenerateSignature();
signer.Init(false,rsaPublic);
signer.BlockUpdate(msg, 0, msg.Length);
Assert.IsTrue(signer.VerifySignature(sig), "RSA IDigest Signer failed.");
}
internal BigInteger CalculatePublic(
BigInteger p,
BigInteger g,
BigInteger x)
{
return g.ModPow(x, p);
}
/// <summary>
/// Derive the public key by doing a point multiply of G * priv.
/// </summary>
private static byte[] pPublicKeyFromPrivate(Org.BouncyCastle.Math.BigInteger privKey, bool compressedPublicKey)
{
if (!compressedPublicKey)
{
//not compressed public key
return(_ecParams.G.Multiply(privKey).GetEncoded());
}
//below is for compressed public key
int Y = _ecParams.G.Multiply(privKey).YCoord.ToBigInteger().IntValue;
byte b;
if (Y % 2 == 0)
{
b = 2;
}
else
{
b = 3;
}
byte[] pub = _ecParams.G.Multiply(privKey).GetEncoded().Take(33).ToArray();
pub[0] = b;
return(pub);
}
protected ECPublicBcpgKey(
DerObjectIdentifier oid,
ECPoint point)
{
this.point = new BigInteger(1, point.GetEncoded());
this.oid = oid;
}
/// <summary>
/// Computes the public key from the private key.
/// </summary>
protected override byte[] ComputePublicKey()
{
var ps = Org.BouncyCastle.Asn1.Sec.SecNamedCurves.GetByName("secp256k1");
ECPoint point = ps.G;
Org.BouncyCastle.Math.BigInteger Db = new Org.BouncyCastle.Math.BigInteger(1, _privKey);
ECPoint dd = point.Multiply(Db);
if (IsCompressedPoint)
{
dd = ps.Curve.CreatePoint(dd.X.ToBigInteger(), dd.Y.ToBigInteger(), true);
return(dd.GetEncoded());
}
else
{
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;
return(pubaddr);
}
}
protected ECPublicBcpgKey(
DerObjectIdentifier oid,
BigInteger encodedPoint)
{
this.point = encodedPoint;
this.oid = oid;
}
private static ECPoint ImplShamirsTrick(ECPoint P, BigInteger k,
ECPoint Q, BigInteger l)
{
int m = System.Math.Max(k.BitLength, l.BitLength);
ECPoint Z = P.Add(Q);
ECPoint R = P.Curve.Infinity;
for (int i = m - 1; i >= 0; --i)
{
R = R.Twice();
if (k.TestBit(i))
{
if (l.TestBit(i))
{
R = R.Add(Z);
}
else
{
R = R.Add(P);
}
}
else
{
if (l.TestBit(i))
{
R = R.Add(Q);
}
}
}
return R;
}
public DHPrivateKeyParameters(
BigInteger x,
DHParameters parameters)
: base(true, parameters)
{
this.x = x;
}
public RSA(int bits)
{
p = Helper.GenerateBigIntegerPrimes(bits);
//p = new Org.BouncyCastle.Math.BigInteger("3557");
q = Helper.GenerateBigIntegerPrimes(bits);
//q = new Org.BouncyCastle.Math.BigInteger("2579");
Console.WriteLine("p generated " + p);
Console.WriteLine("q generated " + q);
n = p.Multiply(q);
Console.WriteLine("n = " + n);
BigInteger p1 = p.Subtract(new BigInteger("1"));
BigInteger q1 = q.Subtract(new BigInteger("1"));
fn = p1.Multiply(q1);
Console.WriteLine("Функция Эйлера = " + fn);
int[] er = new[] { 17, 257, 65537 };
Random rand = new Random((int)System.DateTime.Now.Ticks);
e = new BigInteger(er[rand.Next(0, er.Length)].ToString());
Console.WriteLine("e = " + e);
d = e.ModInverse(fn);
Console.WriteLine("d = " + d);
Console.WriteLine("Public Key: " + e + ", " + n);
Console.WriteLine("Private Key: " + d + ", " + n);
}
/// <param name="n">The modulus.</param>
/// <param name="e">The public exponent.</param>
public RsaPublicBcpgKey(
BigInteger n,
BigInteger e)
{
this.n = new MPInteger(n);
this.e = new MPInteger(e);
}
public X9ECParameters(
ECCurve curve,
ECPoint g,
BigInteger n)
: this(curve, g, n, BigInteger.One, null)
{
}
public ECPrivateKeyStructure(
BigInteger key)
{
this.seq = new DerSequence(
new DerInteger(1),
new DerOctetString(key.ToByteArrayUnsigned()));
}
/**
* generate a signature for the given message using the key we were
* initialised with. For conventional Gost3410 the message should be a Gost3411
* hash of the message of interest.
*
* @param message the message that will be verified later.
*/
public BigInteger[] GenerateSignature(
byte[] message)
{
byte[] mRev = new byte[message.Length]; // conversion is little-endian
for (int i = 0; i != mRev.Length; i++)
{
mRev[i] = message[mRev.Length - 1 - i];
}
BigInteger m = new BigInteger(1, mRev);
Gost3410Parameters parameters = key.Parameters;
BigInteger k;
do
{
k = new BigInteger(parameters.Q.BitLength, random);
}
while (k.CompareTo(parameters.Q) >= 0);
BigInteger r = parameters.A.ModPow(k, parameters.P).Mod(parameters.Q);
BigInteger s = k.Multiply(m).
Add(((Gost3410PrivateKeyParameters)key).X.Multiply(r)).
Mod(parameters.Q);
return new BigInteger[]{ r, s };
}
public TimeStampRequest Generate(
string digestAlgorithmOid,
byte[] digest,
BigInteger nonce)
{
if (digestAlgorithmOid == null)
{
throw new ArgumentException("No digest algorithm specified");
}
DerObjectIdentifier digestAlgOid = new DerObjectIdentifier(digestAlgorithmOid);
AlgorithmIdentifier algID = new AlgorithmIdentifier(digestAlgOid, DerNull.Instance);
MessageImprint messageImprint = new MessageImprint(algID, digest);
X509Extensions ext = null;
if (extOrdering.Count != 0)
{
ext = new X509Extensions(extOrdering, extensions);
}
DerInteger derNonce = nonce == null
? null
: new DerInteger(nonce);
return new TimeStampRequest(
new TimeStampReq(messageImprint, reqPolicy, derNonce, certReq, ext));
}
public RsaPrivateCrtKeyParameters(
BigInteger modulus,
BigInteger publicExponent,
BigInteger privateExponent,
BigInteger p,
BigInteger q,
BigInteger dP,
BigInteger dQ,
BigInteger qInv)
: base(true, modulus, privateExponent)
{
ValidateValue(publicExponent, "publicExponent", "exponent");
ValidateValue(p, "p", "P value");
ValidateValue(q, "q", "Q value");
ValidateValue(dP, "dP", "DP value");
ValidateValue(dQ, "dQ", "DQ value");
ValidateValue(qInv, "qInv", "InverseQ value");
this.e = publicExponent;
this.p = p;
this.q = q;
this.dP = dP;
this.dQ = dQ;
this.qInv = qInv;
}
/**
* Return a random BigInteger not less than 'min' and not greater than 'max'
*
* @param min the least value that may be generated
* @param max the greatest value that may be generated
* @param random the source of randomness
* @return a random BigInteger value in the range [min,max]
*/
public static BigInteger CreateRandomInRange(
BigInteger min,
BigInteger max,
// TODO Should have been just Random class
SecureRandom random)
{
int cmp = min.CompareTo(max);
if (cmp >= 0)
{
if (cmp > 0)
throw new ArgumentException("'min' may not be greater than 'max'");
return min;
}
if (min.BitLength > max.BitLength / 2)
{
return CreateRandomInRange(BigInteger.Zero, max.Subtract(min), random).Add(min);
}
for (int i = 0; i < MaxIterations; ++i)
{
BigInteger x = new BigInteger(max.BitLength, random);
if (x.CompareTo(min) >= 0 && x.CompareTo(max) <= 0)
{
return x;
}
}
// fall back to a faster (restricted) method
return new BigInteger(max.Subtract(min).BitLength - 1, random).Add(min);
}
internal BigInteger CalculatePrivate(
BigInteger p,
SecureRandom random,
int limit)
{
//
// calculate the private key
//
BigInteger pSub2 = p.Subtract(BigInteger.Two);
BigInteger x;
if (limit == 0)
{
x = createInRange(pSub2, random);
}
else
{
do
{
// TODO Check this (should the generated numbers always be odd,
// and length 'limit'?)
x = new BigInteger(limit, 0, random);
}
while (x.SignValue == 0);
}
return x;
}
public ECDomainParameters(
ECCurve curve,
ECPoint g,
BigInteger n)
: this(curve, g, n, BigInteger.One)
{
}
public BigInteger ConvertInput(
byte[] inBuf,
int inOff,
int inLen)
{
int maxLength = (bitSize + 7) / 8;
if (inLen > maxLength)
throw new DataLengthException("input too large for RSA cipher.");
byte[] block;
if (inOff != 0 || inLen != inBuf.Length)
{
block = new byte[inLen];
Array.Copy(inBuf, inOff, block, 0, inLen);
}
else
{
block = inBuf;
}
BigInteger input = new BigInteger(1, block);
if (input.CompareTo(key.Modulus) >= 0)
throw new DataLengthException("input too large for RSA cipher.");
return input;
}
public void TestECNR239bitPrime()
{
BigInteger r = new BigInteger("308636143175167811492623515537541734843573549327605293463169625072911693");
BigInteger s = new BigInteger("852401710738814635664888632022555967400445256405412579597015412971797143");
byte[] kData = new BigInteger("700000017569056646655505781757157107570501575775705779575555657156756655").ToByteArrayUnsigned();
SecureRandom k = FixedSecureRandom.From(kData);
ECCurve curve = new FpCurve(
new BigInteger("883423532389192164791648750360308885314476597252960362792450860609699839"), // q
new BigInteger("7fffffffffffffffffffffff7fffffffffff8000000000007ffffffffffc", 16), // a
new BigInteger("6b016c3bdcf18941d0d654921475ca71a9db2fb27d1d37796185c2942c0a", 16)); // b
ECDomainParameters spec = new ECDomainParameters(
curve,
curve.DecodePoint(Hex.Decode("020ffa963cdca8816ccc33b8642bedf905c3d358573d3f27fbbd3b3cb9aaaf")), // G
new BigInteger("883423532389192164791648750360308884807550341691627752275345424702807307")); // n
ECPrivateKeyParameters priKey = new ECPrivateKeyParameters(
new BigInteger("876300101507107567501066130761671078357010671067781776716671676178726717"), // d
spec);
ECPublicKeyParameters pubKey = new ECPublicKeyParameters(
curve.DecodePoint(Hex.Decode("025b6dc53bc61a2548ffb0f671472de6c9521a9d2d2534e65abfcbd5fe0c70")), // Q
spec);
ISigner sgr = SignerUtilities.GetSigner("SHA1withECNR");
byte[] message = new byte[] { (byte)'a', (byte)'b', (byte)'c' };
checkSignature(239, priKey, pubKey, sgr, k, message, r, s);
}
/**
* which Generates the p and g values from the given parameters,
* returning the DHParameters object.
* <p>
* Note: can take a while...</p>
*/
public virtual DHParameters GenerateParameters()
{
//
// find a safe prime p where p = 2*q + 1, where p and q are prime.
//
BigInteger[] safePrimes = DHParametersHelper.GenerateSafePrimes(size, certainty, random);
BigInteger p = safePrimes[0];
BigInteger q = safePrimes[1];
BigInteger g;
int qLength = size - 1;
//
// calculate the generator g - the advantage of using the 2q+1
// approach is that we know the prime factorisation of (p - 1)...
//
do
{
g = new BigInteger(qLength, random);
}
while (g.ModPow(BigInteger.Two, p).Equals(BigInteger.One)
|| g.ModPow(q, p).Equals(BigInteger.One));
return new DHParameters(p, g, q, 2);
}
public RsaPublicKeyStructure(
BigInteger modulus,
BigInteger publicExponent)
{
this.modulus = modulus;
this.publicExponent = publicExponent;
}
public Gost3410Parameters(
BigInteger p,
BigInteger q,
BigInteger a)
: this(p, q, a, null)
{
}
/**
* Given the domain parameters this routine Generates an EC key
* pair in accordance with X9.62 section 5.2.1 pages 26, 27.
*/
public IAsymmetricCipherKeyPair GenerateKeyPair()
{
var n = _parameters.N;
IBigInteger d;
do
{
d = new BigInteger(n.BitLength, _random);
}
while (d.SignValue == 0 || (d.CompareTo(n) >= 0));
var isEcdh = _algorithm == "ECDH";
var q = _parameters.G.Multiply(d);
if (_publicKeyParamSet != null)
{
return new AsymmetricCipherKeyPair(
isEcdh
? new ECDHPublicKeyParameters(q, _publicKeyParamSet, _hashAlgorithm, _symmetricKeyAlgorithm)
: new ECPublicKeyParameters(_algorithm, q, _publicKeyParamSet),
new ECPrivateKeyParameters(_algorithm, d, _publicKeyParamSet));
}
return new AsymmetricCipherKeyPair(
isEcdh
? new ECDHPublicKeyParameters(q, _parameters, _hashAlgorithm, _symmetricKeyAlgorithm)
: new ECPublicKeyParameters(_algorithm, q, _parameters),
new ECPrivateKeyParameters(_algorithm, d, _parameters));
}
/**
* Initialises the client to begin new authentication attempt
* @param N The safe prime associated with the client's verifier
* @param g The group parameter associated with the client's verifier
* @param digest The digest algorithm associated with the client's verifier
* @param random For key generation
*/
public virtual void Init(BigInteger N, BigInteger g, IDigest digest, SecureRandom random)
{
this.N = N;
this.g = g;
this.digest = digest;
this.random = random;
}
public static BigInteger Base64StringToBigInteger(string str)
{
byte[] binModulus = Convert.FromBase64String(str);
BigInteger modulus = new BigInteger(1, binModulus);
return modulus;
}
public RsaSecretBcpgKey(
BigInteger d,
BigInteger p,
BigInteger q)
{
// PGP requires (p < q)
int cmp = p.CompareTo(q);
if (cmp >= 0)
{
if (cmp == 0)
throw new ArgumentException("p and q cannot be equal");
BigInteger tmp = p;
p = q;
q = tmp;
}
this.d = new MPInteger(d);
this.p = new MPInteger(p);
this.q = new MPInteger(q);
this.u = new MPInteger(p.ModInverse(q));
this.expP = d.Remainder(p.Subtract(BigInteger.One));
this.expQ = d.Remainder(q.Subtract(BigInteger.One));
this.crt = q.ModInverse(p);
}
public void TestECNR192bitPrime()
{
BigInteger r = new BigInteger("2474388605162950674935076940284692598330235697454145648371");
BigInteger s = new BigInteger("2997192822503471356158280167065034437828486078932532073836");
byte[] kData = new BigInteger("dcc5d1f1020906df2782360d36b2de7a17ece37d503784af", 16).ToByteArrayUnsigned();
SecureRandom k = FixedSecureRandom.From(kData);
FpCurve curve = new FpCurve(
new BigInteger("6277101735386680763835789423207666416083908700390324961279"), // q (or p)
new BigInteger("FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEFFFFFFFFFFFFFFFC", 16), // a
new BigInteger("64210519E59C80E70FA7E9AB72243049FEB8DEECC146B9B1", 16)); // b
ECDomainParameters spec = new ECDomainParameters(
curve,
curve.DecodePoint(Hex.Decode("03188DA80EB03090F67CBF20EB43A18800F4FF0AFD82FF1012")), // G
new BigInteger("6277101735386680763835789423176059013767194773182842284081")); // n
ECPrivateKeyParameters priKey = new ECPrivateKeyParameters(
new BigInteger("651056770906015076056810763456358567190100156695615665659"), // d
spec);
ECPublicKeyParameters pubKey = new ECPublicKeyParameters(
curve.DecodePoint(Hex.Decode("0262B12D60690CDCF330BABAB6E69763B471F994DD702D16A5")), // Q
spec);
ISigner sgr = SignerUtilities.GetSigner("SHA1withECNR");
byte[] message = new byte[] { (byte)'a', (byte)'b', (byte)'c' };
checkSignature(192, priKey, pubKey, sgr, k, message, r, s);
}
private RsaKeyParameters MakeKey(String modulusHexString, String exponentHexString, bool isPrivateKey)
{
var modulus = new Org.BouncyCastle.Math.BigInteger(modulusHexString, 16);
var exponent = new Org.BouncyCastle.Math.BigInteger(exponentHexString, 16);
return(new RsaKeyParameters(isPrivateKey, modulus, exponent));
}
static TspTestUtil()
{
rand = new SecureRandom();
kpg = GeneratorUtilities.GetKeyPairGenerator("RSA");
kpg.Init(new RsaKeyGenerationParameters(
BigInteger.ValueOf(0x10001), rand, 1024, 25));
desede128kg = GeneratorUtilities.GetKeyGenerator("DESEDE");
desede128kg.Init(new KeyGenerationParameters(rand, 112));
desede192kg = GeneratorUtilities.GetKeyGenerator("DESEDE");
desede192kg.Init(new KeyGenerationParameters(rand, 168));
rc240kg = GeneratorUtilities.GetKeyGenerator("RC2");
rc240kg.Init(new KeyGenerationParameters(rand, 40));
rc264kg = GeneratorUtilities.GetKeyGenerator("RC2");
rc264kg.Init(new KeyGenerationParameters(rand, 64));
rc2128kg = GeneratorUtilities.GetKeyGenerator("RC2");
rc2128kg.Init(new KeyGenerationParameters(rand, 128));
serialNumber = BigInteger.One;
}
public static string ByteArrayToBase58(byte[] ba)
{
Org.BouncyCastle.Math.BigInteger addrremain = new Org.BouncyCastle.Math.BigInteger(1, ba);
Org.BouncyCastle.Math.BigInteger big0 = new Org.BouncyCastle.Math.BigInteger("0");
Org.BouncyCastle.Math.BigInteger big58 = new Org.BouncyCastle.Math.BigInteger("58");
string b58 = "123456789ABCDEFGHJKLMNPQRSTUVWXYZabcdefghijkmnopqrstuvwxyz";
string rv = "";
while (addrremain.CompareTo(big0) > 0)
{
int d = Convert.ToInt32(addrremain.Mod(big58).ToString());
addrremain = addrremain.Divide(big58);
rv = b58.Substring(d, 1) + rv;
}
// handle leading zeroes
foreach (byte b in ba)
{
if (b != 0)
{
break;
}
rv = "1" + rv;
}
return(rv);
}
/// <summary>
/// Creates ECDSA from imported data
/// </summary>
/// <param name="type">0 or 1 (1 faster)</param>
/// <param name="forSign">if created for signing, otherwise for verifying</param>
/// <param name="import">Imporeted public or private key</param>
public ECDSAWrapper(int type, bool forSign, byte[] import)
{
this.initCurveandParams(type);
if (forSign)
{
try
{
//import - D (BigInteger)
SecureRandom random = new SecureRandom();
BigInteger Drec = new BigInteger(import);
ECPrivateKeyParameters ecPrivImported = new ECPrivateKeyParameters(Drec, this.parameters);
ParametersWithRandom ecPrivImportedpwr = new ParametersWithRandom(ecPrivImported, random);
this.ecdsa.Init(true, ecPrivImportedpwr);
}
catch (Exception ex)
{
throw new Exception("Error while creating ECDSAWrapper from import for signing", ex);
}
}
else
{
try
{
//import - Q (ECPoint)
ECPoint Qrec = this.ecCurve.DecodePoint(import);
ECPublicKeyParameters recPub = new ECPublicKeyParameters(Qrec, this.parameters);
this.ecdsa.Init(false, recPub);
}
catch (Exception ex)
{
throw new Exception("Error while creating ECDSAWrapperfom import for verifying", ex);
}
}
}
public DsaParameters(
BigInteger p,
BigInteger q,
BigInteger g)
: this(p, q, g, null)
{
}
public IssuerAndSerialNumber(
X509Name name,
BigInteger serialNumber)
{
this.name = name;
this.serialNumber = new DerInteger(serialNumber);
}
/**
* Reason being as indicated by ReasonFlags, i.e. ReasonFlags.keyCompromise
* or 0 if ReasonFlags are not to be used
**/
public void AddCrlEntry(
BigInteger userCertificate,
DateTime revocationDate,
int reason)
{
tbsGen.AddCrlEntry(new DerInteger(userCertificate), new Time(revocationDate), reason);
}
public BigInteger Encrypt(BigInteger m)
{
/* e = new BigInteger("3");
* m = new BigInteger("111111");
* n = new BigInteger("9173503");*/
Console.WriteLine("Encrypt message: " + m);
return(m.ModPow(e, n));
}
private static ECPoint DecompressKey(Org.BouncyCastle.Math.BigInteger xBN, bool yBit)
{
var curve = ECKey.CreateCurve().Curve;
byte[] compEnc = X9IntegerConverter.IntegerToBytes(xBN, 1 + X9IntegerConverter.GetByteLength(curve));
compEnc[0] = (byte)(yBit ? 0x03 : 0x02);
return(curve.DecodePoint(compEnc));
}
static FixedSecureRandom()
{
M.BigInteger check1 = new M.BigInteger(128, new RandomChecker());
M.BigInteger check2 = new M.BigInteger(120, new RandomChecker());
isAndroidStyle = check1.Equals(ANDROID);
isRegularStyle = check1.Equals(REGULAR);
isClasspathStyle = check2.Equals(CLASSPATH);
}
public static string GetPublicKeyFromPrivateKeyEx(string privateKey)
{
var curve = SecNamedCurves.GetByName("secp256k1");
var domain = new ECDomainParameters(curve.Curve, curve.G, curve.N, curve.H);
var d = new Org.BouncyCastle.Math.BigInteger(privateKey);
var q = domain.G.Multiply(d);
var publicKey = new ECPublicKeyParameters(q, domain);
return(Convert.ToBase64String(publicKey.Q.GetEncoded()));
}
/// <summary>
/// Returns error message in a string if private key is not within the valid range (2 ... N-1)
/// </summary>
private string validateRange()
{
Org.BouncyCastle.Math.BigInteger Db = new Org.BouncyCastle.Math.BigInteger(1, _privKey);
BigInteger N = Org.BouncyCastle.Asn1.Sec.SecNamedCurves.GetByName("secp256k1").N;
if (Db == BigInteger.Zero || Db.CompareTo(N) >= 0)
{
return("Not a valid private key");
}
return(null);
}
public String decipher(List <Org.BouncyCastle.Math.BigInteger> cipher, MHPrivateKey key)
{
String decrypted = "";
Org.BouncyCastle.Math.BigInteger temp = Org.BouncyCastle.Math.BigInteger.ValueOf(0);
int tmp = 0;
Org.BouncyCastle.Math.BigInteger bits = Org.BouncyCastle.Math.BigInteger.ValueOf(0);
for (int i = 0; i < cipher.Count; i++)
{
temp = cipher.ElementAt(i);
int bitlen = temp.BitLength;
int ff = 0;
while (bitlen < (int)Math.Pow(2, ff))
{
ff++;
}
if (ff > bitlen)
{
bitlen = ff;
}
for (int j = 0; j < bitlen; j++)
{
if (temp.Mod(Org.BouncyCastle.Math.BigInteger.ValueOf(2)).CompareTo(Org.BouncyCastle.Math.BigInteger.ValueOf(1)) == 0)
{
bits = bits.Add(key.w1.Multiply(Org.BouncyCastle.Math.BigInteger.ValueOf((long)Math.Pow(2, j))));
}
temp = temp.ShiftRight(1);
}
bits = bits.Mod(key.n);
List <Org.BouncyCastle.Math.BigInteger> list = key.a;
Org.BouncyCastle.Math.BigInteger temper;
int k = key.a.Count - 1;
while (k >= 0)
{
temper = list.ElementAt(k);
if (bits.CompareTo(temper) > -1)
{
tmp += (int)Math.Pow(2, k);
bits = bits.Subtract(temper);
}
k--;
}
decrypted += (binaryToChar(Convert.ToString(tmp, 2))).ToString();
bits = Org.BouncyCastle.Math.BigInteger.ValueOf(0);
tmp = 0;
}
return(decrypted);
}
public Org.BouncyCastle.Math.BigInteger getGCD(Org.BouncyCastle.Math.BigInteger bd1, Org.BouncyCastle.Math.BigInteger bd2)
{
Org.BouncyCastle.Math.BigInteger bigger = (bd1.CompareTo(bd2) > 0) ? bd1 : bd2;
Org.BouncyCastle.Math.BigInteger smaller = (bd1.CompareTo(bd2) < 0) ? bd1 : bd2;
Org.BouncyCastle.Math.BigInteger gcd = smaller;
while (!Org.BouncyCastle.Math.BigInteger.Zero.Equals(smaller))
{
gcd = smaller;
smaller = bigger.Mod(smaller);
bigger = gcd;
}
return(gcd);
}
public static BigInteger DefaultServerOnce()
{
var bytes = new List <byte>();
var part1 = BitConverter.GetBytes(0x56781234abcdef00);
var part2 = BitConverter.GetBytes(0xbcdefabcd0011224);
bytes.AddRange(part2);
bytes.AddRange(part1);
var big = new Org.BouncyCastle.Math.BigInteger(bytes.ToArray());
return(big);
//var bytes = new List<byte>();
//var part1 = BitConverter.GetBytes(0x56781234abcdef00);
//var part2 = BitConverter.GetBytes(0xbcdefabcd0011224);
//bytes.AddRange(BitConverter.GetBytes(0x56781234abcdef00));
//bytes.AddRange(BitConverter.GetBytes(0xbcdefabcd0011224));
//return new Org.BouncyCastle.Math.BigInteger(bytes.ToArray());
}
private void GenerateElGamal(Stream outSecret, Stream outPublic)
{
// Prepare a strong Secure Random with seed
SecureRandom secureRandom = PgpEncryptionUtil.GetSecureRandom();
IAsymmetricCipherKeyPairGenerator dsaKpg = GeneratorUtilities.GetKeyPairGenerator("DSA");
DsaParametersGenerator pGen = new DsaParametersGenerator();
pGen.Init((int)PublicKeyLength.BITS_1024, 80, new SecureRandom()); // DSA is 1024 even for long 2048+ ElGamal keys
DsaParameters dsaParams = pGen.GenerateParameters();
DsaKeyGenerationParameters kgp = new DsaKeyGenerationParameters(secureRandom, dsaParams);
dsaKpg.Init(kgp);
//
// this takes a while as the key generator has to Generate some DSA parameters
// before it Generates the key.
//
AsymmetricCipherKeyPair dsaKp = dsaKpg.GenerateKeyPair();
IAsymmetricCipherKeyPairGenerator elgKpg = GeneratorUtilities.GetKeyPairGenerator("ELGAMAL");
Group elgamalGroup = Precomputed.GetElGamalGroup((int)this.publicKeyLength);
if (elgamalGroup == null)
{
throw new ArgumentException("ElGamal Group not found for key length: " + this.publicKeyLength);
}
Org.BouncyCastle.Math.BigInteger p = elgamalGroup.GetP();
Org.BouncyCastle.Math.BigInteger g = elgamalGroup.GetG();
secureRandom = PgpEncryptionUtil.GetSecureRandom();
ElGamalParameters elParams = new ElGamalParameters(p, g);
ElGamalKeyGenerationParameters elKgp = new ElGamalKeyGenerationParameters(secureRandom, elParams);
elgKpg.Init(elKgp);
//
// this is quicker because we are using preGenerated parameters.
//
AsymmetricCipherKeyPair elgKp = elgKpg.GenerateKeyPair();
DsaElGamalKeyGeneratorUtil.ExportKeyPair(outSecret, outPublic, dsaKp, elgKp, identity, passphrase, true);
}
public string GetSign(byte[] msg)
{
//Org.BouncyCastle.Math.BigInteger d = new Org.BouncyCastle.Math.BigInteger(Convert.FromBase64String(privKey));
byte[] prvB = StringToByteArray(prv);
byte[] pubB = StringToByteArray(pub);
//byte[] prvB = StringToByteArray(prvTmp);
//byte[] pubB = StringToByteArray(pubTmp);
Org.BouncyCastle.Math.BigInteger sk = new Org.BouncyCastle.Math.BigInteger(+1, prvB);
Org.BouncyCastle.Math.EC.ECPoint q = domain.G.Multiply(sk);
byte[] pubKeyX = q.Normalize().AffineXCoord.GetEncoded();
byte[] pubKeyY = q.Normalize().AffineYCoord.GetEncoded();
BigInteger k = GenerateRandom();
//BigInteger k = new BigInteger(+1,StringToByteArray("015B931D9C7BF3A7A70E57868BF29712377E74355FC59032CD7547C80E179010"));
//Debug.Log("kv:" + BitConverter.ToString(kv.ToByteArray()).Replace("-", ""));
Debug.Log("K:" + BitConverter.ToString(k.ToByteArray()).Replace("-", ""));
ECPoint Q = domain.G.Multiply(k);
Org.BouncyCastle.Crypto.Digests.Sha256Digest digester = new Org.BouncyCastle.Crypto.Digests.Sha256Digest();
byte[] h = new byte[digester.GetDigestSize()];
digester.BlockUpdate(Q.GetEncoded(true), 0, Q.GetEncoded(true).Length);
digester.BlockUpdate(pubB, 0, pubB.Length);
digester.BlockUpdate(msg, 0, msg.Length);
digester.DoFinal(h, 0);
Org.BouncyCastle.Math.BigInteger r = new Org.BouncyCastle.Math.BigInteger(+1, h);
BigInteger s = r.Multiply(sk);
s = k.Subtract(s);
s = s.Mod(domain.n);
string rt = BitConverter.ToString(r.ToByteArray()).Replace("-", "");
if (rt.Length > 32)
{
rt = rt.Remove(0, 2);
}
string st = BitConverter.ToString(s.ToByteArray()).Replace("-", "");
return(rt + st);
}
private static ECDsa LoadPrivateKey(byte[] key)
{
var privKeyInt = new Org.BouncyCastle.Math.BigInteger(+1, key);
var parameters = SecNamedCurves.GetByName("secp256r1");
var ecPoint = parameters.G.Multiply(privKeyInt);
var privKeyX = ecPoint.Normalize().XCoord.ToBigInteger().ToByteArrayUnsigned();
var privKeyY = ecPoint.Normalize().YCoord.ToBigInteger().ToByteArrayUnsigned();
return(ECDsa.Create(new ECParameters
{
Curve = ECCurve.NamedCurves.nistP256,
D = privKeyInt.ToByteArrayUnsigned(),
Q = new ECPoint
{
X = privKeyX,
Y = privKeyY
}
}));
}
public string GetPublicKey(byte[] privKey)
{
var privHex = BitConverter.ToString(privKey).Replace("-", "");
privHex = privHex.Substring(104, (privHex.Length - 104));
privKey = StringToByteArray(privHex);
Org.BouncyCastle.Math.BigInteger d = new Org.BouncyCastle.Math.BigInteger(privKey);
this.privateKeyParameters = new Org.BouncyCastle.Crypto.Parameters.ECPrivateKeyParameters(d, domain);
Org.BouncyCastle.Math.EC.ECPoint q = domain.G.Multiply(d);
this.pubKeyParameters = new Org.BouncyCastle.Crypto.Parameters.ECPublicKeyParameters(q, domain);
//strip first byte
var pubBytes = this.pubKeyParameters.Q.GetEncoded();
var pubHex = BitConverter.ToString(pubBytes).Replace("-", "");
var strippedPubBytes = StringToByteArray(pubHex.Substring(2, (pubHex.Length - 2)));
return("MFYwEAYHKoZIzj0CAQYFK4EEAAoDQgAE" + Convert.ToBase64String(strippedPubBytes));
}
public MHKey()
{
generator gen = new generator(8);
Org.BouncyCastle.Math.BigInteger w = gen.w;
e = new List <Org.BouncyCastle.Math.BigInteger>();
for (int i = 0; i < gen.a.Count; i++)
{
e.Add((w.Multiply(gen.a.ElementAt(i))).Mod(gen.n)); // w*a Mod n ..
}
Org.BouncyCastle.Math.BigInteger w1 = Org.BouncyCastle.Math.BigInteger.ValueOf(1);
Org.BouncyCastle.Math.BigInteger one = Org.BouncyCastle.Math.BigInteger.ValueOf(2);
while (one.IntValue != 1)
{
w1 = w1.Add(Org.BouncyCastle.Math.BigInteger.ValueOf(1)).Mod(gen.n);
one = w.Multiply(w1).Mod(gen.n);
}
privateKey = new MHPrivateKey(gen.a, w.ModInverse(gen.n), gen.n);
}
public generator(int k)
{
a = new List <Org.BouncyCastle.Math.BigInteger>();
Random rnd = new Random();
BigInteger tmp;
BigInteger sum;
sum = BigInteger.ValueOf(0);
for (int i = 0; i < k; i++)
{
tmp = BigInteger.ValueOf((long)(Math.Pow(2, k + i)));
a.Add(tmp);
sum = sum.Add(tmp);
}
n = sum.Add(BigInteger.ValueOf(1));
w = BigInteger.ValueOf(467);
while (this.getGCD(n, w).CompareTo(BigInteger.ValueOf(1)) != 0)
{
w.Add(BigInteger.ValueOf(1));
}
}
public static string ConvertPrivateToPublic(this string privateHex)
{
byte[] hex = ValidateAndGetHexPrivateKey(privateHex, 0x00);
if (hex == null)
{
throw new Exception("Could not convert private key to public key. Bad private key.");
}
var ps = Org.BouncyCastle.Asn1.Sec.SecNamedCurves.GetByName("secp256k1");
Org.BouncyCastle.Math.BigInteger Db = new Org.BouncyCastle.Math.BigInteger(1, hex.Skip(1).ToArray());
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;
return(ByteArrayToString(pubaddr));
}
static void Main(string[] args)
{
Console.WriteLine("Enter bits length: ");
int bit_len = int.Parse(Console.ReadLine());
RSA rsa = new RSA(bit_len);
Console.WriteLine("Enter string:");
char[] array = Console.ReadLine().ToCharArray();
BigInteger [] enStr = new BigInteger[array.Length];
for (int i = 0; i < array.Length; ++i)
{
enStr[i] = rsa.Encrypt(new BigInteger(Convert.ToString((int)array[i])));
}
Console.WriteLine("Encrypted string: ");
for (int i = 0; i < array.Length; ++i)
{
Console.Write(enStr[i].ToString());
}
char[] decArray = new char[array.Length];
Console.WriteLine(" ");
for (int i = 0; i < array.Length; ++i)
{
String decStr = rsa.Decrypt(enStr[i]).ToString();
Console.WriteLine(decStr);
decArray[i] = (char)int.Parse(decStr);
}
Console.WriteLine("\nDecrypt string: ");
for (int i = 0; i < decArray.Length; ++i)
{
Console.Write(decArray[i]);
}
}
//Following code from https://bitcointalk.org/index.php?topic=25141.0
public static byte[] Base58ToByteArray(string base58)
{
Org.BouncyCastle.Math.BigInteger bi2 = new Org.BouncyCastle.Math.BigInteger("0");
string b58 = "123456789ABCDEFGHJKLMNPQRSTUVWXYZabcdefghijkmnopqrstuvwxyz";
bool IgnoreChecksum = false;
foreach (char c in base58)
{
if (b58.IndexOf(c) != -1)
{
bi2 = bi2.Multiply(new Org.BouncyCastle.Math.BigInteger("58"));
bi2 = bi2.Add(new Org.BouncyCastle.Math.BigInteger(b58.IndexOf(c).ToString()));
}
else if (c == '?')
{
IgnoreChecksum = true;
}
else
{
return(null);
}
}
byte[] bb = bi2.ToByteArrayUnsigned();
// interpret leading '1's as leading zero bytes
foreach (char c in base58)
{
if (c != '1')
{
break;
}
byte[] bbb = new byte[bb.Length + 1];
Array.Copy(bb, 0, bbb, 1, bb.Length);
bb = bbb;
}
if (bb.Length < 4)
{
return(null);
}
if (IgnoreChecksum == false)
{
SHA256CryptoServiceProvider sha256 = new SHA256CryptoServiceProvider();
byte[] checksum = sha256.ComputeHash(bb, 0, bb.Length - 4);
checksum = sha256.ComputeHash(checksum);
for (int i = 0; i < 4; i++)
{
if (checksum[i] != bb[bb.Length - 4 + i])
{
return(null);
}
}
}
byte[] rv = new byte[bb.Length - 4];
Array.Copy(bb, 0, rv, 0, bb.Length - 4);
return(rv);
}
public void swap(int n, int m)
{
Org.BouncyCastle.Math.BigInteger tmp = (Org.BouncyCastle.Math.BigInteger)e.ElementAt(m);
e.Insert(m, e.ElementAt(n));
e.Insert(n, tmp);
}
public System.Numerics.BigInteger[] Merge(Part[][] parts, int threshold)
{
Org.BouncyCastle.Math.BigInteger p1 = new Org.BouncyCastle.Math.BigInteger(p.ToString());
Console.WriteLine("p1" + p1.ToString());
int secretSize = parts[0].Length;
Console.WriteLine("secretsize" + secretSize);
System.Numerics.BigInteger[] results = new System.Numerics.BigInteger[secretSize];
string[] secret = new string[secretSize];
byte[] ba;
string str;
int count = 0;
// loop through each secret partition
for (int i = 0; i < secretSize; i++)
{
Sum = System.Numerics.BigInteger.Zero;
//doing lagrange interpolation
for (int j = 0; j < threshold; j++)
{
mult = System.Numerics.BigInteger.One;
for (int k = 0; k < threshold; k++)
{
if (j != k)
{
System.Numerics.BigInteger numerator = parts[k][i].GetX();
System.Numerics.BigInteger denominator = System.Numerics.BigInteger.Subtract(numerator, parts[j][i].GetX());
// take mod of negative number
while (System.Numerics.BigInteger.Compare(denominator, System.Numerics.BigInteger.Zero) < 0)
{
denominator = System.Numerics.BigInteger.Add(denominator, p);
}
//convert to bouncycastle biginteger to calculate modInverse
Org.BouncyCastle.Math.BigInteger denominator1 = new Org.BouncyCastle.Math.BigInteger(denominator.ToString());
Org.BouncyCastle.Math.BigInteger invDenominator1 = denominator1.ModInverse(p1);
System.Numerics.BigInteger invDenominator = System.Numerics.BigInteger.Parse(invDenominator1.ToString());
mult = System.Numerics.BigInteger.Multiply(mult, System.Numerics.BigInteger.Multiply(numerator, invDenominator));
mult = System.Numerics.BigInteger.Remainder(mult, p);
}
}
mult = System.Numerics.BigInteger.Multiply(mult, parts[j][i].GetY());
mult = System.Numerics.BigInteger.Remainder(mult, p);
Sum = System.Numerics.BigInteger.Add(Sum, mult);
Sum = System.Numerics.BigInteger.Remainder(Sum, p);
}
results[i] = Sum;
}
foreach (System.Numerics.BigInteger r in results)
{
//Console.WriteLine(r);
//System.Numerics.BigInteger.TryParse
ba = r.ToByteArray();
str = Encoding.UTF8.GetString(ba);
//Console.WriteLine(str);
secret[count++] = str;
}
str = string.Join("", secret);
str.Replace("\n", "");
return(results);
}
public ECDSASignature(Org.BouncyCastle.Math.BigInteger r, Org.BouncyCastle.Math.BigInteger s)
{
R = r;
S = s;
}
public BigInteger Decrypt(BigInteger c)
{
/* d = new BigInteger("6111579");*/
return(c.ModPow(d, n));
}
public static byte[] FromBigNum(Org.BouncyCastle.Math.BigInteger bi)
{
byte[] rgbT = bi.ToByteArrayUnsigned();
return(rgbT);
}
public static ECKey RecoverFromSignature(int recId, ECDSASignature sig, uint256 message, bool compressed)
{
if (recId < 0)
{
throw new ArgumentException("recId should be positive");
}
if (sig.R.SignValue < 0)
{
throw new ArgumentException("r should be positive");
}
if (sig.S.SignValue < 0)
{
throw new ArgumentException("s should be positive");
}
if (message == null)
{
throw new ArgumentNullException("message");
}
var curve = ECKey.CreateCurve();
// 1.0 For j from 0 to h (h == recId here and the loop is outside this function)
// 1.1 Let x = r + jn
var n = curve.N;
var i = Org.BouncyCastle.Math.BigInteger.ValueOf((long)recId / 2);
var x = sig.R.Add(i.Multiply(n));
// 1.2. Convert the integer x to an octet string X of length mlen using the conversion routine
// specified in Section 2.3.7, where mlen = ⌈(log2 p)/8⌉ or mlen = ⌈m/8⌉.
// 1.3. Convert the octet string (16 set binary digits)||X to an elliptic curve point R using the
// conversion routine specified in Section 2.3.4. If this conversion routine outputs “invalid”, then
// do another iteration of Step 1.
//
// More concisely, what these points mean is to use X as a compressed public key.
var prime = ((FpCurve)curve.Curve).Q;
if (x.CompareTo(prime) >= 0)
{
return(null);
}
// Compressed keys require you to know an extra bit of data about the y-coord as there are two possibilities.
// So it's encoded in the recId.
ECPoint R = DecompressKey(x, (recId & 1) == 1);
// 1.4. If nR != point at infinity, then do another iteration of Step 1 (callers responsibility).
if (!R.Multiply(n).IsInfinity)
{
return(null);
}
// 1.5. Compute e from M using Steps 2 and 3 of ECDSA signature verification.
var e = new Org.BouncyCastle.Math.BigInteger(1, message.ToBytes());
// 1.6. For k from 1 to 2 do the following. (loop is outside this function via iterating recId)
// 1.6.1. Compute a candidate public key as:
// Q = mi(r) * (sR - eG)
//
// Where mi(x) is the modular multiplicative inverse. We transform this into the following:
// Q = (mi(r) * s ** R) + (mi(r) * -e ** G)
// Where -e is the modular additive inverse of e, that is z such that z + e = 0 (mod n). In the above equation
// ** is point multiplication and + is point addition (the EC group operator).
//
// We can find the additive inverse by subtracting e from zero then taking the mod. For example the additive
// inverse of 3 modulo 11 is 8 because 3 + 8 mod 11 = 0, and -3 mod 11 = 8.
var eInv = Org.BouncyCastle.Math.BigInteger.Zero.Subtract(e).Mod(n);
var rInv = sig.R.ModInverse(n);
var srInv = rInv.Multiply(sig.S).Mod(n);
var eInvrInv = rInv.Multiply(eInv).Mod(n);
var q = (FpPoint)ECAlgorithms.SumOfTwoMultiplies(curve.G, eInvrInv, R, srInv);
if (compressed)
{
q = new FpPoint(curve.Curve, q.X, q.Y, true);
}
return(new ECKey(q.GetEncoded(), false));
}
