/// <summary>constructor</summary>
/// <param name="func">キー派生関数（Bob側と合わせる）。</param>
/// <param name="hash">秘密協定の処理に使用するハッシュ アルゴリズム（Bob側と合わせる）</param>
/// <param name="hmacKey">HMACキー</param>
/// <param name="secretPrependOrLabel">SecretPrepend or Label</param>
/// <param name="secretAppendOrSeed">SecretAppend or Seed</param>
public EcdhCngBob(ECDiffieHellmanKeyDerivationFunction func, CngAlgorithm hash,
byte[] hmacKey, byte[] secretPrependOrLabel, byte[] secretAppendOrSeed)
{
ECDiffieHellmanCng ecdh = new ECDiffieHellmanCng();
this._asa = ecdh; // 保持
// Alice側と合わせる。
ecdh.KeyDerivationFunction = func;
if (func == ECDiffieHellmanKeyDerivationFunction.Hash)
{
ecdh.HashAlgorithm = hash;
ecdh.SecretPrepend = secretPrependOrLabel;
ecdh.SecretAppend = secretAppendOrSeed;
}
else if (func == ECDiffieHellmanKeyDerivationFunction.Hmac)
{
ecdh.HashAlgorithm = hash;
ecdh.HmacKey = hmacKey;
ecdh.SecretPrepend = secretPrependOrLabel;
ecdh.SecretAppend = secretAppendOrSeed;
}
else if (func == ECDiffieHellmanKeyDerivationFunction.Tls)
{
ecdh.Label = secretPrependOrLabel;
ecdh.Seed = secretAppendOrSeed;
}
// Aliceと鍵交換する交換鍵
this._exchangeKey = ecdh.PublicKey.ToByteArray();
}
public ECDiffieHellmanBc(Int32 keySize)
{
Org.BouncyCastle.Asn1.X9.X9ECParameters ecParams;
switch (keySize) {
case 256:
ecParams = Org.BouncyCastle.Asn1.Sec.SecNamedCurves.GetByName("secp256r1");
break;
case 384:
ecParams = Org.BouncyCastle.Asn1.Sec.SecNamedCurves.GetByName("secp384r1");
break;
case 521:
ecParams = Org.BouncyCastle.Asn1.Sec.SecNamedCurves.GetByName("secp521r1");
break;
default:
throw new ArgumentException("ECDiffieHellman key size " + keySize + " not supported");
}
_keySize = keySize;
_domainParameters = new ECDomainParameters(ecParams.Curve, ecParams.G, ecParams.N, ecParams.H, ecParams.GetSeed());
// Initialize key generation parameters with new SecureRandom
Org.BouncyCastle.Security.SecureRandom secureRandom = new Org.BouncyCastle.Security.SecureRandom();
ECKeyGenerationParameters keyGenParams = new ECKeyGenerationParameters(_domainParameters, secureRandom);
// Generate key pair from domain parameters
Org.BouncyCastle.Crypto.Generators.ECKeyPairGenerator generator = new Org.BouncyCastle.Crypto.Generators.ECKeyPairGenerator();
generator.Init(keyGenParams);
Org.BouncyCastle.Crypto.AsymmetricCipherKeyPair keyPair = generator.GenerateKeyPair();
// Save the private and public key parameters
_privateKeyParameters = (ECPrivateKeyParameters) keyPair.Private;
_publicKeyParameters = (ECPublicKeyParameters) keyPair.Public;
_kdf = ECDiffieHellmanKeyDerivationFunction.Hash;
_hashAlgorithm = CngAlgorithm.Sha256;
}
public ECDiffieHellmanBc(Int32 keySize)
{
Org.BouncyCastle.Asn1.X9.X9ECParameters ecParams;
switch (keySize)
{
case 256:
ecParams = Org.BouncyCastle.Asn1.Sec.SecNamedCurves.GetByName("secp256r1");
break;
case 384:
ecParams = Org.BouncyCastle.Asn1.Sec.SecNamedCurves.GetByName("secp384r1");
break;
case 521:
ecParams = Org.BouncyCastle.Asn1.Sec.SecNamedCurves.GetByName("secp521r1");
break;
default:
throw new ArgumentException("ECDiffieHellman key size " + keySize + " not supported");
}
_keySize = keySize;
_domainParameters = new ECDomainParameters(ecParams.Curve, ecParams.G, ecParams.N, ecParams.H, ecParams.GetSeed());
// Initialize key generation parameters with new SecureRandom
Org.BouncyCastle.Security.SecureRandom secureRandom = new Org.BouncyCastle.Security.SecureRandom();
ECKeyGenerationParameters keyGenParams = new ECKeyGenerationParameters(_domainParameters, secureRandom);
// Generate key pair from domain parameters
Org.BouncyCastle.Crypto.Generators.ECKeyPairGenerator generator = new Org.BouncyCastle.Crypto.Generators.ECKeyPairGenerator();
generator.Init(keyGenParams);
Org.BouncyCastle.Crypto.AsymmetricCipherKeyPair keyPair = generator.GenerateKeyPair();
// Save the private and public key parameters
_privateKeyParameters = (ECPrivateKeyParameters)keyPair.Private;
_publicKeyParameters = (ECPublicKeyParameters)keyPair.Public;
_kdf = ECDiffieHellmanKeyDerivationFunction.Hash;
_hashAlgorithm = CngAlgorithm.Sha256;
}
/// <summary>constructor</summary>
/// <param name="func">キー派生関数（Bob側と合わせる）。</param>
/// <param name="hash">秘密協定の処理に使用するハッシュ アルゴリズム（Bob側と合わせる）</param>
/// <param name="hmacKey">HMACキー</param>
public EcdhCngBob(ECDiffieHellmanKeyDerivationFunction func, CngAlgorithm hash, byte[] hmacKey)
: this(func, hash, hmacKey, null, null)
{
}
public ECDiffieHellmanAgreement(ECDiffieHellmanKeyDerivationFunction function, CngAlgorithm algorithm, CngKeyBlobFormat format)
{
this.keyDerivationFunction = function;
this.algorithm = algorithm;
this.keyBlobFormat = format;
}
/// <summary>constructor</summary>
/// <param name="func">キー派生関数（Bob側と合わせる）。</param>
/// <param name="hash">秘密協定の処理に使用するハッシュ アルゴリズム（Bob側と合わせる）</param>
public EcdhCngAlice(ECDiffieHellmanKeyDerivationFunction func, CngAlgorithm hash)
: this(func, hash, null, null, null)
{
}
