/// <summary> /// Шифрует общий секретный ключ. /// </summary> /// <param name="keyExchangeAlgorithm">Алгоритм шифрации общего секретного ключа.</param> /// <exception cref="ArgumentNullException"></exception> public GostKeyExchange CreateKeyExchangeInfo(SymmetricAlgorithm keyExchangeAlgorithm) { if (keyExchangeAlgorithm == null) { throw ExceptionUtility.ArgumentNull("keyExchangeAlgorithm"); } var keyExchange = new GostKeyExchange(); var keyExchangeParameters = _publicKey.ExportParameters(false); using (var keyExchangeAsym = new Gost3410EphemeralAsymmetricAlgorithm(keyExchangeParameters)) { byte[] encodedKeyExchangeInfo; using (var keyExchangeAlg = keyExchangeAsym.CreateKeyExchange(keyExchangeParameters)) { encodedKeyExchangeInfo = keyExchangeAlg.EncodeKeyExchange(keyExchangeAlgorithm, GostKeyExchangeExportMethod.CryptoProKeyExport); } var keyExchangeInfo = new GostKeyExchangeInfo(); keyExchangeInfo.Decode(encodedKeyExchangeInfo); keyExchange.SessionEncryptedKey = keyExchangeInfo; keyExchange.TransportParameters = keyExchangeAsym.ExportParameters(false); } return(keyExchange); }
/// <summary> /// Шифрует общий секретный ключ. /// </summary> /// <param name="keyExchangeAlgorithm">Алгоритм шифрации общего секретного ключа.</param> /// <exception cref="ArgumentNullException"></exception> public GostKeyExchange CreateKeyExchangeInfo(SymmetricAlgorithm keyExchangeAlgorithm) { if (keyExchangeAlgorithm == null) { throw ExceptionUtility.ArgumentNull("keyExchangeAlgorithm"); } var keyExchange = new GostKeyExchange(); var keyExchangeParameters = _publicKey.ExportParameters(false); var digestoid = keyExchangeParameters.DigestParamSet; Gost3410 keyExchangeAsym; if (digestoid == Constants.OID_GR3411_12_256) { keyExchangeAsym = new Gost3410_2012_256EphemeralAsymmetricAlgorithm(keyExchangeParameters); } else if (digestoid == Constants.OID_GR3411_12_512) { keyExchangeAsym = new Gost3410_2012_512EphemeralAsymmetricAlgorithm(keyExchangeParameters); } else { keyExchangeAsym = new Gost3410EphemeralAsymmetricAlgorithm(keyExchangeParameters); } byte[] encodedKeyExchangeInfo; using (var keyExchangeAlg = keyExchangeAsym.CreateKeyExchange(keyExchangeParameters)) { encodedKeyExchangeInfo = keyExchangeAlg.EncodeKeyExchange(keyExchangeAlgorithm, GostKeyExchangeExportMethod.CryptoProKeyExport); } var keyExchangeInfo = new GostKeyExchangeInfo(); keyExchangeInfo.Decode(encodedKeyExchangeInfo); keyExchange.SessionEncryptedKey = keyExchangeInfo; keyExchange.TransportParameters = keyExchangeAsym.ExportParameters(false); keyExchangeAsym.Dispose(); return(keyExchange); }
private SymmetricAlgorithm DecodeKeyExchangeInternal(byte[] encodedKeyExchangeData, int keyExchangeExportAlgId) { var keyExchangeInfo = new GostKeyExchangeInfo(); keyExchangeInfo.Decode(encodedKeyExchangeData); SafeKeyHandleImpl symKeyHandle; SafeKeyHandleImpl keyExchangeHandle = null; try { keyExchangeHandle = CryptoApiHelper.ImportAndMakeKeyExchange(_provHandle, _keyExchangeParameters, _keyHandle); CryptoApiHelper.SetKeyParameterInt32(keyExchangeHandle, Constants.KP_ALGID, keyExchangeExportAlgId); symKeyHandle = CryptoApiHelper.ImportKeyExchange(_provHandle, keyExchangeInfo, keyExchangeHandle); } finally { keyExchangeHandle.TryDispose(); } return(new Gost28147SymmetricAlgorithm(_provHandle, symKeyHandle)); }
public override SymmetricAlgorithm DecodePrivateKey(byte[] encodedKeyExchangeData, GostKeyExchangeExportMethod keyExchangeExportMethod) { if (encodedKeyExchangeData == null) { throw ExceptionUtility.ArgumentNull("encodedKeyExchangeData"); } int keyExchangeExportAlgId; if (keyExchangeExportMethod == GostKeyExchangeExportMethod.GostKeyExport) { keyExchangeExportAlgId = Constants.CALG_SIMPLE_EXPORT; } else if (keyExchangeExportMethod == GostKeyExchangeExportMethod.CryptoProKeyExport) { keyExchangeExportAlgId = Constants.CALG_PRO_EXPORT; } else { throw ExceptionUtility.ArgumentOutOfRange("keyExchangeExportMethod"); } var providerHandle = CryptoApiHelper.ProviderHandle; var keyExchangeInfo = new GostKeyExchangeInfo(); keyExchangeInfo.Decode(encodedKeyExchangeData); using (var keyHandle = CryptoApiHelper.DuplicateKey(InternalKeyHandle)) { CryptoApiHelper.SetKeyParameterInt32(keyHandle, Constants.KP_ALGID, keyExchangeExportAlgId); var keyExchangeHandle = CryptoApiHelper.ImportKeyExchange(providerHandle, keyExchangeInfo, keyHandle); return(new Gost28147SymmetricAlgorithm(providerHandle, keyExchangeHandle)); } }