Поддержка ГОСТ 34.12-2018 about gostcryptography HOT 7 CLOSED

    var publicKeyAlgorithm = (GostAsymmetricAlgorithm)certificate.GetPublicKeyAlgorithm();
    var sessionKey = new Gost_28147_89_SymmetricAlgorithm(publicKeyAlgorithm.ProviderType);
    
    elementEncryptedData.EncryptionMethod = new EncryptionMethod(sessionKey.AlgorithmName);
    
    var encryptedXml = new GostEncryptedXml();
    var xmlBytes = Encoding.UTF8.GetBytes(inputXmlDoc.OuterXml);
    var encryptedData = encryptedXml.EncryptData(xmlBytes, sessionKey);
    
    elementEncryptedData.CipherData.CipherValue = encryptedData;
    
    var encryptMethod = new EncryptionMethod(publicKeyAlgorithm.KeyExchangeAlgorithm);
    var encryptedSessionKeyData = GostEncryptedXml.EncryptKey(sessionKey, publicKeyAlgorithm);
    var encryptedSessionKey = new EncryptedKey
    {
        CipherData = new CipherData(encryptedSessionKeyData),
        EncryptionMethod = encryptMethod,
    };
    
    encryptedSessionKey.KeyInfo.AddClause(new KeyInfoX509Data(certificate));
    elementEncryptedData.KeyInfo.AddClause(new KeyInfoEncryptedKey(encryptedSessionKey));