Exception was java.security.InvalidKeyException
at org.apache.xml.security.encryption.XMLCipher.decryptKey(XMLCipher.java:1422)
......
java.security.InvalidKeyException
	at ru.CryptoPro.Crypto.Cipher.TransportCipher.engineUnwrap(Unknown Source)
	at javax.crypto.Cipher.unwrap(Cipher.java:2466)
	at org.apache.xml.security.encryption.XMLCipher.decryptKey(XMLCipher.java:1420)
.............
Caused by: java.security.InvalidKeyException: Wrapped key is invalid
	at ru.CryptoPro.JCP.Key.SecretKeySpec.unwrap(Unknown Source)
	at ru.CryptoPro.Crypto.Cipher.GostCoreCipher.engineUnwrap(Unknown Source)
	at ru.CryptoPro.Crypto.Cipher.BaseGostCipher.engineUnwrap(Unknown Source)
	at javax.crypto.Cipher.unwrap(Cipher.java:2466)

            System.setProperty(Consts.PROPERTY_NAME,Consts.CONFIG);
            
            if(!XmlInit.isInitialized()) XmlInit.init();
            if(!org.apache.xml.security.Init.isInitialized()) org.apache.xml.security.Init.init();

            db=new DocumentBuilder();
            
            Document doc=db.createResponseDocument(value); //Здесь полное SOAP сообщение

            XMLCipher c1=XMLCipher.getInstance(Consts.URI_GOST_CIPHER);
            c1.init(XMLCipher.DECRYPT_MODE,null);

            Element encKeyElem=(Element)doc.getElementsByTagName("xenc:EncryptedKey").item(0);
            Element encryptedDataElement=(Element)doc.getElementsByTagNameNS(EncryptionConstants.EncryptionSpecNS,EncryptionConstants._TAG_ENCRYPTEDDATA).item(0);

            EncryptedKey encKey=c1.loadEncryptedKey(doc,encKeyElem);
            System.out.println("encKey.getCipherData().getCipherValue().getValue()="+encKey.getCipherData().getCipherValue().getValue());//Здесь есть значение ключа
            EncryptedData encData=c1.loadEncryptedData(doc,encryptedDataElement);
            System.out.println("encData.getCipherData().getCipherValue().getValue()="+encData.getCipherData().getCipherValue().getValue());//Здесь есть данные

            XMLCipher c2=XMLCipher.getInstance(Consts.URI_GOST_TRANSPORT);
            c2.init(XMLCipher.UNWRAP_MODE,jcpStoreApi.getPrivateKey());
 Key sk=c2.decryptKey(encKey,encData.getEncryptionMethod().getAlgorithm());//Здесь возникает ошибка!

            c1.init(XMLCipher.DECRYPT_MODE,sk);
 
            c1.doFinal(doc,encryptedDataElement);

SEQUENCE (2 elem)
  SEQUENCE (2 elem)
    OCTET STRING (32 byte) AEA894E0A34344C6B47D212B00681357C9F90E50520B6A8E6C7838772160249B
    OCTET STRING (4 byte) F5B3B5BF
  [0] (3 elem)
    OBJECT IDENTIFIER 1.2.643.2.2.31.1 cryptoProCipherA (CryptoPro params A (default, variant 'Verba-O') for GOST 28147-89)
    [0] (2 elem)
      SEQUENCE (2 elem)
        OBJECT IDENTIFIER 1.2.643.2.2.19 gostPublicKey (GOST R 34.10-2001 (ECC) public key)
        SEQUENCE (2 elem)
          OBJECT IDENTIFIER 1.2.643.2.2.36.0 cryptoProSignXA (CryptoPro ell.curve XA for GOST R 34.10-2001)
          OBJECT IDENTIFIER 1.2.643.2.2.30.1 cryptoProDigestA (CryptoPro digest params A (default, variant 'Verba-O') for GOST R 34.11-94)
      BIT STRING (1 elem)
        OCTET STRING (64 byte) 2139EDCD66F122FE9486DA2487C44574FC61743B6C69FD92DEA1C00DD216511CE6CC3B…
    OCTET STRING (8 byte) AEEF8E66D5255B35