// cms-сообщение для расшифрования
        final byte[] buffer = Array.readFile(input_file);

        //разбор CMS-сообщения
        Asn1BerDecodeBuffer dbuf = new Asn1BerDecodeBuffer(buffer);
        final ContentInfo all = new ContentInfo();
        all.decode(dbuf);
        dbuf.reset();
        final EnvelopedData cms = (EnvelopedData) all.content;

        KeyTransRecipientInfo keytrans = new KeyTransRecipientInfo();
        if (cms.recipientInfos.elements[0].getChoiceID() == RecipientInfo._KTRI) {
            keytrans
                    = (KeyTransRecipientInfo) (cms.recipientInfos.elements[0].getElement());
        }
        final Asn1BerEncodeBuffer ebuf = new Asn1BerEncodeBuffer();
        dbuf = new Asn1BerDecodeBuffer(keytrans.encryptedKey.value);

        final GostR3410_KeyTransport encrKey = new GostR3410_KeyTransport();
        encrKey.decode(dbuf);
        dbuf.reset();
        encrKey.sessionEncryptedKey.encode(ebuf);
        final byte[] wrapKey = ebuf.getMsgCopy();
        ebuf.reset();
        encrKey.transportParameters.ephemeralPublicKey.encode(ebuf);
        final byte[] encodedPub = ebuf.getMsgCopy();
        ebuf.reset();
        final byte[] sv = encrKey.transportParameters.ukm.value;
        final Gost28147_89_Parameters params
                = (Gost28147_89_Parameters) cms.encryptedContentInfo.contentEncryptionAlgorithm.parameters;
        final byte[] iv = params.iv.value;
        final OID cipherOID = new OID(params.encryptionParamSet.value);
        final byte[] text = cms.encryptedContentInfo.encryptedContent.value;

        //Загрузка хранилища
        final KeyStore hdImageStore = KeyStore.getInstance("HDImageStore");
        hdImageStore.load(null, null);

        //получатель - закрытый ключ
        final PrivateKey responderKey = (PrivateKey) hdImageStore.getKey(ALIAS, STORE_PASS);

        //отправитель - открытый ключ из cms
        final X509EncodedKeySpec pspec = new X509EncodedKeySpec(encodedPub);
        final KeyFactory kf = KeyFactory.getInstance(JCP.GOST_DH_NAME);
        final PublicKey senderPublic = kf.generatePublic(pspec);

        // выработка ключа согласования получателем
        final KeyAgreement responderKeyAgree
                = KeyAgreement.getInstance(JCP.GOST_DH_NAME);
        responderKeyAgree.init(responderKey, new IvParameterSpec(sv), null);
        responderKeyAgree.doPhase(senderPublic, true);
        final SecretKey responderSecret = responderKeyAgree
                .generateSecret("GOST28147");

        // Расшифрование симметричного ключа.
        final Cipher cipher = Cipher.getInstance(CIPHER_ALG);
        cipher.init(Cipher.UNWRAP_MODE, responderSecret, (SecureRandom) null);
        final SecretKey simmKey = (SecretKey) cipher
                .unwrap(wrapKey, null, Cipher.SECRET_KEY);

        // Расшифрование текста на симметричном ключе.
        final GostCipherSpec spec = new GostCipherSpec(iv, cipherOID);
        cipher.init(Cipher.DECRYPT_MODE, simmKey, spec, null);
        final byte[] result = cipher.doFinal(text, 0, text.length);

        // Выдергиваем именно текст
        final Asn1BerDecodeBuffer asnBuf = new Asn1BerDecodeBuffer(result);
        final ContentInfo cInfo = new ContentInfo();
        cInfo.decode(asnBuf);
        final SignedData cms2 = (SignedData) cInfo.content;
        if (cms2.encapContentInfo.eContent != null) {
            byte[] data = cms2.encapContentInfo.eContent.value;
            System.out.println("OK");
            Array.writeFile(output_file, data);
        }

cipher.init(Cipher.UNWRAP_MODE, responderSecret, (SecureRandom) null);

cInfo.decode(asnBuf);