JCPInit.initProviders(false);

        InputStream privateKeyInputStream = SignUtilTest.class.getClassLoader().getResourceAsStream("static/test.pfx");
        KeyStore keyStore = KeyStore.getInstance(JCSP.PFX_STORE_NAME, JCSP.PROVIDER_NAME);
        keyStore.load(privateKeyInputStream, KEY_PASSWORD.toCharArray());
        //Получение всех CN из контейнера
        keyStore.aliases().asIterator().forEachRemaining(System.out::println);

        // Получение приватного ключа
        log.info("Получение приватного ключа...");
        PrivateKey privateKey = (PrivateKey) keyStore.getKey(ALIAS, KEY_PASSWORD.toCharArray());
        log.info("Приватный ключ успешно получен. Алгоритм приватного ключа: {}", privateKey.getAlgorithm());
        X509Certificate certificate = (X509Certificate) keyStore.getCertificate(ALIAS);


        final Signature signature = Signature.getInstance(JCP.GOST_SIGN_2012_256_NAME);
        signature.initSign(privateKey);
        signature.update(INPUT_DATA.getBytes(StandardCharsets.UTF_8));
        final byte[] sign = signature.sign();

    @Test
    void shouldCreatePKCS7() throws KeyStoreException, NoSuchProviderException, CertificateException, IOException, NoSuchAlgorithmException, UnrecoverableKeyException, InvalidKeyException, SignatureException, Asn1Exception {
        JCPInit.initProviders(false);

        InputStream privateKeyInputStream = SignUtilTest.class.getClassLoader().getResourceAsStream("static/test.pfx");
        KeyStore keyStore = KeyStore.getInstance(JCSP.PFX_STORE_NAME, JCSP.PROVIDER_NAME);
        keyStore.load(privateKeyInputStream, KEY_PASSWORD.toCharArray());
        //Получение всех CN из контейнера
        keyStore.aliases().asIterator().forEachRemaining(System.out::println);

        // Получение приватного ключа
        log.info("Получение приватного ключа...");
        PrivateKey privateKey = (PrivateKey) keyStore.getKey(ALIAS, KEY_PASSWORD.toCharArray());
        log.info("Приватный ключ успешно получен. Алгоритм приватного ключа: {}", privateKey.getAlgorithm());
        X509Certificate certificate = (X509Certificate) keyStore.getCertificate(ALIAS);


        final Signature signature = Signature.getInstance(JCP.GOST_SIGN_2012_256_NAME, JCSP.PROVIDER_NAME);
        signature.initSign(privateKey);
        signature.update(INPUT_DATA.getBytes(StandardCharsets.UTF_8));
        final byte[] sign = signature.sign();

        // Формируем контекст подписи формата PKCS7.

        final ContentInfo all = new ContentInfo();
        all.contentType = new Asn1ObjectIdentifier(
                new OID(CMStools.STR_CMS_OID_SIGNED).value);

        final SignedData cms = new SignedData();
        all.content = cms;
        cms.version = new CMSVersion(1);

        // Идентификатор алгоритма хеширования.

        cms.digestAlgorithms = new DigestAlgorithmIdentifiers(1);
        final DigestAlgorithmIdentifier a = new DigestAlgorithmIdentifier(
                new OID(CMStools.DIGEST_OID).value);
        a.parameters = new Asn1Null();
        cms.digestAlgorithms.elements[0] = a;

        // Т.к. подпись отсоединенная, то содержимое отсутствует.

        cms.encapContentInfo = new EncapsulatedContentInfo(
                new Asn1ObjectIdentifier(new OID(CMStools.STR_CMS_OID_DATA).value), null);

        // Добавляем сертификат подписи.

        cms.certificates = new CertificateSet(1);
        final ru.CryptoPro.JCP.ASN.PKIX1Explicit88.Certificate asnCertificate =
                new ru.CryptoPro.JCP.ASN.PKIX1Explicit88.Certificate();

        final Asn1BerDecodeBuffer decodeBuffer =
                new Asn1BerDecodeBuffer(certificate.getEncoded());
        asnCertificate.decode(decodeBuffer);

        cms.certificates.elements = new CertificateChoices[1];
        cms.certificates.elements[0] = new CertificateChoices();
        cms.certificates.elements[0].set_certificate(asnCertificate);

        // Добавляем информацию о подписанте.

        cms.signerInfos = new SignerInfos(1);
        cms.signerInfos.elements[0] = new SignerInfo();
        cms.signerInfos.elements[0].version = new CMSVersion(1);
        cms.signerInfos.elements[0].sid = new SignerIdentifier();

        final byte[] encodedName = certificate.getIssuerX500Principal().getEncoded();
        final Asn1BerDecodeBuffer nameBuf = new Asn1BerDecodeBuffer(encodedName);
        final Name name = new Name();
        name.decode(nameBuf);

        final CertificateSerialNumber num = new CertificateSerialNumber(
                certificate.getSerialNumber());

        cms.signerInfos.elements[0].sid.set_issuerAndSerialNumber(
                new IssuerAndSerialNumber(name, num));
        cms.signerInfos.elements[0].digestAlgorithm =
                new DigestAlgorithmIdentifier(new OID(CMStools.DIGEST_OID).value);
        cms.signerInfos.elements[0].digestAlgorithm.parameters = new Asn1Null();
        cms.signerInfos.elements[0].signatureAlgorithm =
                new SignatureAlgorithmIdentifier(new OID(CMStools.SIGN_OID).value);
        cms.signerInfos.elements[0].signatureAlgorithm.parameters = new Asn1Null();
        cms.signerInfos.elements[0].signature = new SignatureValue(sign);

        final Asn1BerEncodeBuffer asnBuf = new Asn1BerEncodeBuffer();
        all.encode(asnBuf, true);
        byte[] result = asnBuf.getMsgCopy();

        Array.writeFile(FileUtils.getFile(FILE_FOR_SIGN), INPUT_DATA.getBytes(StandardCharsets.UTF_8));
        Array.writeFile(FileUtils.getFile(FILE_SIGNATURE_P7S), result);
    }